Reversing Motor Circuits 341

Reversing Motor Circuits provides a comprehensive overview of the various means used to reverse electric motors. Motor control circuits use various control devices to change the direction in which a motor rotates. Reversing circuits typically use reversing starters, but they may also use drum switches, limit switches, and programmable logic controllers. To reverse a DC motor, the control device changes the direction of current flow in the motor’s armature. To reverse an AC motor, the control device interchanges two of the motor’s power lines. Many applications require motors to run in reverse, either to change the direction of operation or to brake and stop the motor. After taking this class, users will understand the basic principles behind reversing circuits for motors and be familiar with the various control devices they use. This will prepare users for designing, working with, and selecting control devices for various types of motor reversing circuits.