Improved bearingless slice motor direct torque control strategy

The invention discloses an improved bearingless slice motor direct torque control strategy, which adopts a flux linkage observation model under a dq coordinate system to replace a flux linkage observation model under a traditional alpha-beta coordinate system, calculates flux linkage by using a stea...

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Hauptverfasser: WANG XIAOLIN, PENG XUHENG, WANG MINGYUE, SHI TENGRUI, BAO XUCONG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention discloses an improved bearingless slice motor direct torque control strategy, which adopts a flux linkage observation model under a dq coordinate system to replace a flux linkage observation model under a traditional alpha-beta coordinate system, calculates flux linkage by using a steady-state quantity, and solves the problems of poor running performance and difficult starting in a low-speed region of traditional direct torque control. On the basis, with maximum electromagnetic torque output as a target, an improved direct torque control strategy based on flux linkage/torque decoupling is provided. The bearingless slice motor control system under the control strategy is good in low-speed operation performance and easy to start, and the problems of torque pulsation and flux linkage pulsation existing in traditional direct torque control are restrained to a certain extent. 本发明公开了一种改进型无轴承薄片电机直接转矩控制策略,采用dq坐标系下的磁链观测模型代替传统αβ坐标系下的磁链观测模型,利用稳态量计算磁链,解决了传统直接转矩控制低速区运行性能差、起动困难的问题。在此基础上,以最大电磁转矩输出为目标,提出一种基于磁链/