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AssigneeValeo Equipement Electriques Moteur
InventorAntoine Dokou Akemakou
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The invention relates to an electric rotary machine having a stator with several slots for receiving field coils and a rotor having excitation means with main permanent magnets housed in a rotor structure to define a plurality of successive North and South poles (N. S.). The invention is characterized in that the rotor structure has a plurality of barrier zones substantially impermeable to the magnetic current which are arranged with respect to the main magnets such that a substantial part of a magnetic current input in a main magnet is derived at least from one South pole and adjacent to the magnet and a substantial part of a magnetic current output by one magnet is directed toward at least one North pole adjacent to the magnet. Thus, the invention provides a lighter, less costly and more efficient rotor. The invention is applicable to starters or AC-starters for motor vehicles.
A rotary electric machine comprising a stator possessing a plurality of slots receiving stator windings, and a rotor including excitation means constituted by main permanent magnets received in a rotor structure to define a plurality of successive north and south poles (N, S), the number of main permanent magnets provided being half the number of poles, wherein the rotor structure includes a plurality of barrier zones that are substantially impermeable to magnetic flux and that are disposed relative to the main magnets in such a manner that a substantial portion of the magnetic flux entering into a main magnet comes from at least one south pole adjacent to the magnet and a substantial portion of the magnetic flux leaving a magnet goes towards at least one north pole adjacent to the magnet.
Dependencies are inferred from the claim text.