Simple 100W inverter circuit
Description.
Here is the circuit diagram of a simple 100 watt inverter using IC CD4047 and MOSFET IRF540. The circuit is simple low cost and can be even assembled on a veroboard.
CD 4047 is a low power CMOS astable/monostable multivibrator IC. Here it is wired as an astable multivibrator producing two pulse trains of 0.01s which are 180 degree out of phase at the pins 10 and 11 of the IC. Pin 10 is connected to the gate of Q1 and pin 11 is connected to the gate of Q2. Resistors R3 and R4 prevents the loading of the IC by the respective MOSFETs. When pin 10 is high Q1 conducts and current flows through the upper half of the transformer primary which accounts for the positive half of the output AC voltage. When pin 11 is high Q2 conducts and current flows through the lower half of the transformer primary in opposite direction and it accounts for the negative half of the output AC voltage.
Circuit diagram.
Notes.
- B1 can be a 12V/ 6Ah lead acid battery.
- Q1 and Q2 must be fitted to a proper heat sink.
- T1 can be a 9-0-9 V primary, 230V secondary, 150VA transformer .
- Do not expect much from this circuit. The is very simple one suitable for low grade applications.
You may also like:
sir,
i would like to do this inverter. but before that i would like to whether it is a pure sine wave inverter or square wave inverter.
thanks in advance
where can i get all parts of 40w inverter.
sugest can i get this circuit board in market.
am in chennai (tamilnadu, india)
thanks
hi, can i ask? how many ampere transformer did we need to produced 100watt for load?tnx for the follow up this question..
hi sir, thank u for sharing this ideas, looking forward for the positive output, thank u again, GOD BLESS ^^
hi sir, thank u for sharing this ideas, i have`nt try it yet, but looking forward for the positive output, thank u again, GOD BLESS ^^
Hi Haidar use minimum 120VA transformer for 100 watts load.
hi seetharaman,im already build this inverter using 12-0-12/12va at primary..it can run 40w bulb but when i use 100w bulb it not run. should i change the transformer rating?
-tq very much for your advice sir
Hi Haidar the harmonics are taken care by the output filter capacitor C4 you can increase it to 0.47uF 630V AC. This is sufficient to take care of all harmonics hence can be used with computer, Solid state TV etc (sensitive electronic gadgets)
hi seetharaman, this circuit can run tv?
and how to reduce harmonic?
Hi Haidar all resistances can e 1/4 watt. You can use 9-0-9 75 VA transformer you will get higher voltage with low loads and at rated load it will be alright. 11-0-11 120VA is the transformer which suits better.
Hi Azrin you can use 12-0-12 but output voltage will be around 200volts with 230V secondary winding and with 250V winding the output will be 220volts.
hi seetharaman ,i have 2 question
1) can i use 1watt for each resistor
2)can i use transformer 9-0-9/230 , 75va
hi sir,can i use transformer 12-0-12/230,75VA?
hence what wattage i will get?
one more question.. what transformer that u used ? and can i use 12v-0-12v transformer ?
can this inverter turn on a TV,amplifier or fans ??
Hi Kannan use the same inverter output for 3nos 23watts CFL lamps.
DEAR SIR,
plese snd me 3 cfl inverter circuet diagram
i want inverter full circuit with chaeger
Dear sir,
Please send me 3 cfl inverter circuit diagram
Thanking you,
Yours faithfully,
k.t.jayaprakash
Can you send the exact circuit diagram and its components list to my mail… Thanks
hi patil around inr500 including transformer.
how much amount required for this project except 12v battery.
Hi Nihar with a MOSFET transistor as their switch on resistance are quite low you can can use 12-0-12 transformer the right choice. dont use 9-0-9 transformer with MOSFET. use recommended transistors for 9-0-9 transformer use.
i have a 9-0-9 transformer from an old u.p.s .when i connect the transformer to the mosfet ,the mosfet becomes hot at no load condition ,output is 280 volt,when battery voltage decreases it works properly.i changed the transformer to 12-0-12 ,mosfets are not heating, the output is 220 volt .this is suitable.please tell me how can i use the 9-0-9 transformer safely . thanks in advance..
Hi Dev with 9-0-9 you will get an output of 270volts with fully charged battery, if this is acceptable you can proceed.
can i use primary 230v,secondary 9-0-9,10Amp transformer
I in a quickly way have drawn the scheme. To whom it is interesting… To this address – of a photo, a file with expansion lay- i will send on mail.http://www.photoshare.ru/photo7717869.html
Hi Zafar it should be around 8 to 10Amps for 100watts with fully charged battery. with 12 volt 7AH battery it will supply for 30mts.
plz tell me that how much current the input 12 volt battery should produce?
i am not getting out of this circuit…..how shud i get the output??
