Ring Losses Evaluation in Ringed-Pole PM Motors
| Autor: | Silverio Bolognani, Emanuele Fornasiero, Nicola Bianchi, Adriano Faggion, Damiano Mingardi |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Physics
MMF harmonics Rotor losses Ring losses Ringed pole motor Electrical and Electronic Engineering Control and Systems Engineering Industrial and Manufacturing Engineering Mathematics::Commutative Algebra business.industry Stator Rotor (electric) Electrical engineering Mechanics Ring (chemistry) law.invention Harmonic analysis Magnetomotive force Electromagnetic coil law Harmonics business Anisotropy |
| Popis: | In this paper, the ringed-pole surface-mounted permanent-magnet machine is investigated from the point of view of the ring losses. The rings around the poles create a high-frequency anisotropy that is useful to detect the rotor position by means of a high-frequency signal injection. However, the presence of the rings causes additional rotor losses. The causes of ring losses are investigated in the paper. The first cause is the high-frequency signal injection itself. The harmonics in the airgap magnetomotive force, which are not synchronous with the rotor and hence induce currents in the rings, are the second source of losses. The third source is the airgap flux fluctuation due to stator slotting. Machines of different sizes and winding types are investigated. A finite-element analysis and an analytical model are used to estimate the ring losses, comparing the results. The influence of the ring cross-sectional area on the ring losses is analyzed, showing that the ring losses can be reduced in certain configurations. |
| Databáze: | OpenAIRE |
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