PMSM model's reform in SIMULINK and application in parameters' identification

Although permanent magnet synchronous motor (PMSM) in SIMULINK is widely used in the simulation of speed regulation, its disadvantages such as the motor parameters not being dynamically modified and the coordinates transformation not being consistent with conventional logic bring researchers a lot of troubles. Based on the analysis of the PMSM mathematical model, this paper put forward two improved methods and provided the operated procedure and method in detail. The first was to modify the library file according to the demands and the second was to customize the PMSM model. Both of them were simple and effective with their advantages. The two methods were proved correct by simulation and the second was applied successfully in the simulation of parameter identification with model reference adaptive identification (MRAI) algorithm. Simulation results show that, with great practicality for variable structures and parameters systems in the dynamic simulation, the improved models cover the shortages of original PMSM model, and extend the application of PMSM model.