Author Topic: My Horvath replication project by Steve  (Read 6527 times)

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Re: My Horvath replication project by Steve
« Reply #8 on: June 20, 2017, 22:12:59 pm »
Here is some info about the saturation and what i talk about the distortion of the magnetizing current and waveform

i forgot to remember you about the primary resistance and current that creates a voltage drop and that must be considered as it lowers the effective voltage being applied to the primary

I told you once that i hated transformers, did i?

Yes! Thats the thing. 300v and 22amps must be accepted by the primary.
Thats an easy calculation.
13 ohms must be the resistance of the wire.
But how does that looks like at 10khz in stead of strait DC?


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Re: My Horvath replication project by Steve
« Reply #9 on: June 20, 2017, 22:28:35 pm »
And the capacitor in series with the primary also limits the current, is it?
C5



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Re: My Horvath replication project by Steve
« Reply #10 on: June 20, 2017, 22:51:16 pm »
ok. I think i have to look at the complete charging part of the primary coil of tr2.
C5 gets charged in series with Prim coil.
But start to conduct when thyristor 1 is set to conduct.
That releases the charge of c5 into the primary, i think...

So ill guess that the 13 ohms are not needed? It will be much less to be able to receive the charge at a 10khz rate?


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Re: My Horvath replication project by Steve
« Reply #11 on: June 21, 2017, 09:39:26 am »
This 13 ohms is the xl or xc of the circuit até resonance isn't it?

This means that applying 300v in parallel will cause 22 amps to recirculate  at the primary there may be small power consumption while there is 6600 watts there circulating

There is also powerconsumption from the secondairy, is it?

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Re: My Horvath replication project by Steve
« Reply #12 on: June 21, 2017, 18:34:10 pm »
In my view the c5 is charged by the secondaries of t1 and thru primary of t2

When the thyristor fire the c5 discharge into the primary of t2 it also shorts the secondary of t1

He says on the patent that the 300v 22a is 0.1 duty cycle 10khz

He says that all this consume 480w

This mean that the impedance of the load may be around 13 ohms


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Re: My Horvath replication project by Steve
« Reply #13 on: June 22, 2017, 08:21:11 am »
Fabio, what is your best gues for the tr2 windings?

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Re: My Horvath replication project by Steve
« Reply #14 on: June 22, 2017, 10:06:51 am »
Man given the high fluxs involved i would start with the primary having very low resistance to not have any ohmic loss there... the primary should have 100mohm or less  because if you remmember the 22 amps x22 amp  x 0.1 ohm will cause 48wats loss only at the primary

(corrected numbers)

Here is the deal i think it should be used like it is an air core since the frequency 100khz of the pulse it will cause core heating

its a power pulse transformer 500w ( maybe air core toroidal would be our best option... or even iron powder core if there was a big enough core to do that ) must be one capable of 5kw @100khz i guess

as we know the c5 value we can estimate the required L1 inductance (with the secondary loaded of course)

the secondary he says is step up or also in some patent he say it can be step down.. need to think a little i will write more next post

« Last Edit: July 09, 2017, 21:18:36 pm by sebosfato »

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Re: My Horvath replication project by Steve
« Reply #15 on: June 22, 2017, 10:48:30 am »
« Last Edit: June 22, 2017, 19:44:54 pm by sebosfato »