Search found 985 matches

by Electrocycle
Wed, 06 Jul 2011, 04:42
Forum: Electric motors and controllers
Topic: Vehicle Variation
Replies: 15
Views: 2232

Vehicle Variation

the range would decrease if you drive faster :)
ie more current available means more power, so if you go up hills faster you'll be using more from the batteries.

the 96v motor will work fine at 120v, so a 120v battery pack and controller will add range as well as performance.
by Electrocycle
Wed, 06 Jul 2011, 04:33
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

I've used these before: http://jaycar.com.au/productView.asp?ID=MB3612&form=CAT2&SUBCATID=998#3 There's a 24v / 6A version, so two of those could be an option They're a lot cheaper if you know someone with a wholesale account :) This sort of thing could also work: http://jaycar.com.au/productView.as...
by Electrocycle
Wed, 06 Jul 2011, 03:12
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

ah yes, I was thinking more along the lines of mounting the chargers onboard and permanently wired to the batteries - so you just plug in the power cable. You could probably use 6 to 10A chargers for overnight charging, so they'd be pretty cheap and small. A series resistor on the throttle wiper mig...
by Electrocycle
Wed, 06 Jul 2011, 02:54
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 90415

EV2Go's - Lithium Powered Trike

maybe the forks are just dampers?

Changing the trail under compression might be a good thing - if it's done right.

It could also be an extra complex way of achieving the same result - classic BMW!
by Electrocycle
Wed, 06 Jul 2011, 02:10
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

sounds good :) It might be worth checking if the "turbo" function on the controller is configurable - to limit rpm (voltage) instead of current. With the battery charging, I'd use 4 x 12v chargers or 2 x 24v chargers. They're cheaper than buying a 48v charger - and it'll keep the batteries in balanc...
by Electrocycle
Wed, 06 Jul 2011, 01:06
Forum: Members Machines
Topic: Obsolete Thread
Replies: 576
Views: 90415

EV2Go's - Lithium Powered Trike

it seems to work, and apparently reduces dive under brakes
by Electrocycle
Thu, 30 Jun 2011, 23:09
Forum: The Lounge
Topic: Worlds Oldest Lightbulb
Replies: 2
Views: 1107

Worlds Oldest Lightbulb

or wind the voltage up and see how bright it can go before it blows :P
by Electrocycle
Thu, 23 Jun 2011, 22:44
Forum: Members Machines
Topic: gholm's Morris J2 Van- 1966
Replies: 187
Views: 46872

gholm's Morris J2 Van- 1966

I think a lot of wiper motors are wound field, but they often use two sets of brushes for a timing change to do the two speeds - which won't work so well with reverse polarity if it's a permanent magnet motor. Personally I'd convert to negative ground just to avoid issues with using any automotive e...
by Electrocycle
Thu, 23 Jun 2011, 04:48
Forum: Members Machines
Topic: gholm's Morris J2 Van- 1966
Replies: 187
Views: 46872

gholm's Morris J2 Van- 1966

are you going to convert to negative ground?

It'd be very easy to do since you're rewiring things anyway (about the only thing you'd have to change is the wiper motor possibly) and will make the fitting of any other 12v devices much easier in future.
by Electrocycle
Mon, 20 Jun 2011, 04:49
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 1995

Kelly Brushless Setup Problems

good luck with it :)
by Electrocycle
Mon, 20 Jun 2011, 01:07
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 1995

Kelly Brushless Setup Problems

aha, good stuff :)

Won't be long till you have the thing driving around!
by Electrocycle
Sun, 19 Jun 2011, 05:49
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 1995

Kelly Brushless Setup Problems

with no load on it there shouldn't be a voltage drop issue.
It should also draw the same current in both directions.

In my old bike I was running the motor backwards the whole time :)
by Electrocycle
Sun, 19 Jun 2011, 04:40
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

It's possible.

Definitely sounds like you'll need to talk to Kelly about it.

There's a chance that the sensors have been installed in the wrong position in the motor, but it seems unlikely.
It should run the same in both directions, apart from the fan noise.
by Electrocycle
Sun, 19 Jun 2011, 04:38
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 1995

Kelly Brushless Setup Problems

if it's all working 100% it should be smooth and seamless in forward or reverse. The brushless motors do sometimes get a bit "coggy" when starting from low speeds with high load and power, but I never found it to be a problem. It should still be able to put out full torque on start up without lockin...
by Electrocycle
Sun, 19 Jun 2011, 03:59
Forum: Electric motors and controllers
Topic: Kelly Brushless Setup Problems
Replies: 11
Views: 1995

Kelly Brushless Setup Problems

The brushless motors and controllers should handle the loads fine.
I've used a very similar setup in a motorcycle before.

There must be something wrong with the setup to cause that issue.
by Electrocycle
Sun, 19 Jun 2011, 03:58
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

it should never get into that situation, unless the sensors are in the wrong positions.

Is it possible that the sensors are connected in the wrong order?
by Electrocycle
Sun, 19 Jun 2011, 03:05
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

The only thing I'd expect to cause that is excessive voltage drop on the supply side from the battery to the controller, or maybe interference causing the controller to crash / reset.
by Electrocycle
Tue, 31 May 2011, 00:22
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

I haven't bought any like that, but I'm sure they exist.
Worst case you could have some hubs made up to fit standard universals.

I'd be visiting a bearing shop with some of the parts and seeing what they have to suit.
by Electrocycle
Sun, 29 May 2011, 17:36
Forum: Electric motors and controllers
Topic: ADC/Curtis-reduced torque at start up?
Replies: 21
Views: 4829

ADC/Curtis-reduced torque at start up?

the freewheel diodes usually seem to fail to short circuit, and then spectacularly destroy all the FETs as well as themselves... The Curtis is pretty old school analogue circuitry, so it's hard to work out exactly what's going wrong because a small problem can cause everything to look slightly out o...
by Electrocycle
Sun, 29 May 2011, 17:31
Forum: Members Machines
Topic: Next project
Replies: 36
Views: 5656

Next project

jpcw wrote:Am I completely nuts? :)
yes!

But you are not alone :P

viewtopic.php?t=1691
by Electrocycle
Sat, 28 May 2011, 23:27
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

A long shaft should be ok as long as everything is well aligned and mounted.
You could probably use the original universal joints and a section of the original shaft.
by Electrocycle
Wed, 18 May 2011, 03:09
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

ideal would probably be to run 3 contactors, but shouldn't be necessary. I'd just run one contactor from one controller. Whether to use 48v or 12v coil depends on the controller specs. If it just switches battery voltage to the coil you'll want 48v, but it might do PWM so you can use 12v. Running al...
by Electrocycle
Sun, 15 May 2011, 14:20
Forum: Members Machines
Topic: gholm's Morris J2 Van- 1966
Replies: 187
Views: 46872

gholm's Morris J2 Van- 1966

those front springs are huge!
by Electrocycle
Fri, 13 May 2011, 13:45
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

sounds like a job well done on the hydraulics :) The R/C brushless motors are good value for the power they make, but they're not very robust, run at high rpm, and the controllers don't like starting up under load so I don't think they'd be suitable for this application. You really need to over engi...
by Electrocycle
Fri, 06 May 2011, 03:30
Forum: Technical and conversion discussion
Topic: Convert 1975 Afron Cherrypicker?
Replies: 143
Views: 20352

Convert 1975 Afron Cherrypicker?

yep, better to have oversized motors than undersized :)