Journal articles: 'Inverter mode'

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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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Ling, Meng, Jin Sha, Chen Huang, and Quan Ya Lv. "Grid-Connected Micro-Inverter Systems Based on Mode Selector." Applied Mechanics and Materials 260-261 (December 2012): 17–21. http://dx.doi.org/10.4028/www.scientific.net/amm.260-261.17.

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This paper briefly introduces the principles and structure of grid-connected solar micro-inverter system. Depending on different input solar power conditions, one novel method is proposed to generate the connection mode between solar panel group and micro-inverter group. Compared with existed technology, the proposed technical solution can not only enlarge the operating voltage range of the grid-connected solar micro-inverter system, but also increase the total conversion efficiency of micro-inverters.

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Li, Ming, Xing Zhang, and Wei Zhao. "A Novel Stability Improvement Strategy for a Multi-Inverter System in a Weak Grid Utilizing Dual-Mode Control." Energies 11, no. 8 (August 17, 2018): 2144. http://dx.doi.org/10.3390/en11082144.

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Due to the increasing penetration of distributed generations (DGS) and non-negligible grid impedance, the instability problem of the multi-inverter system operating in current source mode (CSM) is becoming serious. In this paper, a closed-loop transfer function model of such a multi-inverter system is established, by which it is concluded that output current resonance will occur with the increase in the grid impedance. In order to address this problem, this paper presents a novel dual-mode control scheme of multiple inverters: one inverter operating in CSM will be alternated into voltage source mode (VSM) if the grid impedance is high. It is theoretically proved that the coupling between the inverters and the resonance in the output current can be suppressed effectively with the proposed scheme. Finally, the validity of the proposed theory is demonstrated by extensive simulations and experiments.

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Che, Yanbo, Guojian Liu, Jianmei Xu, and Yuancheng Zhao. "Modeling and Analysis of 12-Pulse Inverter in Shipboard or Aircraft." Polish Maritime Research 24, s3 (November 27, 2017): 136–42. http://dx.doi.org/10.1515/pomr-2017-0116.

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Abstract With the development of DC distribution system within the isolated power system of a ship or an aircraft, more constant frequency loads will be supplied by inverters connected to DC main bus. In the operating mode conversion process of an isolated power system, inverters will inevitably suffer from serious disturbance and affect the stability of the system. Therefore, it is important to establish a model of the inverter that reflects its dynamic characteristics and based on which to conduct the stability analysis. This paper proposes a 12-pulse inverter model based on the generalized state space averaging (GSSA) method. This model can overcome the limitations of 12-pulse inverter state space averaging (SSA) model in transient analysis with good accuracy and fast analysis ability effectively. Three kinds of models for a 12-pulse aircraft inverter are built in MATLAB, namely GSSA model, SSA model and detail device model. The simulation results show the high accuracy of GSSA model in stability analysis. This study provides an effective analytical tool for stability analysis of 12-pulse inverter and also provides a reference for inverter modeling research of isolated power system such as in aircraft or ship.

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Popov, Evgeniy, and Nikolay Hinov. "Investigating the steady state mode of power inverters for induction heating." Facta universitatis - series: Electronics and Energetics 31, no. 1 (2018): 41–50. http://dx.doi.org/10.2298/fuee1801041p.

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This article formulates the new unified interpretation of the analysis of electromagnetic processes in the autonomous (usually resonant) inverters with power circuits having a serial RLC configuration either with or without free wheeling diodes. The investigation starts with clarifying the parameters of the inverter circuit by bringing the fourth order power network into such of a second order in a normalized form. On this basis the novel compendious relationships between the most important internal inverter parameters are given. A MATLAB program calculates and displays the frequency characteristics of both types of inverters and simulates their steady state. The results from characteristics and simulation confirm each other in many ways. They were also proved experimentally. The whole processed information helps better understanding and organizing intelligent design, measurement and control of the inverters for technological applications (induction heating).

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Zhang, Baoge, and Deyu Hong. "Research on an Improved Single-Phase Unisolated Grid-Connected Photovoltaic Inverter." European Journal of Electrical Engineering 23, no. 2 (April 23, 2021): 123–30. http://dx.doi.org/10.18280/ejee.230205.

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An improved single-phase unisolated grid-connected photovoltaic inverter topology is proposed to solve the common mode leakage current problem of unisolated grid-connected photovoltaic inverters. By analyzing the topology structure and voltage clamping principle of the improved inverter, the topology can maintain the same low input voltage as the full-bridge inverter, and ensure that the common-mode voltage in the continuation mode is clamped to the midpoint voltage of the bus, so as to effectively reduce the common-mode leakage current caused by the common-mode voltage suspension in the continuation mode. Moreover, the common-mode leakage current of the improved topology is smaller than that of the traditional H6-2D topology at similar conversion efficiency. The simulation results on MATLAB /Simulink platform show that the topology is feasible and effective.

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Li, Ya Jing, and Wei Dong Geng. "Design of Boundary Mode Flyback Control Auxiliary Power Supply of a PV Inverter." Applied Mechanics and Materials 291-294 (February 2013): 121–26. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.121.

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This paper analyzes the principle of boundary mode flyback topology, presents a five-output auxiliary power supply of 3KW solar power inverter without the optocoupler feedback regulator circuit. The circuit has the characteristics of a simple structure, low cost, high efficiency and high reliability . The multi-output auxiliary power supply of the PV inverter schematic and a high frequency flyback transformer detail design are given. This power supply has been already used in an inverter. The experiment results prove that the auxiliary power supply has a stable work state, a low output ripple, a transformer without fever phenomenon, and meet the requirements of Solar power inverters.

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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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Han, Hua, Chao Luo, Xiaochao Hou, Mei Su, Wenbin Yuan, Zhangjie Liu, and Josep Guerrero. "A Cost-Effective Decentralized Control for AC-Stacked Photovoltaic Inverters." Energies 11, no. 9 (August 28, 2018): 2262. http://dx.doi.org/10.3390/en11092262.

