Search found 985 matches

by Electrocycle
Wed, 04 May 2011, 23:17
Forum: Electric motors and controllers
Topic: RX400H transaxle
Replies: 169
Views: 21990

RX400H transaxle

if you put some wheels on it you can run it on any normal chassis dyno, or you could use a hub dyno.
by Electrocycle
Fri, 29 Apr 2011, 02:33
Forum: EV Racing
Topic: E-Formula Extreme - Sydney presentation
Replies: 64
Views: 11210

E-Formula Extreme - Sydney presentation

only required if he doesn't demagnetise his rotor :)
by Electrocycle
Thu, 28 Apr 2011, 23:26
Forum: EV Racing
Topic: E-Formula Extreme - Sydney presentation
Replies: 64
Views: 11210

E-Formula Extreme - Sydney presentation

will there be official timing on the electric bikes on the weekend?

Just seeing how safe my Wakefield lap record is :)
by Electrocycle
Thu, 28 Apr 2011, 05:47
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 40634

seligtype3 1969 Volkswagen Type 3

yep, whole pack with the BMS, but with the charge current low enough that it can be run indefinitely until all cells are at 100%
by Electrocycle
Thu, 28 Apr 2011, 05:30
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 40634

seligtype3 1969 Volkswagen Type 3

just keep an eye on them with a multimeter :)

Charging them all up individually is probably not a bad idea anyway at some point, but otherwise if you can get the whole BMS on and working you should be able to rig up a balance charge (it'll be very slow though!)
by Electrocycle
Thu, 28 Apr 2011, 04:40
Forum: Members Machines
Topic: seligtype3 1969 Volkswagen Type 3
Replies: 194
Views: 40634

seligtype3 1969 Volkswagen Type 3

I have found that the TS cells hold charge for long periods with no issues as long as the BMS modules are not installed.

You should be fine to leave them until the pack is built, then do a balancing charge.
by Electrocycle
Mon, 25 Apr 2011, 18:58
Forum: Technical and conversion discussion
Topic: Pre Charge Resistor
Replies: 30
Views: 5050

Pre Charge Resistor

it usually only takes a few seconds.
You could go to a smaller value precharge if you need to (100ohms or so)
by Electrocycle
Mon, 25 Apr 2011, 17:41
Forum: Electric motors and controllers
Topic: ADC/Curtis-reduced torque at start up?
Replies: 21
Views: 4835

ADC/Curtis-reduced torque at start up?

quick search on google found this: http://youtu.be/afuMg2Jmilo


As you can see, a bunch of caps in the middle of the heatsink.
From memory they are about the size TJ mentioned.
by Electrocycle
Mon, 25 Apr 2011, 01:29
Forum: Electric motors and controllers
Topic: ADC/Curtis-reduced torque at start up?
Replies: 21
Views: 4835

ADC/Curtis-reduced torque at start up?

The end covers are cast in place, but if you get them loose (people use heat guns / hot water / hammer, etc) you can pull the board out reasonably easily.
There are a lot of screws on the bottom, under a cover plate / sticker from memory, securing the heatsink to the case.
by Electrocycle
Sat, 23 Apr 2011, 19:12
Forum: EV Racing
Topic: Newcastle Xprize
Replies: 15
Views: 4840

Newcastle Xprize

maybe it's meant to be a max 1.2m eyeline?

Pretty much every electrathon vehicle is out of the running if it's minimum 1.2m

I've sent an EOI, and should be able to field a "demonstration class" motorbike, and a single seater vehicle.
by Electrocycle
Wed, 06 Apr 2011, 00:38
Forum: EV Racing
Topic: Newcastle Xprize
Replies: 15
Views: 4840

Newcastle Xprize

could be fun!
by Electrocycle
Mon, 04 Apr 2011, 03:56
Forum: Technical and conversion discussion
Topic: synthetic transmission oil-educate me!
Replies: 22
Views: 5204

synthetic transmission oil-educate me!

