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학술지 Integrated Sliding-Mode Sensorless Driver with Pre-driver and Current Sensing Circuit for Accurate Speed Control of PMSM
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저자
허세완, 오지민, 김민기, 석정희, 양일석, 박기태, 김진성
발행일
201512
출처
ETRI Journal, v.37 no.6, pp.1154-1164
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.15.0115.0365
협약과제
14PB1500, BLDC 모터용 고전압/대전류 파워모듈 및 ESD 기술개발, 양일석
초록
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 횓m 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.
키워드
Back-EMF estimation, BLDC motor, PMSM, Sensorless control, Sliding-mode observer, SMO, Speed error
KSP 제안 키워드
Back-emf estimation, High accuracy, Isolation technique, Level shifter, Motor Controller, PMSM Drive, Permanent Magnet Synchronous Motor(PMSM), Phase current, Power device, Rotor position, Sensing circuit