Pedal Generator

Building a Pedal Generator out of bike parts and an alternator from a wind turbine.

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[natebaird]

It's cool to see that you built this and that you're able to hit peak RPMs for the alternators/generators that you're using. One thing to note though is that you won't really be able to hit those metrics when the system is under loads that you'd want to charge the battery. If you're charging a 48v battery, you need at least 20v above the fully charger (generally 58v) feeding into your mppt. You'd have a pretty tough time even charging at 5 amps (~250 watts) for any reasonable amount of time. Assuming you're able to ride at 250 watt pace for an hour, you'd be very tired and it'd likely take much more of your resources in way of food and/or money to buy food to make up for the expended energy. That amount of effort would charge your 5kW (100ah) 48v battery to 1/20 of it's capacity, not accounting for loses. It's a useful thought experiment and certainly a decent way to learn about motors and electrical theory but, from a practical standpoint, you'd be way better off just picking up even a 50 watt solar panel and allowing it to do that and more each and every day without any additional effort/resources being required. Best use cases for a bicycle generator might be charging small battery banks that could top off phones, tablets, and laptops. A half an hour at a decent pace a day could keep each of those devices topped off and ready to go.

[andrewbenson]

Just think of all those wasted watts//amps/volts, at the fitness gym. Love the way you take existing ideas and make them fresh and see them through a different lens.

[victoryfirst]

SO nice to see you back on YouTube Sir. I thought that you would not do videos again. You made my day fella for sure.

[valveman]

Peddle generators are a great thing to have around when there is a power outage.
Adding a capacitor bank will allow charging of the bank to run lights, charge phones, and even connect to an inverter.

[jbcom]

This is exactly the content i was looking for

[drsatan]

I suggest you try again with 4 tri coil axial Flux motors. Combine them all on one shaft but instead of wiring them directly together in parallel wire them all to a circuit board and make them parallel within the circuit, this will reduce the likelihood of the motors overheating with the high current from parallel connections

They make cheap, low RPM generators and pretty easy to diy with lots of different 3d printed designs out there to copy from

[Quickened]

Keep going man, one day, that generator is going to pay for itself!

[agentp]

I recently bought a stationary bike with a flywheel at thrift store for $8. I have been pouring over all these videos on YouTube. It seems an alternator is the path everyone is going. It doesn’t appear to be very efficient. Then I saw the electric motors. Now I see your wind turbine alternator and I’m curious about this. I believe that as you put it under load. The alternator becomes harder to turn. Something that I’ve seen people do is using a car audio capacitor to help smooth out the output to the battery. Because pedaling will have an uneven output. The capacitor will create a smooth output while receiving the input in whatever form it’s coming in. My hope is that the flywheel will also help maintain a more steady output as well. I’m considering attaching a gear mechanism to boost rpm. With gears that you can steadily increase with the added benefit of maintaining momentum with a flywheel.

[jacquesdubord]

Your pedal generator is interesting, but the first thing I would do if I was you is to go to a gim and using a there pedal equipment with its computerise features you could know much power you can produce while pedaling as fast as you can and also how much watts/hour .Then you'll be able to choose your appropriate alternator. Good luck.

[RaksasaMentawai]

Awesomeness, I have just ordered a bunch of neodymium magnets to convert a washing machine motor into a 240v generator. More volts/amps ⚡️ I found the video on YouTube, will link shortly. Ok, his YouTube name is MR COVER 🤙

[PhilippHager-dmyt]

Try to get your hands on a used Indoor-bike with flywheel and attach an e-bike motor or a hoverboard-motor to it. We did so in my workshop at an university here in germany.

[Bauerofficial]

have you tried with second hand hoverboard motors? they are built solid for low rpm and are cheap to get.

[Felix_Fausto]

I'm planning to build a pedal generator using a recumbent trike as a base model (comfort and free hands). It will have a table in the place of the handlebar so I can use a notebook and a fan during the exercise.

[miorieser]

Danke für die Infos. Sehr hilfreich. 💕

[grahamwilliams]

Hi, good work sir….but you need to go back to basics. The limit of any pedal generator is the person pedalling NOT the rating of the alternator. The average person can produce more like 100w over an hour or so. If its a 48v system that’s a current of 2 A. The efficiency of a alternator or dynamo system is likely to be around 50% so even if your moderately fit and can sustain about 150w for a long period you’ll be lucky to put out 75w at the battery terminals. Thats 75 w/hr. The voltage you are generating in the video is the NO LOAD voltage. It’s doing no work. As soon as you connect a load you’ll quickly grind to a halt. So use a generator rated for more like 300w at 1000 rpm or less. If, as in your vid you harness a 10 kw alternator you’ll need to produce about 20 kw. A top athlete can produce about 1kw for a few minutes. So, start off with the ability of the human input and size everything accordingly, and don’t forget every time you add something - like an inverter or phase converter - you introduce yet more loss….

[deslomeslager]

Do you think you can generate more than 1 horse power? That is almost 750 Watt. Only heavy trained people can.
This means you can start looking for smaller generators. With a 1kWh output or even less.
I am using an e-bike on a stand. The 250 Watt motor will generate the same (in my case). And I can tell you: 250 Watt output is very hard to do. Proof is on my channel.
Please look out for an e-bike. No more work to do, and you can still use it as an e-bike if you put a decent plug on the wires. (this is a note to readers, who are like me with two left hands).

[matthiaswilhelm]

Den habe ich schon vor 20 Jahren gebaut.Der drückt 52Volt DC mit 2, 5Ampere.Greatings From soylent Green.Schmier dir dazu ein Schmalzbrot mit Gurke.😂😂😂💖

[spongeimperium]

Do you think a bike hub motor would work?

[m-j]

You can just use an old wiper motor for $5, it produces 20 volts at hand-crank speeds.

[albertleffler]

I learned that a 160 tooth front ring can move a bicycle at 30 mph at 90 watts. This is walking pace. Instead of using the fast twitch muscles on the top of the thigh, use the slow twitch muscles in the hamstring.