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

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

1274

Lastpage

1278

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2014 International Conference on

Conference_Location

Berlin

Type

conf

DOI

10.1109/ICELMACH.2014.6960346

Filename

6960346