Thane Heins Perepiteia.

[polarbreeze]

I think I would. I have in mind, for example, the two curves in figure 12 (page 9) of this paper: AC Induction Motor Fundamentals

Remember that the shorted coil has to act like a brake.Ã,  Comparing the two load curves on page 9 in that paper, you can see that the unstable load requires less torque than the stable load at some speeds.Ã,  This is inconsistent with the application of a brake.

I wonder then if the motor's torque-speed curve actually has a positive slope, not a negative one, at this point. It seems likely because the motor is running at only about 20% of its rated speed. That doesn't necessarily explain it either, I realize, but see also my post 1457: I'd be interested in your thoughts around that.

PB

[polarbreeze]

The more fundamental question is whether pushing the system into instability, however you do it, can actually result in any power gain because as I said before this has to be about power, not about speed.PB

WHERE'S MICHAEL FARADAY(Faraday's Law of Induction re: deltaT) WHEN YOU NEED HIM?
Thane
ps oh look...here he is:
http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/farlaw.html

Power, Thane. Not voltage. Power. Mr Faraday is supportive, as is Mr. Lenz.
PB

[OilBarren]

The more fundamental question is whether pushing the system into instability, however you do it, can actually result in any power gain because as I said before this has to be about power, not about speed.PB

WHERE'S MICHAEL FARADAY(Faraday's Law of Induction re: deltaT) WHEN YOU NEED HIM?
Thane
ps oh look...here he is:
http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/farlaw.html

Power, Thane. Not voltage. Power. Mr Faraday is supportive.
PB

POWER = V^2/R
THE FASTER THE GENERATOR TURNS THE MORE POWER IT PRODUCES - deltaT gets smaller.
THE FASTER THE INDUCTION MOTOR TURNS THE LESS POWER IT CONSUMES

SO INFACT IT IS ALL ABOUT SPEED.

Thane

[polarbreeze]

THE FASTER THE GENERATOR TURNS THE MORE POWER IT PRODUCES

...and the more mechanical power is required to drive it.
PB

THE FASTER THE INDUCTION MOTOR TURNS THE LESS POWER IT CONSUMES

Not if you're also asking it to deliver more mechanical power to the generator.
PB

[vibrovirii]

Hi Thane and others, I would like to thank you for all this information and effort   
I'm half way through reading the pages and making lots of notes.
Going to play around with this after i'm done reading this topic.

Peace, V