Linear Generator Efficiency: Air Core vs Metal Core and Optimal Core Shape

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#1 21661350 26 Feb 2012 09:50

Terry Ford Terry Ford

Anonymous

Post #1
21661350 26 Feb 2012 09:50

I am interested in making a Linear Generator. My first experiment is similar to the Magnets shaken through a coil in the Generator Torch: http://www.youtube.com/watch?v=DC-DKSOdwKw

I would like to know if it would be more efficient with a metal core, as is usual in most Generators? If so, please let me know what shape it should be, please.
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#2 21661351 26 Feb 2012 11:25

DAVID CUTHBERT DAVID CUTHBERT

Anonymous

Post #2
21661351 26 Feb 2012 11:25

Terry,
I believe the linear generator shown uses a permanent magnetic for the moving portion. The stator, or coil, looks to be many turns of thin wire. The coil is likely connected to a super capacitor or rechargeable battery though a bridge rectifier composed of four diodes. Using a bridge rectifier rather than a single diode allows it to charge the battery when the magnet is moving in either direction.
#3 21661352 26 Feb 2012 12:55

Terry Ford Terry Ford

Anonymous

Post #3
21661352 26 Feb 2012 12:55

Thank you David,

I have made the coil and permanent magnets, and rectifier, and it works.

Here is my question: "I would like to know if it would be more efficient with a metal core, as is usual in most Generators? If so, please let me know what shape it should be, please."
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Linear Generator Efficiency: Air Core vs Metal Core and Optimal Core Shape

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