Current-zero-crossing Shift for Compensation of Dead-time Distortion in Pulse-width-modulated Voltage Source Inverter
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1
Electrical Engineering Department, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, India
2
Electrical Engineering Department, Indian Institute of Technology Kharagpur, Kharagpur, India
Power Electronics and Drives 2023;8 (43):84-99
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ABSTRACT
Accurate current polarity detection is a major issue for successful compensation of dead-time distortion in pulse-width-modulated
(PWM) voltage source inverter. The present study is concerned with the concept of shift in current-zero-crossing due to dead-time
distortion compensation that results in error in current polarity detection and thus causes a problem with regard to the successful
continuation of compensation. The phenomenon is analysed in detail, along with its dependence on different factors. The proposed
concept is validated in digital simulation and also through experimental verification. The study also recommends the possible correction
to be incorporated in view of such zero-crossing shift for achieving proper compensation, especially in case of current-sensor-less
compensation techniques.