motorcycle project

[marytappenden]

I am currently completing an end of course project and could do with some guidance, my idea is to create an appliance charger that runs of the motion of the wheel. my initial idea of attaching the charger was to the swingarm of the bike and then run a lead/usb up. I was wondering if anyone has any advice or better ways of completing this project safely and successfully.
Any advice will be greatly appreciated feel free to message or email me
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Many Thanks

Mary Tappenden

[Taught2BCauti...]

You could start by trying one of those tyre-driven bicycle dynamos, but most of them are 6V @ 3W, so you would probably need to use it to charge a Li-Po battery and use an inverter to get higher voltages.
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[Rogerborg]

Correct me if I'm wrong, but don't motorcycles usually come with electrical systems? Even my Enfield has one, of sorts.

It seems a very curious project, is my drift, I'm wondering about the actual purpose of it. Is it to show that you can do a solid implementation of a nonsensical requirement?
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[finniee]

From my understanding OP means is using motion from the wheel to charge an external battery and using that external battery to power sat nav and things like that instead of wiring straight into the loom itself.

OP, look into hand crank generators.

[Taught2BCauti...]

Roger is correct - but then again, a lot of college projects are designed to challenge your thinking, not to end up with a practical outcome.

One of my college projects was to calculate the cost of building a car from scratch, using the parts catalogue - another was to modify a single-cylinder 4 stroke engine to run on compressed air!

I'm sure OP is aware that a tyre-driven dynamo requires more power to drive it, than it will give out in electrical energy, so the value in the challenge would come from the design and implementation, rather than the practicality.

You could introduce a solenoid to disengage it from the tyre when the Li-Po battery was fully charged, but would also need to match the gearing to allow for the difference in the range of rotational speeds, between bicycle and motorcycle tyres.
____________________
Honda Varadero XL125(V8)
www.TheFutureIsHere.eu

[truslack]

[Wonko The Sane]

I can't even begin to think where it would fit on sports bikes due to space.

Will the power drop when I'm stopped or will there be a capacitor to keep power until the lights change and I move again?
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[Taught2BCauti...]

[map]

[Rogerborg]

[Taught2BCauti...]

[dolly3900]

OP.

Something I have looked at as a practical application for an Eco car project in school and one of the ideas I had was this.

Tight coils of wire, wound around the fork leg (using the leg {assuming a FE base leg} as a central FE core)
Magnets mounted on the wheel spoke/rim.

Action of magnetic field across the coil of wire (secondary magnet
mounted behind the coil) should induce current flow.

Simple rectifier and regulator should give usable power source.

I'll be honest, this did not make it past the theoretical stage as we went for a solar solution to power/charge the ancillaries in the end, but might be worth a punt even for process of elimination purposes.

Give me a shout if you do, I'd be interested if the theory was sound.

Mike
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2002 Rieju RS2-50 (Sold, spares or repair), 2010 Suzuki DR-125SM (Traded for ->), 2007 Honda CBF 600 (Sold), 2010 Suzuki V-Strom 1000 (Briefly, now returned), 2007 Suzuki Intruder 1800m (Even More Briefly, traded in for ->), 2014 Suzuki V-Strom 650

[WD Forte]

Wind generator?
As theres nothing new under the sun, I googled it and yep
someone's already done it

https://cdn.akihabaranews.com/sites/default/files/styles/akiba-custom/public/field/image/Thanko_Portable%20wind%20turbine%20generator_main.jpg?itok=KQ4TGlNR
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[Northern Monkey]

Could you keep a hamster, and a hamster wheel, in a top boxes. They run quite fast when they feel like it. Would that be enough energy to charge my iphone?
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[Baffler186]

[Phoenix]

[pits]

This is a somewhat retarded project with a lot of downfalls and fails.
Bicycle dynamo, I will be honest I can't be arsed to do the maths here it's far too much effort, but a bicycle dynamo at 12v (we have moved on in the past 3000 years since 6v) will rarely be rated to spin at 30mph, now a bike is going to average around 30mph constantly, add in jaunts of up to 70mph on motorway the likely thing that is going to happen is it will set on fire as the bearings collapse and overheat, that kinetic energy needs to go somewhere, do you want the end of that dynamo flinging around at several thousand rpm?

Then there's all the other gay things that have been mentioned which have already been done.

Magnets and coil on front suspension, not exactly a brilliant idea, how would you secure it? How would you stop it from getting tangled up in the brakes?


Dynamo on the front wheel was mentioned, thing is to be able to withstand the heat, force, rotation it would have to be a cross between an old car generator and a bike one, if you mounted that on the front of a bike you are going to drastically alter the handling characteristics of your bike, now granted if you have a Bandit it probably wont matter as they are shit and ghey, but besides the point. You will be weighting the front end of your bike, the balance would have to be right, you would have to consider different oils, springs etc in the forks.


This is completely besides the point that this is your project, not ours so do it yourself, we're not here to do it for you.

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[dolly3900]

[lihp]

This "project" is sounding a little like a university "project"
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[The Shaggy D.A.]

Magnet on the wheel, induction coil on fork/swing arm.

https://www.instructables.com/id/Magnetic-Induction-Bike-Lights/
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[andyscooter]

[Suntan Sid]

[pits]

[lihp]

The best way of charging from a bike is possibly to use some kind of magentic generator attached to the crankshaft, that then gets passed a rectifier and regulator to keep the power to a usable voltage.
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[Northern Monkey]