Journal articles: 'PWM Inverter'

1

Taniguchi, Katsunori, and Masakazu Inoue. "PWM Technique for PAM Inverter." IEEJ Transactions on Industry Applications 112, no. 2 (1992): 185–86. http://dx.doi.org/10.1541/ieejias.112.185.

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Inoue, Masakazu, and Katsunori Taniguchi. "A Sinusoidal PAM-PWM Inverter." IEEJ Transactions on Industry Applications 112, no. 9 (1992): 837–43. http://dx.doi.org/10.1541/ieejias.112.837.

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Inoue, Masakazu, and Katsunori Taniguchi. "A sinusoidal PAM-PWM inverter." Electrical Engineering in Japan 113, no. 7 (1993): 126–34. http://dx.doi.org/10.1002/eej.4391130712.

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Putra, Sony Prakarsa, and Zulwisli Zulwisli. "INVERTER PWM UNTUK MENGGERAKKAN MESIN ARUS SEARAH TANPA SIKAT BERBASIS ARDUINO." Voteteknika (Vocational Teknik Elektronika dan Informatika) 7, no. 4 (January 28, 2020): 68. http://dx.doi.org/10.24036/voteteknika.v7i4.106466.

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This study aims to create a PWM inverter that can drive the Brushless Unidirectional Flow Machine (MASTS). PWM inverters are intended to correct deficiencies in six-step inverters. Inverter is a circuit that is used to convert a DC voltage source into an AC voltage with a certain frequency. The use of inverters is found in electric vehicles. The system often used to control an inverter is a Pulse Width Modulation (PWM) based control, where pulse width is used to regulate speed. The inverter is tested using 3 pairs of mosfets as a switch to control the three-phase output of the inverter. In the inverter, PWM is used to adjust the width of the frequency pulse that will be given to the mosfet. This research used 3 variations of duty cycle 30%, 60%, 90% to determine the effect of MASTS speed on PWM by using a PWM inverter. The results of this study the speed of MASTS can be influenced by changes in duty cycle, with increasing value of the duty cycle, the faster the speed of MASTS, and vice versa. Keywords:Mosfet, Sensor Hall, MASTS, PWM, Inverter.

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Bright, Shibu J. V., V. Suba, S. Ramkumar, and S. Jeevananthan. "Investigation on Harmonic Spreading Effect of Conventional and Innovative Multi-Level Inverter Control Strategies." Applied Mechanics and Materials 626 (August 2014): 141–49. http://dx.doi.org/10.4028/www.scientific.net/amm.626.141.

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The pulse width modulation (PWM) strategy employed in the voltage source inverter (VSI) not only control the magnitude of the output voltage but also the quality. Performance evaluations of such strategies are done in terms of fundamental voltage, total harmonic distortion (THD), switching losses etc. (primary indices) and also in terms of acoustic noise, electromagnetic interference (EMI), harmonic spread factor, distribution of harmonic power etc. (secondary indices). Multilevel inverter (MLI) has become unanimous choice in medium and high power applications due to their superior performance compared to three level inverters. The conventional Sub-Harmonic PWM (SHPWM) scheme and its variations offer the output voltage spectrum with high intensity harmonic components around the switching frequency; it will end with cluster harmonic with high acoustic noise. The first objective of this paper is to investigate harmonic spreading effects of existing multilevel inverter (MLI) strategies. Secondly the developing innovative PWM strategies for MLIs based on modified reference and carrier functions, which were proved for superior the primary indices at three-level VSI. Thorough simulation study of Pulse width modulation strategies such as SHPWM, inverted sine carrier PWM, MWM PWM, third harmonic injection PWM, triplen harmonic injection PWM, analog space vector PWM, trapezoidal PWM and discontinuous PWM for a cascaded multilevel inverter, are presented with results of primary and secondary indices. Hence, the PWM strategies of MLI are evaluated for harmonic spreading effect first time and a guide line for a beginner to select the PWM scheme for MLI fed drive systems is stenciled.

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Gudipati, Kishor, Harsha Vardhan Reddy Maramreddy, Sri Gowri Kolli, Vuyyuru Anantha Lakshmi, and Girireddy Sreenivasa Reddy. "Comparison of Pulse Width Modulation Techniques for Diode-Clamped and Cascaded Multilevel Inverters." Engineering, Technology & Applied Science Research 13, no. 4 (August 9, 2023): 11078–84. http://dx.doi.org/10.48084/etasr.5939.

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Multilevel inverter technology has become the most significant method of energy conversion from DC to AC for uninterrupted power supply. The quality of the power supply depends on the appearance of harmonics, which is considered a problem that needs to be overcome. This paper demonstrates the use of a new modulation technique to reduce the harmonics in both diode-clamped and cascaded multilevel inverters, examining its Total Harmonic Distortion (THD) compared to other PWM methods. Simulations were carried out in MATLAB/Simulink for five-level diode-clamped and cascaded multilevel inverters. The simulation results of both multilevel inverters using the sinusoidal PWM, modified reference PWM, modified carrier PWM, and modified reference and modified carrier PWM methods showed that the latter had the best THD performance for both inverter types, especially for the cascaded multilevel inverter.

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Perra, A. "PWM inverter technology." IEEE Aerospace and Electronic Systems Magazine 7, no. 4 (April 1992): 20–22. http://dx.doi.org/10.1109/62.143194.

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Qi, Xiaojing, and Jianyong Zheng. "VSG Control for Cascaded Three-Phase Bridge Based Battery Inverter." World Electric Vehicle Journal 14, no. 8 (July 30, 2023): 203. http://dx.doi.org/10.3390/wevj14080203.

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With the increasing number of new energy sources connected to the grid, the unbalanced output of three-phase grid-connected inverters and the lack of no inertia and damping characteristics in the traditional microgrid control system will seriously affect the stability of voltage, frequency, and power angle for microgrids. This paper proposes a novel cascaded three-phase bridge inverter topology for the battery system used for the electric vehicle. Compared with traditional cascaded H-bridge inverters, the proposed multilevel inverter can achieve self-adaptive balance for three phases. The mathematical model of a cascaded three-phase bridge inverter is established in this paper. Based on the voltage and current equations of a multilevel inverter, a new modulation strategy named carrier phase-shifted-distributed pulse width modulation (CPSD-PWM) was developed, which is more suitable for cascaded three-phase bridge inverters. The harmonic analytic equations of carrier phase-shifted pulse width modulation (CPS-PWM) and CPSD-PWM are constructed by the double Fourier analysis method. Compared with the traditional PWM modulation strategy, the CPSD-PWM can reduce the output harmonics and improve the balance of the three-phase output, which can realize the three-phase adaptive balance in the cascaded three-phase bridge inverter. This paper develops a cascaded three-phase bridge multilevel power converter system based on the virtual synchronous generator (VSG) control strategy. The voltage and frequency of inverter output can be accurately controlled in both island mode and grid-connected mode through active power-frequency regulation and reactive power–voltage regulation, and the stability of primary frequency regulation for the multilevel microgrid inverter can be improved by collaborative optimization of virtual inertia and virtual damping. The CPSD-PWM modulation strategy and VSG control strategy are verified by the simulation results and experimental data for the cascaded three-phase bridge inverter.

