Re: power transformer design ...

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "RIAA/MPAA's Worst Nightmare" <mike.marcum-at-zoomtown-dot-com> 

I see ferrite U-cores on ebay every now and then. They are quite huge and
made for industrial induction heaters/giant power supplies.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, December 03, 2003 10:08 AM
Subject: power transformer design ...


 > Original poster: "Rajesh Seenivasan" <rajeshkvs-at-hotmail-dot-com>
 >
 > Dear forum members,
 >
 > I know this topic doesnt exactly match with the Tesla mailing list. But,
 > when I saw few discussions
 > here I understood that the Tesla experts can solve my problem too ...
 >
 > I am trying to design a Tesla coil and an induction heating system at my
home.
 > I need to design a power transformer. It should be:
 > Ferrite cored,
 > operates in the freq range 20KHz to 200KHz,
 > A 25KW inverter drives the primary coil,
 > Ratio between primary and secondary is 20:1
 > ... and I want that to be very economical
 >
 > My assumptions(!) for this design are:
 > Any EE cores available in the market, the length of core (parameter A) can
 > be 100mm-150mm.
 > I can have 2 or 3 such cores placed parallely to form a single EE core.
 > The primary winding can have "X" turns of insulated #14 wire used for
house
 > wiring.
 > The secondary will be 8mm copper tube with few turns, which will be used
as
 > the Induction coil which heats the metals.
 > The whole transformer will be dipped in oil.
 > I assume that 420Vpeak-peak, 40A current should flow through the primary.
 >
 > Any suggestions for the design will be very helpful for me.
 > Thanks in advance.
 >
 > .... also, anybody knows about companies which manufacture large ferrites
?
 > I get small ferrites only
 > in the electronics market nearby.
 >
 > Thanks and regards,
 > Raj.
 >
 >