Angle detecting device

摘要

An angle detecting device has a combined structure of plural resolvers, but is simple and is easily produced, and has redundancy reducing the risk of failure. The angle detecting device has two resolvers which are combined in the axial direction and has a stator core 100. The stator core 100 is formed by laminating a first stator core 103 on a second stator core 104. The first stator core 103 is provided with plural salient poles 101 which extend to a center of an axis. The second stator core 104 is provided with plural salient poles 102 which extend to the center of the axis. The salient poles 101 and 102 differ in position when viewed from the axial direction, and the salient poles 102 are positioned between the adjacent salient poles 101 when viewed from the axial direction.

主权项

1. An angle detecting device comprising:
a rotor core that is rotatable; a stator core having an approximately tubular shape and having an inside accommodating the rotor core; and a plurality of salient poles extending from the inside of the stator core to the rotor core, wherein the stator core is formed of a first stator core and a second stator core, the salient poles of the first stator core are equiangularly provided in a circumferential direction and form a first salient pole group, and the salient poles of the second stator core are equiangularly provided in a circumferential direction and form a second salient pole group, the salient poles of the first salient pole group and the salient poles of the second salient pole group are wound with an excitation winding, a sine winding, and a cosine winding, respectively, the sine winding and the cosine winding of the first salient pole group output signals as outputs of a first resolver, and the sine winding and the cosine winding of the second salient pole group output signals as outputs of a second resolver, the salient poles of the first salient pole group and the salient poles of the second salient pole group are arranged at different positions when viewed from an axial direction, the salient pole of the second salient pole group is positioned in a middle of adjacent salient poles of the first salient pole group when viewed from the axial direction, the rotor core is formed of a first rotor core and a second rotor core which is laminated on the first rotor core, each of the first rotor core and the second rotor core is provided with a plurality of magnetic poles which project in a radial direction, and the magnetic poles of the first rotor core and the magnetic poles of the second rotor core differ in position by a same degree as a degree of a difference in position of the first salient pole group and the second salient pole group when viewed from the axial direction.