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Monday, 10 September 2012

Speed Controller For DC Motor

Speed control for dc motor (electric motor) can be implemented using open loop or closed loop. Closed loop controller, also known as servo controller, or a feedback control, gives the best performance since the loop will maintain the actual speed to follow the reference. In simple application, an open loop controller can be enough if the load is constant, such as in fan control (PC fan speed control). This dc motor control circuit uses PWM (pulse width modulation), gives a better efficiency than using linear driver. Here is the schematic diagram of this PWM motor controller. The LM/NE 555 timer is use to generate the PWM pulse which duty cycle is control by the potentiometer use in the circuit.


The report and transient response is download by electrodata.

Download Report





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Labels:Circuit,LM555, PWM, Speed Control,

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