Hysteresis Model Predictive Current Control for PMSM With LC Filter Considering Different Error Shapes

Abstract

This paper investigates three-phase two-level VSI hysteresis-based Model Predictive Control (MPC) for permanent magnet synchronous machines with different current error shapes. To limit the motor current harmonics and prevent overheating of the magnets, motor filters (mostly LC filters) are often used. The hysteresis-based MPC is investigated to provide high dynamic performance and limit the size of the filter. To compensate the resonance introduced by the LC filter and to improve system efficiency, a virtual resistor active damping strategy is implemented. To avoid additional sensors, the filter states are determined by a Luenberger Observer. However, up to now these strategies have never been investigated together with MPC and different current error shapes for motor applications. Simulation results for the different strategies prove the performance efficiency and experimental tests verify the results in a laboratory environment.

Keywords

• Current control
• permanent magnet motors
• predictive control
• LC filter
• variable speed drives