Fast and Efficient PMSM Electromagnetic Parameter Identification Methodology from the Efficiency Map

This paper presents a fast and efficient methodology to extract the electromagnetic magnitudes of a PMSM from its torque-speed-efficiency map. Thus, having the efficiency distribution along the torque-speed region, the algorithm is able to determine the electromagnetic parameters of the PMSM with no any geometry analysis involved. A d-q electrical model is used to compute the PMSM performance. The electromagnetic magnitudes to be modelled are the stator winding resistance, iron losses and d-q linkage flux, which jointly with the d-q currents, allows determining the d-q inductances. This approach is well suited as a fast electromagnetic parameter identification method to determine the electromagnetic magnitudes with no prior knowledge of the PMSM geometry. The obtained data can be helpful to perform a customized control algorithm of the PMSM. If the motor is available, by testing different operating points and extracting the efficiency data, it is possible to extract full information about the electromagnetic characteristics of the PMSM while adjusting the control algorithm to improve the motor performance. Finally, the magneto-static magnitudes are validated by means of FEA, using the public experimental data available of Toyota Prius 2004 PMSM.