Re: [EVGRAY] Gary Porter looper ready to bideo lnk

Body

Hi Machinatous and all, 
From what I understand, to 10kw for something like Hector's brushed dc motor WYE rewind with the added brushes, H proposes not just one "extra" brush (besides the existing "primary" brush that feeds current into motor winds)
But there is two extra brushes.
One brush connects a steering diode , or a halgbridhe or full wave bridge that steers out and recovers the flyback spike in a delayed timing fashion, into caps.
My experience is this brush should have same pulse width to tbis "connection" as the primary brush has for its connection to feed dc current to tbe motor winds....so let's say 2msmotor pulse, so also 2ms to the time the backemf/flyback recoverybrush will be connected.
However you pu a little bit of delay time in this second "recovery" brush's timing...about 5 degrees retarded, like an echo to the primary pulse.
There should be a bit of overlap in timing where both primary pulse and recovery of backemf/flyback happen at same time. Too.
Sequence like this for swirching:

Primary pulse only closed / 
primary pulse AND recovery connection  both closed/
Primary pulse opens (backspike mamifest)/
Recovery connection opens/

That is function of the "2nd brush" but now there is 3rd brush too, and the purpose of this brush is to sort circuit the motor coil " into itself" so simply pit conne t the two leads of the motor coil together.
This shoul probably happen after the second brush does its job, and the motor coil and core are still excited a bit from the initial motor coil pulse, and this would be at " sinewave voltage peak" period if you were to spin motor by hand and see where rotor magnets will induce maximum voltage...
So this shorting event from 3rd brush has the hyper ringing it creates have this power extracted by fwbr AC. legs across the motor coil, with dc into unloaded cap. ..so it goes; , power input,flyback recovery, short...
Kone