New Hybrid Technology

#26
#26
MWR said:
Whatever heat an electric motor generates, it is not close to what internal combustion engines produce.

Maybe these cars will be like the SR-72 blackbird, go so fast they can use friction with air for heat. :)
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As long as they don't leak fuel getting up to speed. :p
 
#27
#27
MG1968 said:
I continue to stand by my assertion that the Volt is going to be a disaster for GM.
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Maybe it will be, but the technology is definitely a step in the right direction. We're probably on the brink with these hybrid systems where a major breakthrough is close at hand. I would guess in the next 5-10 years some car company is going to come out with a plug-in hybrid model that gets 100+ mpg with the same performance as traditional gas cars.
 
#28
#28
The volt is a disaster because it's so danged expensive, and it won't sell well at all. Ya the uber rich greenies will buy em up, but contrary to their belief they are very few and far between.

I'm with rjd's view. I'm excited with the new technology, because of the cost saving and efficiency these new techs will bring. IE with the nissan, you drive it to work, and while your putting in your 8, it's charging. The charging stations could be solar powered, with a grid back up for cloudy days/night time. I honestly think electric could very well be the future for "commute" cars (going to and from work), and then something like hydrogen will be for the bigger stuff (sorry don't think we'll see electric semis anytime soon) and for the "trip" cars where you take on vacations and road trips.

Nuclear power should be the future, but I honestly think the greenies want us serfs to just ride in horse and buggies because they basically poo poo anything that produces energy. I mean even solar and wind, once you start seriously talking of putting them in they complain cause you have to use up all that land or the devices will chop up a bird here and there. Nukes have been axed a long time ago, with no sign of being allowed anytime soon.
 
#30
#30
Rasputin_Vol said:
Capacitors need AC power to actually be charged. If you want to charge the capacitors with a battery, you would need an inverter.
Posted via VolNation Mobile
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Of course someone with tesla as their picture will be weighing in on a discussion about AC power :rock:

...but explain this idea of needing AC to charge a cap? Im either missing part of the discussion or this is wrong. You Can charge a capacitor with DC, Capacitors are used in AC primarly for rectify circuits and Filters in signal processing. ( however their are MANY other uses). Capacitors are used in DC circutis on a regualar basis for voltage regulation. Capacitors Discharge DC curret as well.
 
#31
#31
Nash270 said:
Of course someone with tesla as their picture will be weighing in on a discussion about AC power :rock:

...but explain this idea of needing AC to charge a cap? Im either missing part of the discussion or this is wrong. You Can charge a capacitor with DC, Capacitors are used in AC primarly for rectify circuits and Filters in signal processing. ( however their are MANY other uses). Capacitors are used in DC circutis on a regualar basis for voltage regulation. Capacitors Discharge DC curret as well.
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Or they could just eliminate all this stuff and install a flux capacitor. Once you get the flux capicator fluxing, you are home free.

Or so they say.
 
#32
#32
MWR said:
Or they could just eliminate all this stuff and install a flux capacitor. Once you get the flux capicator fluxing, you are home free.

Or so they say.
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that works too, they just better pimp the delorean, i need some rims.... somebody call Xzibit
 
#33
#33
Nash270 said:
Of course someone with tesla as their picture will be weighing in on a discussion about AC power :rock:

...but explain this idea of needing AC to charge a cap? Im either missing part of the discussion or this is wrong. You Can charge a capacitor with DC, Capacitors are used in AC primarly for rectify circuits and Filters in signal processing. ( however their are MANY other uses). Capacitors are used in DC circutis on a regualar basis for voltage regulation. Capacitors Discharge DC curret as well.
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The capacitors are used at the load side of rectifiers to smooth out the DC output. If you had no caps at the load side of the rectifiers, the waves would look like this...

Waveform_fullwave_rectifier.png


The dashed lines below the zero axis represent what the normal/unrectified waveform looks like on the input side (sinusoidal).

With a capacitor in the circuit, you are still "charging" the caps with an AC signal, but only now, the capacitor is able to maintain the voltage close to the wave peaks before it gradually discharges.

