by stevie1001 » Thu Sep 20, 2007 4:42 am
Thank you all for your input. Its still a mystery.
Here is some comments from Herman who explains very good why he thinks that serie is better then parallel.
Herman:
Until now I have just tested Series LC since it makes much more sense to me. When using Series LC, the current through the coils when the Fet is on builds up an magnetic field which collapses when the mosfet turns off. this collapsing field induces a current into the coil which has the same direction as the field-producing current. Therefore the polarity at the cell is the same as when the fet is on (without the diode, this current would not find a path to flow and would therefore build up a rather high voltage at the fets drain terminal and would possibly destroy it).
On the other hand when using parallel LC, the same rules here, the magnetic field when collapsing induces a current of same direction into the coil, but this time, the current would (if it could) produce a voltage of opposite direction across the cell. But when using this diode parallel, this current would be clamped completely and the parallel coil would not have any affect at all (besides wasting energy). my experience shows me that applying an AC voltage across the cell doesn't produce any amount of gas when using frequencies higher then a few Herz. Even when putting around 60 Amps at 50 Hz and 70Volts into my cell, it doesn't do anything than producing lots amounts of heat.
Stevie1001:
Thats why Stanley puts a rectifier in the + before the coil. It prevents the voltage going backup and to keep the voltage unidirectional. It actualy cuts the resonance cycle in half!
Runningbare - Its a possiblility that the Bifilair coil is working different.
Do you measure an amp drop when you have a resanance situation?
Br
Steve