Flux-switching dual excitation electrical machine
AssigneeGemplus
InventorsEmmanuel Kiên Lôc Hoang, Michel Roger René Lecrivain, Mohamed Gabsi
Life of this patent
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Abstract
Flux-switching electrical machines. In particular, a flux-switching electrical machine having a stator and a rotor. The stator has permanent magnets, armature windings and excitation windings, and the rotor has no winding or permanent magnet but includes a plurality of flux-switching teeth. The stator is generally formed by a succession of elementary cells, each cell being intended to interact with only a single tooth of the rotor at a time. Each cell includes one of the permanent magnets; a first slot for at least partly housing one of the excitation windings at least; and second slots for housing one of the armature windings.
Claims11
Flux switching electrical machine comprising a stator (400) and a rotor (300), the stator comprising permanent magnets (600a, 600b), armature windings (900a, 900b) and excitation windings (501, 502), and the rotor not having any windings or permanent magnets, and comprising a plurality of flux switching teeth (301a, 301b), characterised in that the stator is formed in particular by a sequence of elementary cells (400a, 400b), each (400a) designed to interact with a single tooth of the rotor at a time, and each comprising:
- one of the permanent magnets (600a),
- a first slot (500a) to house at least part of at least one (501a) of the excitation windings (501) and;
- second slots (802a, 803a) to house one (900a) of the armature windings.
Machine according to one of the previous claims, characterised in that in each cell, the excitation windings and the permanent magnet are arranged in the same first slot (500a).
Machine according to one of the previous claims, characterised in that in each cell (400a), the second slots (802a, 803a) are at an approximately equal radial distance from a rotation axis of the rotor (300).
Machine according to one of the previous claims, characterised in that the second slots (802a, 803a) extend on each side of the permanent magnet (600a).
Machine according to one of the previous claims, characterised in that each elementary cell also comprises a first material forming a portion of the magnetic circuit (700a) located at the periphery of the stator and designed to at least partially enclose a flux (B1) generated by the excitation windings and/or the permanent magnets.
Machine according to one of the previous claims, characterised in that each cell (400a) also comprises at least one second ferromagnetic material (800a, 801a) separating the permanent magnet (600a) from the winding of the armature (900a).
Machine according to one of the previous claims, characterised in that in each cell (400a), the permanent magnet (600a) and the first slot (500a) generally form a T, as can be seen from the rotation axis of the rotor (300).
Machine according to one of the previous claims, characterised in that excitation windings are subdivided in the first slots of two adjacent elementary cells.
Dependencies are inferred from the claim text.