Some manual gearboxes use auto trans fluid from the factory, and I've heard of people using it in other boxes without issues.

It's still an extreme pressure lubricant, but much lower viscosity.
by Electrocycle
Wed, 09 Mar 2011, 00:56
Forum: EV Racing
Topic: Burnouts in an electric drag car
Replies: 25
Views: 4668

Burnouts in an electric drag car

you need a fast rpm monitor :P

The motor won't keep accelerating if it's not getting power!
by Electrocycle
Tue, 08 Mar 2011, 21:52
Forum: EV Racing
Topic: Burnouts in an electric drag car
Replies: 25
Views: 4668

Burnouts in an electric drag car

it's very simple to add a module that monitors the rpm and either connects to an input on the controller to cut the power, or could actually adjust the throttle signal to maintain peak rpm under varying loads if necessary.
by Electrocycle
Tue, 08 Mar 2011, 03:31
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

yep, exactly right.

There is no way around it needing X amount of power to move its weight up a certain incline, or over soft ground, etc at a given speed.
by Electrocycle
Tue, 08 Mar 2011, 03:29
Forum: Members Machines
Topic: Andrew's Electrocycle
Replies: 21
Views: 4036

Andrew's Electrocycle

Direct drive is fine as long as you have 72v or so to run the motor (to get decent rpm out of it for top speed without the gearing being too tall)
by Electrocycle
Sat, 05 Mar 2011, 03:46
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

yep, you definitely need to go a bit overkill I think to make sure it'll be usable. It's no use having to do it twice! It might even be worth doing a temporary installation with a motor to test how well it'll work. I'm not sure if anyone has one kicking around any more, but it might be possible to f...
by Electrocycle
Sat, 05 Mar 2011, 01:33
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

so I'll have to see if there's some kind of ramping option in the speed controller. Yep, the controllers generally have ramping options and different levels of braking, so you can make it slow down nicely or output zero torque to let it spin down nicely. I think it would require a bit of tuning to ...
by Electrocycle
Fri, 04 Mar 2011, 12:45
Forum: Members Machines
Topic: Andrew's Electrocycle
Replies: 21
Views: 4036

Andrew's Electrocycle

Once you go to 50km range and 80km/h top speed things get a bit more expensive, but it's easier now than it was when I built this one. If you can do all the work yourself you should be able to do it for under $5k It would be possible to do a 250 size bike with lithiums, or a larger bike with lead ac...
by Electrocycle
Fri, 04 Mar 2011, 12:39
Forum: Technical and conversion discussion
Topic: Motorbike conversion speculation
Replies: 14
Views: 2493

Motorbike conversion speculation

LAMS is actually a list of approved bikes, not just a power to weight ratio thing, so it may be difficult to get anything larger approved. I think it may come down to who you talk to when you register it. Hopefully it's possible - but then part of the LAMS requirements are to do with the weight, to ...
by Electrocycle
Tue, 01 Mar 2011, 21:59
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

that's a good starting point though, and about what I'd expect, having played with similar things before. You really can't be sure about the power required until you actually do it, but it's always better to have more than you need available :) The Mars motors are cheaper than most other options any...
by Electrocycle
Mon, 28 Feb 2011, 16:14
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 90518

EV2Go's - Lithium Powered Trike

Sounds like you need some sort of splined coupling
by Electrocycle
Sun, 27 Feb 2011, 22:34
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

it'd definitely be a totally different experience with electric power!
by Electrocycle
Sun, 27 Feb 2011, 04:40
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20374

Convert 1975 Afron Cherrypicker?

it's the torque that's amplified by the gear ratio, but the rpm is divided.
Power is torque x revs, so the power is the same (minus losses)

So basically, 1hp in is 1hp out, just at a lower speed.
by Electrocycle
Sun, 27 Feb 2011, 04:36
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 90518

EV2Go's - Lithium Powered Trike

Trantorques do seem to work pretty well. It's basically like a taperlock but with a single nut to tighten in.