Title :
Magnetic frequency characteristics of permanent magnet for arc-shaped PM motor
Author :
Watarai, Aki ; FUJISAKI, Keisuke ; Odawara, Shunya ; Fujitani, Kohei
Author_Institution :
Aichi Steel Corp., Tokai, Japan
Abstract :
Magnetic frequency characteristics of permanent magnet for arc-shaped PM motor are shown, because harmonics components of magnetic flux density is supplied to PM, and the loss increase is expected. Stator core shape of PM motor makes slot harmonics components, and PWM inverter to magnetize the stator core makes time harmonics components. Numerical calculation shows that NdFeB sintered magnet has a large loss because of large eddy current in permanent magnet, though NdFeB bonded magnet has much smaller, because of 100 times smaller electrical conductivity.
Keywords :
PWM invertors; eddy currents; electrical conductivity; magnetic flux; neodymium compounds; permanent magnet motors; stators; NdFeB; PWM inverter; arc shaped PM motor; bonded magnet; electrical conductivity; large eddy current; magnetic flux density; magnetic frequency characteristics; permanent magnet; sintered magnet; slot harmonics components; stator core shape; Eddy currents; Harmonic analysis; Magnetic cores; Magnetic flux; Magnetic hysteresis; Permanent magnet motors; Permanent magnets; FFT; High efficiency motor; Magnetic frequency characteristics; PM motor; Permanent magnet; Static magnetic property;
Conference_Titel :
Electrical Machines (ICEM), 2014 International Conference on
Conference_Location :
Berlin
DOI :
10.1109/ICELMACH.2014.6960346
