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Author Topic: Bedini replication in Germany  (Read 96213 times)

zott

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Re: Bedini replication in Germany
« Reply #60 on: March 05, 2008, 06:40:55 AM »
  I recon my posting on anothers thread  was not as big a problem as I had figured   :)  I will try  to fill some of the holes I left in the thread.
« Last Edit: March 16, 2008, 11:17:11 PM by zott »

zott

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Re: Bedini replication in Germany
« Reply #61 on: March 05, 2008, 06:58:18 AM »
 was having troubles getting up to speed without blowing transistors bd243c's . any ideas ?
« Last Edit: March 15, 2008, 04:09:35 AM by zott »

Ren

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Re: Bedini replication in Germany
« Reply #62 on: March 05, 2008, 08:15:41 AM »
Rick the best way to set up your machine would be with a single trigger firing all coils at once. You can link up all three triggers in series to do this but one should be enough. Try having a switch for each power winding that way you can test every one and run on lower currents too. The best way to wire up your circuit is to have all connections as short as possible, join the coils directly to the transistors. Ideally you should bunch your transistors next to your coils. Have all output diodes go to a buss bar, it could be circular around your machine, and then THICK cable for minimal losses to the + of the charge battery. Same thing goes for all the negative legs in the circuit. Same size buss bar for all the emmiter connections. There are lots of little tricks that can improve performance, have a look at JB's work on his multi coilers and note the layout.

I think you may be better off moving up to a bigger transistor too..... the bd's will suffice for now.


Rotational wise it needs to be smooth and little friction. A hard drive bearing wont spin for long by hand but it will do incredible speeds. Experiment with a different style bearing if you like.

Keep it up

zott

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Re: Bedini replication in Germany
« Reply #63 on: March 06, 2008, 02:39:35 AM »
 Thank you kindly  Ren for  the input . I yanked the bearings  and split them open to clean the grease out and put a couple drops of sewing machine oil in them .  they now spin a lot easier  and am looking at cutting back  the length of the coil wires
« Last Edit: March 15, 2008, 04:24:01 AM by zott »

Ren

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Re: Bedini replication in Germany
« Reply #64 on: March 06, 2008, 07:39:44 AM »
Yup you're onto it mate! You can use copper strip and also copper pipe for buss bars. It looks like you may have done that already. While I like the circuit boards Albert has sourced/made I have heard varying responses from people who have tried it that way. They do look very professional though!

Yes the switch simply breaks the positive terminal from the power winding. I cant remember exactly  where the page is with the pics, it might look something like this. Ill keep looking.

zott

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Re: Bedini replication in Germany
« Reply #65 on: March 08, 2008, 01:38:40 AM »
 Last night after  putting switches on the pos drive buss  ,and cutting and moving other things I decided to  give the transistors 24 vdc and  pull all the resistance  and current buffers  and watch the scrawny bd 243c's pop one at a time  kinda like popcorn  I new what  would happen if I did that but I needed some action  after all the wiring and solder smoke.   for  now I'm in the  need for some captain morgan spiced rum ... need rum
« Last Edit: March 15, 2008, 04:43:37 AM by zott »

Ren

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Re: Bedini replication in Germany
« Reply #66 on: March 08, 2008, 03:27:20 AM »
lol, dropped a 24v nuke for some little puffs of smoke hey ??? ;D

I know how you feel, it can be frustrating getting a multi coiler to  run smooth.

Your diagram looks good from what I can tell. What did you change from the circuit that was working? Anything besides the busses and on/off switches?

Unfortunately I can only offer some suggestions to check your circuit out.

First things first, get it running off one coil only. One transistor only too if possible. This is where a switch for EACH power winding can come in handy as it will allow you to fire one coil, one winding minimum. 12 awg is pretty thick stuff, you'll probably find that you will need very little resistance on the trigger probably in the 50 ohm to 150 ohm, maybe less. Make sure they are over 1 watt rated preferably 2 watt with wire that size. Once you have one winding firing on one coil start adding other transistors to the other windings testing each one as you go. I would definately be using the 2N3055 for this circuit, even better the mlj21194 although these are about $10 bucks a pop so maybe not just yet.

