Application Analysis of New Type of Soft Magnet in High Speed and Low Loss Permanent Magnet Motor

Abstract

AbstractThis paper first summarizes the development status of new soft magnetic materials, and then analyzes the principle of motor core loss. Then, selects new soft magnetic materials ST100 and traditional silicon steel 20WTG1500 for testing, were selected for testing to compare and analyze the material properties after annealing. The performance of ultra-thin silicon steel with a thickness of 0.1 mm is basically the same as that of traditional silicon steel at low frequency, but when the frequency is greater than 400 Hz, the loss is significantly reduced, and the advantages are obvious. Finally, based on the measured two kinds of materials and finite element simulation, two permanent magnet synchronous motor models with the same structure and different core materials are established based on an 8-pole built-in “V” rotor permanent magnet synchronous motor with rated power of 50 kW, working frequency of 1 kHz and rated speed of 15000 r/min, and the core loss is analyzed emphatically. Compared with traditional silicon steel motors, the core loss of ultra-thin silicon steel motors is reduced by an average of 48.35%. Compared with traditional silicon steel motors, ultra-thin silicon steel motors have obvious advantages in high-frequency and high-speed applications.KeywordsNew Type of Soft MagneticUltra-thin Silicon SteelHigh-speedlow-loss permanent magnet motor