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You can reach the person managing the list at [EMAIL PROTECTED] When replying, please edit your Subject line so it is more specific than "Re: Contents of EV digest..." Today's Topics: 1. Re: Silent vehicles, was Re: Sensors at drive throughs (ampaynz1) 2. Re: Silent vehicles, was Re: Sensors at drive throughs (joe) 3. Re: Inventor says electric van can go 500 miles after 8 hour charge (Lawrence Rhodes) 4. Re: the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery. (Dmitri) 5. Re: Silent vehicles, was Re: Sensors at drive throughs (Marty Hewes) 6. Re: Open source controller design (Thomas Ward) 7. Coming "soon"? (Willie McKemie) 8. Re: Silent vehicles, was Re: Sensors at drive throughs (Hunter Cook) 9. Back to the Future - Jay Leno's Electric Tin Lizzy (S Collins) 10. Re: Silent vehicles, was Re: Sensors at drive throughs (Lee Hart) 11. KillaCycle Team on the USA Biker Nation radio show, Tomorrow! (Bill Dube) 12. Re: Silent vehicles, was Re: Sensors at drive throughs ([EMAIL PROTECTED]) 13. Re: Silent vehicles, was Re: Sensors at drive throughs (Bob Rice) 14. Re: LED driver that runs off of 12V (Lee Hart) 15. Re: Silent vehicles, was Re: Sensors at drive throughs (Bob Rice) 16. Re: Silent vehicles, was Re: Sensors at drive throughs (Bob Rice) 17. Re: KillaCycle Team on the USA Biker Nation radio show, Tomorrow! (Bill Dube) 18. Re: Open source controller design (Morgan LaMoore) 19. Re: the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery. (Morgan LaMoore) 20. Re: Overdiven 10hp AC (Morgan LaMoore) 21. Silent Vehicles Let's get REAL (Steven Lough) 22. KillaCycle on NBC Today Show Tomorrow, Saturday, Oct 5th (Bill Dube) 23. Re: LED driver that runs off of 12V (damon henry) 24. Re: LED driver that runs off of 12V (Tim Humphrey) 25. Re: Another EV in the News (Lock Hughes) 26. Re: Another EV in the News (Ben) 27. Re: LED driver that runs off of 12V (storm connors) 28. Re: Another EV in the News (Ben) 29. Re: KillaCycle on NBC Today Show Tomorrow, Saturday, Oct 5th (MIKE WILLMON) 30. Re: Open source controller design (storm connors) ---------------------------------------------------------------------- Message: 1 Date: Fri, 5 Oct 2007 07:13:09 -0700 (PDT) From: ampaynz1 <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: ev@lists.sjsu.edu Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii Instead of making EV's quieter, the blind should wear a belt that senses all objects around them in a circle and gives off a beep when it detects a moving object. They can carry a backpack that houses their batteries or maybe the batteries to power the device can be put in the cane they use. gowen wrote: > > [EMAIL PROTECTED] wrote: >> I've seen some discussion as to whether electric / hybrid cars need >> some form of noise-maker for urban environments where pedestrians are >> used to being able to hear traffic, including the visually impaired. >> >> > -- View this message in context: http://www.nabble.com/Sensors-at-drive-throughs-tf4552806s25542.html#a13060239 Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ------------------------------ Message: 2 Date: Fri, 5 Oct 2007 07:13:35 -0700 From: "joe" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original No pedestrians allowed - although I have seen a couple lately hitchhiking! Joseph H. Strubhar Web: www.gremcoinc.com E-mail: [EMAIL PROTECTED] ----- Original Message ----- From: "Hunter Cook" <[EMAIL PROTECTED]> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Sent: Thursday, October 04, 2007 8:52 PM Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs >> But since the blind (with a white cane) have >> right-of-way everywhere I can think of > > Interstate Highways. > > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.488 / Virus Database: 269.13.39/1044 - Release Date: > 10/2/2007 11:10 AM > > ------------------------------ Message: 3 Date: Fri, 5 Oct 2007 07:22:20 -0700 From: "Lawrence Rhodes" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Inventor says electric van can go 500 miles after 8 hour charge To: <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1" Did anyone go to Ozark speedway to see the test? Maybe they had bearing trouble. Lawrence Rhodes........ > Message: 33 > Date: Thu, 4 Oct 2007 17:08:30 -0700 (PDT) > From: [EMAIL PROTECTED] > Subject: [EVDL] Inventor says electric van can go 500 miles after > 8-hour charge > To: ev@lists.sjsu.edu, [EMAIL PROTECTED] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=us-ascii > > > > *Please note, the sender's email address has not been verified. > > > > Electric Caravan video > > > > > ******************** > > If you are having trouble with any of the links in this message, or if the URL's are not appearing as links, please follow the instructions at the bottom of this email. > > Title: Inventor says electric van can go 500 miles after 8-hour charge > > > Copy and paste the following into your Web browser to access the sent link: > http://www.emailthis.clickability.com/et/emailThis?clickMap=viewThis&etMailToID=1016389476&pt=Y > > > > > Copy and paste the following into your Web browser to SAVE THIS link: > http://www.savethis.clickability.com/st/saveThisPopupApp?clickMap=saveFromET&partnerID=230707&etMailToID=1016389476&pt=Y > > > Copy and paste the following into your Web browser to forward this link: > http://www.emailthis.clickability.com/et/emailThis?clickMap=forward&etMailToID=1016389476&partnerID=230707&pt=Y > > > > ******************** > > > Email pages from any Web site you visit - add the EMAIL THIS button to your browser, copy and paste the following into your Web browser: > http://www.emailthis.clickability.com/et/emailThis?clickMap=browserButtons&pt=Y" ------------------------------ Message: 4 Date: Fri, 5 Oct 2007 10:43:56 -0400 From: "Dmitri" <[EMAIL PROTECTED]> Subject: Re: [EVDL] the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery. To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="Windows-1252"; reply-type=original