engleski

Analytical Investigation of Slotted Air-gap Surface Mounted PMSM with Magnet Bars Magnetized in Shifting Direction

An analytical model is presented, which uses two-dimensional field theory in polar coordinates to determine the flux density distribution, cogging torque, back EMF and electromagnetic torque in the slotted air gap of permanent magnet motors with surface mounted magnet bars which are magnetized in shifting direction. The effect of stator slots is introduced by modulating the magnetic field distribution in the slotless stator by the complex relative air gap permeance. The accuracy of the developed model is verified by comparing its results with those obtained from experimental measurement and previously validated numerical finite element code.

Magnetic field; conformal mapping; air-gap permeance; permanent magnet synchronous motor; finite element

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