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cookiejar
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Chevy Volt problem
cookiejar   10/15/2014 8:07:02 AM
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The Chevy volt does seem to solve all the problems presented by EVs.  BUT, there's always a BUT: I cannot even close the door with my 6'4" frame let alone drive in comfort.  You can forget the rear seat for real people too. 

Why is it that passenger cars do not fit people, while trucks and SUVs do with ease?  Why do passenger cars have low profile tires and firm suspensions so you can feel every pavement crack in your arthtritic neck and back?  Why does riding in a modern passenger car have to be torture? 

Even Road and Track laments the total disappearnce of smooth riding cruisers. Ironic isn't it?  It's the automotive press, including Consumer Reports, that rates cars based solely on race track performance that is to blame.  

I'm willing to bet that 99.9% of drivers have never used the full power output of their engines or the full cornering capabilities of their cars.  It's just too scarry and reckless getting anywhere near the actual capabilites of our modern cars on public roads.  And yet we are forced to suffer every time we drive our cars for these race track capabilities.

cookiejar
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public charging stations
cookiejar   10/15/2014 7:25:51 AM
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I'm just trying to visualize traffic at public charging stations as the number of electric vehicles becomes significant.  The fly in the ointment is charging time.  You can typically get in and out of a self-serve gas station in less than 15 minutes.  If your charging time is a couple of hours, the traffic jam, equipment and real estate requirements would be monumental.

If charging time is significantly reduced, then hydro utility demands become a problem.

Swapping out batteries only increases the manpower and equipment requirements as well as adding risk to the transaction.

Fuel cells may be the answer, as we could be back to conventional refueling.  When I started University in 1961, the fuel cell revolution was promised to explode in a couple of years.  Here we are 53 years later still waiting.  Don't hold your breath.

 

 

prabhakar_deosthali
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prabhakar_deosthali   2/27/2014 8:20:07 AM
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The shift from subsidies to fines. That is a welcome policy transition. 

It would force the increase the population of EVs, which will automatically bring their costs down plus thier will be a push towards building more charging stations on the highways.

All in all , the goal should be to reduce the carbon emission either by EV or any other alternate technology vehicles. So the law should be broad enough to treat Zero Emission vehicles using alternate technology also, in my opinion.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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