i have circuits, in first one for ever step 4 IGBTs share the load. in second one 3 IGBTs share the load. which one is better first or second. and why ?
Your question seems to be unclair; please can you make a synoptic sheme of the circuit to allow us to undrestain your query;
In MLI,by increasing the switching levels(3 or 4) harmonics can be reduced.Mainly MLI is used for reducing harmonics.
Your question is not clear. But as I understand you have some MLI ckts wherein either 3 or 4 switches conduct for each level and share the load current.
If no. of levels are same for both converters one should prefer the ckt with 3 switch for reduced losses and higher efficiency.
@ Arun Kapoor : Yes that is what i had asked for. thanks for the clarification.
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