Quote from: derricka on January 25, 2009, 11:42:44 PM
@ iRon

Do you know what 3D software your Dutch friend Steven is using? Looks like it could be SolidWorks, or Cobalt by Ashlar, but there are a ton of 3D modeling packages out there.

IT'S CALLED SCUMBAGS B-WARE 3D  

T

Quote from: sparks on January 25, 2009, 06:18:04 PMYou could use two torroidal high frequency transformers for this.  Pulse the primary on one.  Feed the high voltage secondary to the primary of the second torroid.  Feed the load from the secondary of number 2  torroid.  Make sure to use a resonant lc setup to feed the pulses into the primary or exciter torroid.   An active element like an avalanche diode in series with the exciter torroid output winding  and the output torroid primary will  help the tendency of the circuit to drift as the core magnetic parameters change.  Active tuning of the oscillator always helps but the circuit should run with gain.

@Sparks,
I like the sound of your idea, is this what you mean? The exciter toroid to manifest the effect, the output toroid for an isolated draw?

edit: In the diagram I don't mean high frequency as in radio HF, but just high for tansformers.

Hi,
It's 3d studio max, with Vray as render engine.

Quote from: derricka on January 25, 2009, 11:42:44 PM
@ iRon

Do you know what 3D software your Dutch friend Steven is using? Looks like it could be SolidWorks, or Cobalt by Ashlar, but there are a ton of 3D modeling packages out there.

Hello Ron

First bravo to you for the magnifique rotor which seams to improve very much the Perepitea effect

Yes this is an original Lynch motor. this one has more than 1000 hours of heavy duty on electric rental gokart.  The modification comes from a german paraglider manufacturer. As you can see they keep only the rotor and the brush older, all the rest including stator magnet are remanufactured so the weight decrease from 11 kg to 7.5kg.

But this are prototype and in Africa we had some problem with the magnets. On one motor the nikel protection covering the neodym magnet delaminated and one  magnet simply exploded during a take off (see picture). The motor did not stop and the pilot could land safely. After that missadventure i noticed that other magnets were no more fixed on the stator and i noticed the delaminations (see  pictures ). I don't know wat happen with this motor and i have to investigate if it comes from a bad gluing or too much heat or bad quality magnet or...  If somebody have an idea.

but  anyway flying magnets are really dangerous  so be very carefull with rotor and don't trust the nikel protection

last word around the drum rotor idea .I enclose a picture of an other electric motor which is called "out runner" as the magnet are glued inside rhe rotating external drum-rotor ...see the ventilated laminated core between the coils

hope this helps

cheers

Laurent

@Yucca

 
      That is the idea.  The torroid high frequency transformers will be arranged so that the impedance of the primaries are low.  The primary on the output torroid will appear as a short to the secondary of the input torroid.  The voltage once it rises above the avalanche diode threshold will conduct a current through the output torroid primary.  The lower the resistance of the ouput torroid primary the better so a rewind to a bigold fat primary and bigold fat secondary (one to one if the voltage gain is too much)  may be necessary in the final design.  The input oscillator should be adjusted to a frequency that allows for the circuit to stabilize before the next exciter pulse is imposed.  The torroid magnetic saturation parameters will be such that it sheds the magnetic polarization of the core at a design frequency.  You therefore only need to maintain the waveform of the input pulse which can appear at intervals of lower frequency but proportional amplitude.
    The whole system can be looked upon as a magnetic amplifier whose bias or supply is provided by the near earth field.   
    Thankyou for the diagram.