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what is the most efficient motor & generators

In both cases, one that isn't turning and has no current flowing.

Best way is to not run them when you don't need them.

Traction motor/regeneration systems are a different matter, there you try to optimize efficiency given that you need to accelerate and decelerate frequently, and many modern designs use the motor as the generator. Just not both at the same time like you seem to want!

In fact motors already work as generators while turning, this leads to "back EMF". After an unloaded motor spins up to full speed then the back EMF is nearly equal to the applied voltage (the difference being due to electrical and mechanical losses).

Tim.

Reply to
Tim Shoppa
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Many thanks,

Don Lancaster
Synergetics   3860 West First Street  Box 809  Thatcher, AZ 85552
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Reply to
Don Lancaster

what is the most efficient electric generator?

what is the most efficient electric motor?

Can a generator charge enough electricity to power a motor continuously? I assume there will be loss of energy. How best to supplement to loss of energy to make this operation continuous. This can be small power, such as

12VDC system.
Reply to
A. Jacobs

Where are we referring the perpetual motion questions to these days? :-)

Cheers! Rich

Reply to
Rich Grise

I read in sci.electronics.design that Rich Grise wrote (in ) about 'what is the most efficient motor & generators', on Wed, 14 Sep 2005:

That nice Australian guy who's always so helpful?

(You have a choice!)

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Regards, John Woodgate, OOO - Own Opinions Only.
If everything has been designed, a god designed evolution by natural selection.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
Reply to
John Woodgate

What does motor and generator efficiency have to do with perpetual motion? Did anyone mention to the OP that motor and generator efficiencies top out at a bit above 90% these days, typ about 92% for a "premium efficiency" integral horespower machine at full load, less at reduced loads? Not sure what the record is, but I think even the big experimental superconducting rotor winding motors or generators do not exceed 95%, and they are surely the efficiency record holders.

Reply to
Glen Walpert

The question is what is the MOST efficient motors and generators? So that we can understand what is the loss factory.

Not perpetual.

Then, we can implement methods to recharge the loss, using something such as rechargeable battery and charging using solar cells during day light hours.

Will that work?

Reply to
A. Jacobs

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