Rotors utilizing a stepped skew

Details Rotors utilizing a stepped skew Rotors utilizing a stepped skew

H - Electricity

02

K

H02K 21/14 (2006.01) H02K 1/16 (2006.01) H02K 1/26 (2006.01) H02K 15/02 (2006.01) H02K 17/16 (2006.01) H02K 17/26 (2006.01) H02K 19/14 (2006.01) H02K 21/46 (2006.01)

Patent

CA 2334319

Divided magnet rotors R having a stepped skew rather than a helical skew are described. The stepped skew enables the use of straight magnet sections (44) that can be inserted into the rotor core notches (38) thereby eliminating the need to produce a helix from the rotor cage. The stepped skew is effective in decoupling stator slot order harmonics. In addition, the stepped skew rotor R includes, in some embodiments, open slots (22) so that the rotor is not subject to rotor bridge saturation.

Cette invention concerne des rotors (R) à aimants divisés qui font appel à un écart angulaire étagé plutôt qu'à un écart angulaire hélicoïdal. L'écart angulaire étagé permet d'utiliser des sections d'aimant droites (44) que l'on insère dans les encoches (38) du noyau du rotor, ce qui permet d'éliminer tout besoin de formation d'une spirale à partir de la cage du rotor. L'écart angulaire étagé permet de découpler efficacement les harmoniques liées aux encoches du stator. Ce rotor (R) à écart angulaire étagé comprend en outre, dans certains modes de réalisation, des encoches ouvertes (22) qui permettent d'éviter que le rotor ne soit soumis à une saturation de son pont.

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