Search found 2437 matches

by jonescg
Thu, 08 Dec 2011, 22:00
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

On the subject of precharge circuits: TTXGP has recently updated their technical rules section, and the requirement for the battery to be able to be completely isolated from the controller has been emphasised. This means my system of the resistor permanently wired to the contactor is no good. So I f...
by jonescg
Thu, 08 Dec 2011, 21:57
Forum: EV Racing
Topic: eFXC | TTXGP Australian Electric Motorcycle DVD
Replies: 1
Views: 1336

eFXC | TTXGP Australian Electric Motorcycle DVD

Nice one Andy! I will sling some cash your way :)
by jonescg
Sat, 26 Nov 2011, 01:32
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

Sorry for the confusion - That's cause there isn't any precharge circuit any more. Well, there is, but it's not very complicated. The precharge resister is permanently across the high voltage lugs of the main contactor (the red rectangle with a black circle [thanks MS Paint]). It seems to not do any...
by jonescg
Fri, 25 Nov 2011, 18:20
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

Hi Polmage, My wiring diagram is essentially as the Kelly diagram describes. I was trying a few different things for the pre-charge resister, mainly because I was worried that the controller being permanently powered up by the precharge resister would slowly drain the batteries. This doesn't appear ...
by jonescg
Tue, 11 Oct 2011, 02:25
Forum: AEVA WA Branch
Topic: Perth Branch Meeting
Replies: 9
Views: 2032

Perth Branch Meeting

Cheers Richo, I can't be there to take minutes as I'm in Canberra this week. Not the best weekend on track for me - crashed twice and blew up another (my last) motor :(
by jonescg
Wed, 05 Oct 2011, 19:26
Forum: AEVA QLD Branch
Topic: special meet Glen George Thursday night oct 6th
Replies: 1
Views: 754

special meet Glen George Thursday night oct 6th

Great to know Glen has made it this far!
by jonescg
Sat, 24 Sep 2011, 22:11
Forum: Scooters, mopeds and electric toys
Topic: Ebike Power limits, proposed legislation
Replies: 73
Views: 12972

Ebike Power limits, proposed legislation

Yep - that's why Kat loves her e-bike. 500 W motor is just the ticket Image
by jonescg
Wed, 21 Sep 2011, 01:24
Forum: Scooters, mopeds and electric toys
Topic: Ebike Power limits, proposed legislation
Replies: 73
Views: 12972

Ebike Power limits, proposed legislation

Seriously, what's the difference between a (big) e-bike and a (small) electric motorbike? 1. Rego 2. Greenslip / 3rd party insurance 3. Head, tail, brake lights + indicators 4. Horn 5. Type of Helmet 6. Leather vs Lycra 7. ? That's most of them, yep. Most* e-bikes struggle to exceed 50 km/h downhil...
by jonescg
Wed, 14 Sep 2011, 01:03
Forum: AEVA WA Branch
Topic: Brisbane AEVA Conference and Festival
Replies: 2
Views: 1059

Brisbane AEVA Conference and Festival

Would love to attend, but I will have spent my entire travel budget by then :) We'll make sure someone from WA appears on our behalf!
CHRIS
by jonescg
Mon, 12 Sep 2011, 23:31
Forum: General EV Discussion
Topic: Is the EV already obsolete?
Replies: 26
Views: 3219

Is the EV already obsolete?

I think there's a hackle right there Image
by jonescg
Sun, 11 Sep 2011, 17:20
Forum: General EV Discussion
Topic: Is the EV already obsolete?
Replies: 26
Views: 3219

Is the EV already obsolete?

After a weekend of racing at Winton, it dawned on me just how pointlessly inefficient the internal combustion engine was. I spend about $5.50 on electricity, while a Yamaha R1 used maybe $80 worth of premium. The 17 litre tank on the R1 contained within it ~170 kWh worth of energy, and was able to m...
by jonescg
Thu, 08 Sep 2011, 18:47
Forum: AEVA WA Branch
Topic: Perth Branch Meeting
Replies: 9
Views: 2032

Perth Branch Meeting

Hi All,
Just a reminder that the next Perth Branch AEVA meeting is on Tuesday evening (7 pm) in the Billings Room. See you there!
Chris.
by jonescg
Tue, 06 Sep 2011, 21:21
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

http://www.youtube.com/watch?v=bnd9gZHaWLY&feature=player_embedded http://www.flickr.com/photos/splinter/6114861079/in/set-72157627472257783/ I'll try as best I can to get something made from foam, but there's not a lot of time. You will notice I try to stand in front of the rude bit whenever a phot...
by jonescg
Tue, 06 Sep 2011, 18:46
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

