Help Please: question about motors + turbines

[Mark]

Hello!
My name is Mark, I am looking for some feedback on my idea relating to
a zero emission electric & solar combination vehicle.

• Instead of relying on a large battery pack for all the power, I was
thinking about using a smaller battery and using the rotating wheel to
generate power.
• Specifically, 1 large or 2 small turbines will be installed, to
harness the power from the tires
• Excess power generated could be transferred back to the small
battery

What would I need to convert the turbine power into usable energy for
the electric motor (which would be running partly from battery and
partly from the turbine)?

Thanks for any ideas!

[Toma Dordea]

Mark,

To move the vehicle you need a certain amount of power x time = energy
(mechanical).
Usually this (mechanical) energy is provided by burning fuel in an
internal combustion engine who turns the wheels and so moves the
vehicle.
The energy can be provided by a solar panel installed on top of the
vehicle, but this energy, if no storage is provided, has to be used
(converted to mechanical energy to move the vehicle).
When driving downhill or braking, additional mechanical energy can be
generated, which can be either stored in a battery as electrical energy
using a generator (alternator) or as mechanical energy using a
fly-wheel.
But in either case, the amount of energy stored is not enough to move
the vehicle, except a relatively short distance.
What turbines are you talking about ?
Please keep in mind that when the vehicle is moving at a certain speed,
any turbine installed will slow it down.
If you are thinking at installing wind turbines on the car, such that
the vehicle shall move in the direction of the wind, the wind energy
depends on the relative speed between the wind and the turbine, the
faster you go, the lower the power you may use to store in your battery
is available.
If you plan to move the vehicle against the wind, you will encounter
even more losses and consequently less useful energy.

TOMA P. DORDEA, PE
ALFA TECH CAMBRIDGE GROUP

Main 408 487 1200
Direct 408 487 1258
Fax 408 436 1511
Mobile 408 726 2897

97 East Brokaw Road, Suite 300
San Jose, CA 95112

mailto: toma....@atcginc.net ; t.do...@ieee.org
http://www.atcginc.net

-----Original Message-----
From: Electric-Mo...@googlegroups.com
[mailto:Electric-Mo...@googlegroups.com] On Behalf Of Mark
Sent: Wednesday, May 14, 2008 07:53
To: Electric Motor Control
Subject: Electric-Motor-Control Help Please: question about motors +
turbines

Hello!
My name is Mark, I am looking for some feedback on my idea relating to
a zero emission electric & solar combination vehicle.

* Instead of relying on a large battery pack for all the power, I

was
thinking about using a smaller battery and using the rotating wheel to
generate power.

* Specifically, 1 large or 2 small turbines will be installed, to

harness the power from the tires

* Excess power generated could be transferred back to the small