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For an AC-stacked photovoltaic (PV) inverter system with N cascaded inverters, existing control methods require at least N communication links to acquire the grid synchronization signal. In this paper, a novel decentralized control is proposed. For N inverters, only one inverter nearest the point of common coupling (PCC) needs a communication link to acquire the grid voltage phase and all other N − 1 inverters use only local measured information to achieved fully decentralized local control. Specifically, one inverter with a communication link utilizes the grid voltage phase and adopts current control mode to achieve a required power factor (PF). All other inverters need only local information without communication links and adopt voltage control mode to achieve maximum power point tracking (MPPT) and self-synchronization with grid voltage. Compared with existing methods, the communication link and complexity is greatly reduced, thus improved reliability and reduced communication costs are achieved. The effectiveness of the proposed control is verified by simulation tests.

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Rahman, Mohammad Halimur, Md Abdul Mannan, and Mohd Muinul Haq Mamun. "Design and Implementation of a Three-Phase Inverter Operated with different Conduction Modes with Automatic Powerfactor Improvement." AIUB Journal of Science and Engineering (AJSE) 18, no. 2 (August 31, 2019): 44–48. http://dx.doi.org/10.53799/ajse.v18i2.39.

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Three phase inverters are widely used to control different industrial process. Power electronics based inverters are very popular for fast response and precise control. In this paper an IGBT based three phase power inverter is proposed. Conventional three different conduction modes of 1200, 1500 and 1800 have been adopted. Micro-controller based firing pulse generation circuit using a special multi-winding transformer and opt-coupler to apply isolated firing pulses for each IGBT has been developed and tested successfully. Simulation and test results of the inverter for three phase resistive as well as inductive loads have been presented. The test results are found to be in good agreement with the simulation outcome and also with the theoretical analysis. The main objective is to make an inverter with selectable conduction modes so that specific mode can be defined for resistive or reactive loads. The required correction for PFI is done by adjusting the percentage of duty cycle firing pulse of IGBT to control the capacitive current. The result of the experiment can be used to design PFI (Power Factor Improvement) units for the small industries and domestic users as well. In this paper a three phase inverter of multiple conduction mode with a switching capacitor power factor improvement (PFI) system is analyzed.

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Nguyen, Vinh-Quan, and QuangTho Tran. "Reduction of common mode voltage for cascaded multilevel inverters using phase shift keying technique." Indonesian Journal of Electrical Engineering and Computer Science 21, no. 2 (February 1, 2021): 691. http://dx.doi.org/10.11591/ijeecs.v21.i2.pp691-706.

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Demand of cascaded multilevel inverters in industries of electric drives and renewable energy is increasing due to their large-scale capacity and high voltage. The modulation technique of inverters significantly affects the power quality of the inverter output voltage. This paper proposes a new method of carrier wave modulation using the phase shift keying technique for cascaded multilevel inverters. The phase of a constant frequency carrier wave is changed at an accurate time by an input sinusoidal control signal. This modulation technique is simply implemented and only needs a small memory. It also helps reduce the common mode voltage of inverters in order to suppress the output voltage harmonics. Moreover, the ability to reduce switching count also helps the inverters decrease switching loss. The simulated and experienced results on a cascaded 9-level 3-phase inverter and an F28379D DSP kit have validated the performance of the proposed technique compared with that of the APOD and POD methods.

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Sundar, D. John, and M. Senthil Kumaran. "Common mode behavior in grid connected DC and AC decoupled PV Inverter topologies." Archives of Electrical Engineering 65, no. 3 (September 1, 2016): 481–93. http://dx.doi.org/10.1515/aee-2016-0035.

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Abstract The transformer-less grid connected inverters are gaining more popularity due to their high efficiency, very low ground leakage current and economic feasibility especially in photovoltaic systems. The major issue which surfaces these systems is that of common mode leakage current which arises due to the absence of an electrical transformer connected between the inverter and the utility grid. Several topologies have evolved to reduce the impact of common mode leakage current and a majority of them have succeeded in eliminating the impacts and have well kept them within the limits of grid standards. This paper compares and analyses the impact of the common mode leakage current for four popular inverter configurations through simulation of the topologies such as H5, H6, HERIC and FBZVR inverters.

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B, Sathyaprabakaran, Subrata Paul, and Debashis Chatterjee. "A New strategy for on- line Droop adjustment for Microgrid connected DGs." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 139. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp139-149.

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This paper proposes a simple and effective control technique for interconnection of DG resources to the power grid via interfacing converters based on Phase locked loop (PLL) and Droop control. The behaviour of a Microgrid (MG) system during the transition from islanded mode to grid-connected mode of operation has been studied. A dynamic phase shifted PLL technique is locally designed for generating phase reference of each inverter. The phase angle between filter capacitor voltage vector and d-axis is dynamically adjusted with the change in q-axis inverter current to generate the phase reference of each inverter. During fluctuations in load capacity, the grid-connected system must be able to supply balanced power from the utility grid side and micro-grid side. Therefore, droop control is implemented to maintain a balanced power sharing. The inverter operates in voltage control mode in order to control the filter capacitor voltage. An adjusted droop control method for equivalent load sharing of parallel connected Inverters, without any communication between individual inverters, has been presented. The control loops are tested with aid of MATLAB Simulink tool during several operating conditions.

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Karam, K., M. Badawi El Najjar, and M. El Hassan. "Three-Phase Transformerless Inverter for Photovoltaic Grid Connected System with Zero Common Mode Noise." Renewable Energy and Power Quality Journal 19 (September 2021): 137–42. http://dx.doi.org/10.24084/repqj19.239.

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The pervasion of transformerless grid connected photovoltaic (PV) inverters has triggered the concerns of many researchers since it can induce power quality problems. In these types of applications, the generation of common mode (CM) leakage current is one of the major factors that affects the reliability of the overall design. In single-phase systems, the concept of the common ground between the PV negative terminal and the neutral point of the grid is the only topology that “totally” cancels this CM noise. However, none of the existing three-phase inverter techniques is able to totally remove it. Therefore, this paper proposes a three-phase PV inverter based on the concept applied in the single-phase system in order to achieve, for the first time, a zero CM noise in three-phase grid-connected PV applications. The proposed inverter is simulated with a PV array, appropriate modulation technique, corresponding inverter controller, and a three-phase Y-connected alternating current (AC) grid voltage. The simulation of the overall system is done using Matlab/Simulink software. As compared with results of existing three-phase topologies, this is the only three-phase transformerless PV inverter technique that offers generation of multilevel output, total elimination of leakage current flow, simple inverter structure, and uncomplicated modulation technique.