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Satiawan, I. Nyoman Wahyu, Ida Bagus Fery Citarsa, Warindi, I Ketut Wiryajati, Supriono, Ni Made Seniari, and I Made Budi Suksmadana. "Improved Modulation Methods of the Dual-inverter Fed Open-end Winding Three-phase Motor Drives with Equal DC-link Voltage." International Journal of Electrical, Energy and Power System Engineering 5, no. 3 (November 1, 2022): 93–98. http://dx.doi.org/10.31258/ijeepse.5.3.93-98.

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This paper investigates PWM method for the dual-inverter fed open end winding three-phase induction motor drives. This is aimed to improve the quality of the output voltage as well as to enhance the motor performance by solving the drawback of the PWM method. The proposed PWM method operates two inverters in different technique, i.e one inverter operates in square wave mode (slow switching) and one inverter in PWM mode (fast switching). Although the PWM method can improve the quality of the inverter output voltage over the two-level inverter output, the proposed PWM method causes an excessive ripple in both torque and stator current especially at the transient period. The drawback is solved by applying a new switching strategy that manage the inverter switches operate in turn between slow switching and fast switching in one circle of operation. The proposed method is verified via simulation. The result shows that the quality of output voltages improves for all modulation indices in comparison with two-level inverter. Furthermore, torque ripple is reduced, and current ripple are improved as the current waveform is enhanced to be more symmetrical.

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Yanshu, Niu. "Single Phase Sine Wave PWM Inverter Circuit Simulation And The Design Of Filter Based On Matlab." MATEC Web of Conferences 232 (2018): 04030. http://dx.doi.org/10.1051/matecconf/201823204030.

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Inverter circuit is the most important application of PWM control technology. This paper mainly discusses the unipolar PWM ( pulse width modulation ) control mode of single-phase bridge inverter circuit, and uses MATLAB visual simulation tool Simulink to model the circuit. At the same time, a filter is designed to filter the waveform of the inverted output so that the output waveform can reach a smooth sine wave shape. This simulation not only deepens the understanding of PWM inverter circuit theory, but also lay a good experimental foundation for the study of modern power electronics.

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Vijayakumar, Arun, Albert Alexander Stonier, Geno Peter, Praghash Kumaresan, and Elenor M. Reyes. "A Modified Seven-Level Inverter with Inverted Sine Wave Carrier for PWM Control." International Transactions on Electrical Energy Systems 2022 (July 21, 2022): 1–12. http://dx.doi.org/10.1155/2022/7403079.

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The conventional multilevel inverter necessitates more active switching devices and high dc-link voltages. To minimalize the employment of switching devices and dc-link voltages, a novel topology has been proposed. In this paper, a novel minimum switch multilevel inverter is established using six switches and two dc-link voltages in the proportion of 1 : 2. In addition, the proposed topology is proficient in making seven-level voltages by appropriate gate signals. The PWM signals were produced using several inverted sine carriers and a single trapezoidal reference. When compared to other existing inverters, this configuration needs fewer components, as well as fewer gate drives. Furthermore, this module can generate a negative level without the use of a supplementary circuit such as an H-Bridge. As a result, overall cost and complexity are greatly reduced. The proposed minimum switch multilevel inverter operation is validated through simulations followed by experimental results of a prototype.

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Kumar, Anurag, Shashank Saxena, and Prashant Kumar Singh. "Multilevel Inverters based on Photovoltaics System used with Multicarrier PWM." Journal of Futuristic Sciences and Applications 1, no. 2 (2018): 28–38. http://dx.doi.org/10.51976/jfsa.121804.

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The fundamental purpose of this research is to develop a photovoltaic-based MLI that implements a pulse width modulation strategy as its mode of operation. Within the context of this specific illustration of a multilayer inverter, two switches are used so that the fundamental frequency and the carrier frequency may be switched. The first three sections of this article focus on analyzing and discussing the impact that varied levels of carrier signal have on inverters. Determine the effect that it has on the voltage, current, and harmonics distortion. Check to determine what type of impact it has. Second, the effect of the change in output under various loads in the PV-based multilayer inverter and the counting of the harmonics that resulted from that change. Another one of the comparisons between a seven-level inverter and a nine level hybrid inverter and its harmonics used a multilevel PV-based inverter to decrease the harmonics distortion, boost the output voltage, and illustrate the influence in losses. This was one of the comparisons that involved a seven-level inverter. Calculations and results acquired from a modified version of the MATLAB program indicate that the whole harmonics range may be covered by combining the level change technology with multi-stage hybrid inverters. These calculations and results were achieved.

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Chen, Jyh Wei, Yi Hong Liu, Chi Hou Chen, Yi Lin Yueh, Yun Chi Tzeng, and Jian Shiang Syu. "Design of Parallel Interleaved-Phase-Shift-PWM Inverters with Voltage Feedback Control." Applied Mechanics and Materials 229-231 (November 2012): 923–28. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.923.

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The paper is to design and implement parallel operation of paralleled inverters with interleaved phase shift. For parallel operation, one inverter is used as master module to transmit synchronization signals to trigger the external interrupts of two microcontrollers for synchronous operation to slave module. In this paper, the design of voltage controlled loop feedback controller by proportional-integral controller is employed to have fast transient response with different load conditions. It is proposed that interleaved phase shift for parallel inverters could reduce output voltage ripple of inverter and increase the system response. The experimental results show that the proposed inverter provided a voltage output with low harmonic distortion by the proposed interleaving phase-shift parallel inverter scheme.

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Harahap, Charles R. "Sistem Pengendalian Kecepatan Dua Motor Brushless DC (BLDC) dengan Nine Switch Inverter Menggunakan Metode PWM." Electrician 16, no. 3 (September 30, 2022): 338–45. http://dx.doi.org/10.23960/elc.v16n3.2388.

