Hello, everyone the instructable here in this post is a 60watt homemade inverter. Inverters are of 2 types mainly square wave and sinewave. The design discussed here is a powerful 12V- 220V AC inverter, 60w square wave inverter. This inverter is capable of powering CFLs, tube lights, dc fan ext. it can handle up to 150W. Even you can charge your laptop and mobile. Powerful 12V-220V AC inverter. DC 12v to 220v ac inverter.Simple inverter circuit. Powerful 12V-220V AC inverter
Note: this is a 220v, 50Hz square wave inverter
INVERTERS ARE DEVICES THAT CONVERTS 12V OR 24 V DC VOLTAGE FROM A BATTERY TO AC AND PROVIDES US stepped up output as 220V/110V AC.SUPPLY DURING THE ELECTRICITY CUTOFF(also known as UPS).
How does an inverter works?
DIFFERENT POWER STAGES / COMPONENTS OF AN INVERTER
1.INPUT STAGE:- An inverter requires 12v DC or 24V DC input from a powerful long-run battery with sufficient amperes ratings according to the power requirements.
2.DC TO AC CONVERSION OR OSCILLATOR STAGE:- In this stage, the dc input from the battery is converted to AC via an a-stable Oscillator circuit. An oscillator is a device or a circuit that converts unidirectional current flow from a DC source like a battery to an alternating waveform of some desired frequency.
3.STEP UP OR VOLTAGE STEPUP STAGE:– After the DC has been converted to AC, now the converted ac voltage needs to be stepped up to 220/110v ac for domestic use. THIS COULD BE DONE USING A POWER TRANSFORMER THAT COULD BE ENOUGH TO HANDLE THE LOAD.
MATERIALS AND COMPONENTS:-
- Transistor 2n2222a or BC547 -2pcs
- capacitor 1uf – 2pcs
- MOSFET IRF540N – 2pcs
- 12v 10 or 7.6 AH Lead Acid battery
- 12-0-12 5AMP To 10Amp Transformer
- heat sinks – 2pcs separately used for both MOSFETs
- RESISTOR(R2&R3) 12K or 10k – 2PCS
- RESISTOR(R1&R4) 680 Ohm – 2 pcs
- Misc : wires,tapes,switchboard ,battery clips,multimeter,soldering iron,etc.
- GENERAL PURPOSE PCB – 1 pcs
- Transformer 12-0-12 5amp to 8amp. will be used as reversed for a step up
THE CIRCUIT DIAGRAM
How does this inverter works
- The design here is using an astable multivibrator (also known as a free-running oscillator) as an oscillator for generating square wave pulses at a 50-60hz frequency,
- The square wave pulses generated from low power 2n2222a transistor are fed to N-CHANNEL MOSFETS for amplification of power. Finally, the generated AC POWER is fed to the 12v side of the power transformer and stepped up to 220v or 110v ac (as per your country specification).
- I have also employed a battery charging circuit(about which we will discuss some other day) in this that can charge the battery effectively. This inverter is not designed to have an Auto cutoff feature.
- The circuit discussed here has a maximum rating of 60 watts load if you use 12-0-12 5 ampere transformer and 90 watts max if you use 12-0-12 8 Amp transformer.
- Even though the 60 watts design is enough to operate most of the CFLs, Tubelights, Table fans, Mobile phone chargers, etc. for a long duration.
- After you have made the circuit as shown in the diagram, then connect the battery input as shown in the circuit diagram and test the output voltage with an AC voltmeter OR a Multimeter. If it shows 220v to 230v AC output then your inverter is good and then try to connect a 15w CFL or any bulb or mobile phone charger to test whether the inverter is serving its purpose or not. Never exceed the MAX. rated wattage of an inverter.
*SOME KEY POINTS*
- *INPUT POWER = OUTPUT POWER
- *OUTPUT POWER = VOLTAGE*O/P CURRENT across device
- *Backup time depends upon Battery ah value as,
- *Total available power(Ah*Vin) / load power requirement=backup time(in hours)
- * Output VOLTAGE INCREASES, CURRENT DECREASES
these are key points
NOTE:- THE CIRCUIT DIAGRAM HERE IS PRACTICALLY TESTED BY MYSELF AND WORKS PERFECTLY.
ALWAYS BE SAFE, MAKE SURE YOU never HURT YOURSELF OR ANYONE ELSE.
AC MAINS VOLTAGE ARE VERY DANGEROUS, BE SMART, BE SAFE.
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