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Chaturvedi, Pradyumn, Shailendra Jain, and Pramod Agarwal. "Carrier-Based Common Mode Voltage Control Techniques in Three-Level Diode-Clamped Inverter." Advances in Power Electronics 2012 (September 19, 2012): 1–12. http://dx.doi.org/10.1155/2012/327157.

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Switching converters are used in electric drive applications to produce variable voltage, variable frequency supply which generates harmful large dv/dt and high-frequency common mode voltages (CMV). Multilevel inverters generate lower CMV as compared to conventional two-level inverters. This paper presents simple carrier-based technique to control the common mode voltages in multilevel inverters using different structures of sine-triangle comparison method such as phase disposition (PD), phase opposition disposition (POD) by adding common mode voltage offset signal to actual reference voltage signal. This paper also presented the method to optimize the magnitude of this offset signal to reduce CMV and total harmonic distortion in inverter output voltage. The presented techniques give comparable performance as obtained in complex space vector-based control strategy, in terms of number of commutations, magnitude, and rate of change of CMV and harmonic profile of inverter output voltage. Simulation and experimental results presented confirm the effectiveness of the proposed techniques to control the common mode voltages.

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Li, Xing Qiao, and Xiang Yang Zhao. "Research on Island Microgrid Master-Slave Mode." Applied Mechanics and Materials 738-739 (March 2015): 1026–29. http://dx.doi.org/10.4028/www.scientific.net/amm.738-739.1026.

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Based on island microgrid, using master-slave structure. VF inverter works as master, ensuring the stability of the voltage and frequency of microgird, PQ inverter works as slave, maximize the use of renewable energy sources. Design the controller for VF and PQ inverter respectively. PQ inverter use single current loop, VF inverter use voltage outer loop and current inner loop. Discuss the design of controller in detail. VF inverter and PQ inverter working in parallel in master-slave island microgrid. Simulation runs in Matlab Simulink environment, the result turns out this structure and design is workable and stable.

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Madasamy, P., V. Suresh Kumar, P. Sanjeevikumar, Jens Bo Holm-Nielsen, Eklas Hosain, and C. Bharatiraja. "A Three-Phase Transformerless T-Type- NPC-MLI for Grid Connected PV Systems with Common-Mode Leakage Current Mitigation." Energies 12, no. 12 (June 24, 2019): 2434. http://dx.doi.org/10.3390/en12122434.

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DC to AC inverters are the well-known and improved in various kinds photovoltaic (PV) and gird tied systems. However, these inverters are require interfacing transformers to be synchronized with the grid-connected system. Therefore, the system is bulky and not economy. The transformerless inverter (TLI) topologies and its grid interface techniques are increasingly engrossed for the benefit of high efficiency, reliability, and low cost. The main concern in the TL inverters is common mode voltage (CMV), which causes the switching-frequency leakage current, grid interface concerns and exaggerates the EMI problems. The single-phase inverter two-level topologies are well developed with additional switches and components for eliminating the CMV. Multilevel inverters (MLIs) based grid connected transformerless inverter topology is being researched to avail additional benefits from MLI, even through that are trust topologies presented in the literature. With the above aim, this paper has proposed three -phase three-level T type NP-MLI (TNP-MLI) topology with transformerless PV grid connected proficiency. The CM leakage current should handle over mitigating CMV through removing unwanted switching events in the inverter pulse width modulation (PWM). This paper is proposes PV connected T type NP-MLI interface with three-phase grid connected system with the help of improved space vector modulation (SVM) technique to mitigate the CM leakage current to overcome the above said requests on the PV tied TL grid connected system. This proposed the SVM technique to mitigate the CM leakage current by selecting only mediums, and zero vectors with suitable current control method in order to maintain the inverter current and grid interface requirements. The proposed PV tied TNP-MLI offering higher efficiency, lower breakdown voltage on the devices, smaller THD of output voltage, good reliability, and long life span. The paper also investigated the CM leakage currents envisage and behavior for the three-phase MLI through the inverter switching function, which is not discussed before. The proposed SVM on TL-TNP-MLI offers the reliable PV grid interface with very low switching-frequency leakage current (200mA) for all the PV and inverter operation conditions. The feasibility and effectiveness of the TLI and its control strategy is confirmed through the MATLAB/Simulink simulation model directly as compared with 2kW roof top PV plant connected TL-TNP-MLI experimentation, showing good accordance with theoretical investigation. The simulation and experimental results are demonstrated and presented in the good stability of steady state and dynamics performances. The proposed inverter reduces the cost of grid interface transformer, harmonics filter, and CMV suppressions choke.

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Guo, Xiaoqiang, Ran He, and Mehdi Narimani. "Modeling and Analysis of New Multilevel Inverter for Solar Photovoltaic Power Plant." International Journal of Photoenergy 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/4063167.

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Solar photovoltaic (PV) power plant is an effective way to utilize the renewable energy sources. EMI is one of the major concerns in PV power plant. Typically, the multilevel inverters are used in high voltage PV power plant. However, the conventional multilevel inverters require more semiconductors, which complicate the circuit structure and control algorithm. In this paper, a novel five-level inverter is introduced for the high voltage PV power plant applications. The model of the inverter is analyzed. With the redundant switching states, a new modulation strategy is proposed to reduce the common-mode voltage and EMI. The proposed approach is able to eliminate the common-mode voltage; meanwhile it has the capability of balancing the capacitor voltages. The cosimulation tests with the Matlab/Simulink and S-function are carried out. The results verify the effectiveness of the proposed method.

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Imtiaz, Bisma, Imran Zafar, and Cui Yuanhui. "Modelling of an Optimized Microgrid Model by Integrating DG Distributed Generation Sources to IEEE 13 Bus System." European Journal of Electrical Engineering and Computer Science 5, no. 2 (March 24, 2021): 18–25. http://dx.doi.org/10.24018/ejece.2021.5.2.309.

