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Journal Article Integrated Sliding-Mode Sensorless Driver with Pre-driver and Current Sensing Circuit for Accurate Speed Control of PMSM
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Authors
Sewan Heo, Jimin Oh, Minki Kim, Jung-Hee Suk, Yil Suk Yang, Ki-Tae Park, Jinsung Kim
Issue Date
2015-12
Citation
ETRI Journal, v.37, no.6, pp.1154-1164
ISSN
1225-6463
Publisher
한국전자통신연구원 (ETRI)
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.4218/etrij.15.0115.0365
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 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.
KSP Keywords
Back Electromotive Force, High accuracy, Isolation technique, Low speed, Motor Controller, PMSM Drive, Permanent Magnet Synchronous Motor(PMSM), Phase current, Power device, Rotor position, Sensing circuit