FUELLESS CAR PROTOTYPE by ISMAEL MOTOR

[konehead]

hi Forest
Use high voltage rated caps, and I dont like to make too much voltage in first place, from the gernator coils before they short at peaks to keep voltages down...figure about X20 voltage you get in cap form the short, over some time, and "instantly" you get X3 voltage...you will need to discharge cap periodically too,    The UF value of cap you need to find considering what load you have, and how fast and how high of voltage you will get and need - a high UF value will fill slower, low UF  will fill faster...you will get more power from high UF, lower power from low UF so there is a balance you need to find when choosing the DC cap that collects the ringing created from the short.

[Magluvin]

hi Forest
Use high voltage rated caps

http://www.youtube.com/watch?v=khduXAjvktU     

Mags

[konehead]

hi Mags
those homemade caps are only 1.9someting NANO FARAD so they are way too small to store any power worth anything when they discharge to a load.
the caps that collect the ringing from the peak-short should be polarized, DC type also.
I like to use these HV caps - they are cheap too whihc is nice thing - I have ordered around 50 of them...you can paralell or series them:
http://www.allelectronics.com/make-a-store/item/PPC-273/PHOTO-FLASH-CAPACITOR-270UF-330WV/1.html

flash caps are good ones to use, since they are made to store and discharge power very quick -like what you want to do with caps in coil-shorting circuit,,.. common electrolyctics  are made to STORE power for fairly long periods in most uses for them, so these dont fill up as fast and easily since they arent really designed for that.
here are some HV diodes too:
http://www.allelectronics.com/make-a-store/item/D660/RECTIFIER-DIODE-6-AMP/600-PIV/1.html

[forest]

hi Mags
those homemade caps are only 1.9someting NANO FARAD so they are way too small to store any power worth anything when they discharge to a load.
the caps that collect the ringing from the peak-short should be polarized, DC type also.
I like to use these HV caps - they are cheap too whihc is nice thing - I have ordered around 50 of them...you can paralell or series them:
http://www.allelectronics.com/make-a-store/item/PPC-273/PHOTO-FLASH-CAPACITOR-270UF-330WV/1.html

flash caps are good ones to use, since they are made to store and discharge power very quick -like what you want to do with caps in coil-shorting circuit,,.. common electrolyctics  are made to STORE power for fairly long periods in most uses for them, so these dont fill up as fast and easily since they arent really designed for that.
here are some HV diodes too:
http://www.allelectronics.com/make-a-store/item/D660/RECTIFIER-DIODE-6-AMP/600-PIV/1.html

Thank you, very valuable info. I will try some flash caps. Seems that I need to fight more with electronics to understand how to control those spikes. I have audio DC capacitors like that one : http://uk.farnell.com/epcos/b43456a9478m/capacitor-4700uf-400v/dp/3878170

(you know , I don't want any explosion of it  )

[TinselKoala]

What? I am afraid I don't understand the schematic. When the driver chip's output goes HI, both mosfets will turn on, shorting both coil leads to "source". When the driver chip's output goes low, the mosfets are disconnected from everything except the "ac capacitor" , the fwb and the reservoir cap to the right.  This might allow that cap to charge with DC from current induced in the coils by the rotor motion, but where does any drive pulse to the rotor come from?
Please explain the schematic and what you are trying to do with it.