9.5 Summary
This chapter presents the application of MPC for the control of permanent magnet synchronous motors. Two control schemes are presented, a field-oriented control scheme with a predictive current controller and a predictive speed control scheme.
The predictive current control is similar to the one presented in Chapter 4, but in this case it is implemented in the rotating reference frame. In this way, one of the current components is proportional to the electrical torque and the other is proportional to the reactive power. The current references are generated by an external speed control loop.
The predictive speed control does not use any external speed control loop and the speed is directly controlled by the predictive controller. This application is a very good example of how different variables and different control objectives and restrictions can be included in the MPC scheme, resulting in a high dynamic performance of the system.
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