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electrical:triac [2024/04/05 19:09] frater_secessus [actual examples of use] |
electrical:triac [2024/04/05 19:15] frater_secessus [actual examples of use] |
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{{ https:// | {{ https:// | ||
- | * some devices **can work on less power** than they naturally pull. Examples: | + | * some devices **can work on less power** than they naturally pull. Examples: |
- | * a TRIAC((TRIode for Alternating Current)) is a particular circuit component used to do this magic. | + | * a TRIAC((TRIode for Alternating Current)) is a particular circuit component used to do this magic. |
* the load can typically be reduced to ~50% of its normal draw | * the load can typically be reduced to ~50% of its normal draw | ||
- | * running the load at a low percentage (50% of normal) will cause less heat in the TRIAC than running it at a high percentage (90% of normal).((we might argue that if you can run it at 90% maybe just remove the TRIAC and run the load at 100% the normal way)) | + | * running the load at a low percentage (50% of normal) will cause less heat in the speed control |
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===== inverter types ===== | ===== inverter types ===== | ||
- | There is little clear information on the topic since running them off inverters is an extreme minority position, but it appears that TRIACS | + | There is little clear information on the topic since running them off inverters is an extreme minority position, but it appears that speed controls |
+ | While resistive loads don't care about MSW vs PSW, inductive loads like motors will run hotter and " | ||
===== actual examples of use ===== | ===== actual examples of use ===== | ||
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>> when I ran a measured 928w hotplate at the lowest controller setting the power was ~550w, or about 60% of normal full power | >> when I ran a measured 928w hotplate at the lowest controller setting the power was ~550w, or about 60% of normal full power | ||
- | So putting these together | + | So until further information is forthcoming **we might ballpark speed controls |
>> ...there is a hidden adjustment potentiometer inside for minimum power setting. Wall dimmer switches have these as well. I was able to adjust it, but I’m waiting for my tachometer to get it where it needs to be. By the sound of the motor, I can tell it will go down enough. They really should disclose this adjustment in the instructions… Note: The hidden adjustment is soldered onto the top side of the PCB inside but you need to use a small flathead screwdriver to adjust it from the back after removing the back cover. | >> ...there is a hidden adjustment potentiometer inside for minimum power setting. Wall dimmer switches have these as well. I was able to adjust it, but I’m waiting for my tachometer to get it where it needs to be. By the sound of the motor, I can tell it will go down enough. They really should disclose this adjustment in the instructions… Note: The hidden adjustment is soldered onto the top side of the PCB inside but you need to use a small flathead screwdriver to adjust it from the back after removing the back cover. | ||
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Note that the Amp rating on these is at 120vac. | Note that the Amp rating on these is at 120vac. | ||
- | * harbor freight sells [[https:// | + | |
- | * Amazon has [[https:// | + | * Amazon has [[https:// |
===== further reading ===== | ===== further reading ===== |