A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme

Chen, Yenan; Xu, Dehong; Xi, Junhua; Hu, Guangcheng; Du, Chun‐Hui; Li, Yawen; Chen, Min

doi:10.1109/tpel.2015.2456032

Cited by 77 publications

(10 citation statements)

References 21 publications

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“…The energy stored in the resonant inductor can be accurately controlled to meet the ZVS conditions under different load situations. In recent years, ZVS-SPWM has been proposed for single-phase inverters and threephase inverter/rectifier with either 3-wire or 4-wires [24][25][26]. Meanwhile, the circuit operation principle and ZVS conditions are separately discussed in 3-wire and 4-wire systems according to SPWM and SVM schemes.…”

Section: Introductionmentioning

confidence: 99%

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

Shi

Deng

2020

IEEE Open J. Power Electron.

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A general PWM method for soft-switching threephase power converters-Edge Aligned PWM (EA-PWM) is proposed. It aligns all the high loss commutation instants of the converter bridges in a switching cycle at the same instant so that all the switches of the three-phase converter can realize zerovoltage-switching (ZVS) with the help of the resonant auxiliary circuit which operates once each switching cycle. EA-PWM scheme for ZVS active-clamping three-phase converter is introduced. ZVS condition and voltage stress of the converters is derived. EA-PWM can adapt to various modulation methods such as SPWM, Harmonic Injected SPWM, Continuous Pulse Width Modulation (CPWM), Discontinuous Pulse Width Modulation (DPWM), etc. The ZVS condition of three-phase Compound Active Clamping (CAC) converter are discussed. Finally, EA-PWM scheme is verified in Back-to-Back (BTB) converter prototype.

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Section: Introductionmentioning

confidence: 99%

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

Shi

Deng

2020

IEEE Open J. Power Electron.

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“…Inverters can be categorized into two structures: isolated and non-isolated structures. In terms of the weight, size, and cost, among isolated inverters are a high-frequency transformer, also known as fly-back inverters [8]- [11], serial connection of DC-DC converter and a full-bridge inverter [12], [13] and serial connection of a DC-DC converter, a transformer and an ac-ac converter [14]. Nonetheless, these topologies are able to generate a high voltage gain and have advantages in terms of safety, but complicated control structures are features that all have.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Proposed Switching Method on Reliability and Total Harmonic Distortion of the Quasi Z–Source Inverters

et al. 2020

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An Improved Sinusoidal Pulse Width Modulation (ISPWM) technique carried out to obtain pure sine waves for voltage and current signals in Quasi Z-Sourc Inverters (QZSIs) in the load side is given in this study. This switching method can be examined to two and multi-phase approaches simply through the addition of the same controller structure to per phase. This is the main advantage of the proposed converter to obtain higher voltage gains at the output ends of this inverter. The idea is to generate a positive rectified voltage at the output point of the QZSI and positive and negative rectified voltages at the output terminals of the QZSI in two-phase approaches to improve the quality of the output voltage of the F-Bridge Inverter (FBI). These rectified voltages are applied to the Full-Bridge Inverter (FBI) block and pure sine waves to obtain the load current and voltages. 1.34% of the Total Harmonic Distortion (THD) for the output voltage has been reported in the one-phase system while 0.88% of THD has been obtained in the two-phase approach. Besides, the reliability of the QZSI was tested through the Mean Time to Failure (MTTF) analysis with the values of the proposed components. The calculations show a very good result for the long-life of the converter. All experimental and simulations steps have been obtained for the same values of the components to support and confirm the accuracy and correctness of the proposed IMSPW. For the states of single-phase and two-phase converters, a 50 Hz sine-wave with 220 V and 440 V peak to peak amplitude has been acquired. Evaluations of the quality of the voltage and current waveforms related to different active (Resistive, P) and reactive (combination of Resistance and Inductance, QL) loads have been carried out. Experimental results show confirmation for all simulation and mathematical results. INDEX TERMS Sinusoidal pulse width modulation (SPWM), F-bridge inverter (FBI), total harmonic distortion (THD), mean time to failure analysis (MTTFA).

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“…Isolated inverters not only are expensive and heavy and have larger size in comparison with nonisolated inverters, but also, because of the existence of transformers in their circuits, normally they are not efficient [4][5][6]. Considering the weight, size, and cost, isolated inverters include a high-frequency transformer that is called a fly-back inverter [7][8][9][10], a serial connection of a DC-DC converter and a full bridge inverter [11,12], and a serial connection of a DC-DC converter, a transformer, and an AC-AC converter [12]. The fly-back type of inverter has several advantages like wide input voltage range and lower voltage rating on secondary components, but it has a higher EMI value because of the gap in the transformer and higher current ripples, and it needs a larger amount of input and output capacitors.…”

Section: Introductionmentioning

confidence: 99%

THD minimization for Z-source-based inverters with a novel sinusoidal PWMswitching method

Ghaderi¹

2019

Turk J Elec Eng & Comp Sci

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This paper presents a modified sinusoidal pulse width modulation (SPWM) switching method for one-phase and investigated two-phase impedance-source inverter structures. The proposed structure generates pulses for a quasi-Z-source converter and this block produces a unilateral voltage sine wave in the block's output. This signal is applied to the inverter as its input wave. For this purpose, the novel SPWM method is proposed for power switches while being switched complementarily. Two power switches are used in the structure to generate the pure sinusoidal output voltage and to minimize total harmonic distortion (THD), which is an essential parameter in inverter design. The results show that the proposed method generates the pure sinusoidal voltage and current signals for resistive and inductive loads and pure voltage and improved current waves for capacitive loads in comparison with existing techniques, since the THD of the output voltage and current signals is strongly affected by the dynamic loads. This method leads to final cost improvement and reduction of the size of the system with fewer number of components, which are essential parameters for renewable energy resource applications. A mathematical model is validated with the 2017a version of MATLAB/Simulink and 1.51% and 1.33% THD values are reported for low and high power loads, respectively, in the one-phase structure and 0.95% and 0.87% in the two-phase system. Finally, a 120 W prototype has been implemented and tested. A sine-wave with 620 Vac peak to peak amplitude and 50 Hz frequency has been gained in the inverter's output and the quality of the voltage and current waveforms has been evaluated for different two 1.8 k Ω and 600 Ω resistive loads in the one-phase structure. Experimental results confirm all mathematical and simulation results.

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A ZVS Grid-Connected Full-Bridge Inverter With a Novel ZVS SPWM Scheme

Cited by 77 publications

References 21 publications

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

Influence of a Proposed Switching Method on Reliability and Total Harmonic Distortion of the Quasi Z–Source Inverters

THD minimization for Z-source-based inverters with a novel sinusoidal PWMswitching method

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