EV Digest 4573

Topics covered in this issue include:

  1) RE: New EV bikes?
        by "Mark Fowler" <[EMAIL PROTECTED]>
  2) Re: New EV bikes?
        by Lee Hart <[EMAIL PROTECTED]>
  3) Re: EV-200 Resistor for 144v system
        by "Paul G." <[EMAIL PROTECTED]>
  4) Re: New EV bikes?
        by Andrew Letton <[EMAIL PROTECTED]>
  5) Re: Custom Contactor
        by Lee Hart <[EMAIL PROTECTED]>
  6) Re: EV-200 Resistor for 144v system
        by Lee Hart <[EMAIL PROTECTED]>
  7) Re: Efficiency, ADC 5.5" (was: RE: John's GT-6)
        by Lee Hart <[EMAIL PROTECTED]>
  8) RE: Got my EV Grin :-)
        by "Don Cameron" <[EMAIL PROTECTED]>
  9) Re: New EV bikes?
        by "Joe Vitek" <[EMAIL PROTECTED]>
 10) Kilovac EV250
        by Jeff Shanab <[EMAIL PROTECTED]>
 11) Pick up choice,     Re: A new member waves hello
        by jerry dycus <[EMAIL PROTECTED]>
 12) Re: Wayland Invitational Street Drags
        by "Rich Rudman" <[EMAIL PROTECTED]>
 13) Re: New EV bikes?
        by Ken Trough <[EMAIL PROTECTED]>
 14) RE: Conversion Details
        by Jeff Shanab <[EMAIL PROTECTED]>
 15) Re: Wayland Invitational Street Drags
        by Ryan Stotts <[EMAIL PROTECTED]>
 16) Re: FW: New EV - Question
        by Lee Hart <[EMAIL PROTECTED]>
 17) Re: Auto-determination of AC current available
        by Lee Hart <[EMAIL PROTECTED]>
 18) China's Cyclists Take Charge
        by Lock Hughes <[EMAIL PROTECTED]>
 19) Re: Auto-determination of AC current available
        by Danny Miller <[EMAIL PROTECTED]>
--- Begin Message ---
I'm not sure that these bikes exist anywhere except in Verdra H
Ciretop's imagination.
A quick bit of Googling turned up a couple of references to this
article, but nothing else.
I looked on Specialized's web site http://www.specialized.com and
couldn't find anything but normal bikes - even in the New for 2006
section.

Ob. Ev:
So if you were designing an EV bike from scratch (with no requirement to
look anything like a conventional bike) what would you do?
Where would you mount the batts?
How would you attach the motor?
Traditional seating or recumbent?
Pedals or just electric power? 

Mark

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of reb
Sent: Saturday, 13 August 2005 3:28 AM
To: [email protected]
Subject: Re: New EV bikes?


great link rod !!
i would really like one of these
2000 W and100AH would do for me
any one got enough cash here to build one ?
reb

Rod Hower <[EMAIL PROTECTED]> wrote:
I just seen these new styles for bicycles and thought
they would be good candidates for EV's. Lots of space
in the frame for batteries.
http://www.mountainbiketales.com/Verdra3.htm


                
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--- End Message ---
--- Begin Message ---
Rod Hower wrote:
> I just seen these new styles for bicycles and thought
> they would be good candidates for EV's.  Lots of space
> in the frame for batteries.
> http://www.mountainbiketales.com/Verdra3.htm

Aerodynamic my foot! :-)  Looks more like styling.
-- 
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---

On Aug 12, 2005, at 10:45 AM, Lee Hart wrote:

The relay (or switch or MOSFET or whatever) is there so the precharge
resistor isn't left connected all the time. If it is, it will leave the
controller "armed and dangerous" all the time. A fault condition can run
the motor. You'd be surprised how far an EV can move just on the energy
stored in the controller's capacitors!


I'd say, from experience, about 6 inches in second gear (I have never tried it in first.) This is in my EV Buggy, only 1420lbs and powered by a Curtis 1221B. The controller is left precharged, but between the demand of the ksi circuit and the precharging the main cap bank (likely with bleed down resistor) the 13 watt "group bulb" (think carnival rides) drops 36 volts. So this movement is with about 94 volts on the controller.

I should point out that this means the car will move that much when its OFF and the key is out.

Paul "neon" G.

--- End Message ---
--- Begin Message ---
Um...
"Specialized unveiled the bikes at a special media conference in Tokyo on November 31st." Last I checked, November didn't have a "31st". Is it maybe like April 1st? ;-)
Andrew

Mark Fowler wrote:

I'm not sure that these bikes exist anywhere except in Verdra H
Ciretop's imagination.
A quick bit of Googling turned up a couple of references to this
article, but nothing else.
I looked on Specialized's web site http://www.specialized.com and
couldn't find anything but normal bikes - even in the New for 2006
section.

