[jonescg]

Hope it works out for you mate! Otherwise there's a lot of plastic tubing to melt right where you don't want it to.

I have been assured two new, matched Agnis, but thanks to China's stance on rare earth metals (and the slow development of mines elsewhere) the cost of the motors have gone up by about $310

 

[RIPPERTON]

Hope it works out for you mate! Otherwise there's a lot of plastic tubing to melt right where you don't want it to.

I have been assured two new, matched Agnis, but thanks to China's stance on rare earth metals (and the slow development of mines elsewhere) the cost of the motors have gone up by about $310

So you going to make it to Winton ?

 

[jonescg]

That's the plan!

 

[RIPPERTON]

Just got water cooling system finished so went for a trackday
down the Creek. no photos but great on bike video
http://www.youtube.com/watch?v=uzHUcvzHJVU
did all 6 sessions but only 4 laps per session (16km)
except one session did 5 laps (20km) and last session did 6 and half laps 26km and bottomed the pack but didnt damage any cells.
was able to recharge with just enough time between sessions.
water cooling went well but needs 2 fans on the under seat radiator to move the air properly as I cant put it up in front of the battery.
had a few leaks but turned out to be very effective at removing heat from the stators.
bike still weighes 135kg and as you can see
absolutely chops up anything in turns.

 

[RIPPERTON]

The windings are running at about 80 to 90 C now and with the new 144v 600A controller still on the old 136v pack would be putting out 80 odd kW minus motor losses.
Smaller controller is working harder and was caught up at the 40C mark after a session so it might need a fan too.
Torque is really punchy out of turns but did over amp it twice by giving too much throttle so have to roll throttle on slowly.
the coils are running 50C cooler and thats about what the radiator runs at... funny that.
but the rad isnt getting enough air under the seat so have to put some 180mm computer fans on it (0.9A draw for 2 fans).

 

[jonescg]

Looks like you just made a fairly big advance there Dan. 90'C versus 140'C is a big difference Well done!

Did the Mars motor come with a water jacket or did you have to fabricate one in there? Some noooobs out on the track there with you, but whatever, they were going faster than I was I need to get some sticky tyres for the next round, and maybe a faster rider. Preferably someone who knows how to steer an old dunger around. I'm also dropping my reduction drive to 14:54 so the motors aren't working so hard for so long.

Anyway, you've done well mate!

 

[SplinterOz]

Dan, Looks like you have taken a fair bit of time off your lap times compared to the race...

 

[RIPPERTON]

Did the Mars motor come with a water jacket or did you have to fabricate one in there? Some noooobs out on the track there with you

The Motenergy casings didnt have any jackets in them so I made some.
would be much simpler to make casings with a cooling circuit built in.
Yeah the tourists make me look fast but I only took 2 seconds off my eFXC time. did a 2.05 with the water cooling but also went from 800 to 600 amps in the controller area. just got to make the 175 v battery now

 

[RIPPERTON]

Funny thing happened in scrutineering.
I rode the bike to the scrutineering pit with helmet on, rolled in there, got off the bike and stood beside it, left the controller on, warning beacon flashing
There were 4 guys there who walked over and started scratching their heads cause they had never checked an electric bike before. One guy walked up to the throttle and went to give it a flick as you do to check if the cable is binding, exactly at the same time I realized the bike was active.
My right hand went flying toward the ign switch, it was like a race between my right hand and his, I had to get to the switch before he flicked the throttle !!!......he beat me but only by a micro second. the bike chirped the rear wheel jerked forward and stopped dead and we looked at each other and said fark. Then I explained the purpose of the flashing beacon.

 

[JRP3]

Maybe a kill switch lanyard that disables the bike when you are off it, either voluntary or otherwise?

 

[RIPPERTON]

Maybe a kill switch lanyard that disables the bike when you are off it, either voluntary or otherwise?

Nah, Ive got one of those but never use it

 

[jonescg]

I trust you explained it was live? If so, well, yeah, you can't fix stupid...

Apparently one of the Euro TTX-GP rounds had a bike go flying due to exactly the same reason. And that was with the flashing light and lanyard...

 

[JRP3]

There is so little familiarity with this new technology that I can see the same thing happening again. No noise to tell people it's running and no neutral could easily equal disaster. I'm the last one to play safety police but you had a near miss and got lucky this time.

 

[RIPPERTON]

tighten your bolts !!!!!!
after adding the charging cable to the group of cables at one end of the fuse holder I probly forgot to give it a good tighten. So that entire connection would have been glowing red hot while I was enjoying myself flying around the Creek.
It produced a smell like cooked windings but also like wood burning ???
Even saw a whiff of smoke come up as I pulled into the pits.
That would have been the bakalite stuff.
I put it down to another set of toasted stators.
this shot isnt how I left it, was properly assembled and all the lugs were stacked and space right just not tightened fully. didnt notice it till 3 days after the track day.
400 amp fuse (not blown) and melted alloy washer

 

[DawidvC]

That is nasty!
You are right about checking connections - it is the biggest cause of failure of electrical systems. It cannot be repeated often enough.

Dawid

 

[RIPPERTON]

1 water pump, 1x 120mm fan and 2x 180mm fans draw total 1.25 amps.
can still keep my 4 cell A123 12v pack.

 

[jonescg]

Do you have a DC-DC converter to keep the 12 V auxiliary battery charged?

Looks trick Dan


Hey - my good news - The Perth Branch of the AEVA have sponsored me $250 towards my race entry fee for Winton! Sweet! Very pleased about that. Could be a bit more (or a lot more, given it's a long way away) but I'm happy to be representing the West

All I need now is for the motors to be shipped at a reasonable price and we can start to make a race of it. Oh, I might have a better looking tank cover ready by the time I send the chargers over too. Anything will be a lot better than the crap I have on it now.

 

[RIPPERTON]

nope no DCDC
I just charge the 12v whenever I need.
I think the 120mm fan on the controller is too big.
with no room for the air to flow down the heat sink
most of the air actually comes back out past the
tips of the fan blades.
Ive found that there is a lot more power
now that the fuse holder is tightened properly

 

[Evilsizer]

why did you choose the 180mm fans and what brand/model are they?

 

[RIPPERTON]

why did you choose the 180mm fans and what brand/model are they?

Wanted to completely cover the radiator.
turns out they arnt that powerfull but should do the job for now
they are Silverstone. high glass content in the mouldings
very good quality.

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