Hi Mariu
Are you pulsing your single motor coil with the two "bidirectional" connected mosfets?
they work great to pulse motor coils with too....I think high internal resistance of transistors kills lots of the bemf you can capture, jsut like with coil shorting its a similar thing.
can you try this out?
put a 2nd bidirectional mosfet switch onto just one of the AC legs of FWBR, the connects-disconnects tha tAC leg between the coil, and the FWBR - and with AC legs of this FWBR across the two DRAIN (switching) leads of the motor coil bidiretional mosfets...
Now fill up a big uf cap with DC out of FWBR....
thne find sweet spot in timing of that new 2nd switch on the FWBR so that it turns on-off about 5 degrees RETARDED as compared to the motor coil pulse....(like and ECHO).....have a bit of overlap in the ON-TIME of this 2nd swtich, with the ON-TIME of the motor coil pulse, jsut "BEFORE", and right "AT", and then jsut a bit "AFTER" the time the motor coil swtich OPENS (turns OFF)....so this 2nd swtich is times to catch the backemf RECOIL SPIKE for sure.... add another hall effect to controls this 2nd switch and drift it around abit until you find that sweet spot....this is the best way to take backemf out I think you will see dramatic speed up when you find sweet spot, and you are now filling "larger size" uf size cap without any lugging, and instead speed up.
Also another good thing about this technique, is that it becaomes very simple "two stage" output circuit for the backemf cap...since when that 2nd swtich is OFF, the backemf-cap is also now disconnected from the motor coil circuit...so anytime during the OFF period of the new 2nd swtihc, is when you can dump the cap to a load....

Quote from: FreeEnergyInfo on January 20, 2012, 02:30:25 PM
OK ,
SORY MY ENGLIS == GOGLE TRANSLIATE ....
PLYZ POSTET SHEMATIC CONECTED ...
R=?.....
AČIU LABAI JUMS , BET AŠ ANGLIŠKAI NESUPRANTU,GAL JUS GALĖTUMĖTE IDĖTI BRĖŽINI BANDYMO ....
ANTANAS.
LITHUANIA

This is the circuit. Now you have to try different cap size to see wich works best

Quote from: konehead on January 20, 2012, 03:53:33 PM
Hi Mariu
Are you pulsing your single motor coil with the two "bidirectional" connected mosfets?
they work great to pulse motor coils with too....I think high internal resistance of transistors kills lots of the bemf you can capture, jsut like with coil shorting its a similar thing.
can you try this out?
put a 2nd bidirectional mosfet switch onto just one of the AC legs of FWBR, the connects-disconnects tha tAC leg between the coil, and the FWBR - and with AC legs of this FWBR across the two DRAIN (switching) leads of the motor coil bidiretional mosfets...
Now fill up a big uf cap with DC out of FWBR....
thne find sweet spot in timing of that new 2nd switch on the FWBR so that it turns on-off about 5 degrees RETARDED as compared to the motor coil pulse....(like and ECHO).....have a bit of overlap in the ON-TIME of this 2nd swtich, with the ON-TIME of the motor coil pulse, jsut "BEFORE", and right "AT", and then jsut a bit "AFTER" the time the motor coil swtich OPENS (turns OFF)....so this 2nd swtich is times to catch the backemf RECOIL SPIKE for sure.... add another hall effect to controls this 2nd switch and drift it around abit until you find that sweet spot....this is the best way to take backemf out I think you will see dramatic speed up when you find sweet spot, and you are now filling "larger size" uf size cap without any lugging, and instead speed up.
Also another good thing about this technique, is that it becaomes very simple "two stage" output circuit for the backemf cap...since when that 2nd swtich is OFF, the backemf-cap is also now disconnected from the motor coil circuit...so anytime during the OFF period of the new 2nd swtihc, is when you can dump the cap to a load....

Hi konehead
right now i'm pulsing the coil with the two bidirectional mosfets. Is hard to me to visualize what you just asked me to try.Can you draw a circuit?
Thanks

Quote from: mariuscivic on January 21, 2012, 04:30:03 AM
This is the circuit. Now you have to try different cap size to see wich works best

THANKS THANKS THANKS...

Hi Mariu
In the top picture on this page from my site, is the circuit wtih a "AC leg of FWBR 2nd swtich"
http://sites.google.com/site/alternativeworldenergy/pulsed-dc-backemf-recoil-recovery-circuits
in the photo below it, you see 4 brushes, but  this a double-pulse thing going on, you only need 2 brushes really to show concept....this is a bit confusing with the 4 brushes...also circuit of it is underneath photo.
simple experiment I like to do for fun sometimes is run DC pulse motor on 24V and dump DC side of FWBR directly into battery bank of 12V batteries in paralell - no caps at all...batteries for sure get a good charge, and you can get a speed up if you find timing sweet spot, with that AC LEG 2nd switch...
This particular circuit shown at top of page has the AC legs of the FWBR across the motor coil swtihcing itself...not across the motor coils, but sometimes the AC legs work a little better across the coils, rather than the motor coil switching as shown, so experiment with where to stick the AC legs of the FWBR.
functions of S1 and S2 in this simple drawing is what I was trying to explain...S1 is your switch that drives the motor coil pulsing, and S2 is the swtich that connects the backemf/recoil into a cap...
the timing of it is S2 is about 5 degrees retarded to S1 - like an "echo"
since S2 is on AC leg of FWBR, you should use a bidirectional mosfet there, if using mosfets, since it is switching a spikey AC (sort of)  as this switch connects the FWBR..