Thane;

Please don't take this as criticism but as genuine interest.

I hope I didn't miss this information on an earlier post but I was wondering what kind of motor you will be using in you Dune Buggy.  It obviously is not going to be a fractional horsepower ac induction motor.  Even a larger 5 to 10 HP induction motor does not make sense since they are extremely heavy and would require higher voltage therefore more weight with the associated  power pack to feed it.  A dc motor is the most obvious but my interest is in how you intend on taking advantage of the magnetic coupling effect, when a motor coupled to the drive axle via some form of transmission will spend most of it's time at a some speed ratio of the buggy's speed.  In essence the only time the motor could accelerate is on a long run at higher speeds. I guess the regenerative aspect is what your after so that you can recharge the battery. Am I wrong in this assumption or is there more that I'm missing. To get the advantage of increased torque (that I myself witnessed) the motor had to reach a critical minimum speed and only then did it exhibit this.  When a dune buggy is moving the motor may not see this sustained speed for a lengthy period, unless you are driving a long straight stretch.

Looking forward to your comments.

Regards
Vince

[Thane;

Please don't take this as criticism but as genuine interest.

DON'T WORRY PB HAS THAT COVERED.

I hope I didn't miss this information on an earlier post but I was wondering what kind of motor you will be using in you Dune Buggy.  It obviously is not going to be a fractional horsepower ac induction motor.  Even a larger 5 to 10 HP induction motor does not make sense since they are extremely heavy and would require higher voltage therefore more weight with the associated  power pack to feed it.  A dc motor is the most obvious but my interest is in how you intend on taking advantage of the magnetic coupling effect, when a motor coupled to the drive axle via some form of transmission will spend most of it's time at a some speed ratio of the buggy's speed. 

WE HAVE A DC BRUSHED GOLF CART MOTOR WHICH WE ARE BENCH TESTING RIGH NOW.
WE ARE ALSO CONSIDERING A 3 HP INDUCTION MOTOR IF THAT FAILS.
NO TRANSMISSION - DIRECT DRIVE.

In essence the only time the motor could accelerate is on a long run at higher speeds. I guess the regenerative aspect is what your after so that you can recharge the battery.

YES - WE JUST WANT TO AVOID DECELERATION IS ALL.
PERHAPS OUR GENERATOR WILL HAVE TO KICK IN AT 15 MPH - BELOW THAT WE USE IT AS A REGENERATIVE BRAKE.

Am I wrong in this assumption or is there more that I'm missing. To get the advantage of increased torque (that I myself witnessed) the motor had to reach a critical minimum speed and only then did it exhibit this.  When a dune buggy is moving the motor may not see this sustained speed for a lengthy period, unless you are driving a long straight stretch.

YA LIKE ON THE WAY TO THE BEER STORE EH?
BUT SERIOUSLY GO BACK TO THE YOUTUBE DEMO VIDEO #4 - TOROID GENERATOR COIL.
WE ARE ONLY LOOKING AT 50% OF THE OVERALL PICTURE SO FAR IN THIS CHATROOM.
FINALLY OUR GOAL IS A MODEST 25 - 50 % IMPROVEMENT.

AND DON'T FORGET THE MORE COILS YOU HAVE AND THE HIGHER THE VOLTAGES PRODUCED THE LOWER YOUR "THRESHOLD" SPEED WILL BE - IT MAY EVEN START AT 1 RPM IF WE ARE FORTUNATE AND DO OUR JOBS RIGHT.

Thane

Looking forward to your comments.

Regards
Vince

Quote from: OilBarren on April 02, 2008, 06:52:34 PM

THEORY AND OPTIMIZATION CAN ALL HAPPEN LATER ON WHEN OUR TROOPS ARE SAFE AT HOME AND OIL WARS ARE NO LONGER TOLERATED OR REQUIRED.

Amen, brother. 

Quote from: OilBarren on April 02, 2008, 06:52:34 PM
I AM POSTING THIS PM FROM PB BECAUSE MAYBE HE (OR SHE) FINALLY HAS SOMETHING REALLY WORTHWHILE TO CONTRIBUTE... AND TO BE BLUNT - RIGHT NOW WE ARE SIMPLY LOOKING FOR A QUICK LAY.
Thane

Well, that wasn't really what I had in mind 
PB

Hi all,

this post is for our dear Polar opposite, aka...polarbreeze. My congratulations to you  on being one post away from a 200 post score. I must say that I am impressed with your dedication to this topic. In case you guy's and girl's have not noticed, polarbreeze has only posted at this topic and nowhere else. 

As I understand it, all efforts have value and over time will give fruit. So my dear polarbreeze, even though I say you are a Polar opposite, maybe because I don't buy 100% of modern day science, doesn't mean anything. North pole has no force without the South polar opposite. So feel free to speak your mind, or even better, come at the O. U. lab and bring in all the measuring equipment you want and measure, probe and chart to your hearts content and post all your findings to help your fellow scientifically minded brothers and sisters. This maybe your best contribution to this topic, real scientific data.

If you don't have a car I'm sure Thane can even pick you up, just let us know.

Stay tuned, polarbreeze maybe coming.

Luc