基于CPLD的反电势过零检测电路设计与应用  

Design and Application of Detecting Zero-Crossing Circuit of BEMF Based on CPLD

作　　者：胡 刘卫国[1] 韩英桃[1] 王燕娜[1] 

机构地区：[1]西北工业大学,陕西西安710072

出　　处：《微特电机》2010年第4期52-55,共4页Small & Special Electrical Machines

摘　　要：设计医疗牙钻用无位置传感器无刷直流电动机反电势过零点检测的硬件电路。详细分析反电势经过滤波后所产生的相移,并提出一种基于CPLD的软件补偿方法。通过实验,证明该电路检测到的反电势过零点信号有效、可靠,并且相移补偿方法正确、可行。Abstract： This paper presents the design of detecting zero-crossing circuit of BEMF in the sensorless BLDCM of tooth drill. The phase shifting which the filter brought to the circuit was analyzed in detail. A kind of software method of phase compensation was proposed based on CPLD. At last, the experiment proves that the zero-crossing signals of BEMF which are detected by the circuit are available and reliable, and that the method of phase compensation is viable and correct.

关 键 词：反电势 无刷直流电动机 无位置传感器 CPLD 

分 类 号：TM33[电气工程—电机]