五桥臂逆变器驱动的双永磁同步电机系统占空比优化调制策略  

Duty Cycle Optimization Modulation Strategy for a Five-Leg-Inverter Supplying Two PMSM System

作　　者：史婷娜[1] 张必军 刘涛[1] 魏玉春[1] 夏长亮[2] 

机构地区：[1]天津大学电气与自动化工程学院,天津市南开区300072 [2]天津市电工电能新技术重点实验室(天津工业大学),天津市西青区300387

出　　处：《中国电机工程学报》2015年第6期1498-1507,共10页Proceedings of the CSEE

基　　金：国家重点基础研究发展计划(973项目)(2013CB035600);国家自然科学基金项目(51377121)~~

摘　　要：以五桥臂电压源逆变器驱动两台三相永磁同步电机控制系统为研究对象,提出一种适合该系统的占空比优化调制策略。在空间矢量脉宽调制的基础上,分析逆变器驱动信号占空比的取值范围;为满足不同情况下公共桥臂的控制要求,分别对5个桥臂的占空比进行合理优化。该策略在两电机解耦控制的同时,有效减少了两电机受零电压矢量控制的时间,扩展了系统的调速范围,从而能提高直流母线电压的利用率。仿真和实验结果验证了该调制策略的可行性和有效性。A modulation strategy was proposed to optimize the duty cycle of the control system, in which two three-phase permanent magnet synchronous motors （PMSM） were fed by five-leg voltage source inverter. On the base of the space vector pulse width modulation, the duty cycles ranges of driving signals had been analyzed. To meet the control requirements of the public bridge under different situations, the duty cycles of the five bridge arms were optimized respectively. In this way, the public bridge arm could control the two motors at the same time in the modulation period. This strategy can reduce the role of zero-voltage vector effectively while the two motors achieve decoupling control. Thereby the speed range of the system is extended, and the utilization of the DC bus voltage can be increased. Simulation analysis and experimental results can verify the feasibility and effectiveness of the modulation strategy.

关 键 词：五桥臂电压源逆变器 永磁同步电机 空间矢量脉宽调制 占空比优化 

分 类 号：TM371[电气工程—电机]