doi:10.16186/j.cnki.1673-9787.2020060059

Received:2020/06/20

Revised:2020/10/26

Published:2021/09/15

Research on continuous frequency conversion speed regulation of high frequency section of six pulse AC-AC frequency converter

MENG Yaokai1, KONG Bingya2, CUI Zhanqi3, FENG Gaoming1

1.School of Electrical Engineering and Automation， Henan Polytechnic University， Jiaozuo  454000,Henan， China;2.No. 13 Mine of Pingmei Co.， Ltd. ，Xiangcheng,452670,Henan， China;3.Haima New Energy Co.,Ltd.,Zhengzhou  450016,Henan， China

Abstract:The six-pulse double-variable AC-AC frequency converter has poor symmetry and high harmonic content in the high frequency range （ above 25 Hz ）,which easily leads to the vibration of motor speed and torque in the process of speed regulation. In order to solve this problem,based on the bivariate cosine intercept method,the high frequency waveform symmetry was promoted and output waveform of the inverter in high frequency band could be optimized. At the same time,switching between the frequency in high frequency band was also researched,which made switching between the spectrum smoother,so as to enhance the range of frequency conversion speed regulation and speed control performance of the six-pulse double-variable converter. Finally,through simulation and experiment,the feasibility of continuous frequency conversion speed regulation mode in high frequency band of six-pulse double-variable AC-AC converter was verified.

Key words:AC-AC frequency conversion;high frequency section;waveform optimization;frequency conversion speed regulation

 六脉波交交变频器高频段连续变频调速研究_孟耀凯.pdf