Monday, August 25, 2008

At last a concept drawing


This is drawing concept number three and I believe I'm closing in on how the first build will be.

Saturday, August 23, 2008

Finally calculations are showing results


With these dimensions to calculate the drag coefficient and loads of help from "anonymous" in Melbourne add the following tests results;

0-60km/h 11.05 seconds (using all the gears)
0-60km/h 9.5 seconds (using 2nd & 3rd and heavy acceleration)
840Kg (with driver but otherwise no fuel & empty)
0.4 Cd, drag coefficient (1.608Sq.M frontal area)
18.5 seconds free wheeling from 70 to 50 km/h (level surface & measured in 180Deg opposing directions)

and we calculated to accelerate the car from 0 to 60km/h it will use 1400Watts continuously for a duration of 11 seconds and so by my rough workings thats about 3.4Amps for 11 seconds out of my 13Amp/Hour battery.

Tuesday, August 12, 2008

The TECO works

No pictures yet but, this evening I've got a temporary setup going to help me work through all the parameters that have to be set on the TECO drive.
I've got 430 VDC from a single phase transformer/rectifier feeding direct into the drive which is giving me enough power to have the drive run a little three phase door operator motor from KONE in Perth. Many thanks to the Mod's department for freeing up this old equipment.

Plans now are to work through the parameter setup and take some voltage and current readings from this so I can work more accurately calculating the battery I'm going to need when all this goes into the Move.
Also I got The drive to spin the ASEA motor with a fan belt between the motors, so I can now confidently say this will work as a generator when I'm decellerating in the car, although it's only giving me 1.2Volts ph to ph at these low speeds.
There's lots more to come . . . . .

Wednesday, August 6, 2008

The TECO drive arrives



It's here, the drive arrived soon after I'd paid for it (about 6 days) and there's a link here to Michael Strzelczyk's eBay store site in Melbourne
http://stores.ebay.com.au/Drives-Online ,
which I found using eBay. He gets top marks from me for all the right reasons with very helpful service, excellent packaging (as you can see I'm still trying to get it out of the box) and delivery time as quick as Aussie Post could get it here.
The drive is a TECO 7200MA 7.5kW and it's shown here with the 6 pole motor.
Still chasing after batteries at this stage with price being the biggest barrier but, thats upfront price. If you spread the cost over the anticipated life of the batteries it looks heaps better.