EV Digest 5827
Topics covered in this issue include:
1) Re: NmG dealership in Texas!
by "Death to All Spammers" <[EMAIL PROTECTED]>
2) Newbie Questions
by [EMAIL PROTECTED]
3) Re: High-powered Mini
by Bruce Weisenberger <[EMAIL PROTECTED]>
4) Re: Car weights and tire pressure
by Jeff Shanab <[EMAIL PROTECTED]>
5) Re: Newbie Questions
by Paul Wujek <[EMAIL PROTECTED]>
6) Re: Newbie Questions
by [EMAIL PROTECTED]
7) Re: Motor Lables? was Re: 5000 rpms safe for a 9" ADC?
by "Roland Wiench" <[EMAIL PROTECTED]>
8) Re: NmG dealership in Texas!
by "steve clunn" <[EMAIL PROTECTED]>
9) Re: Another range question
by "steve clunn" <[EMAIL PROTECTED]>
10) Re: NmG dealership in Texas!
by Owen Emry <[EMAIL PROTECTED]>
11) 2 8"s vs 2 9"s
by "steve clunn" <[EMAIL PROTECTED]>
12) Re: Understanding EV design relationships
by Lee Hart <[EMAIL PROTECTED]>
13) Re: NmG dealership in Texas! An ' Stuff
by "Bob Rice" <[EMAIL PROTECTED]>
14) Re: Ultra Capacitors, Aluminum Batteries
by Aaron Richardson <[EMAIL PROTECTED]>
15) Re: Still batteries
by "Phil Marino" <[EMAIL PROTECTED]>
16) EAA Chapter Meeting
by <[EMAIL PROTECTED]>
17) Capacitor question
by "Mark McCurdy" <[EMAIL PROTECTED]>
18) Re: NmG dealership in Texas!
by "David Roden" <[EMAIL PROTECTED]>
19) Re: Newbie Questions
by "David Roden" <[EMAIL PROTECTED]>
20) Re: Capacitor question
by Doug Weathers <[EMAIL PROTECTED]>
21) OT: I'm now in Houston (was: NmG dealership in Texas! An '
Stuff)
by Bill Dube <[EMAIL PROTECTED]>
22) Re: NmG dealership in Texas!
by Doug Weathers <[EMAIL PROTECTED]>
23) Re: NmG dealership in Texas!
by "Mark McCurdy" <[EMAIL PROTECTED]>
24) Ebay Curtis PMC 1231C-8601 Motor Controller 144V 500A
by "Ted C." <[EMAIL PROTECTED]>
25) Re: NmG dealership in Texas!
by "David Roden" <[EMAIL PROTECTED]>
26) Re: Capacitor question
by "Mark McCurdy" <[EMAIL PROTECTED]>
27) Re: NmG dealership in Texas!
by "Tom Shay" <[EMAIL PROTECTED]>
28) Fun with Batteries and Testers
by Mike Chancey <[EMAIL PROTECTED]>
29) Re: EM Radiation health hazard
by [EMAIL PROTECTED]
30) RE: dls-220-55 max voltage
by "Roger Stockton" <[EMAIL PROTECTED]>
31) RE: Capacitor question
by "Roger Stockton" <[EMAIL PROTECTED]>
--- Begin Message ---
> Thanks for the support!!
>
> I must admit I am surprised at the volume of negative responses. I
do have
> some advice for those who are inhibited with negative opinions so
easily: Go
> rent (or better yet buy) the DVD, "The Worlds Fastest Indian."
Watch it, pay
> attention and take notes.
>
> Ken
Haven't seen the movie, but when Anthony Hopkins was interviewed about
it, he discussed how the many years' obsession ruin the guy's marriage
and alienated his kids! It helps to have family interested in EVs, but
it's usually best to not use monitary arguments to convince anyone of
your choice, no matter how environmentally sound it may be.
--- End Message ---
--- Begin Message ---
I am new to this list and have a couple of questions.
1) I get many individual emails from this list. Is there a way to get one
dail log or something else?
2) Can anyone recommend a site where I can learn about how EV controllers
work and perhaps even see plans or a schematic?
Looking into converting my 1981 DeLorean...
Thank you,
Dave Delman
--- End Message ---
--- Begin Message ---
It is an Engineering test vehicle of PML's products without the desire to build
EVs. It cost PML $200,000 Euro's. 4 wheel motors, 4 motor controllers,
lithium-ion pack and has no brakes which eliminates it from any US roads as
braking has to occur even mechanically incase of power outage. Contacted them
myself to see if they had a product to sell.
