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richb Posted - Feb 22 2015 : 04:02:26 AM
Had a question on the AC Motor Speed Controller circuit. Would this circuit hold up with a 15A load?

Would the Triac need to be larger than 15A? I did not notice a Diac with a 15A rating. What would be suitable for a Diac ?

Could you advise a resistance value for R13 given the above load ?

Thank you
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richb Posted - Feb 28 2015 : 2:36:58 PM
Aaron, thanks for the note.
I have a single phase 120V 15A saw that currently runs around 3400 rpm. I would like to reduce the rpm to around 1300. I thought the above mentioned circuit, configured for the load, might allow for this.
Aaron Cake Posted - Feb 28 2015 : 10:27:26 AM
As the notes say, you'll need to choose the TRIAC based on your load. Load ratings will be in the datasheet. Once you have the TRIAC, then R13 can be adjusted.

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