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rgbargee
New Member
United Kingdom
49 Posts |
 Posted - 21/10/2008 : 12:50:36 PM
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Im having a bit of trouble with my Bedini type motor ive basically had to forgo the buying of new bits n pieces (except a soldering iron and solder) and use what i could scrounge
the set up
-rotor is a drain pipe cap glued to the plate of a hard drive , mounted vertically ,took ages to get central but there is now minimum run out.
-six Maplins hole in the middle magnets all mounted N out (part no sf19)
-Top Hat type 3055 transistor
-Coil about 150 turns of 18 and 22 guage around a small magnet wire spool
-Core is copper coated mild steel welding rods for gas/tig
-1mm wire to connect em all together
-n007 and n001 diodes / 480 resistor / 1k pot and a 90v neon
think thats it all only the wire guage/turns is different
The problem is the coil just sits there whistling, you can play a tune on the pot, but the wheel refuses to accelerate when spun, i cant even get the thing to kick the magnet away by switching power coil ends over. Ive tried 6v in 10v in and 24v in but it just gets louder funny thing is if i place the on connection gently it doesnt whistle but if i connect sharply it does. Ive gotta admit im more of a wood and spanners guy this is my first foray into electronics .
This was just my proof of concept before going onto a torquey multi coiler to power a bank of batteries but i need to master this one and understand it first i think ive got more components on the way so i may have to start again,oh and my multimeter is intermittent- any help?
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theremart
Advanced Member
154 Posts |
Posted - 21/10/2008 : 2:50:33 PM
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1. Swap the wires on the coil to all 4 possible ways.
2. Verify your magnets are all north out ( when you put a compass up to it the south of the compass should be attracted to the magnet.
3. Check the size of your pot, 1k is what is needed for starting.. and other resistors inline with the pot, 57-100 ohm resistor OHH looking at your 480 ohm resistor that maybe your whole problem... try 100 ...
4. Check your input voltage.
See my playground here --> www.youtube.com/marthale7 |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 21/10/2008 : 5:41:38 PM
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| Thanks for the advise Theremart , it certainly changed the characteristics as my cheap croc leads melted together and smoked away at 24v lol, guess ill have to make some up with higher rated wire. Some positives though i can now make the power coil attract or repel the rotor which way do i want it attract or repel. Still no acceleration though , is there any way to work out if the transistor is actually switching , i have ten arriving in the morning of the flat black type so i can change it out if i have to . |
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theremart
Advanced Member
154 Posts |
Posted - 21/10/2008 : 8:29:00 PM
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Not cool.... for starting out 24V is not a good place to start as it allows for zero mistakes.
Smoke quickly appears at 24V. Best to start with 9-12V safer and more forgiving, and then work up. When you move up will will need stronger rated resistors.
The standard way is to have the coil making a north which meets the north of the magnet which repels...
Be sure always to have a load on the system ( charging battery ) as if you don't, that will fry your transistors in a hurry.
See my playground here --> www.youtube.com/marthale7 |
Edited by - theremart on 21/10/2008 8:29:55 PM |
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theremart
Advanced Member
154 Posts |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 26/10/2008 : 3:03:33 PM
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ok little update on my progress ,
ive rebuilt the circuit completely using all new components and the solder post type method as per daftmans videos and diagrams its set to repel ,all north out, and off 12v so the only thing different to the daftmans is ive only got 150 turns around my welding rod coil and im using 18 guage and 22 guage , i think the problem is either
a) the magnets are saturating the core so im not getting any switching at the transistor
or b) not enough turns and too heavy guage wire
im gonna change the coil out and wind one with finer wire or make a 'proper job' 450+ turn coil with the heavy wire ive got but first i want to complete a atx to benchtop power supply conversion so ive got a steady twelve volt supply to the energiser
thanks for the links ive hit most of em before but to get them all in one place is good ill let u know how the changeout works out |
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 26/10/2008 : 6:42:43 PM
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Sorry for not getting back on this quicker.
Like theremart posted maybe you have the ends of your coil wired the wrong way round, that can cores coils to whistle. 150 turns ort to do something but your coil will use a lot more currant and may get hot. (Depending on the power supplies voltage and currant.)
If the trigger side of the coil is not producing enough energy to trigger the transistor efficiently it may not run.
Hope that is of some help. Do you have any videos of your work?
