磁阻传感器在主动转向执行电动机中的应用

Application of magnetic sensor in actuator motor of vehicle active front steering system

为了将磁阻传感器应用于汽车主动前轮转向系统的变传动比执行电动机(无刷直流电动机)中,分析了系统对位置传感器的要求和磁阻传感器的工作原理,提出了用于无刷直流电动机控制系统的HMC1512磁阻传感器的信号处理算法,给出了信号处理流程图,并在Matlab/Simulink环境下建立了无刷直流电动机的三闭环控制模型和信号处理模型.仿真过程中,将控制模型的转角输出作为信号处理模型的输入,由信号处理模型计算电动机的转子位置、转角和转速信号,并与控制模型的相应信号进行对比仿真.结果表明:所计算得到的信号与控制模型自身的相应信号基本一致,验证了所设计的算法能够用来判断电动机转子的位置,也能用来计算电动机转子的转角和转速,为HMC1512在主动转向执行电动机中的应用提供了依据.

In order to apply magnetic sensor in brushless DC motors actuator of vehicle active front wheel steering（AFS） system with variable gear ratio（VGR） mechanism,signal processing algorithm for brushless DC motor（BLDCM） control system was proposed based on the analysis of system requirements for position sensor and working principle of HMC1512 sensor.Three-closed-loop control model of BLDCM and signal processing model were established in Matlab/Simulink.Based on the rotation angle from the simulation of control model,rotor position,rotation angle and rotation speed were calculated according to the signal processing model,and compared with the corresponding signals according to three-closed-loop control model.The results show that the calculation signals are basically consistent with the corresponding signals.It is proved that the algorithm can be used to identify the rotor position and calculate the rotation angle and rotation speed,which provides basis for the application of HMC1512 in the actuator motor of AFS.