Bedini SG

[Aaron]

trigger delay

Hi Sephiroth,

Yes. It shortens the pulse width and delays the on time for the transistor.

Magnet N moves towards core and induces a reverse charge to base keeping it off. The moment that the magnet moves away from top dead center, the field flips and then there is positive at the base that turns on the transistor, which of course allows the power winding to charge from the battery.

Having the inductor I would imagine slows the time BOTH (just guessing at this point) for the reverse voltage to hit the trigger (keeping it off) and after magnet moves away from TDC it delays the positive that is necessary to turn the transistor on.

So for example in John Bedini's examples of the power turning on at 23 degrees (on 8 pole example I think), it might turn it on at 25 degrees for example. If it turns on later in the rotation that is the delay.

If it is delayed then that means the north field of the next approaching magnet will start to induce a field in the coil quicker than normal...in relation to when it was turned on to begin with...meaning that starting later and cutting off sooner will cause it to have a shorter pulse width...shorter pulse width is less current used.

[ren]

Yes Aaron!

The pot varies how long it takes for the trigger pulse to fire I think. This means that as you vary the resistance upwards it fires further away from the north that has just passed. It eventually gets to a stage where the scalar south switches it off microseconds later. The coil is firing well after the north now and is attracting the scalar south more than repelling the north. Any further increase will only raise amp draw and reduce speed from here as this is the optimal tuning spot.

I think this relay may be effecting the pulse width which is different to when it fires. Lets say your transistor needs 1 volt to the base for it to trigger. If the passing magnet induces 1 volt or over for 2 seconds then the transistor will fire for 2 seconds. I think the relay may be choking the amount of time the trigger coil sends the 1 volt pulse lets say for 1 second now. You now have a faster on/off time, effectively changing your pulse width. This could also be done with a thinner/weaker magnet. My 2 cents, could be wrong. There is a good read on affecting pulse width here http://www.totallyamped.net/adams/ on page 9.

I am also assuming that the relay coil has a core too? Maybe that adds another dynamic, maybe not. Sep I am guessing the gauge of the wire in the relay is quite fine yeah? This is important too I think. You could vary and experiment by simply winding another tiny coil with finer gauge and use it the same way as the relay is being used here. I wondered if the direction of winding would alter things too Aaron....

What a way to kick start the Bedini thread. Keep it up guys!

[Aaron]

relay specs

Hi Ren,

Sephiroth posted that the relay coil has a steel looking core of 4mm diameter and 10mm diameter coil. Wire gauge looks like horse hair. What do you think, maybe 30 gauge?

Someone else was asking me about the turn direction of the coil in relation to the trigger.

[ren]

Oops missed that one Aaron! Ok so its super fine, you're right probably 30 gauge or even finer. From memory he said its about 67 ohms?

Does your relay click every time it fires Sep? Im trying to figure a way in which the relay could be further exploited. I was wondering if the NO (normally open) contacts of the relay could be utilized by wiring the power winding through it. I was thinking that the sg's coil could be physically disconnected at all times until the relay is triggered to fire. The triggering would close the contacts on the relay completing the power winding circuit at the same time choking the trigger circuit. Maybe that wont work or wont change anything, just thinking out loud. This could make back popping easier to acomplish if it did work because the circuit is disconnected at all times until it fires.

This relay coil changes the 1 to 1 make up that is common throughout most of JB's designs. I would be interested to see a comparison made with a coil wound 1 to 1 but with a 30+ gauge as the trigger, much like the Bedini/Cole half circuit calls for a much finer gauge on the trigger in the window configuration.

[Sephiroth]

Ren - I was trying to do somehting very similar with the relay but no, it doesn't trigger it... with hindsight, I should probably have hooked the trigger and relay together with a bridge recifier...

the core of the coil is a soft steel

I have just tested the speed and amps with the coil hooked both ways and the performance is identical so direction of the windings doesn't seem to be significant...

[ren]

ok interesting.... So theres not enough of a magnetic field to activate the relay, or its switching too fast for the contacts to close.

Keep testing away, I think the diode bridge would complicate things on the trigger circuit however.

I have nearly finished the basic construction for my next round of tests. I have a 23 inch wheel with a fixed shaft so timing pulleys etc can be employed. Post some pics soon

[Aaron]

choke on trigger vid?

Hey Sephiroth,

Are you going to put up a youtube vid with a demo of the choke on the trigger comparison before and after? Probably would get some good feedback from others.

[peper10]

Hi everyone!!!!!!

I invite you to look at Youtube to see an interesting
setup based on ktservices.
http://ca.youtube.com/watch?v=qEfGnAif3ik&feature=user
He need some advices for improuve is desing.
I'm not so qualified because i just start to understand the basics.
But i'm sure guys like:sephiroth,ren,theremart,and other can take
a quick look and come with solutions!!!!

peper10

[peper10]

Thinking!!!!

I guys!!!
IF anyone ad a look at is setup,could it be possible that:with the 2 outside
coils he can pulse is voltage back in is primary battery directly from is
rectifier????
I'm not pretty sure,because someone said that:[U]You can't charge a
battery when you take power from it.[U]
And at the same time there anoter guy (ultimate bedini)on youtube who's
doing that?????
Can somebody bring me lighton that??
Thanks

peper10

[Aaron]

no video

The video link you posted says the video was removed.

[peper10]

Look for....

It still work for me?????
In the search box tipe(bedini circuit diagram)..
the guy nickname is:PWORDCHERNOIR.
Thanks

peper10

[Sephiroth]

Hey Sephiroth,

Are you going to put up a youtube vid with a demo of the choke on the trigger comparison before and after? Probably would get some good feedback from others.

Uploading a vid now... it should be on my channel in the next hour or two...

YouTube - introvertebrate's Channel

though I couldn't get as good as demonstration as I hoped for... using a different magnet configuration to my original tests but you can see the obvious difference in amp draw compared to rpm which is the main thing

really find it hard to believe no one else has posted positive results... I noticed Lee didn't mention his rpm.

Has anybody tried this yet?

[Aaron]

youtube video?

Hi Sephiroth, I still don't see it up and its been quite a few hours.
Do you have a direct link to it?

Thanks!

[Sephiroth]

sorry.... went to bed while it was uploading and there was an error.... uploading again now.

[Sephiroth]

YouTube - Benificial Modification of the Bedini SSG?