一种转子位置传感器无刷直流电机速度检测方法

本文提出了一种利用转子位置传感器发出的信号测量无刷直流电机（BLDC）转速的方法，并设计了相应的转动方向测定电路和数字PI速度控制器模块。通过利用比例积分控制器计算半个转动周期内的两次连续测量值，结合提出的转动方向测定电路和数字PI速度控制器，可以得出具有双倍测量频率的转子转动周期的准确值。最后将提出的方法在FPGA平台进行了实现，并与真实数据的对比表明，该算法在无换向器直流电机上可以获得具有高精度及高频率的速度测量值（每转动1周至少测量6次）。

A brushless DC motor speed detection method based on position sensor

This paper presents a signal measurement issued by using rotor position sensor of Brushless DC motor (BLDC) speed method, and the design of the rotation direction of the corresponding measurement circuit and digital PI speed controller module. Through the calculation by proportional integral controller for half a rotation period of two consecutive measurements, combined with the direction of rotation measurement circuit and digital PI speed controller is proposed, the exact value can be obtained with double rotor rotation cycle frequency measurement. The proposed method on the FPGA platform is realized, and show that compared with the real data, the algorithm can get high accuracy and high speed frequency measurements in commutatorless DC motor (every 1/6th of the rotor rotation).