采用BUCK电路的低电感无刷直流电动机转矩脉动与损耗分析  

Torque Ripple and Loss Analysis in Low Inductance BLDCM Driver Using BUCK Circuit

作　　者：侯红胜[1] 刘卫国[1] 马瑞卿[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《微特电机》2012年第7期9-11,18,共4页Small & Special Electrical Machines

摘　　要：通过分析低电枢电感无刷直流电动机的特点,在无刷直流电动机驱动器逆变电路前级采用BUCK变换电路实现电压的调整,在逆变电路中采用Hall信号换相而不叠加PWM斩波信号。通过建立无刷直流电动机及其驱动电路的模型,并对其进行仿真分析,结果表明采用BUCK变换电路后能够减小电机的相电流和母线电流的脉动,减小电磁转矩脉动,消除直流端反向电流,电机铁损耗和铜损耗也大大降低。By analyzing the characters of low armature inductance brushless direct current motor, BUCK converter was added in front of the 3-phase inverter. The inverter was changed through it. The position signal was used to realize phase commutation without PWM chopper combining on it. A model including the motor and driver was established. The simulation results show that DC-link, torque tipple, iron loss and copper loss are reduced dramatically in this kind of driver circuit. The reversal DC-link current is vanished.

关 键 词：无刷直流电动机 BUCK变换电路 反向电流 转矩脉动 铁损耗 铜损耗 

分 类 号：TM33[电气工程—电机]