Mehrdad Posted August 3, 2006 Report Share Posted August 3, 2006 Hello.I need A Ups Schematic To Build.Can Anyone help me please????? Quote Link to comment Share on other sites More sharing options...
ZomBiE Posted August 3, 2006 Report Share Posted August 3, 2006 start with the principles of building electronics... If you want a complete ups, this place isn't for you. If i can tell. Im sorry, but i think that no-one will help you to build a UPS from scratch for just a hobby. Quote Link to comment Share on other sites More sharing options...
Theatronics Posted August 10, 2006 Report Share Posted August 10, 2006 An entire schematic with parts would fill several pages.The basics of a UPS are just a two units.- a charger to keep the batteries topped off.- a Inverter to change the power from DC to AC.The charger isn't to complex.The Inverter is the tricky part.All an inverter does is create a sine wave (usually 50/60hz)then feed that sine wave into a very high power amplifier.If you want 120V AC at 60Hz then build a push/pull (Half bridge)amplifier that can supply the needed current (or wattage)The trick is to drive the amp with only the battery power.A hint, Most UPS systems use 48V batteries (Four 12V's in series)If you swing that through a transformer forward then negative you canget 48Vpp or 73Vac.If your transformer can handle bumping that up 3:5 ratio then you have120V.If this still sounds like something you REALLY want to try then you will needto define a few basics first. How much power do you need. How long does the UPS need to run, Is the UPS a pass-though or a fail over design, Will you be driving resistive or inductive loads, and why would you want to build a UPS in the first place?Answer these and I'll help some more.-Mike Quote Link to comment Share on other sites More sharing options...
Gazza Posted October 23, 2006 Report Share Posted October 23, 2006 Woirking in the Power Electronics and Power Quality field, I deal with UPS's all of the time.Even a small 500VA UPS is a very complicated machine.It is not designed in two parts, it actually has many more pieces than that. Since most modern UPS's are "online" I will include a block diagram for one.This diagram is over simplified. It is missing the boost circuit and all of the PWM control. Not to mention the fact that the rectifier is a 12 pulse SCR bridge.Good Luck :) Quote Link to comment Share on other sites More sharing options...
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