Send EV mailing list submissions to
ev@lists.sjsu.edu
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.sjsu.edu/mailman/listinfo/ev
or, via email, send a message with subject or body 'help' to
[EMAIL PROTECTED]
You can reach the person managing the list at
[EMAIL PROTECTED]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of EV digest..."
Today's Topics:
1. Re: Crazyhorse Pinto Motors are in :-) (Pestka, Dennis J)
2. Re: Todd PC 20 Question DC - DC (Paul)
3. Re: Crazyhorse Pinto Motors are in :-) (MIKE WILLMON)
4. Re: Crazyhorse Pinto Motors are in :-) (MIKE WILLMON)
5. Re: Crazyhorse Pinto Motors are in :-) (MIKE WILLMON)
6. Re: Crazyhorse Pinto Motors are in :-) (MIKE WILLMON)
7. Sevcon controller info request ([EMAIL PROTECTED])
8. Re: EVision Heaven ([EMAIL PROTECTED])
9. Re: Crazyhorse Pinto Motors are in :-) (Rod Hower)
10. PM Magnets & Trends (Sam Maynard)
11. Re: Todd PC 20 Question DC - DC (Adrian DeLeon)
12. I got a shiny green box today (Paul)
13. Re: PM Magnets & Trends (Rod Hower)
14. Re: DC/DC with flexible pack voltage? (Adrian DeLeon)
15. Re: PM Magnets & Trends ([EMAIL PROTECTED])
16. Re: Todd PC 20 Question DC - DC (shred)
17. Re: EV Digest, Vol 6, Issue 28 (Lee Hart)
18. Re: Crazyhorse Pinto Motors are in :-) (Ian Hooper)
19. Re: Crazyhorse Pinto Motors are in :-) ([EMAIL PROTECTED])
20. Re: Crazyhorse Pinto Motors are in :-) ([EMAIL PROTECTED])
21. Current Eliminator on VOX ([EMAIL PROTECTED])
22. Re: Todd PC 20 Question DC - DC (Zeke Yewdall)
23. Batery Balancer on UTube (Arak Leatham)
24. Re: E-meter questions (Jeff Shanab)
25. Re: DC/DC with flexible pack voltage? (John Mogelnicki)
26. Re: DC/DC with flexible pack voltage? (Josh Creel)
27. Re: PM Magnets & Trends (Sam Maynard)
28. Re: Crazyhorse Pinto Motors are in :-) (Mike Willmon)
29. Re: Crazyhorse Pinto Motors are in :-) (Mike Willmon)
30. Re: EV Digest, Vol 6, Issue 28 (Bob Rice)
31. Re: EVision Heaven (Metric Mind)
32. Re: battery box doesn't fit (Bill Dennis)
33. Re: E-meter questions (Lee Hart)
34. Re: EVision Heaven (Metric Mind)
35. 50 mile commute EV in GB ((-Phil-))
36. Re: Charger (m gol)
----------------------------------------------------------------------
Message: 1
Date: Wed, 9 Jan 2008 14:10:31 -0600
From: "Pestka, Dennis J" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Mike;
Looking Good !
When is the estimated date that we see the first 1/4 mile time?
Dennis
-----Original Message-----
From: Mike Willmon [mailto:[EMAIL PROTECTED]
Sent: Wednesday, January 09, 2008 3:35 AM
To: 'Electric Vehicle Discussion List'
Subject: [EVDL] Crazyhorse Pinto Motors are in :-)
------------------------------
Message: 2
Date: Wed, 9 Jan 2008 12:55:52 -0800
From: Paul <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Todd PC 20 Question DC - DC
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=WINDOWS-1252; delsp=yes;
format=flowed
On Jan 9, 2008, at 7:34 AM, shred wrote:
> I was told this unit will work with an input voltage of between 70
> ? 150
> volts AC or DC.
> My car has a 120v pack & voltage fluctuates between 110 ? 150 vdc.
> The Todd
> converter has always had a study output of 13.87 volts in the past.
> So I
> think there is a problem with the unit.
Are you talking about the Todd PC20-LV? The regular Todd certainly
won't work right with 70 volts DC input and where rarely used in 120
volt EVs. The -LV (low voltage) might work (for a while) at 70 volts
DC input but I strongly recommend you don't go below 90 volts DC
input (they tend to burn out with a lower input voltage.)
I have a Todd PC20-LV in my 120 volt EV beach buggy.
> As a note I just ordered an IOTA 55A 108VDC - 170VDC DC/DC Converter.
> Has anyone had any good or bad experience with one of these models?
A what? What I have read from Iota indicates the regular DLS-55 runs
full output power down to 130 volts DC, then the output amps start
falling, reaching none at around 96 volts DC. Below 96 volts DC it
cannot even maintain the 13.6 output voltage with no load. They do
have low input voltage protection so they shouldn't fail due to low
input voltage.
I have an Iota DLS-55 and plan to install it in my 156 volt Datsun EV
project.
Paul Gooch
------------------------------
Message: 3
Date: Wed, 09 Jan 2008 10:54:00 -0900
From: MIKE WILLMON <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
The Enersys Genesis pure lead series 16XE.
60 of them
two strings of 30
----- Original Message -----
From: Dan Frederiksen <[EMAIL PROTECTED]>
Date: Wednesday, January 9, 2008 9:45 am
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
> looks nice. what batteries are you using?
>
> Mike Willmon wrote:
> > After a couple weeks, measuring, cutting, looking at, measuring
> again,> welding, measuring, looking at, measuring again, welding
> some more and
> > finally painting....we got the motor mounts finished and tonight
> the motors
> > went "into the Pinto".
> >
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 4
Date: Wed, 09 Jan 2008 11:21:03 -0900
From: MIKE WILLMON <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
We're shooting for the May 21st first Test & Tune of the season at the track.
http://www.akracewaypark.com/2008schedule.html
The season opener and first points race starts May 11th and 18th, but probably
better to get the kinks worked out on a slow Test & Tune date.
