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How to modify square wave to modified square wave

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E

engr.waqas

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How can i modify square wave to modified square wave for 220v,50HZ output.
Can someone give me circuit diagram for this or some useful links.

Thanks in advance
 

can u give some details as to what you are trying o do?
 

Sorry 4 late response
I have designed a 24 to 220V inverter(modified square wave at 50 Hz) but i have problem when i connect my inverter to load specially fan.
When i connect fan to the inverter the voltage drops from 220 to 140 volts and fan runs very slowly and more slowly when i connect two fans.
i am not recognizing the issue.
Note that i have achieved modifying square wave.
 

What devices have you used to design the inverter? transistors? did u check their power rating?
 

Have you used freewheeelnig diodes as well? if you havent maybe you should try adding them
 

The problem probably liies with the output resistance of the transistors, try using a voltage buffer
 

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