Zen Generator - A No Back Torque Electromagnetic Generator

[tru168]

Hi,

  The voltage drop from 0.7 volts to 0.3 volts when loaded, I think you will need to wind another similar coil at another side.
I think the magnetic filed in the toroid run tru the shortcut when the coil connect to load, let say, your winding is place at left site of the toroid, when you turn the magnet at its center, the N and S magnetic field will go tru right site of the toroid when you load the coil. By wind another set of similar windings at right site, and series the 2 coils together, you will find that it will not drop the output voltage when loaded.

I tried the similar ideas few years back, I used small c core with 120 turns of SWG21 magnet wire on each site and I get 1.8V at 0.59 ampere. Yes, that is with load, and when unload, I get nearly 2 volts .  I also using a drill to spin the center magnet too.

(Sorry for my poor explaination, I seldom speak english! )

  Just my 2 cents!

Regards,
EW

[gyulasun]

Hi EW,

Thanks for the very interesting info you gave, this is good news!

Can you remember if you checked the current draw of your drill : did it increase much when you loaded the output coils (1.8V/0.59A) ? Maybe you still have got the setup?

I think it would be good to look for the smallest power electric motor used in RC toys just enough to rotate the center magnet, this way keep the input power need at the minimum possible.

Thanks again,

Gyula

[tru168]

Hi Gyula,


  I didn't measure the current of the drill, as what you say, I should use smaller motor to test it out.
  I can feel that the RPM of the spin motor will be the same, with or without load.Thats means the load will not increase the current of the drill so much .
  I stop the experiment for quite a long time, thinking that it might not work.

   I still keep those c core ( rated 64 watts and spec sheet says saturation at 1.6T, M5 grade silicon steel) and some spare copper wires. The inductance of the 120 turns per side seems lower than I would like to continue the experiment, thats why I can only get less than 2 volts. Bigger cores and more turns will solved the problem.
I will try again to build proper one and see how it goes.

Normal RC model motor might not give you good efficiency, for example, Speed 540 type RC plane motor will never exceed 50% of efficiency. I will suggest to use RC type brushless motor which will have high torque and can directly drive the center magnet, and its efficientcy will reach 90++% its a bit expensive , and need to build a speed controller for the motor but I think it worth to invest a good motor for above mentioned project..Need to plot out the current draw VS spinner magnet weight and get the most efficient working point first,then only go for next step, that is, the output coil.
    The mentioned setup loves high RPM, the higher the RPM, the higher the efficiency. I will not allow the setup to run anything lower than 3500 RPM or efficiency will drop greatly. Again, just my humble opinion.......


Regards,
EW