The track owner called me the other day and said he'd sure reserve us parking
on the paved portion of the pits. It sounds like all involved in the track are
eager to see the car run.
:-)
----- Original Message -----
From: "Pestka, Dennis J" <[EMAIL PROTECTED]>
Date: Wednesday, January 9, 2008 11:11 am
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
> Mike;
>
> Looking Good !
>
> When is the estimated date that we see the first 1/4 mile time?
>
>
> Dennis
>
> -----Original Message-----
> From: Mike Willmon [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, January 09, 2008 3:35 AM
> To: 'Electric Vehicle Discussion List'
> Subject: [EVDL] Crazyhorse Pinto Motors are in :-)
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 5
Date: Wed, 09 Jan 2008 12:40:07 -0900
From: MIKE WILLMON <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
The Enersys Genesis pure lead series 16XE.
60 of them
two strings of 30
----- Original Message -----
From: Dan Frederiksen <[EMAIL PROTECTED]>
Date: Wednesday, January 9, 2008 9:45 am
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
> looks nice. what batteries are you using?
>
> Mike Willmon wrote:
> > After a couple weeks, measuring, cutting, looking at, measuring
> again,> welding, measuring, looking at, measuring again, welding
> some more and
> > finally painting....we got the motor mounts finished and tonight
> the motors
> > went "into the Pinto".
> >
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 6
Date: Wed, 09 Jan 2008 12:40:33 -0900
From: MIKE WILLMON <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
We're shooting for the May 21st first Test & Tune of the season at the track.
http://www.akracewaypark.com/2008schedule.html
The season opener and first points race starts May 11th and 18th, but probably
better to get the kinks worked out on a slow Test & Tune date.
The track owner called me the other day and said he'd sure reserve us parking
on the paved portion of the pits. It sounds like all involved in the track are
eager to see the car run.
:-)
----- Original Message -----
From: "Pestka, Dennis J" <[EMAIL PROTECTED]>
Date: Wednesday, January 9, 2008 11:11 am
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
> Mike;
>
> Looking Good !
>
> When is the estimated date that we see the first 1/4 mile time?
>
>
> Dennis
>
> -----Original Message-----
> From: Mike Willmon [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, January 09, 2008 3:35 AM
> To: 'Electric Vehicle Discussion List'
> Subject: [EVDL] Crazyhorse Pinto Motors are in :-)
>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 7
Date: Wed, 9 Jan 2008 18:09:12 EST
From: [EMAIL PROTECTED]
Subject: [EVDL] Sevcon controller info request
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
Just a quick request, does anyone have any information on the model
specifications for Sevcon controllers, model MOS90 -631/xxxxxx . I would
like to
know what the various model specs are for the different device subcategories
in 'xxxxx', such as 41020, 41030, 40034, etc...
Less important but also of interest, would be any information on the
Sevcontrol Exchange controller, such as 662/40034.
Thanks in advance,
Chris
------------------------------
Message: 8
Date: Wed, 9 Jan 2008 16:17:21 -0500
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EVision Heaven
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Victor,
I have an EVision question, and I thought I'd ask it here on the EVDL so
others could benefit from your answer. My traction pack has an odd number
of batteries, so I can't do an exact center tap for the EVision. Will the
EVision work without the center tap?
Thanks.
Bill Dennis
--------------------------------------------------------------------
mail2web.com ? What can On Demand Business Solutions do for you?
http://link.mail2web.com/Business/SharePoint
------------------------------
Message: 9
Date: Wed, 9 Jan 2008 16:01:10 -0800 (PST)
From: Rod Hower <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Hey Mike,
I hope the first 1/4 mile run of the event is a snow
plow :-)
Rod
P.S. Nice installation, looking really good. Hope you
keep up the excellent documentation of the project!
I guess I have a soft spot in my heart for Pinto's, I
had a station wagon for awhile in high school, nice
car for dates (because of the good mileage of course!)
--- MIKE WILLMON <[EMAIL PROTECTED]> wrote:
> We're shooting for the May 21st first Test & Tune of
> the season at the track.
> http://www.akracewaypark.com/2008schedule.html
>
> The season opener and first points race starts May
> 11th and 18th, but probably better to get the kinks
> worked out on a slow Test & Tune date.
>
> The track owner called me the other day and said
> he'd sure reserve us parking on the paved portion of
> the pits. It sounds like all involved in the track
> are eager to see the car run.
>
> :-)
>
> ----- Original Message -----
> From: "Pestka, Dennis J"
> <[EMAIL PROTECTED]>
> Date: Wednesday, January 9, 2008 11:11 am
> Subject: Re: [EVDL] Crazyhorse Pinto Motors are in
> :-)
> To: Electric Vehicle Discussion List
> <ev@lists.sjsu.edu>
>
> > Mike;
> >
> > Looking Good !
> >
> > When is the estimated date that we see the first
> 1/4 mile time?
> >
> >
> > Dennis
> >
> > -----Original Message-----
> > From: Mike Willmon [mailto:[EMAIL PROTECTED]
> > Sent: Wednesday, January 09, 2008 3:35 AM
> > To: 'Electric Vehicle Discussion List'
> > Subject: [EVDL] Crazyhorse Pinto Motors are in :-)
> >
> >
> > _______________________________________________
> > For subscription options, see
> > http://lists.sjsu.edu/mailman/listinfo/ev
> >
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 10
Date: Wed, 9 Jan 2008 16:33:38 -0800
From: "Sam Maynard" <[EMAIL PROTECTED]>
Subject: [EVDL] PM Magnets & Trends
To: <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Describing the near future demand for EV's as "unstoppable":
http://www.physorg.com/news119117780.html
Coming up next: Advances in troll repellent! :^o
------------------------------
Message: 11
Date: Wed, 09 Jan 2008 17:10:51 -0800
From: "Adrian DeLeon" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Todd PC 20 Question DC - DC
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; delsp=yes;
charset=iso-8859-15
> As a note I just ordered an IOTA 55A 108VDC - 170VDC DC/DC Converter.
