Patent ID: 8674687
Filing Date: 2014-03-18
Classification: G01D,Y10T

Abstract:
1. An angle detection device comprising: a stator which includes a plurality of salient pole portions which are formed on an inner peripheral side of an annular flat sheet made of a magnetic material and are raised by bending, each salient pole portion constituting a winding magnetic core on which a winding member for excitation and a winding member for detection are mounted; and a rotor which is made of a magnetic material and is provided rotatably relative to the stator such that gap permeance between the rotor and an outer-peripheral-side surface of said each salient pole portion is changed due to the rotation of the rotor about a rotational axis of the rotor, wherein a smallest inner diameter of the annular flat sheet after the bending is an inner diameter of the annular flat sheet at the respective salient pole portions such that undesired projections are not formed on an inner side of the annular flat sheet.