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

The Korean Institute of Power Electronics (전력전자학회)
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Improved Responsiveness of Model-Based Sensorless Control for Electric-Supercharger Motor using an Position Error Compensation

위치 오차 보상을 통한 전동식 슈퍼차저 모터의 모델 기반 센서리스 응답성 개선

  • Park, Gui-Yeol (Hyundai Wia Co. PT Electric System Development Team) ;
  • Hwang, Yo-Han (Hyundai Wia Co. PT Electric System Development Team) ;
  • Heo, Nam (Hyundai Wia Co. PT Electric System Development Team) ;
  • Lee, Ju (Dept. of Electrical Eng., Hanyang University)
  • Received : 2018.08.21
  • Accepted : 2018.10.17
  • Published : 2019.02.20
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Abstract

Sensorless electric superchargers have recently been actively developed to provide a large amount of oxygen to engines in order assist the combustion process for miniaturizing the engines and improving fuel efficiency. The model-based sensorless method for surface-mounted permanent magnet synchronous motors has a disadvantage in that the system may become unstable due to parameter variations in low-speed operation and the rapid-acceleration section. An electric supercharger requires fast response to improve the engine response delay, such as the turbocharger turbo-rack. Therefore, the responsiveness must be improved to use the model-based sensorless system. The position compensation algorithm designed in this study is controlled by converting the position error into the beta, which is the angle formed by the d-axis and the stator current during sudden speed change. In this study, we improved the response of the model-based sensorless system through the algorithm and verified the algorithm validity by applying the algorithm to an actual dual-motor supercharger.

Keywords

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Fig. 1. Relationship between d - q and γ - δ reference frames.

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Fig. 2. Control block diagram of PMSM including position sensor fault tolerance control.

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Fig. 3. Sensorless drive simulation at rapid acceleration.

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Fig. 7. Enlargement of waveform with simulation of sensorless drive duration rapid acceleration with position compensation algorithm.

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Fig. 10. Sensorless FOC operation sequence.

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Fig. 8. Test image of high-voltage electric supercharger.

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Fig. 9. Test image of high-voltage dual electric supercharger.

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Fig. 12. Sensorless FOC operation test waveform at rapid acceleration.

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Fig. 13. Enlargement of waveform with sensorless FOC operation test waveform at rapid acceleration.

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Fig. 4. Enlargement of waveform with sensorless drive simulation at rapid acceleration.

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Fig. 5. Position compensation algorithm.

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Fig. 6. Simulation of sensorless drive during rapid acceleration with position compensation algorithm.

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Fig. 11. Sensorless FOC operation test waveform.

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Fig. 14. Sensorless operation test waveform for rapid acceleration with position compensation algorithm.

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Fig. 15. Sensorless operation test enlargement waveform for rapid acceleration with position compensation algorithm.

TABLE I SPECIFICATION FOR DUAL e-SUPERCHARGER

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References

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