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Author Topic: Pulse Generator  (Read 33096 times)

slayer007

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Re: Pulse Generator
« Reply #30 on: November 02, 2008, 05:50:01 PM »
Here is a video showing the amp intake and voltage on the compasitor after load.
The load was from 110v nightlight.
http://www.youtube.com/watch?v=D4wFqJG_q5c

slayer007

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Re: Pulse Generator
« Reply #31 on: November 04, 2008, 04:09:38 AM »
Lidmotor made a video showing the generator running with a adjustable voltage regulator.
http://ca.youtube.com/watch?v=KwqMDBrF9wM

Kator01

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Re: Pulse Generator
« Reply #32 on: November 04, 2008, 09:20:24 PM »
Hi slayer007,

I would like to know if there is any voltage at the secondary-high-voltage-coil  of your ignition-coil ?
If there is no significant output-voltage then a test would be to remove the diode between collector and L1 and find out if there is a difference in the output to your cap ( charging-time, voltage reached )

I may be wrong but it seems to me that his diode does not make any sense as the negative kickback-emf from L2 takes the shortest path to diode which leads to the negative lead of the cap at the bridge as this is the low - impedance path while L1 means high impedance. I do not think that there is any current flowing through L1.


Regards

Kator


slayer007

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Re: Pulse Generator
« Reply #33 on: November 07, 2008, 12:55:33 AM »
Hi slayer007,

I would like to know if there is any voltage at the secondary-high-voltage-coil  of your ignition-coil ?
If there is no significant output-voltage then a test would be to remove the diode between collector and L1 and find out if there is a difference in the output to your cap ( charging-time, voltage reached )

I may be wrong but it seems to me that his diode does not make any sense as the negative kickback-emf from L2 takes the shortest path to diode which leads to the negative lead of the cap at the bridge as this is the low - impedance path while L1 means high impedance. I do not think that there is any current flowing through L1.


Regards

Kator


yes there is significant output voltage at the ignition coil.
If you remove the diode from the collector you get more voltage to the ignition coil.
And you'll get more voltage to but it will cost more amp input.
This way I was using the back emf from the first coil to go thru the second.

Kator01

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Re: Pulse Generator
« Reply #34 on: November 07, 2008, 02:27:38 AM »
Hey slayer007,

now the diode leads the back-current in a circle ( it seems ) through L2 again thus recycling that part of the energy via L3 directly to the bridge - so you could do without the ignistion-coil. This must give you more power back to the bridge. I think the power is divided up in L1 and L2. if you draw on the seconday of the ignition-coil you will loose more at the expense of L2-L3 to the bridge.

Have you compared exactly the power ( not the amperage ) of these two types of circuit ( with and without ignition-coil ) ?

Another point here is : the more diodes you use the more heat-dissipation you will get. Even if on uses very fast-switching flyback-diodes like UF 5408 you will have 3 volt forward-current voltage-drop which means heat-losses.Use ony the least  necessary amount of diodes.

Regards

Kator01

slayer007

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Re: Pulse Generator
« Reply #35 on: November 07, 2008, 07:00:09 PM »
Here's a video using a different coil setup.
It uses more power but it puts out a lot.
The circuits basically the same.
But I have a transistor running one side and the other transistors running the other side.
Then there both hooked up to the same reedswitch.
The the third coil on the outside is going to a rectifier.

In the video the amps going out are only from the third coil.

http://ca.youtube.com/watch?v=FTXCV0BGxZg

helmut

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Re: Pulse Generator
« Reply #36 on: November 07, 2008, 07:29:26 PM »
Here's a video using a different coil setup.
It uses more power but it puts out a lot.
The circuits basically the same.
But I have a transistor running one side and the other transistors running the other side.
Then there both hooked up to the same reedswitch.
The the third coil on the outside is going to a rectifier.

