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Journal articles on the topic 'Double-frequency ripple power'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Liu, Weiming, Tingting Zheng, Ziwen Liu, et al. "Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions." Energies 11, no. 11 (2018): 3140. http://dx.doi.org/10.3390/en11113140.

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This paper presents a power compensation strategy to suppress the double frequency power ripples of Voltage source converter high-voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions. The mathematical control equations of the double frequency ripple power of VSC under unbalanced operating conditions are firstly derived and established, where the dynamic behaviors of the double frequency ripples in active and reactive power are regarded as being driven by current-relevant components and voltage-relevant components, respectively. Based on the equations, a power comp

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2

Amin, Saghir, Hyun-Hwa Lee, and Woojin Choi. "A Novel Power Decoupling Control Method to Eliminate the Double Line Frequency Ripple of Two Stage Single-Phase DC-AC Power Conversion Systems." Electronics 9, no. 6 (2020): 931. http://dx.doi.org/10.3390/electronics9060931.

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In two-stage single-phase inverters, inherent double line frequency ripple is present at both the input and output of the front-end converter. Generally, large electrolytic capacitors are used to eliminate this double line frequency ripple. It is well known that low frequency ripple shortens the lifespan of capacitors. Hence, the system reliability can get worse. In order to eliminate the double line frequency ripple, additional hardware combined with an energy storage device is required in most of the methods developed so far. In this paper, a novel power-decoupling control method is proposed

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3

Hong, Jiatu, Mahinda Vilathgamuwa, Jian Yin, Yitao Liu, Jianchun Peng, and Hui Jiang. "Power Decoupling of a Single Phase DC-AC Dual Active Bridge Converter Based on an Integrated Bidirectional Buck/Boost Stage." Energies 11, no. 10 (2018): 2746. http://dx.doi.org/10.3390/en11102746.

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In single phase DC-AC systems, double-line-frequency power ripple appears at the DC side inherently. Normally a large electrolytic capacitor can be used to reduce the power ripple at the DC side. But there are several problems with this method as it decreases the power density and reliability of the converter. In addition, a double-line-frequency current ripple appears in case a voltage source serves at the DC side, which is undesired in specific applications. This paper proposes a single phase DC-AC DAB (dual active bridge) converter with an integrated buck/boost stage for power decoupling pu

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4

Munwar, Ayaz Memon, Mustafa Bhutto Ghullam, and Ali Buriro Ehsan. "Sizing of dc-link capacitor for a grid connected solar photovoltaic inverter." Indian Journal of Science and Technology 13, no. 22 (2020): 2272–81. https://doi.org/10.17485/IJST/v13i22.406.

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Abstract <strong>Objective:</strong> To determine the optimum size of a dc-link capacitor for a grid connected photovoltaic inverter. <strong>Methods:</strong> Dc-link capacitors are considered as one of the sensitive parts of the grid connected photovoltaic systems and needs effort to design a reliable and optimal size capacitor as its reliability is concerned with the overall system reliability. The double line frequency power flows between the input and outside of a Φ grid connected PV system which produces voltage ripples at the capacitor and dc link. This voltage ripple

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5

Lai, Jinmu, Zijian Wu, Xianyi Jia, Yaoqiang Wang, Yongxiang Liu, and Xinbing Zhu. "Optimized Submodule Capacitor Ripple Voltage Suppression of an MMC-Based Power Electronic Transformer." Electronics 14, no. 12 (2025): 2385. https://doi.org/10.3390/electronics14122385.

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Modular multilevel converter (MMC)-based power electronic transformers (PETs) present a promising solution for connecting AC/DC microgrids to facilitate renewable energy access. However, the capacitor ripple voltage in MMC-based PET submodules hinders volume optimization and power density enhancement, significantly limiting their application in distribution networks. To address this issue, this study introduces an optimized method for suppressing the submodule capacitor ripple voltage in MMC-based PET systems under normal and grid fault conditions. First, an MMC–PET topology featuring upper an

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Cai, Wei, Hui Min He, Jian Wei Wang, and Shao Ze Su. "A Control Strategy for the Grid-Side Converter of the Directly-Driven Wind Turbine with PM Synchronous Generator under Unbalanced Grid Voltage." Advanced Materials Research 816-817 (September 2013): 669–77. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.669.

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A mathematical model of the full power grid-connecting converter at grid side for permanent magnet synchronous generator (PMSG) under unbalanced grid conditions is built, double-frequency oscillation mechanism on DC voltage is analyzed, and the influence of active power ripple of grid-connecting impedance on dual current control is discussed. To suppress the double-frequency oscillation on DC voltage, and take the grid-connected impedance on active power into account, a dual current control strategy, which based on respectively orientating positive-and negative-sequence voltages,is proposed, a

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Wang, Hui, Tianshi Yu, Manlin Wang, and Guangfu Ning. "Innovative Matrix-Type AC-AC Solid-State Transformer Eliminating Ripple Power with Double-Grid Frequency." Energies 17, no. 7 (2024): 1540. http://dx.doi.org/10.3390/en17071540.