I think they mean Lithium Iron Phosphate, which is the hottest battery so far for EVs (Thunder Sky, A123) ----- Original Message ----- From: "Geopilot" <[EMAIL PROTECTED]> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Sent: Friday, October 05, 2007 2:43 AM Subject: [EVDL] the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery. I noticed this in the description of the new one laptop per child product. anyone know about this battery ? what are it's capabilities for a car? "In the places where the XO will be used, power is often scarce. So the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery." _______________________________________________ For subscription options, see http://lists.sjsu.edu/mailman/listinfo/ev ------------------------------ Message: 5 Date: Fri, 5 Oct 2007 09:52:54 -0500 From: "Marty Hewes" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original I've seen a lot of backup sensors in newer car rear bumpers. Anybody know the range and field of view on something like that? Maybe turn on a noise maker if something is detected in front? Isn't Volvo or somebody advertising a collision warning system that might be used to turn on noise? We wouldn't have to listen to the noise all the time. Marty ----- Original Message ----- From: "ampaynz1" <[EMAIL PROTECTED]> To: <ev@lists.sjsu.edu> Sent: Friday, October 05, 2007 9:13 AM Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > > Instead of making EV's quieter, the blind should wear a belt that senses > all > objects around them in a circle and gives off a beep when it detects a > moving object. They can carry a backpack that houses their batteries or > maybe the batteries to power the device can be put in the cane they use. > > > > gowen wrote: >> >> [EMAIL PROTECTED] wrote: >>> I've seen some discussion as to whether electric / hybrid cars need >>> some form of noise-maker for urban environments where pedestrians are >>> used to being able to hear traffic, including the visually impaired. >>> >>> >> > > -- > View this message in context: > http://www.nabble.com/Sensors-at-drive-throughs-tf4552806s25542.html#a13060239 > Sent from the Electric Vehicle Discussion List mailing list archive at > Nabble.com. > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > ------------------------------ Message: 6 Date: Fri, 05 Oct 2007 16:07:15 +0100 From: Thomas Ward <[EMAIL PROTECTED]> Subject: Re: [EVDL] Open source controller design To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Dan, 1. in all the circuits diagrams I have seen the line from the MCU PWM pin to the IGBT driver has a pullup resistor to the 5v rail, an inline resistor and a couple of caps to ground. (I am no expert so check this with someone who is) 2. is there any reason your not using a single high amp IGBT with something like Cornell Dubilier SCD capacitors? Looks easier to fabricate to me. Dan Frederiksen wrote: > some modest progress to report > > a basic core prototype circuit has been fleshed out: > www.zev.dk/diagram3.gif > the 3 components in the power section are shown as one each but in > practice several would be in parallel. I'm planning to try 6 IGBTs to > begin with. same with the diodes and maybe 10 of the caps. if the number > gets big the power supply and driver may need to be increased as well. > > it's still missing a current sensor component I have bought as well as a > thermistor input. they should be trivial to add. > some tachometer will probably be needed too but that can perhaps be > omitted for early versions. > > some of you with EE experience can comment if you see something terribly > wrong. maybe even Otmar if he isn't too scared :) > > some future considerations are inductors and shielding to protect the > low voltage section from the shocks of the HV section. > also maybe an extra connector for B+ with a resistor for the intial > charging when connecting the battery wires to avoid sparking. hold the > positive lead on that for a few seconds before connecting to B+ > > Dan > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > ------------------------------ Message: 7 Date: Fri, 5 Oct 2007 09:42:28 -0500 From: Willie McKemie <[EMAIL PROTECTED]> Subject: [EVDL] Coming "soon"? To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii http://tinyurl.com/2onsqq EnerDel to road test their Lion battery pack in a HEV in December. I have some ENEI stock, so I watch them closely. -- Willie, ONWARD! Through the fog! http://counter.li.org Linux registered user #228836 since 1995 Debian3.1/GNU/Linux system uptime 123 days 10 hours 06 minutes ------------------------------ Message: 8 Date: Fri, 05 Oct 2007 10:14:14 -0500 From: Hunter Cook <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain > I always drive with the headlights on, in my EVs. Not to avoid > running people or animals over (I've never had a problem with that, > touch wood) - but for general visibility in traffic. Same thing I do in my ICE car. I'll do it in the EV as well once I've got a pack that'll let me press the not-gas without dimming them. Isn't the whole world going over to daytime running lights for just this reason? It's been years since you could buy a motorcycle that didn't turn the headlight on automatically with the key... ------------------------------ Message: 9 Date: Fri, 5 Oct 2007 08:33:02 -0700 (PDT) From: S Collins <[EMAIL PROTECTED]> Subject: [EVDL] Back to the Future - Jay Leno's Electric Tin Lizzy To: ev@lists.sjsu.edu Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=iso-8859-1 http://www.nytimes.com/2007/08/05/automobiles/05BAKER.html?