Design and magnetic noise reduction of the Surface Permanent Magnet Synchronous Machine using complex airgap permeance

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Fakam, Mathias | Hecquet, Michel | Lanfranchi, Vincent | Randria, Andry

Edité par HAL CCSD ; Institute of Electrical and Electronics Engineers

International audience. Nowadays, the development of the electric motorization for land vehicles is essential since the energetic challenge has become very critical. This paper presents the development of a tool used for the optimal acoustic and electromechanical modeling which stands out from standard analytical and Finite Element modeling respectively, due to the high accuracy of calculations and the quickness of the resolution. Thanks to a coupling between an analytical model and statics FE simulations, a complex global air-gap permeance per area unit is calculated by our 'hybrid' model, in order to take into account the permeability of magnetic wedges, the height of pre-slots, and the rotor shape. An unequalled level of precision and speed of resolution is obtained for the computation of air-gap magnetic pressures. Some results of comparison between acoustic measurement and simulation on a concentrated winding motor, for different speeds, will be presented.

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