> Has anyone had any good or bad experience with one of these models?
I tried both the IOTA and the Zivan NG1-DCDC in my 114V car. Both had
problems keeping their output voltage up when the input voltage dropped
below 110V. I could watch my 12V gauge drop steadily with %SOC. The Zivan
held up better than the IOTA - and I never used the IOTA boost plug.
Neither had issues "cutting out" with inputs as low as 90V. They just
reduced their output voltage until the SLI battery took over. Got a few
Zilla low input warnings coming home at night with the lights & heater on.
I now have a custom BAP319 DC/DC from Absopulse. They're designed for
railway use, with a spectacular MTBF. No more dimming lights on
acceleration...
------------------------------
Message: 12
Date: Wed, 9 Jan 2008 17:16:50 -0800
From: Paul <[EMAIL PROTECTED]>
Subject: [EVDL] I got a shiny green box today
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Tearing open a box from Cafe Electric is like being a kid in a candy
store!
Its a shiny new Z1k-LV controller and assorted other goodies for my
'66 Datsun (though I have to really wonder what the 1400 lb EV Buggy
would behave like with 1000 amps :-)
Paul Gooch
------------------------------
Message: 13
Date: Wed, 9 Jan 2008 17:20:46 -0800 (PST)
From: Rod Hower <[EMAIL PROTECTED]>
Subject: Re: [EVDL] PM Magnets & Trends
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Sam,
Thanks for the post.
I'm a little confused though.
I use neodymium-iron-boron magnets in my BLDC motors
that are used in the transportation industry (If you
ride a new Greyhound bus, it has my motors operating
the evaporator and condenser blower/fans for
heating/cooling). The rotors (which have many high
energy magnets) are magnetized after assembling the
rotor (all glue etc is already dried and even if it
was injection molded you wouldn't magnetize the
assembly until it's cool).
Since the BLDC motor is pretty efficient and designed
properly for the loads it's about to see, why would
the magnets ever see anything close to 200C? My
motors usually run at only 30 to 40C above ambient max
seen at the rotor magnets, so it's kind of puzzling.
Not trying to be critical about the post, this is just
a general question posted for anybody on the list for
more information. Just trying to learn new tricks of
the trade for my day job.
Thanks,
Rod
--- Sam Maynard <[EMAIL PROTECTED]> wrote:
> Describing the near future demand for EV's as
> "unstoppable":
>
> http://www.physorg.com/news119117780.html
>
> Coming up next: Advances in troll repellent! :^o
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 14
Date: Wed, 09 Jan 2008 17:37:02 -0800
From: "Adrian DeLeon" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] DC/DC with flexible pack voltage?
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; delsp=yes;
charset=iso-8859-15
> I can't find a DC/DC converter that's equally flexible.
IOTA units (power supply) don't work very well below 110VDC input. When
loaded, their output voltage drops with decreasing input voltage, but they
handle the "brownout" very well. Roland uses them in series/parallel in
his El Camino.
Ditto for the Zivan NG1-DCDC. It holds up better at low input voltage, but
output voltage still sags.
The Belktronix DC/DC works from 84V to 200V. It will do 250V if you keep a
1A or higher load on it. The manual requires precharging BOTH the input
and output before connecting them, so you may need to use a precharge
circuit if you regularly disconnect the input OR the output. I think a few
listers are using them.
If you have an even number of batteries you could connect a DC/DC to each
half of the pack. A 192V pack would feed two 96V DC/DC units. If their
output voltage drops slightly with load (most do), they should draw
similar amounts of current from each pack half.
You could also use the 10-14V input, 14V output converter with a modified
version of Lee's battery balancer. Divide the traction pack up into 10-14V
groups and take turns feeding the DC/DC with each group to avoid
unbalancing the pack.
As a last resort, use another PFC-20/30/50 to keep your 12V battery
charged. They run 60-250VAC, and SHOULD work with 84-336VDC (check w/
Manzanita to be sure). Not cheap, but rock solid (if a bit noisy with the
dual fans).
-Adrian
------------------------------
Message: 15
Date: Thu, 10 Jan 2008 01:52:22 GMT
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] PM Magnets & Trends
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
I'm not sure about your bldc motor, I have read that it is a concern with wheel
motors which typically operate at lower speeds (no gear reduction), and use
very high gauss (high strength) Neo magnets....
Heat is one potential cause of performance loss in magnets, and the other
potential problem is vibration.
That aside, encapsulating the magnet material into an injection moldable
polymer is a huge step forward. It will facilitate large benefits of
scale....increasing production ten fold would lower costs allot!
_____________________________________________________________
Explore paradise with a great Hawaiian cruise. Click here for package deals!
http://thirdpartyoffers.netzero.net/TGL2221/fc/Ioyw6i4ve20ih44uhH3n2B8WIwcU5cAcYGw4O3zNU6OirytFnJNU6r/
------------------------------
Message: 16
Date: Wed, 9 Jan 2008 18:09:47 -0800 (PST)
From: shred <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Todd PC 20 Question DC - DC
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
I am using a 33ah AGM battery charging off of the Todd 20ah DC/DC converter.
I was thinking I could loose the battery with the IOTA 55A but my pack
voltage can drop below 90 under cold weather, low SOC & hard acceleration
which could be a problem driving at night. I think my vacuum pump draws a
bit too. So I guess with my pack voltage of only 120 I should have a aux
battery in the system too?
My curtis hasn't cut out even at 45 volts.
What is the IOTA boost plug?
Neal
Adrian DeLeon wrote:
>
>> As a note I just ordered an IOTA 55A 108VDC - 170VDC DC/DC Converter.
