Monday 27 April 2009
On Sunday I attended an event at Energy Australia
The trip there was 31.8km and the economy was 226Wh/km.
The recharge time was 4 hours. (I have never had a chance to 'watch' the chargers before.)
The return trip was 39.4km (Thanks to Kearon getting lost and me making the mistake of following him) I averaged 210Wh/km.
The extra kms were on flat ground around Olympic park. This really shows how much hills kill the batteries. I usually get abut 250Wh/km around the hilly area where I live.
Mark's Lotus 7 replica
Saturday 25 April 2009
Thursday 23 April 2009
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Joseph B. White
Senior Editor, The Wall Street Journal
Tuesday 21 April 2009
Friday 17 April 2009
After watching the video below I noticed the power and torque were much higher. This was before the tech changed some setting on the Dyno.
I extracted a plot from the shot of the TV screen and came up with the following.
We can see that the Road torque max is 5000N which equates to a shaft torque of 315 Nm.
I think the drive is cutting back torque after the peak at 20km/hr. The nominal peak at 28km/hr is a shaft torque of 283Nm.
As for RPM, The 28km/hr equates to 1178 RPM on the motor shaft.
The big dip is still evident, a little slower at about 52km/hr.
Thursday 16 April 2009
Tuesday 14 April 2009
Sunday 12 April 2009
(Power is 10x.) The above data was captured from the Danfoss VFD.
This would indicate that the Dyno run yesterday did not reach peak power / torque.50km/hr = 2100 RPM. The motor torque from the dyno plot at 50km/hr would be 2100*.323/5.125=132Nm. This (very roughly) corresponds to the scatter plot at that RPM.
The dyno plot can be for all intents ignored unfortunately. I will go and see them and see if they can do plots at multiple single speeds.
Tesla Coils and Doctor Who! I saw these guys minus the conductior at the Maker Faire in Austin, TX last October. The performing coils have to be seen and heard to be beleived!
Saturday 11 April 2009
I took the Electro-Lux to a local Dyno Day today at Envy Imports. The revheds enjoyed seeing something different. I think I get the record for the lowest power and first ever EV on the Dyno.
My diff ratio is 5.125:1 and my wheel radius is about .323m.
Tuesday 7 April 2009
Friday 3 April 2009
Today the speedo rolled over 400 electric kilometers.
There have been no significant problems, just some minor niggles.
I am confident that as long as the batteries live up to expectation I will get many 1000's of EV kilometers.
Minor changes include:
- Replacing one battery due to a loose terminal.
- Replacing 2 x Zener balance circuits due to mismatch.
- Adding a series resistor to the 7 solenoids because they were getting too hot.
- Adding an electric fan to the motor to cool it down after long up hill stretches.
I am finally cleaning up the car port (Yes car port, I did the hilux conversion in a carport, I dont have a shed).
The old 22R engine and and power steering are listed on eBay http://shop.ebay.com.au/merchant/a4x4kiwi