Markus Wachsmuth <[EMAIL PROTECTED]> wrote:
Impressive performance: top speed, acceleration, range, torque, etc. for
a Mini that BMW wants to hear nothing about....
http://www.pmlflightlink.com/archive/news_mini.html
Just in case you hadn't taken note of this one yet....
---------------------------------
How low will we go? Check out Yahoo! Messengers low PC-to-Phone call rates.
--- End Message ---
--- Begin Message ---
Interesting and basically free, but I would worry that some will use
this idea to replace or sell as a tire pressure warning system.
First, it requires you to be driving. It would probably be a good idea
to inform a driver they have a low or flat tire before they get moving.
Second, I assume it must go a few miles or at least blocks to make the
determination, and has to have steering angle input to remove
accumulative error from turning. If I have run over a nail and the tire
pressure is dropping rapididly (like flat in a few minutes) I still
want to know about it as early as possible.
I just think if we want to know pressure we should measure pressure.
I wonder about some of the possible ideas
sensor in rim passes magnet to generate the power needed to measure
and transmit reading to receiver mounted in board.
wild and crazy idea, switch to air bearings run at 100psi from on board
air. and internal regulator will reduce the pressure to that which the
tire needs and keep it inflated, even during slow leaks. Measureing the
air used is the feedback for leak detection. The obvious question: Will
the energy lost compressing the air be offset by the reduced rolling
resistance? Obviouse answer: probably not, tire flexing and brake drag
are probably orders of magnitude greater than bearing drag
--- End Message ---
--- Begin Message ---
[EMAIL PROTECTED] wrote:
I am new to this list and have a couple of questions.
1) I get many individual emails from this list. Is there a way to get one
dail log or something else?
2) Can anyone recommend a site where I can learn about how EV controllers
work and perhaps even see plans or a schematic?
Looking into converting my 1981 DeLorean...
Thank you,
Dave Delman
You can get the list in 'digest' form, please read:
http://www.madkatz.com/ev/evlist.html
--
Paul Wujek ([EMAIL PROTECTED]) h:(905)279-5885 c:(416)892-5885
--- End Message ---
--- Begin Message ---
Thank you ...
It pays to RTFM!
[EMAIL PROTECTED] wrote:
> I am new to this list and have a couple of questions.
>
> 1) I get many individual emails from this list. Is there a way to get
one
> dail log or something else?
>
> 2) Can anyone recommend a site where I can learn about how EV controllers
> work and perhaps even see plans or a schematic?
>
> Looking into converting my 1981 DeLorean...
>
> Thank you,
>
> Dave Delman
>
>
>
You can get the list in 'digest' form, please read:
http://www.madkatz.com/ev/evlist.html
--
Paul Wujek ([EMAIL PROTECTED]) h:(905)279-5885 c:(416)892-5885
Thank you,
Dave
--- End Message ---
--- Begin Message ---
How come there is not motor labels on the ADC or Warp motors like GE,
Westinghouse, Balden etc, which list the Maker - HP - Amps - Volts - RPM -
and model number.
If you look up any of these motors on any venders motor listing, they will
not list the RPM.
What are they hiding?
My GE 11.5 inch motor has a label that states:
General Electric
165 volt @ 175 amp 32 HP
Encl. -BV- 5925 RPM
No GL-42-33
Model 5912366C5
So if a 11 inch motor can do 6000 rpm, a 9 inch should be at least do that
if its built right.
If you do not have a motor tach, then you can use the mph as a indicator of
RPM.
Example:
Using the formula
RPM x Tire Diameter
MPH = ----------------------
Gear Ratio x 1056
My 1st gear overall ratio = 26 mph at 6000 RPM
My 2nd gear overall ratio = 38 mph at 6000 RPM
My 3rd gear overall ratio = 92 mph at 6000 RPM
So I know to shift before or at these speeds to keep it below 6000 RPM.
Roland
----- Original Message -----
From: "Jim Husted" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, September 04, 2006 7:54 AM
Subject: Re: 5000 rpms safe for a 9" ADC?
> Hey Mark
>
> I believe that ADC states the 9" at 5K for a maximum now. All of the
> exploded comms I've seen have been spun out without data to RPM's. The
> best data I have is a commuttor that was cracked (in three places at 7K
> when John Benson was setting his rev limiter (this was also a cold comm).
> The comm began ticking just as he reached 7K and set the unit 8^(
>
> As to wether the other comms were exceeding 7K or not is unknown, but
> probably were. At least they were probably into the high 6K's. I believe
> you should have no problem doing 5K with your ADC9, just don't come beat
> me up if it splodes, 8^P For what it's worth IMO the 9" should be good to
> 6K, then again I don't want to be held liable for any wrongness of my
> opinion.