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 27/10/2008 : 10:28:41 AM
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| No video at the mo but i reckon i can knock a couple of quick pics off later tonight , no laughing at the soldering though its a shallow learning curve for me lol. |
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 27/10/2008 : 11:03:08 AM
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No one will laugh at your work at TEEP this is a forum for all, including beginners’ we all had to learn from scratch once, so please post with confidence. Looking forward to seeing your work.
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 27/10/2008 : 1:08:37 PM
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OK here goes i made a you tube , i think? sure i saw a how to on here once but ill try and embed it
For anyone else who cant work out how to embed (this is try no 7) check out this vid
This link would be good on the FAQ if the admins watching
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Edited by - rgbargee on 27/10/2008 1:30:04 PM |
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 27/10/2008 : 5:12:59 PM
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Has I’ve just posted on your youtube video well done on your set up nice photos.
Theirs nothing wrong with your soldering or your build but one thing I have not mentioned before is try to avoid any phosphorus metals (metal screws bolts) on your set up if possible especially close to your rotors magnets they will only course drag. Within the rotor is ok as long as it spins with the rotor.
The link you are referring to is in the Terms & Condition & forum help. I will look into hi-lighting it more in someway. Thanks.
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 28/10/2008 : 08:20:37 AM
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still trying but no success, i flipped all the magnets over , i swapped wiring from daftmans to introvertebrates just in case, i swapped out both diodes just in case and im up to transistor no4 after a bit more smoke. Im limiting myself to 9-10v input from a car battery with a damaged cell (the other 4 are fine) but still no spin. Ive tried spinning by hand hard and slow and ive checked continuity through the coil and resistance through the pot and resistor and their still working fine. The coil doesnt get hot and the transistor only gets hot if i wire the output battery backwards. the diodes get hot if i wire the the input battery backwards. I dont appear to get the resonant whistle anymore though, think that was a result of the collector connection being dry soldered
im lost
gonna have another go tomorrow
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 28/10/2008 : 2:46:54 PM
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Please try building my diagram with your coil and rotor and see if it will run. Then if not you can post pics of it and we all can see what is going on and put it right together but I think you will find it will run if you use my diagram. I am only asking you to do that has I cannot follow you set up from the pic’s you posted or your video has you run some of the connections under the board out of site so wee cannot follow then. And just ignore the dim bats on youtube I get then all the time I’m considering switching off the post a text comment on all my videos I’m just spending to much time answering all of them. That way I will have more time for the TEEP forum.
This is where you can get the link to the printable diagram.
http://teep.forumco.com/topic~TOPIC_ID~87.asp
Together we will sort it.
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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rgbargee
New Member
United Kingdom
49 Posts |
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 29/10/2008 : 6:51:44 PM
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Nice work again, now lets see if we can get it running.
Yellow ring 1: please can you post the number on the transistor in full, I have come across some with different pin configuration.
Yellow ring 2: please can you make certain that the hi-lighted wire (in blue) is not connected to that post in anyway.
Can you please make certain that the hi-lighted wires (in yellow) are connected to the posts correctly?
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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rgbargee
New Member
United Kingdom
49 Posts |
Posted - 29/10/2008 : 8:13:14 PM
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The number on the transistors are
ST
TIP 3055
CC0V1 VW
MAR 827
got em from rapid online order code - 81-0196
Description - tip3055 100v NPN hi/v transist
TO218 RC
Ive added another cable tidy to hold the wire away from the post
Im gonna resolder the outlined joints at one position because there is carbon around where it enters the solder pad (maybe cold will sort it)
also i read somewhere that you need to use a croc clip as a heatsink when soldering the pins on the transistor sooooo ill change it out again and try to solder it quicker  .
How do i post just a picture? |
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rgbargee
New Member
United Kingdom
49 Posts |
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rgbargee
New Member
United Kingdom
49 Posts |
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teep
Forum Admin
United Kingdom
347 Posts |
Posted - 03/11/2008 : 11:42:12 AM
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You got it up and running well done. The thing that impresses me the most is your perseverance in getting it up and running. Most would have given up after the first attempt and put it down to it the fact that it just doesn’t work, again well done.
Yours theDaftman TEEP forums administrator.
See my videos on YouTube.
http://uk.youtube.com/profile_videos?user=theDaftman |
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Topic |
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All noise and no action - sounds familiar