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Single-phase solid-state transformers (SSTs) have the advantages of a compact structure, higher reliability, and multiple functions, and have been widely studied. However, bulky energy storage elements and inherent ripple power with double-grid frequency issues are the main disadvantages of conventional single-phase SSTs. This paper presents a single-phase matrix-type AC-AC SST eliminating ripple power with double-grid frequency. The presented SST consists of a line-frequency-commutated rectifier without bulky DC-link capacitors, an LLC resonant converter, a buck converter, and a line-frequenc

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Zhang, Kaibi, Peng Wu, and Fei Xiong. "Design Method of DC Bus Capacitor for Two-Stage AC/DC Converter." Journal of Physics: Conference Series 2360, no. 1 (2022): 012017. http://dx.doi.org/10.1088/1742-6596/2360/1/012017.

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In the single-phase two-stage AC/DC converter system, the inherent power fluctuation of double frequency will lead to the double frequency fluctuation of DC bus voltage, which will affect the stable operation of the converter. In addition, this fluctuation will also raise the current stress of the double active bridge. This makes it more difficult to design DC bus capacitance parameters. In this paper, a design method of DC bus capacitors based on high ripple operation is proposed, and the theoretical limit of DC bus voltage ripple is analyzed. On the premise of considering stable operation an

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Kroics, Kaspars, Janis Zakis, and Oleksander Husev. "CAPACITANCE REDUCTION USING RIPPLE SUPPRESSION CONTROL OF SINGLE PHASE ENERGY STORED QUASI-Z-SOURCE INVERTER." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 3 (June 15, 2017): 154. http://dx.doi.org/10.17770/etr2017vol3.2621.

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The energy stored Quasi-Z-source Inverter (qZSI) allows integrate energy storage in addition to the other energy source mainly for output power smoothening. Single phase inverter suffers from double-frequency power ripple in the input side and also in the energy storage that is transferred there from the ac-side. In qZSI must be used large electrolytic dc capacitors in the impedance network to suppress this 100 Hz ripple. Also to suppress this ripple can be applied two types of power decoupling: passive power decoupling and active power decoupling. In this paper is analyzed passive power decou

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10

Alharbi, Mohammed, Semih Isik, Abdulaziz Alkuhayli, and Subhashish Bhattacharya. "Power Ripple Control Method for Modular Multilevel Converter under Grid Imbalances." Energies 15, no. 10 (2022): 3535. http://dx.doi.org/10.3390/en15103535.

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Modular multilevel converters (MMCs) are primarily adopted for high-voltage applications, and are highly desired to be operated even under fault conditions. Researchers focused on improving current controllers to reduce the adverse effects of faults. Vector control in the DQ reference domain is generally adopted to control the MMC applications. Under unstable grid conditions, it is challenging to control double-line frequency oscillations in the DQ reference frame. Therefore, active power fluctuations are observed in the active power due to the uncontrolled AC component’s double line frequency

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Yao, Shu Jun, Ming Ran Bao, Ya Nan Hu, Min Xiao Han, Jun Xian Hou, and Lei Wan. "An Integral Method to Improve PLL Performance under Unbalanced Electric Grid Conditions." Applied Mechanics and Materials 347-350 (August 2013): 1318–22. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.1318.

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Accurate phase information on three-phase grid voltage and currents which are supplied by PLL are needed in power system operation. Conventional three-phase synchronous reference frame-based phase locked loop is generally sufficient during balanced operation conditions. But unbalanced in input signal set causes a double-frequency ripple. The output signal is not ideal. There are lots of improved SRF-PLL methods, aiming at removing the double-frequency ripple such as DSC-PLL,MAF-PLL, but these methods may causes a certain time delay. DIF-PLL method is based on adding another signal, which has r

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Noor, M. K. R., A. Ponniran, M. A. Z. A. Rashid, et al. "Optimization of PFC SEPIC Converter Parameters Design for Minimization of THD and Voltage Ripple." International Journal of Engineering & Technology 7, no. 4.30 (2018): 240. http://dx.doi.org/10.14419/ijet.v7i4.30.22274.

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This paper discusses the current total harmonic distortion (THDi) and voltage ripple minimization of SEPIC converter based on parameters design optimization. This conventional PFC SEPIC converter is designed to operate in discontinuous conduction mode in order to achieve almost unity power factor. The passive components, i.e., inductor and capacitor are designed based on switching frequency and resonant frequency. Meanwhile, the ranges of duty cycle for buck and boost operations are between 0<D<0.5 and 0.5<D<1, respectively, for the output voltage variation of the converter. The pr

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Watanabe, Hiroki, Jun-ichi Itoh, Naoki Koike, and Shinichiro Nagai. "PV Micro-Inverter Topology Using LLC Resonant Converter." Energies 12, no. 16 (2019): 3106. http://dx.doi.org/10.3390/en12163106.