> Hope this helps
> Jim Husted
> Hi-Torque Electric
>
> Mark Hastings <[EMAIL PROTECTED]> wrote:
> I have been using 4500 rpms as my limit but I'm wondering if 5k for
> cruising around would be safe in the long term for this motor. If it were
> I could do most all of my trip in 2nd gear and not have to shift so much
> into 3rd. 3rd is difficult becuase my tranny is failing and my clutch no
> longer functions.
> I'm driving the truck into the ground but I don't want to wreck the 9"
> motor. My trips last about 20 minutes twice a day everyday.
> Thanks,
> Mark Hastings
>
>
>
>
> ---------------------------------
> Get your email and more, right on the new Yahoo.com
>
>
--- End Message ---
--- Begin Message ---
----- Original Message -----
From: <[EMAIL PROTECTED]>
The specified range of the NmG is 30 miles. That does not mean that it
cannot be charged until the 30 miles have been driven. We do not expect
any range
issue with this arrangement, however, we are willing to deal with ANY
issues
that may arise.
Now that's the sprit , I like that "deal with ANY .." When I converted my
lawn mower I wanted to use if for my lawn biss but there where issues , but
I found ways to deal with them , and got one of those EV grins, . anybody
who say money can't buy happens hasn't bought a EV.
Steve clunn
Ken
--- End Message ---
--- Begin Message ---
----- Original Message -----
From: "Chris & Patrick" <[EMAIL PROTECTED]>
To: <[email protected]>
I'm concerned about how far I can push this pack. It has occurred to me
it's
probably not safe to go by Amp or Watt hrs used, as that does not take the
starting condition of the pack into account.
Learning to read the meter ( e meter or what ever your have ) and know what
its saying takes time and allot of looks at numbers that don't seem to mean
anything to you . One problem people have is that all the numbers are
dependent on what's happening and what happened a short while ago. The volt
reading will be different when the battery is on the charger , or being
loaded or after sitting for awhile . First thing to get some kind of
bearings I pick a fixed amp load , like what I normal cruse at , yours may
be 75 amp for a 120v system . Now while pulling 75 amp check the voltage ,
it will be between 12 and 10.5 , the 10.5 will be dead , the battery won't
really be all the way dead but close , you'll be able to let up on the go
peddle and the voltage will come up but your in the danger zone . The
voltage also starts to drop fast as you get close to empty so you want to
know when this starts happening . From 11v to 10.5 is where things start
falling fast . Another thing that happens , if you pull allot of amps out
fast the voltage will sage but will come back when the heavy load is
lifted.
Should I be looking at the voltage rather than measures of work to
determine
DoD? If so, what's the best way to do this - sitting still or under load,
and if the latter what *kind* of load?
The batteries do kind of the same thing when charging , between 14v and 15v
will go fast but the first part of the charge , the voltage will change slow
.
FWIW, I've been charging up to an emeter reading of 148-150V. When I turn
off the charger, the reading is about 130V give or take a couple volts.
You need to have the pack sit at 150 for 10 to 20 min. One way to tell if
your charging enough is to charge a little more each day and see if when you
drive your voltage is higher when you do your load test ( driving a 75 amps
and checking the voltage ). Its a good idea , when you start off , after a
mile to load the batteries and check the voltage , so you know you got a
charge and things are ok . Now after doing this for a week you'll know what
the voltage should be , if you are charging more and the voltage is higher
each day , then you know you have not been charging enough . If the voltage
stays the same then you don't want to go any higher .
After our longest days driving (low 20s miles so far), the resting pack
voltage has been ~122V (although accelerating say, up a hill it has
briefly
been <100V). Can someone give a newbie a voltage-sag explanation, what to
expect and what to beware of?
This all looks good , safe ,. One reason for getting to know your meter and
what its saying is so you can stay in the safe area , when you have to go
further than normal or something happens and you don't get to charge where
you though you would , you can buy watching your meter , driving slow enough
get where your going without hurting your batteries. I can't tell you how
many time I've poked along and though if I just drove 5 mph slower at the
start I wouldn't have to be driving so slow now , ... Lee posted a good
voltage chart awhile ago which I'm going to copy and put in a book , "
batteries are people to " if he doesn't complain and I can find it . .
Can someone explain to me how I can determine where my DoD lies on a 120V
pack of AGMs? I really want to treat them right!
allot of people on the list say " a newbe will kill his first pack " but
what I've found is that if your interested enough to ask about battery care
, then your half way there. When the time comes that you do take them into
the red , if you have been watching you meter before , you'll have first
hand info on what to watch out for.
Steve clunn
Thanks a bunch!
