Lockridge Device - Peter Lindemann

[Matthew Jones]

Thanks Peter, I'll give that try.

I screwed up when I wound the coil and shorted them out to the rotor. So I had to unwind them and coat the thing with some epoxy. There are few spots that the nylon got wore off from demoing the rotor.
So no run this evening.
ALso I remove one wire I had in the thing.(Silver coating). It just made direct short. I am not sure why I hooked it up at all. LOL
But here's some pics.

I may rewind it like Peter suggested to Mark. The one in the picture is just 2 coils wound North. I see though that you can take advantage of all the poles in the motor and still stay on 2 (180 out) communtator positions.

Maybe I'll get it going to tommorrow.

Cheers
Matt

[rosehillworks]

Peter
In the zig zag scenario of winding the motor are we using it as an A field motor instead of an H field? Thanks, William

[Turion]

Peter,
I am still confused. Sorry. By definition, the stator is the stationary part of a rotor system. In my motor that would be the circular casing which has the curved magnets on it. The stator "face" would be, as I understand it, the magnets and /or the spaces between the two magnets. The center of the stator face would be either the center of the magnets (or of "a" magnet, two of which are opposite each other,so it would be the center of each) OR the center of the space between the two magnets, which are also opposite each other. I don't know what the "stator POLE face" is, unless by pole you mean North or South pole, in which case you mean the center of each of the magnets. Or do you mean something else entirely? Sorry, but my lack of understanding of this terminology is only surpassed by my lack of understanding of electrical principals in general, which is what makes this oh so much fun!

[phil.g]

Peter,
I am still confused. Sorry. By definition, the stator is the stationary part of a rotor system. In my motor that would be the circular casing which has the curved magnets on it. The stator "face" would be, as I understand it, the magnets and /or the spaces between the two magnets. The center of the stator face would be either the center of the magnets (or of "a" magnet, two of which are opposite each other,so it would be the center of each) OR the center of the space between the two magnets, which are also opposite each other. I don't know what the "stator POLE face" is, unless by pole you mean North or South pole, in which case you mean the center of each of the magnets. Or do you mean something else entirely? Sorry, but my lack of understanding of this terminology is only surpassed by my lack of understanding of electrical principals in general, which is what makes this oh so much fun!

Part of the fun is experimentation. Try it one way, see what happens, if it doesn't spin, try the other way.

[Mark]

Turion,

LOL, now you sound like me
You'll want the slots where the wire is to be centered where the gap is between the 2 magnets.

[Mark]

Attention!!!!

DO NOT BUY THIS MOTOR FOR THIS PROJECT!! 24 VDC 250W MOTOR, 11 TOOTH SPROCKET | AllElectronics.com

All of the coil winding are glued into the rotor and it is impossible to unwind I have been working to unwind it for an hour now and have not been able to pull any of the wires thru the slots. There are also insulators between the slots that must be glue because I am unable to remove those also. I have some 2" cut off wheels I will try using tomorrow to try and cut the wire off but I will probably end up damaging the rotor.

[Peter Lindemann]

Not What I Said

Turion,

LOL, now you sound like me
You'll want the slots where the wire is to be centered where the gap is between the 2 magnets.

Turion,

Sorry for this. In this situation, Mark is NOT saying what I am saying. I want the slots with the wires in them to be CENTERED in the middle of your NORTH and SOUTH MAGNET POLES when they are turned on by the brushes. As the current moves through the windings, they will be REPELLED from the magnets and forced OUT OF THE FIELD.

This is the THIRD TIME I have said it.

Peter

[IndianaBoys]

This is the THIRD TIME I have said it.

Peter

Picture or sketch worth a thousand words,

IndianaBoys

[emfimp]

Ooops!

I have to say that I pictured the windings in the space between the magnets too (while firing) - oops! Thanks for your perseverance Peter!