Make sure the collectors of all transistors are isolated from each other. Remember the metal backing of the transistor is part of the collector too, so you cant mount them all on something conductive. Also each base of each transistor should have the same resistance and your pot/small globe should be your only adjustment on your master coil. Sometimes it helps to just clip everything together first, check to see it works well then solder everything one at a time. Much less dissapointment too.

Keep going mate, the rum will help for now, just get one coil up and running first with the right resistance and go from there.

Good luck!

zott

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Re: Bedini replication in Germany
« Reply #67 on: March 08, 2008, 04:46:11 AM »
 Well after the  smoke show I decided  to re transistor up to a set of  NTE 331 npn.s   , these are 15 amp   and some tougher  well  I  also remounted everything on a thicker board  and strung a new set of buss lines in a circle around the  outside of the coils ... hmmm 
« Last Edit: March 15, 2008, 04:49:10 AM by zott »

zott

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Re: Bedini replication in Germany
« Reply #68 on: March 08, 2008, 08:10:14 AM »
 Ren sorry about the mistype  but  should have  typed the wire size I used in the coils was 19 awg  not 12 , and I have mica backs on the  new transistors I installed (nte 331's)  and the collectors are isolated to each transistor  except the driver battery does connect them with the pos  terminal  through the coils.  and the resistance on the trigger line is 4 100 ohm resistors 2  parralelled with 2 in series ,then through a 1 watt  12volt neon bulb   finally through a 50 ohm wire wound var-resistor.. after all this  I spun "ER" up  and   Gadzooks  it took off like a hyper foibling warble warp   . It used to  just spin at a countable rotation  " how lovely" but useless . now it is spinning at a speed that has me ducking and hiding behind my arms when I go near it to adjust and measure  . It's about time. it only took 6 months
« Last Edit: March 15, 2008, 05:05:18 AM by zott »

zott

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Re: Bedini replication in Germany
« Reply #69 on: March 08, 2008, 08:56:11 PM »
 after all the hand filing to cut the magnet slots and  drilling out the center hole then gluing the 2 magnets into the slot using automotive goop  the magnets seem to be holding tight and there is only a couple of harmonic shudders on it's way to hyper speed  then it spins perfectly and quietly I am still using more power to spin the rotor than I can pull uot of the charge circuit , but it does charge 
« Last Edit: March 15, 2008, 05:14:45 AM by zott »

zott

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Re: Bedini replication in Germany
« Reply #70 on: March 08, 2008, 09:01:44 PM »
  I am using a  good simpson true rms meter and it shows  I  am drawing 1.7 amps  at full speed  and  barely get over 1 amp out with  the full resistance at the trigger circuit   . If I drop the 200 Ohm  resistance and only use the 50 ohm  var-resistor I can pull 3.7 amps  to charge batteries with . but  you know the extra  costs   at the drive battery   because I have more rpm's   and  the coils are drawing  4.5 amps .  . so no cigar yet.   I have a couple  ideas  rattling around my noggin  and I have a few 12 hour night shifts to  figure them in.   I have a couple of scopes but have to figure out what I should look for and where . . I think the juice I want shows up just after the transistor closes and the hot power falls off   If the closing fall time is where th cold power sneaks in   I should figure uot how to capture that moment.  does anyone know which scope would be better to do this I have a tektronix 100 mhz ,analogue or a lecroy 400 mhz  digital  to use  and what type of probe ?  I just don't get much time on these machines.
« Last Edit: March 15, 2008, 05:33:39 AM by zott »

Ren

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Re: Bedini replication in Germany
« Reply #71 on: March 08, 2008, 11:10:54 PM »
wicked! ;D Good work. Glad you got it crankin. What is amp draw at running speed?

zott

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Re: Bedini replication in Germany
« Reply #72 on: March 09, 2008, 02:59:26 AM »
I really don't know what this is showing yet if anything but OOH ,aah  I will get back to testing and modifying after I go earn some scratch for a few dayz >>zott<<<
« Last Edit: March 15, 2008, 05:38:22 AM by zott »

Ren

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Re: Bedini replication in Germany
« Reply #73 on: March 10, 2008, 12:48:01 AM »
hey zott what happened to all your posts ???

bourne

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Re: Bedini replication in Germany
« Reply #74 on: March 10, 2008, 01:01:47 AM »
That is so disheartening zott
It really makes me sad