>> Has anyone had any good or bad experience with one of these models?
>
> I tried both the IOTA and the Zivan NG1-DCDC in my 114V car. Both had
> problems keeping their output voltage up when the input voltage dropped
> below 110V. I could watch my 12V gauge drop steadily with %SOC. The Zivan
> held up better than the IOTA - and I never used the IOTA boost plug.
>
> Neither had issues "cutting out" with inputs as low as 90V. They just
> reduced their output voltage until the SLI battery took over. Got a few
> Zilla low input warnings coming home at night with the lights & heater on.
>
> I now have a custom BAP319 DC/DC from Absopulse. They're designed for
> railway use, with a spectacular MTBF. No more dimming lights on
> acceleration...
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
--
View this message in context:
http://www.nabble.com/Todd-PC-20-Question-DC---DC-tp14703661s25542p14726294.html
Sent from the Electric Vehicle Discussion List mailing list archive at
Nabble.com.
------------------------------
Message: 17
Date: Wed, 09 Jan 2008 21:11:12 -0600
From: Lee Hart <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EV Digest, Vol 6, Issue 28
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Chip Gribben wrote:
> When I was living in a townhouse development several jokesters would
> reach into my EV and turn the lights on while it was parked or
> charging, during the daytime! I'm betting these fools were thinking
> if they turn my lights on it would drive down the propulsion batteries.
> It took a few times of this before I took the time to close the
> windows and lock the doors. But then people would unplug the car.
I got my ComutaVan with only an ignition key (no door keys), so I
couldn't lock it. I went to an electrical supply house and got a big
standard "Danger -- High Voltage" sign and put that in the window.
Amazingly, it worked! People would steer a wide berth around it. They
wouldn't even step in a puddle that happened to extend under the car.
I once saw a woman and child approaching the car in a mall parking lot.
The child was fascinated and headed for the ComutaVan like a magnet. But
his mother saw the sign, and frantically pulled him away! :-)
--
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
------------------------------
Message: 18
Date: Thu, 10 Jan 2008 12:08:42 +0900
From: Ian Hooper <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Man I can't wait to hear how this thing runs, I love the idea of a
ridiculously quick electric Pinto.. Imagine the fun you could have
next to a Ferrari at the lights ;)
What controller will you be running, one Z2K?
On 10/01/2008, at 5:21 AM, MIKE WILLMON wrote:
> We're shooting for the May 21st first Test & Tune of the season at
> the track.
> http://www.akracewaypark.com/2008schedule.html
>
> The season opener and first points race starts May 11th and 18th,
> but probably better to get the kinks worked out on a slow Test &
> Tune date.
>
> The track owner called me the other day and said he'd sure reserve
> us parking on the paved portion of the pits. It sounds like all
> involved in the track are eager to see the car run.
>
> :-)
>
> ----- Original Message -----
> From: "Pestka, Dennis J" <[EMAIL PROTECTED]>
> Date: Wednesday, January 9, 2008 11:11 am
> Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
> To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
>
>> Mike;
>>
>> Looking Good !
>>
>> When is the estimated date that we see the first 1/4 mile time?
>>
>>
>> Dennis
>>
>> -----Original Message-----
>> From: Mike Willmon [mailto:[EMAIL PROTECTED]
>> Sent: Wednesday, January 09, 2008 3:35 AM
>> To: 'Electric Vehicle Discussion List'
>> Subject: [EVDL] Crazyhorse Pinto Motors are in :-)
>>
>>
>> _______________________________________________
>> For subscription options, see
>> http://lists.sjsu.edu/mailman/listinfo/ev
>>
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 19
Date: Wed, 9 Jan 2008 20:53:06 EST
From: [EMAIL PROTECTED]
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 1/9/2008 9:24:57 AM US Mountain Standard Time,
[EMAIL PROTECTED] writes:
> Subj: [EVDL] Crazyhorse Pinto Motors are in :-)
> Date:1/9/2008 9:24:57 AM US Mountain Standard Time
> From:[EMAIL PROTECTED]
> Reply-to:ev@lists.sjsu.edu
> To:ev@lists.sjsu.edu
> Received from Internet:
>
>
>
> After a couple weeks, measuring, cutting, looking at, measuring again,
> welding, measuring, looking at, measuring again, welding some more and
> finally painting....we got the motor mounts finished and tonight the motors
> went "into the Pinto".
>
> Jim, we didn't Even touch them, so how's that ;-P And the batteries are
> here now so there is nothing holding us up now....well...almost nothing ;-)
>
> After much concern and re-measuring and several attempts at the drawing
> board we finally mocked the motors up with wood. And just measured and cut
> everything to fit. There seems to be huge tracts of real estate inside the
> Pinto, at least compared to what I've seen and heard about a certain white
> Datsun 1200. 5/8" terminal clearance on one of the back motor studs and
> 1/2" on the other. 1/2" under the back motor to the front end cross member.
> 1/2" each side of the rear motor inside the tunnel. Front CE shaft does not
> encroach past where the radiator would normally mount. The angle is just
> right for matching to a rear end (which is next to go in by the way). The
> gear coupler has over 1/2" clearance over the steering rack (because the
> space between the motors straddles the steering unit. These things would
> have a huge downward angle (~11 degrees) if they were Siamese just to clear
> the top of the tunnel and the top of the steering gear. Having the motors
> split allows them to set down a couple inches creating the perfect motor
> angle for the driveline.
>
> Enjoy some pics.
