為了減小無刷直流電機（BLDCM）控制系統的轉矩脈動和提高快速動態響應能力，本文提出了一種無刷直流電機直接轉矩控制系統的實現方法，并將滑模變結構控制策路引入無刷直流電機直接轉矩控制系統中，用滑模變結構速度控制器來代替傳統的PI 速度控制器。仿真實驗結果表明該方案是可行的，有效地減抑制了無刷直流電機的轉矩脈動，并改善了系統的動、靜態運行性能。
關鍵詞：直接轉矩控制；無刷直流電機；滑模變結構
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