KiwiEVs next project fast EV

Electric cars, trucks, ATVs, NEVs - things bigger than a motorcycle.
galderdi   1 kW

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Re: KiwiEVs next project fast EV

Post by galderdi » Dec 22 2016 8:56pm

Not that I have any experience, but I'd be tending towards an extra cross member and suspend a loop from there.

There are some forms of motorsport that require driveshaft precautions like that. Maybe there are some examples that could be used for inspiration. I guess the main difference is they are usually installing the protection inside a transmission tunnel.

http://www.jbrcaustralia.com/index.php?page=59

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Dec 26 2016 6:13pm

Merry Christmas Guys

I have a little / big problem L

I was taking a customer out for a ride in the shop truck Christmas eve, fully charge 165 volts no-regen leaving our shop downhill (that’s OK) I got to the sealed road and decided to do a 1st gear start wheel spin 2nd gear wheel still spinning and into 3rd going great J
Then I was coming back up to the shop on our dirt road and gave a lot of gas in 2nd it sounded like it over spun? Then popped the fuse. Nothing was hot BTW.

It’s my duel AC-35 set up, hour glass gave a code 14 – pre-charge fail

I replaced the fuse key start and code 14 again popped fuse bugger

Checked over contactors controller with multi meter found the following:

-both contactors shorted can’t even tap with hammer to open
-both controller + and – connections have a hard short across them even with Neg power lead disconnected.
-no residual power or volts across terminals

I haven’t got any other 1239 controllers to check terminals but all our 1238 controllers are open circuit between + and – terminals which I thought would be the case.

Any help would be great Guys Thanks

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Re: KiwiEVs next project fast EV

Post by amberwolf » Dec 26 2016 8:50pm

If it overspun, is there a chance it induced a voltage back into the controller higher than the FETs could handle, and popped them? Popped FETs could read dead short across main battery input.

Animalector   10 kW

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Re: KiwiEVs next project fast EV

Post by Animalector » Dec 26 2016 8:57pm

How, why would it have overspun? Sounds like a controller firmware issue if it did... I wouldn't have thought it could happen unless you shifted down a gear at super high rpm?

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Dec 27 2016 5:17am

I was only in 2nd gear and punched the thottle in power mode I have done this before and rear end gets crazy loose in the dirt. I was recommended a 350 Amp fuse when I bought the kit, which in hind site seams too small. I was giving her heaps of gas before but I only drove 5 miles total.
Would the fuse blowing give the FETs no where to flow?
I understand the contactors welding at 500 Amps each and the fuse blows.
I connected the curtis hand programmer up and diagnosed just gives pre-charge fail and secondary controller fault no code.

Any ideas or am I up for 2 controllers and 2 contactors

Cheers Kiwi

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 02 2017 3:42am

Good news I hope

I have no other faults except the welded contactors so just waiting for things to open so I can order 2 contactors and a fuse.
Off to Petrol head heart land with the electric ute Summernats hotrod show wish me luck.
Cheers Kiwi

galderdi   1 kW

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Re: KiwiEVs next project fast EV

Post by galderdi » Jan 08 2017 9:53pm

How did it go at Summernats? I hope you weren't anywhere near that guy who fell off the ute.

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 09 2017 1:56pm

galderdi wrote:How did it go at Summernats? I hope you weren't anywhere near that guy who fell off the ute.
It was a 100 meters down the road from our static display bloody tragedy mate.

We had over 12000 people thru the stand, was still a hard sell the people below 18 years and above 40 years were more respective and were keen to know more.

If someone could put together a burnout vehicle that could last 2 minutes and blow tires you would win over the masses.

Cheers Kiwi

galderdi   1 kW

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Re: KiwiEVs next project fast EV

Post by galderdi » Jan 09 2017 5:17pm

I'd give it a go in mine. But it's front wheel drive so it still might not get the reaction. I would be tempted to run fake V8 sound through a big amp for the first half of the burnout and then suddenly turn it off to really confuse them.
I attended a couple of static shows last year with some good interest. But the best one is being held on Feb 12 which is the same date as my first competition for the year.

