Re: Regen (again)

[Glubrecht Dale D <GlubrechtDaleD@JDCORP.DEERE.COM>]

It seems that for road controllers the cost seems more affected by peak
current then peak KW. A 30KW industrial drive puts out about 100A.( Of the
top of my head.) With any reasonable pack voltage 100A is just too light. I
am sure it could be done but lets stay to the practical not the exceptional.
I would say one needs at a minimum 150A. Most IGBT's ar $/Amp because most
are rated for 600V.


EMS controllers makes a nice controller and motor package for a decent
price. Bob Gruenwald is the guy for that. Brusa makes a nicely integrated
package if you have a light car and pack. There are those on the list that
actually have installed them in conversions and like them too. EMS is the
only AC controller that will please the "tire smoke Boys"  An AC motor can
be had for cheap if you want surplus. the rewind will cost $500-700.....
*****************************
Dale Glubrecht
My Porsche Would Be Zero Emission
But My Tires Keep Smoking...
John Deere WC&CE div.
(920) 485 5734
mx10273@deere.com
*****************************


Whoops gotta go.


> -----Original Message-----
> From: Art Mander [SMTP:ARTMAN@TRISTATEGT.ORG]
> Sent: Thursday, April 30, 1998 1:32 PM
> To:   Multiple recipients of list EV
> Subject:      Regen (again)
>
>
>      When I bring up technoid AC motors with regen, some folks make the
>      leap to 150kW AC drives costing $30K plus.  Is there nothing
>      in-between?  Take the 400 Hz 25 kW generator for $195.  Power it with
>      a comparable sized three phase variable freq AC inverter, with 25 kW
>      continuous rating and maybe 75 kW short term rating.  Dale, how much
>      would this cost?  Not $30K I hope.  An industry standard 30 hp 60 Hz
>      variable frequency inverter is only about $5,500 and it includes a
>      rectifier section that wouldn't be needed in a battery EV.
>
>      As stated in several posts yesterday, EV conversions aren't catching
>      on very well.  Wouldn't regen give EV another edge over IC?  Diesel
>      school buses used in the foothills and mountains around here have a
>      "retarder" for extra safety.  Its a shunt wound DC motor mounted on
>      the output of the transmission and connected to a big resistor.  In
>      reality a dynamic braking system.  Now wouldn't it be great if more
> EV
>      could brag about the added safety and energy efficiency of regen?  It
>      sure wouldn't hurt our cause.
>
>      Art Mander, Denver
> Regen (again)
RE: Regen (again)