Home » Public Forums » GMCnet » Re: [GMCnet] Electric motor converision
| Re: [GMCnet] Electric motor converision [message #328637 is a reply to message #328635] |
Fri, 26 January 2018 18:52   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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We had a Europian manufacture of motors visit us to see if we could install
them on each wheel.
We realized that were limited to the diameter of the rear wheels so they
went back without going futher.
Eventually they will come up with a more compact unit that can be adapted
and we might have a coach that can run on battery , Like Jim H says, the
amount of batteries will be challenging should one want to try..
On Fri, Jan 26, 2018 at 2:13 PM, Bruce Hislop wrote:
> So just looking at the Proterra specs for their smallest unit - 35ft. It
> can go 55-72miles on 94-126Kwh of energy.
>
> So we'll say that's 63 miles on 110kwh of energy, so that's about an
> hour's driving. So you would need a generator capable of at least 110kw
> continuous to keep up with the energy demand if you like hybrid. That's
> equivalent to 20 Onan's putting out near full rated power.
>
> One HP = 746 watts, so 110kw/ 746 watts = 147hp is the electrical
> equivalent steady for an hour for their electrical consumption.
>
> A 100AmpHr 12V battery = 1.2kw so you would need about 100 batteries to
> drive an hour at this rate, but actually more. Lead acid should not be
> taken
> below 50% charge and li-ion below 80%. so even Li-Ion will need about 125
> batteries. At about 40lbs each that's 2.5 tons to add. 100Amphr batteries
> are going for ~$750 each so that's about $94,000 in batteries, plus
> chargers and battery monitor systems.
>
> My sister recently bought a VW Golf EV. She took a pic of her power
> consumption to send me. It was 27.2Kwh/100km, so thats 27.2kwh for 63 miles
> or
> about 1/4 of what this bus does. Her diesel VW likely got her 45mpg vs a
> bus at likely 5-6mpg, so I don't think she is doing very good with it.
>
> EV get better city than hyway because they regenerate to charge the
> batteries while braking with little wind resistance. We do mostly highway
> with
> little braking and high wind resistance, so its mostly just a continuous
> load.
>
> I'd say their record miles on a charge was likely at slow speed, no more
> than 25 mph where the wind resistance is still low and only against rolling
> resistance.
>
> Just my farmboy mechanic, 45yrs in electronic technology way of seeing it.
>
>
> --
> Bruce Hislop
> ON Canada
> 77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
> Hubler 1 ton front end
> http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
> My Staff says I never listen to them, or something like that
>
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--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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