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In this paper, a DC–single-phase AC power converter with an LLC resonant converter is presented for a photovoltaic (PV) micro-inverter application. This application requires the leakage current suppression capability. Therefore, an isolated power converter is usually combined for DC/AC systems. The LLC resonant converter is the one of the isolated power converter topologies, and it has good performance for conversion efficiency with easy control. On the other hand, a double-line frequency power ripple has to be compensated for in order to improve the performance of the maximum power point trac

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14

Tang, Yufeng, Zhiyong Li, Yougen Chen, and Renyong Wei. "Ripple Vector Cancellation Modulation Strategy for Single-Phase Quasi-Z-Source Inverter." Energies 12, no. 17 (2019): 3344. http://dx.doi.org/10.3390/en12173344.

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The double-frequency (2ω) power flows through the DC side of the single-phase quasi-Z-source inverter (QZSI) leads to the 2ω voltage ripple of capacitors and 2ω current ripple of inductors. This paper proposes a ripple vector cancellation modulation strategy (RVCMS) based on the thought of ripple vector cancellation. By analyzing the mechanism of ripple generation and transmission, we can obtain a variation of a shoot-through duty cycle to generate a compensated 2ω ripple used to cancel the 2ω current ripple of inductors caused by the 2ω ripple of DC link current, and the 2ω compensated variat

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15

Thitichaiworakorn, Nuntawat, Nattapon Chayopitak, and Natchpong Hatti. "Efficiency Improvement of Three-Phase Cascaded H-Bridge Multilevel Inverters for Photovoltaic Systems." International Journal of Photoenergy 2016 (2016): 1–10. http://dx.doi.org/10.1155/2016/2162190.

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Medium-scale photovoltaic (PV) systems using cascaded H-bridge multilevel inverters have a capability to perform individual maximum power point tracking (MPPT) for each PV panel or each small group of panels, resulting in minimization of both power losses from panel mismatch and effect of partial shading. They also provide high power quality, modularity, and possibility of eliminating dc-dc boost stage and line-frequency transformer. However, each PV panel in the system is subjected to a double-line-frequency voltage ripple at the dc-link which reduces the MPPT efficiency. This paper proposes

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Rashid, M. A. Z. A., A. Ponniran, M. K. R. Noor, J. N. Jumadril, M. H. Yatim, and A. N. Kasiran. "Optimization of PFC cuk converter parameters design for minimization of THD and voltage ripple." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (2019): 514. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp514-521.

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This paper presents the optimization of PFC Cuk converter parameter design for the minimization of THD and voltage ripple. In this study, the PFC Cuk converter is designed to operate in discontinuous conduction mode (DCM) in order to achieve almost unity power factor. The passive components, i.e., inductor and capacitor are designed based on switching frequency and resonant frequency. Nevertheless, the ranges of duty cycle for buck and boost operations are 0&lt;D&lt;0.5 and 0.5&lt;D&lt;1, respectively for the output voltage variation of the converter. The principle of the param

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M., A. Z. A. Rashid, Ponniran A., K. R. Noor M., N. Jumadril J., H. Yatim M., and Kasiran A.N. "Optimization of PFC cuk converter parameters design for minimization of THD and voltage ripple." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 1 (2019): 514–21. https://doi.org/10.11591/ijpeds.v10.i1.pp514-521.

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This paper presents the optimization of PFC Cuk converter parameter design for the minimization of THD and voltage ripple. In this study, the PFC Cuk converter is designed to operate in discontinuous conduction mode (DCM) in order to achieve almost unity power factor. The passive components, i.e., inductor and capacitor are designed based on switching frequency and resonant frequency. Nevertheless, the ranges of duty cycle for buck and boost operations are 0<D<0.5 and 0.5<D<1, respectively for the output voltage variation of the converter. The principle of the parameters design opt

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18

Watcharin, Srirattanawichaikul. "A generalized switching function-based SVM algorithm of single-phase three-leg converter with active power decoupling." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 6 (2020): 6189–201. https://doi.org/10.11591/ijece.v10i6.pp6189-6201.

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In this paper, a generalized switching function-based space vector modulation (SVM) algorithm is presented and evaluated to minimize the dc voltage utilization and the ac utility grid current total harmonic distortion. This paper explores the control and modulation techniques of a single-phase three-leg converter with an active power decoupling method, where a generalized SVM algorithm is proposed and evaluated for easy implementation in a digital control platform. The active power decoupling method with the proposed converter can be achieved via dependent control and modulation techniques. Th

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Srirattanawichaikul, Watcharin. "A generalized switching function-based SVM algorithm of single-phase three-leg converter with active power decoupling." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 6 (2020): 6189. http://dx.doi.org/10.11591/ijece.v10i6.pp6189-6201.

