Hi all,

Does anyone know how to calculate Losses in Inverter and how to select Mosfets for Single Phase Inverter?

Thanks,
Kunal.

 

Usually switching losses are a high proportion of the total so modelling is essential.
As for device selection, try voltage, current, RDSON & package

 

Fast switching is essential to minimize switching losses, since it's during the transition time between on/off that much of the loss typically occurs.
To minimize that you need to drive the high gate capacitance with high current drive.

Another loss is the through the ON-resistance of the MOSFET.
.
Thus you want a MOSFET with a low ON-resistance along with a relatively low gate charge to make it easier to drive and switch rapidly.

 

.Thus you want a MOSFET with a low ON-resistance along with a relatively low gate charge to make it easier to drive and switch rapidly.

Unfortunately both dependent upon die area in opposite directions, I hate reality, where is my perfect power mosfet (Actually in modelling I often use a voltage controlled switch)!

 

Unfortunately both dependent upon die area in opposite directions, I hate reality, where is my perfect power mosfet

Of course they are.
But newer MOSFETs have a lower gate charge for a given ON-resistance as compared to older designs.