Search found 421 matches

by zeva
Wed, 11 Jun 2014, 02:54
Forum: Members Machines
Topic: Ian Hooper's Honda NSR150 conversion
Replies: 41
Views: 10893

Ian Hooper's Honda NSR150 conversion

I thought it was about time I uploaded some pics of the NSR150 conversion. The project has been progressing well, hopefully it'll be rideable in the next couple of weeks. The motor I'm using is a Motenergy ME1003, a pretty torquey little permanent magnet DC motor. At 600A max it should put out a bit...
by zeva
Thu, 29 May 2014, 21:22
Forum: EV Motoring
Topic: Tesla Model S production line
Replies: 24
Views: 2733

Tesla Model S production line

Very interesting.. Still way above the average car buyer's price range - which includes me http://forums.aeva.asn.au/smileys/smiley19.gif - but their quality and performance puts them in competition with BMWs and Mercedes, so they could sell pretty well. If I were rich (and less sentimentally attach...
by zeva
Wed, 21 May 2014, 00:49
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23686

Ian Hooper's RX7 Conversion

Hah, I was thinking the same thing while I was screwing them in.. I didn't have any suitable black screws handy, but I'll get some.
by zeva
Tue, 20 May 2014, 22:34
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23686

Ian Hooper's RX7 Conversion

The RX7 gained a new addition today - a new display module for my EV Management System, aka the EVMS Monitor V2, which talks over CAN bus to the EVMS Core and BMS modules for providing instrumentation to the driver. It's something I've been working on for the last month or two, to replace the somewh...
by zeva
Wed, 14 May 2014, 22:28
Forum: EV Racing
Topic: Twin 9 inch vs twin 11 inch
Replies: 6
Views: 1068

Twin 9 inch vs twin 11 inch

Some figures for you: John Wayland's White Zombie has a claimed 1050Nm of torque from the twin motors at 2000A. Pretty sure he has ADC motors, not sure if it's the 8" or the 9". Mike Willmon's Ford Pinto conversion uses dual 9s with a Z2K controller and gets "over 1000Nm". My RX7 uses dual Impulse 9...
by zeva
Mon, 10 Mar 2014, 19:33
Forum: AEVA WA Branch
Topic: Electrikhana 2014!
Replies: 45
Views: 7806

Electrikhana 2014!

If anyone happened to get any pics of my RX7 out on the test track in the afternoon (sacrificing my tires for the greater good), I'd be interested to get a copy.. Image
by zeva
Tue, 04 Mar 2014, 18:03
Forum: For Sale/Wanted
Topic: FS: Alltrax AXE4834 controller, near new, $150
Replies: 5
Views: 510

FS: Alltrax AXE4834 controller, near new, $150

Hi Greg, yes it is still available - PM me if interested to discuss further?
by zeva
Sun, 19 Jan 2014, 02:07
Forum: AEVA WA Branch
Topic: WA Electric Highways!
Replies: 81
Views: 11757

WA Electric Highways!

Fantastic idea! Happy to do what I can to help. Let's chat about it next time we catch up.
by zeva
Thu, 09 Jan 2014, 01:03
Forum: Technical and conversion discussion
Topic: Contactor orientation
Replies: 40
Views: 6990

Contactor orientation

Gosh, how confusing. I thought the Kilovacs were marked with + and - and the Gigavacs A2 and A1. So the Kilovacs have +A1 and -A2.. And the Gigavacs appear to have -A1 and +A2: http://www.greegoo.cn/UploadFilesother/gx14-dimension-1.jpg One would be forgiven for getting confused. But I think we're i...
by zeva
Wed, 08 Jan 2014, 21:32
Forum: Technical and conversion discussion
Topic: Contactor orientation
Replies: 40
Views: 6990

Contactor orientation

Yep I'm pretty sure Johny is correct, and the quote from EV Source (for conventional current). + (Kilovac) or A2 (Gigavac) should be the anode, where conventional current flows in. - (Kilovac) or A1 (Gigavac) should be the cathode, where conventional current flows out. I kinda wish they just labelle...
by zeva
Thu, 02 Jan 2014, 03:37
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23686

Ian Hooper's RX7 Conversion

Hi all, FYI I've just added a quick update to the build blog, covering the installation of the new CAN-based BMS and EVMS - direct link to the post here: http://www.zeva.com.au/Projects/RX7/?section=testingLicensing#Jan2014Update http://www.zeva.com.au/Projects/RX7/Pics/BMS12_Closeup.jpg Pic of the ...
by zeva
Sat, 14 Dec 2013, 15:36
Forum: General EV Discussion
Topic: DIY Game Changer?
Replies: 41
Views: 4152

DIY Game Changer?

