Shafts Influence on Permanent Magnet Magnetization for V-Type Interior Permanent Magnet Synchronous Machines

Post-assembly magnetization (PAM) has been widely adopted when manufacturing permanent magnet (PM) electrical machines to simplify the assembly process. However, for V-type interior PM synchronous machines (IPMSMs), magnetizing the bottom of V-type PMs is challenging. This paper investigates the shaft influence of PAM by comparing the results with three different shafts. Eddy currents within the shafts are considered and found impactful for magnetization. Simulation results show that the PAM requires less energy consumption with the machine shaft than without any shaft, and the PAM with the dummy shaft is even better as the eddy currents are suppressed. Finally, experimental validation is conducted with a magnetization fixture of various capacitances.