>
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6198.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6209.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6212.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6213.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6214.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6218.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6220.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6223.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6224.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6225.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6226.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6227.JPG
>
>
> Mike Willmon
>
Looking good Mike,I think you will be another 1/4 mile heavy hitter!! I have
always liked the (Crazy Horse name) Dennis Berube
------------------------------
Message: 20
Date: Wed, 9 Jan 2008 20:53:06 EST
From: [EMAIL PROTECTED]
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 1/9/2008 9:24:57 AM US Mountain Standard Time,
[EMAIL PROTECTED] writes:
> Subj: [EVDL] Crazyhorse Pinto Motors are in :-)
> Date:1/9/2008 9:24:57 AM US Mountain Standard Time
> From:[EMAIL PROTECTED]
> Reply-to:ev@lists.sjsu.edu
> To:ev@lists.sjsu.edu
> Received from Internet:
>
>
>
> After a couple weeks, measuring, cutting, looking at, measuring again,
> welding, measuring, looking at, measuring again, welding some more and
> finally painting....we got the motor mounts finished and tonight the motors
> went "into the Pinto".
>
> Jim, we didn't Even touch them, so how's that ;-P And the batteries are
> here now so there is nothing holding us up now....well...almost nothing ;-)
>
> After much concern and re-measuring and several attempts at the drawing
> board we finally mocked the motors up with wood. And just measured and cut
> everything to fit. There seems to be huge tracts of real estate inside the
> Pinto, at least compared to what I've seen and heard about a certain white
> Datsun 1200. 5/8" terminal clearance on one of the back motor studs and
> 1/2" on the other. 1/2" under the back motor to the front end cross member.
> 1/2" each side of the rear motor inside the tunnel. Front CE shaft does not
> encroach past where the radiator would normally mount. The angle is just
> right for matching to a rear end (which is next to go in by the way). The
> gear coupler has over 1/2" clearance over the steering rack (because the
> space between the motors straddles the steering unit. These things would
> have a huge downward angle (~11 degrees) if they were Siamese just to clear
> the top of the tunnel and the top of the steering gear. Having the motors
> split allows them to set down a couple inches creating the perfect motor
> angle for the driveline.
>
> Enjoy some pics.
>
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6198.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6209.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6212.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6213.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6214.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6218.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6220.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6223.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6224.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6225.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6226.JPG
> http://home.gci.net/~saintbernard/Motor_Install_8Jan08/DSCF6227.JPG
>
>
> Mike Willmon
>
Looking good Mike,I think you will be another 1/4 mile heavy hitter!! I have
always liked the (Crazy Horse name) Dennis Berube
------------------------------
Message: 21
Date: Wed, 9 Jan 2008 21:01:58 EST
From: [EMAIL PROTECTED]
Subject: [EVDL] Current Eliminator on VOX
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="US-ASCII"
Sunday Jan. 20 the Current Eliminator Dragster and its team will be on TV in
Germany, Switzerland and Austria on VOX in the Auto Mobil show. It will have a
45 minute air time. They will show everything that happened in Tucson on
Dec.30,07After that it will be released to us in a semi English version.
Dennis and the CE TEAM
------------------------------
Message: 22
Date: Wed, 9 Jan 2008 20:30:31 -0700
From: "Zeke Yewdall" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Todd PC 20 Question DC - DC
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
On Jan 9, 2008 7:09 PM, shred <[EMAIL PROTECTED]> wrote:
> What is the IOTA boost plug?
>
It sets the output voltage of the IOTA a volt or two higher (can't
remember the details) if you plug it in (basically, it connects two
signal terminals together)
Z
------------------------------
Message: 23
Date: Wed, 9 Jan 2008 20:49:15 -0700
From: Arak Leatham <[EMAIL PROTECTED]>
Subject: [EVDL] Batery Balancer on UTube
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="Windows-1252"
Have you all seen this.. Is it interesting or an old hat?
http://www.youtube.com/watch?v=tlnbSwkpMcc
Arak Leatham - Web and Desktop Systems Developer
_________________________________________________________________
Make distant family not so distant with Windows Vista? + Windows Live?.
http://www.microsoft.com/windows/digitallife/keepintouch.mspx?ocid=TXT_TAGLM_CPC_VideoChat_distantfamily_012008
------------------------------
Message: 24
Date: Wed, 09 Jan 2008 20:00:22 -0800
From: Jeff Shanab <[EMAIL PROTECTED]>
Subject: Re: [EVDL] E-meter questions
To: ev@lists.sjsu.edu
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
But the input voltage max is I think 40V so hooking it to the bottom 2
batteries works pretty good.
------------------------------
Message: 25
Date: Wed, 9 Jan 2008 23:08:20 -0500
From: "John Mogelnicki" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] DC/DC with flexible pack voltage?
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
Chuck,
I will be running my Z1K with 288volts, using a IOTA 220-55 DC/DC
converter.
I purchased it from:
www.solarseller.com
John Drake Services, Inc.
1427 E. 68 th. Street
Long Beach, CA 90805
(562) 423-4879
I'll install it in 2 weeks after the car gets back.
John
http://evalbum.com/1479
On 1/9/08, Chuck Homic <[EMAIL PROTECTED]> wrote:
>
> For my conversion, I'm planning on a Z1K-HV and PFC-20. This gives me
> some real options on batteries in the future.
>
> The Z1K-HV gives 72-300V range
> The PFC-20 gives 12-360V range
>
> (These are both nominal voltages, right?)
>
> So this combo can handle quite a range of pack voltages. I can have 10
> or 12 or 16 12V lead-acids (25 if I add more wheels to carry the
> weight). Or I can use 93 of the 3.2V50Ah headway packs that are being
> talked about, or some other lithium tech when it becomes affordable
> (maybe my 2nd or 3rd pack). Or something in the middle. And I can use
> these parts on my next EV once the current frame rusts to its grave.
> (This is all speculation. There is a 100% chance my first pack will be
> lead.) Even for the lead pack, having some breathing room will be
> nice. If I find my range to be 2-3 miles shorter than I'd like, I could
> squeeze in "just one more" battery (early enough in the pack's life
> cycle to make that not a terrible idea, hopefully), without blowing any
> voltage limits.
>
> Thing is, I can't find a DC/DC converter that's equally flexible.
