Search found 76 matches

by cts_casemod
Thu, 06 Nov 2014, 07:53
Forum: General EV Discussion
Topic: Academic project - Research on motor feasibility
Replies: 1
Views: 382

Academic project - Research on motor feasibility

Hi folks, I'm sure some of you are academics or work in industry and perhaps could give me some advice. I converted a vehicle to electric which I took to a university exhibition last year. I was invited with a bit of short notice and therefore I managed to get some details of the conversion, inverte...
by cts_casemod
Thu, 06 Nov 2014, 07:23
Forum: Nissan Leaf
Topic: Fully Charged 2nd Gen - Nissan Leaf Norway
Replies: 2
Views: 827

Fully Charged 2nd Gen - Nissan Leaf Norway

Pretty hard to guarantee anything to 5 years, realistically. Here in the UK they give you the option to rent the battery tough. So if it fails they are responsible. But it depends on the mileage. For some users it might end up being more expensive I agree with the heater. I see no reason not to have...
by cts_casemod
Sun, 20 Oct 2013, 15:55
Forum: Batteries, charging, management and monitoring
Topic: Wanted - an amp hour meter
Replies: 69
Views: 11070

Wanted - an amp hour meter

Hi folks,

Does someone still have some spare PCB? I am looking to buy one.
Regards
by cts_casemod
Sat, 28 Sep 2013, 03:06
Forum: General EV Discussion
Topic: Cleaning messy wiring - Serial transmission
Replies: 12
Views: 1083

Cleaning messy wiring - Serial transmission

I have already. Several reasons: Autocad provides a full version for students The guys I use to do my laser cut only acept autocad files for the online quotations. It turns out really cheap compared to any other methods I had a view on Solid works, seems quite reasonable , but very expensive. Even t...
by cts_casemod
Fri, 27 Sep 2013, 12:35
Forum: General EV Discussion
Topic: Cleaning messy wiring - Serial transmission
Replies: 12
Views: 1083

Cleaning messy wiring - Serial transmission

I keep myself well busy :) Lectures apart (They require quite some effort here) last year I have been learning AutoCad. Strangely it is not part of out program, and I find that odd, since I often need to make all sorts or parts for my projects (To be CNC'd or Laser cutted) and I think it is a must f...
by cts_casemod
Fri, 27 Sep 2013, 11:47
Forum: Technical and conversion discussion
Topic: Conversion with industrial AC, claiming 150KW
Replies: 14
Views: 2703

Conversion with industrial AC, claiming 150KW

4 seconds 0 to 30mph does not seem quite impressive. My Polo (Similar size and weight) could do 6 seconds with the old 20KW setup. I don't doubt that the motor can reach a peak of 150KW, but at 144V seems quite unreasonable. Is it re-wired to 12VAC!?? If in fact it is, then 750Amps is not a lot, sin...
by cts_casemod
Fri, 27 Sep 2013, 11:34
Forum: Technical and conversion discussion
Topic: 144V DC DC converters
Replies: 12
Views: 1872

144V DC DC converters

Depends on your budget and what you need. For a simple DC-DC any server power supply can do. They have a built in Boost circuity and work from 90V (I tested some down to 60 with reduced output)and can provide 40Amps of power at 13.x Volts To actually charge the battery you can get away with an HP DP...
by cts_casemod
Fri, 27 Sep 2013, 11:16
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

Tuition fees... Same for everyone. The government stopped funding home students, so the rates are the same for home or European students. A bit more, maybe 1K a year for students from outside the CEE. I am paying £9K a year (15K AUD) How does this compare with universities over there? What about in...
by cts_casemod
Tue, 24 Sep 2013, 10:23
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

How does exactly the sponsorship works over there? Say I want to make an internship just for the sake of experience, earning just enough to pay for my everyday stuff, would this be easy to get by? Do you think the experience would be worth it? Thanks!! From what I hear, you can get by in Germany sp...
by cts_casemod
Tue, 24 Sep 2013, 01:52
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

There's plenty of work for people in our field, it's very much in demand, but you have to go where the work is. If you're picky about the field you want to be in (Renewables, Electric Vehicles), I'd say the hotbeds are Germany, the US, and Japan. GM is doing some work, but I think you'd have better...
by cts_casemod
Mon, 23 Sep 2013, 05:47
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

I'm an American living in Australia, obviously with a love for EVs. I'll be graduating with my bachelor degree in Mechatronics Engineering next year. Sadly, all indications are that if I want to be involved with EVs as a professional, I'll have to move back to the US. I had WANTED to stay in Austra...
by cts_casemod
Mon, 23 Sep 2013, 05:00
Forum: General EV Discussion
Topic: Cleaning messy wiring - Serial transmission
Replies: 12
Views: 1083

Cleaning messy wiring - Serial transmission

Those 20 wires are divided into 7 bits for a LCD (4 bits + control) going from the back to the from of the car, another 6 bits or so just with digital signals on the same direction and another 6 bits from on the opposite direction. So I would likely need something like 3 serial lines and one clock s...
by cts_casemod
Mon, 23 Sep 2013, 04:52
Forum: General EV Discussion
Topic: Cleaning messy wiring - Serial transmission
Replies: 12
Views: 1083

