Igors switcher (EMF recycler2)

[hartiberlin]

Dr.Spark,
looks good.
Yes, don?t use too many windings on the core.
Then you can go to higher frequencies and still have
a good and fast current rise in the coils
and a good power transfer.
Looking forward to the scopeshots.

Regards, Stefan.

[drspark]

Hi People,

Scope shots of the circuit running in photo
FETs get hot now, from the top down Q3 real hot Q4 hot Q5 warm,
adding 50k like Gyula sugjestion helped but did not fix

drspark

[drspark]

Igor

On paper/drawing/sim, Convert your circuit to 4 or more FETs and I will build it.
Must be solid state to make 20khz and beyond.

drspark

[drspark]

Hi People,

I have moved the R1 measurement point back to a series resister with the source. A DC value, 0.4v across 1ohm is observed at 9.95v.

An observation that I dont understand:
I have the wire from the D1 that feeds power to the cap bank top C1, in hand. When I touch it to the top C1+ the circuit charge and run, BUT when I disconnect it, the circuit surge in output before it discharge and die, when I touch it to the top of C3+ cap the circuit charges and runs... and when I disconnect the circuit discharge no surge and dies.

This is behaviour inline with original reed relay circuit, where power was only connected every so many cycles, for one cycle.....

No idea what this is doing to the FETS.... Tapping the wire as fast as I can results in a erratic mostly continious surge!

A counter chip can controle a relay to do that to this once every 5000 to 10000 cycles for x cycles
(surge lasted 1/4-1/2 second)

drspark

[mhackgyver]

I have done your "EMF recycler V3", but what is ?.ic? ?