考虑谐振抑制的永磁同步电机长线缆驱动系统转子初始位置辨识技术

doi:10.19595/j.cnki.1000-6753.tces.221274

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摘要

在永磁同步电机长线缆驱动系统安装LC滤波器可能会引起谐振,导致转子初始位置辨识失败。主动阻尼控制能够抑制LC滤波器引起的谐振,从而保障转子初始位置辨识的成功。在估计的同步旋转轴系上注入高频电压信号,对高频电流响应解调后得到两种可能的结果,对应不同的极性。根据电机磁路的饱和效应,施加不同的直流电流激励并对比每种激励下的实验结果,可以完成极性辨别。在注入高频电压信号和施加直流电流激励的过程中,LC滤波器将引起系统谐振。针对这一问题,提出一种基于高通滤波器的主动阻尼控制方法,在传统电流环的基础上增加一个反馈通路,等效地增大谐振频率处的系统阻尼;然后进行主动阻尼控制方法的参数设计和稳定性证明;最后开展实验,得到成功抑制谐振后的实验结果,证明所提考虑谐振抑制的永磁同步电机长线缆驱动系统转子初始位置辨识技术的有效性。

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关键词 ：永磁同步电机, 初始位置辨识, 主动阻尼, 谐振抑制

Abstract：

Installing LC filter in the long cable drive system of permanent magnet synchronous motor may cause resonance, resulting in the failure of rotor initial position identification. Active damping control can suppress the resonance caused by LC filter, so as to ensure the success of rotor initial position identification. After injecting high-frequency voltage signal into the estimated synchronous rotating shafting and demodulating the high-frequency current response, two possible results are obtained, corresponding to different polarities. According to the saturation effect of the magnetic circuit of the motor, applying different DC current excitation and comparing the experimental results under each excitation can complete the polarity discrimination. In the process of injecting high-frequency voltage signal and applying DC current excitation, LC filter will cause system resonance. To solve this problem, an active damping control method based on high pass filter is proposed. A feedback path is added to the traditional current loop to increase the system damping at the resonant frequency equivalently, and then the parameter design and stability verification of the active damping control method are carried out. Finally, experiments are carried out to obtain the experimental results after successfully suppressing resonance, which proves the effectiveness of the proposed rotor initial position identification technology of permanent magnet synchronous motor long cable drive system considering resonance suppression.

Key words： Permanent magnet synchronous motor initial position identification active damping resonance suppression

收稿日期: 2022-06-30

PACS:

TM351

通讯作者: 王晋男,1979年生,副教授,硕士生导师,研究方向为大型与特种电机设计及其控制。E-mail：jinwang@hust.edu.cn

作者简介: 陈东东男,1995年生,博士研究生,研究方向为永磁电机无位置传感器控制。E-mail：ddchen@hust.edu.cn

引用本文:

陈东东, 王晋, 李子博, 周理兵. 考虑谐振抑制的永磁同步电机长线缆驱动系统转子初始位置辨识技术[J]. 电工技术学报, 2022, 37(19): 4938-4946. Chen Dongdong, Wang Jin, Li Zibo, Zhou Libing. Rotor Initial Position Identification Technology for Long Cable Drive System of Permanent Magnet Synchronous Motor Considering Resonance Suppression. Transactions of China Electrotechnical Society, 2022, 37(19): 4938-4946.

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