Build a Home-Made Generator: Get Answers Here

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SUMMARY

This discussion focuses on building a homemade generator capable of producing electricity to power a small fan and bulb, with a preference for AC output. Key considerations include the required strength and size of magnets, as well as the necessary RPM for effective operation. Participants suggest starting with a small DC motor as a generator and studying automotive alternator designs, which typically produce 3 to 4 phase AC converted to DC, with outputs of 100-150 amperes at 13-15 volts.

PREREQUISITES
  • Understanding of basic generator design principles
  • Knowledge of magnet strength and sizing
  • Familiarity with RPM calculations for generators
  • Experience with DC motors and automotive alternators
NEXT STEPS
  • Research the design and operation of automotive alternators
  • Learn about magnet specifications and sourcing for generators
  • Study RPM requirements for different generator types
  • Experiment with small DC motors as generators
USEFUL FOR

This discussion is beneficial for hobbyists, DIY enthusiasts, and anyone interested in renewable energy projects, particularly those looking to build their own generators for small-scale applications.

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hey i want to create a simple working generator that can be used to produce electricity so that i can operate a small fan and a bulb. power produced should preferably be ac in nature but dc can also be made to work.

i just wanted to know how much powerful and what size of a magnet is required to fulfill the criteria ? and also the rpm of the generator needed be produced .
can anybody help..?
 
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shubhranshu_s said:
hey i want to create a simple working generator that can be used to produce electricity so that i can operate a small fan and a bulb. power produced should preferably be ac in nature but dc can also be made to work.

i just wanted to know how much powerful and what size of a magnet is required to fulfill the criteria ? and also the rpm of the generator needed be produced .
can anybody help..?

Welcome to the PF.

What research and reading have you done on your own so far?
 
What source of energy were you planning to use to operate it? Hand crank? Wind? Water? Hamster wheel (my favourite)?
 
i just wanted to know these facts so that i can get my head straight and i have ample data before i really dive into this project...
 
Nowadays, the magnets you can buy cheaply are really impressive. It will be easy to produce a strong enough field if you can make yourself a reasonable 'yoke' to rotate your coil in. Have you found information about the basic design of a generator? If you do not specifically need DC (and your applications don't) then and alternator (AC) is the easiest to make.
We like to help but I don't think anyone here will provide you with an actual design so, as berkeman has asked, what do you know so far? Which sources have you used? Spoon feeding is not in our nature - it's not good for you. :smile:
 
Perhaps just try using a small DC motor as a generator first.
 
You could study the design of automotive alternators. A typical alternator produces 3 or 4 phase AC which is converted to DC internal to the unit. Typical DC outputs are 100 - 150 amperes at 13 - 15 volts
 

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