Search found 66 matches

by MikeG
Tue, 18 Nov 2008, 16:40
Forum: For Sale/Wanted
Topic: Wanted: ~20Ah battery
Replies: 13
Views: 1070

Wanted: ~20Ah battery

I was thinking an inverter actually... But I'm coming to the realisation that 250W might just be too little for a lawnmower... I've looked at various motors, such as the Oatley ones and even cheap 6hp winch motors... The issue is motor speed. A lawn mower needs to turn the blades at roughly 2800rpm....
by MikeG
Mon, 17 Nov 2008, 14:00
Forum: For Sale/Wanted
Topic: Wanted: ~20Ah battery
Replies: 13
Views: 1070

Wanted: ~20Ah battery

BTW, this is a push mower project (not ride-on), so the biggest issue we'll have is getting the blades turning...
by MikeG
Fri, 14 Nov 2008, 20:03
Forum: AEVA ACT Branch
Topic: EV Run to Canberra AGM 2009
Replies: 90
Views: 25908

EV Run to Canberra AGM 2009

Note the new topic covering the "EVent" here:

viewtopic.php?t=740

by MikeG
Mon, 10 Nov 2008, 15:58
Forum: Batteries, charging, management and monitoring
Topic: Power Consumption for Dummies
Replies: 144
Views: 16463

Power Consumption for Dummies

It's probably worth noting that a 12V battery that is not under load is actually around 13VDC when fully charged. There's probably a spec that states that a 12V battery will be rated at 12V when fully charged under x Amps load. If we're talking about voltage drop under load, we should probably ident...
by MikeG
Mon, 10 Nov 2008, 15:08
Forum: For Sale/Wanted
Topic: Wanted: ~20Ah battery
Replies: 13
Views: 1070

Wanted: ~20Ah battery

Fairly boring actually. A single 12V battery, to be fed into a 500W modified squarewave inverter, to power the 240V motor. I've been told that the anything but a sine-wave inverter will see a much lower efficiency, but I already have the 500W inverter, so I think I'll just plug it in and see...
by MikeG
Fri, 07 Nov 2008, 15:34
Forum: Batteries, charging, management and monitoring
Topic: Power Consumption for Dummies
Replies: 144
Views: 16463

Power Consumption for Dummies

I was with you up to the point you stated "Matt said the battery will drop roughly .2v per C..." I had to google a bit to get back on track here, so I thought I'd provide my findings here for other dummies wanting to learn more about batteries. According to the eBay battery buyers guide, "The capaci...
by MikeG
Fri, 07 Nov 2008, 15:17
Forum: For Sale/Wanted
Topic: Wanted: ~20Ah battery
Replies: 13
Views: 1070

Wanted: ~20Ah battery

For a electric lawnmower project.

Trying to avoid a Lead Acid battery for ethical reasons (disposal, lifespan)

Does anyone have something they want to sell or giveaway?

The rolls royce solution might be a Thundersky LFP40AHA I guess...

Mike
Canberra
by MikeG
Wed, 15 Oct 2008, 21:15
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

I've also been thinking about the possibility of fitting the motor at the rear (in the boot) and reversing the diffs and driveshaft, so the car initially runs the rear wheels, bringing the front wheels into action when needed (like in the Skyline GTR, etc)
by MikeG
Wed, 15 Oct 2008, 21:12
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

Johny wrote: Have a look at this rather expensive AWD twin motor setup:
http://www.metricmind.com/audi/main.htm


Yes, quite silly IMHO.
by MikeG
Wed, 15 Oct 2008, 20:44
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

Yes, from memory it does.

Suspension system, front: Independent suspension strut type
Suspension system, rear: Independent suspension parallel link strut system (sub frame attaching)

(all axles are drive axles, obviously)

by MikeG
Wed, 15 Oct 2008, 20:26
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

What are the average drivetrain losses on an AWD? I'm guessing they're up around 25% of you go through a gearbox, or say 10% if the motor is mounted to the front diff.
by MikeG
Wed, 15 Oct 2008, 16:53
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

I would have thought reducing the weight by 120kg would reduce the need for such a big motor, and hence you need less power... The volume (space) occupied by the batteries is a concern IMHO too...
by MikeG
Wed, 15 Oct 2008, 14:08
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

Guys, this sounds pretty good - thanks. The down side is to fit all this stuff in the car, we're probably getting rid of a lot of cargo and possible back seat space. :( The original car does 0-100 in around 6.5 sec, so it's not a stretch for this sort of car. Halve the batteries if this car is not f...
by MikeG
Tue, 14 Oct 2008, 16:44
Forum: Technical and conversion discussion
Topic: Hipo AWD project
Replies: 89
Views: 7658

