Title :
Vector Magnetic Characteristic Analysis of a Permanent Magnet Motor by Controlling Local Stress
Author :
Kai, Yuichiro ; Tsuchida, Yuji ; Enokizono, Masato
Author_Institution :
Fac. of Eng., Oita Univ., Oita, Japan
Abstract :
We have reported the measured results for the magnetic properties of a non-oriented electrical steel sheet under various magnetic flux and stress conditions and proposed a new vector magnetic characteristic analysis technique to consider the stress effect on the motor core. In this paper, the stress effect on the magnetic flux density vector, magnetic field strength vector, and magnetic power loss is examined to improve the performance of electric motors. Thus, the assumed stress distribution is applied to the local part of a stator core, and the vector magnetic characteristic analysis is performed using stress-complex E and S modeling. From these results, the loci of the magnetic field strength vector and the magnetic power loss differed by changing the stress distribution. It was possible to decrease the magnetic power loss by applying a controlled local stress distribution.
Keywords :
eddy current losses; iron alloys; magnetic fields; magnetic flux; magnetic leakage; permanent magnet motors; silicon alloys; stators; stress control; electric motors; local stress control; magnetic field strength vector; magnetic flux density vector; magnetic power loss; nonoriented electrical steel sheet; performance improvement; permanent magnet motor core; stator core; stress distribution effect; stress-complex E and S modeling; vector magnetic characteristic analysis; Magnetic cores; Magnetic hysteresis; Magnetic losses; Magnetic properties; Magnetomechanical effects; Stator cores; Stress; Magnetic power loss; non-oriented electrical steel sheet; permanent magnet motor; stress; stress-complex E and S modeling; vector magnetic property;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2014.2362515