无刷直流电机两种测速方法研究

The Research of Two Speed Detection Methods for Brushless DC Motor

对于无刷直流电机的稳速和调速系统,性能优越的速度检测措施是电机转速闭环控制的关键。文中介绍了基于霍尔信号的两种测速方法——频/压转换测速法和霍尔测频测速法,阐述了两种测速方法的原理,建立了无刷直流电机闭环控制系统的Matlab仿真模型;通过对计算及仿真结果的分析,对比了两种方法的测速性能及应用场合,为工程实践提供有力参考。

For the steady speed and speed control system of brushless DC motor, the effective speed detection measures is the key of the motor speed closed-loop control. This paper introduces two speed detection methods based on Hall signal, frequency-voltage convector （FVC） speed detection method, Hall signal frequency measurement （HFM） speed detection method, constitutes Matlab simulation model and verifies the correctness of the mathematical model. According to the operational principle and analysis of simulation result, the paper compares the velocity measurement performances and applications of two methods, has engineering practice significance.