Electrical machine and method for the manufacturing of...

H - Electricity – 02 – K

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H02K 21/24 (2006.01) H02K 3/47 (2006.01)

Patent

CA 2742362

Electrical machine with a rotor (13) with magnets (17) carried by an annular carrier (14, 15), at which a magnet field is created over an air gap between two rotor parts, at which an ironless stator (12) with windings (19) is arranged, A space saving machine is achieved with a stator which is assembled of sections (12) with channels (23, 24) for circulation of coolant, and which has windings with an annular, compact central part (27) providing the active part of the stator. A method for manufacturing of stator sections for such electrical machines is described, wherein a winding (19) is embedded in an electrically insulating casting material for providing a rigid element. A coil (19) is arranged in one part of a bisected shell housing (28, 29) or a bisected casting mould, and the shell housing or mould is closed, casting material is introduced through an opening and the inner part of the housing or mould is subject to underpressure and possibly vibration.

La présente invention concerne une machine électrique comprenant un rotor (13) pourvu d'aimants (17) supportés par un support annulaire (14, 15), au niveau duquel est créé un champ magnétique au-dessus d'un entrefer entre deux parties de rotor, au niveau duquel un stator ne contenant pas de fer (12) comportant des enroulements (19) est disposé. Une machine peu encombrante est produite avec un stator qui est assemblé à partir de sections (12) pourvues de rainures (23, 24) pour la circulation d'un fluide frigorigène et comporte des enroulements présentant une partie centrale annulaire compacte (27) constituant la partie active du stator. Un procédé de production des parties statoriques de telles machines électriques est décrit, ce procédé comprenant un enroulement (19) intégré dans un matériau de moulage isolant électrique pour produire un élément rigide. Une bobine (19) est placée sur une partie d'une enveloppe protectrice scindée (28, 29) ou d'un moule de moulage scindé et l'enveloppe protectrice ou bien le moule est fermé, le matériau de moulage est introduit par une ouverture et la partie intérieure de l'enveloppe ou du moule est soumise à une pression négative et éventuellement à des vibrations.

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