_r=1&oref=slogin Washable batteries? Talk about direct desulphation... Scott ____________________________________________________________________________________ Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ------------------------------ Message: 10 Date: Fri, 05 Oct 2007 10:46:29 -0500 From: Lee Hart <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: [EMAIL PROTECTED], Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed GWMobile wrote: > I just saw a video on meracafe that showed a guy with a scooter who put > two neodymiam magent on the bottom of his scooter so it would trigger > the road loops and turn on the green light. > > His scooter was too small to trigger them because there wasn't enough > metal in it to change the loop inductance. > > Those super magnets though acted like a huge hunk of metal when changing > the inductance of the loop and triggered the light! That wouldn't work for the inductive loop type of sensors. I think this is actually the most common type. But from an individual's point of view, all that matters is to find a solution for the particular traffic lights that are giving him a problem. Maybe the magnets worked for the light near his home. -- Ring the bells that still can ring Forget the perfect offering There is a crack in everything That's how the light gets in -- Leonard Cohen -- Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net ------------------------------ Message: 11 Date: Fri, 05 Oct 2007 10:03:38 -0600 From: Bill Dube <[EMAIL PROTECTED]> Subject: [EVDL] KillaCycle Team on the USA Biker Nation radio show, Tomorrow! To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="us-ascii"; format=flowed The KillaCycle Team will be talking with Peter Boyles on the <http://www.usabikernation.com/>USA Biker Nation radio show on Saturday morning Oct 5th, at about 9 AM MST. You can hear the webcast at <http://www.usabikernation.com/fabrication.asp>http://www.usabikernation.com/fabrication.asp or tune in in the Denver metro area at 760 AM. http://www.usabikernation.com/ http://www.usabikernation.com/fabrication.asp Bill Dube' ------------------------------ Message: 12 Date: Fri, 05 Oct 2007 12:13:45 -0400 From: [EMAIL PROTECTED] Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Marty Hewes wrote: > I've seen a lot of backup sensors in newer car rear bumpers. > Anybody know the range and field of view on something like that? http://www.bak-talk.com/specifications.htm DETECTING RANGE: 12 inches to 8 feet DETECTING ANGLES: HORIZONTAL: 30 degrees VERTICAL: 50 degrees http://www.obstaclesensor.com/?gclid=CNT08_WG-I4CFRGCGgodOD5gDQ http://lib.store.yahoo.net/lib/sports-imports/spal.pdf DETECTING RANGE: 5 feet DETECTING ANGLES: HORIZONTAL: 120 degrees VERTICAL: 60 degrees (more available through Google...) Cost seems to run around $100-$200. ------------------------------ Message: 13 Date: Fri, 5 Oct 2007 12:20:03 -0400 From: "Bob Rice" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original ----- Original Message ----- From: "Marty Hewes" <[EMAIL PROTECTED]> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Sent: Friday, October 05, 2007 10:52 AM Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > I've seen a lot of backup sensors in newer car rear bumpers. Anybody know > the range and field of view on something like that? Maybe turn on a noise > maker if something is detected in front? Isn't Volvo or somebody > advertising a collision warning system that might be used to turn on > noise? > We wouldn't have to listen to the noise all the time. > > Marty > > ----- Original Message ----- > From: "ampaynz1" <[EMAIL PROTECTED]> > To: <ev@lists.sjsu.edu> > Sent: Friday, October 05, 2007 9:13 AM > Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > > >> >> Instead of making EV's quieter, the blind should wear a belt that senses >> all >> objects around them in a circle and gives off a beep when it detects a >> moving object. They can carry a backpack that houses their batteries or >> maybe the batteries to power the device can be put in the cane they use. >> Hi EVerybody; You mean they are just LOOSE ? Without a handler? A dog, a person? Seems like this is more the issue than noisy vehicles?Gees! It's bad enough with the dummy SIGHTED people running loose out there. After all Darwin's law is out of political favour, nowadaze, anyhow. I saw enouigh of that in my train driving daze! Of course a locomotive comes with a VERY loud horn and ,contrary to popular belief, NO steering wheel! On the other end of the vehicle spectrem, I have hit enough dunny pedestrians riding a silent pedal bike in NYC. In the bike lane knocked them down when they pop out, not looking, from behind trucks. Boy are they Pissed! Almost as much as I am. Being 6'5" and 300 lbs ,they usually go away!" Now don't get me MAD! " I say, usually works. That there are so FEW pedestrians killed in NYC is remarkable to me. Other cities this is an issue too. The Portland Max, lite rail trains stack 'em up, too. Best method they use is the two train trick;( TWO trains operating in Portland that day??!! Duh!) gets them EVery time. Walk around the back of a departing train, ANOTHER train coming the other way. Remember they are electric, almost silent. BAM! another 2 hour delay picking up body parts! Ruins the train drivers' day, too. Nobody thinks of that. Maybe Tri-Met should look into those "Scoop" afairs that they had 100 years ago on the trolleys, that basketlike thing fitted to the front of the cars. A light sorta "fence"thing hung out front. A body would push that back, tripping a bedframe like scoop that would sweep you up BEFORE you went under the wheels! Simple 19th century technology! I have scene many versions of this on our Museum Trolleys Gotta agree with David R. NUTS! I like it ,well said! Modern life is noisy enough! We NEED more noise? Hell no! One of the most annoying noises, on the planet is those godamn backup beepers on trux and busses!A lite tap on the horn should do it. Remember YOU are driving the two tons of Led Sled electric? If you are going slow you will gently nudge them back to reaity? If your RADIO is on fairly loud? Maybe they will hear Your classical tunes? " Ride of the Valkries" William Tell Overture<g>!"Or, for you cat fans an amplified "MEOW" Like the ones ya get when you step on the cat's foot<g>! Saw ya Bob ------------------------------ Message: 14 Date: Fri, 05 Oct 2007 11:26:22 -0500 From: Lee Hart <[EMAIL PROTECTED]> Subject: Re: [EVDL] LED driver that runs off of 12V To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Jeff Shanab wrote: > How about something like a Hartley style oscillator... Sure; that will work. In fact, there are of course dozens of circuits that can do the job. I was trying to point out that you don't pick the circuit first, and then warp the application so you can use it. (We're building a toaster. OK, let's pick the microcomputer and operating system...) Most of the "design idea" circuits found in electronics magazines like this one are written by the marketing department of an IC manufacturer to sell their chips. The right way to do it is to figure out what performance you need FIRST, and THEN find the best circuit to to it. I tell the kids in my BEST class, "The first solution is the worst solution." It's the one you arrived at without thinking; by doing whatever seems easy or expedient or fashionable at the moment. But take some time to *think* about the problem. How *many* ways can you find to solve it? Often, your second or third or fourth ideas turn out to be better choices! If you think about a problem long enough, you will frequently arrive at a "best" solution; one that is so obviously right that once you've found it, you'll slap yourself on the forehead and say, "Of course! That's it!" -- Ring the bells that still can ring Forget the perfect offering There is a crack in everything That's how the light gets in -- Leonard Cohen -- Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net ------------------------------ Message: 15 Date: Fri, 5 Oct 2007 12:23:16 -0400 From: "Bob Rice" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original ----- Original Message ----- From: "joe" <[EMAIL PROTECTED]> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Sent: Friday, October 05, 2007 10:13 AM Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > No pedestrians allowed - although I have seen a couple lately hitchhiking! > > Joseph H. Strubhar > > Web: www.gremcoinc.com > > E-mail: [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Hunter Cook" <[EMAIL PROTECTED]> > To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> > Sent: Thursday, October 04, 2007 8:52 PM > Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > > >>> But since the blind (with a white cane) have >>> right-of-way everywhere I can think of >> >> Interstate Highways. Railroad trax! >> >> _______________________________________________ >> For subscription options, see >> http://lists.sjsu.edu/mailman/listinfo/ev >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.5.488 / Virus Database: 269.13.39/1044 - Release Date: >> 10/2/2007 11:10 AM >> >> > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev ------------------------------ Message: 16 Date: Fri, 5 Oct 2007 12:24:44 -0400 From: "Bob Rice" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original ----- Original Message ----- From: "joe" <[EMAIL PROTECTED]> To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Sent: Friday, October 05, 2007 10:13 AM Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > No pedestrians allowed - although I have seen a couple lately hitchhiking! Hitchhiking? Wow! THAT'S something from the past! In my last few transcon runs never saw any. Bob > Joseph H. Strubhar > > Web: www.gremcoinc.com > > E-mail: [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Hunter Cook" <[EMAIL PROTECTED]> > To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> > Sent: Thursday, October 04, 2007 8:52 PM > Subject: Re: [EVDL] Silent vehicles, was Re: Sensors at drive throughs > > >>> But since the blind (with a white cane) have >>> right-of-way everywhere I can think of >> >> Interstate Highways. >> >> >> _______________________________________________ >> For subscription options, see >> http://lists.sjsu.edu/mailman/listinfo/ev >> >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.5.488 / Virus Database: 269.13.39/1044 - Release Date: >> 10/2/2007 11:10 AM >> >> > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > > > -- > Internal Virus Database is out-of-date. > Checked by AVG Free Edition. > Version: 7.5.488 / Virus Database: 269.13.28/1023 - Release Date: > 9/22/2007 1:27 PM > > ------------------------------ Message: 17 Date: Fri, 05 Oct 2007 10:24:51 -0600 From: Bill Dube <[EMAIL PROTECTED]> Subject: Re: [EVDL] KillaCycle Team on the USA Biker Nation radio show, Tomorrow! To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="us-ascii"; format=flowed Oops. Saturday is October 6th, not the 5th. Bill D. At 10:03 AM 10/5/2007, you wrote: >The KillaCycle Team will be talking with Peter Boyles on the ><http://www.usabikernation.com/>USA Biker Nation radio show on >Saturday morning Oct 5th, at about 9 AM MST. You can hear the webcast >at ><http://www.usabikernation.com/fabrication.asp>http://www.usabikernation.com/fabrication.asp > > >or tune in in the Denver metro area at 760 AM. > >http://www.usabikernation.com/ >http://www.usabikernation.com/fabrication.asp > >Bill Dube' > > >_______________________________________________ >For subscription options, see >http://lists.sjsu.edu/mailman/listinfo/ev ------------------------------ Message: 18 Date: Fri, 5 Oct 2007 11:42:01 -0500 From: "Morgan LaMoore" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Open source controller design To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 > 1. > in all the circuits diagrams I have seen the line from the MCU PWM pin > to the IGBT driver has a pullup resistor to the 5v rail, an inline > resistor and a couple of caps to ground. (I am no expert so check this > with someone who is) Good idea - all of that may be a bit much, but a pull-up is definitely necessary, and some filtering is probably a good idea. > 2. > is there any reason your not using a single high amp IGBT with something > like Cornell Dubilier SCD capacitors? > > Looks easier to fabricate