Ob. Ev:
So if you were designing an EV bike from scratch (with no requirement to
look anything like a conventional bike) what would you do?
Where would you mount the batts?
How would you attach the motor?
Traditional seating or recumbent?
Pedals or just electric power?
Mark

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of reb
Sent: Saturday, 13 August 2005 3:28 AM
To: [email protected]
Subject: Re: New EV bikes?


great link rod !!
i would really like one of these
2000 W and100AH would do for me
any one got enough cash here to build one ?
reb

Rod Hower <[EMAIL PROTECTED]> wrote:
I just seen these new styles for bicycles and thought
they would be good candidates for EV's. Lots of space
in the frame for batteries.
http://www.mountainbiketales.com/Verdra3.htm


                
---------------------------------
To help you stay safe and secure online, we've developed the all new
Yahoo! Security Centre.



--- End Message ---
--- Begin Message ---
Mike Barber wrote:
> It seems like a contactor is not really built by anyone at a good
> price for an electric vehicle application. Is this not technically
> feasible, or is there just not a market for it?

No, there are lots of contactors that will work just fine. Remember that
when people say they have a 1000 amp controller, that is the MOTOR
current, not the battery current. The battery current is actually much
less.

Under normal conditions, you size your contactor according to the
AVERAGE battery current. Rarely will it exceed 200 amps, except for a
very heavy EV or for serious drag racers.

The other thing you worry about is the FAULT current; what current does
the contactor need to break if asked to turn off in the event of a
controller failure. This current could easily exceed 1000 amps.
Hopefully you have a fuse or circuit breaker to handle this case, but if
not, the contactor needs to survive it at least once.

> What kind of gotchas would one run in to if they tried making
> something like this on their own?

You can build your own. But like most bits of technology that have been
around for 100+years, there are lots of subtleties that aren't obvious.
Your best bet would be to carefully copy a known-good design. Even then,
you will miss details, like exactly what alloy they used (and why!) 
You'll be tempted to leave off parts, not knowing why they were there.
So your home-made version may not work as well.
-- 
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---
Victor Tikhonov wrote:
> For those using ceramic (or other) heaters - why not use
> heating element as a precharge resistor? It's already there
> and sized right.

You could. It just takes the appropriate switching.
-- 
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---
David Roden wrote:
> Didn't the Chrysler TeVan use a 2-speed transaxle? For that matter,
> the Comuta-Vans used a moldy old 3-speed Borg Warner, if I'm not
> mistaken.

I think you are correct. But both of these were quickie designs, done in
a hurry on a small budget by inexperienced engineers. It's "safer" to
include a shiftable gearbox when you aren't sure what ratio you will
need.
--
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---
Jeff, great to hear!  Any pictures? 


Victoria, BC, Canada
 
See the New Beetle EV Conversion Web Site at
www.cameronsoftware.com/ev/

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Jeff Wilson
Sent: August 11, 2005 10:13 PM
To: [email protected]
Subject: Got my EV Grin :-)

Good EVening to EVeryone out there!

 

I just wanted to let the world know that I now have a huge EV grin!  I got
my E-10 running and charged last night at about midnight and so after work
and other stuff I finally got to take the truck out for a joy ride at about
9:45 PM.  My wife came with on the maiden voyage.  We had a ball!  We drove
all over the neighborhood for about 20 minutes.  Then my wife asked if she
could drive home!  I knew I married her for a good reason.  I just can't
imagine too many wives out there going out on the first test run much less
asking to drive it as well.  Anyway, I have to break in the new batteries so
we could only go a short distance and call it a night. I burned off about 6
AH in a little over 8 miles.  With regen, it takes a while to use up the
amps while in stop and go neighborhood driving.  When we got home we were
talking about the paint.  The truck had been sitting in the AZ sun, baking
the clear coat off for over 9 years.  It is kind of an emerald green so it
really took a beating.  On top of that, a couple of birds had their way with
the hood and roof so there are a few spots where the paint was eaten right
down to the bare metal.  My wonderful wife of 21 years suggested we have it
painted dark purple with flames!!!  I almost fell over my jaw!  

 

I just got it charged back up and put to bed.  It's my turn for bed now.
like I'm really going to get to sleep now!!

 

Thanks again to Victor Tikhonov, Jim Husted, David Roden, especially Tom
Hudson, and everyone else who helped me overcome many of the startup
problems this truck had.

 

EV GRININ' now!

 

Jeff Wilson

USA(Ret)

 

 

 

 

 

 

Thou shalt not send me any thing which says unto thee, "send this to all
thou knowest." Neither shalt thou send me any spam, lest I smite thee.
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Est.
yearly US cost to safeguard Persian Gulf oil supply: $50 billion Est.
2001 value of US crude oil imports from Persian Gulf: $19 billion
-- Harper's Index, April 2002 

 

--- End Message ---
--- Begin Message ---
> I just seen these new styles for bicycles and thought
> they would be good candidates for EV's.  Lots of space
> in the frame for batteries.
> http://www.mountainbiketales.com/Verdra3.htm

It's a hoax. Actually, an April Fool's joke originally that has gotten around 
the 'net.

http://eyeteeth.blogspot.com/2005/07/venom-line.html

Read the last one.

