EV Digest 6387
Topics covered in this issue include:
1) Solectria BRLS-240H Control Schematic
by "Dale Ulan" <[EMAIL PROTECTED]>
2) Re: Series Hybrids eff, Re: EV digest 6372
by "Peter VanDerWal" <[EMAIL PROTECTED]>
3) Re: When a controller fails... question
by "Peter VanDerWal" <[EMAIL PROTECTED]>
4) Re: Disconnects
by [EMAIL PROTECTED]
5) RE: Disconnects
by "Roger Stockton" <[EMAIL PROTECTED]>
6) Re: 3-wheeler driving experiences
by "Tom Shay" <[EMAIL PROTECTED]>
7) Re: would charging single cells like this be ok to keep cells in balance?
by "Peter Gabrielsson" <[EMAIL PROTECTED]>
8) Toyota 1967 2000 GT
by "Lawrence Rhodes" <[EMAIL PROTECTED]>
9) Re: would charging single cells like this be ok to keep cells in balance?
by <[EMAIL PROTECTED]>
10) Car of the future one of our own. List your's too.
by "Lawrence Rhodes" <[EMAIL PROTECTED]>
11) Re: would charging single cells like this be ok to keep cells in balance?
by "Roland Wiench" <[EMAIL PROTECTED]>
12) Re: Disconnects
by Lee Hart <[EMAIL PROTECTED]>
13) Re: would charging single cells like this be ok to keep cells in
balance?
by Lee Hart <[EMAIL PROTECTED]>
14) Electraking and golf cart for sale.
by "Lawrence Rhodes" <[EMAIL PROTECTED]>
15) Re: would charging single cells like this be ok to keep cells in balance?
by "Joe Smalley" <[EMAIL PROTECTED]>
16) Re: Electraking and golf cart for sale.
by "Bob Rice" <[EMAIL PROTECTED]>
17) Looking for small transaxle source
by "Peter VanDerWal" <[EMAIL PROTECTED]>
18) Re: Looking for small transaxle source
by Jack Murray <[EMAIL PROTECTED]>
19) [Fwd: Tell your friends to join us: Speak out on Global Warming!]
Forwarded without recommentation.
by JS <[EMAIL PROTECTED]>
20) Re: Toyota 1967 2000 GT
by Tony Hwang <[EMAIL PROTECTED]>
21) RE: [Fwd: Tell your friends to join us: Speak out on Global Warming!]
Forwarded without recommentation.
by [EMAIL PROTECTED]
22) NiCD battery sag vs. temps
by Chris Zach <[EMAIL PROTECTED]>
23) Re: When a controller fails... question
by "Darin - at - metrompg.com" <[EMAIL PROTECTED]>
24) Capacitors and batteries in parallel
by [EMAIL PROTECTED]
25) Older 6000lb Clark Fork Lift for free on Craigslist (watsonville)
by Cor van de Water <[EMAIL PROTECTED]>
26) Re: [EV] Re: When a controller fails... question
by Eduardo Kaftanski <[EMAIL PROTECTED]>
27) Re: Older 6000lb Clark Fork Lift for free on Craigslist (watsonville)
by "Mike Harvey" <[EMAIL PROTECTED]>
28) Re: [Fwd: Tell your friends to join us: Speak out on Global Warming!]
Forwarded without recommentation.
by "Mike Harvey" <[EMAIL PROTECTED]>
29) Re: Disconnects
by "Rich Rudman" <[EMAIL PROTECTED]>
--- Begin Message ---
I had to repair a couple of these. There's hardly any information available,
and above all, no schematics. I traced it out and made a PDF file of it. I
needed to do an alignment and some switching speed adjustments after
replacing all of the power devices. If anyone needs them, email me and I can
email it to you.
-Dale
--- End Message ---
--- Begin Message ---
Actually, you'd be lucky to get 12V from a 12V battery when discharged at
the 75 amps rate. And if it's at 20% DoD, it's closer to 10.5V. Then
again 14.4V is finish charge voltage.
For charge efficiency I normally figure an average of 11V on discharge and
13.8V on charge with 100% coulometric. That gets us around 80%.
