Transactions of China Electrotechnical Society  2022, Vol. 37 Issue (19): 4938-4946    DOI: 10.19595/j.cnki.1000-6753.tces.221274
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Rotor Initial Position Identification Technology for Long Cable Drive System of Permanent Magnet Synchronous Motor Considering Resonance Suppression
Chen Dongdong, Wang Jin, Li Zibo, Zhou Libing
State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

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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 wordsPermanent magnet synchronous motor      initial position identification      active damping      resonance suppression     
Received: 30 June 2022     
PACS: TM351  
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Chen Dongdong
Wang Jin
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Zhou Libing
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Chen Dongdong,Wang Jin,Li Zibo等. Rotor Initial Position Identification Technology for Long Cable Drive System of Permanent Magnet Synchronous Motor Considering Resonance Suppression[J]. Transactions of China Electrotechnical Society, 2022, 37(19): 4938-4946.
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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.221274     OR     https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I19/4938
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