전력전자학회논문지 (The Transactions of the Korean Institute of Power Electronics)

  • 제25권5호
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  • Pages.395-403
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  • 2020
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  • 1229-2214(pISSN)
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  • 2288-6281(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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V/f 스칼라 제어 영구자석 동기 전동기의 안정적 초기 구동 기법

A Stable Startup Method of V/f Scalar Controlled Permanent Magnet Synchronous Motors

  • Kim, Hyeon-Seong (Dept. of Mechatronics Engineering, Incheon Nat'l University) ;
  • Lee, Sang-Min (Dept. of Mechatronics Engineering, Incheon Nat'l University) ;
  • Lee, Kibok (Dept. of Mechatronics Engineering, Incheon Nat'l University)
  • 투고 : 2020.07.17
  • 심사 : 2020.08.21
  • 발행 : 2020.10.20
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초록

This study presents a stable start-up strategy for v/f scalar-controlled permanent magnet synchronous motors (PMSMs). The v/f-controlled PMSMs easily lose synchronism under low-speed conditions if an insufficient stator voltage is applied to the machine due to errors in measured motor parameters and inverter nonlinearity, such as inverter dead time and on-state voltage drop. The proposed method adopts the I/f control method to ensure a stable start at low speeds and then switches to the v/f control method at medium speeds. A smooth transition method from I/f control to v/f control is proposed to minimize the oscillation of the stator current and rotor speed during transition. Moreover, the stability of the I/f and v/f control methods is analyzed using a small-signal model. Simulation and experimental results are provided to verify the performance of the proposed control strategy.

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참고문헌

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