EM-Thermal Coupled Simulation Under Various Fault Conditions of a Triple Redundant 9-Phase PMASynRM

This paper performs electromagnetic (EM) and thermal coupled simulation based on 2D transient electromagnetic and 3D thermal model of a triple redundant 9-phase permanent magnet-assisted synchronous reluctance motor (PMASynRM) under various fault conditions at different speeds. The coupled simulation process is controlled by python scripts. The resultant temperatures under EM-thermal coupled simulation will be comprehensively compared with those under thermal-only simulation. The predicted temperatures by the 3D thermal model will be compared with the test results for validation. The outcomes of the study not only gives a better understanding of the thermal behavior, but also provides a guidance to the necessity of the EM-thermal coupled simulation under different fault conditions as well as to determination of the maximum permissible fault detection time before permanent damage due to the fault may occur.