Search found 494 matches

by evric
Sun, 09 Nov 2014, 16:11
Forum: Batteries, charging, management and monitoring
Topic: Digital ammeter setup
Replies: 21
Views: 3650

Digital ammeter setup

That's it...
by evric
Sun, 09 Nov 2014, 04:46
Forum: Batteries, charging, management and monitoring
Topic: Digital ammeter setup
Replies: 21
Views: 3650

Digital ammeter setup

I was suggesting resistors A, B and C all in series across the shunt. The ammeter is fed from where the resistor A connects to the shunt (on the LOAD side) and the other side directly from the wiper of the pot. "A" is 8K2 (8.2K ohm) "B" is the 5k trim pot and "C" is the 3K3 (3.3K ohm) resistor.The t...
by evric
Sat, 08 Nov 2014, 22:39
Forum: Batteries, charging, management and monitoring
Topic: Digital ammeter setup
Replies: 21
Views: 3650

Digital ammeter setup

Hi Chris, For the ammeter, place a voltage divider across the current shunt. Say, a 5K (or equiv combo) and a 10k resistor in series and have your meter across the 10K resistor. Or if you want to calibrate it: 3K3 (3.3K ohm) in series with a 5k trim pot and then a 8K2 (8.2K ohm) resistor, connecting...
by evric
Fri, 07 Nov 2014, 21:33
Forum: For Sale/Wanted
Topic: Zivan NG3 LiFePo4 36cell Charger - For Sale
Replies: 0
Views: 248

Zivan NG3 LiFePo4 36cell Charger - For Sale

Mic Chapman (AEVA Adelaide) has a Zivan NG3 LiFePo4 36cell Charger for sale. see full details here: Zivan 35cell LiFePO4 Charger - On Gumtree This is brand new - still in the box (so to speak). This was programmed for 36 LiFePO4 cells (would suit 90Ah/100Ah with out adjustment. The output voltage ha...
by evric
Mon, 03 Nov 2014, 16:37
Forum: Batteries, charging, management and monitoring
Topic: Problem TC Charger
Replies: 30
Views: 4013

Problem TC Charger

You mentioned that you measured all the cells that you could get to. You really need to access all of the cells to know what's going on. All you need is one cell to be cactus and that will upset the charger, as they are all in series. This is a major problem which requires access to all cells and m...
by evric
Mon, 03 Nov 2014, 16:08
Forum: Batteries, charging, management and monitoring
Topic: Problem TC Charger
Replies: 30
Views: 4013

Problem TC Charger

TC Charger/Elcon LED Indicators To clear up the LED indications... The LED flashing sequences in the TC Charger specs are ERROR messages only. The indications while charging are: What are the normal LED colors on the Elcon PFC charger? When the Elcon PFC charger is operating normally, it will blink ...
by evric
Mon, 03 Nov 2014, 12:20
Forum: Batteries, charging, management and monitoring
Topic: Problem TC Charger
Replies: 30
Views: 4013

Problem TC Charger

... the batteries were very low having sat for 1 year being only connected to BMS cell modules. ... Hi Jonathan, I think you'll find the charger is probably OK and the problem will be with the lithium cells. Having the BMS modes connected for a year has flattened them, possibly below the minimum vo...
by evric
Sun, 02 Nov 2014, 15:30
Forum: Electric motors and controllers
Topic: Simple Precharge Circuit
Replies: 22
Views: 5041

Simple Precharge Circuit

Hi Christopher, Great circuit. I can see one possible problem... If the ignition switch is turned to Start before the Precharge LED goes out, the current through the LED may increase to more than it should because of the connection via the Latch relay coil (depending on the coil resistance). Another...
by evric
Thu, 30 Oct 2014, 15:54
Forum: AEVA VIC Branch
Topic: Go Electric Sustainable Transport Festival
Replies: 22
Views: 4403

Go Electric Sustainable Transport Festival

Hi Bryce, The way I do it is to do a post mentioning the photos and then go into that post and then go to "Post Options" and then select "Edit Post" - there is a spot there to "Upload Image". I have done this with a few of the photos I took on the day. If anyone wants anything else specific - please...
by evric
Wed, 29 Oct 2014, 05:09
Forum: AEVA VIC Branch
Topic: Go Electric Sustainable Transport Festival
Replies: 22
Views: 4403

Go Electric Sustainable Transport Festival

TESLA Model S Test Drive...
I have placed a video I took from the back seat while Doug was driving and James from Tesla was explaining about the car.

http://youtu.be/Bf4O21gyzLo

Later, I had a drive and really tried the car's acceleration a few times, once I nearly lost traction - yeah!
by evric
Tue, 28 Oct 2014, 17:39
Forum: EV Motoring
Topic: AEVA Perth in the news again :)
Replies: 3
Views: 710

AEVA Perth in the news again :)