--
joe

--- End Message ---
--- Begin Message ---
If I recall correctly the ev250's arn't just sealed, they are filled
with hydrogen. Must make a heck of a bang if the leak and get some O2 in
them. I think this allows them to be so small for the ratings

--- End Message ---
--- Begin Message ---
       Hi Michaela and All,

--- Michaela Merz <[EMAIL PROTECTED]> wrote:

> 
> Hello Everybody:
> 
> After looking around for quite some time, I was
> finally able to get my
> first EV. While it is an old Nissan PickUp
> conversion with Prestolite
> engine, it runs great and it helps me to understand
> the 'workings' of
> electric vehicles and we (my husband and I) are
> going to convert our very
> own truck in autumn.
> 
> I already added a ice/c .. an air conditioner based
> on a cooler filled
> with ice cubes, a transmission oil cooler plumped
> into the ventilation
> system and hoses circulating ice water around. The
> air coming out of the
> vents is about 10 to 15 degrees cooler than ambient
> but the ice cubes are
> melting very rapidly. So - the system works, costs
> were about 100$ but ice
> is expensive.

     You could make your own in your home freezer to
save money.
     But for your new one if it has an AC, you can
just get a pack voltage 1hp motor to turn it or use a
double shaft motor for the drive and hook the
compressure to the second shaft. One person uses it
for braking so instead of wasting brakes, it cools the
EV with the brakingenergy. This works well in stop and
go traffic with the clutch hooked to the brake lights.
     And a second on switch for when you don't have to
stop much. 


> 
> Now my question: I am planning to do a conversion
> based on a pick up
> truck. I am shooting for an S-10 but should I get a
> pre-94 or a newer
> model? Am I going to be able to disconnect power
> steering and still
> control the truck?

    The older one you get, the lighter, smaller
frontal area for less drag, thus better EV it will
make. I'd even consder upgrading your present one if
it's one of the light, older ones.
    If you can find a Rampage, VW Rabbit or one of the
small El Cameno's pick ups would be even better. 
    Your motor isn't the best as less eff than most
others.
    As for power steering, you can switch the steering
box to a manual one for ease of steering. Just by
moving very slowly you will find manuals are quite
easy to steer. I never liked power steering even in
ICE cars, trucks or power brakes which are easier to
change if nessasary.
                 HTH's,
                   Jerry Dycus
> 
> Thanks and should you be in the Bay City, Tx or
> Blessing, Tx area you are
> welcome to charge up here.
> 
> Michaela
> 
> 



                
____________________________________________________
Start your day with Yahoo! - make it your home page 
http://www.yahoo.com/r/hs 
 

--- End Message ---
--- Begin Message ---
Still got Fiero... 
It does not have a tow bar hitch, it needs a trailer.

I could have a Raptor 1200 in it and do wheelies..

But I have no way of towing it.

Madman

----- Original Message ----- 
From: "Roy LeMeur" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, August 12, 2005 10:04 AM
Subject: Re: Wayland Invitational Street Drags


> 
> Madman wrote:
> >Biddness is getting in the way of racing.
> >I am still going to be on the track . But nothing new...
> 
> How about the Fiero?
> You still got that?
> 
> May not be new, but is different  :^D
> 
> We missed ya at the SEVA meeting, seeya in Portland!
> .
> 
> 
> 
> 
> Roy LeMeur
> Olympia WA
> 
> My Electric Vehicle Pages:
> http://www.angelfire.com/ca4/renewables/evpage.html
> 
> Informative Electric Vehicle Links:
> http://www.angelfire.com/ca4/renewables/evlinks.html
> 
> EV Parts/Gone Postal Photo Galleries:
> http://www.casadelgato.com/RoyLemeur/page01.htm
> 

--- End Message ---
--- Begin Message --- "Specialized unveiled the bikes at a special media conference in Tokyo on November 31st."

Yet this story was posted on November 20th, ahead of the supposed unveiling.

If you read the text, the systems they describe are very complex. The bikes look like spun glass, yet are supposed to be super stiff and contain all these advanced hydraulic drive tech and so forth.

For these designs to be working prototypes, I think they'd have to be using bleeding edge materials science among other things in order for these products to to meet the descriptions offered. In other words, an exotic not a consumer product.

I believe these images are little more than artist whimsy. They don't look like engineering concepts and certainly not like prototypes. Nice stylish lines, but I don't think they'll get these concepts into prototype stage any time soon. Certainly don't expect to see them offered in 2006.

Also, this could be a totally bogus social viral seed. I've seen new designs unveiled before that were totally faked, having nothing to do with the brands mentioned. Sometimes people just like to make things up, sometimes it is part of some social experiment and they are tracking responses. I'm not saying it IS totally fake, only that it looks like it could be.

