Search found 492 matches

by bga
Sat, 21 Apr 2012, 02:45
Forum: Technical and conversion discussion
Topic: Anyone try SCiBTM Toshiba LiTiO batteries?
Replies: 8
Views: 1971

Anyone try SCiBTM Toshiba LiTiO batteries?

Hmm C-Rate, The literature indicates that the durability tests were conducted at 3C, the 6 minute (8C stated) charge cycle indicates that the battery is probably able to discharge at more than 5C, possibly 10C peak. It is a 2009 website, so there are the updates? There does seem to be some 2011 stuf...
by bga
Mon, 02 Apr 2012, 20:54
Forum: EV Motoring
Topic: Renault Zoe
Replies: 8
Views: 1981

Renault Zoe

Uses a "synchronous motor with rotor coil". I'm guessing this is either a permanent motor synchronous machine with a rotor coil (and sliprings with brushes) to weaken the permanent field for higher speed operation, or more likely it has no permanent magnets at all, and is completely wound rotor. Ei...
by bga
Fri, 30 Mar 2012, 05:30
Forum: Members Machines
Topic: Bruce Armstrong's BMW E30
Replies: 17
Views: 5399

Bruce Armstrong's BMW E30

I'm being economical with posts... Battery frames These battery frames are complicated beasts (what did I expect with 160 cells??), I'm still welding bits of steel onto them, but those bits are getting successively smaller, so the end is near. I expect to achieve practical completion this weekend, ...
by bga
Tue, 20 Mar 2012, 19:07
Forum: General EV Discussion
Topic: [Rich &] Prius Drivers Behave Worse?
Replies: 30
Views: 4042

[Rich &] Prius Drivers Behave Worse?

The blind spots are a good point. Some people ask "why do new cars have such small windows?" Part of the reason is to increase the perception of safety. (Thinks BatFink ... "these wings are like a shield of steel") It also makes the cars better for drive-by shootings, as the Chrysler 300C was descri...
by bga
Mon, 19 Mar 2012, 06:24
Forum: General EV Discussion
Topic: [Rich &] Prius Drivers Behave Worse?
Replies: 30
Views: 4042

[Rich &] Prius Drivers Behave Worse?

Hi bladecar, It's the johnnycab from Schwarzenegger's 'Total Recall'. Perhaps there's a similarity, though. One aspect of diesels is that they idle significanly more efficiently than petrol engines, so are better in city and slow moving traffic. Overall, diesels can be 50% more efficient that a petr...
by bga
Sat, 17 Mar 2012, 17:34
Forum: General EV Discussion
Topic: [Rich &] Prius Drivers Behave Worse?
Replies: 30
Views: 4042

[Rich &] Prius Drivers Behave Worse?

Stupid people can't afford a Prius. And the smart ones buy small diesels these days http://forums.aeva.asn.au/smileys/smiley1.gif Speaking of bad drivers, A was asking the communications technicians at work about this a while ago. They unanimously agreed that black utes are the ones they most notic...
by bga
Sun, 11 Mar 2012, 20:34
Forum: Members Machines
Topic: Bruce Armstrong's BMW E30
Replies: 17
Views: 5399

Bruce Armstrong's BMW E30

It's becoming a real EV project: I've done for first remake of a component. The rear battery frame is now 4 x 18 for 72 cells and is 866mm wide, 224mm high, 483mm long. I had an interseting conversation with my powdercoater. They have a zinc primer powder process which looks to be a good alternative...
by bga
Wed, 07 Mar 2012, 04:30
Forum: The Lounge
Topic: The death of Peak Oil (according to Kohler)
Replies: 6
Views: 1412

The death of Peak Oil (according to Kohler)

There was another about the dodgy economics of the shale gas/oil producers in the United States: Gas Boom Goes Bust Coal seam gas is probably cheaper to exploit but, in my opinion, has significantly worse issues with ground water contamination and figitive emissions because of the comparitively shal...
by bga
Wed, 07 Mar 2012, 02:43
Forum: The Lounge
Topic: The death of Peak Oil (according to Kohler)
Replies: 6
Views: 1412

The death of Peak Oil (according to Kohler)

I think Alan's been reading the shale gas prospectuses (prospectii?) that paint an overly-optimistic picture of the resources. Even the mighty Gulf of Mexico oil and gas deposits only succeeded in reversing the USA's post-peak oil production decline for a couple of years. It's hard to see shale oil ...
by bga
Wed, 07 Mar 2012, 01:56
Forum: Members Machines
Topic: Bruce Armstrong's BMW E30
Replies: 17
Views: 5399

Bruce Armstrong's BMW E30

There is movement at the station. It's been a while, but I have fiunally submitted the modification application. I dnd't want to do this until ready to commit. Current task is to make up the battery frames, which I can do from the dimensions I took off the vehicle - a set of sections of the engine b...
by bga
Wed, 22 Feb 2012, 05:04
Forum: Technical and conversion discussion
Topic: Terminal blocks: evil or OK?
Replies: 15
Views: 3637

Terminal blocks: evil or OK?

Bootlace ferrules -- yes good Altronics has a selection. I have found them to acceptable and very similar to the ones RS sells. The altronics ferrule crimp tool also works well. I have had a good run with vise type terminals, the ones that have parallel jaws that the screw closes. These are common i...
by bga
Tue, 27 Dec 2011, 00:22
Forum: General EV Discussion
Topic: Lovely little EV van from new player Boulderev.com
Replies: 4
Views: 1032

Lovely little EV van from new player Boulderev.com

More interestingly,

The 'who we are' page includes Bill Dube of Killacycle fame as one of the 'wheels' of the company. It's a safe assumption that the vehicle does everything they say it does.

