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Old 11-22-2009, 03:33 PM   #15 (permalink)
jerpelea
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Join Date: Sep 2009
Location: Romania
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update on electronics design to lighten the car and lower the costs !

solar pannels are (180W on top of the car and 60W on the hood installed power)
due to limited car space for solar power, total is 240W/h so best charge will be 240wx8h=1920W / day

to benefit from all this energy we need to charge both packs 144v and 12v and loose lot of power on voltage conversion
pannels have 36v so an down conversion to 12v and an up conversion to 144v
the design will be complex and we thought for something else

an single pack for propulsion and electronics so car will use single battery pack for propulsion and electronix

so the new plan

an computer power supply can convert 90-240v ac to 12V/20-50A dc depending on model so we can use an computer power supply if we modify it for dc imput (remove primary ac-dc block) and create better cooling removing the case/fan and create an new case from big aluminium radiators
Also computer power supply has an conversion rate of 85-92% wich means that is better than any home built power converter
Also 30A is enough for powering the lights
70W = 2x35W HID Lamps for headlights
5W = all signal and position lights
5W = all internal lights
20W = controler board
20W = radio device
90W = Heater (very important)
40W = computer and gps (Asus Eeepc 7" converted as dash computer)
total for now 160W so less than an 400W power supply

the second improvement
usind only one battery pack we need only one converter from 36v dc solar pack to 144v dc (solar pannel has 240W so an commercial 12v dc to 110/220 ac 300W is enough)
this type of converter is used to power house electronix from an car battery in car and we need to add an ad/dc converter on the output and charge the car battery
also using this the variable 24-36v loar pannel output is converted to stable 12v and from there to 144 from this convertor

so 2 power issues are solved in theory
i will come with design updates and pictures soon !!

Last edited by jerpelea; 11-23-2009 at 05:52 AM..
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