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In this paper, a generalized switching function-based space vector modulation (SVM) algorithm is presented and evaluated to minimize the dc voltage utilization and the ac utility grid current total harmonic distortion. This paper explores the control and modulation techniques of a single-phase three-leg converter with an active power decoupling method, where a generalized SVM algorithm is proposed and evaluated for easy implementation in a digital control platform. The active power decoupling method with the proposed converter can be achieved via dependent control and modulation techniques. Th

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Li, Zhiyong, Shiping Pu, Yougen Chen, and Renyong Wei. "An Integration Optimization Strategy of Line Voltage Cascaded Quasi-Z-Source Inverter Parameters Based on GRA-FA." Energies 13, no. 17 (2020): 4391. http://dx.doi.org/10.3390/en13174391.

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Setting reasonable circuit parameters is an important way to improve the quality of inverters, including waveform quality and power loss. In this paper, a circuit system of line voltage cascaded quasi-Z-source inverter (LVC-qZSI) is built. On this basis, the double frequency voltage ripple ratio and power loss ratio are selected as optimization targets to establish a multi-objective optimization model of LVC-qZSI parameters. To simplify the calculation, an integration optimization strategy of LVC-qZSI parameters based on GRA-FA is proposed. Where, the grey relation analysis (GRA) is used to si

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Zucca, Mauro, Vincenzo Cirimele, Jorge Bruna, et al. "Assessment of the Overall Efficiency in WPT Stations for Electric Vehicles." Sustainability 13, no. 5 (2021): 2436. http://dx.doi.org/10.3390/su13052436.

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The on-site assessment of the efficiency of a charging station is not a trivial process and is a topic of discussion for professionals. The efficiency of electric Vehicle Supply Equipment (EVSE), is an important parameter for both the user and the EVSE operator. This paper deals with a particular type of EVSE, using static wireless power transfer (WPT). This paper proposes a clear method to account for the parameters which can affect the correct determination of efficiency, such as in particular the accuracy of the meters and the effect of temperature. This work proposes a method to define the

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Ma, Zhi Cai, and Yue Zhang. "Research on Direct Torque Control of Doubly-Fed Generator Based on DSP Technology." Advanced Materials Research 756-759 (September 2013): 430–34. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.430.

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Doubly-fed VSCF wind power generator has become the main machine because it can improve the efficiency of wind power and obtain the optimal energy output at rated wind speed. In the control of excitation on double fed generator,the technique of direct torque control become the mostly method.This paper adopts voltage space vectors subdivision technology of direct torque control technology that can improve the low frequency characteristic,and structure the experiment system based on DSP. The result indicated the project is feasiblIntroduction Wind power as a kind of green energy has attracted mo

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Jin, Ning-Zhi, Zhi-Qiang Wu, Long Zhang, Yu Feng, and Xiao-Gang Wu. "Bridgeless PFC Converter without Electrolytic Capacitor Based on Power Decoupling." Electronics 12, no. 2 (2023): 321. http://dx.doi.org/10.3390/electronics12020321.

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Due to fewer conduction devices in operating condition, the bridgeless power factor correction (PFC) converter is more efficient than the traditional PFC circuit. However, to achieve a low output voltage ripple on the DC side, a large electrolytic capacitor must be connected in parallel to the output end. To reduce the value of capacitance, this paper proposes a dual-boost bridgeless PFC converter with a bidirectional buck/boost power decoupling converter in the latter stage. The bidirectional converter absorbs double-line-frequency ripple, lowering the power pulsation at the output end while

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Boudana, Djamel, Lazhari Nezli, Abdelhalim Tlemçani, Mohand Mahmoudi, and Mohamed Tadjine. "Robust DTC Based on Adaptive Fuzzy Control of Double Star Synchronous Machine Drive with Fixed Switching Frequency." Journal of Electrical Engineering 63, no. 3 (2012): 133–43. http://dx.doi.org/10.2478/v10187-012-0021-y.

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Robust DTC Based on Adaptive Fuzzy Control of Double Star Synchronous Machine Drive with Fixed Switching FrequencyThe double star synchronous machine (DSSM) is widely used for high power traction drives. It possesses several advantages over the conventional three phase machine. To reduce the torque ripple the DSSM are supplied with source voltage inverter (VSI). The model of the system DSSM-VSI is high order, multivariable and nonlinear. Further, big harmonic currents are generated. The aim of this paper is to develop a new direct torque adaptive fuzzy logic control in order to control DSSM an

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Benbouhenni, Habib, Nicu Bizon, Ilhami Colak, Phatiphat Thounthong, and Noureddine Takorabet. "Simplified Super Twisting Sliding Mode Approaches of the Double-Powered Induction Generator-Based Multi-Rotor Wind Turbine System." Sustainability 14, no. 9 (2022): 5014. http://dx.doi.org/10.3390/su14095014.