2_16_0_12_eng.png


As you can see, the output of the waveform is relatively more steady. Once the wave form reaches it's peak in this second graph, the capacitor begins to discharge at a rate that is slower than the rate it would decay in the the first graph. The capacitor both levelizes the output voltage of rectifiers (removes the noise) and also is able to maintain the peaks for a longer period of time.

Of course, we are talking about at 120 hz (double what is normal for unrectified 60 hz signal)...
 
#34
#34
Rasputin_Vol said:
The capacitors are used at the load side of rectifiers to smooth out the DC output. If you had no caps at the load side of the rectifiers, the waves would look like this...

Waveform_fullwave_rectifier.png


The dashed lines below the zero axis represent what the normal/unrectified waveform looks like on the input side (sinusoidal).

With a capacitor in the circuit, you are still "charging" the caps with an AC signal, but only now, the capacitor is able to maintain the voltage close to the wave peaks before it gradually discharges.

2_16_0_12_eng.png


As you can see, the output of the waveform is relatively more steady. Once the wave form reaches it's peak in this second graph, the capacitor begins to discharge at a rate that is slower than the rate it would decay in the the first graph. The capacitor both levelizes the output voltage of rectifiers (removes the noise) and also is able to maintain the peaks for a longer period of time.

Of course, we are talking about at 120 hz (double what is normal for unrectified 60 hz signal)...
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Of course!
 
#36
#36
volinbham said:
For those wondering about the acceleration potential of electric cars:

YouTube - Electric Drag racing: White Zombie

Instant full torque is pretty appealing.
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it works great as long as there's a full charge in the batteries. The big drawback to batteries is that they're nowhere near as effective at 1/4 to 1/2 charge. As long as a gasoline engine has fuel, it will run just as fast at 1/4 as it does with a full tank. Perhaps even faster since it's slightly lighter.
 
#37
#37
i agree rasputin, learned about rectifying and time constants, in Circuits 1 (but it has been awhile). I didnt have the context of the earlier post, but that earlier post with out the context is not entirely true.

Yeah Electric cars are WAY more efficent (than combustion engines) at acceleration. I cant jump for the youtube vid, but their are videos of a car running solely off laptop batteries that can beat a high-end sportscars in a quarter-mile.
 
#39
#39
didn't obama's team tell us just a couple of months ago that the chevy volt wasn't viable?
 
#40
#40
oklavol said:
Chevy Volt 230 mpg: Chevrolet Volt's official fuel economy: 230 mpg - Aug. 11, 2009
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wait til it hits real world applications.

and by "real world" I don't mean a single person who has a 5-mile commute to work with the occasional weekend jaunt to a golf resort 30 miles away. The Volt is, admittedly, perfect for such a person, but only if you can rationalize it's high price tag.

I want to see a family of four who lives in Pittsburgh who makes regular trips to Cleveland, OH or Charleston, WV.
 
#41
#41
the ridiculous part of this is that it's basically a electric car, not a hybrid. you still have to plug it in every night and god knows what that will do for your electricity bill. is the mpg even relavant?
 
#42
#42
droski said:
considering 70% of all electical production comes from coal i'm not sure an electric car fits team obama's agenda
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Agreed from the carbon footprint point of view but I would much rather pay for domestic coal than foreign oil.
 
#45
#45
Vol_4_Life said:
I wonder what an electric engine sounds like when it's revved up. Like a wind-up toy or something?
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Probably sounds like one of those old popcorn poppers with a little motor that stirs the popcorn while it is popping.

If you have the ear for it, the sound of a well tuned internal combustion engine revving up is music to your ears.

Someday they may develop a recharging beam, firing down from a satellite, that will refuel your electric car while you drive down the road. Of course, the first bird - or airplane - that flew into the beam would be toast, but as the old saying goes, "Progress has a price."
 
#46
#46
GM Chairman Lutz was on Greta Van Susteren's show last night pimping the virtues of the Volt.

It won't hit showrooms until 2011 as a 2012 model and cost around 40K. Even with a government tax break of 7500, it's still a good 10 thousand dollars more expensive than a Prius or Insight and nearly 20 grand more than a Honda Fit.

jeez, I can't get over how much I hate this car and it's not even close to hitting the showroom.
 
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