-Ken Trough
Admin - V is for Voltage Magazine
http://visforvoltage.com
AIM - ktrough
FAX/voice message - 206-339-VOLT (8658)

--- End Message ---
--- Begin Message ---
I found this chart http://www.geocities.com/~z-car/specs/ which shows
the 87 I have to weigh about 200 less than the 95 body style, Glass is
heavy and these cars are really built tough.  The motor was lighter in
the 95, they made a big tadoo about that so I think the weight is in the
body. The 240sx would probably be a better choice. I live in Fresno and
it would take a complete charge just to get to a hill.
I haven't weighed the motor yet but
http://www.datsuns.com/510/510_weight_discussion.htm   says 355 to 392
LBS so 392-165 = 227 lbs lost up front = 5 to 6 orbitals I weighed the
tranny and it is 100 lbs with lub. gasoline at 8lbsa/gal * 20 is 160
behind rear axle so 4 orbitals there that is my first 10.  I am gonna
play with this more this weekend.

--- End Message ---
--- Begin Message ---
Rich Rudman wrote:

> it needs a trailer.
> But I have no way of towing it.


Could rent a truck and trailer?

http://www.uhaul.com/towing/ 

http://www.pensketruckrental.com/personal_rental/towing/index.html 

http://www.budgettruck.com/budgettruck/content/equipment/moving_accessories/default.asp

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Danny Miller wrote:
> I can dream, can't I?  Besides, a small enough vehicle, more like a
> motorcycle, might be able to find an acceptable wheel motor.

Well, there are ways...

My BEST kids have built direct-drive vehicles with normal high-rpm DC
motors. You just have to use very small wheels.

For example, suppose you have a 12v automotive fan motor that runs at
3000 rpm. It's about 3" in diameter. A 5" diameter wheel on its shaft
gives you 1" of ground clearance. Not much, but the motor moves up/down
with the wheel, so it's enough.

A 5" wheel at 3000 rpm is 45 mph. Kinda fast! Ok, so use two such motors
with wheels. Wire them in series, and you are cruising at 22 mph -- just
about right for a scooter! :-)

Or here's an even cleverer trick. One year we provided EV Warrior (Ford
radiator fan) motors, which are more like 4.5" diameter. To get a small
enough tire on it to work, they attached a 3' long shaft to the motor,
and put a 3" skateboard wheel at the far end. The long shaft meant only
a slight angle was needed to elevate the motor far enough above the road
for ground clearance, without the angle between wheel and road being
excessive. Two such wheels and motors were used. The ratio was actually
good enough to run them at their full 12v.
-- 
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---
acid_lead wrote:
> 
> For EV opportunity charging, you still don't know what other loads are
> on the breaker, and that could change after you set something manually.
> 
> If a circuit becomes overloaded, does the voltage drop measurably
> prior to the breaker opening? What would it take to sense that?

Well, it drops -- but from one unknown voltage to another unknown
voltage. And the drops due to load current are too small and too
unpredictable to be used to estimate load current.

For example, a "120vac" outlet might actually vary from 115-125v
depending on time of day and other factors. It might also sag 2 volts
from no-load to max-load current. So if it measures 118v, you can't tell
if that's because it's supplying its full load current, or it's just a
hot summer day and all the AC outlets are low in voltage.
--
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---
--- Begin Message ---
Seen here:
<http://www.spectrum.ieee.org/WEBONLY/publicfeature/jun05/0605ccyc.html>
or tinyurl here:
<http://tinyurl.com/cjczl>

CHINA'S CYCLISTS TAKE CHARGE

ELECTRIC BICYCLES ARE SELLING BY THE MILLIONS DESPITE EFFORTS TO BAN
THEM 

BY PETER FAIRLEY 

It's 8 a.m. and Shanghai is moving. 

For the cars and trucks crammed together on the elevated highway
cutting through downtown, it's a slow crawl. On the smaller roads
below, traffic is rolling at a steady 10 to 15 kilometers per hour in
what looks like a more traditional Chinese street scene. Vying with the
cars and trucks for the same strip of pavement are a motley assortment
of two- and three-wheeled vehicles—everything from simple steel-frame
bikes and heavily laden pedal-powered carts to motorized scooters. 

Hidden within this stream is an entirely novel, homegrown class of
commuter vehicle: electric bikes and scooters [see photo, "Moving"].
There are an estimated 1 million electric two-wheelers on Shanghai's
streets; yet to the Western observer it is only what's missing that
gives them away. Some look like scooters, but they have no tailpipe
spewing exhaust, no sputtering engine. Some look like fanciful
bicycles, but their pedals are oddly still as riders relax and let the
battery-powered electric motor whisk them to work. 

For all the talk of China's growing infatuation with automobiles, the
world's most populous nation continues to roll primarily on two
wheels—and, increasingly, an electric motor drives them. The China
Bicycle Association, a government-chartered industry group in Beijing,
estimates that last year manufacturers sold 7.5 million electric bikes
nationwide—nearly double the sales in 2003—and they are likely to ship
more than 10 million this year. That's three times as many as the most
optimistic projections for auto sales in China. 

