基于瞬时无功理论的交流电机弱磁控制  

Field-weakening Control of AC Motor based on Instantaneous Power Theory

作　　者：师蔚[1] 张舟云 蔚兰[1] 

机构地区：[1]上海工程技术大学,上海201620 [2]上海安乃达驱动技术有限公司．上海200240

出　　处：《电力电子技术》2008年第4期61-62,70,共3页Power Electronics

摘　　要：提出了一种适合车用的永磁无刷电机(PMBM)的瞬时无功理论弱磁控制。该控制能在不明显改变电机相电流波形的前提下,解决车用PMBM高速弱磁控制问题。该方法在低速工况下采用最大转矩/电流比控制方式,以充分利用永磁磁阻转矩来提高转矩输出能力;在高速工况下采用恒功率弱磁控制,以拓展电机速度范围。样机系统的试验结果表明,采用瞬时无功理论实现的电机控制,在全速度范围内具有很好的可靠性和安全性。A method of field-weakening control with square current based on instantaneous power theory is presented to overcome the difficuhy of high density PMBM at high speed,without changing the current wave and without complex vector transform.This method includes maxim torque per ampere control method at low speed and constant power field- weakening control at high speed.Experiment result shows that there are excellent performance in all speed range and high reliability and safety used in EV.

关 键 词：交流电动机 控制 无功功率补偿 

分 类 号：TM34[电气工程—电机]