Author Topic: Retry N1001  (Read 6257 times)

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Re: Retry N1001
« Reply #112 on: July 13, 2018, 22:06:26 pm »

some conclusions we have discussed over this years with nice equip tests


« Last Edit: July 17, 2018, 09:44:38 am by sebosfato »

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toroid pdf
« Reply #113 on: July 17, 2018, 17:02:20 pm »
i found here reference for calculation of bmax of unipolar transformer to use a factor of 1 instead of 4.44 and this are a reliable source as they work with it!

doing this makes the transformer need 4 times more turns for the correct use of the core

for the 4.44 factor i found different contraditories explanations for it.. but i guess the most correct is that

 1.11* the factor is the adaption to sine wave...

from the 4:

2 is because off you charge the core two times in a cycle (case of sine or square wave)

and 2 is because charging the core in both ways you can actually use double the bmax
 
using unipolar pulsing require 4 times the turns needed for square wave therefore since we are only varying bmax from zero to max and only applying pulse during on time...

 


« Last Edit: July 18, 2018, 01:52:16 am by sebosfato »

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the drive module
« Reply #114 on: July 23, 2018, 18:40:47 pm »
I´m building a module for the igbt and scr to work in a different case from the pulsing circuit

the idea is that i want to split the hot part from the circuit part...

also will give me more room to organize the circuit (i want to remake it all... )

 here there is going to be two heat sinks from computer cpus... i believe they will do the job well

one is little smaller from a pentium processor( this one is round ) here i put the scr

and other is bigger from a older amd computer and this is square shape and have more space for components.. here i will put the igbt and some diodes... it will also have a 30amp isolation diode at the input but this will sit at another heat sink

all the heat sinks will be floating hold by plastic or teflon spacers to get a isolation of at least 10kv from the box ,.. ideally more than 10kv... this will form a capacitance and is better it to be as smaller as possible.

this is because i dont like to use plastic spacers between the igbt and the heat sink as is more safe to work without burning

i´m using an old cpu desktop lateral as the case

this module will be connected to the transformer directly

so maybe i will left some space for two sensing circuits to interface with the pll just in case (or left for a future mod)






« Last Edit: July 23, 2018, 22:40:24 pm by sebosfato »

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new pll idea
« Reply #115 on: July 28, 2018, 08:38:17 am »
I came up with a theory about the operation of the pll that i may not have thought before...

the circuit i´m designing should get high power discharge on water at high repetition rate

meyer says in the patent that when a resonant condition is achieved the pll will lock in and hold there at that frequency..

the discharge time calculated for my system is around up to 1MHz so if using a 100 times frequency divider is possible to have something around 10khz !

so theres two frequencies one of the water resonance that will be feedback to the divider and than to pin 14 while the other is the applied frequency but taken from the transformer for timing precision...

when resonance happens on water than the pll should lock into it but applying a lower frequency to tune to that,,

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weekend workings
« Reply #116 on: July 30, 2018, 20:23:18 pm »
this weekend i organized my lab installing some shelf to put all my stuff previously sitting over my tables where i should be working.. this may improve my efficiency finding tools and building...

i cant believe how long i survived at this level of mess hahaha

had to spend 100 dollars on organization! hopefully helps me save some time and energy!

a total of 5 shelf and 20 small box to organize! Also i got a 30w Led lamp for the lab to get the dark away!

full power now!

 

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Circuit diagram
« Reply #117 on: August 02, 2018, 00:43:09 am »
I´m working on a pcb for a new pll frequency generator that i´m going to build for the new tests...

i working based on this previous diagram from 2015 but without the frequency mixer...

basically is the same circuit i have here but this one will have less wire around and will be easier to change the connections among the Ics since i´m adding some jumper connections that can be easily exchange with other points in the circuit..

i´m doing this because i want it to be as flexible as possible... easy to change capacitors, resistors...

i was thinking about getting this circuit done professionally but it costs like around 120 reais for each DoubleLayer pcb and the minimum amount is 5... so if its only for me is not viable at all...

i already have the tools to do the pcb here with photografic process so i´m doing that...

https://drive.google.com/open?id=1xh0MPitnFYcU64fkyW67H6mw6mWC3Uqw



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lockin ckt at patent is wrong
« Reply #118 on: August 02, 2018, 07:48:09 am »
hello

i noticed that the lock in ckt is wrong...

when the pll is in lock the signals at comp in and sig in should be exactly in time.. therefore this makes the small capacitor to get charged and make the signal on the led indicating the lock to go low instead of high..

also the signal is not arriving correctly on the norgates

i believe i had came to this conclusion on the past and that my circuit that is working i have changed this..

thats why i want to build another one.. as i dont remember all the things i changed

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Re: Retry N1001
« Reply #119 on: August 02, 2018, 09:35:00 am »
Go Fabio go!

The pll master :)