--- End Message ---
--- Begin Message ---
Death to All Spammers wrote:
Thanks for the support!!
I must admit I am surprised at the volume of negative responses. I
do have
some advice for those who are inhibited with negative opinions so
easily: Go
rent (or better yet buy) the DVD, "The Worlds Fastest Indian."
Watch it, pay
attention and take notes.
Ken
Haven't seen the movie, but when Anthony Hopkins was interviewed about
it, he discussed how the many years' obsession ruin the guy's marriage
and alienated his kids! It helps to have family interested in EVs, but
it's usually best to not use monitary arguments to convince anyone of
your choice, no matter how environmentally sound it may be.
Especially monetary arguments that aren't quite honest. That was my only
point. To borrow Al Gore's logic, these things don't make financial sense...
unless you care about the environment.
-O
--- End Message ---
--- Begin Message ---
My EV Porsche 924 is gone (sold ) and all I have is a pile of money :-) .
I'm going to spend it all on my next EV . Its a 68 Porsche 912 , very light
and at one time lived as a EV with a 8" motor and golf cart batteries on the
west coast. Awhile back I put another 8 " motor in it when it was Paul's but
when I did the first test run ( with 2k zilla ) the clutch couldn't handle
the power , not even close so the car has sat for along time , I just
bought it from Paul and am now thinking of how I'll set it up for me :-). I
have my long distance EV , my work truck , so this will be my other EV and
doesn't need much distance , 10 miles would be fine . I'm thinking a fun
fast , light car. One for BBB and the once a month auto cross that going on
in my town. I have 2 9's that I've been thinking of putting in but before
doing so I though I'd ask the list . The brushes on the 8"s look much
smaller compared to the net gain 9's so I'm leaning toward 9's . I see where
Jim say 6k on the 9's , would 8's be better so as to get higher rpm , tranny
would probable like less torque and more rpm. Why are some of the fastest
cars running 2 8's instead of 2 9's ? I'll be keeping the tranny for
now , but will not have a clutch, .
Which batteries ?
EV parts has a small 14ah battery that puts out 900 amps
http://www.evparts.com/shopping/product_details.php?id=92&product_id=1907
and weights 12 lbs that looks good . The other battery I've been thinking
about is the hawker odyssey , 24ah , 1510 I believe the number is . I could
get some distance with that , but more weight , I'm planning on 348v pack.
Thanks for your input ( said the motor to the controller)
Steve Clunn
--- End Message ---
--- Begin Message ---
Richard Acuti wrote:
> the Comuta VAN bumpers are black foam adhesived to a square hollow
> metal tube. Behind the bumpers, and sort of inside the body are
> large, black cylinders filled with something that are meant to
> absorb an impact... they make sort of a "crumple zone".
The ComutaVan's bumper and crash protection structure is unique. But it
was crash tested in 1980, and passed. This meant surviving a 5 mph
impact with no damage, and a 45 mph impact with no penetrations into the
driver's compartment.
The bumpers are blocks of black foam plastic, about 5" square and 60"
long. Inside this foam is a 1/8" wall aluminum square tube about 1.5"
square.
The bumpers bolt directly to the battery boxes. Each 5-sided battery box
is about 24" x 24" x 12" high, made of 1/8" thick aluminum sheet, and
holds six 6v golf cart batteries.
The combination of the bumper and battery box are attached to the frame
by 3 large telescoping shock absorbers. These are commercial parts,
designed for some regular car or truck, and designed specifically for
energy-absorbing bumpers.
There's room for the bumper/battery assembly to move at least 6" into
the vehicle before it hits anything else. Beyond that, it impacts the
front or rear axle, and the frame itself begins absorbing the impact.
The photos of the 45 mph front impact test I saw showed the front end
"shortened" about 18" and the front axle bent and moved rearward; but
the doors still worked, the windshield wasn't broken, and there were no
intrusions into the interior.
My point in all this is that the front end is basically a square block,
without the slightest attempt at streamlining. So, I think it would make
sense to take a 5' wide piece of plastic, bend it in a half-circle about
12" in diameter, and place it over the front bumper assembly. It would
cover up the ugly nose, the disintegrating foam rubber bumper, and
streamline the nose nicely.
--
"Never doubt that the work of a small group of thoughtful, committed
citizens can change the world. Indeed, it's the only thing that ever
has!" -- Margaret Mead
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
--- End Message ---
--- Begin Message ---
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[email protected]>
Cc: <[EMAIL PROTECTED]>
Sent: Monday, September 04, 2006 9:41 AM
Subject: Re: NmG dealership in Texas!