There's a powerful desire for motorized personal transportation in
China as its cities sprawl. The electric bicycle is an attractive
option for commuters, service people, and couriers [see photo, "Pizza!
Pizza!"]. At 1500 to 3000 yuan (US $180 to $360), an electric bike is
buyable at a small fraction of the cost of an automobile. It is also
exhilarating. Hop on and crank the throttle, and an electric motor
built into the hub propels you to speeds of 20 km/h or more. 

Despite the obvious appeal of electric bikes, some Chinese cities have
banned them altogether, alleging environmental drawbacks and concerns
about public safety. But that hasn't stopped millions from buying
electric two-wheelers in China—an astonishing development for advocates
who have struggled for a decade to build a market for electric bikes in
the United States and Europe. 

"It is the dawn of a new era in electric bicycles," says Frank E.
Jamerson, a former leader in electric vehicle R&D at General Motors
Corp. whose Naples, Fla.-based consultancy recently completed a
worldwide review of developments in light electric vehicles. "The
electric bike is now a real player." Jamerson says China's electric
bicycles accounted for roughly three-quarters of the electric vehicles
(EVs) sold worldwide last year. 

"Courtesy of the Chinese domestic market, we now have very cheap
electric propulsion systems that will move a human being," says Ed
Benjamin, vice president of the Light Transport Division at
electric-propulsion-technology firm WaveCrest Laboratories LLC, in
Dulles, Va., and an authority on electric-bicycle markets. "The
question is: what are we going to do with them? I'd say we don't know
yet." 

A BLEND OF NECESSITY AND OPPORTUNITY kick-started China's first
electric-bike manufacturer, Shanghai Cranes Electric Vehicle Co., based
in the Pudong section of Shanghai. The company descends from a
venture-capital arm of the Shanghai government that had been investing
in electric-drive technology in a bid to lead a new national
electric-automobile R&D program. When Shanghai lost the automobile
research bid to Guangzhou in 1994, Shanghai's EV team turned to
electric bikes, a type of vehicle that had begun to pop up on Japan's
streets the year before. 

A beta test of 100 of Shanghai Cranes' prototype bikes in 1995 revealed
that a lot more development work would be needed. In barely three
months of use, the motors burned out and the lead-acid
batteries—designed to be removed from the bikes and taken inside for
plug-in charges—no longer could take a charge. But the beta testers
found the bikes a blast to ride and handy for carrying parcels,
suggesting that a more durable product would find a ready market. When
Shanghai banned sales of gas scooters (and their polluting two-stroke
engines) in 1996, Cranes was spun out of an R&D incubator to fill the
market void. 

Zhang Min Wei, Cranes' reserved general manager, becomes animated when
recalling the 1997 rollout of the company's first products. They were
conventional bike frames outfitted with a 150- or 180-watt hub motor in
the front wheel, a 24-volt, 7-ampere-hour lead-acid battery on the rear
rack, and a simple electronic controller on the handlebars. 

Performance was much improved from the beta bikes: the motors went well
beyond the three-month mark, and the batteries, now rated for about 300
charges, could carry the bike as far as 50 km on a charge with minimal
pollution. Joule for joule, electric bikes carry a single driver with
15 to 20 times greater efficiency than that of an average small car. As
a result, a Chinese bike generates just a fraction of the air pollution
and carbon dioxide emitted by a car. "People were very curious," says
Zhang, who recalls extensive media coverage, including a Japanese TV
news report citing Cranes' electric bikes as proof that China was
finally tackling its air pollution problem. The company's three dozen
employees felt like heroes cleaning up the city. "We were very proud of
the product," he says. 

Sales mounted, and Cranes' success attracted competition, bringing both
start-ups and conventional bike manufacturers, such as T & Di
Continental Dove of Nanjing and Shanghai Forever Co., into the market.
Today the China Bicycle Association estimates there are an astounding
800 companies manufacturing electric bikes, many of them local
operations producing a few thousand bikes per year. 

Producing 50,000 bikes a year with a workforce of 210, Cranes is one of
the few businesses that can sustain an R&D operation. But because of
China's weak protection of intellectual property, the innovations made
by companies like Cranes spread quickly, lifting the entire industry.
While Taiwanese competitors complain of patent infringement, Chinese
managers such as Cranes' Zhang take copying of their designs in stride.
More R&D is the only solution, he says, because fighting the smaller
companies and the local governments that protect them is futile. Since
jobs and taxes depend on the prosperity of the patent-infringing firm,
the local authorities always "will find a way to protect this kind of
factory," he says. 

The net result is on display at Shanghai's Crown Bike Shop, the city's
leading outlet for electric bikes. On a chilly Monday morning in
February, customers filter into Crown's storefront in northwestern
Shanghai, its sales floor crammed with shiny new battery-powered bikes
and scooters from a dozen manufacturers. Walking the floor, general
manager Liu Da Wei points to the improvements he has seen since 1997:
geared and usually brushless motors that deliver higher torque,
electronic controllers that have outgrown their reputation for
frighteningly erratic behavior, and lead-acid batteries that deliver a
range of up to 60 km and last up to two years. 

