EV Digest 4105
Topics covered in this issue include:
1) Re: Battery resting voltage...
by M Bianchi <[EMAIL PROTECTED]>
2) Re: What are the upper voltage limits of DC motors?
by "Peter VanDerWal" <[EMAIL PROTECTED]>
3) Re: 42-volt starting batteries
by "Peter VanDerWal" <[EMAIL PROTECTED]>
4) RE: LB-20 Isolated?
by "Peter VanDerWal" <[EMAIL PROTECTED]>
5) Re: World's First Solar-Powered Drag Race
by "Peter VanDerWal" <[EMAIL PROTECTED]>
6) Re: Synthetic oil in Tranny & Diff.
by "Patrick Maston" <[EMAIL PROTECTED]>
7) Re: EV1 vigil in Burbank, Calif.
by Chip Gribben <[EMAIL PROTECTED]>
8) Fwd: Re: MAX712 IC to control NiCad charging.
by Dave Cover <[EMAIL PROTECTED]>
9) RE: EV1 vigil in Burbank, Calif.
by "Ivo Jara" <[EMAIL PROTECTED]>
10) Re: Chevy S-10EV
by [EMAIL PROTECTED]
11) inexpensive electric bike conversion kit
by "Ivo Jara" <[EMAIL PROTECTED]>
12) ebike conversion
by "Ivo Jara" <[EMAIL PROTECTED]>
13) Need Vicor DC/DC
by James Jarrett <[EMAIL PROTECTED]>
14) Re: Need Vicor DC/DC
by John Lussmyer <[EMAIL PROTECTED]>
15) Re: Need Vicor DC/DC
by Travis Raybold <[EMAIL PROTECTED]>
16) Re: Need Vicor DC/DC
by James Jarrett <[EMAIL PROTECTED]>
17) Re: MAX712 IC to control NiCad charging.
by "Lawrence Rhodes" <[EMAIL PROTECTED]>
18) Re: Need Vicor DC/DC
by "Peter VanDerWal" <[EMAIL PROTECTED]>
19) inexpensive ebike conversion kit
by "Ivo Jara" <[EMAIL PROTECTED]>
20) RE: Need Vicor DC/DC
by "Ivo Jara" <[EMAIL PROTECTED]>
21) Re: inexpensive ebike conversion kit
by richard ball <[EMAIL PROTECTED]>
22) RE: EV1 vigil in Burbank, Calif.
by Ken Trough <[EMAIL PROTECTED]>
23) Re: She's dead Jim
by "damon henry" <[EMAIL PROTECTED]>
24) Re: EV1 vigil in Burbank, Calif.
by "Tim Humphrey" <[EMAIL PROTECTED]>
25) RE: She's dead Jim
by "Brown, Jay" <[EMAIL PROTECTED]>
26) Re: She's dead Jim
by Rod Hower <[EMAIL PROTECTED]>
27) RE: She's dead Jim
by "Roger Stockton" <[EMAIL PROTECTED]>
--- Begin Message ---
Lee Hart wrote:
> You can send one of your meters to a lab to be calibrated. Then use it
> to check and calibrate the rest.
>
> You can buy a "standard cell" which is a battery specifically made to be
> a voltage reference and not to deliver power. It will have the voltage
> marked right on it to 4-5 significant digits. Basically, it is two very
> pure metals in a a pure electrolyte solution, so it delivers the voltage
> you see in an electromotive table of the elements.
> :
Lee,
Several of these calibration techniques are based on a single value. If one
tweaks a meter for that measurement, what is the chance that the calibration is
"pretty good" over the entire range of that range-setting and all the other
range settings? Inquiring minds want to know ...
--
Mike Bianchi
17th Annual Tour de Sol
May 13-16, 2005 in Saratoga and Albany, NY
Featuring New Events, Competitions, Activities Leading the Way to a
Sustainable Energy and Transportation Future, A Green "Car Show" and More
www.TourDeSol.org
--- End Message ---
--- Begin Message ---
> - There are lots of PM motors with printed circuit rotors; no
> iron and no windings in the armatures.
> - Aluminum instead of copper is used in some high-volume motor
> windings. Besides being lighter and cheaper, windings can be
> cast in place rather than wound.
While these two items reduce production costs, I wouldn't claim they are
an improvement on the motor, in fact rather the contrary. Both of these
REDUCE motor efficiency.
> In a related area, I wish we had more choices in separately excited
> motors. Brushed DC motors with adjustable fields and interpoles can do a
> very good job with very simple controllers.
Maybe we could talk Warfield into building some. Of course they would
probably want a demonstrated market first.
--- End Message ---
--- Begin Message ---
>> I don't think it's pessimistic to say the truth. People have been
>> building motors in their garages continously for over a hundred years,
>> ditto with controllers in one form or another. I don't know of anyone
>> that has tried building EV batteries in their garage in the past 1/4
>> century, there must be a reason. Seems to me that the most likely
>> reason is that it's just not worth it (no advantage). The fact that
>> nobody is willing to try it, pretty conclusively proves my point
>
> Peter, your reasoning is flawed. You are taking an egocentric view, and
> assuming that everyone's situation is just like yours. If you don't do
> it, no one can do it. If you don't know how, no one knows how. If you've
> never heard of anyone doing it, then it's never been done.
