无刷直流电机在PWM调制下的研究

The Research of Brushless DC Motor on PWM Method

文章以无刷直流电机(BLDCM)双闭环调速系统为基础,分析脉宽调制(PWM)方式对三相六状态二二导通BLDCM控制系统的影响,提出了在PWM-ON-PWM(前30°和后30°进行PWM控制,中间60°保持恒通)方式下的转矩脉动补偿,并且将传统PI控制器用模糊PI控制取代。建立了仿真模型,采用Matlab/Simulink软件进行了仿真实验。结果表明,该控制不但能够完全消除非换相期间由于关断相出现电流而引起的电磁转矩脉动,还能够补偿由于换相而引起的转矩脉动。

Based on brushless DC motor （BLDCM） double-loop speed control system, this paper systematically analyzes pulse-width modulation （PWM） mode through the impact BLDCM control system for three-phase six states twenty-two, torque ripple compensation proposed under PWM-ON-PWM （former 30° and 30° after the PWM control, the middle 60° to keep reach） mode, and replace the conventional PI controller with fuzzy PI control, Built up the simulation model of the system and performed an experiment to the system with Matlab/Simulink, The results show that the control is not only able to completely eliminate the electromagnetic torque ripple due to the shutdown phase occurs during the non-current caused by commutation, but also be able to fully compensate for the torque ripple caused due to the commutation,