滑模变结构的BLDCM直接转矩控制系统研究

为了减小无刷直流电机（BLDCM）控制系统的转矩脉动和提高快速动态响应能力，本文提出了一种无刷直流电机直接转矩控制系统的实现方法，并将滑模变结构控制策路引入无刷直流电机直接转矩控制系统中，用滑模变结构速度控制器来代替传统的PI 速度控制器。仿真实验结果表明该方案是可行的，有效地减抑制了无刷直流电机的转矩脉动，并改善了系统的动、静态运行性能。
关键词：直接转矩控制；无刷直流电机；滑模变结构
ABSTRACT: In order to reduce torque ripple and improve the response speed of BLDCM control system. This paper describes the application of direct torque control to BLDCM. And a new variable structure sliding mode control strategy with using sliding speed controller to replace the traditional PI speed controller was proposed in this paper. Simulation results show that the control method is reliable, reduces torque ripple and has effectively improved dynamic and static operation performances.
KEY WORDS: Brushless DC motor; Direct torque control; variable structure sliding mode