The look of the electric two-wheelers has changed even more. In the
early days, the electric bike looked like, well, an electrified bike,
and flashier renditions of that design are still available at Crown.
But the bigger sellers now are lower, wider models reminiscent of a
Vespa scooter, with a large platform handy for resting feet as well as
packages; minimal pedals (or none at all); and, in some cases, more
powerful batteries and motors that boost the top speed from 20 or 25
km/h to close to 30 km/h. Liu says these electric scooters accounted
for roughly two-thirds of the 6000 EVs Crown sold last year. 

Who is buying Crown's electric bikes and scooters? Liu says it's a
healthy slice of Shanghai society: commuters whose trips have extended
as the city has swelled during the last decade, delivery and
salespeople who crisscross neighborhoods, elderly men and women running
low on pedal power, expectant mothers, and even students (with help
from their families). They all want a faster, easier ride than they get
with a conventional bike. 

Why don't they use Shanghai's extensive bus and subway lines? Liu says
electric bikes beat subways for convenience, buses for speed, and both
when it comes to health concerns: the overcrowded transit system is
feared for its potential to spread disease. Liu says Crown's sales
spiked during the SARS epidemic that emerged in China in the spring of
2003. 

As a rule, disruptive technologies provoke resistance from other market
players and their government supporters. Electric bikes fit that mold.
Automotive and motorcycle manufacturers, transit operators, and
government officials have slowed or stopped the growth of the electric
bike in such major cities as Beijing and Guangzhou. Even the China
Bicycle Association, which purportedly represents bike makers, has
sought to discourage manufacturers from adopting faster scooter
designs. 

Despite the electric-bike industry's decade-long history and commercial
success, it was only last year that China's National People's Congress
amended the national road safety law to officially give electric bikes
a right to use the roads. The legislation legally equated them with
conventional bicycles. Wherever bikes can go, electric bikes can
follow. But the amendments included an important caveat: municipalities
have the final say on whether to give electric bike permits to their
residents, and some have refused to do so. 

IN REJECTING ELECTRIC BIKES, the municipalities cited such concerns as
the threat of pollution from spent lead-acid batteries, interference
with automobiles resulting in accidents or slowed traffic, and the
impact on the viability of public transit systems. Advocates for green
transportation say these arguments amount to thinly veiled attempts to
protect the electric-bicycle industry's competitors. "The real reason
is competition from interest groups," says He Zuoxiu, a renowned
theoretical physicist and academician at the Chinese Academy of
Sciences. 

An outspoken figure in public debates around environmental and energy
policy, He says none of the arguments against electric bikes has merit.
Lead-acid batteries, he points out, are used in cars, too. "The real
pollution source is not the electric bikes, it's the automobiles," he
adds. And he says transit operators and manufacturers should be forced
to compete with the electric bikes by offering more efficient services
and cheaper, cleaner vehicles. The problem, he explains, is that
electric-bike manufacturers are insignificant next to the other
interest groups, particularly the car makers that are attracting
billions of dollars of foreign investment. The automotive industry is
identified as a "pillar industry" in China's official five-year plans. 

Although the odds against them are daunting, electric-bike
manufacturers are pushing back, with surprising success. The mastermind
of one of the most high-profile battles is Ni Jie, president of Luyuan
Electric Vehicle Co., a privately owned manufacturer that has a
pragmatic approach to the market, a sizable R&D effort, and an
ambitious vision for Chinese EV technology. 

Luyuan EV, like Cranes, was a government venture-capital spinoff.
Building from a prototype put together nine years ago by Luyuan's
general manager, Hu Ji Hong, Ni's wife, Luyuan went private after Ni,
Hu, and other principals bought out the initial investors. They have
built a dynamic company that sold 120 000 electric bikes and scooters
last year and expects to sell 300 000 this year [see photo, "Coming Off
the Line"]. 

To find Luyuan EV, you must head off the beaten track to Jinhua, an
industrial metropolis of 1 million people that is tucked into the
unbroken sprawl south of Shanghai that is Zhejiang province. In the
chairman's spacious corner office (one of the few heated rooms at
Luyuan on a cold February day), Ni chain-smokes, sipping from a
seemingly bottomless jar of well-steeped green tea. He says traffic is
the top concern in many Chinese cities, and the electric bicycle fills
a void by offering an affordable alternative to sitting in a stationary
car or bus. "If governments don't have the solution, the people will
behave in their own ways," says Ni. "There's no way to stop that." 

Ni took people power to surprising limits in 2003 when officials in
Fuzhou, the capital of neighboring Fujian province, decided to ban
electric bicycles—shutting off what until then had been one of Luyuan's
best markets. The city not only ceased issuing licenses for electric
bicycles but also seized 20 electric bikes from a bicycle shop in the
summer of 2003. Ni gathered a coalition of 126 electric-bike
manufacturers and filed suit against the city in its own municipal
court. The coalition scored a partial win against the city government,
forcing it to return the seized bikes. 

