DIRECT DRIVE MOTOR, TRANSPORT DEVICE, INSPECTION DEVICE, AND MACHINE TOOL

摘要

Provided are: a direct drive motor with which an improvement in the detection accuracy of a rotational state is achieved; a transport device using said direct drive motor; an inspection device; and a machine tool. The present invention is provided with: a motor unit 9 having a stator 13 and a rotor 15 capable of rotation relative to the stator 13; an inner housing 3 to which the stator 13 is fixed; a rotor flange 5 to which the rotor 15 is fixed; a bearing 11 that rotatably supports the rotor flange 5 in relation to the inner housing 3; an annular inner ring retainer 29 formed from a non-magnetic material that sandwiches the inner housing 3 and a fixed ring 21 of the bearing 11 in an axial direction; and a resolver 27 for detecting the rotational state of the motor unit 9. Therein, the resolver 27 includes a resolver rotor 33 and a resolver stator 35 that is disposed facing the resolver rotor 33, said resolver rotor being fixed directly to the rotor flange 5, and said resolver stator 35 being fixed directly to the inner ring retainer 29.