... a great plug for the AEVA.
by evric
Mon, 27 Oct 2014, 19:21
Forum: AEVA VIC Branch
Topic: Go Electric Sustainable Transport Festival
Replies: 22
Views: 4403

Go Electric Sustainable Transport Festival

Coming from Adelaide and not seeing a WA show, I would reckon that yesterday's EV display one the biggest that I have seen out of all the AGM's etc...
I think the timing was just right.
Congratulations Melbourne branch for putting on such a great show and a very good seminar on Saturday.
by evric
Mon, 27 Oct 2014, 18:50
Forum: AEVA VIC Branch
Topic: Go Electric Sustainable Transport Festival
Replies: 22
Views: 4403

Go Electric Sustainable Transport Festival

...hi Johny - there were 2 Teslas - A red one on display and a black one giving rides and drives - wow, what a car!
by evric
Fri, 17 Oct 2014, 22:47
Forum: The Lounge
Topic: newbie
Replies: 32
Views: 3077

newbie

openstaxcollege looks good, but no electronics or electricity books...
by evric
Wed, 08 Oct 2014, 14:23
Forum: AEVA VIC Branch
Topic: Go Electric Sustainable Transport Festival
Replies: 22
Views: 4403

Go Electric Sustainable Transport Festival

I'll be there, but, unfortunately my EV will be left in the shed in Adelaide...
It will great to meet all you guys.
Eric
by evric
Tue, 07 Oct 2014, 05:17
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums?
Replies: 64
Views: 6300

Upgrade to Lithiums?

Paul, The question is: what is the maximum voltage your controller can take? You need to charge the cells to at least 3.65V per cell. If your controller can accept 34 x 3.65 volts then all you need is a new charger like the TC Charger. These have to be ordered for the precise number of cells and cel...
by evric
Mon, 06 Oct 2014, 23:23
Forum: Batteries, charging, management and monitoring
Topic: Upgrade to Lithiums?
Replies: 64
Views: 6300

Upgrade to Lithiums?

Hi Paul,
Johny is right. Use 32 cells and then you won't strain your controller. Try your current charger and see how it goes. Ensure the BMS is setup to turn off the charger is it exceeds the maximum. Just monitor it at the end of charge.
Eric
by evric
Sun, 21 Sep 2014, 16:22
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40158

4Springs' Brumby

You already have too many contactors and relays...
Ian Hooper (www.zeva.com.au) makes a precharge circuit. Just buy and install one of them.
by evric
Sun, 21 Sep 2014, 15:09
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40158

4Springs' Brumby

As the circuit is now, if one of the Emergency stops is left open and then after trying to start is suddenly closed this will put full voltage straight on the controller. I suggest a HV sensing circuit, which via a resistor and the input of an optocoupler senses the HV and then a transistor output e...
by evric
Sun, 21 Sep 2014, 14:47
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40158

4Springs' Brumby

The circuit shows the contactor in the centre of your pack running off ACC. In my car ACC is turned off while I go to START. It should be wired to IGN side of the switch. Does your radio go off when you switch to START? If it does this maybe the cause of your problems.
by evric
Sat, 20 Sep 2014, 06:13
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40158

4Springs' Brumby

I would suggest to put it back so that you have to wait, but change the value of the resistor so that the time is only about 7 seconds (like mine). This amount of time is about how long it takes to get your seat belt on. If you have an override, it is too easy to make a mistake. Mine is wired so tha...
by evric
Fri, 19 Sep 2014, 06:27
Forum: Members Machines
Topic: 4Springs' Brumby
Replies: 223
Views: 40158

4Springs' Brumby

Christopher, have you got a good precharge circuit in place?
by evric
Sun, 17 Aug 2014, 15:19
Forum: AEVA WA Branch
Topic: Perth Science Festival
Replies: 8
Views: 1468

Perth Science Festival

Thanks Sally,

See more here...

viewtopic.php?p=52506&t=4255#p52506

I didn't get a good photo of the Treecycle.

Eric
by evric
Sun, 17 Aug 2014, 14:52
Forum: AEVA SA Branch
Topic: Science Alive! - Adelaide - August 2014
Replies: 0
Views: 1251

Science Alive! - Adelaide - August 2014

Last weekend, AEVA Adelaide had the largest "stand" at the 9th Science Alive! event at the Adelaide Showground. More than 20,000 people attended over the three days; August 8th, 9th and 10th. Friday the 8th was Careers Day for students in Year 7 and up, with over 3,500 students attending from around...
by evric
Fri, 15 Aug 2014, 15:34
Forum: General EV Discussion
Topic: Model S
Replies: 24
Views: 3274

Model S

Gabz wrote:
evric wrote: The red nosed one on the left is one of our new electric trains.
I've been told your mayor owns a LEAF.


Yes, and very proud of it - The Lord Mayor (Stephen Yarwood) spoke at our July AEVA Adelaide meeting.