Thread: Solar panels?

Originally Posted by Ausi319

yea i think that will work!
but hmm...
how to get my dad to buy it for me lol

but i dont think 2500rpm is enough is it?
i have seen them have 10,000 and 50,000 so yea...
is that really good?

(also how do i get the 24V with batteries and keep it goign for a while?)

10000, 50000 RPM motors would require a very large drive ratio (a very small gear on the shaft that drives the wheels and a very large one on the motor) at that rate you would never get up to speed. Those motors turn fast, but do not make a lot of torque. Torque is what gets you up to speed, Hp is more of an indicator of how fast you will go. You will be better off with the 2500RPM motor. Even so, if your cart has 8 inch tires, then for every revolution the tires turn, you will move 3.14 x 8 inches, lets round that to 25. Then for a top speed of idk... 15mph?... 15mi/hr x 5280ft/mile x 12in/ft / 60min/hr = 15840 inches per minute. / 25 inches per tire revolution = 633 tire RPM. 2500 motor RPM /633 tire RPM = ~4 times larger gear/sprocket/pulley on the motor than on the wheel shaft. (whew, that's more reasonable than what I had before, 1.9 million hahahahahaha, too bad my initial version got copied below)

That means the gear on the motor has to be 4 times larger than the one on the wheel shaft. Thats maybe too big, closer to 1:1 or even the other direction will give more torque to get you up to speed faster. With a 50000RPM motor the ratio would be such that the motor gear would have to be about 80 times larger than the one on the wheel shaft (that's more what I expected, sue me, I was tired). Any reasonable size pulley would not provide the force you need to get moving...But the top speed would be nice.

Hopefully that will help you figure things out some, given different situations.

and for 24V...

when you connect the negative of one battery to the positive of the other, then the remaining two terminals at the end, which are + and - if you do it right, have a voltage equal to the addition of the voltages of those 2 batteries. That is what we call connecting 2 batteries in series. 2 12V batteries connected in series provide 24V. 4 6Volt batteries in series also makes 24V. and so on.

Originally Posted by h3rk

10000, 50000 RPM motors would require a very large drive ratio (a very small gear on the shaft that drives the wheels and a very large one on the motor) at that rate you would never get up to speed. Those motors turn fast, but do not make a lot of torque. Torque is what gets you up to speed, Hp is more of an indicator of how fast you will go. You will be better off with the 2500RPM motor. Even so, if your cart has 8 inch tires, then for every revolution the tires turn, you will move 3.14 x 8 inches, lets round that to 25. Then for a top speed of idk... 15mph?... 15m/hr x 5280ft/mile x 12in/ft x 60min/hr = 1.9 million inches per hour. 1.9M inch/hr / 25 inches per tire revolution / 60 min/hr = 12672 tire RPM. 12672 tire RPM / 2500 motor RPM = ~5

That means the gear on the wheel shaft has to be 5 times larger than the one on the motor. Thats maybe too big, but bigger on the wheel shaft will make more torque to get you up to speed faster. With a 50000RPM motor the ratio would be .25 which means the gear on the motor would have to be 4 times larger than the one on the wheel shaft. No good for getting you moving...

Hopefully that will help you figure things out some, given different situations.

and for 24V...

when you connect the negative of one battery to the positive of the other, then the remaining two terminals at the end, which are + and - if you do it right, have a voltage equal to the addition of the voltages of those 2 batteries. That is what we call connecting 2 batteries in series. 2 12V batteries connected in series provide 24V. 4 6Volt batteries in series also makes 24V. and so on.

where do i get 6V batteries?
What if i make the battery w/ the 6 volts.(4)
and then make the same thing about 4 times
but hook them all in parallel for more run time?
because wouldnt that boost the mA? insterad of the voltage

i was looking at the 12 volt ones but there $20 but i think i might have a friend to help pay...
(ok 2 friends)

but how do i hook them up in series (if i get 4 hook up 2 in each) then the 2 left over for the ones that are together put thoughs 2 in parallel to get more run time but still have the 24V

(but i need to know how to hook them up because i dont c any

http://www.bfmbatterysales.com/index...ROD&ProdID=194'


motor i might use (but how fast will this one go)
http://www.scooterpart.net/products.php?id=1063

Originally Posted by danielkh

Then all you need is this....

http://www.generatordepot.us/index.a...PROD&ProdID=54

...mounted to the back in order to power the motor and your golden!

sorry i dont have the money for that...

(i need a cheep generator i can hook with a belt to the bar holding the wheels to have the wheels spin which runs the generator which might power like a lighting system( the lighting under the car or headlights)

Originally Posted by Ausi319

where do i get 6V batteries?

wal mart

Originally Posted by Ausi319

What if i make the battery w/ the 6 volts.(4)
and then make the same thing about 4 times
but hook them all in parallel for more run time?
because wouldnt that boost the mA? insterad of the voltage

yep, now you're thinkin!!!!

Originally Posted by Ausi319

i was looking at the 12 volt ones but there $20 but i think i might have a friend to help pay...
(ok 2 friends)

but how do i hook them up in series (if i get 4 hook up 2 in each) then the 2 left over for the ones that are together put thoughs 2 in parallel to get more run time but still have the 24V

(but i need to know how to hook them up because i dont c any

http://www.bfmbatterysales.com/index...ROD&ProdID=194'


motor i might use (but how fast will this one go)
http://www.scooterpart.net/products.php?id=1063

like this:



only for 24 volts use 12V batteries.

or using 6V batteries will look liek this:


EDIT: oh and I fixed some pretty major errors in post #372

meh, just modify a powerwheels

I want one!!

Originally Posted by h3rk

wal mart


yep, now you're thinkin!!!!



like this:



only for 24 volts use 12V batteries.

or using 6V batteries will look liek this:


EDIT: oh and I fixed some pretty major errors in post #372

1. where do i get the 12V ones?
i need them not to b pricey though...
dont got much money

2. hey and for the motor...
Is there any chance to get one that has about 2hp and is under 50$?

3. I'm running into trouble of how to get the petal...
I was thinking of taking the wires from the battery and putting them on the the petal so when it is up they dont touch... but put the ones for the motor on the bottom with like a metal piece to have the electric so when you push it down the + and - hit when they are the whole way down...
but when you are going full speed and then u just let off to slow down...
but how do i attach a brake that way?
so i can go to a complete stop?

(would this b ok for the 12v? http://tunerplaza.com/p-213059-recha...ive-light.aspx

(as in if i take the battery out of it?)
i need them cheep kinda have like no money except what friends and thats about it that give me)