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US 5,744,892 AGranted
Brush and slip ring arrangement of an AC generator
AssigneeNippondenso Co., Ltd.
InventorsTakuzou Mukai, Kenzo Mitani
Life of this patent
Estimating the term…
Abstract
A slip ring unit which comprises self-lubricated carbonaceous rings and a wear resistive brush made of laminated-elastic-copper-alloy-sheets are used to supply a field current to a field coil which is carried by a rotor of an alternator. Therefore, the space for accommodating the brush and slip ring unit of the alternator is made compact and the alternator size can be made small.
Claims9
A brush and slip ring arrangement of an AC generator which includes a housing, a stator having a stator coil, a rotor having a field coil and a shaft and a voltage regulator, wherein
- said arrangement comprises:
- a slip ring unit carried by said shaft and having a cylindrical insulating member and a pair of carbonaceous slip rings around said cylindrical insulating member;
- a pair of brush members made of springy copper alloy, each of said brush members having a semicircular brush body disposed to at least partially surround one of said slip rings, two contact portions disposed at opposite ends of said brush body in contact with one of said slip rings and a clamp portion;
- and
- a brush holder fixed to said housing, said brush holder having a pair of connecting terminals each of which engages said clamp portion of one of said brush members and an insulating member insulating said connecting terminals from each other;
- whereby portions of said slip rings in contact with said contact portions of said brush member always change so that said slip rings are cooled sufficiently.
3 more elements
Dependencies are inferred from the claim text.