ABSTRACT
A salient permanent magnet synchronous motor (PMSM) excels as a further component of the reluctance torque in the torque equation compared to the surface-mounted permanent magnet–type machine because there is a difference in the stator inductance of the air gap. As a result, the control strategies of the surface-mounted type need additional modification to the internal permanent magnet synchronous machine. Therefore, the field-oriented control strategy explained in Chapters 3 and 4 is modified in this chapter to achieve a high dynamic performance of the interior PMSM drives while operating in the flux-weakening region. In this chapter, the genetic optimization algorithm selects the optimal parameters of the proportional-integral (PI) controllers of the control system. The improved cost function is presented in this chapter based on the models of the salient PMSM while the modification of the control method involves the limiter of the outer control loops to defeat the overshoot of the speed and stator currents. Lastly, this chapter presents the modified flux-weakening control scheme and its dynamic performance compared to the traditional control method based on the simulation and experimental results.
