Re: [EVGRAY] Re: Arduino controller

Body

Kone,

What have you found to be good gate drivers?  

I am looking for a really fast optocoupler MOSFET gate driver in one
piece that may be recommended by the people here who have hands on
experience.

If the data going in and out of the arduino to the gate drivers is not
decoupled (optocoupled) then there will be issues.   Also the
optocouplers-gate- drivers-mosfet need to be fast without ringing so
need some type of snubbing cap and load like a simple zobel network to
impedance match the circuit just like a transmission line.  In order to
attain really fast performance a hex inverter chip can be used as a flip
flop it can switch nano fast but then needs the impedance matched
decoupled gate driver setup.  Also in the case of issues with coil
spikes causing problems in electronics it may be interesting to use
differential balanced input just like a balanced mic cable works to
annihilate common mode noise.  This could likely be accomplished very
simply and passively with pulse transformers.  So try the following
where a one way valve is needed and can be thought of as the check valve
on a hydroxy gen going to a motor.

Image result for balanced line transformer to stop common mode noise



On 3/25/2019 10:09 AM, [email protected] [EVGRAY] wrote:
>  
>
> Hi Warren
>
> In Germany the very accomplished engineer there was using arduion to
> short coils, it seemed always messed up from something or other, and
> never seemed to be a short enough pulse too. It never got finished and
> working well...moslty my fault actually as I was always leaving lab
> early to help wife cope iwith this and that in germany.... Hall
> effects with trigger magnets on disc on shaft of motor or generator I
> think still best way to control mosfets either bidirectional and
> parallel for shorting, or just single mosfet for pulsing in or out the DC.
>
> Did you see my second youtube video poste d...you could make AC from
> alternating DC pulses I ran both a rotovertor motor with it and also
> one of my DC motors with the NSNS rotors and four coils each
> side...anyways its so simple two trigger magnets at 180 degrees on rim
> of disc on shaft, then two stationary hall effects at 90 degrees to
> control H switcher or even better I think two independent power
> supplies and single mosfets for each, DC pulse direction...you can
>  recover backemf/recoils into caps too,...
>
> anyways don't want to distract you sorry!
>
> but if problems hit too hard with arduino, give this a try with your
> Samsung....pulse width can be adjust by making a tight row of 3 or 4
> trigger magnets instead of just one out on rim, or put 3 or 4 hall
> effects in tight row to make more pulse width..... also there is
> another arduino-like product cant remember the name but it is supposed
> to be much faster switching...the engineer in Germany wanted to switch
> to that but never finished it.
>
> https://www.youtube.com/watch?v=cL2G9W80_9Q
>
>
>