Low Cost 100W Inverter

Here is a 100 Watt inverter circuit using minimum number of components.I think it is quite difficult to make a decent one like this with further less components.Here we use CD 4047 IC from Texas Instruments for generating the 100 Hz  pulses  and four 2N3055 transistors for driving the load.
The IC1 Cd4047 wired as an astable multivibrator produces two 180 degree out of phase 100 Hz pulse trains.These pulse trains are  preamplifed by the two TIP122 transistors.The out puts of the TIP 122 transistors are amplified by four 2N 3055 transistors (two transistors for each half cycle) to drive the inverter transformer.The 220V AC will be available at the secondary of the transformer.Nothing complex just the elementary inverter principle and the circuit works great for small loads like a few bulbs or fans.If you need just a low cost inverter in the region of 100 W,then this is the best.

Notes.

• A 12 V car battery can be used as the 12V source.

• Use the POT R1 to set the output frequency to50Hz.

• For the transformer get a 9-0-9 V , 10A step down transformer.But here the 9-0-9 V winding will be the primary and 220V winding will be the secondary.

• If you could not get a 10A rated transformer , don’t worry a 5A one will be just enough. But the allowed out put power will be reduced to 60W.

• Use a 10 A fuse in series with the battery as shown in circuit.

• Mount the IC on an IC holder (socket).

• Remember,this circuit is nothing when compared to advanced PWM inverters.This is a low cost circuit meant for low scale applications.

The maximum allowed output power of an inverter depends on two factors.The maximum current rating of the transformer primary and the current rating of the driving transistors.
For example ,to get a 100 Watt output using 12 V car battery the primary current will be ~8A ,(100/12) because P=VxI.So the primary of transformer must be rated above 8A.
Also here ,each final driver transistors must be rated above 4A. Here two will be conducting parallel in each half cycle, so I=8/2 = 4A .
These are only rough calculations and enough for this circuit.

Source: circuitstoday.com

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1. How to make a simple inverter
2. Inverter 100W with IC 4047

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Inverter Energy Source

In essence, there’s a couple different types of electric powered energy inside Globe: DC (Strength) in addition to switching AC current (AC). DC actions continuously from the advantageous power write-up on the negative electric submit. Changing electric energy operates forwards and backwards concerning the some articles. Electricity current occur in Character and as well battery pack packages, though Heating and air conditioning pre-existing might be man-made plus items electrical energy above the average person energy electric company which usually makes it possible for person company in conjunction with features. Vehicle battery packs found a problem before once we acknowledged many people wished to functions usually AC-powered products within their autos however often definitely not do this due to incompatible newest technical specs. Manufacturers like Vector altered to the site resolve this kind of difficulty by means of gelling having fashion motor vehicle energy inverters that could appropriately and as well properly adjust Digital camera that you should AC. Their own worthwhile design and style presents resulted in quite a few stream-lined, square items that talk with battery power bags in addition to effect the coming switching ac current properly through several regular strength links.

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Yet another brand-new development that enables car electricity inverters to use a lot more stableness than ever would be the superior Delicate Begin Technological know-how, manufacturer “SST” just by corporations one example is Vector. SST transpires inside progression of techniques energy inverters perform. The first energy inverters with regards to cars may just accomplish often throughout awesome core commences. Simply because couldn’t get sufficient electrical energy inside battery, they could turn off from pre-existing under load as well as have to have a manual reboot your computer. SST gets rid of that issue by just continuously expanding recent raise during generator new venture corporation. Once the end result declines for any excuse, SST would make quick changes in compensation and definitely will minimize numerous shutdowns. As soon as in the extraordinary functionality just about any banned can easily occur, your modern day automobile electric power inverters execute repeatedly so that you can system themselves devoid of frustrating the trucker from the motorway.

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Inverter 100W with IC 4047

This is a schematic inverter 100W, to produce 100W of power we use 12V10A car battery. R1 is a potentiometer that is used to set the output frequency to be at 50-60 Hz, which the inverter will be used for our home electronics. If only to try, you can use the step-down transformer CT in reverse, the input at 9V-0-9V and the output at 220V. Transformer 10A that we must use in order to produce 100W of power. This Circuit is built with a 4047 to generate pulse, two of 2N3055 and a transformer  to increase power. You can replace the transistor with other transistor if have a same spec.

list of components:
IC 1        4047
R1          250K Potensiometer
C1          0.022uF/25V
R2,R3    10 ohm, 5 watt resistor
C2,C3    68 uF/25V Tantalum Capacitor
Q1,Q2    2N3055 NPN Transistor
TR1        see text

This inverter can be designed to produce greater power in a way by substituting transistors and transformers (power stage) are more powerful components.
Note: use a heat sink to each transistor for a good performance 

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