Comments on: How to solve for the NUMBER OF TURNS in a magnetic coil..? http://www.magneticgeneratorguide.com/magnetic-generator-q-and-as/how-to-solve-for-the-number-of-turns-in-a-magnetic-coil/ Tue, 31 Jan 2012 03:57:19 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Craigory http://www.magneticgeneratorguide.com/magnetic-generator-q-and-as/how-to-solve-for-the-number-of-turns-in-a-magnetic-coil/comment-page-1/#comment-2522 Craigory Mon, 26 Jul 2010 20:43:42 +0000 http://www.magneticgeneratorguide.com/magnetic-generator-q-and-as/how-to-solve-for-the-number-of-turns-in-a-magnetic-coil/#comment-2522 The problem you will likely have is knowing the permeability of the core material you are using. If you have that number, then the equations are easy to work out. Here is a calculator that will help you out: http://www.ajdesigner.com/phpinductor/inductor_equation.php Now, if you don't know the core permeability, just wind, oh maybe 10 turns of your magnet wire around the core and test for the inductance. Knowing the other parameters, you can back into the permeability. Good luck! The problem you will likely have is knowing the permeability of the core material you are using.

If you have that number, then the equations are easy to work out. Here is a calculator that will help you out:
http://www.ajdesigner.com/phpinductor/inductor_equation.php

Now, if you don’t know the core permeability, just wind, oh maybe 10 turns of your magnet wire around the core and test for the inductance. Knowing the other parameters, you can back into the permeability.

Good luck!

]]> By: yaktur http://www.magneticgeneratorguide.com/magnetic-generator-q-and-as/how-to-solve-for-the-number-of-turns-in-a-magnetic-coil/comment-page-1/#comment-2523 yaktur Mon, 26 Jul 2010 20:43:42 +0000 http://www.magneticgeneratorguide.com/magnetic-generator-q-and-as/how-to-solve-for-the-number-of-turns-in-a-magnetic-coil/#comment-2523 My answer isn't about the calculation of N (number of turns) but just a comment about the invention shown and what you might encounter when trying to duplicate this idea. The product shown is a cute idea.....but I'll bet that electric fan he is using to power his product uses a LOT more power than the LEDs do. The operating efficiency would seem to be quite low. As well, the windbelt could suffer fatigue failure from the vibrations of the belt strip, and the placement of the generating structure (the magnet and coil structure) cannot utilize the full amplitude of the oscillation of the belt. In such a generator, a higher amplitude of mechanical oscillation can translate into a higher operating efficiency, as long as the mechanical limits of the coil and magnet structure are respected. As a generator loads down (as you draw more current from it), the generating element (be it a windbelt or a rotor) produces mechanical resistance - this windbelt loses a lot of mechanical energy by virtue of the placement of the coil and magnet structure at the very ends. A conventional rotary wind turbine has the advantage of being a proven highly durable structure, capable of withstanding a wide range of temperatures, climate conditions while providing many kilowatts of energy. Do try to develop and improve this idea, I hope any of my observations can help you along this path. My answer isn’t about the calculation of N (number of turns) but just a comment about the invention shown and what you might encounter when trying to duplicate this idea.

The product shown is a cute idea…..but I’ll bet that electric fan he is using to power his product uses a LOT more power than the LEDs do.

The operating efficiency would seem to be quite low. As well, the windbelt could suffer fatigue failure from the vibrations of the belt strip, and the placement of the generating structure (the magnet and coil structure) cannot utilize the full amplitude of the oscillation of the belt.

In such a generator, a higher amplitude of mechanical oscillation can translate into a higher operating efficiency, as long as the mechanical limits of the coil and magnet structure are respected.

As a generator loads down (as you draw more current from it), the generating element (be it a windbelt or a rotor) produces mechanical resistance – this windbelt loses a lot of mechanical energy by virtue of the placement of the coil and magnet structure at the very ends.

A conventional rotary wind turbine has the advantage of being a proven highly durable structure, capable of withstanding a wide range of temperatures, climate conditions while providing many kilowatts of energy.

Do try to develop and improve this idea, I hope any of my observations can help you along this path.

]]>