PWM调制方式对无刷直流电机控制性能的影响  

Influence of PWM Modulation on Control Performance of Brushless DC Motor

作　　者：费文娟 邵定国[1] FEI Wenjuan;SHAO Dingguo(School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学机电工程与自动化学院,上海200072

出　　处：《微电机》2018年第8期55-60,共6页Micromotors

摘　　要：PWM调制方式的不同导致电流回路及续流回路不同,从而在功率管损耗、转矩脉动、电机控制及起动性能方面都会产生不同的影响。本文通过对导通相和非导通相的电流续流回路进行分析,得出了不同的调制方式对电枢电流和电磁转矩的影响也是不同的,并计算出了两类调制方式占空比之间的关系。从而分析出了不同PWM调制方式对电机起动性能和调速控制的影响。通过仿真及实验平台验证了结论的正确性。The different PWM modulation modes result in different current loops and freewheeling loops, which can have different effects on power loss, torque ripple, motor control and start-up performance.In this paper,bying analyzing freewheeling circuit through the conduction phase and non-conduction phase, made the conclusion that the influence of the different modulation modes on the armature current and the electromagnetic torque was also different,and the relationship between the duty ratio of the two kinds of modulation modes was calculated. The influence of different PWM modulation methods on moter starting performance and speed control was analyzed.Simulation and experimental results show that the conclusion is right.

关 键 词：无刷直流电机 PWM调制方式 续流回路 

分 类 号：TM361[电气工程—电机] TP272[自动化与计算机技术—检测技术与自动化装置]