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Projects by members => Projects by members => Electrojolt => Topic started by: electrojolt on April 21, 2010, 16:30:22 pm

Title: Bicycle Generator
Post by: Login to see usernames on April 21, 2010, 16:30:22 pm
I have this thing to use a normal bicycle as a exercise bike. it uses a magnet on a wheel close to a aluminum disk in order to create resistance so the wheel does not run freely. What a waste of energy....

So I decided to built a bike generator so I can exercise and help charge my home UPS batteries.

Will be posting the progress here.
 
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 21, 2010, 17:18:55 pm
I have this thing to use a normal bicycle as a exercise bike. it uses a magnet on a wheel close to a aluminum disk in order to create resistance so the wheel does not run freely. What a waste of energy....

So I decided to built a bike generator so I can exercise and help charge my home UPS batteries.

Will be posting the progress here.

Thats a nice project A win win situation, as far as i see

Title: Re: Bicycle Generator
Post by: Login to see usernames on April 21, 2010, 23:09:28 pm
Right now Im waiting on some magnets, will be mounting a total of 72 magnets on the rear wheel.
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 22, 2010, 01:47:37 am
I was looking at whimhurst machines on youtube yesterday, and they have a small hand crank, and i was thinking it would be pretty cool to have a big pedal powered one, what do you think of that? some of them can make 4 inch sparks or more, would be pretty cool.
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 22, 2010, 02:01:29 am
Yes in did it would be cool.
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 24, 2010, 16:19:24 pm
Alright, I now have all 72 3/4 inch magnets.

Drilled and threaded all 72 holes on the bike wheel.

built 2 frames to mount coils, one is for a single pick up coil, the other is for 12 coils.

I want to test using a regular laminated transformer, by cutting open one end so I get and E shape.

so then each of the 3 legs of the E transformer is aligned with each magnet on the wheel.

Do any of you have an old laminated transformer 2 3/4 inchs ?
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 25, 2010, 01:48:30 am
Just mounted all 72 magnets,

built 2 coils using 2 old laminated transformers ( a little smaller than what I wanted 1 3/4 inch.) but getting 100 watts.

I'm liking this... going to make one more coil, since I just found one more transformer.
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 25, 2010, 04:32:42 am
this will make you appreciate what a 100 watt light bulb uses for energy :P

you should see if you can generate up to 746 watts, or 1 hp, that would be a neat acomplishment, then you can say you are as powerful as a horse!
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 25, 2010, 05:58:16 am
LOL...

I just added the 3rd coil and now it can generate about 130 watts. but need to sprint.

with the 3 coils it generates a little over 100 watts at an easy pace. Still have room for 3 more coils. maybe tomorrow I will had some, then I can pedal at a slower pace, or use different gears.

well 100 watts is not that hard to generate, but yes it does get you tired after some time.

I already connected a bridge rectifier and connected it to the charge controller.


here are some pictures.
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 25, 2010, 10:20:35 am
Electro jolt becomes Electro nuclear power.....

Nice bike, man.


Steve
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 25, 2010, 17:10:27 pm
thanks Steve,

My doctor advised that I exercise to help control my high cholesterol, but I had no motivation to do so, but now I have a reason to exercise...  like you said it is a win win situation.


I found some more old transformers, some are a little bigger than the ones I;m using now. Today I will add a few more and see how much power I can generate.


Title: Re: Bicycle Generator
Post by: Login to see usernames on April 26, 2010, 11:30:26 am
You could also add a trigger coil and fire all other coils as a monopole motor :P and use the emf spyke to charge batteries and with a switching circuit also your primairy battery, then you can sit next to it with a cold beer  ;D while it runs

But then again where is the exercise  :-X
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 26, 2010, 16:43:22 pm
ok, I finished this project.

I now have 5 modified transformers used as pickup coil. each transformer is magnetized by 3 magnets at a time, max power is about 20volts x 10 amps or 200 watts.

Title: Re: Bicycle Generator
Post by: Login to see usernames on April 28, 2010, 17:07:14 pm
you could make a small string of light bulbs, and have it set up so they light up one, plus one, plus one, plus one, plus one and so on as you increase your power generation, then have it in front of you like a bar-meter so it motivates you to pedal faster and light up the string of lights, like a carnival game or something

or put a hv coil on it and turn that 20 volts into 2 million volts an have lighting dancing around :)
Title: Re: Bicycle Generator
Post by: Login to see usernames on April 28, 2010, 17:31:55 pm
Good idea. but since the generator is connected to my 250 AH 12v battery, the voltage will not go over 12.8 volts. i did order an amp meter that i will install on the bike so i can monitor how many amps i pump. due to wire size the max amps is 10.