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.
出处
《电机技术》
2008年第5期20-23,共4页
Electrical Machinery Technology
