The global push towards electrification, particularly in the automotive and aerospace sectors, necessitates the development of electric motors with higher efficiency and power density. A primary limiting factor in high-speed permanent magnet synchronous motors (PMSMs) is the core loss in the stator. This study presents an experimental performance comparison of an interior permanent magnet synchronous motor (IPMSM) using stator cores made from an advanced amorphous alloy and a conventional silicon steel core. To conduct this evaluation, two motors of identical design were constructed: one with an amorphous alloy core (AMO), and one with a non-oriented silicon steel core (NGO). The motors were tested under various load conditions at 12,600 rpm using maximum torque per ampere (MTPA) control. The results demonstrate that the IPMSM with the AMO stator core achieved a significant reduction in iron loss of up to 72% compared to the one with the NGO stator core, while maintaining nearly identical torque density. This substantial loss reduction led to an overall efficiency improvement of approximately 3.1%. These findings confirm that amorphous alloys are a highly effective core material for improving the efficiency of high-speed IPMSMs by drastically reducing the iron loss.
Çirozlar et al. (Sat,) studied this question.