Search found 219 matches

by Renard
Fri, 31 May 2013, 01:46
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

During my test run up and down the road the other day, I was too nervous to observe everything accurately, so I want to renew the test drives asap after I've fixed the faults that emerged. 1. The motor fan failed to come on, and when I checked the motor temperature ten minutes after coming home, it ...
by Renard
Tue, 21 May 2013, 01:20
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

A BIG DAY! The car is reborn and has escaped from the shed. I'm reminded of a little verse by Ogden Nash: Deep in the study of eugenics There lies that fabled fowl the phoenix, It lays one egg, not ten or twelve, And when it's hatched out pops itselve. I drove up and down the road, up to about 80km/...
by Renard
Tue, 21 May 2013, 00:27
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Thank you folks for the help on the IGBTs. But I want to get this car registered before 26th June when the three months grace after the rego expiry is up. So I'm going for the contactor rather than continue experimenting. Since I don't need PWM, and I don't need to control the heat other than on/off...
by Renard
Mon, 20 May 2013, 01:07
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

When you say you placed a 0.47uF accross the IGBTs - whay do you mean by that? With my limited understanding of electronics, I was thinking that the caps should be across the switches as they are in AC equipment. They were from collector to emitter. However, I was having the same trouble before I p...
by Renard
Sun, 19 May 2013, 21:58
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Engine connector file saved, though I'm not sure how applicable to my 1992 E36 it'll be. Thanks for putting in the effort though! You're welcome. I need a little help with my IGBTs please. I followed Johny's heater control circuit, except that I used two IGBTs (one for each side) and 600V 40A ones ...
by Renard
Sat, 18 May 2013, 23:46
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Except for a little tidying up, I've completed the under-bonnet wiring. The first photo shows the auxiliary box, of which I can't say I'm at all proud. Some parts were made ages ago and I would do things differently if I felt I had the time to re-work it. But when I look at the entrails BMW have stu...
by Renard
Mon, 13 May 2013, 00:29
Forum: Technical and conversion discussion
Topic: Some "don'ts" for EV building
Replies: 60
Views: 11509

Some "don'ts" for EV building

Higher voltage has its limits Something around 320-360 V (100-108 cells) is a reasonable figure for AC conversions. Another small advantage of this voltage is that off-the-shelf DC/DC converters designed to accept 240V AC can be used without modification. An RMS of 240V AC implies a wave peak of 33...
by Renard
Sat, 11 May 2013, 21:56
Forum: Technical and conversion discussion
Topic: Some "don'ts" for EV building
Replies: 60
Views: 11509

Some "don'ts" for EV building

Record wiring details as you go

Seems obvious, but more than once I've had to pull things apart because I forgot sometimes to write down what wire was going where.
Even if you complete a module in one blow, you may have to go back to it for revision.
by Renard
Fri, 10 May 2013, 15:59
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

…. I learned a lot reading this thread... . I have learned much from others on this forum, and so although a major part of the reason for writing up this account was for my own record, I'm pleased that others find it useful too. This is what makes a community. (Administrator, please receive a bow.)
by Renard
Fri, 10 May 2013, 00:37
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Yes, indeed it does. I've run it off 60V, rear wheels off the ground.
Tomorrow I'll run it from the full 374V.
by Renard
Thu, 09 May 2013, 23:55
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

At last, after an intense burst of many days of work, all the cells are in and the BMS installed and working. All the HAZV cabling is in place and the WaveSculptor wired up and plumbed in. Of course there were the usual problems of pieces not quite fitting in place, bolts in hard-to-fix positions, w...
by Renard
Sun, 05 May 2013, 03:16
Forum: Technical and conversion discussion
Topic: Engineer requests
Replies: 28
Views: 4834

Engineer requests

You must comply with the appropriate ADRs. Consulting the 3rd Edition Australian Design Rules, Number 43.3 at http://www.comlaw.gov.au/Details/F2006L02743 I read: 43.3.2.                          Engine Number An identification number shall be legible and permanently stamped, laser engraved, cast or...
by Renard
Mon, 22 Apr 2013, 17:18
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Step by step -- progress. Yesterday I wired up the front, lower 16-cell box, and this morning I hoisted it into place. I decided to assemble this box out of the car for ease of work, and that was a good decision. It dropped in quite nicely. It's held in position with four M10 bolts into threaded, r...
by Renard
Sun, 21 Apr 2013, 15:00
Forum: Batteries, charging, management and monitoring
Topic: Wanted - an amp hour meter
Replies: 69
Views: 11606

