Investigation of the effect of different power degree NdFeB magnets used in interior permanent magnet brushless direct current motor (IPMBLDC) on motor performance

Abstract

Purpose: In this study, it is aimed to determine the effects of magnets used in BLDC motors on the motor performance of NdFeB type magnets with different power densities at different temperatures. Theory and Methods: The magnetic properties of the magnet together with the physical and mechanical properties are also decisive in the choice of magnet. The effects of AlNiCo, SmCo and NdFeB magnets used in BLDC motors and different power rating types of NdFeB magnets on motor performance parameters were analyzed and compared with FEM. In addition, the effects of NdFeB magnet types on heat transfer were analyzed with Ansys-Motorcad. Results: In the comparison of different magnet types, it was determined that the motor performance effects of the NdFeB type were better. In the NdFeB type magnet, it was determined that the N52 type magnet provided the best performance parameters compared to the other types. Conclusion: It has been determined that NdFeB types can be determined in terms of temperature, efficiency, torque and speed performance and better effects can be created in the design according to the best NdFeB magnet type and power rating used in IPBLDC motor design, which is used in different areas such as electric vehicles. In addition, it has been investigated that NdFeB magnet types have better results in the effect of heat transfer, as well as N52s with higher power degrees.