Integrated Sliding-Mode Sensorless Driver with Pre-driver and Current Sensing Circuit for Accurate Speed Control of PMSM

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 μm 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.

Adaptive fuzzy gain‐varying finite‐time command filtered backstepping control for permanent magnet synchronous motors with mismatched disturbances

“…Besides, the PMSMs systems are associated with load disturbances and time-varying parameters. Therefore, in order to get desirable control performance for PMSMs systems in practical application, the researchers have applied many advanced nonlinear control technologies to PMSMs systems including PI control, 2,3 backstepping control, [4][5][6][7] sliding mode control, [8][9][10] and other control algorithms. [11][12][13][14][15] In these new control methods, the backstepping control has provided an effective way to design controllers for PMSMs systems.…”