Thanks Glenn! Great to catch up with you too. Yeah, a reliable bike is most of the battle at the moment. Convenient for me that Daniel had tech issues, but the outright battle for the year will happen in 5 weeks time. Massive thanks to Faz for building the tank cover for me - the bike looks a millio...
by jonescg
Sun, 21 Aug 2011, 03:59
Forum: AEVA WA Branch
Topic: Come see Glen off at Parliament House Sunday 11 am
Replies: 4
Views: 1705

Come see Glen off at Parliament House Sunday 11 am

Yep, tomorrow! Come along on your electric bike or car and see Glen George off as he travels around Australia in his electric MG! State transport Minister Troy Buswell will be there to say a few words too, so let's make sure he doesn't get in front of the camera for too long http://forums.aeva.asn.a...
by jonescg
Fri, 12 Aug 2011, 19:33
Forum: Batteries, charging, management and monitoring
Topic: Alternative to Headway cells
Replies: 22
Views: 3625

Alternative to Headway cells

LiPo from Turnigy will come in as the cheapest, most energy dense battery going. It's also a bit more dangerous. But a 7.5 kWh pack will barely weigh 60 kg, and the C rate is like 40 or something... The 5 ah pouches are about $11 each (3.7 V nominal). They are small format, so you can stack 'em, pac...
by jonescg
Fri, 12 Aug 2011, 01:54
Forum: Batteries, charging, management and monitoring
Topic: Alternative to Headway cells
Replies: 22
Views: 3625

Alternative to Headway cells

'Tis true, the cost is a major factor for many builds.
by jonescg
Thu, 11 Aug 2011, 20:16
Forum: Batteries, charging, management and monitoring
Topic: Alternative to Headway cells
Replies: 22
Views: 3625

Alternative to Headway cells

Paralleling cells to increase capacity doesn't change their charge/discharge characteristics at all, unless the capacities and internal resistances of the cells are way off. Provided these are all in spec, then you can put as many in parallel as you like. If you're building a bike, then I'd say don'...
by jonescg
Wed, 10 Aug 2011, 23:04
Forum: Batteries, charging, management and monitoring
Topic: Alternative to Headway cells
Replies: 22
Views: 3625

Alternative to Headway cells

Pouch cells (the flat ones) are always going to be better in the long run, in my opinion as they offer more energy density on a volume basis. The C rates are going to be a bit higher than cylindrical cells, but the higher the capacity of the cell the lower the C rate will be. But $35 US each for a 2...
by jonescg
Sat, 06 Aug 2011, 02:05
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

Hot diggity! Hope it's in good shape, and better yet, cheap!
by jonescg
Sat, 06 Aug 2011, 00:21
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

by jonescg
Sat, 06 Aug 2011, 00:03
Forum: Members Machines
Topic: Voltron, the Electric RG!
Replies: 142
Views: 26618

Voltron, the Electric RG!

Hi Faz, I have finished the basic shape of the metal tank with bog. What should I do now? Coat it in some kind of epoxy to make it as smooth as possible? Spray putty? It's pretty close, and I'd like to get it done soon so I can send it over east. PM me when you are ready to help out. Cheers, CHRIS
by jonescg
Tue, 02 Aug 2011, 00:50
Forum: Electric motors and controllers
Topic: 2 BLDC motors 1 controller..?
Replies: 12
Views: 3808

2 BLDC motors 1 controller..?

Well from my experience running two brushed DC motors in parallel is difficult, especially when they might not be perfectly matched. I burned out two motors at Eastern Creek because if this unmatched dilemma. I have conversed with Roman Sunsik from EMRAX motors, and he indicated that while two of hi...
by jonescg
Mon, 01 Aug 2011, 20:19
Forum: Electric motors and controllers
Topic: 2 BLDC motors 1 controller..?
Replies: 12
Views: 3808

2 BLDC motors 1 controller..?

I assume this means the phase wires would be wired in parallel?
by jonescg
Fri, 22 Jul 2011, 17:58
Forum: Batteries, charging, management and monitoring
Topic: Li-Ion Battery-Higher Energy density than LiFePO4
Replies: 14
Views: 1581

Li-Ion Battery-Higher Energy density than LiFePO4

Technically, the Ampere is one Coulomb of charge per second.

For nerd purposes only, a Volt is one Joule per Coulomb, and an Ohm is a Joule second per coulomb squared.