What is it with you people??!!?? You keep trying to put words into my
mouth and completely ignore it when I correct yo.
I NEVER SAID IT WAS IMPOSSIBLE. I NEVER SAID IT CAN'T BE DONE!!!!!
What I said was that, as far as I know, nobody IS doing it, which is a
pretty darn good indication that it's not worth doing.
I still firmly believe that if it was worth doing then somebody,
somewhere, would be doing it.
What I am doing, and what I'm capable of doing, has absolutely no bearing
on these statements and doesn't indicate anything egocentric.
--- End Message ---
--- Begin Message ---
Sure, provided that you could find a 120V to 140V(give or take)
transformer rated at 30 amps or more on the secondary.
> Thanks for the picture. I understand now. So would it work to replace
> the
> LB-20 with a real boost transformer?
>
> Bill Dennis
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Peter VanDerWal
> Sent: Wednesday, February 16, 2005 4:59 PM
> To: ev@listproc.sjsu.edu
> Subject: Re: LB-20 Isolated?
>
>>
>> "The LB-20 will handle the maximum 20 ampere charging current of the
>> BC-20.
>> It consists of a transformer whose isolated secondary provides a 20 VAC
>> voltage which is connected in series with the primary input voltage to
>> the
>> BC-20 just before the coil, thus raising the BC-20 input voltage to 140
>> VAC."
>>
>> This seems to indicate that the LB-20 is an isolated transformer, not an
>> autotransformer. Am I reading that correctly?
>>
>
> Since the secondary of the LB-20 is wired in series with the BC-20 and
> directly connected to the line, the whole thing ends up being
> non-isolated.
>
> In fact, the way it's wired up, one side of the LB-20 primary is directly
> connected to one side of the LB-20 secondary (defeating your isolation).
> The other side of the LB-20 secondary is connected to the BC-20, with the
> other side of the BC-20 directly connected to the remaining side of the
> LB-20 primary.
> Hmm let me give some of this ASCII artwork a try.
>
>
> LB-20
> ----------+---+
> *P S
> P S
> P S*
> ----------+ +----BC-20--+
> | |
> +---------------+
>
>
> Anyway, the net effect is that the LB-20 functions as an autotransformer.
>
>
>
>
--- End Message ---
--- Begin Message ---
> It seems to me that there are two ways to utilize solar energy,
> in a rapid enough fassion to be of use in a race that is.
> 1. PV's ~13% effecient Solar to Electricity, very rapid conversion!
> 2. Heat engine. Potentially more effecient, but far less rapid.
>
> Option #1 is probably the easiest to implament. But I like
> Option #2 if for no other reason than that it's a lesser known method.
> If #2 were 26% or 52% eff, thus 2x to 4x the power could it overcome
> the startup time penelties of a few seconds or minutes? <ponders>
There are PV cells available that are over 20% efficient.
I've never heard of any heat engine hitting 52%, do you have a reference?
I know they have a 10kva solar generator at Ft Huachuca that used
something like a sterling engine. When it worked, it was supposed to be
over 30% efficient, but that was solar to electricicty. Going solar to
mechanical movement would have eliminated a conversion step and have
higher efficiency.
As for the slow startup time, well it's a drag race....rev the engine and
dump the clutch ;-)
--- End Message ---
--- Begin Message ---
Supposedly the EP lubes have more sulfur in them, which is corrosive to
the synchronizers in transmissions, and why they are recommended only
for axles.
Patrick
>>> [EMAIL PROTECTED] 2/15/05 4:07:31 PM >>>
Roland would you say this synthetic Gear oil helped range? Thanks
Lawrence
Rhodes......
----- Original Message -----
From: "Roland Wiench" <[EMAIL PROTECTED]>
To: <ev@listproc.sjsu.edu>
Sent: Tuesday, February 15, 2005 7:51 AM
Subject: Re: Synthetic oil in Tranny & Diff.
> Valvoline has a Full synthetic Gear Oil - SAE 75W-90 which is call
> SynPower.
>
> Is for all standard and limited slip hybroid differentials. I also
use it
> in my standard transmission.
>
> http://www.valvoline.com
>
> Roland
>
>
> ----- Original Message -----
> From: "Lawrence Rhodes" <[EMAIL PROTECTED]>
> To: "Electric Vehicle Discussion List" <ev@listproc.sjsu.edu>
> Sent: Tuesday, February 15, 2005 8:01 AM
> Subject: Synthetic oil in Tranny & Diff.
>
>
>> The Electravan 750 manual specifies 90 Weight E.P. (Extreme
pressure)
>> Amsoil doesn't make this oil. Is there a Synthetic that has this
spec.?
>> The book specifies "Axle" for the oil in the differencial. What is
Axle
>> oil? I was going with their recomendation of the 75-90 Gear Lube.
>> Lawrence
>> Rhodes
>> Bassoon/Contrabassoon
>> Reedmaker
>> Book 4/5 doubler
>> Electric Vehicle & Solar Power Advocate
>> [EMAIL PROTECTED]
>> 415-821-3519
>>
>>
>
--- End Message ---
--- Begin Message ---
Brigham Young University has a silver GM EV-1 powered by Ultra capacitors
with drag tires on the front. The ultra caps are dump charged with red tops
before each run. It will be racing at the NEDRA Wicked Watts April 9 in Las
Vegas and the NEDRA Power of DC June 11 in Maryland.