Wanted - an amp hour meter

Now, I'm concerned that the grounds are going to be shared - that is the negative terminal of my auxiliary battery will be connected by a convoluted length of copper to the negative of the high voltage pack. Not ideal, but really, how else can you safely measure the voltage of your pack? In idle mo...
by Renard
Mon, 15 Apr 2013, 22:13
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Umm, no, not sure. Clear, rigid stuff from the hardware store.

Edit: 22 April. Yes, it's acrylic. Seems adequate just as a cover.
by Renard
Mon, 15 Apr 2013, 18:30
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Following on from Weber's comment about dodgy Chinese DC circuit breakers, I found an explanation of the markings on polarised units, which made clear how they should be wired -- which is not entirely apparent from the little + and - signs on the breakers themselves. Doing some web research, I found...
by Renard
Tue, 09 Apr 2013, 00:23
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

BigMouse wrote:

I'll be using much smaller cells than you. 114 CA70FI cells.


70? I didn't know there was such a beast. But CA60 cells are 245mm high. They would have to go on their sides unless you chop the rear seat base out.
by Renard
Mon, 08 Apr 2013, 20:53
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

The P3 post says they're all 240mm tall. Does this fill the entire space available under the seats? Is there any space left to expand the boxes toward the rear at all? The height of 240mm is the most that would allow the bottom of the boxes to be flush with the floor panelling. One box is 480mm lon...
by Renard
Mon, 08 Apr 2013, 19:18
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

I have now installed the two under-seat boxes. I jacked up the car, positioned the boxes roughly underneath their correct place, attached nuts to two of the fixing studs that suspend the boxes from the seat base, and connected two lengths of M8 threaded rod to the nuts. The rods passed through the m...
by Renard
Fri, 05 Apr 2013, 21:42
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

I had a little trouble with the Driver Controls Unit recently. I had successfully loaded the Weber-modified program, but somehow I managed to disturb - I've no idea how - a component within it. But James fixed it for me. Great support! Now I have been running the firmware through Tritium's DCTest pr...
by Renard
Thu, 04 Apr 2013, 23:38
Forum: Electric motors and controllers
Topic: AC drive programming and pedal mapping
Replies: 67
Views: 12326

AC drive programming and pedal mapping

Weber has kindly made the re-writes of the code for me to load into my Tritium Driver Controls Unit. After some hiccups, I have got the code compiled and into the DCU. I can report that according to Tritium's DCtest program it seems to be working as it should. For example: http://forums.aeva.asn.au/...
by Renard
Wed, 03 Apr 2013, 02:09
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Hi Weber, I have just realised you have posted here -- thanks for your detailed responses, always helpful. Weber wrote: "In our engineer's case, not cutting out the tyre well (or boot floor) was about the bracing it supplied between the chassis rails rather than the spare tyre. He's fine with a "pat...
by Renard
Mon, 25 Mar 2013, 16:19
Forum: Members Machines
Topic: Weber and Coulomb's MX-5
Replies: 1698
Views: 342485

Weber and Coulomb's MX-5

coulomb wrote:

* 99% completed

Ahh that last 1%.

That is a delicious photo. It looks like my wife's suitcase before a trip -- just before I'm asked to sit on it to get it to close.
More strength to your backside!
by Renard
Mon, 25 Mar 2013, 02:09
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

Something I haven't reported yet, but made some time ago, is the gear select mechanism. I realised that the front ashtray made an excellent spot for the controls. (The two little screws in the lower RH corner are to hold the ashtray cover fixed.) http://forums.aeva.asn.au/uploads/1659/P1010178.jpg T...
by Renard
Thu, 14 Mar 2013, 17:32
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28807

Renard's BMW

So I will re-arrange things so that the BMS charger control circuit is wholly powered by the charger's 0V and 12V, and that this also controls a relay (which operates the contactor circuit) via an isolating device. Then of course I have also to have isolators for the actual BMS master switching out...