Author Topic: Using triac as AC power line switch  (Read 194 times)

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Offline XaviPacheco

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Using triac as AC power line switch
« on: June 18, 2018, 03:53:14 am »
Hi,

I attach a circuit where I pretend to control the AC input to a bridge rectifier. I usually see that triacs are used in AC switching and phase control applications such as motor speed and temperature modulation controls, lighting controls, and static switching relays. In this case I just want to control the moment when the bridge is going to be fed. The Triac that I will use is 1-3 quadrant triac. I've seen 4 quadrant triacs, but not so common.  Do you think that it could work the way I have arranged the circuit?
 

Online james_s

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Re: Using triac as AC power line switch
« Reply #1 on: June 18, 2018, 04:00:12 am »
It looks reasonable. It's certainly not unheard of to use a triac based SSR to control the power of something.
 
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Offline Yansi

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Re: Using triac as AC power line switch
« Reply #2 on: June 18, 2018, 04:04:25 am »
You know... you have just invented a SSR.  ;D

//EDIT: And btw, you circuit lacks inrush current limiting. Add at least a suitable NTC in series with the input.
« Last Edit: June 18, 2018, 04:10:37 am by Yansi »
 
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