Title :
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
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;
Journal_Title :
Industry Applications, IEEE Transactions on
DOI :
10.1109/TIA.2014.2311494
