Three Phases, Hight Heat, Regulation
I have a smith brother who's making swords and other art steel pieces, and he is needing a heating oven with a precise heat regulation at high heat.- The objectives : power source : 230/400 V, 3 phases with neutral 50 Hz (why not 60 Hz !)- Power : over 7 kW (10 Arms by phase)- Heat : 1100 - 1200 °C
I have a smith brother who's making swords and other art steel pieces, and he is needing a heating oven with a precise heat regulation at high heat.
- The objectives : power source : 230/400 V, 3 phases with neutral 50 Hz (why not 60 Hz !)
- Power : over 7 kW (10 Arms by phase)
- Heat : 1100 - 1200 °C
- Precision of regulation : +/- 5 °C (needed to harden some stainless steel).
the regulation point should be between 700 and 1000 °C
take a look at the organigram linked.
Discussie (3 opmerking(en))
ARES_XL 10 jaar geleden
After study of the AN982-D from Motorola,
ARES_XL 10 jaar geleden
I am working on a simple power electronic consepte of one triac by phase and neutral surveil for fault finding.
I will add two relays to assume insulation at stop state, one to remove power and the second to connect ouput at eath.
But I have a problem to design the triac level.
The selection of the power triac and the optotriac driver is quite simple (insulation tension, rms intensity, Igt Value) so that I found a Q6010L4 of LittleFuse and IS621XSM of ISOCOM.
The problem I face to is the fact that I don't know how to calculate the res to limit 'Igt' through the optotriac and the gate of the power Triac. I need to limit it around 25mA but the design exemples I found on the net and on datasheets seems to limit it broadly above this values (around 1A !!!) so i don't know what to think about ! I Should try some simulations.
The good thing is that I don't need snubbers (because of the only resistive load).
ARES_XL 10 jaar geleden
The heat measurement should be with a K type probe, because of the coste, most popular, most linear, most ... !
Some A.D. products (or other) can be used to convert the measurement, but we probably need a correction array to obtain a measure in the required precision.