Reality is less, but I like to be optimistic or someone who doesn't bother
to do math comes up with numbers like 95-99%.
> I think you must be looking at the coulombmetric efficiency- amp-hrs in
> vs amp-hrs out.
>
> The actual energy efficiency also depends on voltage. If you charge a
> 12V battery at 14.4V for 5 amp-hrs then drain the 5 amp-hrs at a 75 amp
> rate, it may return those 5 amp-hrs at 12.6V. That's 87.5% efficient.
> Note that charging at higher rates requires slightly higher voltages and
> draining at higher rates returns at a lower voltage. At the high amps
> used to accelerate a car, typically that voltage sag will be
> significant. The charge rate will not be as intense since it only needs
> to make up the average current consumed, but it's still going to be
> somewhat on the high side.
>
> Danny
>
> jerryd wrote:
>
>> Just not true Peter. Lead batts being used in the
>>20-80% charged range as they must for this to work well are
>>very eff, in the 95-99% range in fast charging, per
>>AC Propulsion, Hackleman.
>> They even cool during this which probably means they
>>are turning some heat into charge!! It's only after they get
>>above about 80% charged does their eff drop but still no
>>where like what you say, still in the 90% range with a good
>>finish charge profile. One wouldn't go into the 80% above
>>charged range until home, charged from the grid for the
>>highest eff. But then you couldn't claim series hybrids are
>>less eff so you conviently leave that out.
>>
>>
>>
>
>
--
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--- Begin Message ---
> Don't most of us use contactors connected to the ignition switch? Doesn't
> turning the key shut off the contactor at a point before the juice hits
> the
> controller?
It /should/ be, but apparently some people either don't think of this or
don't want to spend the money on safety and do without the main contactor.
--
If you send email to me, or the EVDL, that has > 4 lines of legalistic
junk at the end; then you are specifically authorizing me to do whatever I
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legalistic signature is void.
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--- Begin Message ---
In one our earliest renditions of OJ we had a contactor weld shut
during a run. We were running an ON/OFF - Series/Parallel contactor
control setup. The driver pulled the red OS lever thereby opening the
big dual knife switch that we had built. The peak battery current on
that run was 3000 + amps. The disconnect worked perfectly and saved him
a trip through the cornfield at the end of the track where he probably
would have been going 150 +. On the flip side, my undersized breaker
type disconnect blew apart on the MG car probably costing us a 100+ run
and a win over the hemi car on TV. If your going to put in a disconnect
make sure it can handle the load. Don't learn the hard way like I did.
Keep it simple!
Shawn
-----Original Message-----
From: [EMAIL PROTECTED]
To: [email protected]
Sent: Mon, 5 Feb 2007 1:33 PM
Subject: Re: Disconnects
All good ideas, just keep in mind that you can't relay on the disconnect
handle to shut down a Big short or a controller run a way. the contacts
are
too close and will flash over at anything above about 96 volts.
But for a safety disconnect or service shut down EXelent!
Madman
----- Original Message -----
From: "Bill Dube" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, February 04, 2007 7:31 PM
Subject: Re: Disconnects
Installing a big Anderson connector between the pack and the rest of
the vehicle is a terrific idea. I highly recommend it. If you install
one of those lever style handles to make it easy to take apart and
re-connect, that is even better. If you put some sort of cable or
linkage that allows you to disconnect the pack from the driver's
seat, that is even better yet.
When you are working on the car, it is really helpful to be able to
easily "pull the plug" on the traction pack so all the rest of the
wiring is guaranteed to be dead.
Bill Dube'
At 06:46 PM 2/4/2007, you wrote:
>In 85679, Matt Kensington asked about disconnects. The pictures from
>the BBB show a number of instances of the Anderson plugs being
>used,. See http://ntensedsign.com/bbb/pages/PICT0014_JPG.htm for an
>example. Judging by the number of occurrences, someone must be
>marketing a mount and handle for the Andersons.
________________________________________________________________________
Check out the new AOL. Most comprehensive set of free safety and
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--- End Message ---
--- Begin Message ---
Rich Rudman wrote:
> All good ideas, just keep in mind that you can't relay on the
> disconnect handle to shut down a Big short or a controller run
> a way. the contacts are too close and will flash over at
> anything above about 96 volts.