to me. It also costs a lot more. A 400A IGBT can easily cost hundreds of dollars, or you can use a bunch of small IGBTs for much cheaper. -Morgan LaMoore ------------------------------ Message: 19 Date: Fri, 5 Oct 2007 11:53:52 -0500 From: "Morgan LaMoore" <[EMAIL PROTECTED]> Subject: Re: [EVDL] the laptop uses a new battery chemistry, called lithium ferro-phosphate. It runs at one-tenth the temperature of a standard laptop battery, costs $10 to replace, and is good for 2,000 charges ? versus 500 on a regular laptop battery. To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 On 10/5/07, Dmitri <[EMAIL PROTECTED]> wrote: > I think they mean Lithium Iron Phosphate, which is the hottest battery so > far for EVs (Thunder Sky, A123) Ferro-phosphate *is* iron phosphate. To be more precise, it's ferric phosphate. Ferrum is the Latin word for iron; ferric is Fe3+. Phosphate is PO4 and has a charge of -3, so Fe3+ bonds to it to make FePO4, ferric phosphate. Since ferric can change to ferrous if it had a different charge, if the person didn't know the chemistry involved or the charge on the atoms, they could just say ferro phosphate. -Morgan LaMoore ------------------------------ Message: 20 Date: Fri, 5 Oct 2007 12:11:49 -0500 From: "Morgan LaMoore" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Overdiven 10hp AC To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 It sounds like you're both saying the same thing! Jeff Shanab <[EMAIL PROTECTED]> wrote: > > Now either I configure the motor for less torque and > > higher rpm and gear > > it down more or I configure for twice that torque at > > 1/2 the rpm @ the > > same frequency. Jeff Major <[EMAIL PROTECTED]> wrote: > So, after you change your 4 pole motor to 12 poles, > nothing will be gained. Yes, you will have altered > the speed frequency relationship. But your premise, > as I understood it, was that the exercise would result > in a higher power for a given motor mass. This is not > the case. The number of poles/windings is just a tradeoff between speed and torque; it seems like you're both saying that. For the same size, you get the same power, whether with low torque at high RPMs or high torque at low RPMs. -Morgan LaMoore ------------------------------ Message: 21 Date: Fri, 05 Oct 2007 10:07:14 -0700 From: Steven Lough <[EMAIL PROTECTED]> Subject: [EVDL] Silent Vehicles Let's get REAL To: Electric Vehicle Discussion List RCVR <[EMAIL PROTECTED]> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii; format=flowed Can't believe how this story has such "legs" as they say.. It made it to every TV station in Seattle. I have tried to reply to every BLOG where this article has popped up, with the following comments: Let's be real here. A Lexus, or a Cadilac, or even a new Toyota Yarus, or any new car with a functioning exhaust system, is just as quiet as a Hybrid, turning a corner, or moving round in a parking lot, or driving at low speeds !! So why don't these groups go after the careless Drivers, instead of DiSSING the Cars !! Or was this whole thing DREAMED up in a back room in Detroit ! ?? -- Steven S. Lough, Pres. Seattle EV Association 6021 32nd Ave. N.E. Seattle, WA 98115-7230 Day: 206 850-8535 Eve: 206 524-1351 e-mail: [EMAIL PROTECTED] web: http://www.seattleeva.org ------------------------------ Message: 22 Date: Fri, 05 Oct 2007 11:35:04 -0600 From: Bill Dube <[EMAIL PROTECTED]> Subject: [EVDL] KillaCycle on NBC Today Show Tomorrow, Saturday, Oct 5th To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="us-ascii"; format=flowed Well, I guess you will have to choose on Saturday morning whether to listen to us live on the USA Biker Nation Show, or watch a segment on the NBC Today Show. I just got a call from NBC that they will be running the segment they filmed a couple of weeks ago at Bandimere Speedway. Bill Dube' ------------------------------ Message: 23 Date: Fri, 5 Oct 2007 17:49:30 +0000 From: damon henry <[EMAIL PROTECTED]> Subject: Re: [EVDL] LED driver that runs off of 12V To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1" > I tell the kids in my BEST class, "The first solution is the worst > solution." It's the one you arrived at without thinking; by doing > whatever seems easy or expedient or fashionable at the moment. But take > some time to *think* about the problem. How *many* ways can you find to > solve it? Often, your second or third or fourth ideas turn out to be > better choices! > > If you think about a problem long enough, you will frequently arrive at > a "best" solution; one that is so obviously right that once you've found > it, you'll slap yourself on the forehead and say, "Of course! That's it!" I have a similar theory, but mine consists of thinking things through until I have come up with what I term an elegant solution. Not only does it get the job done, but it's clean and simple. Sometimes for expediency sake I do go with the first solution, but I am never more satisfied and proud than when I put in enough thought time up front to come up with the elegant solution. Sometimes it takes days or weeks of chewing on a problem until it finally comes. damon _________________________________________________________________ Help yourself to FREE treats served up daily at the Messenger Caf?. Stop by today. http://www.cafemessenger.com/info/info_sweetstuff2.html?ocid=TXT_TAGLM_OctWLtagline ------------------------------ Message: 24 Date: Fri, 5 Oct 2007 12:02:46 -0600 From: Tim Humphrey <[EMAIL PROTECTED]> Subject: Re: [EVDL] LED driver that runs off of 12V To: EV <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="UTF-8" > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of damon henry > Sent: Friday, October 05, 2007 1:50 PM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] LED driver that runs off of 12V > > >> I tell the kids in my BEST class, "The first solution is the worst >> solution." It's the one you arrived at without thinking; by doing >> whatever seems easy or expedient or