Q&A for How to Build a Generator

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What are the magnets for and how do I use them?

Community Answer

When a conductive metal passes through the magnetic field you create with the magnets, a current is produced in the metal that can be used to power appliances.

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Question

I want to make an object of a simple AC power generator. How can I do this?

kazuza9

Community Answer

Your best bet is using a lawn mower engine and an alternator to charge a battery to power an inverter.

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Question

Do alternators rotate either way?

Community Answer

Typically, alternators only rotate one way so be sure to check that before installing it.

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Question

How do I build a 240v generator?

Community Answer

You could add a power inverter to this generator to convert the 12volt output to 240 volts.

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Question

Why is the current so low in my generator with a 40-ohm internal resistance, producing 200 ACV, but only 0.011 amps?

Amir Gh

Community Answer

The low current could be due to several factors: 1) Internal resistance limits current based on Ohm's law (I = V/R), so at 200V, the current should be 0.005A rather than 0.011A. 2) Ensure accurate measurement and correct multimeter settings. 3) Without a significant load, the current will be low. 4) The generator might not be capable of producing higher current despite the large wire gauge. Consider checking the load and internal components for improvements.

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Question

Can I use a 100-horsepower car engine to generate a lot of electricity for an EV conversion as a backup generator?

Amir Gh

Community Answer

Yes, a 100-horsepower car engine can generate electricity, but you'd need an efficient generator. It can produce up to 75 kW, but losses will reduce output. Make sure the generator matches your voltage and current needs.

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Can a kinetic flywheel reduce the size of the engine needed?

Amir Gh

Community Answer

Yes, a kinetic flywheel can help reduce the engine size by storing energy and releasing it when needed, smoothing power demands and allowing for a smaller engine to handle peak loads.

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