This simple low power dc to ac inverter (dc to ac converter) circuit converts 12V DC to 230V or 110V AC. By doing simple modification you can also convert 6V DC to 230V AC or 110V AC. It can be used as inverters for home needs to enable light loads (electric bulb, CFL, etc) at the time of electricity failure. You can construct this circuit of simple inverter at a cheap rate with locally available components. Use a 12V rechargeable battery and battery charging circuit for this dc to ac inverter. We have already posted the circuit for battery charger.
Also Read:
Also Read:
Circuit diagram of DC to AC Inverter Circuit
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(Click on the image for enlarged view)
Components required for DC to AC Inverter
- IC CD4047
- Resistors (1K, 18K, 100Ω- 0.5W x 2)
- Capacitor (0.22µF)
- 12V rechargeable battery
- Battery charger circuit(Published before)
- IRFZ44 MOSFET x 2
- Step Down Transformer (230V primary 12V-0-12V, 5A secondary) (110V to 12V-0-12V, 5A can also be used) NB:- Transformer connection inverted
Working of DC to AC Inverter
- You must use a battery and battery charger to implement this inverter circuit. Battery charging circuit is described in our previous post.
- The inverter circuit is built around IC CD4047 which is wired as astable multivibrator.
- The operating frequency of astable multivibrator is set to 50Hz.
- The power MOSFETs IRFZ44 are directly driven by the Q and Q’ output of CD4047.
- The power MOSFETs are connected in Push Pull configuration (Power amplifier). The MOSFETs will switch according to the pulse from CD4047 astable multivibrator.
- Thus an AC voltage is transferred to the primary of transformer; it is stepped up to 230V.
- The transformer used here is an ordinary step down transformer which is connected in inverted manner. That is, the primary of a 230V to 12V-0-12V step down transformer can be treated as secondary for this inverter project.
- If you would like to get 110V AC, choose 110V to 12V-0-12V step down transformer in reversed way. (That is primary as secondary and secondary as primary)
- The inverter output is filtered by capacitor C2.
- Use suitable heat sinks for MOSFETs.
Here is the tested and verified inverter circuit that I have made, for those who doubt working of the circuit. ;)
Pin out of IRFZ44 and CD4047 IC
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if i connect the secondary wires of the transformer to the alternating current what will happen by plugin does the battery get automatically charged or not?
ReplyDeleteHi,
DeleteNo,it not possible to do so, you have to connect separate charger circuit for it, it may damage your circuit.
hi,i'm george thong here,from malaysia,may i know the 12v dc can directly connect to the car battery?
Deletethanks for your info & helping,thank you.
I want to build this circuit for a simple application - to drive a small aerator for an extenal fishpond. Later, I will then add a small solar panel.
ReplyDeleteWhen sourcing the resistors I came across a puzzle. Surely, the resistance is a property of the device independant of the voltage rating (within limits). When trying to source the variable resistor (trimmer or potentiometer) one of the specifications is the wattage rating. None of them that I have seen allow a 22k ohm resistance at 12 Volts. Am I being too clever (knowing Ohm's Law)
hii
ReplyDeletei am GAURAV SHETA. this circuit how many watt withstand?? and how many prize of this circuit??
Hi GAURAV,
DeleteThis circuit can handle 150 watts if 12.5A transformer is used.
The circuit cost around Rs.190 without transformer. With 5A transformer it can handle 60 Watts.
hi admin will the reverse of the transformer not burn the winding?
ReplyDeleteHi Ronoh,
DeleteIt will not burn the winding as output of the inverter is 12V AC.
is this circuit really working??? rep as soon as possible?
ReplyDeleteThis circuit is 100% tested and verified under i-St@r Lab. Also I have uploaded an image of the inverter that I have made.
Deletesir,,is overload affect the circuit?
ReplyDeleteHi Jithu,
DeleteOverload will damage the MOSFET and it may get burst. As per the above circuit diagram, it can handle only upto 60 watts load. It can be increased upto a maximum of 150 watts if 12.5A transformer is used.
