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  1. Old Comment

    2007 EV Motor Controller Round-Up

    http://www.btmon.com/Video/Unsorted/..._08_06.torrent

    Found Bit Torrent link for Curtis 1314 Control software
    Posted 03-15-2010 at 10:45 AM by billbobagns billbobagns is offline
  2. Old Comment

    How Will Toshiba's SCiB Battery Technology Impact EVs?

    I would like to give my spin on rbgrn's original post that start this thread. Using his Tesla numbers of 4.7 miles/kWh. Let's make a SCiB battery pack that goes 150 miles on a full charge, or 150 * .9 = 135 miles on a 90% charge. That would require 28.73 kWh of energy and give us 2 hours of 70 mph (highway) driving, which is the type of driving you'll be doing in order to really need rapid recharging. In a family of five, someone needs to use the restroom after two hours, so a five plus minute stop every two hours is not a big deal. 28.73 kWh / (5 min/60 min/hr) = 344.76 kW of power over a five minute time period will give us the necessary juice. At 480v, which level 3 recharging is that means we need 344,760 watts / 480v = 718.25 amps. Here's the kicker. Level 3 is not just 480v, it is three phase: (http://planet.betterplace.com/profiles/blogs/electric-charging-stations). That's just one reference, there are plenty of others stating the same fact. Therefore, we get to divide or required amperage requirement into three separate streams of electrons requiring 718.25 / 3 = 240 amps (Rounded up). Based on several sources Wikipedia seems conservative in the AWG ratings: http://en.wikipedia.org/wiki/American_wire_gauge but given that a 5/0 AWG wire of 0.5165 inches per phase should do the trick. The closest cable I could find is a 4/0 AWG five conductor cable (three power, one neutral, one ground) at http://www.ramcorpwire.com/products.php?catname=Type%20W%20Portable%20Cables& cat=38&pg=5 and the whole cable is 2.55 inches in diameter. Just guessing that 5/0 is thicker than 4/0 by a factor 1.12 for the bare copper I simply factored that toward the whole cable and came up with a single 2.86 inch thick cable that would connect to your car. Several companies show pictures of level 3 chargers with much smaller cables, but they do not specify the amperage they can provide: http://www.avinc.com/media_gallery/images/ev_charging/ Elimination of 1 conductor for the 4/0 cable brings us down to an outer diameter of 2.18 inches or for 5/0 maybe about 2.45 inches.
    For the infrastructure issue, you only need these kind of stations on the interstates. And there you can close by produce the energy for wind, solar, geothermal, etc. With single industrial wind turbines being rated at 1.5-5 MW and solar, depending on the type crystalline, thin-film, or thermal: http://solarbythewatt.com/2009/03/09/solar-energy-land-area-efficiency-or-how-much-acres-per-mw-kwp-per-acre/ only requires 4.5-13.5 acres per MW. Add in a battery backup and you have a several MW microgrid: http://www.altairnano.com/profiles/investor/fullpage.asp?f=1&BzID=546&to=cp&Nav=0&LangID=1&s=0 &ID=11304 capable of providing power to a multi-pump electric gas station. Where it is possible this microgrid could even be tied into the tradtional grid for greater reliability. This is the future.
    Posted 02-03-2010 at 11:14 AM by kabalah70 kabalah70 is offline
  3. Old Comment

    EVs welcome at ReFuel on Laguna Seca Raceway

    I heard Steve Patmont would be bringing his Shocker electric motorcycle prototype. Anyone else?
    Posted 07-12-2009 at 08:12 AM by drivin98 drivin98 is offline
  4. Old Comment

    EVs welcome at ReFuel on Laguna Seca Raceway

    What fantastic news! Thank you very much for sharing this info. Back in the late 1970's I use to race my Datsun 240Z at Laguna Seca (Mazda Speedway) and at Sears Point - now Infineon Raceway. I've got the date marked to attend the event.

    Anyone else going to attend?

    Ernie
    Posted 06-17-2009 at 09:18 AM by Alchemist Alchemist is offline
  5. Old Comment
    Posted 05-22-2009 at 02:48 AM by kurtdaniel1 kurtdaniel1 is offline
  6. Old Comment
    Posted 05-20-2009 at 01:51 AM by j_rossdale j_rossdale is offline
    Updated 05-20-2009 at 02:08 AM by j_rossdale
  7. Old Comment

    Featured EV Video: Craig Dusing's Chevy S-10

    that was a very nice video,,i really love how that truck works after the conversion. i wanna do it with my car..
    Posted 04-23-2009 at 12:32 AM by j_rossdale j_rossdale is offline
    Updated 05-08-2009 at 05:07 AM by j_rossdale
  8. Old Comment

    Six Major Pre-Production Electric Vehicles Compared

    from the six, i like the aptera the most,,
    Posted 04-23-2009 at 12:22 AM by j_rossdale j_rossdale is offline
    Updated 05-19-2009 at 01:34 AM by j_rossdale
  9. Old Comment

