Holt,
a place just a little closer to you is ALT Fabrication in Argyle. That's just
in Denton County off SH377.
It's where I found ground plates, and pretty much anything else made of copper.
http://www.altfabrication.com/
Thanks for choosing North Texas Renewable Energy
Jim Duncan
North Texas Renewable Energy Inc
817.917.0527
[EMAIL PROTECTED]
www.ntrei.com
----- Original Message -----
From: [EMAIL PROTECTED]
To: RE-wrenches
Sent: Friday, August 22, 2008 10:41 AM
Subject: [RE-wrenches] Braided grounding wire
Anybody know a source for braided grounding wire? Internet search
fruitless......
Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco,Tx. 76712
254-751-9111
254-228-9621 (cell)
[EMAIL PROTECTED]
----- Original Message -----
From: Kurt Albershardt
To: RE-wrenches
Sent: Friday, August 22, 2008 12:57 AM
Subject: Re: [RE-wrenches] motor starting issues (was: offgrid
systemquestion)
--On Tuesday, August 19, 2008 7:57 AM -0700 Peter Parrish <[EMAIL
PROTECTED]> wrote:
>
> Any motor will need both a voltage and current to operate properly, and
they tend to draw more and more current as the source (inverter) voltage drops.
Back to basic physics:
Depending on design, electric motors can be constant power or constant
torque (or some combination of two) devices.
Three phase AC motors are generally simpler in design and better behaved
than either either single phase AC motors or DC motors. Permanent magnet
synchronous 3Ø AC motors (available now) closely approach the theoretical
limits of electromechanical motor systems in general.
Modern power electronics and control systems give us essentially perfect
control of voltage, current, and frequency in AC systems.
Intelligently combining the above allows us to design efficient
electromechanical systems which match nearly any complex supply impedance.
These systems also happen to live longer, fail less often, and reduce both
battery bank and inverter requirements.
The market (arguably free on so many levels, and obviously not on so many
others) can address this using current technology. System sizing math not has
changed fundamentally in several decades but we are getting closer to those
fundamental limits.
Industrial systems are a bit ahead of the consumer market in some areas but
behind in others. As one very basic example, Turbocor's maglev compressor has
created a few waves in the commercial and light industrial sector but I fully
expect some fascinating trickle-down benefits over next few years
<http://www.turbocor.com/products_technology/>
.
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