An interesting discussion on a topic which has been on my mind a lot lately. I've eked out a living in the conversion world for some years now but have had to diversify over the last 12 months to stay afloat, and may soon get out of this game altogether (well, except for personal interest). The EV c...
by zeva
Mon, 02 Dec 2013, 01:02
Forum: Members Machines
Topic: Ian Hooper's Honda NSR150 conversion
Replies: 41
Views: 10893

Ian Hooper's Honda NSR150 conversion

Time to introduce my new EV project, conversion of a 2001 Honda NSR150: http://forums.aeva.asn.au/uploads/112/NSR1.jpg This bike has actually been sitting in pieces in my workshop for a couple of years now, after I partially disassembled it one day after getting sick of the unreliable old 2-stroke d...
by zeva
Tue, 12 Nov 2013, 09:29
Forum: For Sale/Wanted
Topic: FS: Alltrax AXE4834 controller, near new, $150
Replies: 5
Views: 510

FS: Alltrax AXE4834 controller, near new, $150

No, sorry, I only have the controller. (The vehicle it was in briefly had a 0-5V twist-grip throttle which I was adapting for the Alltrax with a digital pot adapter to make it 0-5Kohm, but I ended up swapping a bigger Kelly in and using the 0-5V throttle input instead.)
by zeva
Tue, 12 Nov 2013, 06:33
Forum: For Sale/Wanted
Topic: FS: Alltrax AXE4834 controller, near new, $150
Replies: 5
Views: 510

FS: Alltrax AXE4834 controller, near new, $150

Bump and price drop to $150!
by zeva
Tue, 12 Nov 2013, 06:30
Forum: For Sale/Wanted
Topic: [For Sale] Kelly KD48400, as new never used, $100
Replies: 2
Views: 338

[For Sale] Kelly KD48400, as new never used, $100

Hi Angelito,

In fact it is still here, sitting on a shelf in my workshop! I'd almost forgotten about it Image

It is for 48V systems, DC motors, up to 400A motor amps.
by zeva
Mon, 04 Nov 2013, 05:51
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23686

Ian Hooper's RX7 Conversion

I wonder why IGBTs lend themselves to 3-phase inverters more than DC speed controllers? Faster switching maybe? It's more to do with efficiency at various voltage levels. Up to about 200V, MOSFETs win hands down. You'll probably find all controllers rated up to 200VDC will be MOSFET based, includin...
by zeva
Fri, 01 Nov 2013, 22:53
Forum: Members Machines
Topic: Ian Hooper's RX7 Conversion
Replies: 102
Views: 23686

Ian Hooper's RX7 Conversion

It's been a while since my last update so I thought I'd write up the latest news. Soon after my last post, I took the Zilla controller out again and bit the bullet - shipping the whole lot back to Manzanita Micro for repair. They were able to reproduce the fault and ended up simply replacing the who...
by zeva
Fri, 25 Oct 2013, 18:02
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 5
Views: 2446

12-cell CAN-based BMS modules

Thanks. Likewise, over the years my thinking has migrated away from the need for high energy shunts, after calculating/estimating how little balancing is required to maintain pack balance. I believe it's in the order of 1% per year drift, e.g two similar 100Ah cells might end up 1Ah apart after a ye...
by zeva
Fri, 25 Oct 2013, 06:41
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 5
Views: 2446

12-cell CAN-based BMS modules

The bypass resistors are the little SMD 100ohm ones near the quick-connect terminals along the bottom. I decided an interesting way to go would be to use very weak shunt resistors - only ~35mA shunt current - but leave them on for a relatively long time. So the microcontroller maintains shunt timers...
by zeva
Fri, 25 Oct 2013, 02:16
Forum: Batteries, charging, management and monitoring
Topic: 12-cell CAN-based BMS modules
Replies: 5
Views: 2446

12-cell CAN-based BMS modules

Hi all, Time to reveal the new BMS project I've been working on! Developed in part to fill the requirements of one of my clients, but intended for general EV use as well. (I'll be building a set for my RX7 in the near future.) In brief it's based around the LTC6802 BMS chip for cell monitoring and s...
by zeva
Mon, 07 Oct 2013, 03:42
Forum: Batteries, charging, management and monitoring
Topic: Chademo
Replies: 22
Views: 3281

Chademo

That CHAdeMO jump starter is pretty cool. Looks like the sort of thing RAC might have in their service vehicles in the future.

I wonder what sort of $ they'll be..
by zeva
Mon, 07 Oct 2013, 03:26
Forum: General EV Discussion
Topic: Help with drop in Torque
Replies: 13
Views: 1457

Help with drop in Torque

It does sound like it could be a loss of motor current capability in the controller. 5 years is a bit young for a Curtis to start packing it in (most seem to go for about a decade) but if it has been running hot, that may have aged it faster. A lot of electrical components have their lives halved fo...
by zeva
Sun, 06 Oct 2013, 20:58
Forum: General EV Discussion
Topic: Help with drop in Torque
Replies: 13
Views: 1457

Help with drop in Torque

Normally, high resistance connections on the battery side of the controller have more of an effect at high speed - where power and hence battery current is higher - rather than low speed acceleration. At low speeds the battery-side currents are quite low compared with the motor currents, so in your ...
by zeva
Mon, 30 Sep 2013, 00:51
Forum: Members Machines
Topic: Renard's BMW
Replies: 237
Views: 28802

Renard's BMW

The Zeva precharger utilises a solid state relay for switching precharge. It's tough to get them rated for voltages much higher than that. However your circuit above would avoid that problem. Hi all http://forums.aeva.asn.au/smileys/smiley1.gif The CPC1968 I use in the higher voltage precharger is ...