Re: 1-O-X revolutionary digital EV motor)

[Victor Tikhonov <vtikhono@lsil.com>]

It was said that EV1 looses half of the range due to this single digit
efficiency with stop-n-go operation. This means half of the range
distance
(~80 miles) it goes at below 10 mph, which is obviously not the case
(unless we're talking average speeds in suburban driving, running
errands 
all day long at 25 mph max).

Victor

Roger Stockton wrote:
> 
> ...and it is only achieved at the very top of the 0-10mph range.  The
> original mention of single-digit efficiency only observed that such
> operation points exist, and I don't think that is disputable given that
> we know efficiency at 0RPM is 0 and the efficiency plots you've pointed
> out both show efficiency plummeting below ~1000RPM.
> 
> Consider the AC Propulsion graph; they don't even bother showing what
> happens below 1000RPM and yet if you look closely at the tightly spaced
> lines in that area you will already see numbers like 63%.  Just like a
> cliff on a topographical map, the closely spaced efficiency lines in
> this area tell you that efficiency is falling like a rock and could
> easily be in the single digits by about the 200RPM mark.
> 
> Cheers,
> 
> Roger.
> 
> > -----Original Message-----
> > From: owner-ev@listproc.sjsu.edu
> > [mailto:owner-ev@listproc.sjsu.edu] On Behalf Of Victor Tikhonov
> > Sent: October 30, 2001 8:13 PM
> > To: ev@listproc.sjsu.edu
> > Subject: Re: 1-O-X revolutionary digital EV motor)
> >
> >
> > Sure, but 70% is far better than the single digits quoted in previous
> > mail.