Are you sure about this, Rich? (can we see pictures of the carnage? ;^)
The SB's are rated for 600V, and I've yanked them at 240V. While the
contacts definitely do arc as they separate, I never saw any arcing
across from one pole to the other.
If this is a concern, simply upgrading from an SB housing to an SBE or
SBO ought to solve the problem (by affording another 0.5-0.75" between
the poles on each connector half).
(Note that SBs/Andersons are not rated/recommended for *interrupting*
even their rated carry current, never mind a multi-kiloamp fault; do it
once and replace the contacts. I think the Anderson rat-trap handle
arrangement helps as it provides leverage that makes it possible to
separate the halves of the connector far more rapidly than if one pulled
on the connector halves directly, but I am not sure that the handle is
able to get enough separation between the two halves in its full open
position to ensure that a high voltage arc will extinquish.)
Roger.
--- End Message ---
--- Begin Message ---
----- Original Message -----
From: "Tom Gocze" <[EMAIL PROTECTED]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Monday, February 05, 2007 1:01 PM
Subject: RE: 3-wheeler driving experiences
Hi Osmo,
I had two Gizmos which were a lot of fun to drive. One had moped type
tires and the other one was newer with real tires.
Both ran good and were very nimble. The big issue was that you had to
move the whole vehicle out of the way of a bump, since the spacing center
to center was about 20" between the three wheels. It could shake the
daylights out of you if you hit it at 45 mph.
Getting through chuckholes is one of the interesting things I remember about
driving a Cushman 3-wheeler which had one front wheel and two rear wheels.
Holes couldn't be straddled unless they were very small. Steering to make
all
three wheels miss a chuckhole would often put the scooter in the path of
another vehicle. I would try to pick a smooth path for the front wheel and
let
the rear wheels bounce through the holes.
--- End Message ---
--- Begin Message ---
There's no reason that I can see why it wouldn't work for charging.
Wether or not it's cheaper depends on how many cells you have in your
pack?
You'll also need a cell monitoring solution to prevent over discharge
of the weakest cell in the pack. The step from there to a full
featured BMS is not that great.
On 2/5/07, Tony Hwang <[EMAIL PROTECTED]> wrote:
Hi all,
Say you have a 2S1P pack:
- | | + - | | +
You can charge them by wiring a single cell charger to each cell without having
to take apart the pack.
If you have a say, 2S2P pack, where the cells are connected like this:
a---(cell 1)++++c-----(cell 2)++++b
a---(cell 1)++++c-----(cell 2)++++b
where a and b are connected together, but not c, can you still charge each cell
seperately with a single cell charger simultaneously? (say, using four chargers
that are not grounded).
I'm asking because this seems like a cheap and simple, brute force way to
balance charge the pack. Thanks!
- Tony
--
www.electric-lemon.com
--- End Message ---
--- Begin Message ---
http://www.japanesenostalgiccar.com/article.cgi?section=profiles&article=toyota2000gt&atitle=1967%20Toyota%202000GT
With Jaguar like styling I'm suprised it didn't take off. I couldn't find
the specs but I'm sure there aren't many around to convert. The early 240 z
would be a better candidate. The main page has many older Japanese cars.
Good place for ideas for conversions. Lawrence Rhodes...
--- End Message ---
--- Begin Message ---
lots of chargers ,,, and you would need to know when one wasn't working ....
but maybe rewiring a trasformer with 100 4.2 v windings .... and then a bunch
of rectrofiers and some kind of regulators ,,, yep lots of work .,,,,, another
question ,,, if you are charging cells instead of the whole pack can you just
charge a cell to 4.2v and then leave it sit at 4.2 v all night ,,, or would
each of these chargers need a timer also ...
>
> From: Tony Hwang <[EMAIL PROTECTED]>
> Date: 2007/02/05 Mon PM 06:50:58 EST
> To: [email protected]
> Subject: would charging single cells like this be ok to keep cells in balance?
