Tape recorders A common application of a torque motor would be the supply- and take-up reel motors in a
tape drive. In this application, driven from a low voltage, the characteristics of these motors allow a relatively constant light tension to be applied to the tape whether or not the capstan is feeding tape past the tape heads. Driven from a higher voltage (and so delivering a higher torque), the torque motors can also achieve fast-forward and rewind operation without requiring any additional mechanics such as gears or clutches.
Computer games In the computer gaming world, torque motors are used in force feedback steering wheels.
Throttle control Another common application is the control of the
throttle of an
internal combustion engine in conjunction with an
electronic governor. In this usage, the motor works against a return spring to move the throttle in accordance with the output of the governor. The latter monitors engine speed by counting electrical pulses from the ignition system or from a magnetic pickup and, depending on the speed, makes small adjustments to the amount of current applied to the motor. If the engine starts to slow down relative to the desired speed, the current will be increased, the motor will develop more torque, pulling against the return spring and opening the throttle. Should the engine run too fast, the governor will reduce the current being applied to the motor, causing the return spring to pull back and close the throttle.
Actuators Torque motors can be used as
actuators for
direct-drive mechanisms in some situations where otherwise geared electric motors would be used; for example, in
motion control systems or
servomechanisms. Actuators are hardware devices that converts the controller command signal into a change in a physical parameters. ==References==