三相三电平二极管箝位型整流器的单载波调制和中点平衡控制策略研究.pdf

26 8 Vol.26 No.8 Apr. 2006 2006 4 Proceedings of the CSEE ©2006 Chin.Soc.for Elec.Eng. 0258-8013 (2006) 08-0007-05 TM461 A 470 40 ⋅ ( 310027) Single-carrier Modulation and Neutral-point Balancing Method for Simplified Three-phase Three-level Diode-clamped Rectifer WANG Xiao-fengDENG YanHE Xiang-ning College of Electrical Engineering of Zhejiang UniversityHangzhou 310027Zhejiang ProvinceChina ABSTRACT: In this paper, single-carrier modulation method PWM is proposed to control a simplified three-phase three-level 1 diode-clamped rectifier (TTDCR) after the analysis of rectifier at non-regenerative applications. Single-carrier modulation makes the use of analogue chip in TTDCR possible. The problem of neutral-point balance is resolved by [2-4] changing the amplitude of current reference according to the voltage error of two capacitors. At the end of the paper, [ 5-15] experimental results based on uc3854bn as controllers and the simulation results are showed. It is proved that the input current traces input voltage well, and neutral-point balance is achieved.