无刷直流电机驱动用IGBT逆变器能耗分析  

Power Losses in IGBT Inverter for Brushless DC Motor

作　　者：贺虎成[1] 杜京义[1] 刘卫国[2] 

机构地区：[1]西安科技大学,陕西西安710054 [2]西北工业大学,陕西西安710072

出　　处：《电力电子技术》2009年第4期34-36,共3页Power Electronics

摘　　要：为了预测电机系统的性能和提高设计的可靠性,根据无刷直流电机(BLDCM)的PWM调制原理和IGBT的损耗机理,采用损耗分离法提出了BLDCM驱动用IGBT逆变器的功耗计算模型。逆变器的通态损耗是与IGBT正向通态压降、电机电流和开关占空比有关的函数,而其开关损耗是开关器件的开关时间、电机电流、逆变器的供电电压以及调制频率的函数。对提出的损耗模型进行了仿真计算和实验验证,仿真计算结果与实验结果具有较好的一致性。According to pulse width modulation （PWM）principle of brushless DC motor （BLDCM） and power losses in insulated gate bipolar transistor （IGBT）, an analytical model is presented for inverter in BLDCM to predict the performance of motor systems and to improve the reliability.The conduction loss in inverter is a function of on-state voltage drops of IGBT,current of BLDCM and duty cycle.The switching loss in inverter is a function of switching time of IGBT,DC voltage, current of BLDCM and switching frequency.Subsequent simulation and experiment are performed for BLDCM,and their results show good agreement.

关 键 词：逆变器 无刷直流电机 损耗/绝缘栅双极晶体管 

分 类 号：TM464[电气工程—电器]