fashionable at the moment. But take >> some time to *think* about the problem. How *many* ways can you find to >> solve it? Often, your second or third or fourth ideas turn out to be >> better choices! >> >> If you think about a problem long enough, you will frequently arrive at >> a "best" solution; one that is so obviously right that once you've found >> it, you'll slap yourself on the forehead and say, "Of course! That's > it!" > > I have a similar theory, but mine consists of thinking things through > until I have come up with what I term an elegant solution. Not only does > it get the job done, but it's clean and simple. Sometimes for expediency > sake I do go with the first solution, but I am never more satisfied and > proud than when I put in enough thought time up front to come up with the > elegant solution. Sometimes it takes days or weeks of chewing on a > problem until it finally comes. > > damon > Well, it's been ten years and with just a little more planning I'll be ready to start my ev conversion.... ;-) Somehow, that seemed funny when I first thought of it. Now it just makes me sick. -- Stay Charged! Hump I-5, Blossvale NY ------------------------------ Message: 25 Date: Fri, 5 Oct 2007 14:05:12 -0400 (EDT) From: Lock Hughes <[EMAIL PROTECTED]> Subject: Re: [EVDL] Another EV in the News To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=iso-8859-1 This EV generates lift that exceeds drag, from ambient air: http://www.solarsailor.com/ Tks locK human-electric hybrid Toronto --- Marty Hewes <[EMAIL PROTECTED]> wrote: > Of course there is a hitch. If you were driving with the wind, the > net wind > speed would be lower, possibly zero. If you were driving into the > wind, I > think you'd have significant drag. A wind turbine doesn't have to > use > energy to counteract the wind drag, it's stuck in the ground, and > drag > doesn't go up linearly with speed, it goes up faster, but the turbine > output > goes up linearly, right? You might hit a net loss at higher winds? > There > must be some data out there from those wind powered boats that have > been in > the news. > > Marty > ----- Original Message ----- > From: "GWMobile" <[EMAIL PROTECTED]> > To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> > Cc: <[EMAIL PROTECTED]> > Sent: Friday, October 05, 2007 12:49 AM > Subject: Re: [EVDL] Another EV in the News > > > > There is one way this could work without violating physics - if it > > harnesses not just the wind from motion but actual wind thaat > existes > > without the car motion. > > > > After all landsailing races do this with a sail and haul ass at > over > > 70mph. > > > > If the wind recovery is charging a battery that powers a car > instead of > > going into a sail it could conceivably work. > > > > However it would be subject to the presence of regular wind OR**** > > The wind from passing powered cars which could itself put some > power > > into the car. > > > > Therefore it IS possible if you have efficient enough wind turbine > that > > capture all wind and not just the wind from the motion of the car. > > > > . > > > > > > On Thu, 4 Oct 2007 6:02 pm, Ben wrote: > >> I'd love to hear his side of it. Here's another interesting > article > >> about an invention of his - sounds like he's claiming to recover > >> energy from the "the wind power he felt one day while driving with > his > >> hand hanging out the car window." He claims his system captures > >> generates more power than it needs to propel the moped, which > "would > >> seemingly violate laws of physics." Hate to say it -- it does. > >> > >> I know reporters get facts wrong, but this guy does sound like a > >> quack. Google his name and you'll find other patents on ideas he's > >> trying to sell -- like the magnetic shock absorber he claims can > be > >> warranted for a thousand years. > >> > >> Ben > >> > >> New Electric Motor > >> > >> > >> The Associated Press > >> RACINE, Wis. ??? High gasoline prices don't bother Daren Luedtke. > He > >> prefers tooling around on an electric-powered, self-regenerating > >> moped. "It recharges the battery pack as you go down the highway," > >> said Luedtke of his invention, which he believes could replace the > >> internal combustion engine. > >> Luedtke, whose company is called Magna-Motor Inc., has spent > the > >> past 18 months trying to harness the wind power he felt one day > while > >> driving with his hand hanging out the car window. The result is an > >> electric-powered moped, with a trailer and generator attached to > the > >> back. > >> When mounted in a car, the electric motor would replace the > >> standard internal combustion engine, the battery pack would mount > on > >> the drive train and the generator would be near the radiator, > Luedtke > >> said. With the exception of the bearings in the generator, Luedtke > >> claims the vehicle would be virtually repair-free. "Every 10 years > or > >> so, you'd have to take it in for maintenance," he said. > >> Luedtke said his invention generates more energy than it uses > to > >> propel the moped. That would seemingly violate laws of physics. > >> "It'd be great if he did. It'd be worth millions and millions > of > >> dollars," said John Wheeldon, an adjunct professor in the > Milwaukee > >> School of Engineering's electrical engineering and computer > science > >> program. > >> Luedtke has applied for a patent on the charging system. His > hope > >> is to strike a deal with a major car manufacturer, despite the > fact > >> that electric cars have had mixed success on the market so far. > >> In January, General Motors Corp. announced it was ending > >> production of its electric car because of waning interest. The > world's > >> largest automaker said it would focus its efforts on a > high-efficiency > >> concept car powered by a fuel cell. > >> Toyota announced plans last month to sell about 12,000 of its > >> Prius gas-electric hybrid sedan in the next year. The Prius uses > an > >> electric motor and battery