Far more valuable, says Ni, was the sympathetic coverage they received
from national media and the warning that attention sent to other
municipalities. "What we told other governments is that if they do the
same as Fuzhou, there will be some trouble," he says. 

Conflict over electric bikes isn't limited to the municipalities and
the manufacturers. Even the China Bicycle Ass0ciation has been clashing
with some companies, including Luyuan, over what types of electric
two-wheelers should be on the road [see photo, "The Basic Bike"]. The
bike group enforces a national standard for electric bicycles, and
whichever parameter you choose—weight (no more than 40 kilograms),
width (220 millimeters for the pedal shaft), speed (20 km/h,
maximum)—many of the latest electric scooters either flunk or thwart
the standard. 

Lots of electric scooters, for example, are outfitted with
nonfunctioning pedals and with speed-limiting devices designed for easy
removal after purchase. Luyuan's latest machine doesn't just skirt the
electric-bike standard; it rumbles right over it. Luyuan calls its new
product the LEV, short for light electric vehicle, and Ni openly admits
that it's more than a bicycle. Luyuan's Web site calls it an electric
motorcycle, and that seems fitting: the LEV weighs in at 95 kg; its
48-V, 20-AH battery packs double the energy of the standard bike; and
its 500-watt CPU-controlled motor propels it to 35 km/h. 

The LEV has no official status in China. Nevertheless, on what should
be a slow sales day at a Luyuan retail outlet in downtown Jinhua, the
LEVs are flying out the door. In the space of an hour, one is snapped
up by a 25-year-old man, and a working mother rolls out with another.
Why did she choose an LEV? She drives her rather big-boned son to
school and prefers an LEV to a gas-powered scooter, pointing to the
endemic air pollution hanging over the city. 

Ni is betting that governments will sanction the LEV if it proves
popular. He says he believes that Luyuan has addressed the one concern
municipalities could level against the LEV that might have stuck:
reduced safety due to the cycle's greater weight. The LEV employs an
electric drum brake that, Ni claims, stops it faster than the
cantilever brakes used on garden-variety electric bikes could. A
regenerative braking system is also in the works that would boost
braking power by using the in-hub motor as a generator to pull energy
out of the wheels, extending the vehicle's range by simultaneously
charging the battery. 

Ever the entrepreneur, Ni sees the success of the LEV as a step toward
bigger and better things. He already has his eye on the market for
small delivery vehicles, and he even imagines Luyuan making electric
cars and challenging the major automakers. "They are investing money,
saying we are going to change the gasoline system to electric," he
points out. "But will the big companies really be willing to destroy
their own factories to build the new ones?" In Ni's view, small,
aggressive Chinese companies like Luyuan are more likely to drive the
EV revolution, because they have nothing to lose. 

Wang Feng-he, executive director of the China Bicycle Association, has
little patience for Ni's vision of the EVs' future. Wang says his
association's mandate is to represent the bike industry's interests,
and in his view, vehicles that violate the standard could do damage. He
fears a regulatory backlash if riders of powerful two-wheelers like
LEVs suffer serious injuries in accidents, which would hurt the entire
industry by undermining the electric bicycle's right to the road. "If
the electric bicycle moves toward the motorcycle, we will lose the
ability to be classified as a bicycle," he says. 

Wang is pushing for amendments to the national electric-bike standard
to close its loopholes. But Luyuan and other manufacturers have other
ideas, advocating revisions that would boost the electric bike's top
speed to reflect current consumer demand. At the moment, the debate is
gridlocked, and vehicles such as the LEV keep rolling off assembly
lines and onto China's buzzing, teeming streets. 

THE BIGGEST CHALLENGE facing electric-bike makers may not be municipal
bans, conservative standards, or even technology. It may be the roads.
China is following the development path of Western countries like a
map, rapidly redesigning its cities around the automobile. Across
China, cities are rejecting a mixed-use model and redeveloping along a
strict zoning model, razing residential buildings in center cities to
make way for shiny office towers and paving farmland on the periphery
to create large industrial parks. Displaced from the urban centers,
houses and other residential buildings are springing up in sprawling
suburbs, just as they did in the West decades ago. The automobile is
king in this model, because in the absence of extensive public transit,
cars are the only way to get from distant suburbs to offices and
industry parks. 

To make way for more cars, China's cities are widening their main roads
and building highways. The result has been a rapid increase in
automobile use that, just as it does everywhere else in the world,
almost instantly absorbs the extra roadways. The resulting gridlock has
been especially acute in China's capital. Beijing had 1 million cars in
1997 and was once expected to reach 2 million in 2008. Instead, it hit
2 million last year and now expects 3.5 million to be in use in 2008.
"All over the country, they believe that wider roads are more efficient
for traffic. They're wrong," says Yu Kongjian, an urban planning expert
at Beijing University. 

