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Re: [EVDL] LED Taillights - a money saver in gas cars?->rangeextenderin EV's? - an an

I suppose if you raise the voltage, you'd have to reduce the current limit
to acheive the same maximum wattage? Maybe not on a PC supply (or any multi
output supply) since you're not going to use the 3.3V and 5V sections.

----- Original Message -----
From: "(-Phil-)" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Wednesday, September 26, 2007 11:29 AM
Subject: Re: [EVDL] LED Taillights - a money saver in gas
cars?->rangeextenderin EV's? - an analysis PC Power Supply


> PC switchmodes almost always have capacitor voltage doublers on the input
> (split rail). That means they probably need a minimum of 250ish volts to
> start properly (assuming they'll run with Japan-Spec AC).
>
> There are plenty of surplus 12v supplies that are only designed for US
> spec
> and don't use doublers, so that means they are designed to run at ~150VDC
> but will probably start at around many pack voltages.
>
> Remove the bridge rectifier and AC input filter stages and you have a nice
> DC supply for your EV.
>
> It's usually pretty trivial to adjust a 12v supply up to 14v without too
> much trouble.
>
> -Phil
> ----- Original Message -----
> From: "Marty Hewes" <[email protected]>
> To: "Electric Vehicle Discussion List" <[email protected]>
> Sent: Wednesday, September 26, 2007 7:47 AM
> Subject: Re: [EVDL] LED Taillights - a money saver in gas
> cars? ->rangeextenderin EV's? - an analysis PC Power Supply
>
>
>> The PC supply I'm looking at here does 25 amps at 12 volts (300 watts),
>> and
>> it's better than average. I don't know what it would take to raise the
>> voltage, control overcharging, and make it run off of a DC input. Maybe
>> it
>> could supplement the aux battery, maybe with the addition of some
>> alternator
>> regen during deceleration, to the point a large DC/DC is not required.
>> Might be able to find a 12 volt only "brick" type supply surplus
>> someplace.
>>
>> Marty
>>
>> ----- Original Message -----
>> From: <[email protected]>
>> To: "Electric Vehicle Discussion List" <[email protected]>
>> Sent: Wednesday, September 26, 2007 8:53 AM
>> Subject: Re: [EVDL] LED Taillights - a money saver in gas cars? -
>> >rangeextenderin EV's? - an analysis PC Power Supply
>>
>>
>>> down from 530 watts to 440 watts...
>>> Now we're talking about "pc power supply" range for $50 bucks, rather
>>> than
>>> expensive $250+ DC/DC converters...
>>> What do you folks think?
>>>
>>> Has anyone used a cheap pc-power supply rather than a DC/DC converter -
>>> to
>>> recharge their 12-volt aux battery?
>>> Do you think it would hold up?
>>>
>>> Ed Cooley
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> "Adrian DeLeon" <[email protected]>
>>> Sent by: [email protected]
>>> 09/25/2007 23:37
>>> Please respond to
>>> Electric Vehicle Discussion List <[email protected]>
>>>
>>>
>>> To
>>> [email protected]
>>> cc
>>>
>>> Subject
>>> Re: [EVDL] LED Taillights - a money saver in gas cars? -
>>> >rangeextenderin
>>> EV's? - an analysis
>>>
>>>
>>>
>>>
>>>
>>>
>>> Around and around we go...
>>>
>>> The one big plus for LED lighting is the possibility of using a
>>> smaller/less expensive DC/DC converter.
>>>
>>> Headlight on HI = 130W
>>> Heater fan HI = 250W
>>> Misc 12V = 60W
>>> TOTAL SO FAR = 440W
>>>
>>> 4 marker lights = 5W x 4 = 20W
>>> 4 turn signals = 27W x 4 = 100W (intermittent - can use "peak power"
>>> from
>>> DC/DC)
>>> 2 brake lights = 27W x 2 = 50W
>>> 2 tail lights = 5W x 2 = 10W
>>> Center brake light = 5W = 2 = 10W
>>> TOTAL LIGHTING = 90W/190W (intermittent)
>>>
>>> So LEDs can reduce your DC/DC requirements from 530W to 450W.
>>>
>>> Adrian
>>>
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>>>
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>>
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