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Abstract — Two three phase inverters which consists of 12 switches are generally required to control two brushless DC Motors, which are complicated and inefficient to control them. One inverter has 6 switches. This research develops controlling of two brushless DC Motors using nine switch inverters with Pulse Width Modulation method. Nine switch inverter needs PWM for controlling frequency and voltage. Arduino is used to generate PWM in this research. Nine switch inverters are used to convert DC voltage to AC Voltage because of BLDC needs AC Voltage to drive the rotor of motors. In controlling two BLDC Motors, it includes switching control using PWM, to adjust the input frequency which then results in the effect of frequency on the voltage, current, speed of two BLDC Motors and torque. The test of this controller consists of the condition of the motor with and without load. The test results show that the speed of two BLDC motors can be controlled simultaneously with nine switch inverters by adjusting the input frequency. Keywords— two brushless DC motors, nine switch inverter, pulse width modulation (PWM), Arduino, Simulink Matlab

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Ramesh,, Adireddy, O. Chandra Sekhar, and M. Siva Kumar. "A Simplified PWM Technique for Reduced Switch Count Multilevel Inverter." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 3 (March 1, 2018): 711. http://dx.doi.org/10.11591/ijeecs.v9.i3.pp711-721.

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Penetration of multilevel inverters (MLI) in to high power and medium voltage application has been increasing because of its advantages. The conventional two levels inverter has high harmonic distortion which gives poor power quality. Lot of topologies has been developed to overcome the drawbacks of a two level inverter. These topologies include more number of switching devices which increases the design complexity and cost. The optimum design of inverter requires less number of switches with better quality in waveform. In this paper, a symmetrical five level and seven levels inverter configuration with simplified pulse width modulation technique is proposed. This proposed inverter requires less switches, less protection circuits along with low cost and size. The analysis of the inverter circuits is done by using Matlab/Simulink software. The synthesized staircase wave form is shown and total harmonic distortion (THD) is also measured.

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Simran, Shainey, and Roshan Nayak. "Multi-level PWM Inverter for PV Systems Improving the THD." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 14, no. 02 (June 30, 2022): 211–15. http://dx.doi.org/10.18090/samriddhi.v14i02.15.

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In the last few years, the use of semiconductors in the electronic market has increased a lot, due to which its utilization in power electronic devices has also increased greatly, including UPS, AC drives, HVDC transmission line rectifiers, inverters and many more. We categorize the inverter in many ways like diode line capacitor cascade h-bridge diode climb like this but we do voltage source inverter in two ways if we look like multi-level inverter then two-level inverter multi-level letter Maybe and we are using multi-level inverter here. In this paper, we are discussing the performance of second level inverter using space vector PWM and further using for mains performance using disposition multicarrier moderation. In this paper we are using fuzzy logic to control WM, the factors we are working out are the total harmonics distortion switching frequency switching losses and the number of switching devices. Here the complete simulation is using MATLAB/Simulink software.

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B G, Shivaleelavathi, Chinmayi Srikanth, and Veeramma Yatnalli. "Review on Multi Level Inverter Topologies and Control Strategies for Solar Power Conversion." EMITTER International Journal of Engineering Technology 8, no. 2 (August 5, 2020): 295–315. http://dx.doi.org/10.24003/emitter.v8i2.500.

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Nowadays solar power has become an alternate method of power generation for standalone systems for both urban and rural electrification. The Power Electronics converters used for the power conversion should provide quality AC output to have near sinusoidal voltage. The inverter topology and the PWM technique of the inverter play a vital role in providing quality output. This paper reviews recent contribution to establish the current status and development of the technology to provide reader with an insightful review of multilevel inverters and its control strategy. A brief overview of Multi Level Inverters (MLI) topology and advantages of Cascaded H-Bridge Multi Level Inverter (CHBMLI) for solar power conversion is presented and the various control strategies for CHBMLI are discussed with view point of quality output. Among the different PWM techniques discussed, the Elliptical Multi Carrier PWM (EMC PWM) control strategy is the new modulation technique which successfully improves the DC bus utilization without over-modulation and without adding third harmonic to fundamental frequency. Also, the technique is successful in reducing the %THD at the output voltage. The control strategy is simple even with increased level of output voltage, which is not possible in SVPWM technique. Hence, the EMC PWM technique is having better performance when compared to Multi Carrier PWM (MCPWM) technique, Space Vector PWM (SVPWM) technique and Third Harmonic Injection PWM (THIPWM) technique.

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Guo, You Gui, Ping Zeng, Jie Qiong Zhu, Li Juan Li, Wen Lang Deng, and Frede Blaabjerg. "Modeling and Simulation of Single-Phase Full Bridge Two-Level PV H6 Inverter Connected to Grid." Advanced Materials Research 217-218 (March 2011): 1821–24. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1821.

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PLECS is used to model the PV H6 inverter connected to grid and good results are obtained. First, several common topologies of PV inverters are introduced. Then the unipolar PWM control strategy is described for PV H6 inverter. Third, PLECS is briefly introduced. Fourth, the modeling of PV H6 inverter is presented with PLECS. Finally, a series of simulations are carried out. The simulation results tell us PLECS is very powerful tool to real power circuits and it is very easy to simulate LCL filter. They have also verified that the unipolar PWM control strategy is feasible to control the PV H6 inverter.

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Hasabelrasul, Hashim, and Xiangwu Yan. "Comparison of Multicarrier PWM Techniques for Cascaded H-Bridge Multilevel Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 2 (June 1, 2017): 861. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp861-868.

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One of the preferred choices of electronic power conversion for high power applications are multilevel inverters topologies finding increased attention in industry. Cascaded H-Bridge multilevel inverter is one of these topologies reaching the higher output voltage, power level and higher reliability due to its modular topology. Level Shifted Carrier Pulse Width Modulation (LSCPWM) and Phase Shifted Carrier Pulse Width Modulation are used generally for switching cascaded H-bridge (CHB) multilevel inverters. This paper compares LSCPWM and PSCPWM in terms of total harmonics distortion (THD) and output voltage among inverter cells. Simulation for 21-level CHB inverter is carried out in MATLAB/SIMULINK and simulation results are presented.

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-, Jahanzeb, Shahrin Md. Ayob, Saifullah Khan, Mohd Zaki Daud, and Razman Ayop. "Switching Modulation Strategies for Multilevel Inverter." ELEKTRIKA- Journal of Electrical Engineering 20, no. 2 (August 28, 2021): 1–7. http://dx.doi.org/10.11113/elektrika.v20n2.253.

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There is always a need to create efficient and optimized converters to deliver the best possible results to achieve a better THD profile in the waveform output. One way is by controlling the switching of the power switches of the converters using appropriate modulation schemes. While numerous works have been done in proposing new switching modulation strategies for multilevel inverters, this work will compare multicarrier PWM and near-to-level control (NLC) modulation schemes. In this paper, multicarrier PWM variants, namely, PD-PWM, POD-PWM, and APOD-PWM, are designed and simulated. Their voltage THD and spectrum performance are discussed when applied to single-phase 7, 9, and 11-level cascaded multilevel inverters. Then NLC modulation will be designed and applied to similar multilevel inverter circuits. It will be shown that the NLC exhibits some superior performances compared to PWM-based but with several drawbacks that can be optimized.

