DIY Electric Car Forums banner

1 - 1 of 1 Posts

·
Registered
Joined
·
70 Posts
Discussion Starter #1
Re: [EVDL] LED Taillights - a money saver in gas cars? ->rangeextenderin EV's? - an a

Well the other thing to remember is that while the old power supplies
always turned on when power is applied, the newer ones turn on when the
PC comes out of sleep mode. Like your PC is always plugged in and the
power switch is on but you press a button on front and the electronics
tell the supply to turn on.

Unfortunately the older, simpler supplies are also lower current than
the new ones. I'm not sure if the newer ones are simply a matter of
connecting 2 wires or what.

Danny

(-Phil-) wrote:

>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
>>>
>>>_______________________________________________
>>>For subscription options, see
>>>http://lists.sjsu.edu/mailman/listinfo/ev
>>>
>>>
>>>_______________________________________________
>>>For subscription options, see
>>>http://lists.sjsu.edu/mailman/listinfo/ev
>>>
>>>
>>>
>>_______________________________________________
>>For subscription options, see
>>http://lists.sjsu.edu/mailman/listinfo/ev
>>
>>
>>
>
>_______________________________________________
>For subscription options, see
>http://lists.sjsu.edu/mailman/listinfo/ev
>
>
>

_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
 
1 - 1 of 1 Posts
Top