Demagnetization Analysis of Permanent Magnet Synchronous Machines under Short Circuit Fault

Author

Zhao, Guoxin ; Tian, Lijian ; Shen, Qiping ; Tang, Renyuan

Author_Institution

Res. Inst. of Special Electr. Machine, Shenyang Univ. of Technol., Shenyang, China

fYear

2010

fDate

28-31 March 2010

Firstpage

1

Lastpage

4

Abstract

Sudden symmetrical short circuit is a serious fault when the entire demagnetization or partial demagnetization of permanent magnet can occur. The aim of this paper is to analyze the demagnetization phenomenon of permanent magnet synchronous machines (PMSM) based on FEM and analytic method. Firstly, the transient FEM is utilized to analyze the demagnetization operating point of permanent magnet when symmetrical short circuit occurs. The computed time evolution of the maximum partial demagnetization operating point is derived. Secondly, the synthesized magnetomotive force (MMF) of the short circuit current is analyzed by analytical method. Through the analysis some characters are obtained. At last several factors that affect the demagnetization operating point are summarized and several measures are put forward to improve the max demagnetization operating point of permanent magnet.

Keywords

demagnetisation; fault currents; finite element analysis; permanent magnet machines; synchronous machines; FEM; PMSM demagnetization analysis; finite element method; magnetomotive force; permanent magnet synchronous machines; short circuit current; short circuit fault; Circuit analysis; Circuit faults; Circuit synthesis; Demagnetization; Magnetic analysis; Magnetic circuits; Permanent magnet machines; Permanent magnets; Short circuit currents; Transient analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific

Conference_Location

Chengdu

Print_ISBN

978-1-4244-4812-8

Electronic_ISBN

978-1-4244-4813-5

Type

conf

DOI

10.1109/APPEEC.2010.5448459

Filename

5448459