Features of Torque Motors

Torque motors are motors with a large starting torque and sloping characteristics that provide stable operation throughout the range of speed - torque characteristics, especially low speeds and in restraint. With this feature, they are usable in wide-ranging applications as winding and tensioning motors.

Features

Torque Can be Adjusted by Simply Changing the Applied Voltage to the Motor

Torque motors have a large starting torque and have a characteristic of high torque at low speed and low torque at high speed (sloping characteristics).
The motor torque varies in proportion to the square of the applied voltage.
Therefore, when the load or applied voltage changes, the rotation speed also changes.

Do Not Let the Load Sag. For Simple Winding Control

In an application where an object is released continuously at a constant speed and wound up with constant tension, the torque must be doubled and the speed must be halved if the diameter of the winding spool is doubled. Torque motors have sloping characteristics similar to that relationship. Therefore, they are widely used in winding applications.

Maintains Proper Tension With Fine Adjustments. As Unwinding Brake

Maintenance-Free, Ideal as an Unwinding Brake

Torque motors can generate a braking force when rotated in the opposite direction to the motor rotation direction by an external force, etc. By using a torque motor on the unwinding side of the load, winding can be achieved while maintaining the appropriate tension.
Also, since they do not wear out, there is no need for brake maintenance.

Can be Used in the Full Range of Rotation Speed - Torque Characteristics and Can Also be Used for Locked Rotor Operation

Unlike induction motors or reversible motors, torque motors are designed to provide a stable torque even under locked rotor conditions or at very low speed (nearly locked rotor condition).
They are suitable for the drive of pushing applications that require static torque, or for loads that are under locked rotor conditions at the end of processes.

Note

When using a motor in a locked rotor operation, the output torque becomes very large. The output torque of the gearhead must be lower than the maximum permissible torque. Also, ensure that the load never hits an object and stops. The gearhead may be damaged by an impact if hit to stop.

Applications

Here are some examples of typical applications that take advantage of the features of torque motors.

Winding

The sloping characteristics of torque motors suit applications for winding at constant speed and tension.

Tension Adjustment (Brake)

The brake force of the torque motor can be used for tensioning to prevent the material from sagging during winding.

Pushing

Since stable torque can be obtained even under locked rotor condition or in semi-locked low speed operation, it is suitable for push-motion operation.^*

Tightening

It is suitable for tightening screws, etc., since stable torque can be obtained even under locked rotor condition or in semi-locked low speed operation.^*

• *The output torque increases in the locked rotor condition. Never hit to stop when using a gearhead or a linear head.
  The gearhead or linear head may be damaged by an impact if hit to stop.