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Nayeemuddin, M., T. Bramhananda Reddy, and M. Vijaya Kumar. "Level Shifted Discontinuous PWM Algorithms to Minimize Common Mode Voltage for Cascaded Multilevel Inverter Fed Induction Motor Drive." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 2 (June 1, 2018): 504. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp504-518.

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This paper presents combinations of level shifted pulse-width modulation algorithm with conventional discontinuous pulse-width modulation methods for cascaded multilevel inverters. In the proposed DPWM a zero sequence signal is injected in sinusoidal reference signal to generate various modulators with easier implementation. The analysis four various control strategies namely Common Carrier (CC), Inverted Carrier (IC), Phase Shifted (PS) and Inverted Phase Shift (IPS) for cascaded multilevel inverter fed induction motor drive has been illustrated. To validate the proposed work experimental tests has been carried out using dSPACE controller. Experimental study proves that using proposed algorithms reduction in common-mode voltage with fewer harmonics along with reduced switching loss for a cascaded multilevel inverter fed motor drive has been achieved.

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Dr. Sujatha Balaraman,, P. Yogini. "Three Phase Eleven Level Modular Multilevel Inverter with PD-PWM for Grid Connected System." International Journal for Modern Trends in Science and Technology, no. 8 (August 7, 2020): 86–91. http://dx.doi.org/10.46501/ijmtst060816.

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The prominence of Modular Multilevel Inverters (MMI) is rising owing their merits of simple mechanical construction and good voltage sharing for semiconductor devices. Mostly Multilevel Inverters use more than one source; however, the effective use of all the sources at all levels is rare. Conventional Multilevel Inverters will diminish the energy efficiency of the conversion system. When compared to conventional multilevel inverter, Modular Multilevel Inverter with a high numbers of voltage levels seem to be the most suitable because of the use of an isolated dc source. This paper explores a three-phase eleven level modular multilevel inverter with phase disposition pulse width modulation technique (PD-PWM) that can extract power from all the sources at all the levels. Besides, this paper develops a synchronous d-q reference frame controller to control the current of 11kV. When compared with Reduced Switch Count based Multilevel Inverter Series/Parallel switching topologies, the Modular Multilevel Inverter provides better Total Harmonic Distortion (THD) of output voltage and utilization factor.

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Albatran, Saher, Issam A. Smadi, and Mohammad A. Alsyouf. "Experimental Validation of Shared Inverter Topology to Drive Multi AC-Loads." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 2 (April 1, 2018): 793. http://dx.doi.org/10.11591/ijece.v8i2.pp793-805.

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Many reduced-switch-count (RSC) inverter topologies have been proposed in the literature. As the number of switches required to produce a set of voltages in RSC inverters are less than that in conventional inverter, as a result utilizing RSC inverters in a certain system reduces its size and cost. In this paper, a novel RSC shared inverter topology consisting of fifteen switches and capable of driving four three-phase AC-loads independently is proposed and experimentally verified. A carrier-based pulse width modulation (PWM) technique that employs the zero-sequence-signal injection principle is developed to drive the proposed inverter along with adequate DC voltage bus utilization between the shared loads for common frequency (CF) as well as different frequency (DF) modes. The structure and the principle of operation of the proposed inverter are introduced and intensively verified using simulation and field-programmable-gate-array (FPGA)-in-the-loop simulation under linear and nonlinear loads. Then, Inverter prototype was built and the proposed inverter has been verified experimentally. The experimental results verify the applicability of the proposed inverter and the employed PWM.

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Periyanayagam, Madasamy, Suresh Kumar V, Bharatiraja Chokkalingam, Sanjeevikumar Padmanaban, Lucian Mihet-Popa, and Yusuff Adedayo. "A Modified High Voltage Gain Quasi-Impedance Source Coupled Inductor Multilevel Inverter for Photovoltaic Application." Energies 13, no. 4 (February 17, 2020): 874. http://dx.doi.org/10.3390/en13040874.

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The quasi-impedance source inverters/quasi-Z source inverters (Q-ZSIs) have shown improvement to overwhelmed shortcomings of regular voltage-source inverters (VSIs) and current-source inverters (CSIs) in terms of efficiency and buck-boost type operations. The Q-ZSIs encapsulated several significant merits against conventional ZSIs, i.e., realized buck/boost, inversion and power conditioning in a single power stage with improved reliability. The conventional inverters have two major problems; voltage harmonics and boosting capability, which make it impossible to prefer for renewable generation and general-purpose applications such as drive acceleration. This work has proposed a Q-ZSI with five-level six switches coupled inverter. The proposed Q-ZSI has the merits of operation, reduced passive components, higher voltage boosting capability and high efficiency. The modified space vector pulse width modulation (PWM) developed to achieve the desired control on the impedance network and inverter switching states. The proposed PWM integrates the boosting and regular inverter switching state within one sampling period. The PWM has merits such as reduction of coupled inductor size, total harmonic reduction with enhancing of the fundamental voltage profile. In comparison with other multilevel inverters (MLI), it utilizes only half of the power switch and a lower modulation index to attain higher voltage gain. The proposed inverter dealt with photovoltaic (PV) system for the stand-alone load. The proposed boost inverter topology, operating performance and control algorithm is theoretically investigated and validated through MATLAB/Simulink software and experimental upshots. The proposed topology is an attractive solution for the stand-alone and grid-connected system.

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Chang, En-Chih, Hung-Liang Cheng, Chien-Hsuan Chang, Rong-Ching Wu, Chun-An Cheng, Zheng-Kai Xiao, Wen-Jie Lu, and Zhi-Yu Wei. "Robust Optimal Control Design for Performance Enhancement of PWM Voltage Source Inverter." Micromachines 13, no. 3 (March 12, 2022): 435. http://dx.doi.org/10.3390/mi13030435.

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PWM (pulse-width modulation) voltage source inverters are used in a wide range of AC power systems where the output voltage must be controlled to follow a sinusoidal reference waveform. In order to achieve precision and fast-tracking control, restrictive sliding mode control (RSMC) provides a fast system state convergence time. However, the RSMC still suffers from the chattering problem, which leads to high harmonic distortion and slow response of the inverter output state. Furthermore, the load of the inverter may be severe load changing and the control parameters become difficult to adjust, worsening the adaptability to achieve the desired control of the inverter output. In this paper, a robust optimal control design comprised of an enhanced restrictive sliding mode control (ERSMC) and density particle swarm optimization (DPSO) algorithm is proposed, and then applied to PWM voltage source inverters. The ERSMC not only has finite time convergence but also provides chatter elimination. The DPSO is highly adaptable for acquiring the control parameters of the ERSMC and finding the best solution in the global domain. The proposed controller is realized for the actual PWM voltage source inverter controlled by a TI DSP-based development platform, so that the inverter output voltage has fast dynamic response and satisfactory steady-state behavior despite high load changing and non-linear disturbances.

