Calculating losses and Mosfet selection for Single Phase Inverter

Deleted member 440916

Joined Dec 31, 1969
0
Usually switching losses are a high proportion of the total so modelling is essential.
As for device selection, try voltage, current, RDSON & package :)
 

crutschow

Joined Mar 14, 2008
27,945
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.
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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.
 

Deleted member 440916

Joined Dec 31, 1969
0
.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)!
 
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