Six-step Voltage Control of PM Brushless AC Motors under High Speed Flux-weakening Operation for EV/HEV Applications  

作　　者：诸自强 

机构地区：[1]Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK

出　　处：《电力电子技术》2008年第10期2-4,13,共4页Power Electronics

摘　　要：The torque-speed characteristics of brushless motor having an interior permanent magnet rotor and a sinusoidal back-emf waveform are compared experimentally when it is operated in brushless AC(BLAC) mode and brushless DC (BLDC) modes with both 2-phase,120° conduction(BLDC-120) and 3-phase,180° conduction(BLDC-180).Particular emphasis is on high-speed,six-step voltage controlled,flux-weakening operation.It is shown that for EV/HEV applications,even for interior PM brushless motors which have sinusoidal back-emf waveforms,in order to achieve maximum torque per ampere capability over wide operation speed range,it is advantageous to employ a hybrid operation mode-BLAC operation in the constant torque region and six-step voltage control(BLDC-180 operation,together with current phase control) in the flux-weakening region.The torque-speed characteristics of brushless motor having an interior permanent magnet rotor and a sinusoidal back-emf waveform are compared experimentally when it is operated in brushless AC （BLAC） mode and brushless DC （BLDC） modes with both 2-phase, 120° conduction （BLDC-120） and 3-phase, 180° conduction （BLDC-180）.Particular emphasis is on high-speed, six-step voltage controlled,flux-weakening operation.It is shown that for EV/HEV applications, even for interior PM brushless motors which have sinusoidal back-emf waveforms, in order to achieve maximum torque per ampere capability over wide operation speed range, it is advantageous to employ a hybrid operation mode-BLAC operation in the constant torque region and six-step voltage control （BLDC-180 operation, together with current phase control） in the flux-weakening region.

关 键 词：电压 控制方法 交流电动机 频率 

分 类 号：TM63[电气工程—电力系统及自动化] TM34