基于BUCK变换器的无位置传感器无刷直流电动机驱动电路实现  

Implernentation of Drive Circuit for Position Sensorless Brushless DC Motor Based on BUCK Converter

作　　者：王爽[1] 李铁才[1] 王治国[2] 

机构地区：[1]哈尔滨工业大学电气工程学院,哈尔滨150001 [2]哈尔滨工业大学深圳研究生院,深圳518055

出　　处：《微电机》2008年第11期26-29,共4页Micromotors

摘　　要：提出一种新型无位置传感器无刷直流电动机的驱动电路。方案采用三相逆变桥输入端加上BUCK变换器电路结构,在直流母线电流反馈闭环的控制方式下,通过检测电机端电压来获得转子位置信息,实现无位置传感器驱动。这种基于电流控制的电压型逆变器电路结构,电机端电压的差值能够真实反映绕组的线反电动势;提供恒定的电磁转矩,保证负载条件下顺利起动。转子位置信号处理和电流PI调节器算法由8位单片机实现,整个系统简单,可靠。In this paper a novel drive circuit for brushless DC motor was proposed. By adding BUCK converter in the front of three-phase inverter and adopting DC link current closed-loop control method, the line back electromotive force was true representation by the difference of motor terminal voltages, the rotor position could be accurate obtained and the trouble-free starting up could be insured. Based on 8 bits microcontroller, the processing of rotor position signal and the algorithm of PI regulator are achieved. The system was simple and reliable.

关 键 词：无刷直流电动机 无位置传感器 电流闭环控制 实验 

分 类 号：TM361[电气工程—电机]