1. Improved PWM Strategies to Mitigate Dead-Time Distortion in Three-Phase Voltage Source Converter.
- Author
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Wang, Lei, Xu, Jianping, Chen, Qiang, Chen, Zhengge, Geng, Xinghai, and Lin, Kai
- Subjects
- *
VOLTAGE-frequency converters , *IDEAL sources (Electric circuits) , *PULSE width modulation transformers , *PULSE width modulation - Abstract
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. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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