>
> Hi all,
>
> Say you have a 2S1P pack:
>
> - | | + - | | +
>
> You can charge them by wiring a single cell charger to each cell without
> having to take apart the pack.
>
> If you have a say, 2S2P pack, where the cells are connected like this:
>
> a---(cell 1)++++c-----(cell 2)++++b
>
> a---(cell 1)++++c-----(cell 2)++++b
>
> where a and b are connected together, but not c, can you still charge each
> cell seperately with a single cell charger simultaneously? (say, using four
> chargers that are not grounded).
>
> I'm asking because this seems like a cheap and simple, brute force way to
> balance charge the pack. Thanks!
>
> - Tony
>
--- End Message ---
--- Begin Message ---
http://www.pbs.org/wgbh/nova/car/my-berube.html Nova is asking for your car
of the future. Send in your url with your car of the future. Lawrence
Rhodes........
--- End Message ---
--- Begin Message ---
At one time, we install the electrical system in a battery shop, that the
Air Force provided the charger for charging 36 each 2 volt cells with a 37
lead 72 volt battery charger, for there ni-cad aircraft batteries.
Back at that time, the battery charger cost about $100.00 which there depot
supply made a mistake on the cost. It was price from the military depot for
$1,000.000.00 and was change to $10,000.00 and finally to $100.00 each. The
battery charger sat in a separate room next to the battery room where we
connected the 37 leads to a wireway buss system in the battery shop. It had
a remote indicator panel, so the operator can see the status of each cell.
The battery charger could also work by itself without the remote. As I
remember this was back in the 80's and was the normal charging system back
then in all Air Force Ni-Cad battery rooms. It was updated and these units
may be in a lot of Air Force savage yards.
The battery charger panel had a voltage and ampere indicator and a 0 to 36
position selector which is used to switch that one 2 volt cell to the
indicator meters while all 36 cells were charging.
Roland
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, February 06, 2007 6:45 AM
Subject: Re: would charging single cells like this be ok to keep cells in
balance?
> lots of chargers ,,, and you would need to know when one wasn't working
> .... but maybe rewiring a trasformer with 100 4.2 v windings .... and then
> a bunch of rectrofiers and some kind of regulators ,,, yep lots of work
> .,,,,, another question ,,, if you are charging cells instead of the whole
> pack can you just charge a cell to 4.2v and then leave it sit at 4.2 v all
> night ,,, or would each of these chargers need a timer also ...
> >
> > From: Tony Hwang <[EMAIL PROTECTED]>
> > Date: 2007/02/05 Mon PM 06:50:58 EST
> > To: [email protected]
> > Subject: would charging single cells like this be ok to keep cells in
> > balance?
> >
> > Hi all,
> >
> > Say you have a 2S1P pack:
> >
> > - | | + - | | +
> >
> > You can charge them by wiring a single cell charger to each cell without
> > having to take apart the pack.
> >
> > If you have a say, 2S2P pack, where the cells are connected like this:
> >
> > a---(cell 1)++++c-----(cell 2)++++b
> >
> > a---(cell 1)++++c-----(cell 2)++++b
> >
> > where a and b are connected together, but not c, can you still charge
> > each cell seperately with a single cell charger simultaneously? (say,
> > using four chargers that are not grounded).
> >
> > I'm asking because this seems like a cheap and simple, brute force way
> > to balance charge the pack. Thanks!
> >
> > - Tony
> >
>
>
--- End Message ---
--- Begin Message ---
Rich Rudman wrote:
All good ideas, just keep in mind that you can't relay on the disconnect
handle to shut down a Big short or a controller run a way. the contacts are
too close and will flash over at anything above about 96 volts.
But for a safety disconnect or service shut down EXelent!
I'm not quite sure what you mean, Rich. Do you mean an Anderson with a
handle? If so, the contact spacing when you pull them apart is over 1/2"
each, or 1" for the two contacts, even before the halves unmate. That
will break a lot more than 96vdc.
Or, did you mean they aren't built to break high *current*? Here I
agree. They will arc a lot if the contacts are slowly pulled apart,
which causes a lot of contact damage. They could even weld if you pull
them apart slowly.
