The State Error PCH Control Algorithm with Damping Regulator and Its Application to Speed Tracking in PMSM

摘要

In this paper, a state error port controlled Hamiltonian (PCH) control scheme is introduced for permanent magnet synchronous motors (PMSMs). The state error PCH control strategy consists of a state error PCH controller and a load torque estimator. The state error PCH controller capitalizes on the PMSM system’s PCH model to achieve better speed tracking with known and unknown load torque. The load torque estimator is developed to estimate the unknown load torque. Moreover, a damping regulator for state error PCH controller is proposed, which yields an improved dynamic performance. The equilibrium stability of the closed-loop system with damping regulator is verified. Simulation results for different situations highlight the performance of the proposed controller in load disturbance attenuation and speed tracking. Consequently, the improved state error PCH scheme characteristics make them a good candidate for applications in real-time PMSM drive systems.