This Audi can travel 375 miles at 55mph on a 6-minute charge

reply to post by C0bzz


Direct solar powering a vehicle just isn't a practical proposal. Typical midday sunlight delivers about 1kW/m^2 max so even if you managed to fit 5m^2 of 100% efficient solar cells (which don't exist) on a car with a 100% efficient electric motor (doesn't exist either), you'll have a brutal 5kW (6.7HP) at your disposal for only a short time on the most ideal day and location. Not too good for setting any speed records or hill climb times, just something of a curiosity if you could make it work at all.

As for the 6 minute charging of that 260Ah battery I worked out it would require an installation rated at over 2MVA to provide the current at the required voltage which is truly massive when you consider the average domestic pad-mounted distribution transformer is only around the 250-400kVA rating.

How did u come up with 2MVA?

technology, what a great thing. The air powered car has the gas car beat hands down when it comes to the environment, but the fuel car has much more power, it drives semi's that haul products, thus having more power. The air powered car seems to be the car for the average joe to go back and forth to work on a daily basis. I like this car. I want one, now. I will have to look into the mechanics of this thing. I need to read up on this thing, this is very new to me. Thanks for the info here, i love it. Oh, check it out. www.youtube.com... WHATS UP WITH THIS, ONLY SOME VIDEOS WORK , another conspiracy. go to youtube and click in ( the air powered car)

Some of these cars look a little wierd, but who cares just as long as we get to work for free on air. here are some other places to go to on youtube since they will not let me show videos to others. I'm sure if it was a gas car they would let me show videos all day, but not for the air cars tho. Here they are located at youtube. ( a car that runs 200 miles on compressed air.) and ( cnn-a revolutionary car that runs on air.) also check out the TESLA CAR ON YOUTUBE. it's a great find.

As good as all these electrics look, we all need to remember that "nobody rides for free". As I read somewhere in a discussion of the Nissan electric, you'll need to

A - buy a specialized home-charging unit
B - buy to have it installed by qualified technicians
C - purchase any local permits or ordinance waivers to have it installed/used

All these are NOT included in the purchase price and add up to additional thousands of dollars.

From what I see so far these new electrics are just a "atta-boy" given to us by the gas-guzzling automakers as a PR tool so we look at their brand and smile. In reality, it's quite unrealistic to own, operate and maintain one as advertised. The deck seems stacked (to me, at least)

I sure hope it's not the case.

The tesla electric car will beat this car. I'ts unbelieveable, remarkable.www.youtube.com... Just as i suspected, i show a gas car video and it works on here, but if i show an air car, it will not. WHATS UP WITH THAT? AYE

Tesla care vs. porche. The electric car vs the gas one, which one do you think will win? www.youtube.com... Maybe this vid won't work either, conspiracy. I'm right, everytime i show an electric, air car or other than gas powered the video will not work on here. Like i said , i can show on here gas powered vehicles all day and never have a video not work. The second i put up a electric power or air power , the video suddenly will not show. WHY IS THAT A.T.S.?

Originally posted by davespanners
Things are not quite as good as they sound here.

According to this article the 6 minute charge time was achieved by hooking it up to a 345 kV power supply, so if you own your very own power station that might be achievable,

To us normal people though the figures are somewhat less inspiring at 4 hours for 70 miles

Originally posted by davespanners
reply to post by smurfy

 

Yes but the recharge time is a lie, as I posted before, unless you have a 345Kv power supply with a DC rectifier

Stepping up from normal house wiring (220/240/440/480 single or 3 phase) 345KV is not that hard to do. It's a simple transformer that will accomplish that. Now what you really need to know is the total wattage consumed during the 6 minute charge or the ampere draw during that charge that will mess with you. Typical household wiring is current limited to around 200 amperes total draw at 220V so you would need to know the wattage in order to do the back-math and learn if it's possible at the home.

Originally posted by ohhwataloser
How did u come up with 2MVA?

The battery is quoted as having a 260A.h capacity but batteries have efficiency issues in charging that increase proportionally to the square of the current so, if this battery needs 1.25C for fast charging (which would be outstandingly excellent), you need to input 260A x 1.25 = 325A for a full charge in 1 hour or 3250A to charge it in 6 minutes (1/10th hour). The battery terminal voltage is 380V so charging would require a voltage around 110%-120% of that which is somewhere around 440V at the battery terminals and even higher at the power supply end of the busbars.

This power would be ideally be provided by a 3 phase 'rectiformer' type setup (transformer combined with rectifiers) with active regulation and that sort of current amounts to huge losses before any power actually gets to the battery itself. Allowing about 20% losses in that mammoth power supply I get 3250A x 440V x 1.2 = 1.7MVA absolute minimum rating and preferably at least 50% larger than that (2.5MVA) to have any reasonable mean lifetime. The rule of thumb is that every 10C rise above ambient temp halves component life expectancy.

If the whole thing runs off a 22kV 3ph AC distribution feeder, the phase current in the line during a 6 minute charge would be around 45A/phase.

I'm not trying to put down the idea as it really is a sensational development battery-wise, but I wouldn't expect too many such 'recharging' installations to appear anytime soon and household charging just doesn't meet the demands that would make it an attractive alternative. My estimate of cost of running the vehicle at typical domestic general supply electricity rates indicates around half the cost of running a gasoline engined vehicle (fuel only).

A typical domestic charging installation for an 8 hour recharge would need to be around the 440V output as above and deliver 325/8 = 40A continuous for a full charge IE a regulated 17.6kW power supply and I shudder to think what something like that would cost outright to install.