> In a message dated 9/2/2006 11:17:49 PM Central Standard Time,
> [EMAIL PROTECTED] writes:
> Let's hope that your experience turns out well with timely delivery of
> the car and few or no serious hassles getting it financed, licensed,
> insured,
> serviced and repaired.
>
> $200 per month won't cover payments on a $25000 car.
>
> ----- Original Message -----
> From: <[EMAIL PROTECTED]>
> To: <[email protected]>; <[EMAIL PROTECTED]>
> Sent: Saturday, September 02, 2006 2:43 PM
> Subject: NmG dealership in Texas!
>
> Snip_A_bit>
> Sorry, too late for that negative. The car is already financed and
insured.
> The registration is still pending, but, if there is a problem there we
will
> deal with it.
>
> Heidi's life career has been in finance and business management. She is
> quite good at it!
>
> We do not expect any service or repair issues. The dealership is also a
> service center. However, If the dealer won't or can't handle it, I will.
>
> Ken
>
> Hi Ken an' Heidi;
Now THATS the EV Spirit, as well as grin! I don't see any issues here,
in fact I think it, the EV Thing will enrich BOTH your lives. Pull you
closer together! For youse guys that your WIFE or Significent Other is into
EV's WITH you. You are truly blessed.I can't see why not IF the EV is a good
job and she or he can use it, to.
The" Worlds Fastest Indian"? I loved it!" Like Field of Dreams"If WE
Build it, will they Come?" Tucker, the Man and his Dreams"; See it, and
weep!I Just got on Ebay" Taken for a Ride"A documentary as to WHY we don't
have a Pathetic(Pacific) Electric in LA Nowadaze.OK I'm again drifting off
topic. But suggest picking up these flicks at Bussblocker, to watch while
yur EV is charging. OTHER OT stuff: A Grandkid! At Last! A new EVer in the
works, Sept1st 9.8 lbs 23 " How can something so tiny be so BIG????.
Considering the delivery system. This was right up there with Zombie blowing
away ' Vettes and flying 150 MPH Acela expresses!Only two weaks late! Worse
than EVen Amtrak!!Got motors wheels and stuff easrmarked for this Budding
EVer.
My two watts worth;
Bob
--- End Message ---
--- Begin Message ---
Saw this the other day about making capacitors that could replace batteries.
http://www.sciencentral.com/articles/view.php3?type=article&article_id=218392803
On Sunday 03 September 2006 11:12 pm, Danny Miller wrote:
> Capacitors have promise for allowing you to get short burts of powerful
> acceleration from a battery which can't supply such high current
> surges. While it's hard to say what's possible, the capabilities to
> replace bulk battery storage are not there today and it doesn't sound
> like there's anything on the horizon which could.
>
> The "aluminum battery" has been discussed here before. General opinion
> was that they didn't sound credible at all. Only holdouts were those
> people suggesting maybe they could have something going but the language
> barrier got in the way. IIRC they were making bold claims of the
> potential of their technology but it sounded like they didn't even have
> a lab prototype made to know if the principle was sound.
>
> There's an "aluminum-air" primary (non-rechargeable) battery. That's
> real but non-rechargeable cells are not very useful for an EV.
>
> Danny
>
> Ryan Stotts wrote:
> > Is any of this stuff going to be a reality, or is it just the same old
> > story?
> >
> > http://electricperformance.com/forum/index.php?topic=11
--- End Message ---
--- Begin Message ---
From: Bob Bath <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: Still batteries
Date: Tue, 29 Aug 2006 17:34:56 -0700 (PDT)
Your 144V pack would spin faster than 96 volts.
Your 96 V pack would have less voltage sag when you
started pulling amps from them IF you were using 6V
batts., instead of 8V batts., (thicker plates = less
internal resistance),
I agree that you would get less sag from the 6V batteries for the same
current draw ( but not for the same power draw), but, not because the 6V
batteries' plates are thicker. For both Trojan and USB, the plates are
identical in their 6V and 8V golf cart batteries.
The difference is that the 8 volters have fewer plate per cell and more
cells, so the plates are the same, and the total number of plates are the
same ( or almost : for example, the 8VGC has 60 total plates and the 2200
has 57) but - they are just arranged into cells differently.
Phil
_________________________________________________________________
Check the weather nationwide with MSN Search: Try it now!
http://search.msn.com/results.aspx?q=weather&FORM=WLMTAG
--- End Message ---
--- Begin Message ---
Hi EVerybody;
It's THAT time again; Second Sat of the month, the 9th. racing up. Gees!
Where DID Summer go!? Anyhow, gunna do the Summer Season Ender Pic Nik thing
again. You know? Usual Fare; Dawgs and Burglers, chips, soda, standard fare.