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Due to the rapid increase in energy demand with depleting conventional sources, the world’s interest is moving towards renewable energy sources. Microgrid provides easy and reliable integration of distributed generation (DG) units based on renewable energy sources to the grid. The DG’s are usually integrated to microgrid through inverters. For a reliable operation of microgrid, it must have to operate in grid connected as well as isolated mode. Due to sudden mode change, performance of the DG inverter system will be compromised. Design and simulation of an optimized microgrid model in MATLAB/Simulink is presented in this work. The goal of the designed model is to integrate the inverter-interfaced DG’s to the microgrid in an efficient manner. The IEEE 13 bus test feeder has been converted to a microgrid by integration of DG’s including diesel engine generator, photovoltaic (PV) block and battery. The main feature of the designed MG model is its optimization in both operated modes to ensure the high reliability. For reliable interconnection of designed MG model to the power grid, a control scheme for DG inverter system based on PI controllers and DQ-PLL (phase-locked loop) has been designed. This designed scheme provides constant voltage in isolated mode and constant currents in grid connected mode. For power quality improvement, the regulation of harmonic current insertion has been performed using LCL filter. The performance of the designed MG model has been evaluated from the simulation results in MATLAB/ Simulink.

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Kabalyk, Iurii, and Alina Gutsol. "Simulation of control and measurement systems for dc-ac inverter." E3S Web of Conferences 91 (2019): 01008. http://dx.doi.org/10.1051/e3sconf/20199101008.

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Computer simulation can reduce the cost of creating new technical devicesand modernization of existing ones.This article includes the model control system and measurement system for DC-AC inverter. Control systems for two-, three- and four-level inverters are considered.The models are made by means of computer simulation in the program OrCAD Capture. Each model is built with the help of universal blocks, which are found in other computer simulation programs.The results of research on the considered models are given.These results show the dependence of the inverter output voltage parameters on the change of the control signals mode.

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Karakasli, Vefa, Gerd Griepentrog, Junsheng Wei, and Danil Drozhzhin. "Mixed-Mode Effect on Motor Common Mode Current." Applied Computational Electromagnetics Society 35, no. 11 (February 5, 2021): 1374–75. http://dx.doi.org/10.47037/2020.aces.j.351156.

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This paper presents the mixed-mode effect on motor common mode current (CMC) in an adjustable speed drive (ASD). It is expected that the motor CMC is lower than inverter output CMC. However, the measurement result of the ASD shows that the AC motor input CMC is higher than the inverter output CMC in a frequency range. By using a mixed-mode (MM) 6-port networks, it is proven that the AC motor input CMC is higher due to an MM CMC which is generated from differential mode current.

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Zebbadji, Tahar, Seddik Hadji, and Rachid Ibtiouen. "Line and Grid Impedance Impact on the Performances of a Parallel Connected Modular Inverter System." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 1 (March 1, 2015): 100. http://dx.doi.org/10.11591/ijpeds.v6.i1.pp100-108.

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With the rising fuel cost, increasing demand of power and the concerns for global climate change, the use of clean energy make the connection of power electronics building bloc in the heart of the current research. The high output current applications make the parallel connection of modular inverters to be a solution for the use of low power building block inverters where the output power cannot be handled by a single inverter configuration. In this context, average-modeling using average phase–leg technique allows the n-parallel connected inverters to be analyzed accurately and rapidly without requiring the complexity of the full switched inverter topology. The obtained analytical solution along with the equivalent circuit model makes easier the design of the control loop. The analytical solution of the n-parallel connected inverters shows the impact of the line and grid impedance on the performance of the overall system. The impact of this coupling has to be investigated such that the main feature of paralleling inverters is guaranteed and that the inverter mode of operation will not be compromised. The main advantage of paralleling inverters can be lost for a certain coupling impedance considerations.

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Zadeh, Ali Kalantar, Leila Ilan Kashkooli, and Seyed Alireza Mirzaee. "Designing a power inverter and comparing back-stepping, sliding-mode and fuzzy controllers for a single-phase inverter in an emergency power supply." Ciência e Natura 37 (December 19, 2015): 175. http://dx.doi.org/10.5902/2179460x20769.

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In recent years, there has been a high demand for high-power inverters. Unlike a rectifier, an inverter with a high-power electronic oscillator is able to convert direct current (DC) into alternating current (AC) in different forms. Regarding this point, the current paper presents an analysis and design of fuzzy logic control (FLC) applied to an inverter of a single-phase voltage source using LC filter and voltage sensor. Also, three modes of inverter voltage non-linear control (back-stepping, sliding and fuzzy modes) have been simulated and compared. The results of simulation indicated that the suggested FLC could attenuate and reduce total harmonic distortion (THD) under linear loading conditions.

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Arsent'ev, Grigoriy. "IMPROVEMENT OF CHARACTERISTICS OF THE WIDE-PULSE INVERTER WHEN WORKING FOR ASYNCHRONOUS LOAD." Bulletin of the Angarsk State Technical University 1, no. 12 (December 18, 2018): 8–12. http://dx.doi.org/10.36629/2686-777x-2018-1-12-8-12.

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ь частоты, моделирование. Abstract. The urgency of the problem of studying the operation of inverters in the frequency Converter is shown. The characteristics of the pulse-width inverter when working on an asynchronous load are obtained. According to the results of research, conclusions are made to determine the relationship between the form of output current and current in the DC voltage link and the mode of operation of the asynchronous motor. It is determined that the inverter has the greatest influence on the internal and output characteristics of the frequency Converter. the Converter has an inverter.

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Wei, Xinwei, Xiaonan Zhu, Wenyuan Zhang, Hanzhe Wang, Hongliang Wang, An Luo, and Minying Li. "Multilayer Model Predictive Control for a Voltage Mode Digital Power Amplifier." Electronics 10, no. 14 (July 15, 2021): 1699. http://dx.doi.org/10.3390/electronics10141699.