It's a big vehicle, at least as large as a Transit Van.

Cheers
by bga
Wed, 23 Nov 2011, 22:32
Forum: Electric motors and controllers
Topic: speed control versus torque control
Replies: 19
Views: 5702

speed control versus torque control

True speed control would be very unpleasant. A small change in throttle position would result in a sudden jerk as you accelerated at maximum torque, then another jerk once the set speed is reached and the torque drops down. Holden cruise control works like this and it's not good. Each time a a hill...
by bga
Wed, 23 Nov 2011, 22:11
Forum: EV Motoring
Topic: Revenge of the internal combustion engine
Replies: 13
Views: 2887

Revenge of the internal combustion engine

All of the non-hybrids seem to plateau at about 6 l/100km (39 US MPG) with the diesels being somewhat better. As you point out, the hybrid Prius makes about a 25% improvement over a non-hybrid equivalent. My observation is that fuel engines are in that technological end-game, similar to the carburet...
by bga
Mon, 21 Nov 2011, 04:01
Forum: EV Motoring
Topic: Revenge of the internal combustion engine
Replies: 13
Views: 2887

Revenge of the internal combustion engine

In the Climate Spectator today: " ANN ARBOR, Mich (Reuters) - At the Chevrolet dealership here, customers want to see and touch the Volt, the gasoline-electric hybrid hailed by enthusiasts as the kind of innovation that could secure the future of General Motors. But they usually kick the Volt's tire...
by bga
Mon, 14 Nov 2011, 19:03
Forum: Electric motors and controllers
Topic: Another DIY Inverter - 125kVA
Replies: 15
Views: 5066

Another DIY Inverter - 125kVA

AN908 really only implements the motor control, all the peripheral stuff is up to the user.lication. Agreed. At last it turns the tricky core into more or less a commodity, leaving us the I/O, management and configuration sections to do. Just as well that the computrons haven't all been eaten by by...
by bga
Fri, 11 Nov 2011, 22:10
Forum: Electric motors and controllers
Topic: Another DIY Inverter - 125kVA
Replies: 15
Views: 5066

Another DIY Inverter - 125kVA

Speaking of letting the glue set, I built a biped robot some years ago that used a PC on the end of a serial lead to to do the dynamic balance and step control on the machine. It would be relatively simple to implement a remote control protocol over a serial line so these algorithms could be tested ...
by bga
Fri, 11 Nov 2011, 22:02
Forum: Electric motors and controllers
Topic: Another DIY Inverter - 125kVA
Replies: 15
Views: 5066

Another DIY Inverter - 125kVA

An anti-rollback feature sounds like a good idea. The effect would be that the vehicle will slowly creep backwards on the hill until the accelerator is pressed. You mean forward. Even an auto creeps forward up a hill. Backwards would be dangerous - unless you are in reverse... Definitely backwards....
by bga
Fri, 11 Nov 2011, 16:46
Forum: Electric motors and controllers
Topic: Another DIY Inverter - 125kVA
Replies: 15
Views: 5066

Another DIY Inverter - 125kVA

Hi David, Verrry impressive effort! I hope to be following your lead with the motor controller shortly. It's good to hear that AN908 is workable, although the code examples will need a lot of peripheral improvement to make them into a deployable system. I chickened out on the individual transistor i...
by bga
Fri, 11 Nov 2011, 15:23
Forum: General EV Discussion
Topic: Toyota Hybrid first edition what can be done
Replies: 52
Views: 14327

Toyota Hybrid first edition what can be done

Hor what it's worth,

I inquired about a battery pack for a prius a year or so ago. Toyota said a bit over $3K, but there are very few in stock and I didn't ask about age.
by bga
Sun, 06 Nov 2011, 19:56
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 402737

Weber and Coulomb's MX-5

Hi coulomb, I will likely have the same problem. Those boards in the EV200 are not very big. Would it be possible to quarantine the power supply for the contactors so that all the noise can be caught before it gets out onto the 12V bus? I was thinking a Pi filter on the battery side between the grou...
by bga
Thu, 27 Oct 2011, 19:58
Forum: Batteries, charging, management and monitoring
Topic: LiFePO4 batteries for an electric boat
Replies: 16
Views: 4189

LiFePO4 batteries for an electric boat

Thundersky cells are almost universal in road-going EV conversions around the country. EVWorks also has a controller for their cell-top BMSses to provide an undervolts lockout and charger control. As for the 12V battery block option, you will probably get more bang for your buck with individual cell...
by bga
Thu, 27 Oct 2011, 16:44
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 402737

Weber and Coulomb's MX-5

Hi Weber & Coulomb. I had a power steering pump that sounded a bit like that. The return oil cooler flexi line had become loose at the radiator and was sucking a bit of air (as well as dripping) It made the oil frothy like a milkshake and caused horrible noises to come from the pump, like it was abo...
by bga
Tue, 25 Oct 2011, 02:24
Forum: General EV Discussion
Topic: Zebra battery and U Caps
Replies: 14
Views: 3369

Zebra battery and U Caps

Nobody's used the glider term in a while... Since we're back on the capacitor discussion, the question should be "what benefit will they provide?" Since we already know that they are much lower in specific energy, but higher in specific power than batteries, the scope of the question should be about...
by bga
Sun, 23 Oct 2011, 00:11
Forum: AEVA WA Branch
Topic: Public Transport Centre charger up
Replies: 2
Views: 1409

Public Transport Centre charger up

One of Thomas Braunl's charge stations has appeared in the PTC car park. Those blue LEDs are really bright at night.

There are two bays located at the south end of the main building, near the Prospector train's platform.