Re: [EVDL] ADC Surplus DC->AC motor conversion
Gilbert, Brian D (GE Infra, Energy) wrote:
> As far as possible goes though, I think the proper way to convert them
> to BLDC would be to replace the field coils with magnets and change the
> case so that it is the part that spins (an "inside-out" BLDC or
> "outrunner").
"Brushless" really just means replacing the mechanical commutator with
some electronic equivalent. You can leave the series field in place, or
replace it with permanent magnets; this affects performance of course,
but is not related to brushed/brushless.
Unless you want to have slip rings, it works out better to have the
coils sit still, and let the field spin.
> I understand the desire to design the perfect EV. I've spent months
> dreaming. But after reading a few hundred EVDL posts I've come to grips
> with "the perfect is the enemy of the good". A working EV on the road
> is worth way more than a perfect EV on paper.
My compliments, grasshopper. You have learned well.
--
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
Gilbert, Brian D (GE Infra, Energy) wrote:
> As far as possible goes though, I think the proper way to convert them
> to BLDC would be to replace the field coils with magnets and change the
> case so that it is the part that spins (an "inside-out" BLDC or
> "outrunner").
"Brushless" really just means replacing the mechanical commutator with
some electronic equivalent. You can leave the series field in place, or
replace it with permanent magnets; this affects performance of course,
but is not related to brushed/brushless.
Unless you want to have slip rings, it works out better to have the
coils sit still, and let the field spin.
> I understand the desire to design the perfect EV. I've spent months
> dreaming. But after reading a few hundred EVDL posts I've come to grips
> with "the perfect is the enemy of the good". A working EV on the road
> is worth way more than a perfect EV on paper.
My compliments, grasshopper. You have learned well.
--
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
