多相永磁无刷直流电动机系统设计与协调控制

System Design and Coordinated Control of a Multiphase Permanent Magnet Brushless DC Motor

为满足低压大功率传动系统的应用需求,提出了一种多相永磁无刷直流电动机系统设计方案。分析了系统各个组成部分的设计特点和功率主电路换相工作原理。系统包含多个功能单元,相辅相成,为此采用CAN总线技术解决各功能单元之间的通信和协调控制问题,并根据控制系统结构和CAN总线的技术特点,探讨了提高数据通信可靠性的方法。利用Matlab/Simulink对功率主电路的工作原理,特别是强迫换相所引起的电流和转矩波动等问题进行了深入的仿真分析,并借助仿真进行了系统性能预估和主电路的参数选择,在此基础上完成了实验样机的研制。仿真和样机实验结果表明,该系统设计方案可行,所设计的多相永磁无刷直流电动机系统可为低压大功率传动系统设计提供参考。

To satisfy the demand of drive system for low-voltage high-power applications, a system solution of a multiphase permanent magnet brushless DC motor （PMBDCM） is presented in this paper. The operation principle and the primary design characteristic of the system are analyzed. The controller area network （CAN） bus technology is adopted to solve the problem of coordinated control resulted from the multiphase configuration, and the methods to improve the reliability of data traffic are discussed. The system simulation model is established using Matlab/Simulink, and the simulation is carried out to predict the system performance and choose the appropriate circuit parameters. The sample is manufactured and the experiment is put in practice. The feasibility of the proposed system solution is validated by the experimental results. And it offers an alternative solution for low-voltage high-power drive applications.