Hybrid Car – More Fun with Less Gas

Hey do you know your car's alternator only outputs 7-10% while it's running? - Page 16

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Posted by Paul Keinanen on August 9, 2009, 5:04 am
On Sat, 08 Aug 2009 23:56:38 -0400, Jamie

When was the 48 V system discussed ?

The 42 V (3 x 14 V) system was a hot debate subject in the beginning
of this century.


Posted by MooseFET on August 9, 2009, 2:26 pm

The nominal 48V was really 56V.  It was 4 nominal 12V batteries in
There is still talk of it in the area of hybrid cars.

Posted by JosephKK on August 17, 2009, 6:08 pm


I heard that they had gone much higher than that in full electrics,
like 320 V.  I also heard that it had something to do with leveraging
existing variable frequency drive electronics and motors.

Posted by clare on August 10, 2009, 2:32 am
 On Sat, 08 Aug 2009 23:56:38 -0400, Jamie

measured in AMP but in WATT?

the only way to get more power out is to increase the current.

Yes, and the only reason 12 volts does that is because to provide the
same amount of POWER only half the CURRENT is required - therefore
lighter wires, less weight, and less space.

Posted by Eeyore on August 8, 2009, 6:28 pm

daestrom wrote:


measured in AMP >> but in WATT?

Youtube has some lovely clips of wind turbines self-destructing when the brake
or feather mechanism designed to cope
with high winds fails.

Running at higher rpm may also exceed bearing ratings too, i.e. the alternator
life will be drastically shorted. Try
revving your Chevy to 10,000 rpm for comparison !


due to the hugely increased level of spam please make the obvious adjustment to
my email address

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