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Kani, N. Ismayil, B. V. Manikandan, and Prabakar Perciyal. "A Novel Soft Switching Based Fuzzy Logic Control for Single Phase Inverter." Applied Mechanics and Materials 573 (June 2014): 143–49. http://dx.doi.org/10.4028/www.scientific.net/amm.573.143.

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—This The Pulse Width Modulation (PWM) DC-to-AC inverter has been widely used in many applications due to its circuit simplicity and rugged control scheme. It is however driven by a hard-switching pulse width modulation (PWM) inverter, which has low switching frequency, high switching loss, high electro-magnetic interference (EMI), high acoustic noise and low efficiency, etc. To solve these problems of the hard-switching inverter, many soft-switching inverters have been designed in the past. Unfortunately, high device voltage stress, large dc link voltage ripples, complex control scheme and so on are noticed in the existing soft-switching inverters. This proposed work overcomes the above problems with simple circuit topology and all switches work in zero-voltage switching condition. Comparative analysis between conventional open loop, PI and fuzzy logic based soft switching inverter is also presented and discussed. Keywords—Zero voltage switching, Inverter, Dc link, PI controller, Fuzzy logic system control ,Modulation strategy, Soft switching

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G., Raja, and Meganathan T. "FPGA Based PWM of Cascaded Multilevel Voltage Source Inverter." International Journal of Advance Research and Innovation 3, no. 1 (2015): 159–65. http://dx.doi.org/10.51976/ijari.311529.

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Multilevel inverters have grasped attention in the past few years as power converters in many applications. They are advantageous over the conventional two-level inverters because of the capability of reducing the lower order harmonic contents by increasing the number of levels. Many studies and research have been done for generation of modulating signals for multilevel inverters. Modulation signal generation methods for these inverters include staircase modulation, sine-triangle carrier modulation, space vector modulation etc. Various topologies of multilevel inverter provides several advantages including lower voltage stress, higher efficiency, lower EMI, better waveform and improved THD. This paper presents the development of Altium FPGA as a control circuit for generation of the digital pulse width modulation (DPWM) signal for the single-phase cascaded H-bridge multilevel inverter. The FPGA chip is chosen for the hardware implementation due to its ability to produce accurate results at a high computational speed. Counter based digital pulse width modulation (DPWM) for increased resolution without unnecessarily increasing the clock frequency is used. In addition to Altium Nanoboard FPGA, Xilinx System Generator/MATLAB software has been used for simulation and verification of the proposed circuit before implementation. The simulation and experimental results are in close agreement.

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Foti, Salvatore, Antonio Testa, Salvatore De Caro, Tommaso Scimone, Giacomo Scelba, and Giuseppe Scarcella. "Multi-Level Open End Windings Multi-Motor Drives." Energies 12, no. 5 (March 5, 2019): 861. http://dx.doi.org/10.3390/en12050861.

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A multi-level open-end winding converter topology for multiple-motor drives is presented featuring a main multi-level inverter processing the power delivered to the motors and an active filter based on an auxiliary two-level inverter. The main inverter operates at the fundamental frequency in order to achieve low switching power losses, while the active filter is Pulse Width Modulation (PWM) operated to suitably shape the motor currents. The proposed configuration features less phase current distortion than conventional multi-level inverters operating at the fundamental frequency, while achieving a higher efficiency compared to PWM multi-level inverters. Experimental results confirm the effectiveness of such a configuration on both multiple motors-single converter and multiple motor-multiple converter drives.

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Hadj Benali, Farouk, Fouad Azzouz, and Ghalem Bachir. "The Operating Improvement of the Supply Source and the Optimization of PWM Control." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 3 (September 1, 2015): 603. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp603-614.

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In this paper the operating improvement of the supply source and the optimization of PWM control are proposed. A comparison (based on the better operating in terms of input voltage) between the multilevel inverters (NPC multilevel inverter and H bridge inverter) is studied. Then two control strategies (the SPWM and the suboptimal PWM) are applied to the multilevel inverter which has the better voltage performance. At last a comparison between these two control techniques based on two essential points, the THD and the output voltage value. A comparison between our results and results taken from literature is also presented in this paper. Simulations are carried out using PSIM environment.

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Chan, F. H. Y., and K. H. Cheng. "Microprocessor-Based Interactive PWM Inverter." International Journal of Electrical Engineering Education 22, no. 3 (September 1985): 213–19. http://dx.doi.org/10.1177/002072098502200307.

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Saminathan S & Dr. Ranjithkumar K. "Multicarrier PWM Based Control of Modular Multilevel Inverter with Grid Connected Solar PV System." International Journal for Modern Trends in Science and Technology 7, no. 05 (May 27, 2021): 72–80. http://dx.doi.org/10.46501/ijmtst0705011.

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In this work, a new modular multilevel inverter topology is introduced for a single phase grid connected Photovoltaic system. This multilevel inverter use less number of switches to generate seven levels compared to other conventional multilevel inverters. This requires only one isolated dc source to operate. So it is suitable for renewable energy application. This inverter is designed by submodule configuration; each sub module contains two switches and one DC link capacitor. The sub modules will be added to the inverter depending on number of levels. The voltage balancing of DC link capacitor is carried out by Y matrix PWM technique. Because of Y matrix PWM technique, the inverter gets a self capacitor voltage balancing ability. So there is no need of external devices required for balancing the voltage of capacitor. A PLL for grid integration and LCL filter are designed and integrated with this inverter. The simulation of proposed system is carried out by MATLAB/SIMULINK and performance of THD is monitored as per standards

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Oleschuk, V. I. "GRID-CONNECTED PV SYSTEM EMPLOYING THREE INVERTERS REGULATED BY SYNCHRONOUS SCHEME OF PWM." Tekhnichna Elektrodynamika 2022, no. 5 (August 18, 2022): 23–28. http://dx.doi.org/10.15407/techned2022.05.023.

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The paper presents comparative analysis of three versions of the modified scheme of space-vector-based synchronous pulsewidth modulation (PWM), applied for control of three two-level inverters of transformer-based photovoltaic (PV) system, and focused on providing of the symmetry of winding voltage of power transformer during the whole adjustment range. Power supply of inverters is providing by the corresponding three solar strings consisting of a set of PV panels, and the outputs of three inverters are connected specifically with inverter-side windings of multi-winding grid-tired transformer. Results of MATLAB-simulation prove the fact of advanced spectral composition of the winding voltage of triple-inverter-based PV installation regulated by algorithms of synchronous space-vector PWM, assuring potential reduction of losses in these systems. References 10, table 1, figures 9.

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Huang, Ping Lin, Guo Sheng Cheng, and Ai Ping Yan. "A Novel Model for Predicting Iron Losses of Electrical Steels Fed by PWM Inverter." Advanced Materials Research 298 (July 2011): 179–82. http://dx.doi.org/10.4028/www.scientific.net/amr.298.179.

