基于磁场定向控制理论的无刷直流电机控制

磁场定向控制(FOC)理论是永磁同步电机(PMSM)最常用的控制方法之一。该方法需要电机转子瞬时精确位置,因此限制了其在使用霍尔位置传感器的无刷直流电机(BLDCM)上的应用。为了能够在BLDCM上应用FOC理论,又不增加电机成本,在现有霍尔位置传感器的基础上,提出了一种根据霍尔传感器的输出信号,通过计算前一个扇区平均转速的方法估计转子精确位置。使用MATLAB/Simulink软件对该估算方法进行了仿真,并搭建了以TI 的TMS320F28069 DSP为核心的试验系统,通过自动代码生成技术完成算法的编程,可以较好地应用于BLDCM的控制,在一些应用场合可以代替PMSM从而降低使用成本。

Brushless DC Motor Control Based on Field Oriented Control Theory

Field oriented control (FOC) theory was the most common control method for permanent magnet synchronous motor (PMSM), which required instantaneous position of the rotor. This limited its application to brushless DC motor (BLDCM) using Hall position sensors. In order to apply the FOC theory to the control of BLDCM without increasing the cost of the motor, based on the existing Hall position sensor, an estimation method of the rotor precise position by calculating the average speed of the previous sector based on the output signal of the Hall sensor was proposed. This estimation method was simulated using MATLAB/Simulink software. The experimental system based on TMS320F28069 DSP was built. The algorithm was programmed by automatic code generation technology. Both simulation and experiment results showed that the method could be used well in the control of BLDCM, and it could replace PMSM in some low cost applications.