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soft starter by using thyrister with arduino

Thread starter #1
asalam o allikum

I am planning to start building a soft starter by using arduino which can control inrush current of three phase induction motor.

by using Arduino I don't know how to trigger the thyristor.i don't have any code or relevant data of this project.

can anyone know about it?????????


Well-Known Member
Most Helpful Member
Use optical-isolation between the Arduino ports and the gates of the thyristors. Only safe way to do it...


Well-Known Member
I built one for a Universal motor, but a 3ph one is called a soft start contactor. They can be purchased ready made.
See the Fairchild app note AN-3006 for suitable opto's . you will need a Random phase type for each phase, rather than zero crossing version.

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