ELECTRIC DRIVER FOR PRODUCING OF TORQUE ABD ITS CONTROL SYSTEM Russian patent published in 2008 - IPC H02K7/10 H02K37/24 H02P8/00 

FIELD: electrical engineering, applicable for imparting of a precision turn, rotary and oscillatory motions to various mechanisms within a wide range of angles and angular velocities.

SUBSTANCE: the electric drive has a step motor, whose shaft is coupled to the electric drive output shaft through a reduction gear. An additional motor is kinematically linked with the output shaft of the electric drive by a belt transmission, and the torque developed by it on the output shaft exceeds the friction torque on the output shaft, but it doesn't exceed the torque on the output shaft from the step motor. The electric drive control system has a DC voltage source, step motor with a stop motor control unit, additional motor with a selector switch of the direction of its rotation. The step motor control unit is provided with control outputs, and its input is connected to the DC voltage source. The additional motor is connected to an additional supply source via the selector switch of the direction of its rotation, and its control inputs are connected to the control outputs of the step motor.

EFFECT: expanded dynamic range of rotary speeds of the output shaft, enhanced reliability, precision of the rotary speed and provided a turn of the output shaft through the preset angle.

2 cl, 4 dwg