Journal of Power Electronics

  • 제21권1호
  • /
  • Pages.126-141
  • /
  • 2021
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  • 1598-2092(pISSN)
  • /
  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
권호 표지
DOI QR코드

DOI QR Code

Robust voltage model flux estimator design with parallel vector compensator for sensorless drive of induction motors

  • Jo, Gwon-Jae (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Choi, Jong-Woo (Department of Electrical Engineering, School of Electronic and Electrical Engineering, Kyungpook National University)
  • 투고 : 2020.05.07
  • 심사 : 2020.08.31
  • 발행 : 2021.01.20
⟨ 이전 논문 다음 논문 ⟩

초록

Flux estimator (FE) is critical for achieving high-performance sensorless drive of induction motors. A voltage model (VM) is an excellent candidate for a FE since it does not require speed information and has a simple structure. A VM using a closed-loop style has excellent sensorless drive capability over a wide speed range. However, it is limited by the uncertainties such as offset and parameter mismatch. This paper presents an improved a closed-loop style FE. To overcome the problems inherent in the conventional FE, a hybrid strategy for the changeover between control modes is applied. In the setting of the FE's cutoff frequency (CF), the influences of the offset and parameter mismatch are analyzed. The phase distortion and acquisition of the back electromotive force are also analyzed. From this analysis, a vector compensation strategy for the flux linkage is applied. This strategy facilitates the CF setting, which improves the robustness against both the offset and parameter mismatch. Finally, the effectiveness of the proposed FE in a sensorless driven induction motor is verified using simulations and experiments under various conditions.

키워드

과제정보

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1I1A3A01061431).

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