Induction Heaters
Induction Heaters
(OP)
Looking for a company with expertise in custom induction heater applications. We have some induction heaters on a vessel that was built back in '67. two of the four heater coils have failed recently. We need a repair/replacement.





RE: Induction Heaters
<nbucska@pcperipherals DOT com> subj: eng-tips
read FAQ240-1032
RE: Induction Heaters
But be aware that these coils, plus the meltable load, and large capacitors within are all parts of a resonant circuit. Various induction/vacuum furnaces have ways of altering the frequency to track the resonant point as it varies with the load. If its as old as '67, it just might have PCB oil in those capacitors, and maybe other places (oil-cooled transformers). Look up PCB, which I think means poly-chloro bi-phenyl, and appreciate the hazard of the stuff, and the expense of its disposal. "Consarc" and "Electrak" are some names I recall, but I don't know which companies sold them, or might have parts. I suspect that if you want to put a 30+ years old heater back into operation, you may have to roll your own - with some care!
RE: Induction Heaters
There are three coils altogether on this vessel.
Each rated at 10KW. Each draws ~30 to 35A when energized.
RE: Induction Heaters
The structure sounds basic. Plain wire coils in an induction furnace are not a very wear-out item. Even if electrical kit is not your area of expertise, isolate the supplies (safety!!) and dare to look. The structures are essentially mechanical. The main degradation is likely to be at connection surfaces, corrosion, local heating, spillage and build-up, etc. Even if it comes to replacing the conductors, common sense rules. Supports and insulation are likely to require some care. Think about materials suited to the temperatures they might need to stand. If all thats needed is a clean-up, it is very likely you could contrive some help, if not do it in-house.
Of course... if each coil is driven from separate parts of the energy control kit, it might be as simple as finding the right fuses/contactors!
RE: Induction Heaters
CAF
RE: Induction Heaters
http://www.AjaxTOCCO.com
Fred Specht
RE: Induction Heaters
Anyway, I have successfully repaired the induction heater by simply rewinding hi-temp wire in the same manner as the original. System has been operational for 1 month now...
Thanks.
CAF
RE: Induction Heaters
RE: Induction Heaters
RE: Induction Heaters
Chaos