Hello all,
I have been curious about the what they call an scr motor controller/dimmer for sale on ebay.
https://www.ebay.ca/itm/12400661880...H9SjFXtDMRbLhDsh6vPQ|ampid:PL_CLK|clp:2334524
I have purchased one and reverse engineered the circuit. It makes some sense to me but not entirely. I am not sure that I understand why the entire circuit is sitting on the AC power rail with no reference to ground.
The circuit does not use scr's it uses a triac driven by a diac. Both the 4000 watt and 10000 watt controllers are identical in their layout except for the size of the components and the 10000 watt controller has a 24v cooling fan circuit added. I know that these circuits output AC and have to be put through a bridge to run a dc motor.
These are being used by many hobbyists to run machinery and they do work. They need to be run through an inductor and cap to remove the noise though.
Any thoughts/explanation on how these things work?
I have been curious about the what they call an scr motor controller/dimmer for sale on ebay.
https://www.ebay.ca/itm/12400661880...H9SjFXtDMRbLhDsh6vPQ|ampid:PL_CLK|clp:2334524
I have purchased one and reverse engineered the circuit. It makes some sense to me but not entirely. I am not sure that I understand why the entire circuit is sitting on the AC power rail with no reference to ground.
The circuit does not use scr's it uses a triac driven by a diac. Both the 4000 watt and 10000 watt controllers are identical in their layout except for the size of the components and the 10000 watt controller has a 24v cooling fan circuit added. I know that these circuits output AC and have to be put through a bridge to run a dc motor.
These are being used by many hobbyists to run machinery and they do work. They need to be run through an inductor and cap to remove the noise though.
Any thoughts/explanation on how these things work?
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