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  1. K

    12 V DC to a 220V AC Inverter AMplfier Design

    hi au, i wan to ask u something....do the copper in the pcb board must have a thicker width? since the mosfet drain a quite high current... is about 16 amps....or double for modified sine wave? if it have thinner width will it affect the efficiency of the inverter? thanks again
  2. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au , i think i get what u mean if this is correct,  the input and output of the transfomer is calculated using Vrms or so call average value? so in order to get the Vrms in the transfomer we need to 12V/square root 2 = 8.5V in the primary winding of the transfomer? so we can get the...
  3. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au, on what gound u state that i shold use the 8.5-0-8.5 to 220V to get the Vpeak for the output of the transformer? as i know output of the transformer is Vrms? u stated that in order to get Vpeak at the output , the value for the inverter the input of the transformer winding is...
  4. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, i think i can use this mosfet rite? IRFZ48NPbF i will attach the datasheet for your reference....thanks
  5. K

    12 V DC to a 220V AC Inverter AMplfier Design

    hi au, can u pls gimme the link? i go and find myself :P thanks cos i need to create the inverter as small as i can
  6. K

    12 V DC to a 220V AC Inverter AMplfier Design

    hi Au, can u recommen any better mosfet? thanks
  7. K

    12 V DC to a 220V AC Inverter AMplfier Design

    hi Au, the IRF 540 mosfet only can withstand 23A only, then i need 3 mosfet on each side to withstand that large current or just simply 1 mosfet at each side cos 150W divided 12=15.7A???
  8. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, can this step down transformer works? my friend had tried this method and it seems doesnt works.... i have ask the shopkeeper here...they said can make a step up transformer for which is custom made... i need the power of 150watts... now i become more confuse on the amps needed for me...
  9. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, what u mean by this? i cant understand....last time u called me to buy a step up transformer...now u said i need a step down transformer???
  10. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, i found from one of the inverter side and they given some formula which they have different calculations from you which is: 1) to convert amps to watt: multiply: amps*220(ac voltage)= watts which is my amps for the transformer will be approximately become 0.68amps for example, u...
  11. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, sorry for my mistake, actually i need a transformer with 150W continous output, the rating for my transfomer is (8.5 to 8.5V) how about the amps i should buy for the transformer? izzit still the same 31.4amps? thanks  ;D ;D
  12. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear au, means that the output of the modified square wave will be a Vrms value? from the we multiply by square root of 2 to get the peak value? means 230 from the output of the transformer will multiply with square root 2 to get the peak value? what do u mean by this statement? how do you...
  13. K

    12 V DC to a 220V AC Inverter AMplfier Design

    deat au, yeah...wait i reattach the picture of the schematic to you pls give some comment and guide to me.... ;D ;D thanks
  14. K

    12 V DC to a 220V AC Inverter AMplfier Design

    hi Au, yeah that's is what i want....can i implement it in the circuit with the cd4047 and cd4001? as i know the peak voltage of the sine wave is square root of 2 larger than the square wave....so which transformer i need to buy? (10-0-10) or the (12-0-12)? thanks
  15. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au, so the transformer i need is the center tapped transformer(12-0-12 to 220V) with 15.7A multiply 2=31.4 or higher amps step up transformer for which to have continous power of 150W and surge capability of 300W with the overloading protection fuse (300W) to meet all my requirement...
  16. K

    12 V DC to a 220V AC Inverter AMplfier Design

    Dear AU, the surge capability is the amount of the voltage needed to start an appliance....Multiply: WATTS X 2 = Starting Load, for inverter of output has 150W need to have a surge capabilty of 300W. how can i archieve that? by increasing the transfomer higher rating amps? (buy transformer that...
  17. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au, can i know how much the current will flow to turn on the mosfet for switchin? and if i wan to get an output for 150W but not 600W but using the same circuit can it make it? as i know if i buy a smaller transformer as i asked the shopkeeper, the battery which supply 50A to the...
  18. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au, i know the transformer with small amps couldnt power anything....but the transformer with higer amps is very expensive in my country.....mayb i will use it for small applications such as charging my handphone or something else which need small amps.....do u think its ok? thanks
  19. K

    12 V DC to a 220V AC Inverter AMplfier Design

    Dear Au, thanks for your explaination, can i buy transformer with lower amps? such as 12va or 30va for this circuit?
  20. K

    12 V DC to a 220V AC Inverter AMplfier Design

    dear Au, means that the mosfet will draw 50A from the battery and each of the mosfet can withstand a current of 23A, so the current from battery will 50A divided by 3 mosfet so each of them draw 16.7A from the battry? is this what u mean?  about the heating power ....how u know i will dissipate...
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