Please i want to design a 1.5Kva inverter i can i go about it please i need ur help it’s for my final year project or better still a 1.5kva ups
is this a working inverter’s circuit diagram
This is a squarewave inverter
also tell me how to categorise it , a sine wave inverter or some other .
hi, i have made this circuit at the pcb board(holed).
the current is passing through IC but there isnt any output at secondry winding of transformer . even that ihave checked the ckt. thrice and there isnt any mistake in connections . none of the joints is loose and each of them have been soldered. also please let me know an alternate transformer (with its current and voltage ratings) that can be used in same citcuit without alterations.please respond soon .also please send me its block diagram, would be really helpfull.
Hi Neo the battery voltage is switched on alternately to the primary of the transformer. The switching device is MOSFET the drop across them is negligible hence full battery voltage will be available across primary winding. if the transformer is 9 volt with 9 volt output will be 230volt square wave if it is 12 volt you will have 33% higher voltage at the output. without load you will get around 300 volt square wave.
Hi, I don’t know much about power electronics. I build this circuit with 9-0-9 v primary and 230 v secondary (115-0-115)transformer.
I get output 240 v at secondary when I connect center tap of primary to 11 v and much higher when connected to 12 v. what is this relationship, is there a formula that I can use to work out what voltage center tap should be connected for this type of transformer.
Thxs
Hi Sankalp CD4047 is a CMOS IC iy can give an output of around 1mA which is not sufficient to drive the transformer directly, hence you require transistor take care of the high current drive to the transformer. The MOSFETs used are enhancement type they require bias to conduct. These devices require voltage drive ( around 2.5 to 4 volt)with very little current. cmos IC can take care of this.
Hey, I tried to build that circuit. It’s the same problem again. Getting output pulses from the CD4047 IC but ultimately, getting nothing at the end…
and can anyone explain to me the working of the mosfets? I mean if i’m getting 23V AC from the 4047, Why not just connect it to the transformer directly??
anyone here can make a circuit 1.5V input and the output is 9V 1Ampere. Tnx a lot!
how many types of inverter are there?
what is the use of mosfet in the inverter circuit and explain about its working?
What is your exact problem, please clarify it.
lp-100g i need data book
iam a problem in inverter LP-100G 15HP chaingae(company) i wanna to compelet information about it plz reply me as soon as possible…..
Thxs VYSakh for ur reply, checked the mosfets pin connection, its not that.
I even checked mosfets on thier own with 12v input to gate with source grounded but got no output at the load at drain ?
check mosfet pin connections
Hi, tried to build this circuit on breadboard, got output pulses from cd 4047 but not from mosfets. They are not switching on and off, any clues
Hi Seetharaman,tnx for ur quick responsed,i appreciate it so much,for this i gained more info on how your circuits work!!tnx for the additonal websites,,now i am searching parts,first for the transformer for this project.tnx GODBLESS.
Hi Darren you have to take saturation voltage of the final power transistor at 5 amps say it is 2 volt you require a 12 – 2 = 10 volt transformer (10-0-10). if you use 12 volt you will get 10 to 15% less out put voltage, if that is ok you can go ahead..
Hi Darren you can use 2nos mosfets in parallel or even more. you may have to add a driver transistor in between. Something similar to the following circuit
http://www.high-voltage-lab.com/72/500w-low-cost-12v-to-220v-inverter
http://electronics-diy.com/electronic_schematic.php?id=869
http://electronics-diy.com/electronic_schematic.php?id=899
hi Seetharaman,definitely i can use more higher mosfet ryt?is it ok to use 6amp transformer?if not available 9-0-9,can i use 12-0-12 centertap x’former??..tnx.i need this circuit soon…GODBLESS
i want to know more about this inverter…..pls forward me a block diagram and detailed writeup…
Hi Shashi One ceiling fan say 48″ it will consume 90watts, two CFL 18 watts so total requirement is 108watts say inverter efficiency is 85%. Then the primary requirement is 108 / 0.8 = 135VA if the battery voltage is 12 then the current requirement will be 11.25Amp. your battery capacity is 7AH so if draw 7amps it will supply for 1hr approx so if you draw 11.25 amps the battery can supply for 35 minutes. hence your back up will be for appoximately 35minutes
Plz give it’s Backup Details with 12v, 7Ah battery with using one ceiling fan & two cfl bulbs of 9 watts each.
Hi Pravpa you can use the standard step down transformers for stepping up no need for any special type.
a normal transformer which we use for power supply can it be used reserved side or need spl. type transformer for inverters, please explain..
from the old uninterruptible power supply.
is the 9-0-9v 8.5amp transformer is best or the 17amp??
Hi Adnan 150 / 9 = 17amps total each 9 volt winding should be capable of 8.5amps
9-0-9v at 150va tell me how much ampere of transformer will required?
khan, its a sqre wave
max provide 100w load
on 100 watts load how much backup time will the battery give?
9-0-9V,150VA transformer
how much ampere of transformer please tell me?
it is use for 2 fan & one tube light plz tell me
Please tell me its output wave, sine,square or other ???