滑模變結(jié)構(gòu)的BLDCM直接轉(zhuǎn)矩控制系統(tǒng)研究

為了減小無刷直流電機(jī)（BLDCM）控制系統(tǒng)的轉(zhuǎn)矩脈動(dòng)和提高快速動(dòng)態(tài)響應(yīng)能力，本文提出了一種無刷直流電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)的實(shí)現(xiàn)方法，并將滑模變結(jié)構(gòu)控制策路引入無刷直流電機(jī)直接轉(zhuǎn)矩控制系統(tǒng)中，用滑模變結(jié)構(gòu)速度控制器來代替?zhèn)鹘y(tǒng)的PI 速度控制器。仿真實(shí)驗(yàn)結(jié)果表明該方案是可行的，有效地減抑制了無刷直流電機(jī)的轉(zhuǎn)矩脈動(dòng)，并改善了系統(tǒng)的動(dòng)、靜態(tài)運(yùn)行性能。
關(guān)鍵詞：直接轉(zhuǎn)矩控制；無刷直流電機(jī)；滑模變結(jié)構(gòu)
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