无刷直流电机转子位置检测的新方法  

A New Method of Detecting for Rotor Flux Position of a Sensorless DC Motor

作　　者：陈瑜[1] 黄玉[1] 王兴华[1] 

机构地区：[1]山东大学,山东济南250061

出　　处：《微电机》2002年第5期26-29,共4页Micromotors

摘　　要：介绍了无刷直流电机无位置传感器转子位置检测的一种新方法。该方法利用非导通相反电势逻辑电平经逻辑处理后得到一脉冲列 ,采用 PL L 锁相技术将脉冲列倍频 ,通过倍频电路计数器的计数值可以精确检测转子位置。利用数字比较技术将计数值与锁存器中的预置数值比较 ,可以精确控制绕组电流的最佳换向时刻。通过调节锁存器中的预置值可以方便地调节换向角 ,非常适用于无刷直流电机的各种控制算法。同时该方法克服了外同步起动过程中易产生的振荡和失步现象。通过实验证明该方法是正确的。This paper describes a novel method of detecting for rotor flux position of the brushless DC motor (BLDCM).This method, a pulse line is acquired from electromagnetic force signals in the motor windings that carry no current. Using PLL technology multiples the pulse. Thye numerical value of counter in multiple-frequency circuit correlates to the position of rotor flux. Comparing the figure of counter with that which is prestored in flip-latch, the best commutation time can be accurately determined.The commutation angle can be flexibly adjusted by varying the prestored figure in flip-latch. This is very fit for multifarious arithmetic of BLDCM.The hunting and out-of -step are conquered in the process of start. Experimental results confirm the correctness and effectiveness of this method.

关 键 词：无刷直流电机 转子 位置检测 位置传感器 

分 类 号：TM33[电气工程—电机]