Search found 74 matches

by markrmarkr
Mon, 18 Jun 2012, 21:03
Forum: The Lounge
Topic: Howto convince your partner to let U build an EV
Replies: 33
Views: 4255

Howto convince your partner to let U build an EV

Terry, that's good to hear. I think using the cable gage to limit charging rate is an excellent, almost foolproof way of doing it.   The potential to destroy your pack if your distracted for like 30 seconds, is a real possibility which worries me no end. I understand the CHAdeMO DC fast charger is a...
by markrmarkr
Mon, 18 Jun 2012, 17:27
Forum: The Lounge
Topic: Howto convince your partner to let U build an EV
Replies: 33
Views: 4255

Howto convince your partner to let U build an EV

Matt, how about this 1.5KW Inverter on Ebay for $600 .   It'll operate with 100 - 550 V DC, which should cover most EV's The payback time for $600 should be less than a year, though there are other costs....   This is still the only approach that seems to get through to her. ------------------------...
by markrmarkr
Fri, 18 Mar 2011, 00:06
Forum: The Lounge
Topic: Grid Connect PV systems
Replies: 104
Views: 17388

Grid Connect PV systems

Goodness,
con rods, connecting rods, seals cracking chambers... I just had a moment of deja-vu. What was the name of that ancient device people used to use to power their cars???
by markrmarkr
Thu, 17 Mar 2011, 01:32
Forum: The Lounge
Topic: Howto convince your partner to let U build an EV
Replies: 33
Views: 4255

Howto convince your partner to let U build an EV

Who killed the electric car is inspiring stuff I take it. I keep hearing about that movie - maybe it's worth a try.

by markrmarkr
Thu, 17 Mar 2011, 01:28
Forum: The Lounge
Topic: Howto convince your partner to let U build an EV
Replies: 33
Views: 4255

Howto convince your partner to let U build an EV

If I can keep it down to close to $20K I'll be over the moon. Curtis is coming out with a 144V version of the 1238 soon. I actually tried the asking her opinion approach. Unfortunately she wants something the size of a ford falcon or bigger, With aircon, ABS, and Airbags.    http://forums.aeva.asn.a...
by markrmarkr
Wed, 16 Mar 2011, 19:49
Forum: The Lounge
Topic: Howto convince your partner to let U build an EV
Replies: 33
Views: 4255

Howto convince your partner to let U build an EV

I think a lot of people are in a similar situation to me when I say “the biggest hurdle for me to start an electric car build is convincing my partner that it's a good idea”. I didn't find much help when I searched, at least not in a structured, able to be presented manor. So I thought maybe it woul...
by markrmarkr
Fri, 18 Feb 2011, 19:52
Forum: General EV Discussion
Topic: Blade EV - New model
Replies: 104
Views: 14170

Blade EV - New model

I too would like to know which motor and controller are being used. If it's Australian there are not many options other than Tritium are there?

Using a modern glider I'd think CAN integration would be a big advantage for Tritium too.
by markrmarkr
Mon, 14 Feb 2011, 17:00
Forum: Electric motors and controllers
Topic: AC motor 1st time running, strange vibrations
Replies: 36
Views: 20748

AC motor 1st time running, strange vibrations

I think I understand what what your trying to do Hub. You want to have sort of an electric gear change by switching between delta and star/parrallel and series. What I don't understand is how you plan to tune your controller (AMA) for both configurations.   Are you planning to use two controllers?  ...
by markrmarkr
Fri, 28 May 2010, 15:10
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

system voltage is the nominal voltage of the battery pack. so that controller is intended for between 36 and 48 lead acid cells. so minimum voltage to run is at least ~63v, and maximum voltage is at least 115v .. 66.3kva@550A suggests 113v at the batteries. they would have to be some very stiff bat...
by markrmarkr
Fri, 28 May 2010, 03:00
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

Have checked out the Curtis website. They have a section for the 1238-75. Maybe the model name variation makes it hard to find. Manual 1238-75 And Data Sheet 1238-75 But they only refer to volatge range of 72-96V. and 2min RMS Power Rating 62.3 kVA. Being such a compact controller requiring heatsin...
by markrmarkr
Thu, 27 May 2010, 21:28
Forum: General EV Discussion
Topic: Any commercial EV suppliers in Australia?
Replies: 9
Views: 1623

Any commercial EV suppliers in Australia?

Damn,

I have to say the website is impressive. I was actually holding off on showing it to the wife because I was afraid she would want one of their cars instead of me building one. It just goes to show - you can't believe everything you see on the internet.
by markrmarkr
Wed, 26 May 2010, 19:57
Forum: General EV Discussion
Topic: Any commercial EV suppliers in Australia?
Replies: 9
Views: 1623

Any commercial EV suppliers in Australia?

marcopolo wrote:

I may have missed someone....


