Transient Simulation of a Permanent Magnet Synchronous Motor utilizing V/f control aligned with the Park transform

Permanent magnet synchronous motors are widely used in industrial laboratories due to their high starting torque and efficiency compared to static induction machines. The growing interest can be explained by the development of permanent magnet magnetic materials. To evaluate the transient behavior of permanent magnet synchronous motors, a MATLAB model is considered based on the Parke transform to simplify the control strategy that implements voltage-to-frequency (V/f) ratio to maintain more stability during unsteady conditions and facilitate the analysis to track the machine action. Managing this transient phase is essential to prevent excessive inrush currents and ensure stability. This study rigorously examines the behavior of machines during two transition periods until they reach a steady state speed. The rise time (Tr) is the time it takes for a signal to change from (10 - 90) % of its final value. The transient speed duration of the first approach varies between 0.4 ms for the unloaded machine and performs longer duration time 0.7 ms under load conditions. The unloaded machine obviously responds faster than the loaded machine .The second, controlled approach has a limited duration time periods from 10.25 to 10.8 ms, with a rise time of Tr1 = 0.2ms and Tr2 = 2,5ms for both loads applied sequentially. The controlled machine demonstrates a shorter rise time which can be attributed to the same speed root forced to different load conditions. This approach highlighted the benefits of the inherent dc boost voltage to minimize transient effects in synchronous machine.