>
> The Iota units at evsource are 108-170V or 208-320V. I assume because
> they're just switching power supplies meant for 120 or 240VAC usage.
> The ones EVA sells don't seem to go above 144V. I know this is probably
> the cheapest electrical component, so maybe I shouldn't worry about it
> and buy another one when I change pack voltages in the future. I also
> don't know if these are nominal voltages or absolute limits. If they're
> absolute limits, then a 168V lead acid pack would not be an option with
> the lower voltage Iota unit. The Brusa units look good, but the cost
> more than the Zilla. Ouch. Running without a DC converter is an
> option, but not a good one. A converter that outputs 14V for 10-14V
> input might be a compromise to using the accessory battery on its own,
> and keep the lights up bright. (Costs about $150) But now I'm just
> rambling.
>
> Is anyone else thinking about what they have to do to switch battery
> technology in the future, or are you just expecting to configure future
> packs for the same voltage as your lead packs?
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
------------------------------
Message: 26
Date: Wed, 9 Jan 2008 23:08:14 -0500
From: "Josh Creel" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] DC/DC with flexible pack voltage?
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
what is the efficency of dual DC/DC converters?
----- Original Message -----
From: "Adrian DeLeon" <[EMAIL PROTECTED]>
To: <ev@lists.sjsu.edu>
Sent: Wednesday, January 09, 2008 8:37 PM
Subject: Re: [EVDL] DC/DC with flexible pack voltage?
>> I can't find a DC/DC converter that's equally flexible.
>
> IOTA units (power supply) don't work very well below 110VDC input. When
> loaded, their output voltage drops with decreasing input voltage, but they
> handle the "brownout" very well. Roland uses them in series/parallel in
> his El Camino.
>
> Ditto for the Zivan NG1-DCDC. It holds up better at low input voltage, but
> output voltage still sags.
>
> The Belktronix DC/DC works from 84V to 200V. It will do 250V if you keep a
> 1A or higher load on it. The manual requires precharging BOTH the input
> and output before connecting them, so you may need to use a precharge
> circuit if you regularly disconnect the input OR the output. I think a few
> listers are using them.
>
> If you have an even number of batteries you could connect a DC/DC to each
> half of the pack. A 192V pack would feed two 96V DC/DC units. If their
> output voltage drops slightly with load (most do), they should draw
> similar amounts of current from each pack half.
>
> You could also use the 10-14V input, 14V output converter with a modified
> version of Lee's battery balancer. Divide the traction pack up into 10-14V
> groups and take turns feeding the DC/DC with each group to avoid
> unbalancing the pack.
>
> As a last resort, use another PFC-20/30/50 to keep your 12V battery
> charged. They run 60-250VAC, and SHOULD work with 84-336VDC (check w/
> Manzanita to be sure). Not cheap, but rock solid (if a bit noisy with the
> dual fans).
>
> -Adrian
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
------------------------------
Message: 27
Date: Wed, 9 Jan 2008 20:58:05 -0800
From: "Sam Maynard" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] PM Magnets & Trends
To: "'Electric Vehicle Discussion List'" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"
Your confusion over the importance of the temperature dependence on PM's is
certainly valid, especially in the application you are accustomed to
designing for. While we could reasonably expect a primary drive motor to
experience higher temperature envelopes than a blower motor, we can't
credibly endorse why the DOE says this is an envelope that needs to be
pushed for efficiency or any other reason.
The positive thing I got from this was that the DOE is recognizing electric
propulsion systems as an inevitable evolution in transportation. Maybe the
temperature/Gauss thing is insignificant?
It's kind of like the technical challenge of breaking a quarter mile record
is insignificant to everyday travel, because most people don't care about
how fast they can only go a quarter mile. But it does bring awareness into
the consensual reality that electric drive systems aren't "whimpy", shows
that batteries can dump energy quickly on demand, and in the case of A123's
(or their chemistry and cousins' chemistry to be objective) have very useful
power and energy density for utility transportation applications.
"Confusion and Paradox guard the doorways to understanding"
Oh shut up and lighten up, Maynard.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf
Of Rod Hower
Sent: Wednesday, January 09, 2008 5:21 PM
To: Electric Vehicle Discussion List
Subject: Re: [EVDL] PM Magnets & Trends
Sam,
Thanks for the post.
I'm a little confused though.
I use neodymium-iron-boron magnets in my BLDC motors
that are used in the transportation industry (If you
ride a new Greyhound bus, it has my motors operating
the evaporator and condenser blower/fans for
heating/cooling). The rotors (which have many high
energy magnets) are magnetized after assembling the
rotor (all glue etc is already dried and even if it
was injection molded you wouldn't magnetize the
assembly until it's cool).
Since the BLDC motor is pretty efficient and designed
properly for the loads it's about to see, why would
the magnets ever see anything close to 200C? My
motors usually run at only 30 to 40C above ambient max
seen at the rotor magnets, so it's kind of puzzling.
Not trying to be critical about the post, this is just
a general question posted for anybody on the list for
more information. Just trying to learn new tricks of
the trade for my day job.
Thanks,
Rod
--- Sam Maynard <[EMAIL PROTECTED]> wrote:
> Describing the near future demand for EV's as
> "unstoppable":
>
> http://www.physorg.com/news119117780.html
>
> Coming up next: Advances in troll repellent! :^o
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
------------------------------
Message: 28
Date: Wed, 09 Jan 2008 20:01:12 -0900
From: Mike Willmon <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: "'Electric Vehicle Discussion List'" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
Yep, the Z2K-EHV was one of the first components I received. I ordered it
early but didn't anticipate it would take me this long to get to it.
Mike
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Ian Hooper
> Sent: Wednesday, January 09, 2008 6:09 PM
> To: Electric Vehicle Discussion List
> Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
>
> Man I can't wait to hear how this thing runs, I love the idea of a
> ridiculously quick electric Pinto.. Imagine the fun you could have
> next to a Ferrari at the lights ;)
>
> What controller will you be running, one Z2K?
