期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 12, 页码 14692-14705出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3192255
关键词
Distortion; Voltage; Harmonic analysis; Inductors; Space vector pulse width modulation; Power conversion; Switches; Dead-time distortion; pulsewidth modulation (PWM) strategies; voltage source converters (VSCS)
资金
- National Natural Science Foundation of China [51777176, 61733015]
- China Postdoctoral Science Foundation [2021M702709]
This article presents a comparative analysis of the dead-time distortion between continuous PWM (CPWM) strategies and discontinuous PWM (DPWM) strategies in three-phase voltage source converters. It also proposes improved PWM strategies to mitigate the dead-time distortion. Experimental tests are conducted to verify the effectiveness of the improved strategies.
Pulsewidth modulation (PWM) strategies, including continuous PWM (CPWM) and discontinuous PWM (DPWM), have been efficiently applied in the three-phase voltage source converters (VSCs). In the three-phase VSCs, dead-time distortion is inevitable. The characteristics of the dead-time distortion of three-phase VSCs with CPWM strategies have been studied extensively, whereas those of DPWM strategies have not been studied in detail. In this article, a comparative analysis of the dead-time distortion of CPWM strategies and DPWM strategies is conducted. Furthermore, the improvement of the PWM strategies to mitigate dead-time distortion is presented. The improved PWM strategies inject the compensation signals to the modulation signals to reconstruct the dead-time voltage error, which can significantly reduce the dead-time distortion of various PWM strategies. Experimental tests are conducted and the experimental results are provided to verify the analysis results of the dead-time distortion of DPWM strategies and the improved PWM strategies.
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