SLAVE CURRENT CONTROL SYSTEM FOR A PLURALITY OF ELECTRIC MOTORS COUPLED TO A COMMON LOAD

摘要

This disclosure relates to a motor control system for a plurality of direct current motors coupled through gearing or the like to a common load, so that all motors must rotate at the same speed. The torques exerted by all the motors are equalized by utilizing a current feedback signal as a control parameter derived from one master motor for regulating the currents through, and hence the torques exerted by, the other motors (identified as slave motors). The system additionally provides for deenergizing all motors whenever an overcurrent condition occurs, or when there is a shaft of pinion failure in any motor loop.