Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
A bit of bedtime reading for you DustyB
......see attachment for good explanation of 555 timer functions and applications ..... a versatile little chip this is!
Rotarymaker
Not a problem DustyB.
I didn't know what current drive was needed for your COP, so instead of creating possibly a weak/failure point within Debe's circuit I over designed it with "a belts and braces" type job.
If your 555 is driving it OK and not getting hot to touch, then we can assume...
Hi all,
To save confusion and constant forward and backward searching, and not to try and take anything away from Tcmtech's info, I've moved / continued my thread on my Trident 15 Rotary Converter project, to my first request info page here...
Hi OldLes,
Really appreciate you taking time to reply, thanks.
I stripped out the autotransformer (after carefully noting it's wiring) and wired it to my 230V supply......exactly 415V output I'm getting from the "third top leg" which is good news.... at least it's still working as should...
No probs OldLes,
Here's the link as requested.....a bit of a long one!
https://www.electro-tech-online.com/threads/rmk-trident-15-15hp-rotary-3-phase-converter-info-required.133035/
I must get a few photos up onsite to perhaps raise your/others interest levels.
appreciate your...
Aghh come on OldLes,
Nobody is asking for your resignation from this site, can you not accept just a little ribbing for your sales pitch of your rotary converter?
If not, then please accept my apology for offending you......sorry.
I know you've helped others, please don't take it all to...
Not a problem DustyB, hope it works for you.... if not get back to us.
Another thought on your coil burning up.... make sure you have a sparkplug in the coil with a max gap of about 1.2mm.
If you are just arcing it over a longer distance to earth/ground, that'll surely cause coil failure...
Very interesting indeed ..... cannot wait for your upcoming posts on this Tcmtech!
A little while back I joined this great site and started a new thread requesting info on an old (UK 230V) commercially built 15HP 230V to 415V converter. ..... a RM Trident 15. I got no replies, but a lot of...
Hi DustyB,
Try this (see attachment) ..... you may wonder why have so low value of resistor for keeping transistor off when points are open ??..... it's to allow for a reasonable current (~66mA) to flow thru points when they close, as points tend to tarnish / get dirty in an engine...
Hi again Ioanos,
I had a quick browse on web and found more info for you.
Check this website.....
http://issuu.com/doeboy1966/docs/sm_master_dc_mastertig_dc_v1.0en?viewMode=magazine
....click on the manual picture and you can read online some of the service manual
I have copied/pasted fan...
Hi Ioanos,
I have attached owner/user manual for your welder.....it says fan (cooler?) should start as soon as you begin to weld and then should continue to run after you finish welding......so I do not think the fan is triggered to run when inside welder temperature reaches a certain value...
Hi Willen,
Please try a 22uF.....it will need to be mounted close on your circuit board as shown on Harrys website, as I listed for you above.
He quotes this necessary mod from his website .....
If this doesn't work, can you tell us what way your circuit layout is?.....is it the same as...
Ahh DustyB,
I see what way you are thinking now.
The issue you are probably trying to prevent is the back emf voltage generated by the relay coil going open circuit, which may possibly destroy the transistor input stage of the COP.
I would suggest you try a 1N4007 diode across the relay...
Sorry ING,
Cant find any info on control circuit diagrams / schematics, but found you some datasheets on the triac plus a possible equivalent from Mouser.
The closest equivalent from Mouser is a NTE56018 see attached pdf datasheets.
hope this helps (a little)
Rotarymaker
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