There are some EV-1s in upper state New York being driven by state
employees. Some of those were EV-1s that were previously leased by people in
California.
Chip
ScooterWerks
http://www.scooterwerks.com
NEDRA
http://www.nedra.com
EVA/DC
http://www.evadc.org
On 2/17/05 9:13 AM, "Electric Vehicle Discussion List"
<ev@listproc.sjsu.edu> wrote:
> From: Lightning Ryan <[EMAIL PROTECTED]>
> Date: Wed, 16 Feb 2005 20:04:34 -0800
> To: ev@listproc.sjsu.edu
> Subject: Re: EV1 vigil in Burbank, Calif.
>
> Back to the topic, I was just rescently remenising over my
> little trip to LA to drive a rented EV1 arround for a day.
>
> I got to thinking, Darn, you know, I should have called up
> Jay Leno to see if he wanted to have some fun with the EV1.
>
> ( Since GM wouldn't sell one and it's faster than his Baker )
> ( Jay probably has better video cameras than I did aswell )
> ( He may have been down for something like that )
>
> It would have been fun for us to rent a pair of them and
> cruse arround LA with a video crew in toe. Maybe visit
> the drag strip, take part in an autocross EVent. <Sigh>
>
> Imagine the kind of Late Night Sketch we could have put
> together, probably would have been the most air time
> that car ever got. But like a vigil, it doesn't seem
> to matter at this point, they can't be un-crushed.
>
> Anyway, does anyone know if ANY EV1's have survived?
> I recall a university that has a hopped up EV1, but
> how about any stock EV1's, have ALL of the leases ended?
>
> L8r
> Ryan
--- End Message ---
--- Begin Message ---
--- Philippe Borges <[EMAIL PROTECTED]> wrote:
>
> MAX712 is a nicad charging brain so all you need is already here just read
> datasheet, plus this one http://pdfserv.maxim-ic.com/en/an/AN3282.pdf to
> accomodate any cells number, et voilà :^)
>
Ok, I have a few questions from a non-EE. The docs show a max charging curent
of 500mA. They also
show how to fool the charger so it can handle 22 cells.
1. Can this be scaled up to handle 200 cells charging at 10 amps? (2 120 volt
strings)
2. Is it just a matter of sizing the pass transistor?
3. Is anyone else going to try this?
Dave Cover
--- End Message ---
--- Begin Message ---
that's odd ain't it ? how is it that those people got those EV-1s ?
They were supposed to have been destroyed, or sitting in the desert or am i
wrong ?
Ivo-
-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre
de Chip Gribben
Enviado el: jueves, 17 de febrero de 2005 13:15
Para: ev@listproc.sjsu.edu
Asunto: Re: EV1 vigil in Burbank, Calif.
Brigham Young University has a silver GM EV-1 powered by Ultra capacitors
with drag tires on the front. The ultra caps are dump charged with red tops
before each run. It will be racing at the NEDRA Wicked Watts April 9 in Las
Vegas and the NEDRA Power of DC June 11 in Maryland.
There are some EV-1s in upper state New York being driven by state
employees. Some of those were EV-1s that were previously leased by people in
California.
Chip
ScooterWerks
http://www.scooterwerks.com
NEDRA
http://www.nedra.com
EVA/DC
http://www.evadc.org
On 2/17/05 9:13 AM, "Electric Vehicle Discussion List"
<ev@listproc.sjsu.edu> wrote:
> From: Lightning Ryan <[EMAIL PROTECTED]>
> Date: Wed, 16 Feb 2005 20:04:34 -0800
> To: ev@listproc.sjsu.edu
> Subject: Re: EV1 vigil in Burbank, Calif.
>
> Back to the topic, I was just rescently remenising over my
> little trip to LA to drive a rented EV1 arround for a day.
>
> I got to thinking, Darn, you know, I should have called up
> Jay Leno to see if he wanted to have some fun with the EV1.
>
> ( Since GM wouldn't sell one and it's faster than his Baker )
> ( Jay probably has better video cameras than I did aswell )
> ( He may have been down for something like that )
>
> It would have been fun for us to rent a pair of them and
> cruse arround LA with a video crew in toe. Maybe visit
> the drag strip, take part in an autocross EVent. <Sigh>
>
> Imagine the kind of Late Night Sketch we could have put
> together, probably would have been the most air time
> that car ever got. But like a vigil, it doesn't seem
> to matter at this point, they can't be un-crushed.
>
> Anyway, does anyone know if ANY EV1's have survived?
> I recall a university that has a hopped up EV1, but
> how about any stock EV1's, have ALL of the leases ended?
>
> L8r
> Ryan
--
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--- End Message ---
--- Begin Message ---
I'm sure others will pipe in with more issues, but here are some big ones:
1. The PIM has sense wires going to each module. So it's expecting
26 sense wires to show 12v nominal. If even one of these shows lower
than a certain threshhold, the whole vehicle is put into reduced
performance mode.
2. The S-10EV charger is designed for sealed lead acid. It will
likely undercharge floodeds.
3. The instrumentation, like the SOC gauge, won't work.
I believe the vehicle won't even start with a lower voltage anyway.
Richard
On Wed, 16 Feb 2005 22:25:05 -0700, Rush wrote
> Hello,
>
> Does anybody know if there is some more info about the S-10EV's other than at
> the www.evbones.com website?