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This work proposes a new indirect filed-oriented control (IFOC) scheme for double-powered induction generators (DPIGs) in multi-rotor wind turbine systems (MRWTS). The IFOC strategy is characterized by its simplicity, ease of use, and fast dynamic speed. However, there are drawbacks to this method. Among its disadvantages is the presence of ripples in the level of torque, active power, and current. In addition, the total harmonic distortion (THD) value of the electric current is higher compared to the direct torque control method. In order to overcome these shortcomings and in terms of improvi

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Phetphimoon, Wasan, Krischonme Bhumkittipich, Prakasit Prabpal, Preecha Yupapin, and Yuttana Kongjeen. "Phase-Shifted Full-Bridge ZVS DC-DC Converter with Synchronous Double Rectifiers for Battery Charging Applications." International Transactions on Electrical Energy Systems 2022 (June 1, 2022): 1–12. http://dx.doi.org/10.1155/2022/4813528.

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This paper presents a phase-shifted PWM-controlled DC to DC power converter with a synchronous double rectifier. The power switches can be directed to achieve the zero-voltage switching condition using the technology of the full-bridge power converter and increase the efficiency of the converter on the secondary side of the transformer. A current doubling rectifier with low current ripple and synchronized rectifier circuits are also adopted. The secondary side of the high-frequency transformer uses the synchronous double rectifier. The synchronous double rectifier circuit converts AC voltage t

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Sun, Guodong, Guijie Yang, Jianyong Su, and Guangxu Lu. "A Flux−Linkage Torque Ripple Suppression Method of Dual−Series FPMSMs Decoupling Control Based on Dual−Frequency Vector Modulation." Energies 15, no. 13 (2022): 4700. http://dx.doi.org/10.3390/en15134700.

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A novel cross−series connection of two five−phase permanent magnet synchronous motors (FPMSM) supplied by single inverter can halve the number of required power units and current sensors. This, along with a decoupling control strategy for FPMSMs in series based on an improved dual−frequency vector modulation (DFV−SVPWM) and a flux−linkage torque ripple suppression method with current compensation are proposed in this paper, each of which have great significance for multi−unit industrial equipment. The third harmonic flux−linkage will produce torque ripple in the FPMSM in series, which has an a

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Hedlin, Michael A. H., J. Bernard Minster, and John A. Orcutt. "An automatic means to discriminate between earthquakes and quarry blasts." Bulletin of the Seismological Society of America 80, no. 6B (1990): 2143–60. http://dx.doi.org/10.1785/bssa08006b2143.

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Abstract In this article we discuss our efforts to use the NORESS array to discriminate between regional earthquakes and ripple-fired quarry blasts (events that involve a number of subexplosions closely grouped in space and time). The method we describe is an extension of the time versus frequency “pattern-based” discriminant proposed by Hedlin et al. (1989b). At the heart of the discriminant is the observation that ripple-fired events tend to give rise to coda dominated by prominent spectral features that are independent of time and periodic in frequency. This spectral character is generally

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Zhang, Jian Hua, Hao Ran Shen, Lei Ding, and Chun Lei Dai. "The Transient Characteristics Analysis of Doubly-Fed Induction Generator during the Asymmetric Voltage Sag." Applied Mechanics and Materials 644-650 (September 2014): 3509–14. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.3509.

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In order to analyze the control strategy of the low voltage ride through (LVRT) of DFIG during the asymmetric voltage sag, it is necessary to analyze the transient performance of a DFIG during the asymmetric voltage sag. In this paper, analyzed the influence of the asymmetric grid voltage to DFIG and the analysis method of the asymmetric voltage sag, and on the basis of positive and negative sequence mathematical model, analyzed the composition of stator output active and reactive power under the condition of asymmetric grid voltage. And built a DFIG asymmetric voltage drop simulation model of

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Guo, Xiaorui, Peiliang Wang, and Yanfeng Wang. "Simulation Analysis of Improved Construction and Control Strategy for Programmable AC Power Source." International Journal of Online Engineering (iJOE) 11, no. 7 (2015): 41. http://dx.doi.org/10.3991/ijoe.v11i7.4766.

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Novel circuit topology and advanced control technique of inverter are research focus for programmable AC power source. An improved dual buck half bridge inverter topology is introduced and the central symmetrical pulse width modulation mode is proposed to double the output current ripple frequency. High output precision can be achieved by optimizing the output waveforms of inverter. Then, a hybrid digital control scheme combining PID control with repetitive control as well as inductance compensation deadbeat control is presented for the closed loop voltage regulation of the mentioned inverter.

