H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 15/00 (2006.01) H01R 39/04 (2006.01) H01R 39/06 (2006.01) H01R 39/16 (2006.01) H01R 43/06 (2006.01) H02K 15/12 (2006.01)
Patent
CA 2330103
A barrel or face-type carbon-segment commutator assembly (12c) for an electric motor includes a segmented commutating surface (22c) defined by an annular array of commutator sector (14c, 18c), each sector including a carbon segment (18c) connected to a respective conductor section (14c). To form the assembly, an annular carbon cylinder (20c) is overmolded onto a copper blank (70c) and radial grooves (54c) are formed in an inside surface of the carbon cylinder opposite the communicating surface. An insulator hub (24c) is overmolded onto the carbon cylinder and into the radial grooves. Slots (56c) are then machined inward from the communicating surface to the insulator-filled grooves to isolate the commutator sectors. The remaining insulator material mechanically interlocks the sectors. In other embodiments, the commutator assembly (100) is formed by soldering a carbon cylinder (142) to conductor sections (102) before overmolding a hub (112) and cutting slots (108) to isolate commutator sectors (106).
L'invention se rapporte à un ensemble collecteur (100) à lames de carbone, de type barillet, destiné à un moteur électrique. Ledit ensemble collecteur comprend un ensemble annulaire de sections conductrices en cuivre (102) estampées à partir d'un unique flan de cuivre. On surmoule l'ensemble annulaire dans une composition de carbone (106) liée à la résine, électriquement conductrice qui verrouille mécaniquement les sections conductrices et définit une surface de commutation cylindrique externe (110). Puis on forme un moyeu annulaire (112) en coulant une matière isolante à l'intérieur, sous et au-dessus du surmoulage de carbone et de l'ensemble des sections conductrices. La matière isolante du moyeu s'écoule dans les rainures radiales (108) du surmoulage de carbone et de ce fait, seule la surface de commutation cylindrique externe reste exposée.
Bauer William A.
Ziegler William E.
Macrae & Co.
Mccord Winn Textron Inc.
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