Transient Analysis of Irreversible Demagnetization of Permanent-Magnet Brushless DC Motor With Interturn Fault Under the Operating State

Author

Kyung-Tae Kim ; Yoon-Seok Lee ; Jin Hur

Author_Institution

Sch. of Electr. Eng., Univ. of Ulsan, Ulsan, South Korea

Volume

50

Issue

5

fYear

2014

fDate

Sept.-Oct. 2014

Firstpage

3357

Lastpage

3364

Abstract

We investigated the irreversible demagnetization of a permanent-magnet (PM) brushless dc motor under an interturn fault condition. For the transient analysis, we developed a finite-element method-based demagnetization algorithm in the operating state, taking into account the circulating current flowing in the shorted turns and the freewheeling current flowing in the diode. We analyzed the magnetic distribution property, input current, circulating current, and demagnetization characteristic of the PM using this algorithm. The analysis results from the demagnetization algorithm were verified by dynamic fault experiments.

Keywords

brushless DC motors; demagnetisation; finite element analysis; permanent magnet motors; transient analysis; dynamic fault experiments; finite element method; interturn fault condition; irreversible demagnetization; operating state; permanent magnet brushless DC motor; transient analysis; Algorithm design and analysis; Brushless DC motors; Circuit faults; Demagnetization; Equations; Mathematical model; Temperature measurement; Brushless dc (BLDC) motor; demagnetization; fault analysis; finite-element method (FEM); interior permanent-magnet (IPM) motor; interturn fault; irreversible demagnetization; magnet fault;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/TIA.2014.2311494

Filename

6766741