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 17 2017 3:06am

Just a quick update

Installed new fuse and contactors, good and bad news the secondary controller fired up ok the primary has a pre charge fault smoked the bleed resistor and relay, replaced and smoked new bleed resistor so I think I'm up for one controller.
The joys of EVs :evil:

Cheers Kiwi

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Cowardlyduck   10 MW

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Re: KiwiEVs next project fast EV

Post by Cowardlyduck » Jan 17 2017 5:37am

Ouch! Those controllers ain't cheap either.
If only our motors were just 2 phase, then we could at least go instant WOT without a controller. :lol:

Cheers
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Re: KiwiEVs next project fast EV

Post by amberwolf » Jan 17 2017 5:40am

Well, you could use a brushed motor to mechanically spin a 3phase BLDC, that is electrically linked to the drive motor's phases, and cause that motor to drive the wheels... ;)

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eee291   10 kW

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Re: KiwiEVs next project fast EV

Post by eee291 » Jan 17 2017 5:52am

:lol:
amberwolf wrote:Well, you could use a brushed motor to mechanically spin a 3phase BLDC, that is electrically linked to the drive motor's phases, and cause that motor to drive the wheels... ;)

galderdi   1 kW

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Re: KiwiEVs next project fast EV

Post by galderdi » Jan 17 2017 3:00pm

Oh no. So sorry to hear that.

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 18 2017 5:48pm

Yeah its a bloody bugger alright :evil:

If anyone is on instagram they can follow us @evtorque

Cheers Kiwi

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 24 2017 5:49am

https://www.instagram.com/p/BPoj7UMFlQL/

Wow got the 66 vw bug moving today nice all round power very happy . :D

Cheers Kiwi

galderdi   1 kW

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Re: KiwiEVs next project fast EV

Post by galderdi » Jan 24 2017 7:54pm

Nice work. Any videos?

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 25 2017 4:03am

Thanks click the instagram link above for video

Cheers Kiwi

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The Toecutter   1 kW

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Re: KiwiEVs next project fast EV

Post by The Toecutter » Jan 26 2017 9:24pm

It's got some nuts. Was that 50% maximum possible input power to the motor?

I'd hoon it.

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Jan 27 2017 12:09am

The Toecutter wrote:It's got some nuts. Was that 50% maximum possible input power to the motor?

I'd hoon it.
No that was at slew rate 0.4 I can go to 0.1 slew rate and battery was only at 50% just being nice to the old girl for a start :P

It barks the tires I need to get a wheel alignment done and have a long to do list.

Cheers Kiwi

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Feb 05 2017 3:36am

So a few updates

The ute I ended up blowing the primary controller FETS :twisted: lucky we are suppliers now and with the help of HPEV and EV West have a replacement on the way :D

The 66 BUG is on the road hooning did its first Friday night lapping around town amazing the people that come out and look at her and are blown away when they see the motor. The power is more than enough for this old girl :mrgreen:

Cheers Kiwi

Couldn't help laying some rubber on the driveway 8)
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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Feb 05 2017 3:42am

And wee video


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The Toecutter   1 kW

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Re: KiwiEVs next project fast EV

Post by The Toecutter » Feb 05 2017 4:14pm

That's a nice little ass hauler you've got there.

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kiwiev   10 kW

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Re: KiwiEVs next project fast EV

Post by kiwiev » Feb 06 2017 1:40am

The Toecutter wrote:That's a nice little ass hauler you've got there.
F@#k yeah its a blast

Thanks Kiwi

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Cowardlyduck   10 MW

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Re: KiwiEVs next project fast EV

Post by Cowardlyduck » Feb 06 2017 2:16am

Is that Andrew helping you guide it in?

Still keen for a ride down Cooma way if you are. Some time soon would be good. :)

Cheers
High Power LiPo wiring harnesses - 4P - XT90, HXT4mm, 5.5mm. 200Amp+ capable. Global shipping.

Modified Stealth Fighter - Force air cooled motor @ 6KW, Heat-sinked Adaptto Mini-E. 49AH, 52V 18650 - 2.5Kwhr
Cowardlyducks - Stealth Fighter Videos

BikeE recumbent commuter - 9C, 6Fet Grinfineon, internal 17AH, 52V, + on-board solar.

The stuff I make and modify.

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