Search found 118 matches
- Tue, 16 Jun 2009, 20:01
- Forum: Members Machines
- Topic: Red Suzi
- Replies: 217
- Views: 65449
Red Suzi
For the maximum safety, it would be nice to make the amount of travel of the brake pedal in regen mode (where it could be ineffective if the batteries are full) as short as possible. Yet have a moderate range of regen, from very mild to about half. (Exactly how far depends on the vehicle; rear whee...
- Fri, 12 Jun 2009, 19:21
- Forum: Batteries, charging, management and monitoring
- Topic: BMS free zone battery management
- Replies: 41
- Views: 6252
BMS free zone battery management
So, how to detect an unbalanced or faulty in a string without connecting to each cell ? (remember, you are already connected via the string). Thinking caps gents ! http://forums.aeva.asn.au/smileys/smiley23.gif I'm mostly out of my depth in this discussion but it occurred to me that as you (acmotor...
- Wed, 03 Jun 2009, 23:16
- Forum: Technical and conversion discussion
- Topic: How to measure frontal area?
- Replies: 18
- Views: 9890
How to measure frontal area?
By the way my Golf tells me it uses 0.2L per hour to run the Air Con. Can any of the chaps out there convert that to Watts consumption? I'm bored so I'm going to have a very rough bash at it... and then everyone can point out where I went wrong http://forums.aeva.asn.au/smileys/smiley36.gif So 200m...
- Tue, 02 Jun 2009, 18:52
- Forum: General EV Discussion
- Topic: Dashpad Restoration
- Replies: 13
- Views: 3727
Dashpad Restoration
I thought I'd do it so they didn't get wrecked a bit (where the clips pull through). They were damp at the bottom so I'll have to redo them all anyway - I was just going to re-cover them - now it's a whole new door liner x 4. What do the door liners look like? if you are going to recover them I'd m...
- Tue, 02 Jun 2009, 18:43
- Forum: General EV Discussion
- Topic: Light weight kit car, 4 wheel drive.
- Replies: 14
- Views: 3065
Light weight kit car, 4 wheel drive.
I was just guessing based off your username, guess I guessed wrong... they're not my taste either, just I'd heard of them.Bluefang wrote: I finaly found the nota-fang Fuzzy hair man mentioned not quite my taste
- Tue, 02 Jun 2009, 18:34
- Forum: Electric motors and controllers
- Topic: current limiting on Curtis and TS cells
- Replies: 74
- Views: 13062
current limiting on Curtis and TS cells
parafin wax melts/solidifies at 25 dec C IIRC. using a phase change increases temperature stability considerably (a phase change absorbs/releases several times more energy than simple temperature rise/fall can). Matt OK. Lets put some numbers to it. The volume of the cells is about 20 times the vol...
- Mon, 01 Jun 2009, 21:51
- Forum: Electric motors and controllers
- Topic: current limiting on Curtis and TS cells
- Replies: 74
- Views: 13062
current limiting on Curtis and TS cells
So, ideally your battery box will be capable of temperature control, both cooling and heating keeping you batts in the optimum operating environment. You could call it climate control and pipe it into the cab as well. LOL Well you might already have a water/fluid heater in the front to work your he...
- Fri, 29 May 2009, 22:27
- Forum: Technical and conversion discussion
- Topic: Soapbox on regenerative braking
- Replies: 278
- Views: 40748
Soapbox on regenerative braking
Who threw the spanner in the works about Synchro in gear wear?? Please get some information and ask what goes first in Gearbox and what last the life of a gearbox.. I say no more The subject runs well and everyone following the thread.. Then some plurry I---.. Well, I did but I have a reason for th...
- Fri, 29 May 2009, 18:35
- Forum: Technical and conversion discussion
- Topic: Soapbox on regenerative braking
- Replies: 278
- Views: 40748
Soapbox on regenerative braking
The rotor in my 132 frame size induction motor is about 20kg. Types with copper squirrel cage bars are up around 25-30kg. Is the motor all up about 70 -80kg? (the ABB catalogue has 11kW 132 frame high output motors at 76kg) so rotor ~= 1/4 motor weight? So we've increased by about a factor of 10 th...
- Fri, 29 May 2009, 17:32
- Forum: General EV Discussion
- Topic: Light weight kit car, 4 wheel drive.
- Replies: 14
- Views: 3065
Light weight kit car, 4 wheel drive.
It's not a NotaFang (spelling?) that your looking at building is it?
- Fri, 29 May 2009, 17:03
- Forum: Technical and conversion discussion
- Topic: Soapbox on regenerative braking
- Replies: 278
- Views: 40748
Soapbox on regenerative braking
Wanted to run this past the forum, see what you'll thought. What if I set regen to be equivalent to my car's current engine braking force (by experiment), but this level of regen can be reduced down to zero by pressing the clutch pedal in. The clutch itself will not be connected to the gearbox as t...
- Thu, 28 May 2009, 22:06
- Forum: AEVA VIC Branch
- Topic: Seemingly perfect mini donor car (rolling shell)
- Replies: 11
- Views: 5920
Seemingly perfect mini donor car (rolling shell)
Interesting thought. Classic car buffs would be aghast at the idea I'm sure, but eventually electric conversions will probably by the only way of seeing some of these older cars on the road. I actually see it as a positive thing if even new cars are changing engines to go to EVs then the old cars...
