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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Integrated Sliding-Mode Sensorless Driver with Pre-driver and Current Sensing Circuit for Accurate Speed Control of PMSM

  • Heo, Sewan (IT Convergence Technology Research Laboratory, ETRI) ;
  • Oh, Jimin (Information & Communications Core Technology Research Laboratory, ETRI) ;
  • Kim, Minki (Information & Communications Core Technology Research Laboratory, ETRI) ;
  • Suk, Jung-Hee (Information & Communications Core Technology Research Laboratory, ETRI) ;
  • Yang, Yil Suk (Information & Communications Core Technology Research Laboratory, ETRI) ;
  • Park, Ki-Tae (Iron Device Corporation) ;
  • Kim, Jinsung (Iron Device Corporation)
  • Received : 2015.04.21
  • Accepted : 2015.09.07
  • Published : 2015.12.01
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Abstract

This paper proposes a fully sensorless driver for a permanent magnet synchronous motor (PMSM) integrated with a digital motor controller and an analog pre-driver, including sensing circuits and estimators. In the motor controller, a position estimator estimates the back electromotive force and rotor position using a sliding-mode observer. In the pre-driver, drivers for the power devices are designed with a level shifter and isolation technique. In addition, a current sensing circuit measures a three-phase current. All of these circuits are integrated in a single chip such that the driver achieves control of the speed with high accuracy. Using an IC fabricated using a $0.18{\mu}m$ BCDMOS process, the performance was verified experimentally. The driver showed stable operation in spite of the variation in speed and load, a similar efficiency near 1% compared to a commercial driver, a low speed error of about 0.1%, and therefore good performance for the PMSM drive.

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References

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