Bedini SG

[theremart]

Wrapping of the coils.

hey ren.

I've tried a seperate trigger coil but didn't have great results...

the obvious difference with a seperate trigger coil is that it will only ever produce one pulse... which is fine.

but bedini must have a reason for wrapping the power and the trigger together. my thought is that the power coil cuts off the trigger as it turns on so it can produce sharper spikes, but that is just speculation.

though since mine doesn't work as well on single spikes, that is probably why i didn't have good results. as you say aaron had escellent results with his tape reel motor... from what I have seen so far he has had the lowest amp draw compared to rpm.

-----------------------------------------

A friend of mine suggested to wrap the power coil on the coil, then the trigger coil on top of that ( not at the same time )

I might get around to trying this, as it would put the power coil closer to creating the magnetic field of the core.

Just another thought.

[Sephiroth]

hey ren.

I've tried a seperate trigger coil but didn't have great results...

the obvious difference with a seperate trigger coil is that it will only ever produce one pulse... which is fine.

but bedini must have a reason for wrapping the power and the trigger together. my thought is that the power coil cuts off the trigger as it turns on so it can produce sharper spikes, but that is just speculation.

though since mine doesn't work as well on single spikes, that is probably why i didn't have good results. as you say aaron had escellent results with his tape reel motor... from what I have seen so far he has had the lowest amp draw compared to rpm.

[ren]

the steel against the core of a trigger coil will vary the inductance of the trigger circuit. Heres a good page on induction given to me by a friend Magnetic fields and inductance : INDUCTORS

Think about the magnetic field that is encompassing the coil when it fires.

I imagine it will have a similar effect to the relay in the trigger circuit but it could also effect the nature of the power windings as these two are inductively related. Ive said it before but I think I will just go ahead and try and build it and back up what I say hey? A separate trigger coil would make for the finest tuning capability possible I feel. Look at Aarons tape motor, it has two trigger coils wound in series and they are separate from the power coils.

By the way some new pics of my recent developments. The circuit while looking ugly works really well. Amp draw is variable from 200ma up to 1.2 amps. Timing wheel is yet to be completed.

[Sephiroth]

"Sephiroth slaps himself on the head"

DOH! I just realised!!! with a six magnet configuration the pulse range musn't be over 30 degrees or it will start to repel the next magnet!!!!

Revelation: The reason I am getting improved rpm for amp draw is that without the choke my set up is putting drag on the rotor by repeling the incoming magnet for 5 degrees! wasted amp draw!!!

but with the choke it sits perfectly within the 30 degree range! no amps wasted! No drag on the rotor! Eureka!

wait a minute... it shouldn't even be able to pulse after the 30 degree mark! the incoming magnet should turn off the transistor at 30 degrees!

is it possible the switching time on the 2n3055 isn't fast enough and is causing the elongated pulses?

Perhaps my measurements are wrong... I'll double check.

[gmeat]

Hey Seph,

I'm getting that result without the choke on the trigger and i'm going to try the choke now to see what happens with both combos.I found a weird affect when I played with the steel behind the core that sped up the motor in my first post where I said it would speed up with more amperage also well,I said to myself what the heck why not see what happens with very little resistance and the amp draw went to 1.3 amps ouch! things started getting Hot but when I put the steel plate behind core the motor sped up more but NOW the amps dropped back to about 1 amp.I dont know what to make of this.Thx for sharing


-Gary

[Sephiroth]

"Sephiroth slaps himself on the head"

DOH! I just realised!!! with a six magnet configuration the pulse range musn't be over 30 degrees or it will start to repel the next magnet!!!!

Revelation: The reason I am getting improved rpm for amp draw is that without the choke my set up is putting drag on the rotor by repeling the incoming magnet for 5 degrees! wasted amp draw!!!

but with the choke it sits perfectly within the 30 degree range! no amps wasted! No drag on the rotor! Eureka!

