新型三相容错逆变器研究  

Fault-tolerant three-phase inverter

作　　者：贺虎成[1] 张玉峰[1] 王永宾[1] 周奇勋[1] 

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054

出　　处：《电力自动化设备》2015年第5期89-93,共5页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51277149;51307137)~~

摘　　要：功率变换器中电力电子器件及其驱动电路是最易发生故障的薄弱环节,为提高系统可靠性,提出一种新型容错逆变器。通过在每个桥臂上串联快速熔断器,实现短路故障转换为开路故障,同时实现所在支路的故障隔离。通过在传统逆变器的直流环节添加辅助单元,实现逆变器发生单上开关管开路故障、单下开关管开路故障和一个桥臂上下两开关管同时开路故障时的容错运行,并且不降低系统性能。详细阐述该容错逆变器拓扑的工作原理和动作模式。对提出的新型容错逆变器驱动三相无刷直流电机进行仿真和实验,结果验证了电路结构和理论分析的正确性与可行性。Since the power electronic component and its driving circuit of power converter are the weak sections most likely to occur fault,a kind of fault-tolerant inverter is proposed to improve the system reliability,which has a series instant-fuse on each bridge arm to convert a short-circuit fault into an open- circuit fault for the branch fault isolation. An auxiliary unit is added to the DC section of traditional inverter to realize the fault-tolerant operation without system performance degrading for single bridge-arm mono-/dual-switch open-circuit fault. Its working principle and operating modes are described. Simulation and experiment are carried out for a three-phase brushless DC motor driven by the proposed inverter,which verifies the correctness and feasibility of the circuit structure and theoretical analysis.

关 键 词：逆变器 故障隔离 脉冲宽度调制 控制 无刷直流电机 容错 

分 类 号：TM464[电气工程—电器]