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Induction heater using the famous mazzilli vladimiro flyback driver? Answered

After being done with 555oscillators and other hv projects. i am now interested with induction heater. i have seen multiple schematics on how to make them. However the parts needed are expensive. there was a similar question posted last year but did not have enough information etc. i have seen some people making the induction heater with the zvs driver of mazzilli, but did not give enough information on how to make it. 

i need to wind 8+8turns on a flyback transformer core and 4 turns of thick wire one the other side to give more current.

1. can i wind the 8+8 turns on a toroidal core instead of a flyback transformer core(i don't want to break it even if i have more than 5)

2. for the capacitor 0.68uf. can a big 10uf 400v~ capacitor be used instead? or should i use 3X 0.22uf 400v~ in parallel so that it don't over heat due to high currents?

3. Will 2X 12v 35Ah car battery in series be enough to power the driver? i mean, will it drain the battery too fast which will lower its life span or should i use a rewound MOT?

 4. Will a 2500uf 50v capacitor connected across the power supply be needed to smooth the current or will the circuit run finely without it.

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The MadScientist (author)2011-04-02

I've made an induction heater with a Mazzilli driver before it was by accident I had wrapped the wire around a 1 1/2 inch pvc pipe it melted the pvc and the wire insulation. I would try this first with copper pipe or thick wire first before I start complicating things. Have a look at this website http://uzzors2k.4hv.org/index.php?page=phys it has two induction heaters and the second one looks quite simple.

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7654321 (author)The MadScientist2011-04-04

How did you melt PVC? I thought induction heating only worked on conductive or magnetic materials.

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The MadScientist (author)76543212011-04-05

I did not know that so I don't know. The plastic melted and shrivelled a bit as well as the wire insulation. It did make a metal rod hot enough to burn me so it does work.

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ARJOON (author)lemonie2011-04-03

yeah i've already seen it

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lemonie (author)ARJOON2011-04-03


And you followed the link http://www.richieburnett.co.uk/indheat.html to read about the theory etc?
(I don't have better at the moment)

L

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ARJOON (author)lemonie2011-04-03

of course. after making several researches i've found on how to increase the performance of the flyback driver and converting it to an induction heater. by the way. which one is better a toroidal core or a flyback transformer core to isolate it.

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steveastrouk (author)2011-04-03

I was going to post the same link as Lemonie !

Its not "harder" to make a proper job of it, rather than mess around with the wrong circuit - the right circuit puts the energy where you want it, in the load, and not in the driver circuits.

Steve

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steveastrouk (author)2011-04-02

Induction heaters are not flyback circuits.

Steve

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ARJOON (author)steveastrouk2011-04-02

i know. but it can be used to make it. i have seen lots of people doing it. The frequency is high enough to heat heat the metal.

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