Don't think you got this one, but I didn't know about some of yours so there could be some cross pollination.
by markrmarkr
Wed, 26 May 2010, 14:05
Forum: General EV Discussion
Topic: Off-throttle-regen and a clutchless Gearbox
Replies: 4
Views: 769

Off-throttle-regen and a clutchless Gearbox

Some good ideas there - but maybe I should just do something easy like use the neutral switch in the gearbox to tell the controller not to apply regen. I could even put a half second delay on it to give the synchros time to engage. What am I saying! This is the perfect opportunity to make things MOR...
by markrmarkr
Tue, 25 May 2010, 18:26
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

Mark, I urge a bit more caution that Matt. I can't imagine that Curtis would use components that were rated any higher than they had to be to meet the 96V requirement. Having to knock off the surface charge before connecting the controller would be an accident waiting to happen (to coin a cliché). ...
by markrmarkr
Tue, 25 May 2010, 02:52
Forum: General EV Discussion
Topic: Off-throttle-regen and a clutchless Gearbox
Replies: 4
Views: 769

Off-throttle-regen and a clutchless Gearbox

I've heard that it can be a pain in the a$$ using off-throttle-regen when you have a clutchless gear box, because your controller tries to slow down the motor and this makes it harder for the synchros when you try to select a gear. Does anyone have experience with this, and if so how did you get aro...
by markrmarkr
Tue, 25 May 2010, 02:19
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

you could go to a 108v nominal battery for lead acid. you would have to knock off the surface charge before powering up the controller. at full charge, voltage would be ~120v. in lithium, you could go to 35 cells, and set your chargers CV stage to 120v. Matt I was planning to use 36 cells of SE cha...
by markrmarkr
Mon, 24 May 2010, 13:43
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

    The voltage will be limited by the controller more than anything else (IIRC, curtis don't mkae AC controllers above ~96v). btw, dont get that kit from evcomponents, they've since gone under. Matt Apparently the Curtis 1238-7501 can be pushed to 120v with issues from 130V. I know of some people ...
by markrmarkr
Mon, 24 May 2010, 03:19
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

We (forum folk) have discussed this one as well (I'll try to find the thread). The consensus was that while regen tends to drop out below 5-10kmh it doesn't help with ABS style operation at higher speeds. Excessive regen that causes the wheels to turn at a slower speed than the nominal road speed w...
by markrmarkr
Mon, 24 May 2010, 02:48
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

Wow Mal, your after performance.   And your keeping the gearbox too. (ed typo)

I was planning on using this but upping the voltage to 120V. It's a 9 inch AC motor (bolt-on equivalent to DC 9inch).   I think it should be ok with the Impreza.   What do you think?
by markrmarkr
Fri, 21 May 2010, 04:08
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

The spring-loaded lever seems like the safest, easiest option for me. I've been thinking about that too and the reason I don't want to go that way is not because of other drivers, it's because I'm worried about me. I don't want to have a situation where I need a brake quickly but can't make up my m...
by markrmarkr
Fri, 21 May 2010, 03:54
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

Mal, I think I've met you at the last Sydney meeting. You had your hilux there, with a genset on the back.   You said it kept tripping out because of the switch mode charges you use.   Was that you? I was going to contact you after Johny pointed me at your thread a couple of posts back, but I had n...
by markrmarkr
Thu, 20 May 2010, 21:02
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

Jonny, thanks for those links. I guess I shouldn't be surprised that all my thoughts have already been thought of before. Back to the original topic AWD with regen vs 2WD with regen - you quote 0 - 15% gain, but I think that assumes conventional 2WD regen. The way I understand most regen setups work...
by markrmarkr
Thu, 20 May 2010, 15:42
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

It is an interesting design problem (in the control system) of how to reap maximum return from regen braking with a 2WD vehicle and have it safe to drive for anyone. Yes I was thinking about that too. Using regen on a 2WD will effectively change the brake bias, where as on a 4WD this effect is redu...
by markrmarkr
Thu, 20 May 2010, 14:54
Forum: General EV Discussion
Topic: 4WD and regen
Replies: 32
Views: 3559

4WD and regen

I've been wondering how 4WD goes with regen -vs- 2WD with regen. I keep hearing that the most efficient configuration is front wheel drive, and 4WD is the worst because of losses through multiple differentials, drive shafts etc. But I'm wondering - With a 4WD and regen you should get almost double t...
by markrmarkr
Tue, 13 Apr 2010, 13:03
Forum: EV Motoring
Topic: ABC Lateline
Replies: 30
Views: 4239

ABC Lateline

I'm not so much interested in winning an argument with Clive as convincing the interviewer that our position is untouchable and the whole focus will change to something more sensible like: 1. Why don't people who convert their cars get a tax break or reduced registration fees. 2. How employers can b...