Dynamoelectric machine having an encapsulated coil structure

H - Electricity – 02 – K

Patent

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Details

H02K 15/12 (2006.01) H02K 1/30 (2006.01) H02K 1/32 (2006.01) H02K 3/12 (2006.01) H02K 3/30 (2006.01) H02K 3/34 (2006.01) H02K 3/46 (2006.01) H02K 3/48 (2006.01) H02K 7/04 (2006.01) H02K 9/22 (2006.01) H02K 13/00 (2006.01) H02K 13/04 (2006.01) H02K 15/16 (2006.01) H02K 3/487 (2006.01) H02K 3/50 (2006.01) H02K 9/20 (2006.01)

Patent

CA 2486453

Magnet wires wound in slots in a lamination stack of a dynamoelectric machine are encapsulated, in whole or in par, with plastic. The plastic may be thermally conductive and have features molded therein that enhance heat transfer. The plastic may stiffen the armature and increase its critical speed. Characteristics of the plastic, its geometry and its distribution may be varied to adjust spinning inertia and resonant frequency of the armature. The magnet wires may be compressed into the slots, by application of iso- static pressure or by the pressure of the plastic being molded around them. Larger magnet wire can then be used which increases the power of the electric motor using the armature having the larger magnet wire. A two or three plate mold may be used to mold the plastic around the armature. Balancing features can be molded in place. The plastic can have a base polymer that is a blend of two or more polymers and various thermally conductive fillings.

Les fils des aimants bobinés dans les fentes des empilements laminés d'une machine électrodynamique sont enrobés en totalité ou par paires dans du plastique. Le plastique, qui peut être thermoconducteur ou comporter des éléments intégrés qui favorisent le transfert de chaleur, peut rigidifier l'armature et accroître sa vitesse critique. Les caractéristiques, la géométrie, et la distribution, du plastique peuvent varier pour permettre d'ajuster l'inertie en rotation, et la fréquence de résonance de l'armature. Les fils de l'aimant peuvent être comprimés dans les fentes en appliquant une pression isostatique ou en comprimant le plastique les enrobant. On peut utiliser des fils plus forts pour augmenter la puissance du moteur électrique dont l'armature comporte ces fils. On peut utiliser un moule à deux ou trois plaques pour mouler le plastique autour de l'armature. Des éléments d'équilibrage peuvent être moulés sur place. Le plastique peut comporter un polymère de base mélangé à deux ou plus de deux autres polymères, et à différentes charges thermoconductrices.

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