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In this paper, we design an adaptive sliding mode controller which is applied to optimal position tracking of threephase brushless DC motor. Considering the uncertainties and external disturbances of a three-phase brushless DC motor, we choose the sliding mode control (SMC) to be the major one. Normally we can’t figure out the motor’s uncertainty, so we propose an adaptive control to tune the motor’s uncertainty. The adaptive control could be able to handle the unknown uncertainties and disturbances. Then we proved the stability of system by Lyapunov function, and the simulate results showed that it has excellent performance.

Design of Optimal Position Controller for Three-Phase Brushless DC Motor Applying Adaptive Sliding Mode Control