AC current regulater ACR - Electronic Circuits Projects Diagrams Free

lexdean · 11th July 2009, 10:46 AM

Has any one seen a circuit that regulates or limits AC current.
That is overall current used.

Uses a Trac or SCR in its design. This is for a transformer or Motor.

I wish to adapt it so it has adjustable current limit.

Hero999 · 11th July 2009, 11:55 AM

If depends on what you want.

Do you need a constant current source or just over load protection?

For now I'll assume you need overload protection.

If it's <50VAC then you can get Poly switches (PTC resistors) which go high impedance when an overload is encountered.

At higher voltages you'll need to use a circuit breaker, most are manula reset but you can buy ones that auto reset.

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11th July 2009, 10:46 AM	#1
lexdean	AC current regulater ACR Has any one seen a circuit that regulates or limits AC current. That is overall current used. Uses a Trac or SCR in its design. This is for a transformer or Motor. I wish to adapt it so it has adjustable current limit.

11th July 2009, 11:55 AM	#2
Hero999	If depends on what you want. Do you need a constant current source or just over load protection? For now I'll assume you need overload protection. If it's <50VAC then you can get Poly switches (PTC resistors) which go high impedance when an overload is encountered. At higher voltages you'll need to use a circuit breaker, most are manula reset but you can buy ones that auto reset. __________________ I do not answer private messages asking for help because no one else can: benefit from advice I may give or correct me if I'm wrong. Please ask on the open forum if you have a question and I'll be happy to help, if I know the answer.