Hi Everyone,
I am working on an inverter for my final project at university. I have problem with ringing on mosfet's high side.Is there a way to eliminate those ringings?Why is it only in high side ?

 

Such ringing is usually addressed with a snubber and/or by adding resistance between the gate driver and gate.

 

It could be caused by a number of things. If you show a diagram of your circuit and let us know what the load is, we may be able to identify the cause.
Keith

 

MOD NOTE: Moved to Homework Help.

 

Is the ringing a problem or just something you don't like?

 

Is the ringing a problem or just something you don't like?

when i apply more than 20 volts, half cycle of the sine wave is distorted.

 

Here the schematic is. Switching frequency is 50khz.

 

I see no power supply decoupling capacitors in the circuit.
Do you have any?

 

I see no power supply decoupling capacitors in the circuit.
Do you have any?

I actually used once. But, somehow it increased the distortion/ringings.

 

I actually used once. But, somehow it increased the distortion/ringings.

Then they were connected wrong.
A properly used decoupling capacitor will not make the circuit performance worse.

Do you have a ground plane or high quality ground for the circuit?
How is the circuit fabricated?
If it's on a plug-in or poorly laid out breadboard, then you can have the problems you see.
A careful layout and ground configuration is needed for such a high-current, high-frequency circuit.

For such a circuit, the circuit design is only half the task.
The other half is proper layout and fabrication.