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Discussion Starter #1
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Hello Darin,

Here is a formula that you can find what the mph is at the rpm of a motor at
different overall ratios (transmission ratios times axle ratio) using
different Wheel circumference (WC).

To find the WC, put at mark on the wheel and floor and rotate the wheel one
turn and then measure between the marks. This is normally call the rolling
distance.


RPM x WC
MPH = -----------
RATIO x 1056


or converted to


MPH x RATIO x 1056
RPM = ------------------
WC

By experimentation and testing it takes about 600 wt/hr of energy to move
100 lbs of weight at about 3000 rpm with a overall ratio of 1:1. As the
weight increases, the wt/hr increases as the ratio increases the wt/hr
decreases.


According to NetGain, A 9 inch motor has the best efficiency and torque at
about 3000 rpm. A 11 inch motor is best at 1800 rpm at the same torque
which is call the sweet spot of a motor.


To find out the best rpm in each gear, drive the EV in that one gear and
record rpm, mph, battery ampere, battery voltage and if you can the motor
ampere and motor voltage. Repeat this test in each gear.

There will be certain rpm that the ampere will stable or even drop.

I am now running a temporary Warp 9 while my 11 is maintenance and being
modified. My 9 has to run at a higher rpm then the 11 for the same torque
which the sweet spot is at about 3000 rpm. The motor ampere lowers about 50
amps at 3000 rpm as compare to the 11 at 1800 rpm while I am in a first gear
overall ration of 19.496:1 which is twice the ratios over the standard.

Roland






----- Original Message -----
From: "Darin at- forkenswift.com" <[email protected]>
To: <[email protected]>
Sent: Monday, October 15, 2007 8:42 AM
Subject: [EVDL] EV driver's ed: accelerating for max. range vs. best time


>
> I'm not too proud to admit I don't know what I don't know. With that in
> mind, I'd appreciate any pointers about general EV-specific driving
> techniques. Starting with the basics of acceleration, please let me know
> if
> I've got this wrong:
>
> Acceleration (for absolute max. efficiency/range):
>
> - keep battery amps as low as possible (ie. proverbial egg under the foot)
> - use all the gears (ie. 1st to 2nd to 3rd)
> - permit the motor to rev up high in each gear before upshifting (ie.
> 3000-5000 RPM)
>
> Acceleration (for quickest rate thereof):
>
> - maximize amp draw, but ensure voltage stays above 1.75v per cell
> - upshift when amps start dropping in each gear (ie. upshift *sooner* than
> in efficiency mode)
> - possibly start out in 2nd, vs. shifting 1st to 2nd?
>
> Once at speed, I assume the best choice is to go for most efficiency - ie.
> choose a gear that permits the motor to spin in the neighbourhood of
> 3000-5000 RPM.
>
> Keep in mind this is a 48vdc car (e.g. 5000 RPM is more or less
> unattainable
> except going downhill). I'm not sure if techniques differ depending on
> power availability (ie. staying in one gear in a high-powered EV with a
> free-revving motor).
>
> thanks for any feedback -
> Darin
> --
> View this message in context:
> http://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best-time-tf4627983s25542.html#a13214218
> Sent from the Electric Vehicle Discussion List mailing list archive at
> Nabble.com.
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

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Discussion Starter #2
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

On Mon, 15 Oct 2007 07:42:48 -0700 (PDT), you wrote:

>
>I'm not too proud to admit I don't know what I don't know. With that in
>mind, I'd appreciate any pointers about general EV-specific driving
>techniques. Starting with the basics of acceleration, please let me know if
>I've got this wrong:
>
I have already sent this to Darin.
I have a zip file of some paperwork that came with my Electrica.
"Economical Electric Vehicle Operations" I would be happy to send it
to anyone who needs/wants it.

R. M. Milliron

1981 Jet Electrica (Ford Escort)
http://www.austinev.org/evalbum/702

This machine had been garaged for 17 years. I have
upgraded and made it operable. Tabitha, my daughter,
named it, "Pikachu". It's yellow and black, electric
and contains Japanese parts, so I went with it.



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Discussion Starter #3
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

R. Matt Milliron wrote:
> I have a zip file of some paperwork that came with my Electrica.
> "Economical Electric Vehicle Operations" I would be happy to send it to
> anyone who needs/wants it.

Matt - as I said in my personal e-mail: thank you! There is some really
good info in those pages.

