nali2001

i was going through the transformer core material
the findings are as follows

CRGO ( cold roll grain oriented core) =  1.2tesla
CRNGO                                        = 1.0 tesla

ferrite                                         = 0.3 tesla

the C core you are using is compatible to the ferrite core and can handle 0.3 tesla in other words can handle 3000 Gauss

the use of CRGO in micro wave is due to the requirement of high voltage and high current at 50 HZ and that is possible only when the B(sat) value is high enough that is 1.3 Tesla ( or 13000 gauss)

steep rise in value of B in BH curve causes steep fall as well
my analysis
modulated frequency can play strange role in power transformation.
 

Hi Winsonali,
''C cores" is just a shape term and it does not define material used.
The C cores from my videos are M4 material and are about 1.35T at 50hz.
So they are not like ferrite, and are only intended for 50 > 400 hz

For some of my other tests I use custom cores made by http://www.mkmagnetics.com
The material is FinemetFT3.
http://www.hitachi-metals.co.jp/e/prod/prod02/pdf/hl-fm10-d.pdf
It is  considered to be the worlds best material right now, it easily surpasses Metglas materials. One core was about 850 dollar.
It offers supper low losses, relatively high T at very high frequency and dead square Bh loop.
http://www.mkmagnetics.com/dataSheets/pdf/coreSpec.pdf

 nali2001
 a normal core material saturates in 10 ms its so there is no need to waste power by continuously powering it for 20 ms
this can alone save quite good energy in transformers
this can be represented as flywheel effect in mechanical
how we can describe the same effect when we are generating energy.
   
 

nali2001

have seen many great project go down on this forum due to bombardments of unreasonable comments and requests from armchair minded folks. If you ever get such comments, don't get frustrated and angry. Some folks are more searching for reasons why things can't work, than reasons how to make it work and why. Keep working at your goal and reach the results you seek for.

thank you for your advice .. i have made my life through hard times and i know how to meet the targets if my device is successful it  will make its own way..

comming to point of transformer

1) Ohm's law is not true representation of voltage and current relationship in any transformer higher the voltage lower the current.
current is the mass element of power where as voltage is its speed and frequency is its tendency to fly

consider a car it can run but cannot fly if you want to make it fly you have to run faster and with different reference against air not  ground like wise if you want charges to fly you need frequency and antenna.

any way i will send you a program i have made to calculate the fix gauss system and there number of turns.

when we do switching with square wave through DC the most successful way is to reduce the duty cycle so area under the curve should be equal and in this way the flux in core will go back to its neutral value naturally and in this way you will not waste power in returning the status

can you send me some information about how to calculate the Number of turns of transformer based on current equation not on voltage equation.

r u working on making an MEG or just experimenting for fun.

Hi winsonali
Uhm which pulse wave video?
Which video name did you mean exactly?

Hi Winsonali,
Sorry I do not have formulation to properly design a transformer.

You wrote:
"when we do switching with square wave through DC the most successful way is to reduce the duty cycle so area under the curve should be equal and in this way the flux in core will go back to its neutral value naturally and in this way you will not waste power in returning the status"

This is going to be very hard to explain through written words but I will take my time and describe a few things. Getting a core to go back to neutral polarity in a loaded situation is by fas not as easy as one thinks. I have done some tests years back on Dc transformers. It sounds simple, putting a Dc square wave into a transformer and pick up good power at 50hz. I tell you take your regular transformer approach like http://home.planet.nl/~sintt000/Circuit001.jpg and I can assure you it does perform horribly.

Why you ask? Well it is because the core can not relax back to a zero magnetic polarity in between the dc pulses. I have told and shown in the Core tests video's that only certain type of cores resets them selfs back to a zero polarity state even when they are close looped. So even if you have the good core type you will not be able to made a good dc transformer out of it with the above circuit. And it is because the core is not allowed to "rest" or reset itself due to 2 components. One being the inductive collapse (or back emf as some wrongfully call it) protection diode on the input coil. And the second is the output coil itself.

You have seen in the Core test video's that closing the secondary coil makes the cores magnetically clamp together for a while. The magnetism in the core wants to dissipate and it is being resisted by the closed output coil. Meaning that any RESISTANCE attached to either the input or output coil will hinder the speed at which the core wants to reset itself to a neutral magnetic state. And the protection diode on the input coil acts as a blockade for the field reset or depletion of the inductive collapse.
So you say, well just remove the diode like: http://home.planet.nl/~sintt000/Circuit002.jpg and it will work right? Well two things, yes the primary coil is now indeed open and will not restrict the resetting of the core. But the absence of the diode puts the fet at risk from possibly harmful inductive spikes. But if these spikes are not too extreme the fet should survive.

But even with this diode removed the systems will still not work well. And this is because there still is one factor present hindering the core reset after each dc input. And that is the output coil and load itself. A load (a bulb for example) on a output coil is in essence just a resistive short on the output side. And in the core test video you say what happens when a coil is left closed. It will hold the cores together. The field can not escape fast enough and so it can not reset or go back to neutral. Meaning the core will always hold a high degree of residual magnetism. And is because of that in a dc mode not able to produce a big field change. In ac the field change is force since the input is alternating in polarity and will force a flip flopping field change.

Here is what will happen if you don't do it right:
http://home.planet.nl/~sintt000/ClampCore.wmv
In the video I input a dc square wave in a proper core. In the first test you see the core without an inductive spike protection diode. The core behaves "pure" meaning that it "attracts and lets go". In the second half of the video you see what happens when you do put the protection diode in place, and capture some of that flyback / inductive collapse. You see that the core behavior has totally changed and the two core parts are like welded together... Very strong remnant attractive force is present in the core. This remnant field is the result of the blocking factor of the flyback protection diode. The coil is never "open" and hinders the core reset.

The solution to the dc transformer situation is this:
http://home.planet.nl/~sintt000/Circuit003.jpg

If you know what is happening in the core and all the component you can do good things in dc. But there are some rules to follow. Hope you people found this all of any use.

Here is the dc transformer:
http://home.planet.nl/~sintt000/DCtransformer.wmv

The electrical world is not all that well understood. It is like fire, we all know how to make it and work with it as a known component, but only few know what makes it tick.
Same with transformers. I mean... again, how can the secondary of a transformer interact with the field IN the core...? It does not come in contact with the coil at all and still it generates a good output.

http://www.youtube.com/watch?v=XsrbaCJo3Qw&NR=1
Eric Dollard (the bearded guy) is in my opinion the best skilled electrical engineer I ever came across. A true old style Tesla expert. Too bad he is so low key.
See all 6 video's http://www.youtube.com/watch?v=YhuSn6sc7sc

And these two:
http://video.google.nl/videoplay?docid=-6461713170757457294&ei=KgAkS-bSAouW-AbP7vXuDw&q=Longitudinal+tesla#

http://video.google.nl/videoplay?docid=-721789270445596549&ei=KgAkS-bSAouW-AbP7vXuDw&q=Longitudinal+tesla#

...
The solution to the dc transformer situation is this:
http://home.planet.nl/~sintt000/Circuit003.jpg

If you know what is happening in the core and all the component you can do good things in dc. But there are some rules to follow. Hope you people found this all of any use.

Here is the dc transformer:
http://home.planet.nl/~sintt000/DCtransformer.wmv

Hi Steven,

Excellent post, thank you very much for sharing your "DC transformer" circuit, very clever solution.

Keep up your good work!

rgds, Gyula

this is the simple circuit to charge your same battery/ capacitor with back emf pulses