Pulsing A Bifilar Coil And Collecting From It And Various Ways Of Going About It

[Magluvin]

This thread is for as the topic states. We are not necessarily looking at resonance, but it is not excluded. The reason I am putting it here is some of what I have ideas for, the timing of the coils resonance may be an indicator of the timing for the switching...... So in my book, we can see the effect of resonance in the very first peak of the output, 1/4 of a sine wave, even if we kill it off at peak to collect from it.

Will put up some circuits I plan to try later tonight.


Mags

[Magluvin]

Here is the first circuit to test.  It will need to be expanded upon as to how to get it to have a continuous pulse train. So loading the caps should work. Basically a switching supply but testing if there is any advantage collecting from the 2 coils if they are wound bifi or if it were a typical transformer winding. So if a typical tranformer winding is made in comparison, its probably best to not have 1 layer for one winding and the other winding on top as it is as close to being bifi as it gets without winding 1 and 2 side by side. Ive almost got my new bobbins going.  I have issue with thin wall bobbins where the pressure of winding the wire pushes out on the wall and the winding loses its form, messes with you wile winding. ugh  1/4in plexi walls on plexi tube.

Mags

[Dog-One]

Some concepts shown in the attached application note.

I took this a step further using a microcontroller and state machine to effectively
charge multiple caps while only a single cap fires.  This gives more time for the
capacitors to come up to full charge and subsequently allows faster firing rate.
The only real drawback is that it takes a lot of isolated switching circuitry and
drivers.

[tinman]

Here is the first circuit to test.  It will need to be expanded upon as to how to get it to have a continuous pulse train. So loading the caps should work. Basically a switching supply but testing if there is any advantage collecting from the 2 coils if they are wound bifi or if it were a typical transformer winding. So if a typical tranformer winding is made in comparison, its probably best to not have 1 layer for one winding and the other winding on top as it is as close to being bifi as it gets without winding 1 and 2 side by side. Ive almost got my new bobbins going.  I have issue with thin wall bobbins where the pressure of winding the wire pushes out on the wall and the winding loses its form, messes with you wile winding. ugh  1/4in plexi walls on plexi tube.

Mags

Mags

Try using your BPC in a Joule Thief,and see what happens.


Brad

[Magluvin]

Mags

Try using your BPC in a Joule Thief,and see what happens.


Brad

Well a typical JT doesnt collect from both coils as one is only a trigger.

Will be working on it this weekend

Mags