Transactions of China Electrotechnical Society  2019, Vol. 34 Issue (19): 4006-4016    DOI: 10.19595/j.cnki.1000-6753.tces.181144
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Rotor Initial Position Identification Based on the HF Orthogonal Square-Wave Voltage Injection
Jiang Yan, Liu Simei, Luo Derong, Huang Shoudao, Wu Xuan
College of Electrical and Information Engineering Hunan University Changsha 410082 China

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Abstract  In the field of interior permanent magnet synchronous motor(IPMSM) rotor initial position identification, the conventional methods are possible to lead a long convergence process or even a wrong convergence due to multiple zero points, and the magnetic polarity cannot be identified, so that the motor starts failure or even reverses. Therefore, a rotor position identification method based on high frequency(HF) orthogonal square wave voltage injection is proposed in this paper. Firstly, the HF voltage signals are injected into the stationary reference frame(SRF), and then the HF response currents in the SRF are used to identify the rotor magnetic pole position. Secondly, a low-frequency sinusoidal current signal is injected into d-axis to identify rotor magnetic polarity. Because the rotor position can be obtained directly by arc tangent function in this method, it does not need long time to converge. Finally, the proposed method is verified on the 1.5kW IPMSM system.
Key wordsPermanent magnet synchronous motor      rotor intial position identification      HF orthogonal square wave voltage injection      magnetic polarity identification     
Received: 02 July 2018      Published: 12 October 2019
PACS: TM341  
  TM351  
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Jiang Yan
Liu Simei
Luo Derong
Huang Shoudao
Wu Xuan
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Jiang Yan,Liu Simei,Luo Derong等. Rotor Initial Position Identification Based on the HF Orthogonal Square-Wave Voltage Injection[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4006-4016.
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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181144     OR     https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I19/4006
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