Abstract: A double-stator and electric machine suitable for achieving sensorless control of the absolute position of a rotor. An inner stator is fixed to a stationary shaft, an outer stator and the inner stator are concentric, and the above components form a stationary part of the electric machine. A rotor is assembled between the outer stator and the inner stator, and forms a rotating part of the electric machine with a moving shaft through a front rotor support. The rotating part is isolated from a front end cap through a front outer bearing. The rotating part is isolated from a back end cap through a back outer bearing after the rotating part is connected with a back rotor support. The moving shaft is isolated from the stationary shaft through an inner bearing.