Open Grill so bring that special con- coction, chop or steak.Well fire up
around noon, bring yur EV, got lottsa outlets! Expectin a t least ONE EV, Bill
Glickman's Bug, 74, 120 volt system. Any MORE? Don't be shy, bring your EV!Any
Newbees out here on the Least Coast, CT area?Or Oldbees, whatEVer? Seeya Sat?
Bob, Killingworth, CT, about 26 miles EAST of New Haven as the EV
flies.2800mi. east of PDX?
--- End Message ---
--- Begin Message ---
setup A: 6x 1000uf 450v capacitors in parrellel
setup B: 4x 1500uf 450v capacitors in parrellel
setup A is equal to setup B
yes?
looking for compatible components so I can try to build this guy's motor
controller for myself, haven't gotten a response for couple requests for
schematics (over a month waiting :o/ )
http://www.jstraubel.com/944EV/EVproject.htm
--- End Message ---
--- Begin Message ---
On 4 Sep 2006 at 9:25, [EMAIL PROTECTED] wrote:
> It is normal to take 30 minutes to
> go 10 miles - double that during rush hours. She works in an office
> environment and makes deliveries around the downtown Austin area. The NmG
> will
> be on charge between each trip.
Sounds like a good, solid, high quality e-bike (not a cheap scooter since
reliability is probably a concern) might have been a better choice than the
NMG / Sparrow. An EV of any kind is of course vastly superior in bumper to
bumper traffic, but an e-bike would let her work her way through the traffic
rather than sitting in it.
David Roden - Akron, Ohio, USA
EV List Assistant Administrator
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--- Begin Message ---
On 4 Sep 2006 at 10:49, [EMAIL PROTECTED] wrote:
> 1) I get many individual emails from this list. Is there a way to get one
> dail log or something else?
Information on setting digest mode may be found on the support page at
http://www.evdl.org/help/
This will not actually result in only one email per day, but it will reduce
the traffic to a few digests ("packages" of multiple emailed posts) per day.
How many you receive in a day depends entirely on how many posts were made
to the list that day.
If that's still too much traffic, you can set your subscription to receive
NO mail at all, then read the EV list from one of the many web archives.
Again, more information on setting MAIL POSTPONE mode, and on the archives,
is available at the above-listed support page.
David Roden - Akron, Ohio, USA
EV List Assistant Administrator
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Want to unsubscribe, stop the EV list mail while you're on vacation,
or switch to digest mode? See how: http://www.evdl.org/help/
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Note: mail sent to "evpost" or "etpost" addresses will not reach me.
To send a private message, please obtain my email address from
the webpage http://www.evdl.org/help/ - the former contact address
([EMAIL PROTECTED]) will soon disappear.
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On Sep 4, 2006, at 12:46 PM, Mark McCurdy wrote:
looking for compatible components so I can try to build this guy's
motor controller for myself, haven't gotten a response for couple
requests for schematics (over a month waiting :o/ )
http://www.jstraubel.com/944EV/EVproject.htm
"This guy" is now the chief technology officer of Tesla Motors, and I
figure he's probably fairly busy right about now.
<http://www.straubel.com/>
--
Doug Weathers
Las Cruces, NM, USA
<http://learn-something.blogsite.org/>
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Speaking of Texas....
I'm now in the "Clear Lake" section of Houston, Texas measuring air
chemistry (AKA pollution) on the NOAA WP3 aircraft out of Ellington
AFB. I'll be here for six weeks.
We measured 190 ppb of Ozone over the Houston ship channel. (This is
quite a large concentration to see aloft. You can smell it at that
concentration.)
If anyone has an EV project in the area, I'd be interested in
dropping by to visit. Contact me off-line
If you are badged for Ellington Field, I'd be happy to show you the
WP3. Unfortunately, if you don't already have a badge, you are not
allowed past the gate, so you can't visit the airplane. :-(
Bill Dube'
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On Sep 4, 2006, at 1:29 PM, David Roden wrote:
Sounds like a good, solid, high quality e-bike (not a cheap scooter
since
reliability is probably a concern) might have been a better choice
than the
NMG / Sparrow.
Another negative comment, and from a moderator as well.
This is extremely strange. Why are people so disapproving of Ken and
Heidi's purchase of a NmG Sparrow?
Is it because they're jealous and want to own a Sparrow themselves?
Is it some lingering negative feeling towards Corbin?
Is it because the posters think the Sparrow is too expensive?
I propose that Ken and Heidi are adults and are able to figure out for
themselves if they want and can afford ANY PARTICULAR ITEM. So they
decided to buy a Sparrow. As a member of the EV List, I believe that
this is a very good thing. It gets another EV on the road, it supports
Myers Motors, one of the very few EV manufacturers still standing, and
it gets another SUV off the road. What's not to like?