>
> Specifically the report http://www.evbones.com/battery.html. says that the
> VRLA batteries only get about 40 miles on a charge. At
> http://www.evbones.com/battery.html there is a photo of how the batteries fit
> between the frame rails. The Pack voltage is 312 V with 30 Ah at a C/3 rate.
> How can I increase the range?
>
> If I convert the batteries to T-105s, in the space where the batteries are
> now I can fit 22 so I'll get a 132 V pack, and I can add some more in the
> bed. I know the 105's are rated at 225 Ah for C/20, what I don't know is how
> to figure out the Ah to compare them with the 30 Ah C/3 rate. Another
> question is - will the controller handle the lower voltage?
>
> Any help would be appreciated.
>
> Thanks
> Rush
>
> --
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.300 / Virus Database: 265.8.8 - Release Date: 2/14/2005
>
>
--- End Message ---
--- Begin Message ---
* LP8.2: HTML/Attachments detected, removed from message *
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--- Begin Message ---
* LP8.2: HTML/Attachments detected, removed from message *
--- End Message ---
--- Begin Message ---
After years of hearing me harp on EV's my boss actually just bought a
Corbin on ebay!
It's the one with a dead DC/DC converter:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4525989787&category=6737
Does anyone have a used Vicor, or something compatible for a reasonable
price?
James
--- End Message ---
--- Begin Message ---
You may want to try on the SparrowEV Yahoo group as well.
There is at least 1 person that replaced the DC-DC with a 14th
yellowtop. (He did have to setup a separate charger for it as well.)
At 09:48 AM 2/17/2005, you wrote:
After years of hearing me harp on EV's my boss actually just bought a
Corbin on ebay!
Does anyone have a used Vicor, or something compatible for a reasonable
price?
--- End Message ---
--- Begin Message ---
on the listing in the questions section is a guy offering one for $350...
John Lussmyer wrote:
You may want to try on the SparrowEV Yahoo group as well.
There is at least 1 person that replaced the DC-DC with a 14th
yellowtop. (He did have to setup a separate charger for it as well.)
At 09:48 AM 2/17/2005, you wrote:
After years of hearing me harp on EV's my boss actually just bought a
Corbin on ebay!
Does anyone have a used Vicor, or something compatible for a reasonable
price?
.
--- End Message ---
--- Begin Message ---
Yeah, we saw that and my boss has sent him an e-mail, but he has not
responded as yet. Thought I'd do a little hunting in the meantime.
James
On Thu, 2005-02-17 at 13:08, Travis Raybold wrote:
> on the listing in the questions section is a guy offering one for $350...
>
> John Lussmyer wrote:
>
> > You may want to try on the SparrowEV Yahoo group as well.
> > There is at least 1 person that replaced the DC-DC with a 14th
> > yellowtop. (He did have to setup a separate charger for it as well.)
> >
> > At 09:48 AM 2/17/2005, you wrote:
> >
> >> After years of hearing me harp on EV's my boss actually just bought a
> >> Corbin on ebay!
> >> Does anyone have a used Vicor, or something compatible for a reasonable
> >> price?
> >
> >
> >
> > .
> >
>
--- End Message ---
--- Begin Message ---
Does that work for you Rich Rudman????? LR........
----- Original Message -----
From: "Philippe Borges" <[EMAIL PROTECTED]>
To: <ev@listproc.sjsu.edu>
Sent: Thursday, February 17, 2005 3:53 AM
Subject: Re: MAX712 IC to control NiCad charging.
MAX712 is a nicad charging brain so all you need is already here just read
datasheet, plus this one http://pdfserv.maxim-ic.com/en/an/AN3282.pdf to
accomodate any cells number, et voilà :^)
Philippe
Et si le pot d'échappement sortait au centre du volant ?
quel carburant choisiriez-vous ?
http://vehiculeselectriques.free.fr
Forum de discussion sur les véhicules électriques
http://vehiculeselectriques.free.fr/Forum/index.php
----- Original Message -----
From: "Lawrence Rhodes" <[EMAIL PROTECTED]>
To: "Electric Vehicle Discussion List" <ev@listproc.sjsu.edu>
Sent: Thursday, February 17, 2005 5:13 AM
Subject: Re: MAX712 IC to control NiCad charging.
http://pdfserv.maxim-ic.com/en/ds/1666.pdf
This is what I got. I can only think they must use a shunt or some other
device to work with high voltages and more cells or possibly multiple
units.
Wonder if it could be the brains for a PFC???? LR>..........
----- Original Message -----
From: "Peter VanDerWal" <[EMAIL PROTECTED]>
To: <ev@listproc.sjsu.edu>
Sent: Wednesday, February 16, 2005 4:22 PM
Subject: Re: MAX712 IC to control NiCad charging.
> Did you try googling MAX712?
> I did and one of the first responses shows a circuit diagram.
>
>> Does anyone know how to use this IC to control NiCad Charging? The
>> MAX712.
>> That would be for flooded NiCads.
>> Lawrence Rhodes
>> Bassoon/Contrabassoon
>> Reedmaker
>> Book 4/5 doubler
>> Electric Vehicle & Solar Power Advocate
>> [EMAIL PROTECTED]
>> 415-821-3519
>>
>>
>
--- End Message ---
--- Begin Message ---
How about checking with the company that bought up all the parts and is
now supporting them?
