Mark Lagomarcino
New Member
Hello,
I am trying to design a current limiting circuit for a low voltage AC power supply for use with my toy trains. The output is 18 VAC and I would like to electronically limit it to 10 amps. I would rather not use fuses or a circuit breaker but an electronic limiter. Am I crazy or is this possible?
I am aware of the vast numbers of current limiting regulators for DC but this is AC output. Could I use a triac in series with a resistor on the output and a circuit that would turn off the triac when the voltage drop across the resistor reached a preset level but turn it on when the voltage was below that level? Is there a simpler and more eloquent way to accomplish this?
Breakers just don't seem fast enough and I would rather spend my money on a circuit than a bunch of fuses. (They blow as soon as there is a derailment or other glitch).
What are your esteemed opinions? Thnaks in advance.
Mark
I am trying to design a current limiting circuit for a low voltage AC power supply for use with my toy trains. The output is 18 VAC and I would like to electronically limit it to 10 amps. I would rather not use fuses or a circuit breaker but an electronic limiter. Am I crazy or is this possible?
I am aware of the vast numbers of current limiting regulators for DC but this is AC output. Could I use a triac in series with a resistor on the output and a circuit that would turn off the triac when the voltage drop across the resistor reached a preset level but turn it on when the voltage was below that level? Is there a simpler and more eloquent way to accomplish this?
Breakers just don't seem fast enough and I would rather spend my money on a circuit than a bunch of fuses. (They blow as soon as there is a derailment or other glitch).
What are your esteemed opinions? Thnaks in advance.
Mark