Certainty equivalence adaptive speed controller for permanent magnet synchronous motor

This paper designs a robust adaptive speed controller based on the certainty equivalence principle for a permanent magnet synchronous motor (PMSM). The proposed controller quickly adapts to the variation of model parameters and load torque, thus it does not need exact knowledge about system parameters. The proposed control system can guarantee good performance such as a fast transient response, a small steady-state error, and a good tracking capability. The proposed control algorithm is executed by using a TMS320F28335 floating point DSP. The simulation and experimental results are given to verify the effectiveness of the proposed method in the presence of the variation of system parameters and load torque.