Electric Motor: Difference between revisions
From DT Online
m (Corrected category link) |
mNo edit summary |
||
| Line 1: | Line 1: | ||
[[File:DCElectricMotor.jpg|200px|right]] | [[File:DCElectricMotor.jpg|200px|right]] | ||
[http://en.wikipedia.org/wiki/Electric_motor '''Electric motors'''] are devices for changing electrical energy into rotational movement. The turning power or torque of a motor can vary greatly. Generally speaking small motors have low torque whereas large motors usually have a high torque rating. | [http://en.wikipedia.org/wiki/Electric_motor '''Electric motors'''] are devices for changing electrical energy into rotational movement. The turning power or torque of a motor can vary greatly. Generally speaking small motors have low torque whereas large motors usually have a high torque rating. | ||
Motors come in [http://en.wikipedia.org/wiki/Alternating_current '''alternating current ''(ac)'''''] and [http://en.wikipedia.org/wiki/Direct_current '''direct current ''(dc)'''''] versions, dc types of between 3 - 12 volts being most suitable for general use. The current direction controls the direction of rotation for dc motors. | Motors come in [http://en.wikipedia.org/wiki/Alternating_current '''alternating current ''(ac)'''''] and [http://en.wikipedia.org/wiki/Direct_current '''direct current ''(dc)'''''] versions, dc types of between 3 - 12 volts being most suitable for general use. The current direction controls the direction of rotation for dc motors. | ||
It is usually necessary to ''‘gear down’'' a motor as their speed of rotation - typically 2400rpm is too great This can be achieved either mechanically or electronically. | It is usually necessary to ''‘gear down’'' a motor as their speed of rotation - typically 2400rpm is too great This can be achieved either mechanically or electronically. | ||
DC motors have the advantage of being relatively inexpensive and can be obtained in high torque versions which are most suitable for driving models. | DC motors have the advantage of being relatively inexpensive and can be obtained in high torque versions which are most suitable for driving models. | ||
Revision as of 14:57, 1 June 2015
Electric motors are devices for changing electrical energy into rotational movement. The turning power or torque of a motor can vary greatly. Generally speaking small motors have low torque whereas large motors usually have a high torque rating.
Motors come in alternating current (ac) and direct current (dc) versions, dc types of between 3 - 12 volts being most suitable for general use. The current direction controls the direction of rotation for dc motors.
It is usually necessary to ‘gear down’ a motor as their speed of rotation - typically 2400rpm is too great This can be achieved either mechanically or electronically.
DC motors have the advantage of being relatively inexpensive and can be obtained in high torque versions which are most suitable for driving models.