Patent ID: 9688249
Date: 2017-06-27
CPC Classifications: B60S,H02K

Claim:
1. An apparatus of detecting a position of a rotating member comprising: a cam plate connected to the rotating member to rotate with the rotating member and including a plurality of segments that are spaced apart from each other, the plurality of segments being disposed in an annular shape; a fixed ring disposed at a radial exterior of the cam plate and spaced apart from the cam plate, the fixed ring maintaining a fixed state; a first contact point contacting an interior portion of any one of the segments and maintaining a fixed state; and a second contact point formed at an external circumferential portion of any one of the segments and contacting the fixed ring, wherein the cam plate further includes a plurality of resistance modules disposed on an inner circumference of the cam plate, the plurality of resistance modules connecting neighboring segments such that current can flow only in one direction, and wherein one of the fixed ring and the first contact point is connected to a power supply and the other of the fixed ring and the first contact point is connected to a ground.