Different Kinds of Circuit Designs for the Inverter:

1) Inverter Using IGBT:
Inverter can be made by using the IGBT (Insulated Gate Bipolar Transistor). By using IGBT we can easily convert the DC source to the sinusoidal wave and the power can be increased by using the MOSFET's. The different kind of designs using IGBT are given below.

Figure 3 Simple inverter circuit Using IGBT

The Gate pulse should be in the form of 0,1 and we can use square wave generator for gate pulse generation which can be easily made with the help of 555 timer IC and for increasing power we can connect the combinations of MOSFET's before the output transformer. The output wave form for the above circuit is given below in figure 4

Figure 4 "Output wave form of the Circuit shown in Fig 3"

2) Inverter Using Op-Amp:
Inverter can be made by using the Op-Amp but the output wave form obtained will be modified sine wave. The simple design of inverter using Op-Amp is given in the figure 5. In the design given below we use 555 timer IC to generate the Square wave then use an Op-Amp to convert the square wave into triangular wave than finally it will be converted to sine wave but the output wave is modified sine wave. Frequency can be varied by using the potentiometer.

Figure 5 Inverter using 555 timer IC and Op-Amp's

The output wave form of the circuit in figure 5 is given below in the figure 6

Figure 6 "Output wave form of circuit in Figure 5"

Note: "Procedure of calculating the output wattage and the making of inverter using micro-controllers will be given in the next post."