Rotor for rotating electrical machine

Details Rotor for rotating electrical machine Rotor for rotating electrical machine

H - Electricity

02

K

H02K 1/27 (2006.01) H02K 1/22 (2006.01)

Patent

CA 2681713

A motor rotor body (31) includes: a first and a second flange member (32, 33) formed from a conductive material; a plurality of coupling members (34) made from a conductive weak magnetic material and arranged at a predetermined interval in the circumferential direction; and induction magnetic poles (39L, 39R) formed from soft magnetic material and arranged between the adjacent coupling members (34) in the circumferential direction. The outer circumferential portions of the first and the second flange members (32, 33) are connected to the both end portions of the coupling members (34) by bolts (37) so as to support the induction magnetic poles (39L, 39R). Since the connection portions between the first and the second flange members (32, 33) and the coupling members (34) are electrically insulated by an insulation coating, it is possible to reduce eddy current flowing in a closed circuit formed by the first flange member (32), the coupling member (34), the second flange member (33), and the coupling member (34) during operation. This minimizes heat generation and energy loss accompanying the eddy current.

L'invention concerne un corps de rotor de moteur (31) comprend : un premier et un second éléments de bride (32, 33) formés à partir d'un matériau conducteur ; une pluralité d'éléments de couplage (34) faits à partir d'un matériau faiblement magnétique conducteur et disposés à un intervalle prédéterminé dans la direction périphérique ; et des pôles magnétiques à induction (39L, 39R) formés à partir d'un matériau magnétique doux et disposés entre les éléments de couplage adjacents (34) dans la direction périphérique. Les parties périphériques externes des premier et second éléments de bride (32, 33) sont connectées aux deux parties d'extrémité des éléments de couplage (34) par des boulons (37) de façon à supporter les pôles magnétiques à induction (39L, 39R). Étant donné que les parties de connexion entre les premier et second éléments de bride (32, 33) et les éléments de couplage (34) sont électriquement isolées par un revêtement d'isolation, il est possible de réduire un courant de Foucault circulant dans un circuit fermé formé par le premier élément de bride (32), l'élément de couplage (34), le second élément de bride (33) et l'élément de couplage (34) pendant le fonctionnement. Ceci minimise la génération de chaleur et la perte d'énergie accompagnant le courant de Foucault.

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