NDLI: Local demagnetisation analysis of a permanent magnet motor

Content Provider	IET Digital Library
Author	Lee, Ki Doek Kim, Won Ho Jin, Chang Sung Lee, Ju
Abstract	Irreversible demagnetisation of a permanent magnet (PM) at high temperature can be caused by the field distributions because of the stator currents. It can be prevented if the magnet thickness is sufficient. However local irreversible demagnetisation can occur even if the magnet thickness is sufficient. The local irreversible demagnetisation is varied according to the magnetic path. To analyse the cause of local irreversible demagnetisation, the authors introduced an interior PMSM (IPMSM), consisting of a V-shaped magnet and concentrated winding, and performed a parameter analysis of the magnetic field based on the barrier width and magnet position considerably related to the magnetic path using the finite-element method. On the basis of the results, the authors developed a model avoiding local irreversible demagnetisation. A maximum load test was performed after a thermal saturation test to confirm whether irreversible demagnetisation of the manufactured models occurred. Finally, to verify the validity of the finite-element analysis (FEA) results, the torque, efficiency, power factor and induced voltage of the manufactured model, which were obtained by FEA, were compared with the test results.
Starting Page	280
Ending Page	286
Page Count	7
ISSN	17518660
Volume Number	9
e-ISSN	17518679
Issue Number	Issue 3, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-epa/9/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-epa.2014.0244
Journal	IET Electric Power Applications
Publisher Date	2015-03-02
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Concentrated Winding Demagnetisation Field Distribution Because Finite Element Analysis Finite Element Method Induced Voltage Local Demagnetisation Analysis Local Irreversible Demagnetisation Machine Theory Machine Windings Magnet Position Magnetic Field Maximum Load Test Motor Efficiency Motor Torque Parameter Analysis Permanent Magnet Irreversible Demagnetisation Permanent Magnet Motor Permanent Magnet Motors Power Factor Stator Current Synchronous Machine Synchronous Motor Synchronous Motors Thermal Saturation Test Torque V-shaped Magnet
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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