Prediction of eddy current losses of surface mounted permanent magnet servo motor

Author

Deeb, R. ; Janda, M. ; Makki, Z.

Author_Institution

Dept. of Power Electr. & Electron. Eng., Brno Univ. of Technol., Brno, Czech Republic

fYear

2012

fDate

2-5 Sept. 2012

Firstpage

1797

Lastpage

1802

Abstract

Eddy current losses are generated in a magnetic material when it is excited by an AC magnetic field. These losses increase the temperature of the magnets, which causes demagnetization, then deterioration of these magnets. This paper deals with calculation of eddy current losses of a servo motor with permanent magnets. Eddy current losses are calculated using two methods for both two and three dimensional models of the PM servo motor. These losses have been calculated according to the permanent magnets properties and to the magnetic flux density distribution in the air gap between the stator and the rotor of the analyzed servo motor. Finally, a comparison of the different results is performed.

Keywords

AC motors; demagnetisation; eddy current losses; magnetic flux; magnetic leakage; permanent magnet motors; servomotors; surface mount technology; AC magnetic field; PM servo motor; air gap; demagnetization; eddy current loss prediction; magnet deterioration; magnet temperature; magnetic flux density distribution; magnetic material generation; rotor; stator; surface mounted permanent magnet servo motor; Eddy currents; Magnetic flux density; Permanent magnet motors; Permanent magnets; Servomotors; Synchronous motors; Eddy currents; Finite element methods; Magnetic losses; Permanent magnet motors; Servomotors;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2012 XXth International Conference on

Conference_Location

Marseille

Print_ISBN

978-1-4673-0143-5

Electronic_ISBN

978-1-4673-0141-1

Type

conf

DOI

10.1109/ICElMach.2012.6350125

Filename

6350125