Patent ID: 6072296
Filing Date: 2000-06-06
Classification: H02K

Abstract:
An asynchronous motor for a drive mechanism comprising:a motor housing having a front end face on an output side and a rear end face;a pair of end shields, one of the end shields arranged on the front end face and the other one of the end shields arranged on the rear end face;a motor shaft supported in the motor housing;a short-circuit winding supported on the motor shaft;at least two sensor units arranged sequentially in a rotational direction of the motor at a rear side distant to the output side, each of the sensor units including an opto-electronic receiver and an opposing electro-optic transmitter;a circular rotary disk, mounted on the motor shaft between the short-circuit winding and the end shield on the rear end face, for interaction with the sensor units, said rotary disk defining an outer circumference and having modulation elements arranged about the outer circumference of the rotary disk for modulating an intensity of optical output signals produced by the electro-optic transmitter when the modulation elements pass by the respective sensor unit, with the receiver transforming the modulated intensity of the optical output signals for formation of at least one electric motor control signal; anda third sensor unit which is offset relative to the at least two sensor units in a longitudinal direction of the motor shaft.