|
|
Sept 25, 2014 11:10:23 GMT
|
Cheers cianha. I am excited, nervous, aroused about the Flux Capacitor. The battery specs are phenomenal. To answer your question about traction control - no. There is no traction control built into this system, but we will have variable maps available that can help regulate the power on launch. We first need to start driving it and building up power to ascertain some data.
|
|
|
|
|
|
|
Sept 25, 2014 13:22:10 GMT
|
traction control -
|
|
|
|
|
|
Sept 25, 2014 13:25:38 GMT
|
Ahh, but slicks on a street legal is cheating. For me it has to run on street tyres in order to silence the critics.
|
|
|
|
|
|
Sept 25, 2014 13:27:55 GMT
|
critic control -
|
|
|
|
|
|
Sept 25, 2014 16:39:12 GMT
|
wow thats mad
|
|
Last Edit: Sept 25, 2014 16:40:57 GMT by Dnoop_Sogg
|
|
v8
Part of things
Posts: 302
|
|
Sept 25, 2014 18:18:19 GMT
|
Fantastic project!
How on earth do you get hold of batteries like that ?
|
|
|
|
dw1603
Part of things
Posts: 591
|
|
Sept 25, 2014 23:34:15 GMT
|
Just worked my way through your Flux Capacitor blog, what a fabulous project! Didn't think that EV's were that exciting, but this is amazing, can't wait to see you demonstrate those unbelievable performance projections. Nitro is for pussies, Li-Pos are the new dangerous!
|
|
Last Edit: Sept 25, 2014 23:34:48 GMT by dw1603
|
|
|
|
Sept 26, 2014 13:55:03 GMT
|
Cheers fellas!
The lithium ion cells this spec aren't commercially available, so a company in the North East called Hyperdrive sourced them through Kokam in Korea. Hyperdrive have built the cell enclosures, wired the batts and also built the BMSs (Battery Management Systems).
|
|
|
|
|
|
Sept 28, 2014 9:18:00 GMT
|
The motors will start in SERIES configuration with the voltage output of the controller (ECU if you like) at 320 volts (160v + 160v) and 1800 amps. During a hard throttle run on the quarter mile – when certain parameters are met – the car’s controller will switch the motors in to PARALLEL mode. At this point the controller changes the voltage output to 160 volts and current 1800 amps. So parallel @ 1800A /2 = 900A @ 160v.
|
|
|
|
|
|
Sept 28, 2014 14:13:11 GMT
|
Fantastic, tell me about the speed controller, is it something you've built yourself? Or is it an off the shelf item used for automotive applications, or is it something you have spec'd up yourself and commissioned someone to build? whichever, it doesn't sound cheap! But I can't think of anything better to spend your money on, I love this thread, I have a bit of a thing for odd vehicles so electric ones I find interesting, at work we had an old Bradshaw electric utility truck, it was way more basic than this but sadly it has been scrapped now.
What about the motors, what are they? Did you opt for DC brushed motors? How are they wound? At 300v they are verging on industrial!
|
|
|
|
|
|
|
Sept 30, 2014 17:17:49 GMT
|
The motors will start in SERIES configuration with the voltage output of the controller (ECU if you like) at 320 volts (160v + 160v) and 1800 amps. During a hard throttle run on the quarter mile – when certain parameters are met – the car’s controller will switch the motors in to PARALLEL mode. At this point the controller changes the voltage output to 160 volts and current 1800 amps. So parallel @ 1800A /2 = 900A @ 160v. Not too sure why you would need to switch to parallel at top speed? but did you know that by switching in a "field weakening resistor" in parallel to your field winding you can add a further 10% to your top speed? .Lots on google. Great project.
|
|
|
|
|
|
|
fuldatramp - the controller is a production unit from the USA called the Manzanita Micro Zilla, which is well proven to cope with EV racing. It cost £4k - yes I fainted too.
The motors are industrial application brushed 9" motors with special mods by currentracing.co.uk
Using a PDA (palm computer) we can simply dial in/out the power, so for road use for example I'll probably have 30-50% power.
|
|
|
|
|
|
|
fuldatramp - the controller is a production unit from the USA called the Manzanita Micro Zilla, which is well proven to cope with EV racing. It cost £4k - yes I fainted too. The motors are industrial application brushed 9" motors with special mods by currentracing.co.uk Using a PDA (palm computer) we can simply dial in/out the power, so for road use for example I'll probably have 30-50% power. Yeah 4k is a good chunk of cash, but only a drop in the ocean when compared to the batteries! You've made a truly unique machine, I can't see anyone else putting this sort of capital into a car like this!!!! I love it! Keep up the hard work and every success to you on the drag strip!
|
|
|
|
|
|
|
|
Time for corner weighting. 711kg without batteries. With BMSs, cabling and batts we're nearly at the 850kg mark. Not so bad with 1100bl ft on tap.
Wheelbase is 1.7 metres. Overall length 2.84 metres.
|
|
|
|
Clement
Europe
ambitious but rubbish
Posts: 2,095
|
|
|
I see you've chosen your insurance on such sound criteria as their name 1.7m as a wheelbase is absolutely ridiculous compared to that torque figure (whose imperial expression puzzles me, but it's over one thousand and that's a lot). You'll be doing wheelies everywhere!
|
|
|
|
steveg
Posted a lot
Posts: 1,565
|
|
|
I think it's going to be fairly exciting getting it off the startline ! Are you planning any sort of traction control or similar to give you half a chance ?
|
|
|
|
|
|
|
You're not wrong steveg. Getting it off the line is always the challenge with drag racing, especially with such short wheelbase and no slicks. There won't be traction control available but the controller unit allows us to dial in/out power delivery a little. The throttle sensitivity can also be adjusted.
|
|
|
|
|
|
Oct 15, 2014 20:27:04 GMT
|
|
|
|
|
|
|
|
Excellent project - which I have only just found. I too have a "thing" about EVs having done a couple of school projects over the years, The last was a pair of "Greenpower" race cars. Re the short wheelbase and street tyres ...... Smoking fun!
|
|
|
|
|