--
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
--- End Message ---
--- Begin Message ---
Tony Hwang wrote:
If you have a 2S2P pack, where the cells are connected like this:
a---(cell 1)++++c-----(cell 2)++++b
a---(cell 1)++++c-----(cell 2)++++b
where a and b are connected together, but not c, can you still
charge each cell seperately with a single cell charger simultaneously?
(say, using four chargers that are not grounded).
Do you mean that a-a are connected, b-b are connected, but c-c are not
connected?
If so; yes, you can charge them with four individual chargers with
isolated outputs. The strings will interact, however. Let me re-number
your illustration:
a---(cell 1)++++c-----(cell 2)++++b
| |
a---(cell 3)++++c-----(cell 4)++++b
If you charge just (say) cell 1, this raises its voltage. You will also
be DIS-charging cell 2, and charging cells 3 and 4 in series. With those
connections between a-a and b-b, they interact. So, you will have
trouble if one of your four chargers fails or is set to a different
voltage than the rest.
I'm asking because this seems like a cheap and simple, brute force
way to balance charge the pack. Thanks!
It works if all the chargers are the same and working. The problems come
when one of them malfunctions. What kind of charger would you use that
is simple, cheap *and* reliable?
--
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
--- End Message ---
--- Begin Message ---
http://sfbay.craigslist.org/eby/car/271559880.html
--- End Message ---
--- Begin Message ---
Yes, that works.
It takes a long time to do the entire pack, but it works.
Joe Smalley
Rural Kitsap County WA
Fiesta 48 volts
NEDRA 48 volt street conversion record holder
[EMAIL PROTECTED]
----- Original Message -----
From: "Tony Hwang" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, February 05, 2007 3:50 PM
Subject: would charging single cells like this be ok to keep cells in
balance?
> Hi all,
>
> Say you have a 2S1P pack:
>
> - | | + - | | +
>
> You can charge them by wiring a single cell charger to each cell without
having to take apart the pack.
>
> If you have a say, 2S2P pack, where the cells are connected like this:
>
> a---(cell 1)++++c-----(cell 2)++++b
>
> a---(cell 1)++++c-----(cell 2)++++b
>
> where a and b are connected together, but not c, can you still charge each
cell seperately with a single cell charger simultaneously? (say, using four
chargers that are not grounded).
>
> I'm asking because this seems like a cheap and simple, brute force way to
balance charge the pack. Thanks!
>
> - Tony
>
--- End Message ---
--- Begin Message ---
----- Original Message -----
From: "Lawrence Rhodes" <[EMAIL PROTECTED]>
To: "Electric Vehicle Discussion List" <[email protected]>; "SFEVA"
<[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>;
<[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, February 06, 2007 12:56 PM
Subject: Electraking and golf cart for sale.
> http://sfbay.craigslist.org/eby/car/271559880.html
>
> Hi EVerybody;
Those Electra Kings are sorta cute<g>! I remember when they first came
out. Hope somebody gives it a oving home as it, like a Citicar, is an
inportant part of EV history. Now if it were on Craig's List in New Haven?
Sigh!
Seeya
Bob
>
> --
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.411 / Virus Database: 268.17.28/672 - Release Date: 2/6/07
>
>
--- End Message ---
--- Begin Message ---
Does anyone know of an affordable source for small transaxles, like the
ones used in Lawn/Garden tractors?
Doesn't mater if they are new or used as long as they are in good
condition and all have the same or substantially similar mounting points.
Thanks, Pete.
--
If you send email to me, or the EVDL, that has > 4 lines of legalistic
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--- Begin Message ---
http://www.surpluscenter.com/item.asp?UID=2007020614091495&item=13-1097
they have a few different ones.
Peter VanDerWal wrote:
Does anyone know of an affordable source for small transaxles, like the
ones used in Lawn/Garden tractors?
Doesn't mater if they are new or used as long as they are in good
condition and all have the same or substantially similar mounting points.
Thanks, Pete.
--- End Message ---
--- Begin Message ---
-------- Original Message --------
Subject: Tell your friends to join us: Speak out on Global Warming!