Thought I'd upload a quick sketch for all. I tried this wiring setup tonight - works well! Loads of torque, even just on 12 volts. I don't have my recovery brushes set up yet, and with around 1 minute run time I can already see black on the commutator where the radiant energy is arcing back. Woohoo!

So this motor is just a cheap windshield wiper motor that I'm messing with - the two windings you see are original - I didn't wind them. I did have to change where they meet the commutator. (They are wired in parallel with each other)

You can see one of the brushes, & it lines up with the bolt hole in the case. (where the stator bolts over the rotor) This bolt hole happens to line up perfectly with the center of the pole face of the stator magnet. So the brush is firing in the position you see, & the windings are right at the center of the mag pole. This does work very well!

More mods tomorrow...

[FRC]

Whats the motor ?

So this motor is just a cheap windshield wiper motor that I'm messing with - the two windings you see are original - I didn't wind them. I did have to change where they meet the commutator. (They are wired in parallel with each other)
More mods tomorrow...

Could you tell us what the specific motor is? Out of what kind of vehicle?

Thanks

FRC

P.S. I am not sure if the Gyrocopter Co. is still going. The owner crashed and died in one of them a few years ago.

[Turion]

Thanks Peter. I hated to keep asking over and over, but I wanted to be clear. Apparently I wasn't the only one who was confused, which is good to know. I sincerely appreciate your patience on this issue. Now I can proceed with confidence. Nothing worse than THINKING you have it right when you arer wrong.

[Matthew Jones]

Thanks Peter. I hated to keep asking over and over, but I wanted to be clear. Apparently I wasn't the only one who was confused, which is good to know. I sincerely appreciate your patience on this issue. Now I can proceed with confidence. Nothing worse than THINKING you have it right when you arer wrong.

There is no better way to learn though. Trial by fire.

Cheers
Matt

[Mark]

Turion,

Sorry for this. In this situation, Mark is NOT saying what I am saying. I want the slots with the wires in them to be CENTERED in the middle of your NORTH and SOUTH MAGNET POLES when they are turned on by the brushes. As the current moves through the windings, they will be REPELLED from the magnets and forced OUT OF THE FIELD.

This is the THIRD TIME I have said it.

Peter

SORRY!! This totally blows me away! I thought that by winding 1 coil in the middle of the rotor would cause 1/2 of the rotor to be north and the other half to be south and where the actual windings are to be the neutral zone. I know if you wind an air core coil all by itself that is the case but when put inside these kind of rotors that totally changes the dynamics? I'll have to think about this one, right now it doesn't make any sense to me Sorry again everyone, just glad that the error was caught, hope I didn't mess you up Turion.

Mark

[emfimp]

Not the one you want...

Could you tell us what the specific motor is? Out of what kind of vehicle?

Thanks

FRC

P.S. I am not sure if the Gyrocopter Co. is still going. The owner crashed and died in one of them a few years ago.

It is from Princess Auto originally, stock # 8002881, but is definitely NOT the ultimate motor for this conversion. There is no room for a flywheel, and will be very difficult to load down mechanically if you actually want to measure output. I'm only using it right now because I got it for free!

[emfimp]

SORRY!! This totally blows me away! I thought that by winding 1 coil in the middle of the rotor would cause 1/2 of the rotor to be north and the other half to be south and where the actual windings are to be the neutral zone. I know if you wind an air core coil all by itself that is the case but when put inside these kind of rotors that totally changes the dynamics? I'll have to think about this one, right now it doesn't make any sense to me Sorry again everyone, just glad that the error was caught, hope I didn't mess you up Turion.

Mark

Hi Mark,

Here's what I understand... If you draw the lines of force between the magnets (in the drawing I posted), you'll notice that the wires are in the position to cut the maximum number of lines of force at 90 degrees. If you were to rotate the coil 90 degrees, it would cut zero lines of force @ that point. (Would move parallel to the lines of force.) So this position is where your maximum back emf will be generated, and max reverse motor torque occurs here in a generator.

So logically, why wouldn't max forward motor torque occur here in a motor?