They confirmed what I suspected, but which seemed counter-intuitive after a
lifetime of driving an ICE vehicle - particularly the part about
accelerating quickly.

Where previously I would use gears 1 & 2 to try to accelerate fast, this
evening I tried 1st through 4th and I probably lopped 1/3 off my 0-30 time
because I was able to keep the amps up longer. The difference is stark - so
much so that some of the "grown up" roads around here that I previously
considered off-limits may no longer be. On a fresh charge, anyway!

To any other EV noobs reading this: I recommend you ask Matt (or myself) for
a copy of this file. Maybe it should go in the EV album library.

Darin

http://www.austinev.org/evalbum/1146
http://forkenswift.com/
--
View this message in context: http://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best-time-tf4627983s25542.html#a13223877
Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com.

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Discussion Starter #4
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

If someone sends it my way, I'll be happy to put on my server for all to
enjoy....

I doubt anyone will come after me for copyright violations.... =)

-Phil
----- Original Message -----
From: "Darin at- forkenswift.com" <[email protected]>
To: <[email protected]>
Sent: Tuesday, October 16, 2007 9:06 AM
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
time


>
>
> R. Matt Milliron wrote:
>> I have a zip file of some paperwork that came with my Electrica.
>> "Economical Electric Vehicle Operations" I would be happy to send it to
>> anyone who needs/wants it.
>
> Matt - as I said in my personal e-mail: thank you! There is some really
> good info in those pages.
>
> They confirmed what I suspected, but which seemed counter-intuitive after
> a
> lifetime of driving an ICE vehicle - particularly the part about
> accelerating quickly.
>
> Where previously I would use gears 1 & 2 to try to accelerate fast, this
> evening I tried 1st through 4th and I probably lopped 1/3 off my 0-30 time
> because I was able to keep the amps up longer. The difference is stark -
> so
> much so that some of the "grown up" roads around here that I previously
> considered off-limits may no longer be. On a fresh charge, anyway!
>
> To any other EV noobs reading this: I recommend you ask Matt (or myself)
> for
> a copy of this file. Maybe it should go in the EV album library.
>
> Darin
>
> http://www.austinev.org/evalbum/1146
> http://forkenswift.com/
> --
> View this message in context:
> http://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best-time-tf4627983s25542.html#a13223877
> Sent from the Electric Vehicle Discussion List mailing list archive at
> Nabble.com.
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
For subscription options, see
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Discussion Starter #5
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Roland Wiench wrote:
> Here is a formula that you can find what the mph is at the rpm of a motor
> at different overall ratios (transmission ratios times axle ratio) using
> different Wheel circumference (WC).

Thanks for that info & the idea. The ForkenSwift now has a "tachometer"
installed: a compact chart taped beside the speedometer showing motor RPM in
gears 1 through 3 at 5 km/h intervals.

I also like your idea of experimentally finding the most efficient motor RPM
for each gear. It's on the "to-do" list.

thanks again -
Darin
--
View this message in context: http://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best-time-tf4627983s25542.html#a13223965
Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com.

_______________________________________________
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Discussion Starter #6
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Daren,
=

Please forward the info to me at [email protected]
Beano -- 1981 Ford Escort EV =

EValbum 1010Ted Sanders

> Date: Mon, 15 Oct 2007 16:06:20 -0700> From: [email protected]> To: e=
[email protected]> Subject: Re: [EVDL] EV driver's ed: accelerating for max.=
range vs. best time> > > > R. Matt Milliron wrote:> > I have a zip file of=
some paperwork that came with my Electrica.> > "Economical Electric Vehicl=
e Operations" I would be happy to send it to> > anyone who needs/wants it.>=
> Matt - as I said in my personal e-mail: thank you! There is some really>=
good info in those pages.> > They confirmed what I suspected, but which se=
emed counter-intuitive after a> lifetime of driving an ICE vehicle - partic=
ularly the part about> accelerating quickly. > > Where previously I would u=
se gears 1 & 2 to try to accelerate fast, this> evening I tried 1st through=
4th and I probably lopped 1/3 off my 0-30 time> because I was able to keep=
the amps up longer. The difference is stark - so> much so that some of the=
"grown up" roads around here that I previously> considered off-limits may =
no longer be. On a fresh charge, anyway!> > To any other EV noobs reading t=
his: I recommend you ask Matt (or myself) for> a copy of this file. Maybe i=
t should go in the EV album library.> > Darin> > http://www.austinev.org/ev=
album/1146> http://forkenswift.com/> -- > View this message in context: htt=
p://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best=
-time-tf4627983s25542.html#a13223877> Sent from the Electric Vehicle Discus=
sion List mailing list archive at Nabble.com.> > __________________________=
_____________________> For subscription options, see> http://lists.sjsu.edu=
/mailman/listinfo/ev
_________________________________________________________________
Help yourself to FREE treats served up daily at the Messenger Caf=E9. Stop =
by today.
http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=3DTXT_TAGLM_Oc=
tWLtagline
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Discussion Starter #7
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Darin at- forkenswift.com wrote:
>
> Maybe it should go in the EV album library.
>

