|Table of Contents|

One fast voltage-balancing method of single phase cascaded H-bridge rectifiers
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[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2016年05
Page:
37-44
Research Field:
Publishing date:

Info

Title:
One fast voltage-balancing method of single phase cascaded H-bridge rectifiers
Author(s):
WANG Shun-liang SONG Wen-sheng FENG Xiao-yun
( Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle( Ministry of Education) ,Southwest Jiaotong University,Chengdu 610031,China)
Keywords:
cascaded H-bridge rectifier single phase load imbalance carrier phase-shift DC-link volt-ages balancing voltage offset injection
PACS:
TM 921
DOI:
10. 15938 / j. emc. 2016. 05. 006
Abstract:
Transformerless traction drive system is the trend and effective lightweight solution of high speed EMU. In order to realize the target of solving DC-link voltages unbalance of its front-end single-phase cascaded H-bridge rectifiers ( CHBR) ,a fast DC-link voltages balancing scheme was proposed in serious imbalance load cases. Weakness of the existing classical DC-link voltages balance control method was analyzed. A carrier phase-shift PWM with voltage offset injection ( CPSPWM-VOI) algorithm was proposed to compensate the weakness,and the algorithm is easy to extend to multiple CHBR. Compared with the existing classical DC-link voltages balancing control scheme,the proposed CPSPWM-VOI has a faster speed and stronger ability of DC-link voltages balancing. Effectiveness and correctness of the CPSP-WM-VOI algorithm were verified by the computer simulation and hardware-in-the-loop experiments.

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Last Update: 2016-06-26