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This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Torque motor" – news · newspapers · books · scholar · JSTOR (August 2025) (Learn how and when to remove this message) You can help expand this article with text translated from the corresponding article in German. (August 2025) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 1,778 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:Torquemotor]]; see its history for attribution. You may also add the template {{Translated|de|Torquemotor}} to the talk page. For more guidance, see Wikipedia:Translation. You can help expand this article with text translated from the corresponding article in Ukrainian. (August 2025) Click [show] for important translation instructions. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 315 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Ukrainian Wikipedia article at [[:uk:Моментний двигун]]; see its history for attribution. You may also add the template {{Translated|uk|Моментний двигун}} to the talk page. For more guidance, see Wikipedia:Translation. (Learn how and when to remove this message)

A torque motor is a specialized form of DC electric motor which can operate indefinitely while stalled, without incurring damage. In this mode of operation, the motor will apply a steady torque to the load (hence the name). A torque motor that cannot perform a complete rotation is known as a limited angle torque motor. Brushless torque motors are available; elimination of commutators and brushes allows higher speed operation. ^{[citation needed]}

Torque motors normally use toroidal construction, allowing them to have wider diameter, more torque, and better dissipation of heat. They differ from other motors in their higher torque, thermal performance, and ability to operate while drawing high current in a stalled state.

An analogous device, moving linearly rather than rotating, is described as a 'force motor'. These are widely used for refrigeration compressors and ultra-quiet air compressors, where the force motor produces simple harmonic motion in conjunction with a restoring spring.

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.

In the computer gaming world, torque motors are used in force feedback steering wheels.

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.

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.

• https://www.machinedesign.com/motors-drives/article/21832523/torque-motors-do-the-trick overview article in trade journal
• https://www.kollmorgen.com/sites/default/files/public_downloads/Kollmorgen%20Inland%20Motor%20Direct%20Drive%20DC%20Motors%20Catalog%20EN.pdf

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