Predictive Current Control Using Identification of Current Ripple

This paper presents a new time-discrete predictive current control for permanent-magnet synchronous motor (PMSM) which follows a reference step in two sampling periods. The control stands out by using a permanent identification which allows fast control even if the motor parameters are changing. The identification analyzes the current response of each switch state of the voltage source inverter. This kind of identification works without any test signals. The proposed new predictive current control will be described in detail. The simulation results show the feasibility and effectiveness of the proposed controller, compared to proportional integral control and dead-beat control in the rotor synchronous frame. Furthermore, the new control strategy will be verified in experiments. The control hardware only needs a field-programmable gate array and analog-to-digital converters. To verify the control, a prototype 14 kW PMSM servo-drive system is used.