Whoops, I meant to say EVDL.org library. (Hmm, David?)


--
View this message in context: http://www.nabble.com/EV-driver%27s-ed%3A-accelerating-for-max.-range-vs.-best-time-tf4627983s25542.html#a13225887
Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com.

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Discussion Starter #8
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Roland Wiench wrote:
> To find out the best rpm in each gear, drive the EV in that one gear and
> record rpm, mph, battery ampere, battery voltage and if you can the motor
> ampere and motor voltage. Repeat this test in each gear.
> =

> There will be certain rpm that the ampere will stable or even drop.

This is so easy, no math or formulas needed. Simply place your shunt and ac=
curate ammeter in the controller to motor loop.

Drive vehicle, observe amp draw, speedometer, and road incline, and... befo=
re you know it, you will know right where the sweet spots are in any gear a=
nd, before you know it, it will become instinctual.

Sorta like using a vacuum gauge to determine fuel economy.

Roy

_________________________________________________________________
Climb to the top of the charts! Play Star Shuffle: the word scramble =
challenge with star power.
http://club.live.com/star_shuffle.aspx?icid=3Dstarshuffle_wlmailtextlink_oct

_______________________________________________
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Discussion Starter #9
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

No, measure current in your battery feed.
Motor current has no relation to energy consumed.
Only reason to measure motor current is when it
maxes out your controller, typically when driving
in too high gear, so you will find this easily
by checking acceleration in different gears,
for example check 0 - 10 MPH times; 10 - 20 times
20 - 30 times and so on, in different gears to get
a feel where your motor can draw optimal power
from the controller without current or voltage
limiting (or back-EMF driving the current down,
which will be real evident from the battery amps
falling off with full throttle or even the RPM
limiter engaging).

The rule of thumb is actually quite simple:
Use the highest gear that still gives you
acceptable acceleration and you will never be
lugging your motor at too high current, you
only need to either do the math on your motor
revs or rely on the rev limiter (if installed)
to stop revving the motor beyond a certain
speed, dependent on the gear. You probably best
keep a list with max speeds per gear or place
red dots on your speedometer with the gear nrs
written on them, at the speed where the motor =

redlines, for example
25 =3D red (1) dot
45 =3D red (2) dot
65 =3D red (3) dot
80 =3D red (4) dot

Cor van de Water
Systems Architect
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.com
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 542 5225 VoIP: +31 20 3987567 FWD# 25925
Fax: +1 408 731 3675 eFAX: +31-87-784-1130
Second Life: www.secondlife.com/?u=3D3b42cb3f4ae249319edb487991c30acb

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behal=
f Of Roy LeMeur
Sent: Monday, October 15, 2007 8:18 PM
To: EVDL EVDL
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best ti=
me



Roland Wiench wrote:
> To find out the best rpm in each gear, drive the EV in that one gear =

> and record rpm, mph, battery ampere, battery voltage and if you can =

> the motor ampere and motor voltage. Repeat this test in each gear.
> =

> There will be certain rpm that the ampere will stable or even drop.

This is so easy, no math or formulas needed. Simply place your shunt and ac=
curate ammeter in the controller to motor loop.

Drive vehicle, observe amp draw, speedometer, and road incline, and... befo=
re you know it, you will know right where the sweet spots are in any gear a=
nd, before you know it, it will become instinctual.

Sorta like using a vacuum gauge to determine fuel economy.

Roy

_________________________________________________________________
Climb to the top of the charts! Play Star Shuffle: the word scramble =
challenge with star power.
http://club.live.com/star_shuffle.aspx?icid=3Dstarshuffle_wlmailtextlink_oct

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
For subscription options, see
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Discussion Starter #10
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

The reason that I monitor motor ampere, is that I do not want the motor
ampere go above the continuous ampere rating that is set by the manufacture
while driving a long distance or going up a very long hill.

