ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
"Esoteric" countries and their wiring practices?
by winston_1. 04/23/19 02:34 PM
Norwegian power?
by Texas_Ranger. 04/20/19 06:27 PM
Welded Copper Connections
by gfretwell. 04/19/19 04:46 PM
Israel
by annemarie1. 04/18/19 02:35 PM
Water heater calculationsSo when I count calculati
by watersparkfalls. 04/13/19 12:43 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 4 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
self contained generation #127740
10/25/01 02:10 PM
10/25/01 02:10 PM
G
glenn35  Offline OP
Member
Joined: Jul 2001
Posts: 40
For the longest time I have always wondered why they say self contained generation isn't possible.

Has to do with perpetual motion I guess but I still don't understand it.

It seems to me that in theory you could connect the output shaft of a motor to the input shaft of a generator, connect the output wires from the gen. to the input of the motor, give it a good healthy spin and it would go on forever feeding itself.

Why is this impossible?

glenn35

Tools for Electricians:
Re: self contained generation #127741
10/25/01 03:34 PM
10/25/01 03:34 PM
G
ggardiner  Offline
Member
Joined: Oct 2001
Posts: 81
Calgary, Alberta Canada
I'm not too sure on this myself and often wondered about it. But I think the fact nothing works at 100% efficency all the time over a period of time the system would fail.
If you loose .1% eff each revolution its only a matter of time but you reach a stall condition.

Re: self contained generation #127742
10/25/01 04:24 PM
10/25/01 04:24 PM
P
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Yes, it's the fact that the conversion of electrical to mechanical energy and back again is not 100% efficient. Some of the power supplied to the motor, for example, is dissipated as heat in the resistance of the windings. More power is lost in overcoming the inertia and friction of the bearings in the motor and generator.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
cookcc
cookcc
California ,Long Beach
Posts: 28
Joined: May 2007
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
254,566 Are you busy
190,790 Re: Forum
180,518 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 15 (0.004s) Memory: 0.9508 MB (Peak: 1.0789 MB) Zlib enabled. Server Time: 2019-04-25 06:01:40 UTC