Torque and heat characteristics of IPMM with various arrangements of permanent magnets and magnetic bridges

This paper analyzes the interior permanent magnet motor's (IPMM's) performance with various magnets and magnetic flux bridge configurations. The goal is to obtain the best motor performance from all observed configurations. The outset configuration of the magnet was flat and then varied with a tangential and V arrangement. Some parameters were unchanged, covering the dimensions of the stator, rotor, permanent magnet, and winding configuration. The simulation was done by analytical calculations and numerical simulation to obtain the losses, torque-speed characteristics, and heat distribution. The results show that all configurations produced the same maximum rotation to achieve zero torque. Besides, the T-1 type achieved the highest torque, slightly higher than the flat type, with a difference of 0.29%. The T-2 and V-1 types brought about the highest and lowest temperatures, respectively, with the flat type falling somewhere in the middle (65.35°C). Concluding the results above, the flat type yields the best performance with high output torque and modest temperature rise.