Author Topic: unusual motor very interesting  (Read 2463 times)

0 Members and 1 Guest are viewing this topic.

Offline siliconmix

  • Frequent Contributor
  • **
  • Posts: 466
  • Country: wales
unusual motor very interesting
« on: June 12, 2012, 08:26:04 pm »
 

Offline G7PSK

  • Super Contributor
  • ***
  • Posts: 3647
  • Country: gb
  • It is hot until proved not.
Re: unusual motor very interesting
« Reply #1 on: June 12, 2012, 08:34:07 pm »
Those bearings wont last very long, I can hear them rumbling already.
 

Offline MikeK

  • Frequent Contributor
  • **
  • Posts: 577
  • Country: us
Re: unusual motor very interesting
« Reply #2 on: June 12, 2012, 08:54:37 pm »
He's passing current through the bearings?  Oh gawd.

I think Honda had a problem a while back where the electrical system was grounding through the front wheel bearings, causing them to wear out well before their time.
 

Offline mikeselectricstuff

  • Super Contributor
  • ***
  • Posts: 12048
  • Country: gb
    • Mike's Electric Stuff
Re: unusual motor very interesting
« Reply #3 on: June 13, 2012, 12:30:42 am »
Fun but utterly useless - More info here :
http://electricstuff.co.uk/bbmotor.html
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 

Offline Unclegummers

  • Contributor
  • Posts: 13
Re: unusual motor very interesting
« Reply #4 on: June 13, 2012, 12:43:44 am »
Is that FREE ENERGY?!?! 8)
 

Offline Mechatrommer

  • Super Contributor
  • ***
  • Posts: 9209
  • Country: my
  • reassessing directives...
Re: unusual motor very interesting
« Reply #5 on: June 13, 2012, 01:06:27 am »
Is that FREE ENERGY?!?! 8)
free energy to the air. 25A to get a usefull rotation? my car cigarette lighter butt is better.
if something can select, how cant it be intelligent? if something is intelligent, how cant it exist?
 

Offline siliconmix

  • Frequent Contributor
  • **
  • Posts: 466
  • Country: wales
Re: unusual motor very interesting
« Reply #6 on: June 13, 2012, 07:42:02 am »
Fun but utterly useless - More info here :
http://electricstuff.co.uk/bbmotor.html
is that your site mike ? .but what if every other bb is a magnet ? pmsl :)
 

Offline G7PSK

  • Super Contributor
  • ***
  • Posts: 3647
  • Country: gb
  • It is hot until proved not.
Re: unusual motor very interesting
« Reply #7 on: June 13, 2012, 07:46:29 am »
If I read the operation principle correctly as the bearings heat up the whole thing will become less and less efficient to the point that when the balls are as hot overall as they can get before melting and there fore no more thermal expansion and more importantly enough residual heat to prevent rapid contraction after the expansion it will grind to a halt.
 

Offline SeanB

  • Super Contributor
  • ***
  • Posts: 15167
  • Country: za
Re: unusual motor very interesting
« Reply #8 on: June 13, 2012, 03:34:05 pm »
I have done that, it works well, if rather inefficiently. Just remember to use steel endcap bearings, or remove the rubber endcaps, otherwise there will be fun. Works best using a 12V car battery, and around 5m of 2.5mm bare steel wire as a ballast resistor. The wire glows red during startup ( until you move the shaft to start) and then cools down to just burning hot but not glowing. The motors generally will run for 5 minutes before something fails, either the cage melts, the balls drop out or the raceway arcs enough to seize.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf