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Effects of leakage flux on magnetic fields of interior permanent magnet synchronous motors

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2 Author(s)
Chang-Chou Hwang ; Dept. of Electr. Eng., Feng Chia Univ., Taichung, Taiwan ; Cho, Y.H.

This paper presents a magnetic circuit model for an interior permanent magnet (IPM) synchronous machine. The model includes each portion of magnetic flux paths, especially the leakage flux paths around the magnets in the rotor. The magnetic field quantities are expressed analytically in terms of the reluctance ratio β and the leakage flux ratios η and λ. It is shown that the width and the iron saturation level of the iron bridge have an important effect on the magnetic field distribution within the motor. Numerical results confirm the validity of the analytical model

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Magnetics, IEEE Transactions on  (Volume:37 ,  Issue: 4 )