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Brass induction furnace - what frequencies are used?

Brass induction furnace - what frequencies are used?

Brass induction furnace - what frequencies are used?

(OP)
Hello!

I just got a question about inductions coils for brass furnaces. There seems to be an inter-turn insulation problem.  Coil manufacturer moved to new facilities and it seems that he lost some of his best and most experienced guys. There have been three inter-turn shorts in the coils after the move. So something is not being done right.

The guy that phoned me (user) says they use 50 Hz. I am more used to steel and iron furnaces and there we always (or mostly) see 300 - 600 Hz, depending on condition.

The coils are long, some 15 feet. They are used to heat the brass before it is extruded into bars.

Any comment or tip is very welcome. I do not have the time to visit the factory, but advice on what to look for would be of great value.

Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

RE: Brass induction furnace - what frequencies are used?

Gunnar
Likewise, I have only ever been involved in 250Hz systems. I found the company we did some work with a few years ago to see whether they provided any info on brass furnaces but only steel/iron: http://www.eges.com.tr/eng_tablo.html
 

RE: Brass induction furnace - what frequencies are used?

(OP)
OK, Patrick. Better than nothing.

Now - I'm waiting for the Top Brass!

Other side of pool? Anyone?

Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...

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