In the video the amps going out are only from the third coil.

http://ca.youtube.com/watch?v=FTXCV0BGxZg

@Slayer007
Thanks for sharing
Very impressing work
helmut

Groundloop

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Re: Pulse Generator
« Reply #37 on: November 16, 2008, 11:56:46 PM »
@All,

I have built a version of the magnetic flux switcher. No time to test it yet, but the oscillator
runs and the flux is "fluxing".  ;D

I have added one more small coil. This coils gets the back emf voltage from the switch coil.
The idea was to disturb the permanent magnetic flux in the left core loop. I will test this circuit
much more and will be back with results later. Small steps.....

Groundloop.

helmut

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Re: Pulse Generator
« Reply #38 on: November 17, 2008, 12:28:08 AM »
Hi Groundloop
Good work and very nice sketch.
Cant wait your results.

helmut

slayer007

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Re: Pulse Generator
« Reply #39 on: November 17, 2008, 02:12:22 PM »
Very Nice Groundloop

Please let us know how your results go.

Groundloop

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Re: Pulse Generator
« Reply #40 on: November 17, 2008, 07:24:15 PM »
@slayer007, Helmut,

I did some testing today and found that my output coil is not big enough.
I got only 3,4 Volt output when the input was 9 Volt. The output must
be at least 15 Volt, so I have to make the L3 coil approx. 4 times as big.
More work and testing is needed......

Groundloop.

Groundloop

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Re: Pulse Generator
« Reply #41 on: November 18, 2008, 09:44:21 PM »
@All,

Did a lot of testing today. First I tested how much energy there was available on the back emf voltage output.
When I ran the unit at 20 V and 2 A then I got approx. 20 Watt out of the diode. Later I made a new coil L4.
With 100 turns I got some modulating of the magnet field and the output did get up to the double. Still, the
output was WAY to low to be of any value. So I can say that it IS possible to switch a dynamic flux field
with this setup, but you can NOT switch a static flux field without big losses. End of story.

But it was a very nice drawing, was it not? :-)

Groundloop.

gyulasun

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Re: Pulse Generator
« Reply #42 on: November 19, 2008, 12:14:04 AM »
@All,

Did a lot of testing today. First I tested how much energy there was available on the back emf voltage output.
When I ran the unit at 20 V and 2 A then I got approx. 20 Watt out of the diode. Later I made a new coil L4.
With 100 turns I got some modulating of the magnet field and the output did get up to the double. Still, the
output was WAY to low to be of any value. So I can say that it IS possible to switch a dynamic flux field
with this setup, but you can NOT switch a static flux field without big losses. End of story.

But it was a very nice drawing, was it not? :-)

Groundloop.

Hi Groundloop,

Thank you for sharing your measurements. 

Would like to ask when you say I tested how much energy there was available on the back emf voltage output  then you meant the output from L4, right?  If yes, then how much power came via the diode bridge (i.e. from L3) at the same time? 

Also I wonder how strongly the input power draw reacted the load placed across the diode bridge output? ( I mean if you loaded the output twice as heavy then the input draw also doubled more or less.)

May I suggest the following (if you agree):  Try to shunt out the flux of the embedded permanent magnet from the core by placing one or more similar magnets (either with the same length or slightly longer than the embedded one) in parallel with and very close to the embedded magnet in attract mode, this way you could regulate the amount of the flux of the embedded magnet, which normally closing through the core.  And see how the total output depends on the static flux's strength (i.e. introducing weak, moderate and strong permanent static field into the core).

Regards,  Gyula

Groundloop

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Re: Pulse Generator
« Reply #43 on: November 19, 2008, 07:33:59 AM »
@gyulasun,

No, the bemf voltage output was measured at the BY255 on the collector of the transistor and to the plus rail.
(L4 is a input coil. I use the back emf energy to drive the L4 coil so we get a pulsating magnetic field in the fixed magnetic field.)

I got very little power from the output coil L3 because I made that coil too small. I must make a new better coil for L3.

I DID noticed that when I shorted the L3 coil when the unit was running, then I did NOT get and increase in input power usage.

I will try out your test this afternoon. Will be back.............

Groundloop.

Paul-R

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Re: Pulse Generator
« Reply #44 on: November 19, 2008, 02:37:53 PM »
i can log in  but can't view picture...

wiz
Yes. I have endless trouble with energeticforum. I reckon they are a waste of space.
Paul