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The application of the finite control set model predictive control to cascaded inverters is severely limited by its computational complexity. In this paper, a load observer based multilayer model predictive control is proposed for the voltage mode digital power amplifier employing cascaded full-bridge neutral point clamped inverter, which can avoid the use of load current sensor and greatly reduce the controller computation without affecting its dynamic performance. The discrete mathematical model of the voltage mode digital power amplifier employing cascaded full-bridge neutral point clamped inverter is established with filter inductor current and filter capacitor voltage as state variables. A load current observer is designed based on this to avoid the use of load current observer. Based on the discrete model and the observed load current, the upper layer of the multilayer model predictive control determines the optimal level that minimizes the cost function. The middle layer allocates the optimal level to each submodule in order to achieve capacitor voltage balancing. The lower layer determines the switching state of each submodule in order to reduce switching actions. Finally, the experimental results based on the designed nine-level prototype show that the develop multilayer model predictive control lead to acceptable steady state, dynamic and robust performance, with only 1.37% of the run time of the traditional model predictive control.

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Ahn, Kangsoon, Yongseung Oh, Wonseok Oh, and Kyumin Cho. "Independent Upper- and Lower-Arm Switching Scheme Based on Reference Current Polarity for Three-Level NPC Inverters." Energies 14, no. 17 (September 4, 2021): 5535. http://dx.doi.org/10.3390/en14175535.

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This study presents a novel switching scheme for three-level neutral point clamped (NPC) inverters. The proposed switching method independently drives the upper- and lower-arm elements of the inverter based on the polarity information of the reference current. The proposed switching scheme does not require the inclusion of dead-time for each switching, except when the current polarity changes. Therefore, unlike the conventional inverter switching method, dead-time compensation is not needed, and the possibility of an arm-short accident is prevented. In this study, a switching procedure is detailed, and the operation mode analysis of the proposed switching scheme is presented. The effectiveness of the proposed switching method is verified experimentally by application to a grid-connected inverter that requires inverter current control.

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Raja Mohamed, S., P. Aruna Jeyanthy, and D. Devaraj. "Hysteresis-based Voltage and Current Control Techniques for Grid Connected Solar Photovoltaic Systems: Comparative Study." International Journal of Electrical and Computer Engineering (IJECE) 8, no. 5 (October 1, 2018): 2671. http://dx.doi.org/10.11591/ijece.v8i5.pp2671-2681.

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Solar PV system development and integration with existing grid is very fast in recent years all over the world, as they require limited maintenance, pollution free and simple structure. When observing the factors affecting the performance of the grid connected solar photovoltaic system, the inverter output voltage with harmonics add with the harmonics generated due to the non-linear loads, retain a bigger challenge to maintain power quality in the grid. To maintain grid power quality, better inverter control technique should be developed. This paper presents the two control techniques for grid-tied inverters. This study developed the hysteresis controller for the inverter. Hysteresis controller used in this work two way (i) Voltage control mode (ii) Current control mode. Matlab/Simulink model is developed for the proposed system. Further the study presents the comparative evaluation of the performance of both control techniques based on the percentage of total harmonic distortion (THD) with the limits specified by the standards such as IEEE 1547 and IEC 61727 and IEEE Std 519-2014

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SHAVELKIN, A. A., and YE YU STANOVSKYI. "Multifunctional converter unit with a series connection of inverters for the combined electric power system of a local object with a photovoltaic battery." Journal of Electrical and power engineering 14, no. 1 (February 27, 2020): 74–80. http://dx.doi.org/10.31474/2074-2630-2020-1-74-80.

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The improvement of the structure is considered and the justification of the parameters of a multifunctional converter unit with a series connection of inverters for a combined electric power system of a local object with a photovoltaic battery is performed. There are obtained dependences of the amplitude of the ripple of the output current of the inverters, the error for fundamental harmonic, and the relation for determining the values of the inverter input voltage, reactor inductance, and PWM frequency according to the mains voltage and the maximum value of the inverter current, when it combines the functions of the active power filter. The single-channel control system structure with a slave current control loop with a common channel of current deviation for inverters has been improved. The external controller is determined by the operating mode: when working in parallel with the network, it is the current (voltage) controller of the photovoltaic battery, which under current conditions has less power; in the absence of energy production - the input voltage controller of one of the inverters; in standalone mode - load voltage controller.

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Mangroliya, Divyeshkumar G., and Girish V. Jadhav. "Implementation On Three Phase Voltage Source Inverter With 1500 Conduction Mode." Indian Journal of Applied Research 1, no. 12 (October 1, 2011): 89–90. http://dx.doi.org/10.15373/2249555x/sep2012/32.

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Sahoo, N. C., R. Vejian, and R. Gobbi. "Using PSpice for Teaching Output Current Control in D.C.-A.C. Inverters to Undergraduate Students." International Journal of Electrical Engineering & Education 45, no. 4 (October 2008): 356–70. http://dx.doi.org/10.7227/ijeee.45.4.8.

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In the present day technology of power semiconductor drives, d.c.-a.c. switch-mode voltage source inverters are widely used in a.c. motor servo drives. In these applications, the motor phase currents need to be controlled for high performance. Thus, the prime control issue is to obtain the switching signals for the inverter switches in order to control/regulate the inverter output current. There are various standard ways to derive the switching signals for the inverter. Undergraduate students of electrical engineering should know these basics and get hands-on experience of the inverter current control techniques while taking a course on Power Electronics and Drives. This paper discusses an efficient way of teaching current control in d.c.-a.c. voltage source inverters by computer simulation studies using the student version of PSpice (Release 9.1). Three standard methods have been demonstrated, i.e., triangular carrier method, hysteresis band method, and periodic sampling method. This paper can be used by students for self-study as well as by instructors for simulation-based laboratory experiments.

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Turzyński, M., P. Banach, P. Murawski, R. Pepliński, and P. J. Chrzan. "A predictive estimation based control strategy for a quasi-resonant dc-link inverter." Bulletin of the Polish Academy of Sciences: Technical Sciences 61, no. 4 (December 1, 2013): 757–62. http://dx.doi.org/10.2478/bpasts-2013-0081.