Sorry can't remember the name of the company, but it was posted to the
list a week or so back.
> Yeah, we saw that and my boss has sent him an e-mail, but he has not
> responded as yet. Thought I'd do a little hunting in the meantime.
>
> James
>
> On Thu, 2005-02-17 at 13:08, Travis Raybold wrote:
>> on the listing in the questions section is a guy offering one for
>> $350...
>>
>> John Lussmyer wrote:
>>
>> > You may want to try on the SparrowEV Yahoo group as well.
>> > There is at least 1 person that replaced the DC-DC with a 14th
>> > yellowtop. (He did have to setup a separate charger for it as well.)
>> >
>> > At 09:48 AM 2/17/2005, you wrote:
>> >
>> >> After years of hearing me harp on EV's my boss actually just bought a
>> >> Corbin on ebay!
>> >> Does anyone have a used Vicor, or something compatible for a
>> reasonable
>> >> price?
>> >
>> >
>> >
>> > .
>> >
>>
>
>
--- End Message ---
--- Begin Message ---
It's the third time I send this message, I think I had my format in html, so
the mail server reejected it, let's see if now i can get the text through.
I found a chinese manufacturesr that sells an electric bike conversion kit
at a very good prize, since I live in Chile, and the weather is great most
of the year (it rains once or twice a year), I thought of converting my
mountain bike and my wife's.
The thing is so cheap that it brings a little distrust in me.
What do you think about it, do you think it will perform as it advertises
???
Here's the link:
http://www.goldenmotor.com/
Ivo.
-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre
de Lawrence Rhodes
Enviado el: jueves, 17 de febrero de 2005 15:42
Para: ev@listproc.sjsu.edu
CC: Rich Rudman
Asunto: Re: MAX712 IC to control NiCad charging.
Does that work for you Rich Rudman????? LR........
----- Original Message -----
From: "Philippe Borges" <[EMAIL PROTECTED]>
To: <ev@listproc.sjsu.edu>
Sent: Thursday, February 17, 2005 3:53 AM
Subject: Re: MAX712 IC to control NiCad charging.
> MAX712 is a nicad charging brain so all you need is already here just read
> datasheet, plus this one http://pdfserv.maxim-ic.com/en/an/AN3282.pdf to
> accomodate any cells number, et voilà :^)
>
> Philippe
>
> Et si le pot d'échappement sortait au centre du volant ?
> quel carburant choisiriez-vous ?
> http://vehiculeselectriques.free.fr
> Forum de discussion sur les véhicules électriques
> http://vehiculeselectriques.free.fr/Forum/index.php
>
>
> ----- Original Message -----
> From: "Lawrence Rhodes" <[EMAIL PROTECTED]>
> To: "Electric Vehicle Discussion List" <ev@listproc.sjsu.edu>
> Sent: Thursday, February 17, 2005 5:13 AM
> Subject: Re: MAX712 IC to control NiCad charging.
>
>
>> http://pdfserv.maxim-ic.com/en/ds/1666.pdf
>> This is what I got. I can only think they must use a shunt or some other
>> device to work with high voltages and more cells or possibly multiple
> units.
>> Wonder if it could be the brains for a PFC???? LR>..........
>> ----- Original Message -----
>> From: "Peter VanDerWal" <[EMAIL PROTECTED]>
>> To: <ev@listproc.sjsu.edu>
>> Sent: Wednesday, February 16, 2005 4:22 PM
>> Subject: Re: MAX712 IC to control NiCad charging.
>>
>>
>> > Did you try googling MAX712?
>> > I did and one of the first responses shows a circuit diagram.
>> >
>> >> Does anyone know how to use this IC to control NiCad Charging? The
>> >> MAX712.
>> >> That would be for flooded NiCads.
>> >> Lawrence Rhodes
>> >> Bassoon/Contrabassoon
>> >> Reedmaker
>> >> Book 4/5 doubler
>> >> Electric Vehicle & Solar Power Advocate
>> >> [EMAIL PROTECTED]
>> >> 415-821-3519
>> >>
>> >>
>> >
>>
>
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--- End Message ---
--- Begin Message ---
Try here
http://www.ultravolt.com/?source=overture&OVRAW=dc%20dc%20converter&OVKEY=dc
%20dc%20converter&OVMTC=standard
good luck
Ivo
-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre
de James Jarrett
Enviado el: jueves, 17 de febrero de 2005 15:43
Para: ev@listproc.sjsu.edu
Asunto: Re: Need Vicor DC/DC
Yeah, we saw that and my boss has sent him an e-mail, but he has not
responded as yet. Thought I'd do a little hunting in the meantime.
James
On Thu, 2005-02-17 at 13:08, Travis Raybold wrote:
> on the listing in the questions section is a guy offering one for $350...
>
> John Lussmyer wrote:
>
> > You may want to try on the SparrowEV Yahoo group as well.
> > There is at least 1 person that replaced the DC-DC with a 14th
> > yellowtop. (He did have to setup a separate charger for it as well.)
> >
> > At 09:48 AM 2/17/2005, you wrote:
> >
> >> After years of hearing me harp on EV's my boss actually just bought a
> >> Corbin on ebay!