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Jiang, Wei, Jieyun Wang, Qianlong Wang, Song Xu, Seiji Hashimoto, and Zhong Liu. "Design and Implementation of a Low-Power Low-Cost Digital Current-Sink Electronic Load ‡." Energies 12, no. 13 (2019): 2611. http://dx.doi.org/10.3390/en12132611.

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Electronic load (e-load) is essential equipment for power converter performance test, where a designated load profile is executed. Electronic load is usually implemented with the analog controller for fast tracking of the load profile reference. In this paper, a low-power low-cost electronic load is proposed. MOSFETs (metal-oxide-semiconductor field-effect transistors) are used as the power consumption devices, which are regulated to the active region as controlled current-sink. In order to achieve fast transient response using the low-cost digital signal controller (DSC) PWM peripherals, the

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Li, Li Yi, Qi Ming Chen, Jia Xi Liu, He Zhu, and Guang Jun Tan. "The Research on Switch-Linear Hybrid of Precise Current Source." Applied Mechanics and Materials 416-417 (September 2013): 559–64. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.559.

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In this paper, a novel current control strategy of precise current source is presented, which combines switch power conversion mode with linear amplification mode. The linear power amplifier is used as the power converter in the current loop. The current controller is a double cascaded PI (DCPI) controller which is put up by the way of analog circuit, it can suppress the high frequency disturbance signal effectively. The switch-filter circuit can generate a special power supply for linear power amplifier, the voltage of this special power supply changes as the load voltage does. The topology o

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Liu, Xiaohu, and Hui Li. "An Electrolytic-Capacitor-Free Single-Phase High-Power Fuel Cell Converter With Direct Double-Frequency Ripple Current Control." IEEE Transactions on Industry Applications 51, no. 1 (2015): 297–308. http://dx.doi.org/10.1109/tia.2014.2326085.

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Carloni, Andrea, Federico Baronti, Roberto Di Rienzo, Roberto Roncella, and Roberto Saletti. "Effect of the DC-Link Capacitor Size on the Wireless Inductive-Coupled Opportunity-Charging of a Drone Battery." Energies 13, no. 10 (2020): 2621. http://dx.doi.org/10.3390/en13102621.

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Wireless inductive-coupled power transfer and opportunity battery charging are very appealing techniques in drone applications. Weight and size are very critical constraints in drones, so the battery and the on-board electronics must be as light and small as possible. The on-board components involved in the resonant inductive-coupled wireless power transfer usually consist of the secondary coil, the compensation capacitor, the bridge rectifier, the LC-filter and the battery. This paper suggests a sizing of the LC-filter capacitor that improves the charging power of the battery. In addition, fu

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You, Donggeun, Hyungseup Kim, Jaesung Kim, et al. "Low-Noise Multimodal Reconfigurable Sensor Readout Circuit for Voltage/Current/Resistive/Capacitive Microsensors." Applied Sciences 10, no. 1 (2020): 348. http://dx.doi.org/10.3390/app10010348.

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This paper presents a low-noise reconfigurable sensor readout circuit with a multimodal sensing chain for voltage/current/resistive/capacitive microsensors such that it can interface with a voltage, current, resistive, or capacitive microsensor, and can be reconfigured for a specific sensor application. The multimodal sensor readout circuit consists of a reconfigurable amplifier, programmable gain amplifier (PGA), low-pass filter (LPF), and analog-to-digital converter (ADC). A chopper stabilization technique was implemented in a multi-path operational amplifier to mitigate 1/f noise and offset

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Zhang, Haiyu, Xiao Li, Baoming Ge, and Robert S. Balog. "Capacitance, dc Voltage Utilizaton, and Current Stress: Comparison of Double-Line Frequency Ripple Power Decoupling for Single-Phase Systems." IEEE Industrial Electronics Magazine 11, no. 3 (2017): 37–49. http://dx.doi.org/10.1109/mie.2016.2627013.

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Shi, Guoping, and Yece Qian. "Research on Cascaded Single Phase PFC Based on Predictive PI Control." World Electric Vehicle Journal 13, no. 3 (2022): 48. http://dx.doi.org/10.3390/wevj13030048.

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In order to improve the charging speed and reduce the occupied volume of an electric vehicle charger, a single-phase boost power factor corrector (PFC) system with cascade CHB (cascaded H-bridge) topology was adopted. Due to the periodic fluctuation of single-phase AC input, there is a large double power frequency ripple component in the output voltage of an AC-DC converter. When capacitor voltage is used as output for feedback control, the control system has the characteristics of a non-minimum phase system. In light of these factors that affect the dynamic stability of the system, a control

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Feng, Yuan, Xingwang Bian, Bowen Song, Ying Li, Pan Pan, and Jinjun Feng. "A G-Band Broadband Continuous Wave Traveling Wave Tube for Wireless Communications." Micromachines 13, no. 10 (2022): 1635. http://dx.doi.org/10.3390/mi13101635.