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Abstract Control of parallel quasi resonant dc link inverters (PQRDCLI) is usually based on dc link input inverter current. Instead of a direct measurement of this noise sensitive and fast changing current signal - its estimation with one step prediction may be considered. Estimation of an input inverter current is based on inverter output current measurements, applied in most of power electronics controlled ac drives. In this paper, the PQRDCLI fed induction motor (IM) with a predictive current estimation stabilizes resonant inverter output voltage slopes du/dt independently of load. By control of output voltage derivatives, reduction of overvoltage spikes and common mode motor currents is achieved. An analysis of the PQRDCLI control with a predictive current estimation strategy is verified by the Saber system simulation and experimental tests in a laboratory setup.

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Sukumar, Darly, Vanaja Ranjan, and Justus Rabi. "FLC based adjustable speed drives for power quality enhancement." Serbian Journal of Electrical Engineering 7, no. 2 (2010): 217–29. http://dx.doi.org/10.2298/sjee1002217s.

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This study describes a new approach based on fuzzy algorithm to suppress the current harmonic contents in the output of an inverter. Inverter system using fuzzy controllers provide ride-through capability during voltage sags, reduces harmonics, improves power factor and high reliability, less electromagnetic interference noise, low common mode noise and extends output voltage range. A feasible test is implemented by building a model of three-phase impedance source inverter, which is designed and controlled on the basis of proposed considerations. It is verified from the practical point of view that these new approaches are more effective and acceptable to minimize the harmonic distortion and improves the quality of power. Due to the complex algorithm, their realization often calls for a compromise between cost and performance. The proposed optimizing strategies may be applied in variable-frequency dc-ac inverters, UPSs, and ac drives.

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Li, Wang, San, and Guo. "Current Source AC-Side Clamped Inverter for Leakage Current Reduction in Grid-Connected PV System." Electronics 8, no. 11 (November 6, 2019): 1296. http://dx.doi.org/10.3390/electronics8111296.

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For the grid-connected photovoltaic inverters, the switching-frequency common-mode voltage brings the leakage current, which should be eliminated. So far, many kinds of single-phase inverters have been published for this purpose, but most of them are the conventional voltage-type ones, which have the disadvantages of poor reliability due to the DC-link electrolytic capacitor and the risk of short-through of the bridge switches. To solve this technical issue, a novel current source inverter with AC-side clamping is proposed to mitigate the switching-frequency common-mode voltage. Meanwhile, a novel modulation method is proposed for the new single-phase inverter to achieve low-frequency operation of the main switches, which reduces the switching losses. Finally, the proposed method is implemented on the TMS320F28335DSP + XC6SLX9FPGA digital hardware platform. Also, the performance comparisons are done with the traditional solution. The results prove the proposed solution.

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Oskuee, Mohammad Reza Jannati, Sahar Khalilnasab, Sajad Najafi Ravadanegh, and Gevork B. Gharehpetian. "Reduction of Circuit Devices in Developed Symmetrical/Asymmetrical Multilevel Converters." Journal of Circuits, Systems and Computers 25, no. 04 (February 2, 2016): 1650020. http://dx.doi.org/10.1142/s0218126616500201.

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In this paper, a developed configuration for multilevel voltage source inverters (MVSIs) is proposed. The proposed topology can be used as symmetric and asymmetric inverters. In asymmetric mode, DC source magnitudes are defined in a way that the number of output levels gets more than the case when the symmetrical DC sources are applied. In this regard, to calculate the required magnitudes of DC voltage sources several different solutions are proposed. In multilevel inverters, the overall costs, circuit size and installation area, complexity of control scheme and reliability are directly dependent on the number of circuit devices needed. The provided comparison study among suggested inverter in all defined solutions, cascaded H-bridge (CHB) and recently proposed converters, validates that the proposed inverter uses reduced number of circuit devices. The given simulation results confirm the feasibility of the proposed modular structure. Also, to approve the practicability of the proposed inverter, a prototype of the proposed topology has been implemented. Finally, simulation and experimental results are compared with each other and the provided comparison shows that the obtained results are in good agreements.

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Fairchild, M. Ray, Carl W. Berlin, D. H. R. Sarma, Ralph S. Taylor, Han S. Lee, and Steven E. Staller. "Thin-film High Voltage Capacitors for Hybrid Electric Vehicle Inverter Applications." International Symposium on Microelectronics 2012, no. 1 (January 1, 2012): 001116–23. http://dx.doi.org/10.4071/isom-2012-thp34.

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The propulsion system in hybrid electric vehicles (HEVs) requires an alternating current (AC) electric motor in combination with an internal combustion engine. When the HEV is being propelled by the AC motor, the power for the motor is provided by batteries whose direct current (DC) voltage is chopped into an AC waveform via an electronic device called a power inverter. Capacitors known as DC bulk capacitors are placed between the battery and the inverter to “decouple” the AC switching inverter from the power source. Power electronics inverters use several large high voltage discrete DC bulk capacitors, which negatively influence the inverter's size, weight and are a high cost item in the assembly. The use of a high dielectric constant (Dk) ferroelectric material enables smaller, higher temperature capable, lower-cost power capacitors. Ceramic ferroelectrics, such as (Pb,La)(Zr,Ti)O3 [PLZT], offer the highest dielectric constants. Argonne National Laboratory is developing a novel film-on-foil technology for high-power capacitors utilizing PLZT. These capacitors, with an increasing dielectric constant with temperature, low equivalent series resistance and a benign failure mode, are well suited for power applications. The PLZT is deposited onto a metal foil via a chemical deposition process and the top electrode metal (Pt or Al) is then deposited by electron beam evaporation onto the top surface of the dielectric thus creating the capacitor. This project involved the fabrication and electrical evaluation of film-on-foil capacitors for HEV inverter applications. Capacitors utilizing both nickel and platinum-on-silicon as the base substrate, and PLZT as the dielectric material were fabricated. These capacitors were tested for dielectric integrity, capacitance, voltage breakdown, and benign failure mode. Results from these mechanical and electrical evaluation tests will be presented. Key processing challenges and implementation methods will also be described.

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Ryvkin, Sergey, Richard Schmidt-Obermöller, and Andreas Steimel. "Sliding mode control technique for an induction motor drive supplied by a three-level voltage source inverter." Facta universitatis - series: Electronics and Energetics 21, no. 2 (2008): 195–207. http://dx.doi.org/10.2298/fuee0802195r.