> >> Does anyone have a used Vicor, or something compatible for a reasonable
> >> price?
> >
> >
> >
> > .
> >
>
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--- Begin Message ---
the cast wheel looks like the ones fitted to a e bike my mate dave got from
china as a demo
god it was slow !
reb
Ivo Jara <[EMAIL PROTECTED]> wrote:
It's the third time I send this message, I think I had my format in html, so
the mail server reejected it, let's see if now i can get the text through.
I found a chinese manufacturesr that sells an electric bike conversion kit
at a very good prize, since I live in Chile, and the weather is great most
of the year (it rains once or twice a year), I thought of converting my
mountain bike and my wife's.
The thing is so cheap that it brings a little distrust in me.
What do you think about it, do you think it will perform as it advertises
???
Here's the link:
http://www.goldenmotor.com/
Ivo.
-----Mensaje original-----
De: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] nombre
de Lawrence Rhodes
Enviado el: jueves, 17 de febrero de 2005 15:42
Para: ev@listproc.sjsu.edu
CC: Rich Rudman
Asunto: Re: MAX712 IC to control NiCad charging.
Does that work for you Rich Rudman????? LR........
----- Original Message -----
From: "Philippe Borges"
To:
Sent: Thursday, February 17, 2005 3:53 AM
Subject: Re: MAX712 IC to control NiCad charging.
> MAX712 is a nicad charging brain so all you need is already here just read
> datasheet, plus this one http://pdfserv.maxim-ic.com/en/an/AN3282.pdf to
> accomodate any cells number, et voilà :^)
>
> Philippe
>
> Et si le pot d'échappement sortait au centre du volant ?
> quel carburant choisiriez-vous ?
> http://vehiculeselectriques.free.fr
> Forum de discussion sur les véhicules électriques
> http://vehiculeselectriques.free.fr/Forum/index.php
>
>
> ----- Original Message -----
> From: "Lawrence Rhodes"
> To: "Electric Vehicle Discussion List"
> Sent: Thursday, February 17, 2005 5:13 AM
> Subject: Re: MAX712 IC to control NiCad charging.
>
>
>> http://pdfserv.maxim-ic.com/en/ds/1666.pdf
>> This is what I got. I can only think they must use a shunt or some other
>> device to work with high voltages and more cells or possibly multiple
> units.
>> Wonder if it could be the brains for a PFC???? LR>..........
>> ----- Original Message -----
>> From: "Peter VanDerWal"
>> To:
>> Sent: Wednesday, February 16, 2005 4:22 PM
>> Subject: Re: MAX712 IC to control NiCad charging.
>>
>>
>> > Did you try googling MAX712?
>> > I did and one of the first responses shows a circuit diagram.
>> >
>> >> Does anyone know how to use this IC to control NiCad Charging? The
>> >> MAX712.
>> >> That would be for flooded NiCads.
>> >> Lawrence Rhodes
>> >> Bassoon/Contrabassoon
>> >> Reedmaker
>> >> Book 4/5 doubler
>> >> Electric Vehicle & Solar Power Advocate
>> >> [EMAIL PROTECTED]
>> >> 415-821-3519
>> >>
>> >>
>> >
>>
>
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Regards
Richard
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--- End Message ---
--- Begin Message ---
Brigham Young University has a silver EV-1
There are some EV-1s in upper state New York being driven by state
employees.
how is it that those people got those EV-1s ?
I don't remember the circumstances surrounding the EV-1s in NY, but I
can say that the one that BYU has was "donated" by GM to the school, but
only as a rolling chassis. The sucker was gutted. No battery pack. No
controller. Did they even leave the motor? I don't recall. I just
remember thinking "thanks GM for donating a shell with 4 wheels". Also,
I believe the UltraCaps they are running will only power them down the
first half of the drag strip or something. They have to limp/coast
across the finish line. That's what they said at EVS-20. Maybe they'll
improve their range this year...
The BYU EV-1 donation was purely symbolic and highly touted (even though
GM gutted it). I would expect that the EV-1s in NY would be part of a
special program, and that they are probably still slated for eventual
destruction or at least de-commisioning/stripping like the BYU unit.
-Ken Trough
Admin - V is for Voltage Magazine
http://visforvoltage.com
AIM - ktrough
FAX - 801-749-7807
message - 866-872-8901
--- End Message ---
--- Begin Message ---
So I talked to Alltrax and while issuing me an RA Cliff gave me a pretty
hard time about not having a diode across my main contactor. To be honest
it wasn't there because I just dropped this controller in when I pulled out
my Curtis Controller which doesn't show a need for a diode. Could this
really have contributed to the problem? I have no problem adding a diode, I
just couldn't get a satisfactory answer out of Cliff as to why in his mind
this was so crucial. He even mentioned that in the install instructions it
is recommended, which I pointed out was not quite as forceful and stating
that it is required. He just kept going on about how fields collapse and
cause huge votage spikes, which I don't disagree with, I just don't see how
a diode across the main contactor does anything to limit damage to my
controller from these spikes. I also don't understand why this seemingly
important protection is not built into the controller itself.
damon
--- damon henry <[EMAIL PROTECTED]> wrote:
> My Alltrax controller just blew up. It was quite a
> surprise. I had just
> headed out of my neighborhood on a beautiful 50
> degree day to test out my
> new battery arraingement, when I heard a fizzing
> noise and looked down to
> see sparks and smoke shooting out of the back of my
> controller. I cut the
> power and pulled off to the side of the road then
> pushed my motorcycle back
> home.
