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electrical:triac [2024/04/05 22:48]
frater_secessus [further reading] 		electrical:triac [2024/06/25 11:10] (current)
frater_secessus [appropriate loads]
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 ===== appropriate loads ===== ===== appropriate loads =====
  
-* analog((not digital or electronic)) resistance loads like heating pads, crock pots, hot plates, immersion heaters, rice cookers, //bento// "lunchboxes", coffee grinders, etc.  Warning:  anything with electronics like displays, etc, will not work right and could be damaged.  +  * analog((not digital or electronic)) resistance loads like heating pads, crock pots, hot plates, immersion heaters, rice cookers, //bento// "lunchboxes", coffee grinders, etc.  Warning:  anything with electronics like displays, etc, will not work right and could be damaged.  
-* simple devices with motors like fans, routers, etc. Warning:  fancy "brushless" motors will not work right and could be damaged+  * simple devices with motors like fans, routers, etc. Warning:  fancy "brushless" motors will not work right and could be damaged
  
  
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 There is little clear information on the topic since running them off inverters is an extreme minority position, but it appears that speed controls work best on PSW inverters.  They may run on MSW but seem unable to reduce power less effectively (see below) and may run hotter.  There is little clear information on the topic since running them off inverters is an extreme minority position, but it appears that speed controls work best on PSW inverters.  They may run on MSW but seem unable to reduce power less effectively (see below) and may run hotter. 
  
-While resistive loads don't care about MSW vs PSW, inductive loads like motors will run hotter and "notchier" on MSW.  So you might want to run the latter off PSW whether or not a controller is used. +While resistive loads don't care about MSW vs PSW, motors will run hotter and "notchier" on MSW.  So you might want to run the latter off PSW whether or not a controller is used. 
 ===== actual examples of use ===== ===== actual examples of use =====
  
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 Note from secessus:  Note from secessus: 
  
->> 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 until further information is forthcoming **we might ballpark speed controls on PSW reducing power to ~50% of normal and MSW to ~60% of normal**. But another Amazon reviewer((again, can't link)) says: So until further information is forthcoming **we might ballpark speed controls on PSW reducing power to ~50% of normal and MSW to ~60% of normal**. But another Amazon reviewer((again, can't link)) says:
  
 >> ...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.
 +
 +See [[https://www.youtube.com/watch?v=-ilWK_VVEzc&t=710s|this video]] to see the pot adjusted. After adjustment secessus was able to hold 33% of rated power stably;  any further adjustment caused the circuit to drop out. 
  
  
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   * [[https://circuitdigest.com/tutorial/triac-switching-circuit-and-applications|TRIAC switching circuit and applications]]   * [[https://circuitdigest.com/tutorial/triac-switching-circuit-and-applications|TRIAC switching circuit and applications]]
   * YT:  [[https://www.youtube.com/watch?v=jS9ANqJf-ZY|TRIAC AC Dimmer Circuit - How to dim AC Power for Motors and More]], especially the oscilloscope section that starts [[https://youtu.be/jS9ANqJf-ZY?si=Hf2VZkyTCwSry9im&t=110|at 1:50]].   * YT:  [[https://www.youtube.com/watch?v=jS9ANqJf-ZY|TRIAC AC Dimmer Circuit - How to dim AC Power for Motors and More]], especially the oscilloscope section that starts [[https://youtu.be/jS9ANqJf-ZY?si=Hf2VZkyTCwSry9im&t=110|at 1:50]].
 +
  
  
electrical/triac.1712371729.txt.gz · Last modified: 2024/04/05 22:48 by frater_secessus

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