Hipo AWD project

I'd like to know how much it would cost to do a conversion given a rolling chassis for a Nissan Bluebird SSS Attesa (AWD) Ltd. I want to retain the back seats and boot space. I want to go a high performance motor to attain 0-100 in under 5 seconds, and with a top speed of 110km/h. I want a range of ...
by MikeG
Fri, 03 Oct 2008, 15:07
Forum: General EV Discussion
Topic: Government Rebates for EV's
Replies: 42
Views: 1469

Government Rebates for EV's

I think I got my first urge to follow electric vehicles when I saw a fully laden earthmover spinning its wheels up a steep slope in the wet. This thing was only a baby, at 6-7 stories high. I read there's a new Komatsu out that is 17 stories high which can carry over 300 tonnes with a 2MW motor.
by MikeG
Fri, 03 Oct 2008, 14:25
Forum: General EV Discussion
Topic: Government Rebates for EV's
Replies: 42
Views: 1469

Government Rebates for EV's

A little off topic, but... Maybe, rather than urging Car companies to make electric cars, we should be talking to Elevator and crane companies. These companies have been dealing with electric motors for decades. In fact mining companies have most of their hardware running electric. Go check out an o...
by MikeG
Thu, 02 Oct 2008, 16:52
Forum: General EV Discussion
Topic: Government Rebates for EV's
Replies: 42
Views: 1469

Government Rebates for EV's

90% of people won't be doing a DIY conversion, let's be realistic. Let's look at LPG. You can't do your own conversion unless you happen to a be licensed LPG converter. There is a selection of LPG systems and suppliers, but the prices magically jumped when the rebate came in... The same thing will h...
by MikeG
Thu, 02 Oct 2008, 14:54
Forum: General EV Discussion
Topic: Government Rebates for EV's
Replies: 42
Views: 1469

Government Rebates for EV's

On the topic of rebates, we've seen this before with water tanks, LPG conversions, solar arrays, etc etc. All these rebates tend to do is jack prices up as providers profiteer. We want to make it easier for people to do electric conversions, rather than lining the pockets of EV converters. That and ...
by MikeG
Thu, 02 Oct 2008, 14:42
Forum: General EV Discussion
Topic: Government Rebates for EV's
Replies: 42
Views: 1469

Government Rebates for EV's

Are pensioners or unemployed people likely to convert their car to electric - I think not... but if they do, it'll be because they're enthusiests and they won;t be doing it for the money...

MikeG
by MikeG
Fri, 26 Sep 2008, 15:23
Forum: Technical and conversion discussion
Topic: Automatic EV
Replies: 5
Views: 948

Automatic EV

Has anyone retained the automatic gearbox in an EV conversion? What needs to be done? Does the AT need to be re-tuned to suit the new powerplant (different torque converter and change points)?

MikeG
by MikeG
Thu, 25 Sep 2008, 21:12
Forum: Technical and conversion discussion
Topic: 200SX conversion
Replies: 29
Views: 4429

200SX conversion

If the Tesla was available/supportable in Oz and had back seats I'd buy one...
by MikeG
Thu, 25 Sep 2008, 20:59
Forum: Technical and conversion discussion
Topic: 200SX conversion
Replies: 29
Views: 4429

200SX conversion

Tesla specs here: http://www.teslamotors.com/performance/perf_specs.php Motor: 375 volt AC induction air-cooled electric motor with variable frequency drive. Output 248 peak horsepower (185kW) and 276 ft/lbs (375 nm) of torque. Redline 14,000 rpm. Acceleration: 0 to 60 mph in under 4 seconds Top Spe...
by MikeG
Thu, 25 Sep 2008, 20:01
Forum: Technical and conversion discussion
Topic: 200SX conversion
Replies: 29
Views: 4429

200SX conversion

What's your best guess?
by MikeG
Thu, 25 Sep 2008, 19:52
Forum: Technical and conversion discussion
Topic: 200SX conversion
Replies: 29
Views: 4429

200SX conversion

Good question Ian. The timeframe I'm looking at to build this is a couple of years, prob a year before I decide on a design... Performance? I don't think I could go backwards, although realistically I could probably make do with a top speed of 130km/h :) I want 100km range from the car... -- So how ...
by MikeG
Thu, 25 Sep 2008, 19:27
Forum: Technical and conversion discussion
Topic: 200SX conversion
Replies: 29
Views: 4429

200SX conversion

> a gearbox will solve torque issues, but not power issues. > its all about the ratios. Isn't that what a gearbox does? Sort out your ratios, rather than having a single gear that compromises on your final ratio. If I want a quick 0-100 time the ratio is going to be different to the one I want for c...