All,

>From one on the outside looking in, it would seem to me that without any
load, the power factor would be
minimal and rather constant.   Therefore, the power saving performance
would be minimal at best.   
However, with a varying (read on for a while, then off for a while), the
power factor correction would \manifest a noticeable savings, or at
lease an apparent savings.    

If I'm off base here, I apologize, and I'm sure someone will let me know
where I'm in error.


	
Regards,

	
Jim
 

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
Of gacrowell@micron.com
Sent: Monday, December 18, 2006 1:00 PM
To: piclist@mit.edu
Subject: RE: [OT] Stockton Engineer Creates Energy Saving Device

IIRC, all it really does is reduce the applied voltage.  Magic is in
figuring how far - I'm pretty sure it's looking at the power factor.
Early devices had a problem with motor starting; uP controlled devices
probably handle this better.

I recall seeing a display of one of these devices in a hardware store.
It had a motor running, and a power meter display, and you could switch
in the 'power saving' device.  Very dramatic, fabulous power reduction.
The motor was running with no load...

GC

> -----Original Message-----
> From: piclist-bounces@mit.edu
> [mailto:piclist-bounces@mit.edu] On Behalf Of Harold Hallikainen
> Sent: Monday, December 18, 2006 11:33 AM
> To: Microcontroller discussion list - Public.
> Subject: RE: [OT] Stockton Engineer Creates Energy Saving Device
> 
> I recall that NASA patent. So, what are the losses in a lightly loaded

> motor, and what do you do outside of the motor to reduce them?
> 
> Harold
> 
> 
> > This goes back to a NASA patent from the '70's.  Nothing
> new.  I suspect
> > his 'patent pending' depends upon some minor new quirk or
> its simply an
> > 'application' and won't get any further.  It's been on the market in

> > many different forms, by many manufacturers.  It does work,
> but savings
> > depends highly upon the application.  Best for a
> long-running lightly
> > loaded motor - in many cases it doesn't provide any ROI, in fact no 
> > savings if the motor is sized properly in the first place.
> I've seen it
> > for less.  I believe the same technology is already built into many 
> > high-end appliances.
> >
> > Here's the same thing:
> > http://www.powerefficiencycorp.com/
> > http://smservice.com/pwrcomm.htm
> > 
> http://mlmvs.trustpass.alibaba.com/product/11458622/Nesly_Powe
> r_Saver.ht
> > ml
> >
> > Usually more than just power factor compensating capacitors.
> >
> > Gary Crowell
> >
> >
> >
> >> -----Original Message-----
> >> From: piclist-bounces@mit.edu
> >> [mailto:piclist-bounces@mit.edu] On Behalf Of Martin Klingensmith
> >> Sent: Saturday, December 16, 2006 7:43 PM
> >> To: Microcontroller discussion list - Public.
> >> Subject: Re: [OT] Stockton Engineer Creates Energy Saving Device
> >>
> >> How much more vague could it be? It sounds like a free energy 
> >> device. I don't know what it does. Nobody knows what it does. Are 
> >> we just supposed to say "oh, cool"
> >> I can't find any patents with his name either. Who knows.
> >> --
> >> Martin K
> >>
> >> Jinx wrote:
> >> >> http://cbs13.com/local/local_story_347191740.html
> >> >>
> >> >
> >> > "Chuck Larue may be the man who drastically cuts your
> >> electricity bill"
> >> >
> >> > Realising that the device seems to be just for motors, I
> suspected
> >> > that the press had gone all hyperbolic again -
> "drastically" - but
> >> > then thought about his customer base
> >> >
> >> > Do homes in the "US And A" ** have many motors, such as AC, fans,

> >> > etc ? I'm pretty sure the only motor in most NZ
> homes, being
> >> > a temperate climate, is in the refrigerator
> >> >
> >> > Just a quibble - the article says that a 1/3 HP motor was using 
> >> > 180W. As a HP is (ideally) 746W that would make it a 1/4 HP and 
> >> > with heat losses you'd expect input W to be higher. Not picking 
> >> > on anyone, may not have been reported accurately
> >> >
> >> > ** Thank you Borat
> >> >
> >> >
> >>
> >> --
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> >>
> >
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> >
> 
> 
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