Abstract

An analytical model of slotless PM motor with segmented magnets is presented. The Ampere's approach is adopted for the modeling of permanent magnets and separation variables method is used to calculate magnetic field in all magnetic air-gap of the motor. The model considers parallel magnetized magnet segments by the introduction of volume current densities inside the magnet regions as well as surface currents on their boundaries. A finite element package is used to validate the proposed model.

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