基于SVPWM的BLDCM转子位置估算方法研究

Research on Estimation Method of BLDCM Rotor Position Based on SVPWM Controller

在采用电压空间矢量(SVPWM)控制策略的电机控制系统中,转子转速和位置估算极为重要。为提高估算精度,针对基于低分辨率位置传感器的电动车用无刷直流电机系统,提出了基于霍耳扇区时间跟随方法的电压空间矢量控制策略。随后,利用Matlab/Simulink仿真平台,建立了基于电压空间矢量控制策略的无刷直流电机仿真模型,仿真结果表明,霍耳扇区时间跟随算法与多区间平均测速法相比,实时性和动态性能较好,并且具有较强的抗干扰性。最后,搭建了以STM32F303为核心的实验平台,对提出的算法进行了实验验证,结果表明,该算法能够有效提高电机转子位置和转速估算精度。

As the SVPWM is applied to motor control system widely,the estimation of rotor speed and position isvital.To improve the accuracy of estimation,a SVPWM control strategy based on Hall sector time tracing algorithm wasproposed,which was aimed at electrombile BLDCM system upon low-resolution position sensors.Then,BLDCMsimulation model based on SVPWM control strategy was built by Matlab/Simulink.The simulation reveals that Hallsector time tracing algorithm has a good real-time and dynamic performance,and has strong anti-disturbance capacity,compared to measuring method of intervals average velocity.Finally,experimental platform based on STM32F303wasdesigned,and the proposed algorithm had been researched by experiments.Result validate the algorithm can increaseestimation accuracy of motor rotor speed and position.