17 Switching Losses (Worked Examples) | Power Electronics

Basics of Power Electronics - Walid Issa
17 Switching Losses (Worked Examples) | Power Electronics
• 17 Switching Losses (W...
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Thermal Calculations using LTSpice
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thermal management,thermal,power electronics,switching losses,ltspice, walid issa

[@6p1p]

Thanks you , this is simplest Switching losses equation i have seen. There is many complicate equation to calculate the switching loss is quite confused. i have a project to make 30KW input 3phase 415V and output adjustable from 0-24V up to 1000A maximum load.. i need to calculate the 2MBI200VH-120-50 IGBT switching loss to make sure the Junction temperature is not over 150C and also calculate the require heatsink . The main problem is IGBT switching losses increase when switching frequency increase.. I was thinking to operate at 16Khz but now i thinking to reduce to 8Khz or even 5Khz.

[@MM-no4eg]

Hi, why you have used average value for power calculation instead of rms value?

[@user-dt5nt9ib4q]

جزاك الله خير الدارين أخي

[@pavanraghuram1022]

Hi sir,
In the IGBT Problem . The thermal resistance of heat sink is Rth

[@jackpan4955]

Very good vedio, but this application is only for low side driver, how do you think about high side driver power loss especially the switching loss? Is it the same?

[@rajeshkanna2653]

wonderful video. Thank you.

[@khulileasherembizela3283]

Hello Sir How do I calculate or determine the duty cycle that will produce the maximum DC Battery charging current. For an Ideal switching element with no Losses. Let's say you given 5ohms and 5mH inductor and 240V Back Emf switch frequency of 2kHz and Vs=333V

[@elanali5794]

Thanks Dr. , brilliant

[@yashankar3308]

sir, in the flyback converter (or any other converter) the maximum value through inductor is iLavg+(Mean to peak ripple current),
so while calculating switching losses, we will need to consider ripple current also right? and as while deriving formula for switching losses u considered inductor current from 0 to iLmax, and in chopper we need to derive by considering iLmin to iLmax, am i right sir?

[@WalidIssaPlusE]

To consider more accurate calculations it is Yes. That is why we learn how to calculate the avg and rms for different waveforms as I mentioned in the importance of RMS lecture. Here I do approximate simple calculation