两相无轴承电动机驱动拓扑及控制策略优化设计  

Optimal Design of Drive Topology and Control Strategy for Two-Phase Bearingless Motor

作　　者：陆冬 丁强 李正龙[2] LU Dong;DING Qiang;LI Zhenglong(School of Electrical Engineering,Nanjing Vocational University of Industry Technology,Nanjing 210023,China;College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京工业职业技术大学电气工程学院,南京210023 [2]南京航空航天大学自动化学院,南京211106

出　　处：《轴承》2024年第7期72-79,共8页Bearing

基　　金：国家自然科学基金资助项目(51677087)。

摘　　要：从逆变拓扑选型、调制策略设计及调节器结构优化3个角度出发,对两相无轴承电动机驱动系统进行优化设计。详细对比分析了两相无轴承电动机的逆变拓扑形式,为保证电动机高性能运行的同时尽可能降低硬件成本,采用交错并联式逆变拓扑结构;在此基础上,提出了一种基于交错并联式拓扑的双空间矢量脉宽调制策略,并给出了详细的设计过程;为进一步提升无轴承电动机驱动系统的动/稳态性能,基于无差拍思想提出了一种混合型调节器结构优化设计方案,该方案针对无差拍的控制延迟问题,采用基于史密斯预估器的电流预测方案补偿延时影响,对于参数误差问题,对d,q轴电流分别采取适合各自特点的控制策略,并利用误差累积效应补偿参数误差造成的电流跟踪静差;最后,使用无轴承试验样机的仿真及试验验证了所提驱动系统优化设计方案的有效性。From perspectives of inverter topology selection,modulation strategy design and regulator structure optimization,the optimal design of drive system for two-phase bearingless motor is carried out.A detailed comparative analysis is conducted on inverter topology form of the motor.In order to ensure the high-performance operation of the motor and reduce the hardware costs as much as possible,an interleaved parallel inverter topology structure is adopted.On this basis,a dual space vector pulse width modulation strategy is proposed based on interleaved parallel topology,and the detailed design process is provided.In order to further improve the dynamic/steady-state performance of drive system for the motor,an optimal design scheme for structure of hybrid regulator is proposed based on idea of deadbeat.The scheme addresses the control delay problem of deadbeat and adopts the current prediction scheme based on Smith predictor to compensate for delay effect.For parameter error problem,the control strategies suitable for respective characteristics of d and q axis currents are adopted,and the error accumulation effect is used to compensate for static error of current tracking caused by parameter errors.Finally,the effectiveness of the proposed scheme for optimal design of drive system is verified through simulation and test using a bearingless test prototype.

关 键 词：滑动轴承 磁力轴承 电动机 调节器 控制策略 电流 

分 类 号：TH133.31[机械工程—机械制造及自动化] TP273[自动化与计算机技术—检测技术与自动化装置]