Hi admin, do you know which is the power conversion efficiency with 60W output load?
ReplyDeleteSir,can i use 9-0-9,2A Transformer?
ReplyDeleteHi karunaga,
DeleteSure you can but power efficiency will be decreased.
how can i increase the power up to 500watts
ReplyDeleteBe careful, connect 6 MOSFET in parallel with 500 watts inverter transformer.
Deletehow long will the 150watt inverter drive 100watt load with the full charged battery
ReplyDeletePlease specify the ah of the battery you are using and next time use your name while commenting for better response.
Deletesir may i use this circuit to operate fan????? is this circuit can load fan???? does there any damage in circuit from the fan as load???
ReplyDeleteHi Parth Patel
DeleteYou can use this circuit to operate fan but, Normally fan drawn 75 watts so you should use minimum of 7A transformer, 10A transformer is available.
Can you tell me, what is the potentiometer used for? Thanks.
ReplyDeleteHi Gus.
DeletePotentiometer is used to set the frequency 50Hz.
sir, how long will the 150watt inverter drive 100watt load with the full charged 12volt/75ah battery
ReplyDeletewhat Amps of transformer can be used to get 500watts output
ReplyDeleteif i put 11w cfl bulb as load,what is the maximum hour of burning and what is the ah of the battery you have used in this circuit?
ReplyDeleteSir my i/p is 230 v and give o/p is increesh step by step (110v,150v,180v,200v,and230v) a it fully atomatic
ReplyDeleteHi,
DeleteYou will have to use tapped transformer for that purpose
Hello sir My Self Anand,
ReplyDeleteSir, Can I use 10A transformer to operate "one 18Watt bulb and one Fan"? and how long
it will drive with this load? and one more thing why you repleced potentiometer with
resisters?
and the Battery Rating is "12V,9ah".
Hi Anand,
DeleteNice to see you here. Yes 10A transformer can be used for operating the above mentioned things. With 12V,9Ah battery it can operate for less than 1 hour.
We have replaced the pot with resistors for simplicity and to reduce the cost.
sir,300w transformer using meance any change doing in this circuit.
ReplyDeleteHi Flying,
DeleteYes, you will have to make alterations. Number of Mosfets used should be increased.
How to simulate the circuit And what is the program use?
ReplyDeletein the circuit diagram there is no c2 capacitor
ReplyDeleteHi Aswin,
DeleteIt's not necessary to get output.
sir,
ReplyDeletehow can i add overload protection to the above circuit?..suppose if i give load above 150w i need the circuit to cutoff the load without damaging the mosfets..plz help me with it...
thanks in advance
Eldhose
capaitor 0.22uf howmuch voltage will required?
ReplyDeleteUse 2 ordinary 0.1uf disc capacitors in parallel.
Deletepls can u upload 3kv circuit
ReplyDeleteHow do I have to connect the output to obtain 12 volts AC?
ReplyDeleteCan I obtain 3 volts AC by charging the circuit with 3 volts DC?
The same for 16 volts? What would the range limits be?
Thank you very much,
Juan
Hi,
Delete1)To obtain 12 volts AC, take output from Vcc and either of the drains of power mosfet after connecting transformer.
2)Yes you can get 3volts AC like that.
3)Min 3V and max 18 V
But keep care to use exact matching transformers accordingly.
If the gate input to both mosfets is high, wont it short circuit the primary end of the transformer??
ReplyDeleteHi Malvika,
DeleteYes it will short circuit and burst.
Hi am ken miles. Can i use any other capacitor apart from a 0.22miro farad capacitor?
ReplyDeleteUse 2 ordinary 0.1uf disc capacitors in parallel.
DeleteSir is it possible with 9v battery?
ReplyDeletepls repy its urgent.
Hi Adarsh,
DeleteYes you can use 9v battery, but use 9-0-9 transformer. For better output high capacity batteries(high ah) are required. 9v high ah batteries are not commonly available.
hi admin, i need inverter circuit of 3v dc to 9v/12v ac. while i will connect AA battery as 3v source it will charge automatically.plz suggest me.
ReplyDelete