- Thu, 28 May 2009, 20:20
- Forum: Batteries, charging, management and monitoring
- Topic: Silly Charging Idea No2
- Replies: 20
- Views: 3218
Silly Charging Idea No2
What about luxeon led's, you can buy an MR16 12V 3W luxeon light off of ebay for 20ish bucks, they only give off about the same as a 20w halogen though. Look for Luxeon Rebel LEDs or Cree or Seoul LEDs these should be much more efficient than the older Luxeons, LED technology has been moving faster...
- Thu, 28 May 2009, 19:07
- Forum: AEVA VIC Branch
- Topic: Seemingly perfect mini donor car (rolling shell)
- Replies: 11
- Views: 5920
Seemingly perfect mini donor car (rolling shell)
The big difference with the early minis is that they had rubber cone suspension, but the later types had the hydrolastic system. It weighs about 30kg more than the rubber cone setup. The early types (ie, 850's) also were even more bare-bones than the later types, eg sliding windows (no winding mech...
- Thu, 28 May 2009, 17:27
- Forum: AEVA VIC Branch
- Topic: Seemingly perfect mini donor car (rolling shell)
- Replies: 11
- Views: 5920
Seemingly perfect mini donor car (rolling shell)
BTW I'm told the (perhaps early, not sure) 850 minis I'm told are some what lighter than the later minis because they used thinner sheet for the panels, apparently this made them a prefered candidate for racing.
- Mon, 25 May 2009, 23:14
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
The subaru dual range boxes can be shifted on the move. Not sure what they do different to others. Interesting that in the old part time 4WD subarus the warnings about using 4wd on hard surfaces are really weakly worded, like "if you feel the transmission winding up or the steering resisting y...
- Fri, 22 May 2009, 20:20
- Forum: Technical and conversion discussion
- Topic: Horizontal Fuel Cap as Power Inlet
- Replies: 17
- Views: 3048
Horizontal Fuel Cap as Power Inlet
The retractable extension cord is interesting but how do I stop deluging rain filling up the boot via the filler hole during recharge? Could you file the side out of the filler housing so you have a groove to set the extension cord in and then close the cap? you could put a rubber grommet or someth...
- Thu, 21 May 2009, 21:38
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
It seems we have been down the torque converter road before:
Previous topic on manual vrs auto gearboxes and torque converters
EDIT: grammar and:
The idea was more to get off the line and not as a second gear but still...
Previous topic on manual vrs auto gearboxes and torque converters
EDIT: grammar and:
The idea was more to get off the line and not as a second gear but still...
- Thu, 21 May 2009, 21:10
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
resulting in the violent dispersal of hot oil and metal fragments over a wide area. http://forums.aeva.asn.au/smileys/smiley19.gif Certainly sound like they can go out in a blaze of glory... http://forums.aeva.asn.au/smileys/smiley34.gif So long periods of slippage could be a problem... http://foru...
- Thu, 21 May 2009, 18:43
- Forum: EV Motoring
- Topic: Tesla in Australia
- Replies: 58
- Views: 12128
Tesla in Australia
Daimler buying into Tesla probably represents some cheap insurance for Daimler, I think they are more focused on fuel cells aren't they? if they don't make fuel cells happen Tesla probably have the battery systems knowledge Daimler needs to get batteries into those cars. Or Daimler might be turning ...
- Thu, 21 May 2009, 18:18
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
So rather than toss out the torque converter and fiddle with an automatic transmission that doesn't understand e-motors anyway, toss the auto transmission and all its weight, and keep just the torque converter. That leaves the efficiency consideration. But we agree that the lock-up versions are eff...
- Wed, 20 May 2009, 21:53
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
Sorry - my mistake, brain in neutral - didn't even read it off the speadsheet properly... Actually this got me thinking and cleared up some confusion I was having: In another thread ACMotor said: If you can climb 15deg (slowly) that will cover most situations. If you can hold 60kmph on 10 deg you a...
- Wed, 20 May 2009, 19:33
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
Gradient climb at 40k/h goes from 1 in 7.3 (about 14 degrees) to 1 in 4 or 25 degrees. Any greater ratio would not be useful - maybe a fraction less, but 2:1 would be about right. Don't you mean percentage grade rather than degrees? 1 in 7.3 = 0.136 = ~14% grade rather than atan(1/7.3) = 7.8 degree...
- Wed, 20 May 2009, 18:10
- Forum: General EV Discussion
- Topic: 2 Speed Gearbox
- Replies: 309
- Views: 61139
2 Speed Gearbox
Do others agree that 2nd and 4th are the best gears for most setups? eg. 2:1 and 1:1? It's going to depend isn't it? http://forums.aeva.asn.au/smileys/smiley5.gif which motor? peak torque? desired top speed? what diff ratio? what RPM gives the best efficiency? what is going to be the 'cruising' or ...
- Mon, 11 May 2009, 20:25
- Forum: Batteries, charging, management and monitoring
- Topic: Optimum China Batteries
- Replies: 70
- Views: 14371
Optimum China Batteries
Indeed a quick decision, can you PM me the specifications - or email me a hemonster at gmail. 40Ah would be nice, but we're talking ~USD$10K for a 600V cell stack, - a 20Ah would be ideal for me at that price. Alas, there is nothing smaller than 40 Ah at this stage. Their web page is out of date; t...