Search found 118 matches

by fuzzy-hair-man
Tue, 16 Jun 2009, 20:01
Forum: Members Machines
Topic: Red Suzi
Replies: 217
Views: 53901

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...
by fuzzy-hair-man
Fri, 12 Jun 2009, 19:21
Forum: Batteries, charging, management and monitoring
Topic: BMS free zone battery management
Replies: 41
Views: 4930

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...
by fuzzy-hair-man
Wed, 03 Jun 2009, 23:16
Forum: Technical and conversion discussion
Topic: How to measure frontal area?
Replies: 18
Views: 6162

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...
by fuzzy-hair-man
Tue, 02 Jun 2009, 18:52
Forum: General EV Discussion
Topic: Dashpad Restoration
Replies: 13
Views: 2883

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...
by fuzzy-hair-man
Tue, 02 Jun 2009, 18:43
Forum: General EV Discussion
Topic: Light weight kit car, 4 wheel drive.
Replies: 14
Views: 2150

Light weight kit car, 4 wheel drive.

Bluefang wrote: I finaly found the nota-fang Fuzzy hair man mentioned not quite my taste
I was just guessing based off your username, guess I guessed wrong... Image they're not my taste either, just I'd heard of them. Image
by fuzzy-hair-man
Tue, 02 Jun 2009, 18:34
Forum: Electric motors and controllers
Topic: current limiting on Curtis and TS cells
Replies: 74
Views: 8748

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...
by fuzzy-hair-man
Mon, 01 Jun 2009, 21:51
Forum: Electric motors and controllers
Topic: current limiting on Curtis and TS cells
Replies: 74
Views: 8748

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...
by fuzzy-hair-man
Fri, 29 May 2009, 22:27
Forum: Technical and conversion discussion
Topic: Soapbox on regenerative braking
Replies: 278
Views: 30633

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...
by fuzzy-hair-man
Fri, 29 May 2009, 18:35
Forum: Technical and conversion discussion
Topic: Soapbox on regenerative braking
Replies: 278
Views: 30633

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...
by fuzzy-hair-man
Fri, 29 May 2009, 17:32
Forum: General EV Discussion
Topic: Light weight kit car, 4 wheel drive.
Replies: 14
Views: 2150

Light weight kit car, 4 wheel drive.

It's not a NotaFang (spelling?) that your looking at building is it?
by fuzzy-hair-man
Fri, 29 May 2009, 17:03
Forum: Technical and conversion discussion
Topic: Soapbox on regenerative braking
Replies: 278
Views: 30633

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...
by fuzzy-hair-man
Thu, 28 May 2009, 22:06
Forum: AEVA VIC Branch
Topic: Seemingly perfect mini donor car (rolling shell)
Replies: 11
Views: 5031

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...
by fuzzy-hair-man
Thu, 28 May 2009, 20:20
Forum: Batteries, charging, management and monitoring
Topic: Silly Charging Idea No2
Replies: 20
Views: 2358

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...
by fuzzy-hair-man
Thu, 28 May 2009, 19:07
Forum: AEVA VIC Branch
Topic: Seemingly perfect mini donor car (rolling shell)
Replies: 11
Views: 5031

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...
by fuzzy-hair-man
Thu, 28 May 2009, 17:27
Forum: AEVA VIC Branch
Topic: Seemingly perfect mini donor car (rolling shell)
Replies: 11
Views: 5031

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.
by fuzzy-hair-man
Mon, 25 May 2009, 23:14
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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 you sh...
by fuzzy-hair-man
Fri, 22 May 2009, 20:20
Forum: Technical and conversion discussion
Topic: Horizontal Fuel Cap as Power Inlet
Replies: 17
Views: 2372

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...
by fuzzy-hair-man
Thu, 21 May 2009, 21:38
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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...
by fuzzy-hair-man
Thu, 21 May 2009, 21:10
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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...
by fuzzy-hair-man
Thu, 21 May 2009, 18:43
Forum: EV Motoring
Topic: Tesla in Australia
Replies: 58
Views: 9155

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 ...
by fuzzy-hair-man
Thu, 21 May 2009, 18:18
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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...
by fuzzy-hair-man
Wed, 20 May 2009, 21:53
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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...
by fuzzy-hair-man
Wed, 20 May 2009, 19:33
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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...
by fuzzy-hair-man
Wed, 20 May 2009, 18:10
Forum: General EV Discussion
Topic: 2 Speed Gearbox
Replies: 309
Views: 50484

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 ...
by fuzzy-hair-man
Mon, 11 May 2009, 20:25
Forum: Batteries, charging, management and monitoring
Topic: Optimum China Batteries
Replies: 70
Views: 12182

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...