Car culture is a disaster for the bicycle. Road widening often comes at
the expense of bike lanes, while highways are off-limits to bikes and
nearly impossible to cross. On the smaller roadways, rush-hour traffic
blocks the bike lanes and intersections, prompting outbursts of road
rage from frustrated cyclists. Yu used to cycle 20 to 30 minutes
between work and home, but he now drives—a 10- to 60-minute trip,
depending on the traffic. "It's too dangerous to bike, so people give
up. I gave up," he says. 

Yu is confident that, in the long run, it is the gas guzzlers that will
be forced to give way. One reason is gridlock. Another is China's
endemic urban pollution [see photo, "Pea Soup"]. On all but the best
days in Jinhua, for example, the city skyline disappears behind a dense
haze of smog and particulates; more and more of that atmospheric soup
is pouring out of tailpipes. 

It's the strategic cost of petroleum that inspires professor He's
confidence in the electric bike. China's oil imports are on the same
exponential growth path as its car fleet. China has eclipsed Japan as
the second-biggest importer of oil, bringing it into direct competition
with the world's leading consumer of petroleum: the United States. With
import dependence and environmental burdens in mind, China has
promulgated fuel-efficiency standards that are stricter in principle
than those currently in force in the United States, and it is
considering imposition of a 20 to 50 percent national tax on retail
gasoline and diesel. 

IF CHINA CAN FIND A WAY to make relatively efficient electric bikes a
significant part of its transportation system, it could have major
repercussions elsewhere in the developing—and developed—world. That
includes the United States, which has the world's most car-dependent
culture. Unlike Japan and Europe, where bicycles, trains, and other
forms of transportation still thrive, the United States is one of the
few places where people move almost exclusively by car. As WaveCrest's
Benjamin puts it, "We live in a bubble." 

That bubble has been unkind to electric-bike promoters like Benjamin.
The big roads and vast distances that many Americans navigate are a
hindrance—so much so that they have altered the way people perceive the
bicycle. Electric-bike consultant Jamerson says that to most U.S.
drivers, a bicyclist on the road is just a nuisance. And to most
bicyclists and bike dealers, the bike is an exercise machine or a toy.
Why would they want one with an electric motor? 

Still, there are some hopeful signs. Some U.S. cities are installing
bike lanes and paths in a bid to woo drivers to bicycles. And at U.S.
specialty vehicle shops, electric bikes are increasingly available,
including bikes from Cranes and other Chinese producers. In Canada,
Luyuan distributors recently secured changes to the Motor Vehicle
Safety Act to allow electric bikes traveling at less than 32 km/h to
use the road without license or insurance. 

Another promising sign is that U.S. and European technology developers
are increasingly offering high-end bikes in a bid to redefine motorized
bikes as muscular machines. WaveCrest's snappy TidalForce bikes have
electronically modulated motors that supply an incredible 90 newton
meters of torque (compared with 10 for the average Chinese bike's
motor). 

Meanwhile, Vectrix Corp. of Newport, R.I., says it will soon introduce
an electric motorcycle that will put the LEV to shame. According to
Vectrix, the vehicle will sell for about $8000, cruise to 100 km/h, and
have a range of more than 110 km. It will require a motorcycle license,
at least in the United States. 

Benjamin says these are early days for the electric bike—the equivalent
of 1903 or 1904 for the auto industry, when people still doubted that
cars would replace the horse and buggy. Eventually, he says, the
electric bike will have its day in the West, thanks to the same forces
cited by professors Yu and He. In fact, in Benjamin's view, the
transition has already begun: "I tell people that the human race is
going to buy a hell of a lot of two-wheeled electric vehicles, and they
ask, 'When is it going to happen?' Well, it's happening right now in
China." 
------------------------------------------------------------------------PETER
FAIRLEY writes about energy, technology, and the environment from
Victoria, B.C., Canada. 


        

        
                
__________________________________________________________ 
Find your next car at http://autos.yahoo.ca

--- End Message ---
--- Begin Message --- The drop will not only vary with sag on the mains, but varies significantly depending on how much resistance is in the extension cord or whatever wires you to the breaker.

There are ways to do this. Inductive/Hall effect pickups and current transformers are the main ones. Resistive shunts don't really get used primarily due to isolation issues.

Danny

Lee Hart wrote:

acid_lead wrote:
For EV opportunity charging, you still don't know what other loads are
on the breaker, and that could change after you set something manually.

If a circuit becomes overloaded, does the voltage drop measurably
prior to the breaker opening? What would it take to sense that?

Well, it drops -- but from one unknown voltage to another unknown
voltage. And the drops due to load current are too small and too
unpredictable to be used to estimate load current.

For example, a "120vac" outlet might actually vary from 115-125v
depending on time of day and other factors. It might also sag 2 volts
from no-load to max-load current. So if it measures 118v, you can't tell
if that's because it's supplying its full load current, or it's just a
hot summer day and all the AC outlets are low in voltage.
--
The two most common elements in the universe are hydrogen and stupidity.
        -- Harlan Ellison
--
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net

--- End Message ---

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