A Warp 9 motor has a continuous amp rating of 199 amps while my battery
ampere may be 50 amps. Thinking that I could pull 100 battery amp
continuous or more will result in a a motor ampere of 350 to 400 amps.

My GE-11 motor also has a internal fan, external blower and has a continuous
amp ratting of 175 amps. Never had a motor amp meter on this motor, and I
was pulling 180 battery amp everyday.

I wanted to order a Zilla 1k for my EV and Otmar said to install a motor amp
meter, to check out the motor ampere, to see if a Zilla 1k will do it for my
7000 lb EV. So I did, and found that while I was pulling 180 to 200 battery
amp while driving at 60 mph or more, I was pulling 600 or more motor amps.

This cause one of the large motor bars in the field connections to melted.
So this is why I watch the motor ampere, more than the battery ampere. I
use a large 3 inch motor amp meter that is next to the speedometer which is
as important as the tachometer.

Roland








----- Original Message -----
From: "Cor van de Water" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Monday, October 15, 2007 10:54 PM
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
time


No, measure current in your battery feed.
Motor current has no relation to energy consumed.
Only reason to measure motor current is when it
maxes out your controller, typically when driving
in too high gear, so you will find this easily
by checking acceleration in different gears,
for example check 0 - 10 MPH times; 10 - 20 times
20 - 30 times and so on, in different gears to get
a feel where your motor can draw optimal power
from the controller without current or voltage
limiting (or back-EMF driving the current down,
which will be real evident from the battery amps
falling off with full throttle or even the RPM
limiter engaging).

The rule of thumb is actually quite simple:
Use the highest gear that still gives you
acceptable acceleration and you will never be
lugging your motor at too high current, you
only need to either do the math on your motor
revs or rely on the rev limiter (if installed)
to stop revving the motor beyond a certain
speed, dependent on the gear. You probably best
keep a list with max speeds per gear or place
red dots on your speedometer with the gear nrs
written on them, at the speed where the motor
redlines, for example
25 = red (1) dot
45 = red (2) dot
65 = red (3) dot
80 = red (4) dot

Cor van de Water
Systems Architect
Proxim Wireless Corporation http://www.proxim.com
Email: [email protected] Private: http://www.cvandewater.com
Skype: cor_van_de_water IM: [email protected]
Tel: +1 408 542 5225 VoIP: +31 20 3987567 FWD# 25925
Fax: +1 408 731 3675 eFAX: +31-87-784-1130
Second Life: www.secondlife.com/?u=3b42cb3f4ae249319edb487991c30acb

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf
Of Roy LeMeur
Sent: Monday, October 15, 2007 8:18 PM
To: EVDL EVDL
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
time



Roland Wiench wrote:
> To find out the best rpm in each gear, drive the EV in that one gear
> and record rpm, mph, battery ampere, battery voltage and if you can
> the motor ampere and motor voltage. Repeat this test in each gear.
>
> There will be certain rpm that the ampere will stable or even drop.

This is so easy, no math or formulas needed. Simply place your shunt and
accurate ammeter in the controller to motor loop.

Drive vehicle, observe amp draw, speedometer, and road incline, and...
before you know it, you will know right where the sweet spots are in any
gear and, before you know it, it will become instinctual.

Sorta like using a vacuum gauge to determine fuel economy.

Roy

_________________________________________________________________
Climb to the top of the charts! Play Star Shuffle: the word scramble
challenge with star power.
http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_oct

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 

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70 Posts
Discussion Starter #12
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Matt,
I would be interested in any information on the electrica. I have
purchased a 1981 jet electrica 007 and have no information at all on it.
Would you email me a copy. If anyone else can help out I would appreciate
it too.

Thanks,
Clif

----- Original Message -----
From: "R. Matt Milliron" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Monday, October 15, 2007 2:01 PM
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
time


> On Mon, 15 Oct 2007 07:42:48 -0700 (PDT), you wrote:
>
>>
>>I'm not too proud to admit I don't know what I don't know. With that in
>>mind, I'd appreciate any pointers about general EV-specific driving
>>techniques. Starting with the basics of acceleration, please let me know
>>if
>>I've got this wrong:
>>
> I have already sent this to Darin.
> I have a zip file of some paperwork that came with my Electrica.
> "Economical Electric Vehicle Operations" I would be happy to send it
> to anyone who needs/wants it.
>
> R. M. Milliron
>
> 1981 Jet Electrica (Ford Escort)
> http://www.austinev.org/evalbum/702
>
> This machine had been garaged for 17 years. I have
> upgraded and made it operable. Tabitha, my daughter,
> named it, "Pikachu". It's yellow and black, electric
> and contains Japanese parts, so I went with it.
>
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 

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Discussion Starter #13
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

I put the Jet Industries excerpt online for all to read:
http://ingineerix.com/ev-econ/

Thanks Matt!