>
> I sent an e-mail to Alltrax to see what comes next.
> I can't see that it was
> anything I did and I just bought the controller last
> summer so hopefully it
> is a warranty repair type of deal. If not it may be
> time to start selling
> off components and move on to a different hobby.
>
> damon
>
>
=====
'92 Honda Civic sedan, 144V
____
__/__|__\ __
=D-------/ - - \
'O'-----'O'-'
Would you still drive your car if the tailpipe came out of the steering
wheel? Are you saving any gas for your kids?
__________________________________
Do you Yahoo!?
Yahoo! Mail - Find what you need with new enhanced search.
http://info.mail.yahoo.com/mail_250
--- End Message ---
--- Begin Message ---
IIRC. The EV-1's in New York all belong to GM. They are being used by GM
employee's as a test bed to evaluate the drivetrain for cold weather
performance/issues, since the Fuel Cell version will be based upon the
EV-1 drivetrain.
I would highly suspect that the cars being crushed do not have their
motors/controllers in them.
--
Stay Charged!
Hump
"Whether you think you can or think you can't, you are right!" --Henry Ford
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Ken Trough
> Sent: Thursday, February 17, 2005 3:22 PM
> To: ev@listproc.sjsu.edu
> Subject: RE: EV1 vigil in Burbank, Calif.
>
>>> Brigham Young University has a silver EV-1
>
>>> There are some EV-1s in upper state New York being driven by state
>>> employees.
>
>> how is it that those people got those EV-1s ?
>
> I don't remember the circumstances surrounding the EV-1s in NY, but I can
> say that the one that BYU has was "donated" by GM to the school, but only
> as
> a rolling chassis. The sucker was gutted. No battery pack. No controller.
> Did they even leave the motor? I don't recall. I just remember thinking
> "thanks GM for donating a shell with 4 wheels". Also, I believe the
> UltraCaps they are running will only power them down the first half of the
> drag strip or something. They have to limp/coast across the finish line.
> That's what they said at EVS-20. Maybe they'll improve their range this
> year...
>
> The BYU EV-1 donation was purely symbolic and highly touted (even though
> GM
> gutted it). I would expect that the EV-1s in NY would be part of a special
> program, and that they are probably still slated for eventual destruction
> or
> at least de-commisioning/stripping like the BYU unit.
>
> -Ken Trough
> Admin - V is for Voltage Magazine
> http://visforvoltage.com
> AIM - ktrough
> FAX - 801-749-7807
> message - 866-872-8901
>
--- End Message ---
--- Begin Message ---
Damon,
One of my Alltrax controllers did the same thing. It failed, wide open,
in a very dramatic fashion with a shower of sparks and smoke within a
couple days of me installing it in a 48V go-kart. Luckily, I had the
chain drive off at the time otherwise it would have taken off without me
down the driveway. My Dad had another one which he purchased within
days of mine and I installed it and haven't had a problem since.
Alltrax replaced the fried one at no cost to me but never mentioned
anything about a diode.
All in all I give their product and customer support a good grade but
every time I get on my go-kart or my new dirt-bike conversion that
dramatic incident flashed through my head... Realize the controller is
right between my legs (couple inches) on both these vehicles. Its not a
place where you want a shower of sparks pouring out...(unless you want
an "e-vasectomy"..;-) ) not to mention going on a hell of ride until you
can cut the power...
BTW - I searched the Net and found two websites with similar stories of
other people who had this happen to them though they were all attached
to Etek motors, including mine, which supposedly they have fixed in all
the new ones.
Regards,
---------------------------------------------------------------------
Jay Brown
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of damon henry
Sent: Thursday, February 17, 2005 2:41 PM
To: ev@listproc.sjsu.edu
Subject: Re: She's dead Jim
So I talked to Alltrax and while issuing me an RA Cliff gave me a pretty
hard time about not having a diode across my main contactor. To be
honest
it wasn't there because I just dropped this controller in when I pulled
out
my Curtis Controller which doesn't show a need for a diode. Could this
really have contributed to the problem? I have no problem adding a
diode, I
just couldn't get a satisfactory answer out of Cliff as to why in his
mind
this was so crucial. He even mentioned that in the install instructions
it
is recommended, which I pointed out was not quite as forceful and
stating
that it is required. He just kept going on about how fields collapse
and
cause huge votage spikes, which I don't disagree with, I just don't see
how
a diode across the main contactor does anything to limit damage to my
controller from these spikes. I also don't understand why this
seemingly
important protection is not built into the controller itself.
damon
>--- damon henry <[EMAIL PROTECTED]> wrote:
>
> > My Alltrax controller just blew up. It was quite a
> > surprise. I had just
> > headed out of my neighborhood on a beautiful 50
> > degree day to test out my
> > new battery arraingement, when I heard a fizzing
> > noise and looked down to
> > see sparks and smoke shooting out of the back of my
> > controller. I cut the
> > power and pulled off to the side of the road then
> > pushed my motorcycle back
> > home.
> >
> > I sent an e-mail to Alltrax to see what comes next.