------------------------------
Message: 29
Date: Wed, 09 Jan 2008 20:06:16 -0900
From: Mike Willmon <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Crazyhorse Pinto Motors are in :-)
To: "'Electric Vehicle Discussion List'" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
Thanks Dennis, I hope to be posting times against your Smokescreen soon.
It will be interesting to compete since I had made the decision to go with
the two smaller motors unlike the one 1 large motor like you did for your
truck. It will be some good comparisons :-)
The day will one day come when I'm all tuned up that I'll drop the stock
Ford 8" housing back in to swoop down on Wayland's SC/A record, me hopes :-)
> [EMAIL PROTECTED] wrote"
> >
> Looking good Mike,I think you will be another 1/4 mile heavy hitter!! I
> have
> always liked the (Crazy Horse name) Dennis Berube
------------------------------
Message: 30
Date: Thu, 10 Jan 2008 00:21:31 -0500
From: "Bob Rice" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EV Digest, Vol 6, Issue 28
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
----- Original Message -----
From: "Lee Hart" <[EMAIL PROTECTED]>
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Sent: Wednesday, January 09, 2008 10:11 PM
Subject: Re: [EVDL] EV Digest, Vol 6, Issue 28
> Chip Gribben wrote:
>> When I was living in a townhouse development several jokesters would
>> reach into my EV and turn the lights on while it was parked or
>> charging, during the daytime! I'm betting these fools were thinking
>> if they turn my lights on it would drive down the propulsion batteries.
>> It took a few times of this before I took the time to close the
>> windows and lock the doors. But then people would unplug the car.
>
> I got my ComutaVan with only an ignition key (no door keys), so I
> couldn't lock it. I went to an electrical supply house and got a big
> standard "Danger -- High Voltage" sign and put that in the window.
> Amazingly, it worked! People would steer a wide berth around it. They
> wouldn't even step in a puddle that happened to extend under the car.
>
> I once saw a woman and child approaching the car in a mall parking lot.
> The child was fascinated and headed for the ComutaVan like a magnet. But
> his mother saw the sign, and frantically pulled him away! :-)
>
> -- Hi EVerybody;
Remonds me of my Electric Fuel Propulsion daze in Inner City Detoilet.
Cruising there in one of their Renault R-10 Mars 2 conversions.Free Car Wash
with fillup"Let's hit them! Pull in and fill the Briggs and Stratten fuel
tank for the Gas heater! About 8 cent fillup! Usually they, the gas station
guyz wre so enchanted with the electric thsat they would let us go through
the car wash. But stand at a Safe (Nebraska?) distance from the car. Those
High Voltage signs sure had an effect there, those who COULD read? Best
lines, upon opening the hood;" Yo need all dem batteries to Start that?
Electric car was an alian concept in THOSE 'hoods!The DANGER !100000000
Ohms" signs we had on the under the hood, space more than once the dude
dropped the hood and fled!Could park pretty much anywhere in Detoilet,
nobody would bother the electric! Amps, Ohms Volts Dolts Smamps All the same
<g>!Gas was 23 sense a gal, so EV's wern't taken seriously.
Seeya
Bob
------------------------------
Message: 31
Date: Wed, 09 Jan 2008 21:23:36 -0800
From: Metric Mind <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EVision Heaven
To: [EMAIL PROTECTED], Electric Vehicle Discussion List
<ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=windows-1252; format=flowed
Bill,
[EMAIL PROTECTED] wrote:
> Victor,
> I have an EVision question, and I thought I'd ask it here on the EVDL so
> others could benefit from your answer. My traction pack has an odd number
> of batteries, so I can't do an exact center tap for the EVision. Will the
> EVision work without the center tap?
>
> Thanks.
>
> Bill Dennis
It will work, no problem, but of course battery balance check
on the analog bar will always be off-center by half of the battery
voltage (1 LED = 0.5V in this mode).
Easy way to circumvent the problem is to divide the voltage of the
middle battery in half by two high enough value resistors thus
creating exact electrical mid point. Since impedance of measuring
circuit is >3MOhm, you can use two 10k resistors for 12V batteries
and 3.3k resistors for lithiums. The current through them is
negligible (less then 1mA) to cause any unbalance. 0.25W resistors
are fine for this:
|
| +
-------
---
| -
| 10k 1%
o-------^^^^---+
| + | "1/2" of the pack measurement (to EVision)
------- o-------------------------------------->
--- |
| - 10k 1% |
o-------^^^^---+
|
| +
-------
---
| -
|
Let me know how it works out for you.
Victor
------------------------------
Message: 32
Date: Wed, 09 Jan 2008 21:53:04 -0700
From: Bill Dennis <[EMAIL PROTECTED]>
Subject: Re: [EVDL] battery box doesn't fit
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Mike,
Did you receive the images that I sent you off-list?
Bill Dennis
------------------------------
Message: 33
Date: Wed, 9 Jan 2008 21:55:42 -0800 (GMT-08:00)
From: Lee Hart <[EMAIL PROTECTED]>
Subject: Re: [EVDL] E-meter questions
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=UTF-8
From: Jeff Shanab
> But the input voltage max is I think 40V so hooking it to the bottom
> 2 batteries works pretty good.
It works as far as the E-meter is concerned. The problem is that it tends to
unbalance the battery pack, since E-meter power comes from only the lowest 24v
end of the string.
--
"Excellence does not require perfection." -- Henry James
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart-at-earthlink.net
------------------------------
Message: 34
Date: Wed, 09 Jan 2008 21:57:00 -0800
From: Metric Mind <[EMAIL PROTECTED]>
Subject: Re: [EVDL] EVision Heaven
To: Electric Vehicle Discussion List <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Morgan and all,
EVision's ground connection is referenced to the vehicle chassy at
the point of negative aux. 12V battery terminal (Kelvin connection).
