ELECTRIC DRIVE FOR PRODUCING OF TORQUE (ITS MODIFICATIONS) AND ITS CONTROL SYSTEM (ITS MODIFICATIONS) Russian patent published in 2008 - IPC H02K7/10 H02K37/24 H02P8/00 

FIELD: electrical engineering, applicable for imparting of a precision turn and rotary motion 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 output shaft through a reduction gear. An additional motor is kinematically linked with the output shaft by a belt transmission, whose belt envelopes the drive and driven pulleys located respectively on the shaft of the additional motor and an the output shaft. The torque developed by the additional motor 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 step motor control unit, additional motor with a selector switch of the direction of its rotation. A DC motor is used as the additional motor, it is connected via the selector switch of the direction of its rotation to the additional DC voltage source with a drooping volt-ampere characteristic. The second modification of the electric drive and of the system of its control provides for installation of the driven pulley on the output shaft of the step motor.

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

4 cl, 4 dwg