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Development of a G-band broadband continuous wave (CW) traveling wave tube (TWT) for wireless communications is described in this paper. This device provides the saturation output power over 8 W and the saturation gain over 30.5 dB with a bandwidth of 27 GHz. The maximum output power is 16 W and the bandwidth of 10 W output power is 23 GHz. The 3 dB bandwidth is greater than 12.3% of fc (center frequency). The gain ripple is less than 10 dB in band. A pencil beam of 50 mA and 20 kV is used and a transmission ratio over 93% is realized. The intercept power of the beam is less than 70 W and the

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Ma, Qingqing, Baoming Ge, Daqiang Bi, Fernando J.T.E. Ferreira, and Aníbal T. de Almeida. "A new switched reluctance motor with distributed winding." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 33, no. 6 (2014): 2158–79. http://dx.doi.org/10.1108/compel-08-2013-0275.

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Purpose – The purpose of this paper is to propose a new three-phase switched reluctance motor (SRM), and achieve high-torque and low-cost. This new SRM's winding configuration uses the double-layer distributed windings, which is different from the conventional SRM's single tooth coils. Design/methodology/approach – The operating principle of new SRM is analyzed, and the voltage equation and the generated torque are deduced. Finite element method (FEM) and finite element circuit coupled method are utilized to evaluate the new motor's operating performances. The two dimensional (2D) frequency re

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Haijun, Tao, Zhang Yiming, and Ren Xiguo. "Modeling and Control System Design of Marine Controlled-Source Electromagnetic Detection Transmitter." Open Electrical & Electronic Engineering Journal 9, no. 1 (2015): 571–78. http://dx.doi.org/10.2174/1874129001509010571.

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Marine electromagnetic transmitter transmits large power variable frequency electromagnetic wave to the seabed so as to obtain the submarine structure and mineral resources. The mathematical model of controlled source circuit needs to be established to realize closed loop control for increasing control precision and output transient performance of the electromagnetic wave. The operation process of controlled circuit is analyzed in continuous current mode, two equivalent switching states of controlled source circuit are obtained through the analysis of the different states of the switch in a sw

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Emar, Walid, Haitham Issa, Hasan Kanaker, Osama Fares, and Hani Attar. "A New Double-Switch SEPIC-Buck Topology for Renewable Energy Applications." Energies 17, no. 1 (2024): 238. http://dx.doi.org/10.3390/en17010238.

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In addition to their conventional use in electric motor drives, DC-DC converters have a variety of other uses, such as energy storage, energy conversion, cyber security systems, uninterruptible power supplies, and renewable energy systems. An innovative DC-DC converter is suggested in this article. Designing a new, high-gain DC-DC converter scheme known as a double-switch SEPIC-buck converter (DSSB) is possible after making some adjustments to the SEPIC converter that is currently known in accordance with accepted techniques. The output voltage magnitude of the proposed converter is either lar

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Ramos-Paja, Carlos Andres, Oscar Danilo-Montoya, and Luis Fernando Grisales-Noreña. "Photovoltaic System for Microinverter Applications Based on a Non-Electrolytic-Capacitor Boost Converter and a Sliding-Mode Controller." Electronics 11, no. 18 (2022): 2923. http://dx.doi.org/10.3390/electronics11182923.

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This paper presents a photovoltaic (PV) system designed to reduce the DC-link capacitance present in double-stage PV microinverters without increasing the capacitor interfacing the PV source. This solution is based on a modified boost topology, which exhibits continuous current in both input and output ports. Such a characteristic enables the implementation of PV microinverters without electrolytic capacitors, which improves the reliability in comparison with solutions based on classical converters with discontinuous output current and electrolytic capacitors. However, the modified boost conve

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Wang, Lei, Xinfang Zhang, Xiaoqing Han, Yu Ren, Baifu Zhang, and Peng Wang. "A Transformerless Converter with Common-Mode Decoupling in Low-Voltage Hybrid Grids." Processes 12, no. 3 (2024): 507. http://dx.doi.org/10.3390/pr12030507.

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Compared with isolated converters, transformerless converters are a preferred choice in low-voltage grids due to their efficiency and lower cost. However, leakage current and common mode (CM) voltage appear through the converter and ground in hybrid grids, which consist of AC and DC subgrids. The leakage current and CM voltage seriously influence operation and power quality in low-voltage distribution systems. This paper proposes a common-ground-type (CGT) converter equipped with a CM decoupling control strategy to eliminate the leakage current and CM voltage. A CM model is derived, and the le

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Ribas, Quintana, Cardesin, Calleja, and Lopez-Corominas. "Single-Switch LED Post-Regulator Based on a Modified Class-E Resonant Converter with Voltage Clamp." Electronics 8, no. 7 (2019): 798. http://dx.doi.org/10.3390/electronics8070798.