-Phil
----- Original Message -----
From: "Clif Martin" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Wednesday, October 17, 2007 9:19 AM
Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
time


> Matt,
> I would be interested in any information on the electrica. I have
> purchased a 1981 jet electrica 007 and have no information at all on it.
> Would you email me a copy. If anyone else can help out I would appreciate
> it too.
>
> Thanks,
> Clif
>
> ----- Original Message -----
> From: "R. Matt Milliron" <[email protected]>
> To: "Electric Vehicle Discussion List" <[email protected]>
> Sent: Monday, October 15, 2007 2:01 PM
> Subject: Re: [EVDL] EV driver's ed: accelerating for max. range vs. best
> time
>
>
>> On Mon, 15 Oct 2007 07:42:48 -0700 (PDT), you wrote:
>>
>>>
>>>I'm not too proud to admit I don't know what I don't know. With that in
>>>mind, I'd appreciate any pointers about general EV-specific driving
>>>techniques. Starting with the basics of acceleration, please let me know
>>>if
>>>I've got this wrong:
>>>
>> I have already sent this to Darin.
>> I have a zip file of some paperwork that came with my Electrica.
>> "Economical Electric Vehicle Operations" I would be happy to send it
>> to anyone who needs/wants it.
>>
>> R. M. Milliron
>>
>> 1981 Jet Electrica (Ford Escort)
>> http://www.austinev.org/evalbum/702
>>
>> This machine had been garaged for 17 years. I have
>> upgraded and made it operable. Tabitha, my daughter,
>> named it, "Pikachu". It's yellow and black, electric
>> and contains Japanese parts, so I went with it.
>>
>>
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>

_______________________________________________
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Discussion Starter #14
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

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Discussion Starter #15
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

you wrote:

>I have some questions about the advice given in this document.

This paper was written for a 1981 Jet Electrica, with 96 volts of
flooded lead acid batteries. The controller was a primitive SCR that
probably drew no more than 300 amps feeding a series wound Prestolite
MTC-4001 motor with 4.5 degrees of advance. I find that it still
seems to work with a Zilla and 120 volts of flooded's.

>First of all, running the motor at slower speed does cause it to draw
>more amps. But cruising at the same speed or in any other comparison
>where the horsepower output is the same, there really shouldn't be that
>much difference in battery amps, since the lower voltage across the
>motor compensates to some degree for the higher motor amps. There will
>be increased heating losses in the motor and in the wiring from the
>controller to the motor if producing the same HP at lower RPMs, but
>these shouldn't account for as much as they seem to be claiming. In
>fact, at very high RPM, your windage losses from the motor's fan may be
>so great that you'd be more efficient at a somewhat lower RPM. Do I
>understand this correctly?

That fan ain't that big. BUT, check with John Husted. The car came
with a high volume squirrel cage blower for motor cooling.

>Also, they recommend having the pedal floored in a low gear. They seem
>to be assuming that the motor has a speed sensor and that the controller
>won't power the motor beyond a given RPM. How many controllers offer
>this feature?

ZILLA DO! I have my Zilla set to draw no more than 200 amps from my
pack. In third gear with the peddle to the floor, Pikachu cruises at
55 miles per hour. Maybe 2500 rpm. With a power limited controller
the motor won't go any faster than the amps put to it.


R. M. Milliron

1981 Jet Electrica (Ford Escort)
http://www.austinev.org/evalbum/702

This machine had been garaged for 17 years. I have
upgraded and made it operable. Tabitha, my daughter,
named it, "Pikachu". It's yellow and black, electric
and contains Japanese parts, so I went with it.



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Discussion Starter #16
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

On 17 Oct 2007 at 16:59, Christopher Robison wrote:

> they recommend having the pedal floored in a low gear. They seem
> to be assuming that the motor has a speed sensor and that the controller
> won't power the motor beyond a given RPM. How many controllers offer
> this feature?