Cleaning messy wiring - Serial transmission

I thought about that, particularly useful as I could pick analogue signals/ have two way communication but I haven't studied microcontrollers yet :(
by cts_casemod
Sun, 22 Sep 2013, 16:13
Forum: General EV Discussion
Topic: Cleaning messy wiring - Serial transmission
Replies: 12
Views: 1083

Cleaning messy wiring - Serial transmission

Hi, I have a bunch of different signals traveling from different parts of the car. In short over 20 Wires with simple on/of signals that I would like to combine and transmit over a serial interface with 3 wires. There is a lot of information on serial to parallel, but what do I need to convert from ...
by cts_casemod
Sun, 22 Sep 2013, 15:55
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

Thanks Coulomb, judging by your posts you do seem to have a lot of knowledge on the electronics Area, do you work in engineering? Honestly, I had a not so good background working as a car mechanic/electrician and previously assembling prototypes for a company. I could never get to use all my skills ...
by cts_casemod
Sun, 22 Sep 2013, 11:30
Forum: The Lounge
Topic: Advice, starting a career in Australia
Replies: 10
Views: 1451

Advice, starting a career in Australia

Hi All, Since I am registered Here, I thought it could be a nice place to get some opinions about starting a career in Australia. I am currently undertaking a degree and I am not so sure about staying into the UK. I am looking at some engineering position, maybe power related (Electric Vehicles, Ren...
by cts_casemod
Thu, 15 Aug 2013, 09:53
Forum: Electric motors and controllers
Topic: Help to identify this motor?
Replies: 3
Views: 1081

Help to identify this motor?

My motor is very similar to that one, if you want to post some dimensions I can check if it is the same.

Mine is a 7.5KW 4 Pole 415. Its one of those that can be changed to 208.Image
by cts_casemod
Thu, 14 Mar 2013, 16:31
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39349

Johny's Electric Vogue

Great work! What mileage are you guys getting using direct drive? I am having bit of an issue as my VFD does not automattically change the V/Hz setting so regardless if I use the power or not it gives me a fixed voltage to a particular RPM and I am finding this to be draining the batery very quicly ...
by cts_casemod
Sun, 24 Feb 2013, 17:53
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39349

Johny's Electric Vogue

I can also command negative torque when the throttle is not pressed. Any way its not helping. I think the unit gets into overload and stops/starts regenerating accordingly Are you able to log data from your VFD ? It would be interesting to see what is going on with the DC bus voltage. You may be go...
by cts_casemod
Fri, 15 Feb 2013, 17:02
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39349

Johny's Electric Vogue

Thanks, I need advice on the encoder. I understand the differences between torque and speed control, the issue is that my unit is working in speed mode regardless of the torque vector setting being enabled. And Yes I need to be careful with the throttle and I need to know when I should release, othe...
by cts_casemod
Fri, 15 Feb 2013, 07:58
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39349

Johny's Electric Vogue

I was looking for some generic advice. My unit is set for torque, however I am 110% sure it is working in V/Hz. Its damaging the brackets as it goes from regen to acceleration and some other issues. Very rought drive. Its an Fuji AF300 15HP unit. I Plan to start with another unit soon. Its rated at ...
by cts_casemod
Thu, 14 Feb 2013, 11:23
Forum: Members Machines
Topic: Johny's Electric Vogue
Replies: 287
Views: 39349

Johny's Electric Vogue

Hi there, Thought you guys could help me out. I finished my AC conversion, however I am having issues with the VFD loosing sync after releasing the throttle to brake. I then have to let a car get to a very low speed in order to sync again. I was wondering what to use. I cant find much information on...
by cts_casemod
Fri, 25 Jan 2013, 02:42
Forum: General EV Discussion
Topic: make your own battery charger (austospeed article)
Replies: 4
Views: 802

make your own battery charger (austospeed article)

I am building a cheap HV charger based on a computer SMPS. Its only 300Watts but it is stackable as required (For my case 4x300W = 1.2KW to charge a 6.5KW 650V Battery. Mmbership required to check pictures Silly me, forgot the link http://forums.aeva.asn.au/smileys/smiley3.gif VW Polo Conversion
by cts_casemod
Mon, 24 Dec 2012, 16:05
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 386
Views: 50703

Low cost BMS

Most likely I will use the 6803. Its the same as the 02, but the chip may get the power from the master, so when the car is off there is no power consumption from the pack. I will be linking a battery gauge to have state of charge on each of the 4 modules I will be using. This way the charger may "k...
by cts_casemod
Mon, 17 Dec 2012, 21:50
Forum: Batteries, charging, management and monitoring
Topic: Low cost BMS
Replies: 386
Views: 50703

Low cost BMS

Been a while and I didn't see your last post until just now. You are right in that the output current of an optocoupler is proportional to the diode current, but when you see CTR figures like 100 - 300 % you realise that each one has to be calibrated. And then when you find that they drift all over...