摘要：本文的研究对象为中低转速的无刷直流电机驱动系统，根据三相霍尔位置传感器输出信号的相位特征，分析了其可能出现的故障模式及其对电机工作性能的影响，改进了原有霍尔位置传感器故障检测方法，并提出了一种基于霍尔位置信息本身相位特点的转子位置信息容错控制方法。采用Mtalab/Simulink仿真与实验，对容错控制方法进行了验证。通过实验与仿真结果，根据电机在故障状态切换过程中，三相电流、转速和电磁转矩等主要参数的变化规律，给出了该方法对电机性能的影响分析及其优缺点。本文提出的容错控制方法提高了无刷直流电动机转子位置信息获取的可靠性。
关键词：无刷直流电机;霍尔位置传感器;转子位置信息
Abstract: The research object of this thesis is brushless DC motor control system operating in moderate or low speed. According to the output signal characters of hall position sensor, the possible failure modes and their impact on the motor performance were analyzed. Besides, this paper proposed a faulttolerant control of the rotor position information based on the phase characteristics of hall position information, which improves the previous hall position sensor faultdetection method. The faulttolerant method was verified in the Mtalab/Simulink simulation. Through the experiment and simulation results, the paper analyzed the effect of the method on the motor performance and its advantages and disadvantages based on the changing rule of main parameters during the process of fault state switch, such as three phases current, electromagnetic torque and rotational speed, etc. The proposed faulttolerant control provided an effective way to get the brushless DC motor rotor position information more reliable.
Key words: brushless DC motor; Hall position sensor; rotor position information