DC Machines - You have to love em.

[AllThumbs]

OK, since I am all wound up (pun intended) about my solenoid engine running, I want to build another electric machine. I am thinking a regular DC motor with wound armature and field coils. The plan is an open design so all the whirly parts can be seen. As I mentioned in the solenoid post, I teach the electrical trade at a local college, including DC motors, and magnetism (among many other topics). I thought an open design DC motor would be another great teaching aid.

I will do some solid modeling and post what I have, when I have it.

Here is a picture to get things started:

 

[AllThumbs]

Of course, the picture above shows a DC motor with permanent magnets, but you get the idea.

E

 

[zeusrekning]

I have been playing with one for the last few weeks. I think the trick is in the brushes. I used brass sheet bent 90 degrees to rub the commutator(sp?). It caused to much friction but I couldn't get my wire brushes to work well either. I unboxed an angle grinder i bought a couple months ago and it had two replacement brushes in it :wall:
If I had found them sooner I would of tried it. I found a link with some really good info on building brushless motors. I would also like to do one of those.
Check out these links.
http://www.royuk.co.uk/electric_motors.htm
http://www.solcon.nl/gjkool/brushlessE5.html
I had one more link but can't find it, when I do I'll post it.
Good luck and keep us informed.
Tim

 

[AllThumbs]

I would like to see your motor if you have a pic.

Moderator, is this an appropriate subject for this forum? It's not a model engine. If you would like, just move the whole thread to the break room. It's up to you.

E

 

[Cedge]

Thumbs
Gave you seen these?.. We've been making them since 1932, AC or DC at various times, as well as the rare AC/DC combo version. Today they are all made as AC generators. There we go... now it's officially about models....LOL


Jensen Model #15 Miniature Generator

Steve

 

[Brass_Machine]

...
Moderator, is this an appropriate subject for this forum? It's not a model engine. If you would like, just move the whole thread to the break room. It's up to you.
...

E

I think you are fine right here for now. It looks to me as if you are planning/designing a new electric engine right? I am pretty sure that counts as a model engine. If it is just pondering about it, I can move it for you.

Eric

OK, since I am all wound up (pun intended) about my solenoid engine running, I want to build another electric machine. I am thinking a regular DC motor with wound armature and field coils. The plan is an open design so all the whirly parts can be seen.

 

[AllThumbs]

I plan on building it. I will start soon. Just needed to put the VFD on my lathe first.

Eric

 

[firebird]

Hi

A couple of years ago I was keen to learn about electro magnets. Not wishing to just make an electro magnet for the sake of it I decided to incorporate 2 in a simple engine. It's built mainly from odds and ends and scrap box bits but runs reasonably well. Once I had it running I cleaned it up a bit and mounted it on a polished wood base. Its amusing to watch it run, see what you think. Unfortunately when I took this video the battery didn't have a lot of charge in it so the engine slows down a lot towards the end.

[ame]http://www.youtube.com/watch?v=J5l17kaiQkQ[/ame]

Cheers

 

[4156df]

Hi Firebird,
Neat engine. I'm thinking of building something similar to your rocking motor as my next project. Would you share a little info regarding wire size you used on the electromagnets? voltage? Etc. I want to wind my own, but would like to have some kind of starting point.
Thanks,
Dennis

 

[Metal Mickey]

Slightly off your DC topic, can you tell me about the IC engine in your picture? Or point me towards the info? Mike