Abstract

[Problem] Provided are a slip ring in which wear due to rotation is reduced as much as possible and an electric motor equipped with the slip ring. [Solution] The slip ring 60a, 60b and electric motor 80a, 80b rotate, at a rotational speed of about a half of that of a rotating body 40, a differential rotation portion 74a, 74b that is a sliding portion. This reduces the virtual rotational speed of the sliding portion, thereby enabling the reduction in the wear of the sliding portion. Further, the slip ring 60a, 60b and the electric motor 80a, 80b position a sliding insulating portion 78 softer than a sliding conducting body 76a, 76b in the gap of the sliding conducting body 76a, 76b. This allows pressing force against the sliding conducting body 76a, 76b to be received on the sliding insulating portion 78 side, thereby enabling the reduction in the pressing force acting on the sliding conducting body 76a, 76b. This makes it possible to further reduce the wear of the sliding conducting body 76a, 76b, a rotating body electrode 62, and a fixed electrode 64.

IPC Classes  ?

• H02K 13/00 - Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windingsDisposition of current collectors in motors or generatorsArrangements for improving commutation
• H01R 39/00 - Rotary current collectors, distributors or interrupters

Abstract

LL is reduced. This makes it possible to suppress loss, and to effectively use the supplied power.

IPC Classes  ?

• H02K 7/10 - Structural association with clutches, brakes, gears, pulleys or mechanical starters
• H02K 17/02 - Asynchronous induction motors
• H02K 21/10 - Rotating armatures