pack to boost mileage to about 50 mpg. > >> Nonetheless, Luedtke is offering to convert existing cars to > the > >> system for individual consumers who are interested. He estimates a > >> vehicle that has an electric motor would cost about $2,000 more > than > >> vehicles with internal combustion engines. > >> "It may add $2,000 to the price of the car," Luedtke said. > "But > >> $2,000 of not having to put gas in it is a good investment, as far > as > >> I'm concerned." > >> > >> On 10/4/07, Michael Barkley <[EMAIL PROTECTED]> wrote: > >>> Remember guys, have you EVer seen a news reporter get > >>> everything down correct, and not goof up a story when > >>> they actually sit down and write the article from his > >>> notes? They seldom if EVer ask the person who was > >>> interviewed to proof the article.... So instead of > >>> bashing the guy, maybe some of you guys in the know, > >>> could actually call him, and have a conversation about > >>> the conversion. Get him to enter it in the EVALBUM.COM > >>> site, and have him join the EVDL list. > >>> > >>> > >>> > >>> --- Tom Shay <[EMAIL PROTECTED]> wrote: > >>> > >>> > This story caused my bullshit detector to jump off > >>> > the desk and catch fire. > >>> > His Dodge Caravan goes 500 miles per charge on > >>> > sixteen golf cart > >>> > batteries (they look like Trojan T-105s). And there > >>> > are other flaws > >>> > and omissions in this story. Get news delivered with the All new Yahoo! Mail. Enjoy RSS feeds right on your Mail page. Start today at http://mrd.mail.yahoo.com/try_beta?.intl=ca ------------------------------ Message: 26 Date: Fri, 5 Oct 2007 14:24:14 -0400 From: Ben <[EMAIL PROTECTED]> Subject: Re: [EVDL] Another EV in the News To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=UTF-8 I may be missing something, but all I see are ship propulsion systems that use solar or generators to charge the batteries, or move via sale and collect power regeneratively for low-wind conditions. There's still outside power being contributed to the system in some way, either wind, solar, or fossil fuels. Ben On 10/5/07, Lock Hughes <[EMAIL PROTECTED]> wrote: > This EV generates lift that exceeds drag, from ambient air: > > http://www.solarsailor.com/ > > Tks > > locK > human-electric hybrid > Toronto > > > ------------------------------ Message: 27 Date: Fri, 5 Oct 2007 14:38:10 -0400 From: "storm connors" <[EMAIL PROTECTED]> Subject: Re: [EVDL] LED driver that runs off of 12V To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 The perfect is the enemy of the good. :-) On 10/5/07, Tim Humphrey <[EMAIL PROTECTED]> wrote: > > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > > Behalf Of damon henry > > Sent: Friday, October 05, 2007 1:50 PM > > To: Electric Vehicle Discussion List > > Subject: Re: [EVDL] LED driver that runs off of 12V > > > > > >> I tell the kids in my BEST class, "The first solution is the worst > >> solution." It's the one you arrived at without thinking; by doing > >> whatever seems easy or expedient or fashionable at the moment. But take > >> some time to *think* about the problem. How *many* ways can you find to > >> solve it? Often, your second or third or fourth ideas turn out to be > >> better choices! > >> > >> If you think about a problem long enough, you will frequently arrive at > >> a "best" solution; one that is so obviously right that once you've > found > >> it, you'll slap yourself on the forehead and say, "Of course! That's > > it!" > > > > I have a similar theory, but mine consists of thinking things through > > until I have come up with what I term an elegant solution. Not only > does > > it get the job done, but it's clean and simple. Sometimes for > expediency > > sake I do go with the first solution, but I am never more satisfied and > > proud than when I put in enough thought time up front to come up with > the > > elegant solution. Sometimes it takes days or weeks of chewing on a > > problem until it finally comes. > > > > damon > > > > Well, it's been ten years and with just a little more planning I'll be > ready to start my ev conversion.... ;-) > > Somehow, that seemed funny when I first thought of it. Now it just makes > me sick. > > > -- > Stay Charged! > Hump > I-5, Blossvale NY > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > -- http://www.austinev.org/evalbum/1059 http://stormselectric.blogspot.com/ Storm ------------------------------ Message: 28 Date: Fri, 5 Oct 2007 14:47:49 -0400 From: Ben <[EMAIL PROTECTED]> Subject: Re: [EVDL] Another EV in the News To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=UTF-8 Back to our original topic, I wrote an email to the inventor's company (couldn't find a personal email, but it sounds like a small enough operation that he should see the letter) requesting some more info, and inviting him to join the discussion here on EVDL. I asked a few questions that came to me while I was writing, but I'm fairly new here so maybe I missed something obvious. If anyone else wants to try their luck, I wrote to [EMAIL PROTECTED] Tried my best to honestly express our skepticism without being rude - hope I get a response. --------------------- Hello, The members of the Electric Vehicle Distribution List (EVDL -- http://www.evdl.org ) have had some pretty lively discussions this past week trying to make some sense just what you've accomplished with your new electric drive system. Obviously we are some of the last people who would naysay about an electric drive solution, but there obviously has been a little doubt about the claims -- you are stating a rather incredible range from a rather small collection of common lead acid batteries. We were wondering if you would be willing to answer a few questions and give some general information about your system (as you know, the media often gets the facts wrong). I understand that you have some patents on the associated technologies, and probably hope to capitalize on this -- we really just want some general