Re: [EVGRAY] Samsung motor

Body

Bob,

I presented the resolution a few posts back to stop the spike from
backfiring, a common mode filter, just switch one rail out of the
circuit until its needed or wire accordingly, passes differential
current opposes common mode.  Torroid with two wires on opposing sides
wound in opposing directions

On 3/26/2019 5:30 PM, Bob Paddock [email protected] [EVGRAY] wrote:
>  
>
> > EMF, our old problem buddy can shoot back into the controller, and
> kill the brains,
> > A schottky diode might protect the gate drivers, but then squelch
> the position signal. Hmmmmm?
> > Ideas? ( Doug. I love your mechanical solution, but this sucker is
> way up in RF frequencies)
>
> Optic Gate Drivers are the general solution today.
>
> Bodo's Power Magazine out of Germany will give you some ideas if you
> pursue the archives.
> The magazine is free and anyone on this list will probably find it of
> value.
>
> https://bodospower.com/
>
> You will also find the application notes here of interest:
>
> https://unitedsic.com/downloads/
>
> United's parts are an interesting Cascod that gives it some unique
> properties.
> The start at 650V and are now available from DigiKey.
> Use the four terminal devices to minimize false triggering.
>
>