Improved Damping Control Based on Hamiltonian-Energy Function with State-Observer for Permanent Magnet Synchronous Motor Drives

This paper presents an original control algorithm using Hamiltonian energy control for a permanent magnet synchronous motor (PMSM) drive. The algorithm addresses the challenge of constant power load (CPL), which can cause instability of the input DC bus. The Hamiltonian energy control incorporates a model-based estimation to handle the CPL. An exponentially stable state-observer calculates load torque and stator resistance, improving control efficiency. Moreover, the difference flatness approach is used to generate a current reference to compensate for speed error in the nonlinear drive system. Experimental validation is conducted on a 10kW PMSM using a dSPACE MicroLabBox controller card. The Experimental results demonstrate the proposed algorithm's effectiveness, exhibiting excellent performance even with parameter variations.