无位置传感器无刷直流电机的换相控制  

The Commutation Controll of the Sensorless BLDC

作　　者：周群[1] 向加其[1] 

机构地区：[1]合肥威师智能电子电器厂,230037

出　　处：《电机技术》2008年第5期20-23,共4页Electrical Machinery Technology

摘　　要：阐述无位置传感器无刷直流电机的换相控制原理,对传统虚拟中性点法进行了分析,提出了在PWM关断阶段进行反电动势过零点检测的方案,并针对无刷直流电机在低速低电压应用上的不足,提出了改进电路。The commutation controlling principle of sensorless BLDC was discussed in this paper.By analysing the traditional virtual neutral point method, a method which detected the BEMF zero-crossing at PWM off phase was presented. The circuit was improved to solve the defect of BLDC motors in low-speed and low-voltage applications.

关 键 词：传感器 无刷直流电机 反电动势 过零点高速放大器 

分 类 号：TM33[电气工程—电机] TM925.12