My First Ever Bedini Motor Build

[PastorGordon]

Yay, I finally got my parts in!!! I am in the building phase now... So far this is all I have, but Im going to need more magnet wire! lol, this first coil I've ever built and it may not have enough windings on it.

Measuring the ohms on this coil I get the following readings...
1.6 ohm on my 20 gauge Start Run (big wire) and
4.0 ohms on my 24 gauge Trigger (small wire).
I used steel, re-bar tie wire for the core material (from the concrete section at the hardware store)... And I used a standard terminal strip for the connections...

The rotor is a simple backside drive pulley for a lawn mower... I cleaned out all the grease with carburetor cleaner, and used my air compressor to blow it all out real good. I then used a few drops of oil made for my electric razor to lubricate the bearings just a little. It spins very easily!!!
I super-glued 4 neodymium magnets, spaced evenly apart onto the pulley, and then wrapped electrical tape around it very tightly... Hopefully the magnets will not fly off! I think I got them on there pretty good though.

Here's the pics of what I have so far...









All constructive comments are welcome... please keep in mind that this is my very first time, and Im bound to make mistakes

[Aaron]

neos vs ceramics

Bedini warns not to use neos because they're too strong for the circuit. Ceramics are better if it is efficiency you're after.

[PastorGordon]

Bedini warns not to use neos because they're too strong for the circuit. Ceramics are better if it is efficiency you're after.

Yes, I have read that... however, I saw This video and really liked it... It looks like he used neodymium in his design...

[VIDEO]https://www.youtube.com/watch?v=xIDDSRJ_w8M&feature=youtu.be[/VIDEO]

If I can get a rotor to spin like that I'm sure I could achieve some good "work" out of it... If all else fails, the way I'm building this box, I can always switch out the pulley with another one using ceramics. But I figured why not go neo first

[Aaron]

trigger by induction

Yes, I have read that... however, I saw This video and really liked it... It looks like he used neodymium in his design...

It is a different circuit. With the basic SG type circuit, your trigger winding is on the same coil and is triggered by the magnet and with neos, what is being induced into that coil is way overkill and takes away from circuit efficiency.

If the trigger is being triggered by a magnet moving over a coil, which is not what is happening in that video as far as I know, the basic idea is to use as weak of a magnet as possible that lets you trigger the transistor.

[PastorGordon]

It is a different circuit. With the basic SG type circuit, your trigger winding is on the same coil and is triggered by the magnet and with neos, what is being induced into that coil is way overkill and takes away from circuit efficiency.

If the trigger is being triggered by a magnet moving over a coil, which is not what is happening in that video as far as I know, the basic idea is to use as weak of a magnet as possible that lets you trigger the transistor.

I see... I've looked at this guys other videos, and from what I can tell the coil IS pushing the magnets on the rotor. I just figured he separated the trigger and run coils. Maybe I'm just not seeing past what I want to see lol...

I thank you for pointing out to me the difference in the circuit. This may help me from making a big mistake... It will be easy enough to change out to ceramics in my design though, so maybe Ill try both!

[PastorGordon]

I found a few minutes to work on it a little today... since my parts finally came in!

Here's a few pics....

[PastorGordon]

well, I got it together and running today

Now I just gotta figure out how to hook up these meters I bought...
Ill take pictures tomorrow evening and post... but hey, its running

[PastorGordon]

Here's the pics I promised...







I did switch out all the magnets to ceramics and noticed that the wheel spun much better... However I think I need to build a new coil.

The coil I built I used 20 and 24 gauge magnet wire, but I didn't count the "turns" as I rolled, I just used ALL of the wire I ordered, which was only 158 feet... I'm guessing that is why I am not getting very much current or voltage coming from the motor even when I spin it up with 12 volts...

Also, I am using a 10k pot... not a 1k. I have very little control over how fast the thing spins... Its like I have to have it turned up all the way for it to take off, and when I back off even just a little the whole thing stops. Is it because I'm using a 10k pot? or do I have the pot hooked up wrong? Please see the pictures to see how I have it hooked up.

Can someone explain to me how the winding's relate to increasing power? Im still unclear on how that works, and how to get the maximum benefit from the coil.

I also installed a power jack so that I can plug in a "wall wart" for source power while testing the output... But I still cant figure out how to properly hook up the volt and amp meters... any help would be appreciated.

[PastorGordon]

well... Murphy's law hits again!!! Apparently I had something hooked up wrong, and I've fried 2 transistors as well as the 10k pot!

I've re-built the entire circuit, and just now trying to figure out what to use for a pot since all I have is an audio volume control here... I think I'm going to order a wire-wound 1k pot as I've heard that you cant really fry them like these ones from Radio Shack.

I did figure out how to hook up the amp meter... but I'm still not sure how to hook up the volt meter without causing a short... I could use some help here guys...

[PastorGordon]

Due to very little response to this thread... I have moved my research over to John's Forum... HERE IS THE LINK

Please move all discussion or replies over there... I will continue checking here for a few days, but Ill be leaving this forum eventually.