If you use common speed sensor and lousy ground connection between
aux -12V and chassy and between sensor common and chassy, count
readout may get unstable as you may inject too much noise in the ground
loop you'll be creating.
If you use suggested below circuit, reference second ground to the
EVision ground. Note, output *must* be scaled to 5V. R5 pull up
resistor is internal to the EVision, you won't need it in this circuit.
Connect "Second +12V" (see schematic below) to +5V speed sensor
supply, output to "Speed" input of EVision and Second ground to
"Speed" ground. Remove R5. With powerful enough opto U1 you might
be able use its output (collector) directly, eliminating R3, R4,
R5 and Q2, but keep in mind that internal pull up resistor is
470 Ohm, so the photo transistor must be able to sink about
11mA comfortably.
Don't feed any 12V pulses to EVision's speed sensor
input! For the next rev I'll make this input 12V tolerant,
but survival of current version only depends on the quality of input
protection diodes internal to the processor IC. I wouldn't test it...
Thank you Morgan for suggested circuit.
--
Victor
'91 ACRX - something different
Morgan LaMoore wrote:
> On 1/9/08, John Wayland <[EMAIL PROTECTED]> wrote:
>> I agree with you, that there's probably a circuit that can be designed
>> to make a duplicate 2nd channel output from the one sensor. Care to
>> design it? You could probably market it to those who will be adding an
>> EVision to their Zilla-equipped EVs.
>
> The circuit required is very simple, just an opto-isolator with some
> drive circuitry. Anyone who can solder 0.1" pitch parts can make one
> on a protoboard.
>
> Here's one I drew up quick:
>
> U1
> ____________________
> | ________|_________________ Second +12V
> | || | | R3 | |
> R1 | || | __|_____^^^__| >
> Main +12V ______^^^____|__ || _|_ | | | >R5
> | | || / \ | | | >
> | _|_ || --- / | | ___|___ Output
> | \ / || | |/ | | Q2 |
> | _V_ || |__| | | |--|
> | | || | | |---|
> __|__| || |\ | > |->|
> | | || > | >R4 |
> Input ___ Q1 | | || | | > |
> | |--| | || |__|__|______|_______ Second Ground
> |---| | || |
> | |->| |____________________|
> > |
> >R2 |
> > |
> Main Ground ___|______|
>
> It would have looked a lot simpler if I hadn't drawn the internal
> diagram of the opto isolator.
>
> Here's the parts:
>
> R1: 1k
> R2,R4: 100k
> R3: 10k
> R5: 2k, 1/4W
> Q1, Q2: 2N7002
> U1: 6N135
>
> All of that should cost less than $4 from digikey. You might want to
> add a capacitor to the power supply on each side; that would add about
> $0.50 more. The perfboard you mount it to will be about half the cost
> of this device!
>
> Also, if you could find the right opto-isolator, you could probably do
> away with the transistors and most of the resistors. This opto is
> really cheap, though.
>
> I put the transistor on the input because I'm not sure whether the RPM
> sensor can provide the 10mA required by the opto. Also, if the RPM
> sensor provides a TTL output, you should connect R5 to +5V instead of
> +12V secondary.
>
> -Morgan LaMoore
>
> _______________________________________________
> For subscription options, see
> http://lists.sjsu.edu/mailman/listinfo/ev
>
>
------------------------------
Message: 35
Date: Wed, 9 Jan 2008 22:02:54 -0800
From: "(-Phil-)" <[EMAIL PROTECTED]>
Subject: [EVDL] 50 mile commute EV in GB
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Can anyone recommend a second-hand EV for someone in GB capable of a 50 mile
commute? Maybe somewhere else in the EU?
What are the range of the Peugeot/Citroen Ni-Cd equipped cars? Is there a
site where EV's are bought/sold in Europe?
-Phil
------------------------------
Message: 36
Date: Wed, 9 Jan 2008 21:57:40 -0900
From: "m gol" <[EMAIL PROTECTED]>
Subject: Re: [EVDL] Charger
To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
Could you use two of these surplus center transformers in parallel to get
higher amps?
On Jan 9, 2008 6:53 AM, Lee Hart <[EMAIL PROTECTED]> wrote:
> dave cover wrote:
> >> On Jan 4, 2008 12:11 PM, damon henry <[EMAIL PROTECTED]> wrote:
> >>
> >>> In fact I just ordered another one. Now you may say to yourself, well
> it
> >>> is only a 72 volt charger which is exactly what I was saying to myself
> when
> >>> it would not work with my 80 volt pack of NiCads on my truck, but then
> we
> >>> had the thread about how to use an isolation transformer as an
> >>> autotransformer and suddenly it all worked out. All you've got to do
> is
> >>> bump the line voltage up about 20 volts and you could use this with
> your 90
> >>> volt pack.
> >
> > Alright, I've been following the transformer threads, but this brings
> > up another question for me. The Surplus Center transformer you mention
> > takes AC in and bumps it up around 15 VAC. Are you saying you use this
> > to bump up the Schumacher 72 VDC output? Or are you bumping the input
> > to the Schumacher and getting a bump in DC output?
>
> Either is possible. Either boost the AC line voltage going into the
> primary of the Schumacher charger, or put put the boost transformer
> after the Schumacher's transformer secondary but before its rectifiers.
>
> But note that a transformer winding has a maximum voltage that you can
> apply (at a given frequency). A "120 volt" winding can handle maybe a
> 10-20% overvoltage, but any more and the core saturates and it overheats
> very quickly. A 15% overvoltage is in the range where it might work, or
> it might make the transformer overheat. You'll have to try it and see.
>
> --
> 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
>
------------------------------
_______________________________________________
EV@lists.sjsu.edu
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
End of EV Digest, Vol 6, Issue 30
*********************************