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Based on the Bessel function, a novel calculation model of iron losses of electric magnetic material fed by PWM inverter is proposed. Considering the influence of modulation index of inverters, the numerical relationship between material iron losses and PWM modulation index is presented. By improving on the Epstein frame measuring system, a method is proposed to measure the material loss under non-sinusoidal voltage, two three-phase experimental induction motors fed by inverter is considered, the results prove the model is valid.

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Rao, S. Nagaraja, D. V. Ashok Kumar, and Ch Sai Babu. "Implementation of Cascaded based Reversing Voltage Multilevel Inverter using Multi Carrier Modulation Strategies." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 220. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp220-230.

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In this paper, a cascaded based reversing voltage (CBRV) multilevel inverter structure is proposed inorder to compensate the major drawbacks in the conventional multilevel inverters. The proposed topology requires less number of components, less carrier signals and gate drives when compared to existing multilevel inverters particularly at higher levels. Therefore, the complexity and overall cost are greatly reduced particularly for higher output voltage levels. This paper also presents the most relevant control and modulation methods by a triangular based multi carrier pulse width modulation (PWM) scheme for the proposed CBRV inverter topology. This paper presents a comparison between different modulation strategies for CBRV inverter topology based on sinusoidal and space vector references with multi triangular carrier waves. The work strive hard to present the scrutiny that has been made between various PWM control techniques for 1–Ф seven level CBRV inverter structure. The comparison is made in terms of Total Harmonic Distortion (THD) and fundamental RMS voltage. Finally, the simulation results are included to verify the effectiveness of the proposed CBRV inverter topology and validate the proposed theory. A hardware set up was developed for a 1–Ф seven level CBRV inverter topology using FPGA based pulse generation.

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Ojha, Sandeep, and Ashok Kumar Pandey. "Close Loop V/F control of Voltage Source Inverter using Sinusoidal PWM, Third Harmonic Injection PWM and Space vector PWM Method for Induction Motor." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 1 (March 1, 2016): 217. http://dx.doi.org/10.11591/ijpeds.v7.i1.pp217-224.

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The aim of this paper to presents a comparative analysis of Voltage Source Inverter using Sinusoidal Pulse Width Modulation Method, Third Harmonic Injection Pulse Width Modulation Method and Space Vector Pulse Width Modulation Two level inverter for Induction Motor. In this paper we have designed the Simulink model of Inverter for different technique. An above technique is used to reduce the Total Harmonic Distortion (THD) on the AC side of the Inverter. The Simulink model is close loop. Results are analyzed using Fast Fourier Transformation (FFT) which is for analysis of the Total Harmonic Distortion. All simulation are performed in the MATLAB Simulink / Simulink environment of MATLAB.

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Vazquez-Guzman, Gerardo, Panfilo R. Martinez-Rodriguez, Jose M. Sosa-Zuñiga, Dalyndha Aztatzi-Pluma, Diego Langarica-Cordoba, Belem Saldivar, and Rigoberto Martínez-Méndez. "Hybrid PWM Techniques for a DCM-232 Three-Phase Transformerless Inverter with Reduced Leakage Ground Current." Micromachines 13, no. 1 (December 28, 2021): 36. http://dx.doi.org/10.3390/mi13010036.

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Pulse Width Modulation (PWM) strategies are crucial for controlling DC–AC power converters. In particular, transformerless inverters require specific PWM techniques to improve efficiency and to deal with leakage ground current issues. In this paper, three hybrid PWM methods are proposed for a DCM-232 three-phase topology. These methods are based on the concepts of carrier-based PWM and space vector modulation. Calculations of time intervals for active and null vectors are performed in a conventional way, and the resulting waveforms are compared with a carrier signal. The digital signals obtained are processed using Boolean functions, generating ten signals to control the DCM-232 three-phase inverter. The performance of the three proposed PWM methods is evaluated considering the reduction in leakage ground current and efficiency. The proposed modulation techniques have relevant performances complying with international standards, which make them suitable for transformerless three-phase photovoltaic (PV) inverter markets. To validate the proposed hybrid PWM strategies, numerical simulations and experimental tests were performed.

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Udhayakumar, G., Rashmi M R, K. Patel, G. P. Ramesh, and Suresh A. "Supply Power Factor Improvement in Ozone Generator System Using Active Power Factor Correction Converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (June 1, 2015): 326. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp326-336.

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Artificial Ozone Generating system needs High Voltage, High Frequency supply. The Ozonator distorts the supply currents and henceforth affect the supply power factor. This paper presents the performance comparison of PWM inverter to Power Factor Corrected (PFC) converter with PWM inverter based High-voltage High-frequency power supply for ozone generator system. The conventional inverter has front end bridge rectifier with smoothing capacitor. It draws non-sinusoidal current from ac mains; as a result input supply has more harmonics and poor power factor. Hence, there is a continuous need for power factor improvement and reduction of line current harmonics. The proposed system has active power factor correction converter which is used to achieve sinusoidal current and improve the supply power factor. The active PFC converter with PWM inverter fed ozone generator generates more ozone output compared to the conventional inverter. Thus the proposed system has less current harmonics and better input power factor compared to the conventional system. The performance of the both inverters are compared and analyzed with the help of simulation results presented in this paper.

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Bhukya, Ravi Kumar, and P. Satish Kumar. "Simplified down sampling factor based modified SVPWM technique for cascaded inverter fed induction motor drive." International Journal of Advances in Applied Sciences 9, no. 1 (March 1, 2020): 20. http://dx.doi.org/10.11591/ijaas.v9.i1.pp20-26.

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This paper presents a rivew, investigation and performance analysis of novel down samples factor based modified space vector PWM is called clamping SVPWM technique for cascaded Multilevel Invereter fed to Induction motor drive. In this paper the reference sine wave generated as in case of conventional off set injected SVPWM technique is modified by down sampling factor the reference wave by order of 10. The performance analyses of this modulation strategies are analyzed by apply for five level, seven level, nine level and eleven level inverter. The performance analysis of cascaded inverter interms of line voltage, stator current, speed, torque and total harmonic distortion. The results are depicting that PD PWM is more effective among the four proposed PWM technique. It is observed that the CSV Pulse width modulation ensures excellent, close to optimized pulse distribution results compared to SPWM technique and also 11-level inverter beter performance in case of low THD and better foundemental output voltages comapared to 5, 7, 9-level inverter. The proposed technique has been simulated using MATLAB/SIMULINK software. This proposed technique can be applied to N-level multilevel Inverter also.

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B, Deepa, Soumya D, Suhas Havinal, Swathi Hoogar, and Srinidhi B. V. "Single Phase MOSFET Inverter Using PWM Technique." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (May 31, 2023): 729–31. http://dx.doi.org/10.22214/ijraset.2023.51610.