Date: Tue, 06 Feb 2007 18:26:35 GMT
From: Barbara Boxer <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: John Spradley <[EMAIL PROTECTED]>
<http://www.pacforachange.com>
Dear John,
<http://ga4.org/pacforachange/join-forward.html?domain=boxer2004&r=F1A8nWs1rHHl&;>
*Invite your friends & family to rank their preferred global warming
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Since last week, more than 20,000 Americans -- including you -- have
already shared your priorities with me about how we should fight global
warming. I'm thrilled by this tremendous response! Clearly, global
warming is an issue of critical importance to Americans from
coast-to-coast. Thank you so much for your feedback.
But I still hope to hear from tens of thousands more Americans. *Won't
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*Help me set the Senate's environmental agenda -- invite your friends &
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received when blogging about the hearing on DailyKos, spawning a rousing
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Clearly, online and offline, from the halls of Congress to the keyboards
of Americans all across our country, a growing bipartisan consensus is
emerging to confront this environmental crisis head-on. *The question
is -- how best can we fight global warming? Invite everyone you know to
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I've scheduled our next Environment and Public Works Committee hearing
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Thanks to the responses from you and more than 20,000 Americans, we've
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In Friendship,
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P.S. Please *invite your friends, family, neighbors, and colleagues to
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--- End Message ---
--- Begin Message ---
That car is one of the most aerodynamic ones according to this list, very low
cda:
http://en.wikipedia.org/wiki/Drag_coefficient
Also very expensive, and a collector's car. You DO NOT want to be converting it
into an EV, at least I wouldn't! :)
- Tony
Lawrence Rhodes <[EMAIL PROTECTED]> wrote:
http://www.japanesenostalgiccar.com/article.cgi?section=profiles&article=toyota2000gt&atitle=1967%20Toyota%202000GT
With Jaguar like styling I'm suprised it didn't take off. I couldn't find
the specs but I'm sure there aren't many around to convert. The early 240 z
would be a better candidate. The main page has many older Japanese cars.
Good place for ideas for conversions. Lawrence Rhodes...
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--- Begin Message ---
Right, and Barbara Boxer is going to so something about global
warming????????
I think this group is doing more than the government will do for years
to come.
Newt pointed out that the govt simply will ignore the people for at
least 5-10 years after 80 percent of the citizens are clamoring for something.
Doug
Last Tuesday, my first major act as the new Chair of the Senate's
Environment and Public Works Committee was to hold a hearing on global
warming. More than one-third of my colleagues participated -- an
unprecedented number -- each Senator offering his or her own ideas and
perspectives about how we should deal with the global warming crisis.
Then, after the hearing, I was further energized by the feedback I
received when blogging about the hearing on DailyKos, spawning a rousing
discussion that drew more than 800 comments to my initial blog
post.
Clearly, online and offline, from the halls of Congress to the keyboards
of Americans all across our country, a growing bipartisan consensus is
emerging to confront this environmental crisis head-on. *The
question
is -- how best can we fight global warming? Invite everyone you
know to
let us know what you think we should do to address the most pressing
environmental issue of our generation.*
I've scheduled our next Environment and Public Works Committee hearing
for Wednesday, and I want to share as much feedback with my colleagues
as possible when we reconvene.
Thank you so much for your attention to this critical issue.
In Friendship,
Barbara Boxer
--- End Message ---
--- Begin Message ---
I just got back from a 4kw run on the truck. Should have been about
50-60% range normally but at the end I was pulling a max of 50 amps at
1.0 vpc (252 cell BB600 pack, 30ah capacity, 300v nominal, 250v low
voltage limit on the controller). Really close to the wire to be honest.
Battery pack temp was about outside temp at the start which is zero
degrees F. Cold. However I thought NiCDs could handle the cold better
than flooded. Well, AGMs at least. Anyone else have any experience with
their NiCD packs at zero degree temps? How does range and power capacity
hold up over time?
Now that I think about it I noticed it sagging down into the 280's at
150a at the start of the drive. Which was a bit odd. Or maybe a 30ah
pack is a bit too small for a truck that wants to pull up to 200a peaks
and 70-100a cruise.
