Igbt eka athule use keranna bjt eka NPN de PNP de kiyanna eka anuwa igbts category kerala nadda sir ?
@TangoMikePapa2 жыл бұрын
Very clear, short and sweet. As always. Can you send me a few pics of your recording setup Dilshan? I am thinking starting small
@dilshan19712 жыл бұрын
Will do TMP, Tks for the kind comment
@nela_tech2 жыл бұрын
sir. very important lesson for technician like us. actually I am just asking. what is the more power full component two of these? i mean power inverters & welding machines? most manufactures using IGBTs for these machines .is there any reason for it? please explain.
@dilshan19712 жыл бұрын
They are used for different situations,mosfets are better at high frequencies so they are used on the primary side, where they can be paralleled to get a higher current. Whereas IGBTs can handle higher currents at lower frequencies so they are used on the Inverter Hbridge. However,,, with the rapid developments of the technology none of these statements hold true for very long.
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@christopherschokman16042 жыл бұрын
Thank you for another informative video.When it comes to inverter circuits is the reason for IGBT's used on the secondary ( output side) cause the frequency is lower?If IGBT's have the best of FET's and BJT's why arn't they used in both primary & secondary sides? Thanks
@dilshan19712 жыл бұрын
Frequency is just one reason IGBTs are used on secondary only. Other reason is... at low voltages, Vce(sat) voltage drop is significant leading to higher powerloss. Therefore FETs are preffered becuase of their very low Rds.
@christopherschokman16042 жыл бұрын
@@dilshan1971 Thank you, one last question a common complaint even with the inverter model in your repair video is that the battery terminals get energised with a high voltage and you get shocked if you touch the + or - batt. terminals.Why is this? Any work around to fix and make it safe.Thanks
@dilshan19712 жыл бұрын
@@christopherschokman1604 these inverters are not meant to be plugged into the home utility system, if you see the advertisment on these inverters some of them mention "Car Inverters" which is what they are. Your home utility system connects the neutral with the ground, so if you inverter ground is connected to the negative terminal of the battery, then the battery gets enegized by AC. But this differs from model to model.
@tashinavimukthi5212 Жыл бұрын
Sir mage laga theyennawa maximum 250Amps ganna puluwan inverter welding plant ekak. Eke use kerala theyenne igbt ne.. ethakota ai MOSFET use kerala naththe?.. MOSFET wala igbt tharam Wath resistance ekak Naha ne... Igbt use kerama V(ce sat) nisa loku power ekak igbt eka through discipate wennawa ne.... Mokade danne naha e wage high current application walata use Kele.. igbt ? Anika thami sir mn hybrid car ekaka inverter eka galuwa eketh use kerala thibbe half bridge configuration ekata hadapu igbts ne... 😮
@tashinavimukthi5212 Жыл бұрын
Sir igbt kiyanne BJT eketh MOSFET eketh combination ekak ne.. oya vidihata voltage eka drop wennawamai nm igbt walala advantage eka mokak de sir ?