Homemade Electric Crank Generator Not Producing Voltage

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Discussion Overview

The discussion revolves around a homemade electric crank generator that is not producing voltage. Participants explore various configurations of magnets and coils, seeking to identify potential issues in the design and operation of the generator. The scope includes technical explanations and suggestions for improving the generator's functionality.

Discussion Character

  • Technical explanation
  • Debate/contested
  • Exploratory

Main Points Raised

  • One participant notes that the generator's layout is unclear from the provided picture, suggesting that more views would help diagnose the issue.
  • Another participant proposes that the induced electromotive force (emf) might be too small to detect and emphasizes the need for strong magnets, large coils, and fast movement to generate a significant voltage.
  • There is a suggestion to arrange the magnets closer to the coils and to orient them so their poles can approach and retreat from the coils effectively.
  • One participant questions whether the magnets should be placed on the edge of the disc instead of the side, indicating that they are already close to the coils.
  • Another participant inquires about the orientation of the magnets, asking if they should alternate poles from north to south.
  • A suggestion is made to reorient the coils to be perpendicular to their current position to improve the generator's performance.
  • One participant recommends inserting an iron rod into the copper coils to potentially enhance the magnetic field interaction.
  • Another participant suggests using horizontal iron cores in the coils and positioning them so that magnets pass through the gap between the cores, indicating that this may lead to measurable voltage.

Areas of Agreement / Disagreement

Participants express various viewpoints on the design and configuration of the generator, with no consensus reached on the best approach. Multiple competing suggestions and hypotheses remain under discussion.

Contextual Notes

The discussion highlights limitations in the provided information, such as the lack of detailed views of the generator's construction and the potential dependence on the specific arrangement of components for effective operation.

Adsr
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This is a homemade generator I've been trying to make using a hand crank, neodymium magnets and two copper coils. It doesn't work. If anyone has any suggestions on how to configure the magnets or something I am doing wrong your comments will be much appreciated.

Thanks!
 

Attachments

  • 2014_03 Generator.jpg
    2014_03 Generator.jpg
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You expect to guess how is supposed to work just from that picture?
Where are the magnets? And what is moving?
 
Unfortunately, the single view of your generator attached to the OP doesn't provide enough detail of the layout to judge why you are having problems. Several views from different angles would give a clearer picture of its construction.
 
Sorry

there's magnets on either sides of the wheel and the copper coils at the bottom are connected with more copper wire running beneath the wheel.
 

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  • Generator 2.jpg
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  • generator 3.jpg
    generator 3.jpg
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I'm in grade 11 and have next to no knowledge on how this stuff works.
 
It probably is working but the emf you are inducing is very small and you are unable to detect it. To get a big voltage you need to get a large rate of change of flux so you need strong magnets, large coil(s) and fast movement.
From the picture it seems you have magnets fixed along the axis of the disc. If so the magnetic field is strongest along this axis and is mainly missing the coils.Also the field seems to be at a fixed and fairly long distance from the coils. Arrange it so that the magnets can move closer to the coils and arrange the orientation of the magnets so that their poles can approach and retreat from the coils.
Try fixing the magnets with the right orientation close to the circumference of the disc.
 
should i put the magnets on the edge of the disc instead of the side maybe... if you look at the first picture they're already incredibly close to the coils
 
Should the magnets be alternating poles from north to south?
 
Adsr said:
should i put the magnets on the edge of the disc instead of the side maybe... if you look at the first picture they're already incredibly close to the coils

I think it would be easier to move the coils. The poles of the magnets should be pointing at the hollow section of your coils like the following:

PF.2014.03.16.1232.ac.generator.jpg
 
  • #10
  • #11
should I reorient the coils then so they're perpendicular to how they are now?
 
  • #12
I would try to stick an iron rod in the copper coils.
 
  • #13
You should do both: put an iron core in each coil and place them so the axis is horizontal and perpendicular to the plane of the wheel.
Each magnet will pass through the gap between the two horizontal iron cores.
Still not the best setup but you may get a measurable voltage.

In the current position the flux through the coils is very small as the field is mostly parallel to the wire loops .
 

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