Chris
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--- Begin Message ---
Paul G. wrote:
Oh, one last thought about controller wiring. Have you considered a
method to precharge the controller? This in not included as a part of
Curtis controllers but should be used to reduce the chance of failure
I had been following the discussion about using a lightbulb sized for
the job. So it's in the plan too, yes.
(Of course, the first time I connected the controller to play with it, I
didn't know about precharge, and I thought I blew it up from the size of
the arc!)
Darin
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Yes it's this silly question again !
I know that by putting capacitors in series the capacitance is reduced by
1/(# of caps) but what if the capacitors are connected directly across each 12V
battery, rather than a series chain.
My first reaction is to think that the capacitor won't discharge by much as
seems that it will end up feeding current back to the battery.
So what if the first capacitor is connected to the first battery at the
negative terminal, and then each succesive series connected capacitor is
connected to each battery in parellel with it via a diode, with the cathode on
the
positive terminal of each battery and the anode to the next series connection
in the capcitor chain.
I suppose what I'm asking is can this system independently charge capacitors
to 12V, yet when they become discharged in series is the full capacitance
then not realised ?
I have just charged two photoflash capacitors, 330V 120uF each , seperately
and then connected them in series. I can measure twice the voltage, but are
they also now charged with 120uF, making a 660V 120uF capacitor ?
Chris
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--- Begin Message ---
Found free Clark 6000lbs forklift on Craigslist:
(San Francisco Bay area)
Cor.
http://sfbay.craigslist.org/sby/zip/274423364.html
Older 6000lb Clark Fork Lift (watsonville)
-------------------------------------------------------------------------
Reply to: [EMAIL PROTECTED]
Date: 2007-02-06, 12:25PM PST
I have an Older Clark Fork Lift, Needs engine repair.
If you need one, come pick it up.
Located in Salinas.
--- End Message ---
--- Begin Message ---
>
> That sounds like a good system. As an alternative, you could drop the main
> contactor eveytime you hit the brakes - that would be simpler and
> therefore, a bit more reliable.
>
I have read that holding the car with the motor on hills is bad. Starting
on a hill with the left foot on the brake and right on the gas is doable, right?
--
Eduardo K. |
http://www.carfun.cl | I'm white and nerdy
http://e.nn.cl | Weird Al
http://ev.nn.cl |
--- End Message ---
--- Begin Message ---
You SFers have all the fun.
----- Original Message -----
From: "Cor van de Water" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, February 06, 2007 4:57 PM
Subject: Older 6000lb Clark Fork Lift for free on Craigslist (watsonville)
Found free Clark 6000lbs forklift on Craigslist:
(San Francisco Bay area)
Cor.
http://sfbay.craigslist.org/sby/zip/274423364.html
Older 6000lb Clark Fork Lift (watsonville)
-------------------------------------------------------------------------
Reply to: [EMAIL PROTECTED]
Date: 2007-02-06, 12:25PM PST
I have an Older Clark Fork Lift, Needs engine repair.
If you need one, come pick it up.
Located in Salinas.
--- End Message ---
--- Begin Message ---
I don't see anything wrong with voicing your position on the matter. Probably
won't amount to a hill of beans. But.... I do mind the partisan response email
I received "assuming" I was a left-winger taking up the fight against the evil
right.
For those of you that haven't received this beaut, their response was...
"Thank you for signing up to join PAC for a Change -- the organization founded
by Barbara Boxer to keep us together as we fight the Republican right-wing."
Man that toasted my buns...So I had to respond...
"I just had to write back in the response the "fight the Republican right-wing"
comment in your email. I'm not so interested in the party politics as I am
fighting GLC and this country's dependence on foreign oil.
I have a radical idea. How about the left, right, and everyone in the middle
take partisan politics out of the real issues that affect the world and this
country's national security. Man that would be refreshing.
If you want to differentiate yourselves and drive real change, show us you care
more about the issues than you do your party line."
Falling on deaf ears Im sure. But hey, they asked for it.
Regards, Mike
----- Original Message -----
From: [EMAIL PROTECTED]
To: [email protected]
Sent: Tuesday, February 06, 2007 3:54 PM
Subject: RE: [Fwd: Tell your friends to join us: Speak out on Global
Warming!] Forwarded without recommentation.
