hetals,
?
Some more recommendations about your schematic to consider:
?
(1)? Figure out what the basic circuit should look like.? Is R2 the load?? Why does the DC power source connect to both pairs of switching transistors, and to the load?? I suspect the wire between the top of S1 and the top of S3 should not be there.
?
(2)? Tony pointed out that the gate drive waveforms are not right.
?
(3)? Consider removing the 1m resistors, R14, R11, R12, and R13.? The MOSFETs provide a low resistance connection already between their S and KS terminals.
?
(4)? Consider removing R10.
?
(5)? It looks like you wanted R8 and R9 to be capacitors.? If so, either change them to capacitors, or remove them entirely.
?
(6)? Remember that L1 already has 1 m¦¸ internally.? If you wanted L1's DC resistance to be 0 ohms, you must set it to 0.
?
(7)? Don't use UIC unless you absolutely need it.? If you need it, prepare to make some adjustments.? Two of your MOSFETs are below ambient temperature (<1¡ãC) because of UIC.? The error is small, but probably not what you wanted.
?
(8)? The other two MOSFETs run exceedingly hot.? They approach 42000¡ãC and 14000¡ãC by the end of the 1 ms simulation.? They would vaporize.
?
Andy
?
