Trying to understand which properties of circuit affect triac phase range, is it possible to control near whole period, or it have some limitations - on net found a couple circuit, that claims almost full control, but in the past I build some simple circuit and remember that it do only half of control over triac?
triac phase control 0-100%
Collapse
X
-
I hope that you are not trying to build up this circuit because you buy them already made
Here is an example of one type that is used in battery stud welders
100A Current Spot Welder Machine Time Control Digital Display Controller Board
https://www.ebay.com/itm/35458182072...Bk9SR868vp77Yw
Here is another one but this version has a control transformer which the one above dose not have but you have to add one
https://www.ebay.com/itm/28300956049...1001%26algo%3D
Here is another type
10000W SCR Digital Voltage Regulator Speed Control Dimmer Thermostat AC 220V US
https://www.ebay.com/itm/23506555387...Bk9SR5jq6J_7Yw
This is is the same type but it does not have a digital display
https://www.ebay.com/itm/17190706944...Bk9SR5rq6J_7Yw
I hope this helps help you this type of controller is meant for high transformer applications you can use them for incandescent light bulbs as well but it is over kill for this applicationLast edited by sam_sam_sam; 06-02-2024, 11:44 AM. -
Found some interesting information about triac
https://m.youtube.com/watch?v=jjTr7DD2ouE
TRIACs – The Dirty Details (3/3): Practical Considerations
Have someone knowngoodworking circuit for full control over triac (idealy 1-99%)Comment
-
just read the datasheets, they refer to "quadrants" that is the low rising wave, the high rising wave, and the 2 halves as it falls.
here's some examples
Comment
-
Found some interesting information about triac
https://m.youtube.com/watch?v=jjTr7DD2ouE
TRIACs – The Dirty Details (3/3): Practical Considerations
Have someone knowngoodworking circuit for full control over triac (idealy 1-99%)
Comment
-
Anyway, all videos presents control triac in therir narrow midrange or so, I can not clearly see to one circuit that fully start at beginning after zero cross and control cutoff till end.
Now I found that switching phase can be control in reverse order also, so it is interesting point to me, it not shock end device so much, but nothing to conclude how circuit look...
For control mains transformer primarry windings, is it better (efficient) to triac act normally or in reverse order?Comment
-
Plus the fact that I do not think that you can have it all either you do leading edge or trailing edge but do not think you can use the both edges at the same time so if that is the case then you have to decide what uses the most of the sign wave and the most efficient use of it
Now to me is how smooth the transition from fully off to fully on the question is how attainable is this process and how difficult is going be built it and what are trade offs going to be this is the question and the question also is can this be done with a transformer being controlled this is what I am interested in and have been for a very long period of time and I have not really found the perfect solution to this question and issue with controlling a transformer
This is I have been following this post now I have found a few solutions but you are giving something up the either the transition is not very smooth or you do not get fully off or fully on or it suddenly turns on and it is not very smooth transition and suddenly fully on it is usable but I more interested in something that is smooth transition for the majority of the transition if I have give up fully off and fully on because if I going to use it for battery stud welder this is the consideration that has to be considered for best results
This is also has to be be reliable and repeatable and consistent each time to achieve this is the hardest part of this processLast edited by sam_sam_sam; 07-01-2024, 06:20 AM.Comment
-
Last edited by sam_sam_sam; 07-01-2024, 06:19 AM.Comment
-
Because if you use a battery stud welder transformer it not the same as a microwave oven transformer because if use a microwave transformer you can use it with out a transformer controller but if you try this method with a battery stud welder transformer you will trip a 20 amp breaker even a 30 amp breaker I once tried a 50 amp breaker and it tripped that one as well and I had not tried to weld the the tabbing yetComment
-
you need a slower breaker to ignore the inrush current.
that was the problem with the old 1st gen welders - a friend had one.
the inrush is almost 3 digits so upping the breaker current doesnt help - you have to use a slower one.
they sell them for industry for places with big electric motors like metal shops.
Comment
-
This app note is good for what you are trying to do. More can be found in figure AN1003.12 or Teccor App note AN1003
My notes and schematic for eBay/Ali 4,000W power controller after it died - TWICE. Cheap triac, then the pot smoked. It's a good start for a simple circuit.
The hard part is getting good adjustment range, say 50% with the pot at 50% rotation.
Comment
-
This app note is good for what you are trying to do. More can be found in figure AN1003.12 or Teccor App note AN1003
Comment
Related Topics
Collapse
-
by прямоAnyone is familiar with a TRIAC circuit?
I came across this schematic, and I built it, but I can't seem to figure it out why I'm getting a low AC voltage output at the TRIAC terminals.
With 230V AC hot side at the TRIAC MT2, I measured 60V AC between MT1 and neutral side when the comparator output LED indicator is on, and 20V AC when it is off.
Same result if 230V AC hot side is at MT1, and I measured between MT2 and neutral side.
My heating element doesn't work with 60V AC. It's not even getting hot and the thermocouple amplifier output is a...1 Photo -
by vincentedelHello,
I'm having an issue with the Samsung 740n's phase control setting. When I use the automatic adjustment, it sets the value to around 54 (with a range of 0-100), and the picture looks clear and sharp. However, after some time—like after playing a game—the text starts to look blurry. When I auto-adjust again, it may increase the value to 80, and everything becomes sharp once more. Yet, after a while, whether it's a few hours or a day later, the same blurriness returns, and I have to adjust it again.
I'm using the Samsung 740n monitor drivers instead of the default plug-and-play...-
Channel: Troubleshooting Computer Displays
-
-
by sam_sam_samI was working on this machine yesterday and I now going to use an incandescent lights instead of a fuses to figure out what the issue is with it blowing control voltage rail but this not the only issue the coolant pump failed the meager test as well as the main motor as well this motor has 12 motor wire leads instead of the normal 9 wires
This metal lathe has a weird motor setup it has a soft start motor with a “Y” and a delta type of motor winding setup and it is not done in the motor pucker head enclosure it is with four different contactors wired in a configuration I have not... -
by AstonishedHi friends of electronics
What you see in the video and pictures attached is the circuit for charging the batteries of a DC motor.
The problem is that this circuit cannot charge the batteries (3 1800mAH NiMH batteries) any more. When the circuit was OK, its green LEDs lit up one at a time to show that the batteries have charged more. But now that the circuit is flawed, LEDs light up as you see in the video and at the same time successive beeps are heard.
Please help me fix this circuit.
(the datasheet of the IC: https://pdf.datasheet.live/28... -
by privato89Hello everyone,
I'm facing an issue with a HEG-001 motherboard that is unable to complete the Second-Stage Boot. I'd like to start directly with my conclusion, which is the decision to replace the MAX77621AEWI chip, and understand if it could be a correct evaluation.
Before I dive into the process that led me to this decision, I want to mention that I have a fully equipped lab where I can perform any kind of tests.
Let's begin:
Following some guides online, I tried to understand how the Boot phase of the Nintendo Switch works, and what are the... - Loading...
- No more items.
Comment