Right, and Barbara Boxer is going to so something about global warming????????
I think this group is doing more than the government will do for years to
come.
Newt pointed out that the govt simply will ignore the people for at least
5-10 years after 80 percent of the citizens are clamoring for something.
Doug
Last Tuesday, my first major act as the new Chair of the Senate's
Environment and Public Works Committee was to hold a hearing on global
warming. More than one-third of my colleagues participated -- an
unprecedented number -- each Senator offering his or her own ideas and
perspectives about how we should deal with the global warming crisis.
Then, after the hearing, I was further energized by the feedback I
received when blogging about the hearing on DailyKos, spawning a rousing
discussion that drew more than 800 comments to my initial blog post.
Clearly, online and offline, from the halls of Congress to the keyboards
of Americans all across our country, a growing bipartisan consensus is
emerging to confront this environmental crisis head-on. *The question
is -- how best can we fight global warming? Invite everyone you know to
let us know what you think we should do to address the most pressing
environmental issue of our generation.*
I've scheduled our next Environment and Public Works Committee hearing
for Wednesday, and I want to share as much feedback with my colleagues
as possible when we reconvene.
Thank you so much for your attention to this critical issue.
In Friendship,
Barbara Boxer
--- End Message ---
--- Begin Message ---
We can still hear each other Bitching about not having enough breaker on MG.
Man I woulda Killed for a pair of 600 amp Heinmans.
It's still amazing that we cleared 3000 amps of Breaker... NOT
opened..cleared, like blown the swingers right off.
We needed about another day, The one day they stole from us, to get enough
copper in the right places to really matter.
Madman
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, February 06, 2007 7:59 AM
Subject: Re: Disconnects
> In one our earliest renditions of OJ we had a contactor weld shut
> during a run. We were running an ON/OFF - Series/Parallel contactor
> control setup. The driver pulled the red OS lever thereby opening the
> big dual knife switch that we had built. The peak battery current on
> that run was 3000 + amps. The disconnect worked perfectly and saved him
> a trip through the cornfield at the end of the track where he probably
> would have been going 150 +. On the flip side, my undersized breaker
> type disconnect blew apart on the MG car probably costing us a 100+ run
> and a win over the hemi car on TV. If your going to put in a disconnect
> make sure it can handle the load. Don't learn the hard way like I did.
> Keep it simple!
>
> Shawn
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> To: [email protected]
> Sent: Mon, 5 Feb 2007 1:33 PM
> Subject: Re: Disconnects
>
> All good ideas, just keep in mind that you can't relay on the disconnect
> handle to shut down a Big short or a controller run a way. the contacts
> are
> too close and will flash over at anything above about 96 volts.
>
> But for a safety disconnect or service shut down EXelent!
>
> Madman
>
>
> ----- Original Message -----
> From: "Bill Dube" <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Sunday, February 04, 2007 7:31 PM
> Subject: Re: Disconnects
>
>
> > Installing a big Anderson connector between the pack and the rest of
> > the vehicle is a terrific idea. I highly recommend it. If you install
> > one of those lever style handles to make it easy to take apart and
> > re-connect, that is even better. If you put some sort of cable or
> > linkage that allows you to disconnect the pack from the driver's
> > seat, that is even better yet.
> >
> > When you are working on the car, it is really helpful to be able to
> > easily "pull the plug" on the traction pack so all the rest of the
> > wiring is guaranteed to be dead.
> >
> > Bill Dube'
> >
> > At 06:46 PM 2/4/2007, you wrote:
> > >In 85679, Matt Kensington asked about disconnects. The pictures from
> > >the BBB show a number of instances of the Anderson plugs being
> > >used,. See http://ntensedsign.com/bbb/pages/PICT0014_JPG.htm for an
> > >example. Judging by the number of occurrences, someone must be
> > >marketing a mount and handle for the Andersons.
> >
>
>
> ________________________________________________________________________
> Check out the new AOL. Most comprehensive set of free safety and
> security tools, free access to millions of high-quality videos from
> across the web, free AOL Mail and more.
>
--- End Message ---