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The possibility of using sliding-mode (SM) technique for an induction motor drive with a class of inverters dedicated to high power, the three-level voltage-source inverter (3LVSI), has been presented. A designed control based on the proposed two-step design procedure is discussed; drive simulation results are shown. .

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Khoun Jahan, Hossein, Reyhaneh Eskandari, Tohid Rahimi, Rasoul Shalchi Alishah, Lei Ding, Kent Bertilsson, Mehran Sabahi, and Frede Blaabjerg. "A Limited Common-Mode Current Switched-Capacitor Multilevel Inverter Topology and Its Performance and Lifetime Evaluation in Grid-Connected Photovoltaic Applications." Energies 14, no. 7 (March 30, 2021): 1915. http://dx.doi.org/10.3390/en14071915.

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In this paper, a switched-capacitor multilevel inverter with voltage boosting and common-mode-voltage reduction capabilities is put forth. The proposed inverter is synthesized with one-half bridge and several switched-capacitor cells. Due to the voltage boosting and common-mode current reduction features, the proposed multilevel inverter is suitable for grid-connected PV applications. In addition, an analytical lifetime evaluation based on mission profile of the proposed inverter has been presented to derive lifetime distribution of semiconductors. Whereas in the proposed inverter, any components failure can bring the whole system to a shutdown. The series reliability model is used to estimate the lifetime of the overall system. The performance of the suggested multilevel inverter in grid-connected applications is verified through the simulation results using the grid-tied model in Matlab/Simulink. Moreover, the viability and feasibility of the presented inverter are proven by using a one kW lab-scaled prototype.

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Vazquez, Nimrod, Marco Rosas, Claudia Hernandez, Esli Vazquez, and Francisco J. Perez-Pinal. "A New Common-Mode Transformerless Photovoltaic Inverter." IEEE Transactions on Industrial Electronics 62, no. 10 (October 2015): 6381–91. http://dx.doi.org/10.1109/tie.2015.2426146.

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Wu, Weimin, and Tianhao Tang. "Dual-Mode Time-Sharing Cascaded Sinusoidal Inverter." IEEE Transactions on Energy Conversion 22, no. 3 (September 2007): 795–97. http://dx.doi.org/10.1109/tec.2007.902672.

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Antreasyan, A., P. A. Garbinski, V. D. Mattera, N. J. Shah, and H. Temkin. "Monolithically integrated enhancement-mode InP MISFET inverter." Electronics Letters 22, no. 19 (1986): 1014. http://dx.doi.org/10.1049/el:19860693.

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Zhang, Ying Li, Yi Chen, and Wei Hua Chen. "A Study of Wind Power Inverter Operating in Grid-Connected and Stand-Alone Mode." Advanced Materials Research 953-954 (June 2014): 400–406. http://dx.doi.org/10.4028/www.scientific.net/amr.953-954.400.

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Wind turbine system (WTS) is a representative distributed power generation (DG). Establishment of WTS model and control strategies is of important practical significance. One critical field is the research of inverter system. It should be operated in stand-alone (SA) or grid-connected (GC) mode. The purpose of this thesis is to establish simulation platform of WTS inverter control model in Matlab/Simulink environment, which includes two typical DG control strategies, PQ and V/f. The wind fluctuation makes inverter output power harder to follow wind turbine (WT) power. In GC mode, PQ strategy was adopted to balance inverter output power and WT generated power. In SA mode, V/f strategy was applied to keep emergency load voltage stable. The bidirectional smooth transitions between SA and GC mode were well accomplished. Simulation proves the model can survive grid failures or load shedding. The study can be used in research of DG operation control.

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Laoufi, Chaymae, Zouhair Sadoune, Ahmed Abbou, and Mohammed Akherraz. "New model of electric traction drive based sliding mode controller in field-oriented control of induction motor fed by multilevel inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 1 (March 1, 2020): 242. http://dx.doi.org/10.11591/ijpeds.v11.i1.pp242-250.

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This paper presents a new model of electric traction drive for electric vehicle. The sliding mode speed controller applied in the Indirect Rotor Field Oriented Control is used to control the induction motor fed by the five levels Neutral Point Clamped inverter (NPC). The simulation results showed the high performances dynamics and high robustness of the proposed model, that are reflected by faster startup and good speed tracking performances in terms of response time, oscillations and disturbance rejection. Also, a comparative study between different inverter topologies: two levels inverter, three levels NPC inverter and five levels NPC inverter has been carried out. From the spectral analysis, the five-levels NPC inverter fed drive provides better dynamics of voltage and current with reduced total harmonic distortion (THD).

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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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Sulong, Dome, and Chuttchaval Jeraputra. "A Grid Connected Flyback Inverter with a DC Active Filter for Photovoltaic Cells." Applied Mechanics and Materials 781 (August 2015): 406–9. http://dx.doi.org/10.4028/www.scientific.net/amm.781.406.

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This paper presents the design and control of a grid-connected flyback inverter with a DC active filter for photovoltaic (PV) cells. The proposed topology consists of a flyback DC-AC inverter and a DC active filter that can operate independently. The flyback inverter, controlled in digital peak current mode, regulates the full-wave rectified sinusoidal current later, which is alternately inverted and injected into the grid. The DC active filter regulates the smooth current/power drawn from a PV module by using cascaded proportional-integral (PI) controllers. Analysis, design and control of the proposed topology are presented. A 100W/220V/50Hz prototype is developed and tested. The experimental results show that the proposed flyback inverter with a DC active filter is capable of regulating a sinusoidal current fed into the grid, actively filtering the DC current/power and achieving reasonably high energy conversion efficiency.

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dos Santos Garcia Giacomini, Priscila, Luiz Carlos de Souza Marques, and Marcello Mezaroba. "Digital Sliding Mode Controlled Three-phase Boost Inverter Implemented In A Dsc." Eletrônica de Potência 13, no. 3 (August 1, 2008): 155–62. http://dx.doi.org/10.18618/rep.2008.3.155162.

