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http://dx.doi.org/10.6113/JPE.2019.19.2.333

A Novel Method for Compensating Phase Voltage Based on Online Calculating Compensation Time  

Wang, Mingyu (College of Automotive Engineering, Harbin Institute of Technology)
Wang, Dafang (College of Automotive Engineering, Harbin Institute of Technology)
Zhou, Chuanwei (Integrated Project Management, Beijing Benz Automotive Co. Ltd.)
Liang, Xiu (College of Automotive Engineering, Harbin Institute of Technology)
Dong, Guanglin (College of Automotive Engineering, Harbin Institute of Technology)
Publication Information
Journal of Power Electronics / v.19, no.2, 2019 , pp. 333-343 More about this Journal
Abstract
Dead time and the nonideal characteristics of components all lead to phase voltage distortions. In order to eliminate the harmful effects caused by distortion, numerous methods have been proposed. The efficacy of a method mainly depends on two factors, the compensation voltage amplitude and the phase current polarity. Theoretical derivations and experiments are given to explain that both of these key factors can be deduced from the compensation time, which is defined as the error time between the ideal phase voltage duration and the actual phase voltage duration in one Pulse Width Modulation (PWM) period. Based on this regularity, a novel method for compensating phase voltage has been proposed. A simple circuit is constructed to realize the real-time feedback of the phase voltage. Utilizing the actual phase voltage, the compensation time is calculated online. Then the compensation voltage is derived. Simulation and experimental results show the feasibility and effectivity of the proposed method. They also show that the error voltage is decreased and that the waveform is improved.
Keywords
Compensation time; Dead time; Nonideal characteristics of components; Real-time feedback on phase voltage;
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