Search found 676 matches

by 4Springs
Fri, 25 Mar 2011, 02:07
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

4Springs' Brumby

My motor has arrived! There are two small wires coming out of it, which I have decided are probably the "termal cut off" shown on the diagram. Kostov 17R diagram These wires are showing open circuit, so presumably they connect if the motor gets too hot. I wonder if I can find the wire that supplies ...
by 4Springs
Sun, 27 Feb 2011, 18:40
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

4Springs' Brumby

Thanks for the encouragement! I've been reading posts in this forum for some time, and I think that early posts from Thalass gave me the idea of converting the Brumby, although he hasn't done his yet... Then Goombi showed how it could be done. I considered buying the Stealth Brumby at one stage, but...
by 4Springs
Sun, 20 Feb 2011, 17:13
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

4Springs' Brumby

Yes, plan on keeping the clutch, for easier shifting of gears as suggested. It also makes the mounting of the motor that much easier. Haven't heard of a brass button clutch before, I'll have to look into that. you will have room under the tray for battery's climb under and have a look There is a bit...
by 4Springs
Sat, 19 Feb 2011, 17:09
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

4Springs' Brumby

The adapter plate and coupling looks easier than I imagined. As far as I can tell, I don't even have to remove the gearbox. http://forums.aeva.asn.au/uploads/1844/Left_Small.JPG http://forums.aeva.asn.au/uploads/1844/Right_Small.JPG I'm no mechanic, but I'm calling these parts (from left to right): ...
by 4Springs
Sat, 19 Feb 2011, 16:40
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

4Springs' Brumby

DKEL and I spent a couple of weekends (thanks Duane!) and removed the following: 10.5kg fuel tank (empty) + 1.3 misc fuel related bits + 8.1 exhaust - front + 4.1 exhaust - mid + 4.4 exhaust - rear + 1.8 other bits + 17.7 spare wheel, jack, bracket + 10.6 radiator (full) + 100 engine (estimate - my ...
by 4Springs
Sat, 19 Feb 2011, 02:33
Forum: Batteries, charging, management and monitoring
Topic: What size charger do I need?
Replies: 7
Views: 1541

What size charger do I need?

Ok, I've looked your reply for ages Matt, trying to figure this out. See if I have it correct. if you have a 140Ah AGM battery, and used 35Ah in an hour, then let it sit for 8 hours, you end up with remaining capacity somewhere around the C/5 capacity - the 35Ah you have used. When you say the remai...
by 4Springs
Sat, 19 Feb 2011, 02:18
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4897

Lead acid battery selection

This is going to sound like a retrograde step but if you must use lead acid batteries I'd recommend flooded cell batteries. NOW you mention it! But anyway, there were a few advantages that swayed my thinking: 1. Space - AGMS can be mounted on their sides, which fits my vehicle better. 2. Lower main...
by 4Springs
Fri, 18 Feb 2011, 02:24
Forum: Batteries, charging, management and monitoring
Topic: Lead acid battery selection
Replies: 20
Views: 4897

Lead acid battery selection

Ok, I've been doing research on Lead-Acid batteries, and thought I'd better share my results. This looks like a good place to post them! Most of the batteries are AGM. I am confident of the specs, but not the prices. Lots of the prices are from websites, and might change if you actually got a quote....
by 4Springs
Sat, 12 Feb 2011, 03:16
Forum: Batteries, charging, management and monitoring
Topic: What size charger do I need?
Replies: 7
Views: 1541

What size charger do I need?

Yes, I'm working on the calculation here - (written by Matt!) which gives me a theoretical range of about 60km. So driving 30km into work for the day should use half my charge? The C20 value of the battery is 140Ah. So if I have travelled 30km, presumably this means that there is a C20 value of 70Ah...
by 4Springs
Sat, 12 Feb 2011, 00:41
Forum: Batteries, charging, management and monitoring
Topic: What size charger do I need?
Replies: 7
Views: 1541

What size charger do I need?

I will have a bank of 12 x 12V 140Ah AGM lead-acid batteries. 12x12 = 144V. 144x140 = 20kWh. I will need to charge my vehicle in about 8 hours. But it won’t be fully discharged at that time. I’m guessing, but I think it’ll be about 50% discharged. So I need to charge 70Ah over 8 hours. 70/8 = 9 Amps...
by 4Springs
Wed, 09 Feb 2011, 02:57
Forum: Batteries, charging, management and monitoring
Topic: Keeping AGM Batteries Warm
Replies: 9
Views: 2674

Keeping AGM Batteries Warm

Thanks for those suggestions! My battery box will be in the tray of a ute, and there is a possibility of it getting wet. So the electric blanket is out on that count. The aquarium heater is an interesting idea. There is a good range on eBay, including a stainless steel one. Because they are so compa...
by 4Springs
Tue, 08 Feb 2011, 02:40
Forum: Batteries, charging, management and monitoring
Topic: Keeping AGM Batteries Warm
Replies: 9
Views: 2674

Keeping AGM Batteries Warm

I’m looking at ideas for battery boxes. I need to house 12 AGM batteries in my vehicle, and I’m concerned that they will get cold. The specifications for the batteries are all quoted at 25°C. If I’m using this vehicle for commuting, then the batteries would never be that warm in the morning. In wint...
by 4Springs
Sat, 29 Jan 2011, 02:44
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 316
Views: 57520

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: 316
Views: 57520

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: 3350

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: 316
Views: 57520

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: 3693

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: 316
Views: 57520

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: 3693

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: 316
Views: 57520

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: 316
Views: 57520

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: 316
Views: 57520

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: 3693

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: 3693

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: 3693

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...