Journal of Electrical Engineering and Technology

  • 제12권1호
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  • Pages.100-109
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  • 2017
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Sensorless Control of PMSM by a Four-Switch Inverter with Compensation of Voltage Distortion and Adjustment of Position Estimation Gain

  • Kim, Byeong-Han (School of Electronic and Electrical Engineering, Hongik University) ;
  • Lee, Dong-Myung (School of Electronic and Electrical Engineering, Hongik University)
  • 투고 : 2016.03.03
  • 심사 : 2016.05.25
  • 발행 : 2017.01.02
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초록

This paper proposes performance improvement schemes for sensorless PMSM control drive using a four-switch three-phase inverter (so-called B4 inverter). In the proposed scheme, the back-EMF estimation-based sensorless control algorithm is used to control the brushless PMSM without position sensors. In order to have stable operation, this paper presents a gain adjustment scheme that compensates the reduction of stable sensorless operation range as long as the rotor speed increases. In B4 topology, the center point of dc-link capacitors is connected to 3-phase load, and it is prone to have the load current distortion. Hence, to mitigate this problem, a distortion compensation scheme by modifying voltage commands using measured dc-link potentials is proposed in this paper. The validity of the proposed method is evaluated by simulations and experiments.

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참고문헌

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