Model-Based Minimum Total Loss Control of Interior Permanent Magnet Synchronous Motor

摘要

Increasing motor operating efficiency potentially reduces energy consumption and radiator requirements. In some applications, the motor's operating efficiency may even be the most important factor to be considered. The model-based minimum total loss control (MTLC) we proposed could potentially improve motor efficiency by taking copper and iron loss into account based on the motor model, finding the minimum power point, and enabling the permanent magnet synchronous motor achieve optimal efficiency at different speeds. Copper loss under MTLC increased less than the maximum torque per ampere (MTPA), but iron loss under MTLC was much lower than MTPA, reducing total loss. MTLC reduced total loss by adjusting the relation between copper and iron loss using a demagnetization current. Analysis and simulation results show that our proposal improved the efficiency of the permanent magnet synchronous motor effectively, making it easy to implement in practical control with little calculation.