一种无刷直流电动机的转子位置重构方法

针对无刷直流电机(BLDCM)中霍尔传感器位置分辨率较低的问题,提出了一种旋转矢量谐波解耦与正交锁相环相结合的位置重构方法。该方法首先通过Clarke变换将霍尔开关信号转换成霍尔旋转矢量,随后采用谐波解耦的方法除去旋转矢量中所包含的主要高次谐波,最后基于正交锁相环技术实现转子位置的重构。仿真实验结果表明,所提出的方法在位置重构方面具有很好的性能,相比于采用谐波解耦与变带宽滤波器相结合的方法,采用正交锁相环技术能获得更高的位置精度。

Rotor Position Reconstruction Method of BLDCM

To solve the problem of low resolution of Hall sensor position in brushless DC motor(BLDCM),a position reconstruction method is proposed combining Hall-rotating-vector harmonic-decoupling and quadrature phase-locked loop(QPLL).The Hall switch signal is converted into a Hall-rotating-vector by Clarke transformation,then the harmonic-decoupling method is used to eliminate the main high order harmonics contained in the Hall-rotating-vector,and the rotor position is reconstructed based on the quadrature phase-locked loop technology.The simulation results show that the proposed method has good performance in position reconstruction.Compared with the method of combining harmonic decoupling and variable bandwidth filter,QPLL technology can obtain higher position accuracy.