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Abstract: Electricity has two types which are DC (Direct Current) electricity and AC (Alternating Current) electricity. Electricity which generally used for household components is utilized AC electricity. AC power can be generated from DC electricity by using an inverter tool. The inverter has various methods of converting DC power to AC power. In this research, inverter built using full bridge configuration. Using the full bridge configuration, it is obtained more efficient results by using other configurations. The inverter designed using voltage source 12 volt battery with a capacity of 7.5 Ah. The maximum power capacity which generated by the inverter is 100 watts. To control this inverter, Arduino uno R3 microcontroller is used.

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Hadj Benali, Farouk, and Fouad Azzouz. "Comparison of Flying Capacitor Fifteen Level Inverter and Thirty Three Level Inverter PWM Control Strategies." Indonesian Journal of Electrical Engineering and Computer Science 6, no. 2 (May 1, 2017): 368. http://dx.doi.org/10.11591/ijeecs.v6.i2.pp368-378.

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In the paper two PWM control strategies of multilevel flying capacitor inverter is proposed. The study starts with a presentation of the Flying capacitor inverter and the two PWM control strategies (SPWM and Suboptimal PWM). Than a section which presents a brief recall of the triangular multicarrier PWM and the sinusoidal multicarrier PWM. A comparison between the two PWM control strategies based on the simulation results is made. The subjects of comparison are the root mean square rms of the output voltage and the total harmonic distortion THD. The obtained results have proved that the Suboptimal PWM is better than the SPWM. Simulations are carried out by PSIM program.

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Karuppusamy, P., G. Vijayakumar, and S. Sathishkumar. "Certain Investigation on Multilevel Inverters for Photovoltaic Grid Connected System." Journal of Circuits, Systems and Computers 25, no. 09 (June 21, 2016): 1650108. http://dx.doi.org/10.1142/s0218126616501085.

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This paper presents a photovoltaic (PV) system to convert the solar energy into electrical energy. DC power from PV system is converted into AC power using multilevel inverters. Cascaded H-bridge (CHB) inverter and diode clamped inverter (DCI) are used to convert variable DC power into sinusoidal AC power. Harmonic content is the important part to improve the efficiency of the inverter. Harmonics of CHB inverter and DCI are simulated and analyzed with different pulse width modulation (PWM) techniques.

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Edwin Deepak, F. X., and V. Rajasekaran. "Three phase z-source neutral point clamped inverter with multicarrier PWM technique." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 35, no. 5 (September 5, 2016): 1575–91. http://dx.doi.org/10.1108/compel-04-2016-0131.

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Purpose The purpose of this paper is to present the three phase seven-level Z-source neutral point clamped (NPC) inverter with multicarrier pulse-width modulation (PWM) technique. Despite numerous topologies and modulation methods, there is a dire need of developing PWM techniques that can be deployed in multilevel inverters. These inverters decrease the total harmonic distortion and it has a good performance for various electrical power system applications. The proposed inverter is investigated for its performance by executing it in shoot through and non-shoot through modes. Design/methodology/approach The purpose is validated through MATLAB/Simulink software platform for implementing the proposed seven-level Z-source NPC inverter outlined with multicarrier based phase disposition technique. The experimental results are verified using SPARTAN 3E FPGA controller with the same control strategy. Findings The efficiency of the proposed inverter is confirmed in terms of increased and faster conversion in the shoot-through mode. By using PDPWM technique the maximum boost gain is achieved with lower modulation index. High control of DC voltage is obtained with only one DC voltage source and one Z network. Originality/value Three phase multilevel inverters are widely used in improving the output voltage quality and reducing the encountered electromagnetic interference in electronic device or circuitry. They are employed in medium and high –power applications to attain increased power ratings while decreasing the switching losses. The performance results shown in this paper will satisfy the above needs of usage in certain applications and less switching losses.

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D, Srinivasa Rao, Sandhya Rani MN, Sarfaraz Nawaz Syed, and Suresh Kumar Tummala. "Gate Driver Circuit Design, PWM signal generation using FEZ Panda III and Arduino for Inverter." E3S Web of Conferences 87 (2019): 01003. http://dx.doi.org/10.1051/e3sconf/20198701003.

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This paper presents the gate driver circuit design and PWM signal generation using FEZ panda III and Arduino boards for Inverter. FEZ panda III works on .net micro framework and all its programming, debugging features are available through Microsoft’s Visual studio whereas Arduino features are available through Arduino software. Inverters are used in various applications like in motor drives and solar and wind power applications. This paper is commenced by basic understanding of need of gate driver circuit for inverter and different types of PWM techniques for generating gate signals for inverter. Simulation of SPWM inverter in both open loop and closed loop operation is done and its respective gate voltage waveforms are studied and later hardware implementation of gate driver circuit using TLP250H IC is carried out and gate voltages at different duty cycles is studied with the help of FEZ Panda III and Arduino boards.

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Hamza, Amar, Sara Altahir, and Xiangwu Yan. "Synchronverter Control for Parallel Operation of Cascaded H-Bridge Inverter." Indonesian Journal of Electrical Engineering and Computer Science 2, no. 1 (April 1, 2016): 107. http://dx.doi.org/10.11591/ijeecs.v2.i1.pp107-114.

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A 21-levels cascaded H-bridge multilevel inverter topology based on three-phase voltage source inverter has been proposed as a superior replacement for conventional two-level in high voltage applications. In this work we have presented the usage of the new technique called virtual synchronous generator based synchronverter model to operate the multilevel inverter as synchronous generator, and to share active and reactive power automatically in case of parallel operated inverters of the same type. Carrier-based PWM is used to control each phase leg of the cascaded H-bridge multilevel inverter. This carrier-based PWM scheme is derived from the carrier phase disposition pulse width modulation strategy. By aid of MATLAB/Simulink package a simulation experiment is established to verify the performance of the proposed technique.

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Chen, Jyh Wei, and Huan Fu Lin. "Design of Grid Connected Parallel Inverters with Interleaved Phase Shift by Using CAN Bus." Advanced Materials Research 591-593 (November 2012): 1579–84. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.1579.

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A grid-connected parallel inverter with interleaved phase shift is proposed in this paper. The synchronous are generated by the master module to achieve interleaving phase shift PWM for the parallel inverters connected to grid-tied system that make the inverter to output current to the power line and share the load. TI TMS320F2812 DSP is used for system feedback control with voltage and current by using A/D converters to generate the output current close to sine wave. The expected output current values are determined by the master module and transmitted via CAN (Control area network) between inverter modules. The grid-tied system uses zero-voltage-detection circuit to synchronize the inverter currents with grid voltage. For each switching period, PWM voltage of two inverters are interleaved to reduce the total output current ripple so that the switching frequency can be reduced and the power system EMI problem can be alleviated as well. The experiment results are provided to verify the performance of the proposed system to reduce output current harmonic distortion.

