Title :
A multi-level buck converter based rectifier with sinusoidal inputs and unity power factor for medium voltage (4160-7200 V) applications
Author :
Zhang, M.L. ; Wu, B. ; Xiao, Y. ; Dewinter, F. ; Sotudeh, R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Ryerson Polytech. Inst., Toronto, Ont., Canada
Abstract :
A novel rectifier topology for high power (0.5 to 10 MVA) current source based AC motor drives is proposed. This rectifier is composed of a multi-winding transformer, a multilevel diode rectifier and a multi-level buck converter. The rectifier produces near unity input power factor and sinusoidal input current under any operating conditions. In addition, the proposed rectifier has a few other features such as reliable operation and high voltage operation capability. This paper addresses a number of system design considerations such as switching pattern, input power quality and the effects of discrepancies of transformer leakage inductances on the system performance. Experimental results on a 5 kVA/208 V four-level prototype are also included
Keywords :
AC motor drives; AC-DC power convertors; harmonic distortion; power conversion harmonics; power factor correction; power transformers; rectifying circuits; transformer windings; 0.5 to 10 MVA; 280 V; 4160 to 7200 V; 5 kVA; AC motor drives; HV operation capability; MV applications; design considerations; input power quality; multi-level buck convertor-based rectifier; multi-winding transformer; multilevel diode rectifier; operating conditions; rectifier topology; sinusoidal input current; sinusoidal inputs; switching pattern; transformer leakage inductance; unity input power factor; unity power factor; AC motors; Buck converters; Diodes; Power quality; Power system reliability; Prototypes; Reactive power; Rectifiers; System performance; Topology;
Conference_Titel :
Power Electronics and Drive Systems, 1999. PEDS '99. Proceedings of the IEEE 1999 International Conference on
Print_ISBN :
0-7803-5769-8
DOI :
10.1109/PEDS.1999.794609
