- #1

Rana13

- 13

- 0

## Homework Statement

Hello everyone. I am doing a project where I have built a bicycle generator. We have everything set up and the alternator is putting out approx 45 amps and we also have a 12V car battery.

My issue is that we need to write a short paper on the mathematics behind this device.

Data I have:

Crank arm=170mm

Radius of sprocket= need to be measured, but its a 46 tooth track chainring

Alternator=1999 Honda Civic used, is putting out about 45 amps

Battery=12V car battery used

## Homework Equations

torque=r*F*sin(theta)

force=m*a

## The Attempt at a Solution

All I need is relevant equations that are involved in such a project.

My initial thought was to say, well if I ride an average of 5 mph for 10 minutes, I can sort out from there how much power out I generate.

Does the above sound like it's possible? Is there a connect from the bicycle to the power out of the alternator? Do i need to know how many rotations of the alternator wheel generates how much current, etc?

Very confused, would love some help. It doesn't need to be overly complicated, just a page or two worth of equations and information explaining we understand using math how this works.