So c'mon folks, how about knocking off the negative comments? Let's
all be more like Bob Rice and *support* people with brand-new EV grins.
Three cheers for Ken and Heidi! Enjoy the new EV! And please tell us
all about how it works for you. We're all interested in the long-term
prospects of Myers Motors.
Later,
Doug
--
Doug Weathers
Las Cruces, NM, USA
<http://learn-something.blogsite.org/>
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*second cheer*
----- Original Message -----
From: "Doug Weathers" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, September 04, 2006 3:34 PM
Subject: Re: NmG dealership in Texas!
On Sep 4, 2006, at 1:29 PM, David Roden wrote:
Sounds like a good, solid, high quality e-bike (not a cheap scooter
since
reliability is probably a concern) might have been a better choice
than the
NMG / Sparrow.
Another negative comment, and from a moderator as well.
This is extremely strange. Why are people so disapproving of Ken and
Heidi's purchase of a NmG Sparrow?
Is it because they're jealous and want to own a Sparrow themselves?
Is it some lingering negative feeling towards Corbin?
Is it because the posters think the Sparrow is too expensive?
I propose that Ken and Heidi are adults and are able to figure out for
themselves if they want and can afford ANY PARTICULAR ITEM. So they
decided to buy a Sparrow. As a member of the EV List, I believe that
this is a very good thing. It gets another EV on the road, it supports
Myers Motors, one of the very few EV manufacturers still standing, and
it gets another SUV off the road. What's not to like?
So c'mon folks, how about knocking off the negative comments? Let's
all be more like Bob Rice and *support* people with brand-new EV grins.
Three cheers for Ken and Heidi! Enjoy the new EV! And please tell us
all about how it works for you. We're all interested in the long-term
prospects of Myers Motors.
Later,
Doug
--
Doug Weathers
Las Cruces, NM, USA
<http://learn-something.blogsite.org/>
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Found this on Ebay. Refurb Curtis PMC 1231C-8601 Motor Controller 144V 500A
Item number: 290025836603
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=290025836603
Ted
Olympia, WA
N47 02.743 W122 53.772
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On 4 Sep 2006 at 14:34, Doug Weathers wrote:
>
> Another negative comment, and from a moderator as well.
>
> This is extremely strange. Why are people so disapproving of Ken and
> Heidi's purchase of a NmG Sparrow?
Disapproving? Hardly. I'm glad they purchased an EV - make no mistake
about that.
Of course we want to encourage and congratulate EV purchasers. We also want
to be thougtful and polite. But I don't think any reasonable person would
want us to set aside our thought processes and just be cheerleaders. That
would be inappropriate and insincere.
I think everyone here understands that most of us have long histories of
examining transportation issues, and most of us consequently hold strong,
well-founded views. Nearly every situation will bring out heartfelt, honest
commentary. Within the bounds of human decency and consideration, that's as
it should be.
In this case certainly I meant no offense and I'm sure the same is true for
the others. All of us have written what we think of the situation.
Based on the limited information provided, I thought that maybe a smaller,
cheaper, lower-impact EV might have sufficed or even been superior, and I
said so. But please note - >the comment was based on the limited
information provided<. I don't live with the purchasers! Such decisions
are made on many considerations and we can't know all of them. Who knows,
there may be a reason that an e-bike would be entirely inappropriate for
this particular individual. Or maybe they just like the Sparrow. It's
certainly a likeable little vehicle.
I don't know for sure, but >on the face of it< it seems like an e-bike might
work well in this situation. Hence the comment. But it was nothing more
than that. I intended no criticism of anyone. My apologies if anyone took
it that way.
David Roden - Akron, Ohio, USA
EV List Assistant Administrator
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Want to unsubscribe, stop the EV list mail while you're on vacation,
or switch to digest mode? See how: http://www.evdl.org/help/
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Note: mail sent to "evpost" or "etpost" addresses will not reach me.
To send a private message, please obtain my email address from
the webpage http://www.evdl.org/help/ - the former contact address
([EMAIL PROTECTED]) will soon disappear.
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very nice cars, hehe
wonder if I can get a sample :op
----- Original Message -----
From: "Doug Weathers" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Monday, September 04, 2006 2:41 PM
Subject: Re: Capacitor question
On Sep 4, 2006, at 12:46 PM, Mark McCurdy wrote:
looking for compatible components so I can try to build this guy's
motor controller for myself, haven't gotten a response for couple
requests for schematics (over a month waiting :o/ )
http://www.jstraubel.com/944EV/EVproject.htm
"This guy" is now the chief technology officer of Tesla Motors, and I
figure he's probably fairly busy right about now.
