Title :
Adaptive phase control for three phase PWM AC-to-DC converters with constant switching frequency
Author :
Wong, Chuck ; Mohan, Ned ; He, Jin
Author_Institution :
Morrison Knudsen Corp., Hornell, NY, USA
Abstract :
An adaptive phase control (APC) scheme is proposed for three phase AC-to-DC converters to improve the power factor and minimize harmonic distortion. The APC scheme employs PWM principle and uses separated regulation loops for phase regulation and amplitude regulation to control the phase of the line current so that the converter draws nearly sine wave current with unity power factor. DC voltage regulation with fast dynamic response is achieved by the amplitude regulation loop. The inherent bidirectional power flow is an important property for motor drives with regenerative operation. Moreover, the converter is operated at a constant switching frequency around 1 kHz, which is favorable for high power applications.<>
Keywords :
adaptive control; phase control; power convertors; power factor; pulse width modulation; switching; voltage control; DC voltage regulation; adaptive phase control; constant switching frequency; fast dynamic response; harmonic distortion minimisation; inherent bidirectional power flow; motor drives; phase regulation; power factor; separated regulation loops; sine wave current; three phase PWM AC-to-DC converters; Adaptive control; Bidirectional power flow; Harmonic distortion; Motor drives; Phase control; Programmable control; Pulse width modulation; Pulse width modulation converters; Reactive power; Voltage control;
Conference_Titel :
Power Conversion Conference, 1993. Yokohama 1993., Conference Record of the
Conference_Location :
Yokohama, Japan
Print_ISBN :
0-7803-0471-3
DOI :
10.1109/PCCON.1993.264244
