Journal of Power Electronics

  • 제19권5호
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  • Pages.1224-1234
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  • 2019
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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Seamless Transition Strategy for Wide Speed-Range Sensorless IPMSM Drives with a Virtual Q-axis Inductance

  • Shen, Hanlin (School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Xu, Jinbang (School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Yu, Baiqiang (School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Tang, Qipeng (College of Electrical Engineering, Zhejiang University) ;
  • Chen, Bao (School of Artificial Intelligence and Automation, Huazhong University of Science and Technology) ;
  • Lou, Chun (State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology) ;
  • Qiao, Yu (State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology)
  • 투고 : 2018.11.30
  • 심사 : 2019.04.19
  • 발행 : 2019.09.20
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초록

Hybrid rotor position estimation methods that integrate a fundamental model and high frequency (HF) signal injection are widely used for the wide speed-range sensorless control of interior permanent-magnet synchronous machines (IPMSMs). However, the direct transition of two different schemes may lead to system fluctuations or system instability since two estimated rotor positions based on two different schemes are always unequal due to the effects of parameter variations, system delays and inverter nonlinearities. In order to avoid these problems, a seamless transition strategy to define and construct a virtual q-axis inductance is proposed in this paper. With the proposed seamless transition strategy, an estimated rotor position based on a fundamental model is forced to track that based on HF signal injection before the transition by adjusting the constructed virtual q-axis inductance. Meanwhile, considering that the virtual q-axis inductance changes with rotor position estimation errors, a new observer with a two-phase phase-locked loop (TP-PLL) is developed to accurately obtain the virtual q-axis inductance online. Furthermore, IPMSM sensorless control with maximum torque per ampere (MTPA) operations can be tracked automatically by selecting the proper virtual q-axis inductance. Finally, experimental results obtained from an IPMSM demonstrate the feasibility of the proposed seamless transition strategy.

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참고문헌

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