Friday, July 20, 2012
DC Motor Speed Control The speed of a direct current motor can in most cases be controlled using a very simple method - by changing the voltage at the output of the adjustable power supply that does not require high load current. The experience of using this type of motors showed that they are highly practicable in various fields of application, starting with anything like toys and ending with computer ventilators. Such popularity of the device is explained by that it only requires low current. Sometimes we need to adjust the rotation frequency of the motor or its speed to achieve the required mode for performing a certain task that a certain electric motor is designed to execute in a certain model or device. This is easily achieved using a regular adjustable voltage stabilizer that is compatible with any power supply unit. The basic circuit is built based on an LM317 stabilizer and several additional elements in the binding. The device is far from being new and it used in many power supply sources. However, it is very useful. Because of the low current consumption of direct current motors, even those used in computers - 250-350 mA, a stabilizer can easily manage many hours of daily load. Adjustment of motor speed only affects the rotation frequency forcing its own capacity to change in either direction depending upon the speed.
http://www.youtube.com/watch?v=tDfrwa4p-T4&hl=en
Labels: Control
