• 论文 •

### 磁悬浮反作用飞轮无刷直流电机转矩脉动抑制策略

1. 北京航空航天大学仪器科学与光电工程学院, 北京 100083
• 收稿日期:2015-07-06 出版日期:2016-07-20 发布日期:2016-07-29
• 通讯作者: 汤继强,Tel.: 010-82339273 E-mail: tjq_72@163.com E-mail:tjq_72@163.com
• 作者简介:汤继强 男,博士,副教授。主要研究方向:磁悬浮飞轮及磁悬浮控制力陀螺技术。Tel.: 010-82339273 E-mail: tjq_72@163.com;王营许 男,硕士研究生。主要研究方向:磁悬浮飞轮无刷直流电机控制。E-mail: wangyingxu@buaa.edu.cn
• 基金资助:
国家自然科学基金（61174003，61473018，61403015）

### Torque ripple reduction strategy for magnet suspended reactive flywheel brushless DC motor

TANG Jiqiang, WANG Yingxu, ZHOU Xinxiu

1. School of Instrumentation Science & Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
• Received:2015-07-06 Online:2016-07-20 Published:2016-07-29

Abstract: Due to its high torque response speed, direct torque control (DTC) without flux feedback makes the torque ripple reduction of magnet suspended reactive flywheel (MSRF) brushless DC motor (BLDCM) possible, which has a small inductance. However, the bang-bang controller of the DTC causes high torque ripples. To solve this problem, the mathematic models of commutation and diode freewheeling of the inactive phase were established and the relationship between torque and phase current was obtained.Then a torque prediction method based on the established models was proposed to reduce the torque ripple effectively, and the stability and robustness were proved. While estimating the back electromotive force of the BLDCM with sliding mode observer (SMO), a smooth and continuous function with one parameter was employed to replace the sign function which leads to a higher back electromotive force estimation accuracy. Simulation and experimental results show that compared to the traditional DTC, the advanced torque control method with torque prediction and advanced SMO can significantly suppress the torque ripples and has almost the same torque response speed.