    Six Major Pre-Production Electric Vehicles Compared

    Don't forget
    The Triac from San Jose
    Posted 04-11-2009 at 06:23 PM by davejavu davejavu is offline
  10. Old Comment

    200AH LiFePo4 Battery Test Results

    Hi, following on from david85's comment above - with regards to smaller LiFePO4 packs, I have had two orders from Optimum Batteries (http://www.optimum-china.com/) of 36V 15Ah and 36V 10Ah packs which i can't fault - manufacturing was very tidy (pulled one apart to have a closer look), i have had no problems with any of the packs (16 in total) and found Optimum to be very professional and obliging. I use the packs for electric skateboards - doubles the range compared to the original SLA packs and delivers great performance. The built in BMS on the packs deliver up to a constant 45Amps with no discernible drop off in performance until flat....Hope that helps, Cheers Nigel
    Posted 03-29-2009 at 01:36 AM by kiwi_nigel kiwi_nigel is offline
  11. Old Comment
    PureSilver's Avatar

    Making Electric Vehicles Work for American Families

    This couldn't be more true; my parents plus my siblings equal a family of five; sadly, our separate lifestyles mean three separate cars. However, the facts are these; as a family we don't travel far together almost ever, and for that an load-lugging we can keep the Volvo. The rest of the time an EV would suffice AND avoid congestion charges...
    Posted 02-13-2009 at 09:21 AM by PureSilver PureSilver is offline
  12. Old Comment

    How Will Toshiba's SCiB Battery Technology Impact EVs?

    OK, I am new here, but I think you just miss one very important point with the quick recharge option - that is regenerative braking (RB).

    At the moment really effective RB systems (like KERS in Formula 1) use super-capacitors.

    The limit to use it in normal battery hybrid cars was the current generated by the braking motor, that normal batteries couldn't cope with.

    If you take into consideration an in-wheel motor being able to deliver 1000 A in full braking (generator) mode, you will actually seldom need any normal brakes.
    Also in stop and go commuter traffic you will have seldom to recharge.
    Posted 02-07-2009 at 05:29 AM by gyronut gyronut is offline
    Updated 02-07-2009 at 05:32 AM by gyronut
  13. Old Comment
    rbgrn's Avatar

    Featured EV Video: Living with an EV part 4

    So Gav is married to a tripod now?

    I thought the comparison was "interesting" just because of the massive size difference. They have nearly identical ratings but the Kelly controller is 1/3 the size. I've heard of that curtis controller overheating if not mounted to a large, heat-dissipating plate but does the Kelly have any heat problems?
    Posted 12-07-2008 at 09:43 AM by rbgrn rbgrn is offline
  14. Old Comment
    rbgrn's Avatar

    200AH LiFePo4 Battery Test Results

    Good to know.

    Thanks again for all your work!
    Posted 11-05-2008 at 01:51 PM by rbgrn rbgrn is offline
  15. Old Comment
    rbgrn's Avatar

    Featured EV Video: Craig Dusing's Chevy S-10

    I'd love to do more of these because I think they are a really great way to educate the general public on the existing options. PM me if you are drivable distance from Chicago and would like to do a video. Another option is that you could also film it yourself and I can edit and publish it.
    Posted 09-21-2008 at 05:45 PM by rbgrn rbgrn is offline
  16. Old Comment
    Posted 09-02-2008 at 03:54 PM by rbgrn rbgrn is offline
  17. Old Comment
    rbgrn's Avatar

    Barak Obama or John McCain - Which Candidate will Revive the Electric Car?

    freaking amazingly socially conservative, that is.

    Girl wants to drop evolution entirely and teach only creationism in schools. Nice.

    "See, you women are only part of a man. You came from a rib."

    Can't wait to see what kind of geniuses would be raised out of that generation.
    Posted 09-02-2008 at 09:24 AM by rbgrn rbgrn is offline
  18. Old Comment
    rbgrn's Avatar

    DIY Electric Car Highlights and Progress

    Very good summary of the recent activity. Thanks, Matt!
    Posted 08-28-2008 at 05:02 PM by rbgrn rbgrn is offline
  19. Old Comment
    rbgrn's Avatar

    Barak Obama or John McCain - Which Candidate will Revive the Electric Car?

    I like the point about the $300m battery prize. I think it's a very good thing but also don't want to obscure the fact that there are batteries today that will work well for a basic EV.

    Also - awesome photos!
    Posted 07-30-2008 at 07:50 AM by rbgrn rbgrn is offline
  20. Old Comment
    rbgrn's Avatar

    Green Cars Part 3- Hydrogen

    +1 for EVs and -1 for H-Cars on the official scorecard
    Posted 06-19-2008 at 07:47 PM by rbgrn rbgrn is offline
 
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