This triac based 220v ac motor speed controller circuit is designed for controlling the speed of small household motors like drill machines.
Ac motor speed controller circuit diagram.
Amir the circuit has the following salient features.
The setting of p1 determines the phase of the trigger pulse that fires the triac.
The speed of an electric motor is controlled by controlling the power source of the motor.
One very nice example is fan regulator in which a fan motor is 1 ac motor used and its speed is varied using diac triac method.
Varying speed of ac motor by means of changing firing angle of any thyristor is very widely used method.
Ac motor speed control using triac.
The speed of the motor can be controlled by changing the setting of p1.
The simplest method to provide a variable power supply is by providing a variable series resistance between the motor and the supply and this is common in ac motor since the series resistance can be replaced by a series inductance that doesn t.
Here is a very simple example of ac motor speed control given by changing firing angle of triac with the help of micro controller 89c2051.
You can use household equipment like a drilling machine to control the rotating speed of it.
Simple ac motor speed control circuit tutor.
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Simple ac motor speed control circuit using bt136 triac.
Back emf looped ac motor speed controller circuit.