<http://www.straubel.com/>
--
Doug Weathers
Las Cruces, NM, USA
<http://learn-something.blogsite.org/>
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Learning that Myers Motors has a dealership in Austin, Texas that has
sold a car stimulates my appetite for more news about Myers Motors.
Does anyone have more news about the company?
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Hi folks,
I thought I would share my latest. This past Wednesday, I received a
Lester 36 Volt battery tester from Eric Miller. This isn't your
regular battery load tester, this is a discharge tester. It applies
a 75 Amp load and counts the time until the voltage drops to 31.5
Volts for the string then shuts down. You then compare the original
reserve capacity rating at 75 Amps with the counted minutes to get
the available capacity of the batteries.
In my case, rather than using it to check golf cart batteries, I
decided to check the 12 Volt Dynasty DCS-100L Deep Cycle Series AGMs
in my Civic. The results were quite disappointing. I knew my range
was dropping off, as the car was now struggling to cover 12
miles. The energy use reported by the E-meter still looked good, 210
to 260 Watt-hours per mile, so the car wasn't wasting it, the
batteries were just not delivering it. I tested the pack in groups
of three batteries, and since I have a 13 battery system, I recharged
two from the first test and tested them again with a third battery to
make 36 Volts. The best three batteries held on for only 21.26
minutes, the worst for only 15.13 minutes. At 75 Amps, 21.26 minutes
is only 26.5 Amp-hours, only 54% of the rated 1 hour capacity of 49.2
Amp-hours. This is on a set of batteries that are only 10 months old
and are always shallow cycled.
The results were so poor, I actually questioned them, so I pulled out
the old batteries that were in the Civic previously, a set of
used/blem Dynasty High-Rate Series UPS12-370 AGMs made in March
2004. They have been sitting on the floor in the garage, basically
ignored, since November 2005. I pulled three that had similar
voltages and charged them in series, then tested them. What a
difference! These went 40.21 minutes, or 50.26 Amp-hours. That is
78% of the rated capacity 64.2 AH at the 1 hour rate. I could live
with this, that would be a range of about 30-35 miles.
Now the results were so good I didn't believe them, so I repeated the
test on the best three batteries in the car after a full charge and
equalization. Well, they did better the second time, bit only
barely. They lasted 54 seconds longer, an improvement of 1.1 Amp hours.
So, after all this, I think I can safely say that the Dynasty
DCS-100L batteries are probably not a suitable choice for my Civic EV
and quite probably most EVs. Even used Dynasty High-Rate units seem
to be a better choice, especially since I was getting them for only
$20 each. I hope I can still get them.
Any opinions?
BTW, there are two more of these testers for sale on the EV Tradin'
Post at http://evtradinpost.com
Thanks,
Mike Chancey,
'88 Civic EV
Kansas City, Missouri
EV Photo Album at: http://evalbum.com
My Electric Car at: http://www.geocities.com/electric_honda
Mid-America EAA chapter at: http://maeaa.org
Join the EV List at: http://www.madkatz.com/ev/evlist.html
In medio stat virtus - Virtue is in the moderate, not the extreme
position. (Horace)
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I retired from the Los Angeles Dept of water and power. I worked in
close proximity of 230;000 volts daily'and sometimes around 500;000volts and
know
of any one having any problems including myself. an electric vehicle couldn't
possibly cause you any harm except if the controller has a whine which could
cause a headache.
Larry Cronk 72 Datsun Elec
tk
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Jeff Shanab wrote:
> I just searched thru 200 evlist digests and looks like we
> never got the max voltage rating of these units. Does
> anyone know?
>
> I have a 288 pack whose end of charge is 354 and don't want
> to kill the new dc-dc.
Jeff, assuming the "220" in the model number refers to 220VAC input,
then this Iota must be able to handle the peak of the rectified 220VAC
line, or about 365VDC. I wouldn't expect it to take much more, as it
probably has 400VDC rated caps, etc.
Hope this helps,
Roger.
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Mark McCurdy wrote:
> setup A: 6x 1000uf 450v capacitors in parrellel
> setup B: 4x 1500uf 450v capacitors in parrellel
>
> setup A is equal to setup B yes?
No, not necessarily. Both have the same capacitance, but the more
important feature you want in controller bus caps is ripple handling
ability.
You would have to look up the specs of each and check to see that the
ripple rating is; it is quite possible that the 6x1000uF caps will have
lower ESR and greater ripple capability, but not guaranteed (the
physical dimensions of the cap impact its ripple rating as does its
capacitance).
Hope this helps,
Roger.
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