铁道科学与工程学报2018，Vol.15Issue(2)：497-505,9.
虚拟零矢量的三相四开关中点电位不平衡研究
Research on neutral point potential unbalance of three phase four switch based on virtual zero vector
摘要
Abstract
Three-phase four switch inverter is one of the low cost control schemes of three-phase six switch inverter, but the problems of torque ripple and neutral potential unbalance exist in three-phase four switch inverter. At present, many scholars at home and abroad put forward many control methods for three-phase four switches, which can effectively reduce the torque ripple of motor, but can not effectively solve the problem of capacitor neutral point potential. If the capacitor neutral point potential compensation is not considered, it will lead to poor effect of SVM DTC, affect the balance of three-phase current, increase the torque ripple of the motor, and will lead to downtime in serious cases. Based on the basic vector analysis of three-phase four switch inverter, a new capacitor voltage compensation scheme was proposed in this paper. It was then compared with the current compensation algorithm through analysis, simulation and experimental verification, and the results show that the metor compensated by algorithm proposed in this paper has a better performance.关键词
三相四开关逆变器/SVMDTC/中点电位补偿Key words
three-phase four switch inverter/SVM DTC/neutral point potential compensation分类
信息技术与安全科学引用本文复制引用
姜宋阳,成庶,向超群..虚拟零矢量的三相四开关中点电位不平衡研究[J].铁道科学与工程学报,2018,15(2):497-505,9.基金项目
高速铁路系统安全保障技术资助项目( 2016YFB1200401) （ 2016YFB1200401）