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Jayakumar, Vinoth, Bharatiraja C, Santhakumar C, and Josiah Lange Munda. "Performance Analysis of Five-Phase NPC MLI with Phase Shifting Carrier Pulse Width Modulation." ECS Transactions 107, no. 1 (April 24, 2022): 7581–88. http://dx.doi.org/10.1149/10701.7581ecst.

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The five-phase loads with Multi-Level Inverters (MLI) are preferred by industries in high and medium power applications due to lower switching loss, voltage stress across switches, etc. The controlling of a five-phase motor drive is done by Pulse Width Modulation (PWM) techniques. This paper discusses different multi carrier PWM techniques, such as Level Shifting Carrier (LSC) PWM and Phase Shifting Carrier (PSC) PWM techniques available for controlling the inverter drive. The simulation is carried out for all PWM techniques and load voltage, voltage THD, Common Mode Voltage (CMV), and DC-link voltages are noted and compared among the PWM techniques.

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Jeevananthan, S., R. Nandhakumar, and P. Dananjayan. "Inverted sine carrier for fundamental fortification in PWM inverters and FPGA based implementations." Serbian Journal of Electrical Engineering 4, no. 2 (2007): 171–87. http://dx.doi.org/10.2298/sjee0702171j.

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This paper deals with a novel natural sampled pulse width modulation (PWM) switching strategy for voltage source inverter through carrier modification. The proposed inverted sine carrier PWM (ISCPWM) method, which uses the conventional sinusoidal reference signal and an inverted sine carrier, has a better spectral quality and a higher fundamental component compared to the conventional sinusoidal PWM (SPWM) without any pulse dropping. The ISCPWM strategy enhances the fundamental output voltage particularly at lower modulation index ranges while keeping the total harmonic distortion (THD) lower without involving changes in device switching losses. The presented mathematical preliminaries for both SPWM and ISCPWM give a conceptual understanding and a comparison of the strategies. The detailed comparison of the harmonic content and fundamental component of the ISCPWM output for different values of modulation index with the results obtained for the SPWM is also presented. Finally, the proposed modulator has been implemented in field programmable gate array (FPGA- Xilinx Spartan 3) and tested with the proto-type inverter.

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Hossameldin, Abdelsalam, Ibrahim, and Williams. "Enhanced Performance Modified Discontinuous PWM Technique for Three-Phase Z-Source Inverter." Energies 13, no. 3 (January 26, 2020): 578. http://dx.doi.org/10.3390/en13030578.

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Various industrial applications require a voltage conversion stage from DC to AC. Among them, commercial renewable energy systems (RES) need a voltage buck and/or boost stage for islanded/grid connected operation. Despite the excellent performance offered by conventional two-stage converter systems (dc–dc followed by dc–ac stages), the need for a single-stage conversion stage is attracting more interest for cost and size reduction reasons. Although voltage source inverters (VSIs) are voltage buck-only converters, single stage current source inverters (CSIs) can offer voltage boost features, although at the penalty of using a large DC-link inductor. Boost inverters are a good candidate with the demerit of complicated control strategies. The impedance source (Z-source) inverter is a high-performance competitor as it offers voltage buck/boost in addition to a reduced passive component size. Several pulse width modulation (PWM) techniques have been presented in the literature for three-phase Z-source inverters. Various common drawbacks are annotated, especially the non-linear behavior at low modulation indices and the famous trade-off between the operating range and the converter switches’ voltage stress. In this paper, a modified discontinuous PWM technique is proposed for a three-phase z-source inverter offering: (i) smooth voltage gain variation, (ii) a wide operating range, (iii) reduced voltage stress, and (iv) improved total harmonic distortion (THD). Simulation, in addition to experimental results at various operating conditions, validated the proposed PWM technique’s superior performance compared to the conventional PWM techniques.

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Hidayat, Ikhsan, Al Mahdali, and Moh Afandy. "Analisis Perbandingan Inverter Satu Phasa PWM dan SPWM dengan Trafo." Jambura Journal of Electrical and Electronics Engineering 4, no. 1 (January 9, 2022): 27–32. http://dx.doi.org/10.37905/jjeee.v4i1.11900.

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Riset ini membandingkan masukan sinyal PWM dan SPWM untuk mendapatkan THD yang rendah, dan juga terkait efek dari teknik modulasi dan jumlah pulsa pada disipasi daya rendah yang terdapat pada inverter satu phasa. Inverter satu phasa diberikan masukan pulsa menggunakan PWM (Pulse Width Modulation), dan SPWM (Sinusoidal Pulse Width Modulation) dalam bentuk gelombang persegi (kotak) yang dipasangkan dengan filter LCL yang sesuai, kemudian menghasilkan desain rangkaian inverter yang memiliki THD (Total Harmonic Distortion) yang rendah dan efisiensi tinggi. Transformator digunakan untuk meningkatkan tegangan sumber masukan yang semula 48 Volt menjadi 220Volt (Untuk alat elektronik skala rumahan) juga disebutkan dalam penelitian ini. Hasil percobaan simulasi dari analisis perbandingan antara inverter satu phasa PWM dengan inverter satu phasa SPWM maka didapatkan bahwa model inverter teknik PWM (switching gelombang kotak) dapat meminimalisir harmonisa hingga mendekati 1.8 %.

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Shriwastava, Rakesh, Sonali Gosavi, Shridhar S. Khule, Somnath Hadpe, and Mohan P. Thakare. "A novel PWM technique for reduced switch count multilevel inverter in renewable power applications." International Journal of Applied Power Engineering (IJAPE) 12, no. 1 (March 1, 2023): 1. http://dx.doi.org/10.11591/ijape.v12.i1.pp1-12.

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This paper described a novel pulse width modulation (PWM) technique in reduced switch count multilevel inverter (MLI) for renewable power applications. Therefore, the proposed technique finds a better solution in the multilevel inverters used for improving power quality, efficiency and reduction of switching and conduction losses. It produces a smoother sinusoidal output waveform with reduced total harmonic distortion (THD) using different modulation technique. The novel PWM technique consists of nearest level control (NLC) and level shift pulse width modulation (LSPWM). Normally semiconducting devices are added for increasing number of levels. It affects the power quality and efficiency due to losses. In this work, MLI topology with reduced number of switches count for NLC and LSPWM is presented. The single-phase and three-phase inverter configuration is used in proposed mythology. Detailed simulation results for 7-level inverter of single and three-phase inverters are presented in this paper. It is observed that NLC method is better efficiency and reduced THD than LSPWM for better utilization in renewable power applications.

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Journal articles on the topic 'PWM Inverter'

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