Unless I'm mistaken, all or most of the Jet conversions ran their motors at
rated voltage. In my experience, a series motor operated at rated voltage
in an EV isn't too likely to overspeed when driven on the flat, under a
reasonable load. Back EMF alone will limit your speed.

It may still overspeed when you're going downhill, though.

David Roden - Akron, Ohio, USA
EVDL Administrator

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVDL Information: http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
Note: mail sent to "evpost" or "etpost" addresses will not
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email address from the webpage http://www.evdl.org/help/ .
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Discussion Starter #17
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

On 18 Oct 2007 at 7:13, (=A4Phil=A4) wrote:

> I put the Jet Industries excerpt online for all to read:

Thanks!

This excerpt from the old Jet Industries manual is also posted in the EVDL =

library. Thanks to R M Milliron and Darin Cosgrove for forwarding the =

materials to me.

http://www.evdl.org/lib/

I formatted it as a PDF file and corrected a few typographical and =

structural errors, so it will be easy to download and print a copy for late=
r =

reference.

http://evdl.org/docs/jet_driving_tips.pdf

Not to suggest anything, but EV-related materials on the web come and go. =

Sometimes the people who post the material lose interest and/or later need =

the server space for other material. That's the reason I started the EVDL =

library. I expect to maintain it as a resource for EVDL members and EV =

hobbyists as long as I live. =


And I expect I have quite a few years yet to go, as long as I'm careful =

around batteries - see http://evdl.org/pages/plasmaboy.html ;-).

David Roden - Akron, Ohio, USA
EVDL Administrator

=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D=
=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D
EVDL Information: http://www.evdl.org/help/
=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D=
=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =

Note: mail sent to "evpost" or "etpost" addresses will not =

reach me. To send a private message, please obtain my =

email address from the webpage http://www.evdl.org/help/ .
=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D =3D=
=3D =3D =3D =3D =3D =3D =3D =3D =3D =3D



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Discussion Starter #18
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

David Roden wrote:
> On 17 Oct 2007 at 16:59, Christopher Robison wrote:
>
>
> Unless I'm mistaken, all or most of the Jet conversions ran their motors at
> rated voltage. In my experience, a series motor operated at rated voltage
> in an EV isn't too likely to overspeed when driven on the flat, under a
> reasonable load. Back EMF alone will limit your speed.
>
Well, yesterday I got on the freeway, accelerated (slowly),
and put my 1981 Jet Electrica into 3rd gear. I then put the pedal
to the floor and watched the speed climb. The sun visor lists
the maximum 3rd gear speed as 55. So at 63 mph I chickened out
and shifted to 4th. I do not know how much faster Buzz would
have gone.

Current fell below 200 Amps and was still falling.
16 T105's, freshly charged. 4 or 5 miles before the test.
Curtis 1631C.

Speedometer calibration to follow!

John in Sylmar, CA
'Please don't crush my EV'

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Discussion Starter #19
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

David Roden wrote:

> I formatted it as a PDF file and corrected a few typographical and
> structural errors, so it will be easy to download and print a copy for later
> reference.
>
> http://evdl.org/docs/jet_driving_tips.pdf

David, thanks for putting that in the library - and cleaning it up too.

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Discussion Starter #20
Re: [EVDL] EV driver's ed: accelerating for max. range vs. best time

Ahhh perfect exactly what info i was looking for . now i see why to allways
check archives ..
Thanks!

This excerpt from the old Jet Industries manual is also posted in the EVDL
library. Thanks to R M Milliron and Darin Cosgrove for forwarding the
materials to me.

http://www.evdl.org/lib/

I formatted it as a PDF file and corrected a few typographical and
structural errors, so it will be easy to download and print a copy for later
reference.

http://evdl.org/docs/jet_driving_tips.pdf

Not to suggest anything, but EV-related materials on the web come and go.
Sometimes the people who post the material lose interest and/or later need
the server space for other material. That's the reason I started the EVDL
library. I expect to maintain it as a resource for EVDL members and EV
hobbyists as long as I live.

And I expect I have quite a few years yet to go, as long as I'm careful
around batteries - see http://evdl.org/pages/plasmaboy.html ;-).

David Roden - Akron, Ohio, USA
EVDL Administrator

= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
EVDL Information: http://www.evdl.org/help/
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =
Note: mail sent to "evpost" or "etpost" addresses will not
reach me. To send a private message, please obtain my
email address from the webpage http://www.evdl.org/help/ .
= = = = = = = = = = = = = = = = = = = = = = = = = = = = =



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