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  #31  
Old 20th February 2019, 10:47 PM
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Quote:
Originally Posted by moltuae View Post
Batteries are DC though. You can't store AC.
Yep.

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Originally Posted by moltuae View Post
The AC required for the motors is generated by on-board inverters. I don't have the technical details but it's likely that the inverters pulse the DC (thus generating a pseudo AC), and control the power to the motors by adjusting the duty-cycle (on-off ratio), also known as PWM (Pulse Width Modulation).

Even if the vehicle receives an AC charging feed, there will have to be rectification and voltage regulation for charging.
That's pretty much the process it uses. IIRC when charging it runs through an additional rectifier to the traction motor circuit, and then uses the motor's stator for inductance filtering.

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Originally Posted by moltuae View Post
For slow-charging vehicles it's practical to have that circuitry on-board. But, if you're fast-charging at hundreds of amps, you're gonna need some pretty big rectifier diodes!
As of when I handed mine back, most fast chargers (excluding the Tesla network) were 43AC/50DC. One assumes they'll have to come up with something new as the chargers increase their rate. Or abandon it completely, which seems quite possible given that they're more or less the only ones that are AC only.

Last edited by Doodle; 20th February 2019 at 11:02 PM.
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  #32  
Old 21st February 2019, 04:34 AM
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Default very interesting reading

but being from derbyshire and a bit thick the only AC/DC i know is one of the best rock bands ever..
and its good to see the old Diesel Geny waiting in the back ground to help..
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  #33  
Old 21st February 2019, 08:56 AM
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and its good to see the old Diesel Geny waiting in the back ground to help..
And not so much in the background in some cases:

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As Kermit used to say, "It's not easy being green"
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  #34  
Old 21st February 2019, 11:16 AM
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Fantastic that shows derv is here to stay lol

trains
boats
planes
generators
home heating
cranes
jcb,s
diggers
dumpers
etc etc
ooh and hi-brids
ooh and
my A8
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  #35  
Old 25th February 2019, 01:35 AM
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As our IC cars have engine numbers and these are printed on registration documents etc... do electric cars have motor numbers or similar?
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  #36  
Old 25th February 2019, 10:49 AM
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Originally Posted by snapdragon View Post
As our IC cars have engine numbers and these are printed on registration documents etc... do electric cars have motor numbers or similar?
That's an interesting question. I hadn't thought about that.

I suppose the serial number is more important with IC engines since it's necessary to tie mileage with the engine as a wear-indicator. With much less moving parts, I suspect wear is less important with EV motors.
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Last edited by moltuae; 25th February 2019 at 10:54 AM.
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  #37  
Old 2nd March 2019, 09:07 PM
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Thanks moltuae.
What do you all think of this?
A TESLA powered AUDI!
https://www.youtube.com/watch?v=fFr5Sm8KE5E
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  #38  
Old 7th March 2019, 06:24 PM
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Default Next....

https://electrek.co/2019/03/07/tesla...on-first-look/
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  #39  
Old 18th March 2019, 03:39 PM
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On the related subject of renewable energy, this recent TED talk is well worth watching:

https://www.youtube.com/watch?v=N-yALPEpV4w

As we rush headlong into renewables, it seems that our misguided attempts to save the planet are actually destroying the environment and doing far more harm than good. And what's worse, we've had the answer to producing clean energy for more than 70 years but we choose to ignore it, rather than strive to perfect it and make it even safer, because a misinformed public opinion has deemed it to be dangerous, dirty and not worthy of consideration.




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  #40  
Old 18th March 2019, 05:55 PM
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Quote:
Originally Posted by moltuae View Post
And what's worse, we've had the answer to producing clean energy for more than 70 years but we choose to ignore it, rather than strive to perfect it and make it even safer, because a misinformed public opinion has deemed it to be dangerous, dirty and not worthy of consideration.
Here's an interesting article also about the nuclear industry, and goes into how clean nuclear could really be. The link points to the Wayback Machine, as the link on the real site doesn't work.

https://web.archive.org/web/20131005...m/busted1.html
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