> > I can't see that it was
> > anything I did and I just bought the controller last
> > summer so hopefully it
> > is a warranty repair type of deal. If not it may be
> > time to start selling
> > off components and move on to a different hobby.
> >
> > damon
> >
> >
>
>
>=====
>'92 Honda Civic sedan, 144V
> ____
> __/__|__\ __
> =D-------/ - - \
> 'O'-----'O'-'
>Would you still drive your car if the tailpipe came out of the steering
>wheel? Are you saving any gas for your kids?
>
>
>
>__________________________________
>Do you Yahoo!?
>Yahoo! Mail - Find what you need with new enhanced search.
>http://info.mail.yahoo.com/mail_250
>
--- End Message ---
--- Begin Message ---
The voltage spike from a contactor will vary
considerably with many factors, but in general I would
strongly recommend installing this diode (although
you are correct, protection such as a TVS is something
that should be in the
control. But this does not excuse the diode being
absent from
the contactor coil as well).
I guess as a general rule you should put diodes across
all inductive loads that are switched off. If it
doesn't damage the control there is a good chance it
can damage something else.
--- damon henry <[EMAIL PROTECTED]> wrote:
> So I talked to Alltrax and while issuing me an RA
> Cliff gave me a pretty
> hard time about not having a diode across my main
> contactor. To be honest
> it wasn't there because I just dropped this
> controller in when I pulled out
> my Curtis Controller which doesn't show a need for a
> diode. Could this
> really have contributed to the problem? I have no
> problem adding a diode, I
> just couldn't get a satisfactory answer out of Cliff
> as to why in his mind
> this was so crucial. He even mentioned that in the
> install instructions it
> is recommended, which I pointed out was not quite as
> forceful and stating
> that it is required. He just kept going on about
> how fields collapse and
> cause huge votage spikes, which I don't disagree
> with, I just don't see how
> a diode across the main contactor does anything to
> limit damage to my
> controller from these spikes. I also don't
> understand why this seemingly
> important protection is not built into the
> controller itself.
>
> damon
>
>
> >--- damon henry <[EMAIL PROTECTED]> wrote:
> >
> > > My Alltrax controller just blew up. It was
> quite a
> > > surprise. I had just
> > > headed out of my neighborhood on a beautiful 50
> > > degree day to test out my
> > > new battery arraingement, when I heard a fizzing
> > > noise and looked down to
> > > see sparks and smoke shooting out of the back of
> my
> > > controller. I cut the
> > > power and pulled off to the side of the road
> then
> > > pushed my motorcycle back
> > > home.
> > >
> > > I sent an e-mail to Alltrax to see what comes
> next.
> > > I can't see that it was
> > > anything I did and I just bought the controller
> last
> > > summer so hopefully it
> > > is a warranty repair type of deal. If not it
> may be
> > > time to start selling
> > > off components and move on to a different hobby.
> > >
> > > damon
> > >
> > >
> >
> >
> >=====
> >'92 Honda Civic sedan, 144V
> > ____
> > __/__|__\ __
> > =D-------/ - - \
> > 'O'-----'O'-'
> >Would you still drive your car if the tailpipe came
> out of the steering
> >wheel? Are you saving any gas for your kids?
> >
> >
> >
> >__________________________________
> >Do you Yahoo!?
> >Yahoo! Mail - Find what you need with new enhanced
> search.
> >http://info.mail.yahoo.com/mail_250
> >
>
>
--- End Message ---
--- Begin Message ---
damon henry [mailto:[EMAIL PROTECTED] wrote:
> Could this really have contributed to the problem?
Perhaps, since you could have been subjecting the controller to spikes
of a few times your pack voltage when the contactor opens. The spikes
would be on the KSI input, if you wire the controller according to their
suggestions.
But, the stress that you would have been subjecting the controller to
would have been ocurring each time that you turn *off* the main
contactor, so it seems most likely that a failure would have occurred
just as you turned on or off the bike, not while you were riding along.
It is possible that each time you turned the contactor off you subjected
the controller to some voltage stress which weakened some part(s) until
they just finally failed, even though they didn't fail immediately upon
turning the contactor on or off for the last time.
> He even mentioned that in the install instructions it
> is recommended, which I pointed out was not quite as forceful
> and stating that it is required.
I didn't even see a recommendation in the AllTrax AXE manual I
downloaded. In the paragraph where they state that a main contactor is
required but not supplied, it points out that the coil voltage must
equal pack voltage, but does not mention a freewheel diode at all. On
the wiring diagrams, diodes are shown across every coil, and one diagram
at least suggests that the diodes are 1N4004 (1A 200V), however, the
average person might not even realise that the diodes are something he
must supply separately from the contactors (i.e. some contactors come
with diodes, but others don't).
> He just kept going on about how fields collapse and
> cause huge votage spikes, which I don't disagree with, I just
> don't see how a diode across the main contactor does anything
> to limit damage to my controller from these spikes.
The voltage spike is caused when the power to the coil is removed. The
coil's inductance does not allow the current to change abruptly, and so
the voltage is forced to spike up as the inductance tries to keep the
current flowing (by causing the switch contacts to arc, etc.)
Installing a freewheel diode across the coil prevents the voltage spike
by providing a path for the current to flow at the instant that coil
power is removed. The voltage across the coil is now clamped to the
diode's forward drop (typically <1V).
Hope this helps,
Roger.
--- End Message ---
