90. IGBT Theory and Testing
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- เผยแพร่เมื่อ 1 มิ.ย. 2024
- An overview of Insulated Gate Bipolar Transistors. we take a look at some theory, where and when to use an IGBT, how to test one with a DMM, and two experiments checking parameters from a data sheet.
At 14:54 I should have said milliohms or or a few siemens. - วิทยาศาสตร์และเทคโนโลยี
Great video. I can see how these devices can be used to control some pretty high power. And you demonstrate nicely how the gate voltage must be actively driven both up and down to control properly. Thanks.
I really enjoyed your excellent video. I just started to swapping from MOS FET to IGBT FET on Joule Thief or Joule Ringer.
According to your video, I understood some concerns about the gate control.
This 36 minute video has taken me at least 2 hours to watch and understand so far. very helpful, but there is a lot here.
very underrated comment mate
Great video sir, it helped me to understand a lot.
Thank you.
Great explanation on igbt structure and characteristics. Thanks!
Glad it was helpful!
I'm learning power electronics. Your video is very helpful. Thanks, and I'm looking forward to your next videos.
Thanks for watching!
In chapter 1, IGBT overview, the device terminal and drawing is confusing because the collector has the arrow pointing in versus in chapter 2, Forward blocking Mode, the emitter gets the arrow pointing in. Which one is correct ?
I was wrong to say that the symbol and labeling are incorrect. I understand now that the emitter is functioning as a collector in this device. You do have it correct I should have known
FYI, I have an MTX 3293B DMM that has two diode modes. One at 2.1V and the other at 26V/10mA.
Good video. I've never seen an IGBT in a TO-220 package before. I knew some existed, but have never seen one in the wild. The "small" IGBTs seem to mostly be in TO-247 packages. Though I haven't had the need to look for one in a few years.
I'm not sure how I found it or where it came from but it gave me the idea to do a video on the topic. The part seems to have been discontinued, which makes sense. Thanks for watching the videos.
@@TheOffsetVolt Very welcome. Just found your channel a few days ago and have been watching a couple videos a day. You've got a lot of knowledge on your channel. Thank you for sharing it.
@@TheOffsetVolt The diode you draw at min.11, I think should be pointed in the opposite direction. It doesn't match with the IGBT body diode at min.3
Woww 😍😍🔥very clear thankyou very much
You're welcome 😊
Great explanation !!!
Thank you!
A question sir i what type of diodes is use across the diodes less igbt I have a lot and everytime I try to use one it just kill it self in low side driving but works very will in high side but i did try using a 1 amp fast switching diodes across it but the diodes blow out and take the igbt out too so I need to know if I need the same current rating as the igbt it’s self for it to work and what type diodes is rated 390amp to use
Great tutorial...cheers.
Glad you enjoyed it
Very well explained , thanks ! Is it possible to put IGBts working at theirs linear part of its curve ?
Yes, absolutely
This video is so useful. Can I have IGBT circuit image or file of images used in the video?
So nice thanks sir
Interesting stuff, but I'm a bit confused; shouldn't the BJT symbol on the diagram around min31 be flipped vertically?
Hello Natanael, I think you are talking about picture with the schematics and the connections. This drawing is correct, VDD applied to the drain, source to ground.
@@TheOffsetVolt Hi, thanks for the reply.
It's the diagram that shows both the "physical composition" and the "schematic equivalent" (BJT+FET) together.
Just looking at the PNP transistor alone if Collector is VCC and Emitter is 0V, it'd be in reverse bias.
@@TheOffsetVolt I've also just compared with the schematic drawing a bit earlier on the video and it shows the MOSFET Source internally shorted to the BJT collector (instead of the emitter as on the diagram I'm referring on the previous comment)
I am researching for a variable frequency inverter circuit (H-bridge, microcontroller) for my DC welder. IGBTs should fit this bill, any considerations I should be aware of before i get into this can of worms?
Btw excellent video. New Sub here!
I am having trouble performing a dead short test on an H bridge that utilizes igbts. We are using an acpl 3333 J octo driver
Muito boa a sua explicação!
Muito obrigado!
14:54 when you said "micro siemens of resistance", did you mean micro ohms or resistance ? or micro siemens of admittance ?
Russel, you are right. it should have been milliohms or a few siemens. I pit a note in the description section pointing this out. Thanks for watching.
At 14:17 yo say that the current flows from emitter to gate but I think that the electrons flow from Emitter to Gate (and then to collector) and we have current from Collector to Emitter. Am I correct?
His symbol is incorrect at the first place in IGBT we show arrow on emitter side. So he eventually mixed those terms!
VERYGOOD JOB
Well thank you, glad it was helpful.
hey can u tell us how to test igbt modules and troubleshoot pcb boards ....pls
If I can dig up a module, I would be happy to.
27:29 T is temperature. What you looking for is t as time.
The drawing is incorrect. The collector of the bjt does not get an arrow
Forgive my ignorance. I understand now that the emitter within the device in this topography is functioning as The Collector. I live and I learn
looks like an explanation for experts , for those who don´t need it, i still DO NOT get it well
better SHOW how it works with battery and bulb, heat produced, cooling etc...
I don't unserstand the drawing at 7:30. If the bjt is a PNP. Why would the Emmiter get negative voltage and the collector positive voltage? A NPN would work that way.
Yeah, I think the BJT should be drawn as an NPN with the arrow going the other way.
I think in your first diagram The Collector and the emitter labels are transposed. In my experience the emitter always has the arrow on it
I am wrong. I understand now that the emitter is functioning as a collector in this topography. I learned something with this video thank you
I hear every engineer talking about mosfets or gbt don’t need current to fully conduct just voltage but I can relate that it’s all beg of garbage I use a halfbridge driver ir2014 240milliamp I try driving a full 500watt igbt at fully low the igbt got hot fast in boostrap mood the gate was voltage was 80volt because is high side the gate voltage will but high in floating and the current drain was 700 milliamperes on the gate and I will driving 5 igbt 500 watt each so 2500watt the driver couldn’t handle not everything 500 watt I had to add a emitter follower and then the gate was driver drawing 6amp at 4kw so engineer need to stop lying about igbt and mosfet don’t need current
😷🤣 DUDE... You haven’t mastered “Woke” terminology....
It’s supposed to read “IGBT - QIA” .
😆😂🤣👍
Thanks for your great collection of videos.
Your dab video was fantastic.