提高永磁同步电机鲁棒性的有源阻尼控制方法

微特电机 ›› 2022, Vol. 50 ›› Issue (2): 52-58.

提高永磁同步电机鲁棒性的有源阻尼控制方法

孙明翰

北京工业大学信息学部,北京 100124

收稿日期:2021-11-08 出版日期:2022-02-28 发布日期:2022-02-25
作者简介:孙明翰(1996—),男,硕士研究生,研究方向为电机驱动控制系统。

Active Damping Control Method for Improving the Robustness of Permanent Magnet Synchronous Motor Based on Pre LC Filter

SUN Minghan

Information Department, Beijing University of Technology, Beijing 100124, China

Received:2021-11-08 Online:2022-02-28 Published:2022-02-25

摘要/Abstract

摘要： 考虑控制延时的情况下,利用复阻抗法分析电容电流反馈有源阻尼等效电阻和电抗的影响,电机在运行过程中电阻和电感变化,导致谐振频率移动至负阻性区间,进而降低了系统稳定性。提出一种带有补偿系数的延时补偿方法,一方面通过延时补偿环节来降低控制延时所带来的影响,拓宽了等效电阻的有效阻尼区间,有效区间由(0~1/6f_s)变为(0~1/2f_s),另一方面通过补偿系数在兼顾快速性与稳定性的基础之上改善了系统的稳定裕度,提高了应对数字控制所带来的延时以及电机参数的宽范围变化所带来的负面影响。搭建Simulink仿真模型,仿真结果表明,该方法可提高该电机参数变化的鲁棒性、降低谐波含量、提高稳态性能。

关键词: 电容电流反馈, 控制延时, 复阻抗法, 延时补偿

Abstract: Considering the control delay, the complex impedance method was used to analyze the influence of capacitive current feedback active damping equivalent resistance and reactance. During the operation of the motor, the change of resistance and inductancecaused the resonant frequency to move to the negative resistance range, which reduced the stability of the system. A delay compensation method with compensation coefficient was proposed. The influence of control delay was reduced by delay compensation link, and the effective damping interval of equivalent resistance was widened, so that the effective interval was changed from (0~1/6f_s) to (0~1/2f_s). On the other hand, the stability margin of the system was improved by compensation coefficient on the basis of considering rapidity and stability,which improved the ability to deal with the negative impact of time delay caused by digital control and wide range change of motor parameters. The Simulink simulation model was built to verify the advantages of the proposed method in improving the robustness of motor parameter changes, reducing the harmonic content and improving the steady-state performance.

Key words: capacitive current feedback, control delay, complex impendance method, complex impendance delay compensation

中图分类号:

TM351

孙明翰. 提高永磁同步电机鲁棒性的有源阻尼控制方法[J]. 微特电机, 2022, 50(2): 52-58.

SUN Minghan. Active Damping Control Method for Improving the Robustness of Permanent Magnet Synchronous Motor Based on Pre LC Filter[J]. Small & Special Electrical Machines, 2022, 50(2): 52-58.

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