Resolver integrated type motor

摘要

A resolver-integrated motor has a radial irregular shape which is formed at an end on a non-load side of its motor shaft. This radial irregular shape is used as a resolver rotor. The radial irregular shape is formed by grinding or turning the motor shaft made of a carbon steel material in the same holding state as portions in which a bearing on a load side and a bearing on the non-load side are inserted. Accuracy of rotation center position of the resolver rotor to the motor shaft can be greatly improved, and detection accuracy does not require precise assembly of the resolver stator yoke to the motor bracket. The resolver stator yoke can be directly fixed to the motor bracket an intermediate part. A compact and inexpensive motor having a resolver is provided without sacrificing the accuracy of position detection.