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The strict restrictions imposed both by mandatory regulations and by the recommendations contained in current standards have led to the fact that most commercially available LED ballasts nowadays use two-stage topologies. The first stage is intended to comply with the harmonics standards and the second stage is used to control the LED current and reduce the low frequency ripple. In this work, a new DC–DC resonant converter topology is presented. This topology is derived from a modified Class-E resonant inverter by adding a clamping diode. This diode achieves a double goal: it limits the maximu

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Wang, Xuchen, Hao Yan, Giampaolo Buticchi, Chunyang Gu, and He Zhang. "Equivalent Phase Current Harmonic Elimination in Quadruple Three-Phase Drives Based on Carrier Phase Shift Method." Energies 13, no. 11 (2020): 2709. http://dx.doi.org/10.3390/en13112709.

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Multiphase drives are entering the spotlight of the research community for transportation applications with their high power density and the possibility of high fault tolerance. The multi three-phase drive is one of the main types of multiphase drives that allows for the direct adoption of commercial three-phase converters and high control flexibility. The elimination of high-frequency current harmonics will reduce the flux linkage harmonics, torque ripple, vibration and noise in machine drives. Therefore, this work introduces a new method to the modelling of equivalent phase current in multi

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Miao, Huiyu, Fei Mei, Yun Yang, Hongfei Chen, and Jianyong Zheng. "A Comprehensive VSM Control Strategy Designed for Unbalanced Grids." Energies 12, no. 6 (2019): 1169. http://dx.doi.org/10.3390/en12061169.

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A virtual synchronous machine (VSM) is a converter which, compared to other types of converters, has more friendly interactions with the power grid because it is able to simulate the external characteristics of a synchronous machine, which can provide virtual inertia and damping. When the grid voltage is unbalanced, there will be negative sequence current and power oscillations. There will also be double-frequency ripples on the DC bus, which affect the normal operation of the DC power source or load. In order to solve these problems, a comprehensive control strategy is proposed in this paper.

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Alharbi, Mohammed. "Control Approach of Grid-Connected PV Inverter under Unbalanced Grid Conditions." Processes 12, no. 1 (2024): 212. http://dx.doi.org/10.3390/pr12010212.

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In grid-connected photovoltaic (PV) systems, power quality and voltage control are necessary, particularly under unbalanced grid conditions. These conditions frequently lead to double-line frequency power oscillations, which worsen Direct Current (DC)-link voltage ripples and stress DC-link capacitors. The well-known dq frame vector control technique, which is effective under normal conditions, struggles with oscillatory component management in unbalanced grid conditions. To address this issue, this paper presents an advanced control approach designed for grid-connected PV inverters. The propo

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Xu, Wei, and Wen Wu Yang. "Improved Model Based Predictive Torque Control Strategy with Fast Dynamic Response for Flux-Switching Permanent Magnet Machines." Applied Mechanics and Materials 416-417 (September 2013): 704–10. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.704.

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The flux-switching permanent magnet machine (FSPMM) has got great attention by academic researchers during the past couple of years for its merits of strong mechanical robustness, high efficiency, strong thermal dissipation ability, etc. However, for its inherited double salient structure in both stator and rotor, the FSPMM suffers from severe torque and flux ripples at different rotor positions for its variable magnetic resistance, which cannot be solved completely only by electromagnetic optimal design. In order to increase the drive performance of FSPMM, such as dynamic response and stable

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Mohamadian, Sobhan, Concettina Buccella, and Carlo Cecati. "Average Current Mode Control of a DC–DC Boost Converter to Reduce the Decoupling Capacitance at the PV Array Output." Energies 16, no. 1 (2022): 364. http://dx.doi.org/10.3390/en16010364.

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Due to the full-wave AC–DC power conversion, second-order frequency oscillations of current and voltage are created in single-phase PV-grid-connected inverters. These oscillations propagate toward the input and adversely affect the PV power utilization ratio. Large power decoupling capacitors are the preliminary solution for coping with voltage ripples across PVs, and they decrease the lifetime of the overall system. This paper proposes the average current mode control (ACMC) of the input inductor in a DC–DC boost converter in a double-stage PV power conversion system. Through extensive explan

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Dai, Chengao, and Shengkai Yue. "Analysis of an improved three-phase voltage source converter with high-performance operation under unbalanced conditions." Applied and Computational Engineering 9, no. 1 (2023): 55–59. http://dx.doi.org/10.54254/2755-2721/9/20230036.

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The power system is rapidly transforming into a new large-scale distributed power generation model using renewable energy. Grid-connected converters, particularly voltage control compensators like STATCOM, will be crucial to the functioning of this new situation. Voltage source converter (VSC) is one of the most commonly used topologies in grid connection converters. As a distributed power-generating device, VSCs can be utilized as a means of connecting sustainable energy sources to the power grid. The three-phase voltage source currents or voltage ripples may appear in the DC chain. This stud

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