Search found 564 matches

by 4Springs
Sat, 29 Jan 2011, 02:44
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

"Before" photos! This is the vehicle. That bullbar looks heavy... You can see the garage behind, and some of the "stuff" I'll be competing with for room. http://forums.aeva.asn.au/uploads/1844/Brumby.JPG Hmmm. This'll have to go. http://forums.aeva.asn.au/uploads/1844/Engine.JPG The spare wheel fits...
by 4Springs
Sat, 29 Jan 2011, 02:27
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

I received “approval in principle” from the government. This is a letter that basically says they are ok with the concept. It tells me I have to go and talk to an Approved Engineering Signatory (AES) beforehand. It also says that I have to complete the conversion in 6 months(!), or else I’ll have to...
by 4Springs
Wed, 12 Jan 2011, 13:23
Forum: Technical and conversion discussion
Topic: Poor Man's Regen. air con.
Replies: 20
Views: 2713

Poor Man's Regen. air con.

I wonder how much braking you'd get from an alternator, charging a 12V accessories battery? Looking at the new NCOP14, section 2.12.1 seems to suggest a preference for a battery for the 12V system. So I could install a small 12V battery, with an alternator connected to a spare shaft on the electric ...
by 4Springs
Thu, 06 Jan 2011, 00:29
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

Motor & Controller I worked out that I'd need about 20kW to run my vehicle at 100km/h on a flat road. So I'll need a motor that will do at least 20kW without overheating. After some discussion here , I've tentatively decided on the Kostov 17R. This will handle 30kW continuously, and has heaps more ...
by 4Springs
Wed, 05 Jan 2011, 02:30
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

That's the charger, but they do controllers as well. I've had a bit of a surf since, and found opinions that they are very cheap, and you get what you pay for! Comments along the lines that the chargers & DC-DC converters are ok, but the controllers aren't much. Did you buy the charger direct from t...
by 4Springs
Wed, 05 Jan 2011, 02:19
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

Yes please, posts most welcome! I had a look at your blog Mal, and soon realised that this was where I had seen the zener balancing! So I've now bookmarked it, to go back and study later. From those replys, it looks like the 20kWh battery pack might not be up to the 80km trips, even if they were ver...
by 4Springs
Wed, 05 Jan 2011, 01:44
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

This has made me look up the Chennic website now.
Any comments on their controllers? I don't see any prices...

Christopher.
by 4Springs
Tue, 04 Jan 2011, 02:32
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

Battery I think I’ll use AGM lead-acid batteries. These are my reasons: •     Cheap •     Readily available •     Low maintenance – they need no Battery Management System, and (presumably) no equalization charging •     No free acid to spill out in a crash •     Can be mounted in any direction •   ...
by 4Springs
Tue, 04 Jan 2011, 01:51
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

Requirements I will mainly use this vehicle to travel to work and back – a distance of 15 km one way. I hope to convince them to allow charging at work. I’d also like to also use this vehicle for less frequent trips to our nearest city. This is 30 km via a hilly, windy road, or 40 km via a much fla...
by 4Springs
Tue, 04 Jan 2011, 01:34
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 39752

4Springs' Brumby

We have a Subaru Brumby which has been with us for some time. Our mechanic says that the engine is about kaput, and we need to decide what to do with it. My wife is very attached, and so she is somewhat receptive to the idea of giving it a new lease of life as an electric vehicle. I suppose I'd bett...
by 4Springs
Sun, 02 Jan 2011, 23:10
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

Thanks for that Matt, you've given me some research to do. <goes away for a few hours and Googles things...> so controllers that can do 300A continuously: zilla 1k LV (350A cont) soliton1 (700A+ cont) kelly 156v 800A controller (~350A cont) steer clear of both logisystems and curtis. The 'zilla does...
by 4Springs
Sun, 02 Jan 2011, 17:46
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

Thanks for your reply Bruce, I've been struggling with these calculations for a few days now... Using about 25kWh per 100km is probably a safe estimate of the performance of the brumby, allowing for speed, controller and motor losses. It will worse with the tractor on the back. I'd agree to 25 kWh @...
by 4Springs
Sun, 02 Jan 2011, 01:41
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

Thanks Matt, that has answered a few niggles about those graphs. The Kostov graph seems more professional than the others, which is an influence towards choosing that brand! So for the comparisons in the previous post, it looks like I’d choose the Kostov for a good range (lower current at a given po...
by 4Springs
Sat, 01 Jan 2011, 23:42
Forum: Electric motors and controllers
Topic: Which Series DC Motor to Choose?
Replies: 11
Views: 3170

Which Series DC Motor to Choose?

I'm planning to convert a Subaru Brumby, approx 1300 kg total weight (with batteries). I’d like to be able to go 100 km/h, which I think will require about 20 kW on a level surface. So I’ll need to be able to run at 20 kW for a time (say ½ hour) without overheating. I’d like to have a lot more power...