descriptions of how the system operates, not the proprietary details. Few thoughts off the top of my head: 1. Under what conditions did you achieve the 150 mile range? Speed, terrain, depth of discharge at the end of the trip, etc. 2. What details can you share on your battery pack? Battery type, voltage, capacity, etc 3. It sounds like the constant velocity transmission is key to your claims -- How does this help you realize a longer range than you would accomplish driving the EV through a standard transmission or directly coupled to the drive shaft? I'd appreciate any additional information you can provide. I'll pass anything along to the EVDL, but it would also be wonderful if you'd be willing to join our list for some open discussion about your EV. We also have a site for the registration of electric vehicles, to share information with peers and people interested in EVs - feel free to register your prototype: http://www.austinev.org/evalbum/ Thanks for your time, Ben Robeson ------------------------------ Message: 29 Date: Fri, 05 Oct 2007 10:50:51 -0800 From: MIKE WILLMON <[EMAIL PROTECTED]> Subject: Re: [EVDL] KillaCycle on NBC Today Show Tomorrow, Saturday, Oct 5th To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii I suppose we'll all need to buy new T-Shirts now with your new Record, eh? On the new one you should leave the old printing and line it out, then put the new record under it. :-) Mike, Anchorage, Ak. ----- Original Message ----- From: Bill Dube <[EMAIL PROTECTED]> Date: Friday, October 5, 2007 9:39 am Subject: [EVDL] KillaCycle on NBC Today Show Tomorrow, Saturday, Oct 5th To: Electric Vehicle Discussion List <ev@lists.sjsu.edu> > Well, I guess you will have to choose on Saturday morning whether > to > listen to us live on the USA Biker Nation Show, or watch a segment > on > the NBC Today Show. > > I just got a call from NBC that they will be running the segment > they filmed a couple of weeks ago at Bandimere Speedway. > > Bill Dube' > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > ------------------------------ Message: 30 Date: Fri, 5 Oct 2007 14:52:26 -0400 From: "storm connors" <[EMAIL PROTECTED]> Subject: Re: [EVDL] Open source controller design To: "Electric Vehicle Discussion List" <ev@lists.sjsu.edu> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1 A 60w light bulb in series with the precharge limits the inrush effectively. On 10/5/07, Morgan LaMoore <[EMAIL PROTECTED]> wrote: > > On 10/4/07, Dan Frederiksen <[EMAIL PROTECTED]> wrote: > > cost vs power. 600V 80A for 2$ each at 500. I so far intend it to work > > from 100-400V. IGBT seems like the choice but if you know otherwise do > tell. > > No, if you want to operate up to 400V, IGBT definitely seems like the > smart choice. > > Personally, I'm interested in a smaller controller for about 72V > nominal, but it makes sense to support higher voltages. > > > >I'd recommend a snubber cap > > yeah that's a consideration. do you know any that might fit the bill? > > Something like these may be good: > > > http://search.ebay.com/search/search.dll?satitle=switching+circuit+capacitor&category0= > > I don't know if they're available for less than $20 from > Digikey/Mouser, though. We only need one per controller, but it's > still nice to get them cheaper. > > > I had thought the part number would make it easy to find but google > > doesn't know it seems. > > here it is though: http://www.pwrx.com/Result.aspx?g=73&m=78 > > > > the reason I want that is because I want it to be selfsufficient, > > especielly when adding on the DCDC. having a battery to help an electric > > car is absurd. this little device seems to offer freedom from that. > > costs 7$ at rell.com > > Yeah, that sounds like good reasoning. The part's datasheet says it's > for 140 to 360V input range, though; that limits our input range. > > > as I see it, the problem with automatic precharging seems to be that you > > have to switch on a connection that will be used to carry all the > > current in normal operation > > touching a third rail for a few seconds before first connection seems > > simple enough > > Before first connection? What if you turn off your EV, charge the > batteries, and turn it back on? Even with only 50V between batteries > and capacitor voltages, there will still be a huge inrush current, > which puts more stress on the capacitors. The capacitors will be > overworked enough as it is; no need to make it worse! > > You can still precharge without making the controller switch full > operating current. You could do it this way: put a small relay and > power resistor in series, and put those in parallel with the main > contactor. That way, when running, all the current goes through the > main contactor, not your circuit, but you can still precharge by > turning on the small relay and allowing current to bypass the main > contactor through a resistor of 20 ohms or so. This is essentially > what the solar car team does, except that we use separate main > contactors for the solar array and batteries. > > The precharge circuit doesn't even have to be built in to the > controller; you could make it discrete and hook it up to a switch in > the dash. That offloads the work from us onto the individual EV > builder, though, which I think is a bad thing. I think we should have > two connections for B+, one main one that handles the power and goes > through the main relay, and one that takes only milliamps while > running and bypasses the main contactor. > > Of course, you're the one > > -Morgan LaMoore > > _______________________________________________ > For subscription options, see > http://lists.sjsu.edu/mailman/listinfo/ev > -- http://www.austinev.org/evalbum/1059 http://stormselectric.blogspot.com/ Storm ------------------------------ _______________________________________________ EV@lists.sjsu.edu For subscription options, see http://lists.sjsu.edu/mailman/listinfo/ev End of EV Digest, Vol 3, Issue 17 *********************************