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Lopez-Caiza, Diana, Freddy Flores-Bahamonde, Samir Kouro, Victor Santana, Nicolás Müller, and Andrii Chub. "Sliding Mode Based Control of Dual Boost Inverter for Grid Connection." Energies 12, no. 22 (November 7, 2019): 4241. http://dx.doi.org/10.3390/en12224241.

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Single-stage voltage step-up inverters, such as the Dual Boost Inverter (DBI), have a large operating range imposed by the high step-up voltage ratio, which together with the converter of non-linearities, makes them a challenge to control. This is particularly the case for grid-connected applications, where several cascaded and independent control loops are necessary for each converter of the DBI. This paper presents a global current control method based on a combination of a linear proportional resonant controller and a non-linear sliding mode controller that simplifies the controller design and implementation. The proposed control method is validated using a grid-connected laboratory prototype. Experimental results show the correct performance of the controller and compliance with power quality standards.

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Barakhoev, A. L., O. I. Tikhon, and V. V. Tuboltsev. "Study of the operating modes of the high voltage power source for barrier type discharge excitation." Doklady BGUIR 19, no. 1 (February 23, 2021): 46–51. http://dx.doi.org/10.35596/1729-7648-2021-19-1-46-51.

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The issues related to the features of operation and modes setting of a high-voltage switching power source based on a sequential autonomous resonant inverter with reverse diodes used to excite an atmospheric pressure barrier type discharge are discussed in the article. It is indicated that the characteristic features of the autonomous resonant inverters operation are the occurrence of damped voltage fluctuations in the LC circuit of the inverter, as well as the dependence of the output alternating voltage on the ratio of the inverter operating frequency (thyristor switching frequency) to the natural resonant frequency of the LC circuit. Depending on this ratio, the inverter can operate in discontinuous, boundary and continuous current mode. The amplitude and shape of the inverter output voltage were controlled using a 1:1000 voltage divider with a C1-65A oscilloscope. The shape of the gate trigger pulses was obtained using a C1-167 oscilloscope. It is established that when the gate trigger pulses are asymmetrical relative to each other due to the operation features of the step-up transformers, the value of the alternating high-voltage at the inverter output is insufficient to excite the atmospheric pressure barrier type discharge. In the case of the gate trigger pulses symmetry, the output voltage of the inverter stage reaches the values required for the breakdown of the dielectric medium. Oscillograms of the inverter output voltage while adjusting its operating frequency are obtained. It is shown that the amplitude value of the voltage at the gas-discharge load increases as the operating frequency of the inverter increases. For the gate trigger pulses frequency of 250 Hz the value of the inverter output voltage amplitude was 3.4 kV, for 460 Hz – 4.0 kV, and for 550 Hz – 4.2 kV.

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Liu, Gui Ying, Yong Guang Gui, Shi Ping Su, Qian Luo, Jiang Wu, and Xue Rui Jia. "A Control Strategy with Series-Parallel Inverter for Micro-Grid Operation." Advanced Materials Research 1044-1045 (October 2014): 677–80. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.677.

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For the different operation mode of micro-grid, an improved droop control method and a parallel inverter was proposed depending on the study of micro-grid inverter. Grid-connected interface contains a series inverter and a parallel inverter, and can be switched to select different work mode. The parallel inverter can eliminate harmonic, compensate three-phase imbalanced current to improve the quality of the power delivered to the utility grid. In islanding operation mode, the improved droop control strategy was applied, where an integral controller was introduced. So it can reduce the inverter output voltage amplitude. Thereby it can restrain circulation and realize the power of self-distribution. The effectiveness and feasibility are verified by the simulation result.

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Cao, Haiyan. "A Novel Inverter Topology for Single-Phase Transformerless PV System." Active and Passive Electronic Components 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/1962438.

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Transformerless photovoltaic (PV) power system is very promising due to its low cost, small size, and high efficiency. One of its most important issues is how to prevent the common mode leakage current. In order to solve the problem, a new inverter is proposed in this paper. The system common mode model is established, and the four operation modes of the inverter are analyzed. It reveals that the common mode voltage can be kept constant, and consequently the leakage current can be suppressed. Finally, the experimental tests are conducted. The experimental results verify the effectiveness of the proposed solution.

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Antivachis, Michael. "Input/Output EMI Filter Design for Three-Phase Ultra-High Speed Motor Drive GaN Inverter Stage." CPSS Transactions on Power Electronics and Applications 6, no. 1 (March 2021): 74–92. http://dx.doi.org/10.24295/cpsstpea.2021.00007.

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Pairing wide-bandgap (WBG) inverters with high-speed motors results in compact and effi cient motor drives, but requires special attention on electromagnetic interference (EMI) aspects. This paper focuses on electromagnetic compatibility (EMC) of high-speed motor drives, supplied by a DC source. In order to protect the nearby equipment from the EMI noise of the WBG inverter, a fi lter that complies with conducted EMI regulations is placed at the inverter DC input-side. However, there is no clear mandate requiring from inverters to comply with conducted EMI regulations at the AC output-side, where only the motor is placed. For this reason, there is no full consensus whether it is necessary to use an output fi lter, and if so, what type of output fi lter would be suitable, i.e., if differential-mode (DM), common-mode (CM) or both DM/CM output fi lter would fi t best. A full sine-wave output fi lter (FSF) is proposed in this paper, that features both DM and CM attenuation, and capacitors connected to the DC link. Besides the several well established benefi ts of a FSF, such as purely sinusoidal motor currents and the protection of the motor against high du/dt originating from the fast switching of the semiconductor devices, a FSF at the inverter output-side, also reduces the CM EMI emissions at the inverter input-side. Namely, since the inverter housing, the motor housing and the interconnecting shielded cable are all grounded, CM emissions generated at the inverter output-side are directly mapped to the inverter input-side, i.e., there is an input-to-output CM noise interrelation. A FSF reduces the output-side CM EMI emissions and thus mitigates the input-to-output CM noise mutual influence. Two types of FSF (c-FSF and d-FSF) are comparatively evaluated, in terms of volume, losses and EMI performance. The theoretical consideration are tested within the context of a high-speed 280 krpm, 1 kW motor drive, with 80 V DC supply. The experimental results validate the good performance of the proposed filter concept.

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Journal articles on the topic 'Inverter mode'

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