On Nov 25, 4:47*am, Bruce wrote:
On Wed, 24 Nov 2010 17:28:59 -0800 (PST), Joe
wrote:
On Nov 24, 6:57 pm, Bruce wrote:
On Wed, 24 Nov 2010 06:34:55 -0800 (PST), Joe
wrote:
On Nov 22, 6:19 pm, Bruce wrote:
On Mon, 22 Nov 2010 07:21:00 -0800 (PST), Joe
wrote:
On Nov 22, 5:10 am, Bruce wrote:
On Sun, 21 Nov 2010 22:49:30 -0600, CaveLamb
wrote:
One of the problems using the engine propeller to turn an alternator
is that the prop pitch is all wrong.
By 90 degrees, in fact.
It works though, witness the bloke I mentioned that had an alternator
belted to the propshaft.... just that it doesn't produce much power.
Cheers,
Brice
Why not use stone wheels too Bruce, since you are talking about stone
age tech? Using a belt drive and a big alternator is not going to
capture much energy anything.
Now directly couple a motor/generator that consists of a stator
winding employing a high pole count configuration, which allows for
high copper utilization (minimizing energy loss and cost), and a
hollow rotor upon which powerful rare earth permanent magnets are
mounted on the outer circumference coupled to a variable pitch prop
system and you can pump out some serious energy. The city buses that
are using these moters claim they capture 97% of the kinetic energy
developed while stopping.
You are comparing apples to oranges.
Joe
How does, as you say "high copper content" decrease costs?
Cheers,
Brice- Hide quoted text -
- Show quoted text -
According to UQM" The stator is affixed to an aluminum housing, which
contains mounting end bells and bearings. This allows the rotor to be
suspended within the stator. Commutation of the machine is
accomplished electronically by sensing the position of the rotor in
relation to the stator, and intelligently pulsing electrical energy
into the stator such that the electric field generated by the stator
interacts with the magnetic field of the rotor producing rotational
motion ( motor operation ). Conversely, the application of rotational
motion to the rotor by an external force results in the generation of
electrical power ( generator operation ). UQM machines can be
operated in either a forward or reverse direction of rotation and
either in motor or generator mode and can dynamically change from one
mode of operation to another in millisecond response time. The hollow
design of the rotor permits the packaging of other components such as
gears and electromechanical brakes in the interior of the machine.
These design features contribute to lower usage of copper and iron and
other materials generally (due to smaller package dimensions),
reducing manufacturing cost over those for conventional machines of
similar power. In addition, the utilization of neodymium-iron-boron
( NdFeB ) magnet material in a wide range of consumer devices, such as
cell phones, disk drives and medical devices, has dramatically
improved the availability, performance and price of this material,
allowing us to price our advanced motors and controls competitively
with lesser performing conventional motors which we believe will
accelerate the rate of commercialization of our technology."
Joe
But.... you stated "high copper utilization" and when I question it
you provide a quote that states "lower usage of copper" ???
Utilization:
1. the act of using
2. the state of having been made use of
Usage:
1. the act of using
Cheers,
Brice- Hide quoted text -
- Show quoted text -
Ever hear of doing more with less?
Same thing.
let me quote
Utilization:
*1. the act of using
*2. the state of having been made use of
Usage:
*1. the act of using
Joe
I see. In your world High Utilization" means less.
You really are a piece of work aren't you.
Cheers,
Brice- Hide quoted text -
- Show quoted text -
Hello Brice,
Don't go getting your panties in a wad, sheeeze
High utilation can mean less.
Let me give you an example.
THE GOAL
You want to gold plate as much as possiable but only have one ounce of
gold.
OPTION 1
You plate the item only 1/1000th of an inch think. You have a "high
utilization" of the gold and can cover a very large area.
You can even keep a gram of gold for the effort.
OPTION 2
Now if you take the same one ounce of gold and make the plating 1/8 of
an inch thick you cover less and do not have a very "high utilization"
of the gold,
Both options use one ounce of gold, yet one has a higher "utilization"
of the gold but accomplish the same goal of plating a item.
Back to permanent magnet DC motors that you have a hard time
understanding the Architecture.
The goal is to get more energy by getting a "higher utilization" from
the same copper
Now with permanent magnet DC motors the new technology consists of a
stator winding employing a high pole count configuration, which allows
for high copper utilization (minimizing energy loss and cost),
Where the old DC perm magnet moters have less poles and big bulky
copper windings that get less energy from the same amount of copper
used.
The increased number of poles makes the magic happen more often, and
the improved magnets make it happen bigger.
Perhaps you have a hard time with the english, this may help.
http://www.youtube.com/watch?v=BBvGh...eature=related
Happy Thanksgiving!
Joe