[Sephiroth]

Hi Sep,

I'm not sure but my particular setup gives me 2 different readings on each coil.At 260 milliamps I get 340 hertz on one coil but on the trigger coil I get 170 hertz.I use 18 guage wire on both coils but on the trigger coil i twisted and the other is wound normal.I'm sure this is probably the cause of it.On a side note with my paticular setup I found a strange affect that I get when I hold a piece of steel that I had laying around which is about 1.5"w by 2"L by 3/8 thick that if I put behind my front coil the motor speeds up with more amperage being drawn but if I put it behind the other coil the amperage lowers but I cant really notice any affect on speed.Can you or maybe another member verify this as I dont have a tach meter.thx and keep up the goood work



-Gary

Gary, Thanks for that! just read your post after the post I made earlier and it looks like your setup is double pulsing as well!

Not sure what is causing the effect you noticed... I'll have a play around and see if anything happens

[Sephiroth]

Hi Guys,

following Lee's experiment with the trigger choke under the strobe I have done a few tests which have revealed a few things about my motor.

The main thing is it's sweet spot is double pulsing. If I tune it so that is pulses once per magnet it shoots up to about 4500 rpm but draws around 750ma so it isn't as efficient a sweet spot.

Here is a strobe shot of the pulses with the choke in the circuit on the left and without the choke on the right

strobe.jpg

So with the choke i am getting two solid and very brief pulses with a delay equal to the length of the pulse in between. the pulses are roughly between 9 and 28 degrees so the total pulse is for 19 degrees of rotation.

without the choke there are two long pulses with a brief delay in between. The pulses occur roughly between 1 and 35 degrees so the total pulse range is for 34 degrees of rotation.

[gmeat]

I'm curious about the frequency other peoples ssgs are pulsing at compared to the amp draw and what the correlation between that and the charging effect is... but any (and, yes, ALL) comparitive results would be really handy!

Hi Sep,

I'm not sure but my particular setup gives me 2 different readings on each coil.At 260 milliamps I get 340 hertz on one coil but on the trigger coil I get 170 hertz.I use 18 guage wire on both coils but on the trigger coil i twisted and the other is wound normal.I'm sure this is probably the cause of it.On a side note with my paticular setup I found a strange affect that I get when I hold a piece of steel that I had laying around which is about 1.5"w by 2"L by 3/8 thick that if I put behind my front coil the motor speeds up with more amperage being drawn but if I put it behind the other coil the amperage lowers but I cant really notice any affect on speed.Can you or maybe another member verify this as I dont have a tach meter.thx and keep up the goood work



-Gary

[Sephiroth]

They have some great data there. What type of data are you looking for?

( if you are like me you want it all he he )

I'm curious about the frequency other peoples ssgs are pulsing at compared to the amp draw and what the correlation between that and the charging effect is... but any (and, yes, ALL) comparitive results would be really handy!

[theremart]

RE: battery charging time.

Hello,

How long is it recommended to charge a battery for the first time with the SSG Charger?

There is a thread here that talks about charging times with the SSG.

If this is not a new battery, I recommend you check the fluid levels of the battery before you go much further to be sure you do not create excess HHO gas. But, I normally check the voltage of the battery, and I just leave it on till it reaches 13.5 - 15 V. This may take days, or may not happen at all if the batteries are in poor condition. The ssg cannot fix physical problems ( broken plates, or damage from overheating ) but, it does have a history of doing great recovery of batteries.

[theinventor]

Battery Charging

Hello,

How long is it recommended to charge a battery for the first time with the SSG Charger?

[jimmydean]

Great .pdf Aaron. Thanks for making this available!

[jimmydean]

I'll try another transistor then as well as new resistors. Thanks Jetjis.

[theremart]

RE: data from the groups

theres a bedini sg group that i applied to joi last week but have not been activated yet (no word from them at all)... perhaps that is it... apparently it had a database of spec and performance of many people's ssgs that I thought would be really interesting. If that is the group does anyone have a copy of the database?

They have some great data there. What type of data are you looking for?

( if you are like me you want it all he he )