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PWM based UPS Inverter 24V

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abcqasim

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I am working on 24v UPS Design and i have also make the design and also i have generate 240Vac buy 24V but the problem which i am facing is Mosfet gradually heat up when i connect transformer (at No Load) but output voltage still maintain itself at 240Vac, i have make many efforts to solve this heating problem but till now unsuccessful. I have share the schematic, source code as well as waveform screen shot so kindly take a deep look and help me in finding problem either in hardware or software

For testing i have used;
Stepup transformer 12+12 to 220Vac
24V SMPS in place of battery
 

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    UPS Update.JPG
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Are you providing proper dead-time between each PWM chanel ?

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