An insulated-gate bipolar transistor?

[capwizard]

IGBT?

Testing an IGBT
https://www.youtube.com/watch?v=_Ygmbfw-9XE

IGBT gate drivers
https://www.youtube.com/watch?v=BEp6NUQLBuE

Lecture 32 IGBT
https://www.youtube.com/watch?v=P9CDR3VVbHo

Insulated-Gate Bipolar Transistor or IGBT
https://www.youtube.com/watch?v=3HDzqDZaprE

Reinforced Isolated IGBT Gate-Drive Flyback Power
Supply With Eight Outputs
https://cdn.badcaps-static.com/pdfs/...41705d57a2.pdf

Why Opt for IGBTs in SMPS Applications?
http://powerelectronics.com/content/...s-applications

PDP Power Devices
https://cdn.badcaps-static.com/pdfs/...2a8dd1430c.pdf

[capwizard]

Re: An insulated-gate bipolar transistor?

After I sub with IGBTs if it works I will have a feeling of accomplished Mission Impossible, and I'm addicted to it. So PL don't ask why I do that?

Case one: LG 60PV450 Z-board has 4 FGPF4633 shorted I sub with 30j124, when I turn the power on, I scared put both of my hands on my ears, because I don't like the pop noise.... HA HA your a chicken! ...Yes, TV works, For how long , customer will test for me with my one year warranty!

PS: If you never sub with IGBTs you never know of which can do it..........Errors built up experiences........By CapWizard...............

just Now, one lady opened the door gave me an air kiss with her lips and closed the door, leaved,... Mental Problem......horny......Why....because she is not A good looking girl who does that to me once in awhile........... I don't even know her name and I'm old and ugly..........

[capwizard]

Re: An insulated-gate bipolar transistor?

After i changed TV works, an IGBT I was used on Panasonic TV. Let's look at the specifications. they are perry closed, I'm lucky with this one..........

PS: This one is caused by underneath 3 big coils's bad connections no needs to upgrade them.

30J124 GT30J124 IGBT 600V 300A TO-220SIS

FGPF4633 330 V 300A PDP Trench IGBT 300A
https://cdn.badcaps-static.com/pdfs/...a9fdcb5c6d.pdf

[budm]

Re: An insulated-gate bipolar transistor?

So what is the Vge(th) and Vce(sat) of the sub? It is not just the breakdown Voltage and current handling that you need to look at.

[capwizard]

Re: An insulated-gate bipolar transistor?

I thought about the Vge(th)= g-e treshold voltage 3.3v and Vce(sat)= c-e saturation voltage=1.35v , but Toshiba's IGBT GT30J124 has no information for many years. it's like blind dates for this two IGBTs. You can tell for me this is not my first attempt to do that. the old CRT TVs I sub all the HOTs with damper diode to 2SD1556.

[Longbow]

Re: An insulated-gate bipolar transistor?

A substitute of any kind of part can often work for short times. Usually there is a reason the designer chose that particular part. Also, once the circuit is built, adjustments are made at the design stage to eliminate parasitics, overheating, ringing in the waveforms and lots of other stuff. A new part will definitely change the values of parasitic capacitance and inductance, etc. But everyone gets lucky sometimes.

A good way to start on the topic is really to ask "why use an IGBT" in this circuit? There are perfectly good MOSFETS and low Vce switching transistors out there that can do the same thing.

[budm]

Re: An insulated-gate bipolar transistor?

Only time will tell if the sub will last or not.

[capwizard]

Re: An insulated-gate bipolar transistor?

Longbow Thank you for your advice.
"a reason the designer chose that particular part."
All I try to do is surpass the LG south Korean's college graduated young TV circuits designer...............

[budm]

Re: An insulated-gate bipolar transistor?

Longbow Thank you for your advice.
"a reason the designer chose that particular part."
All I try to do is surpass the LG south Korean's college graduated young TV circuits designer...............

But you did not find many other critical specs of the original part to know if the sub is OK for long term or not, you only went by the breakdown Voltage and current handling spec.

[capwizard]

Re: An insulated-gate bipolar transistor?

I am telling Trump! This is not a fair game to play, because all we get is this (attached file).
and TV has no parts , no screens , no diagrams for us. How can we blindfold and play game with them?............

PS: Any car or equipment sale to US, needs to have 10 years parts in stock. Can someone make sure this law?

[budm]

Re: An insulated-gate bipolar transistor?

I am telling Trump! This is not a fair game to play, because all we get is this (attached file).
and TV has no parts , no screens , no diagrams for us. How can we blindfold and play game with them?............

Do you have circuit diagram for your car computer module, your HVAC board you just replaced, and lots more of other products you have in your house?

[capwizard]

Re: An insulated-gate bipolar transistor?

No! but I am telling Trump! This world is not fair!...................

[budm]

Re: An insulated-gate bipolar transistor?

If you design the circuit for your products, will you give away your design out to any one that want it, even your competition??

[capwizard]

Re: An insulated-gate bipolar transistor?

if you apply for A patent you need to prove everything to patent office. Every time I design a circuit or a device I always gave to Badcaps.

[budm]

Re: An insulated-gate bipolar transistor?

Not all the design needs to be applied for patent, patent is not going to stop people copying your products.
Not applying for patent does not mean the products do not work.

[Longbow]

Re: An insulated-gate bipolar transistor?

I assume that your IGBT device was used as the horizontal output transistor? In that case you obviously need a part that has a high Collector to Emitter breakdown voltage and a low Vsat. Sometimes IGBT's are chosen because they have a lower saturated "resistance" (voltage actually) which can be around .2 volts sometimes - lower than the E-B bias in regualr transistors. Usually it is wise to replace the HV diode in the secondary. We always had a "ringer" tool to test the output transformer and the horizontal deflection yokes. Either or both of these parts can fail and be the cause for the switching transistor to smoke. If they are bad however, you will usually have a funny looking picture. Suprisingly, companies like MCM carry a lot of aftermarket parts for old sets - not ideal but better than nothing.

I have read a number of journal articles that compare MOSFET's with IGBT's for power switching, such as with 3-phase motor control. It seems that there is a difference of opinion on which is better, but some choices are dictated by parts availability and specific voltage/current levels involved. Not so easy. At one time there were no IGBT's and all the TV's used special HV transistors for the horizontal outputs. And, they didn't usually fail unless something else downstream shorted out. Just an opinion.

And you are correct about why some designers use certain parts. I know for a fact that if a manufacturer has 100,000 unused transistors in his inventory, he will make a design that uses up the overstock. I've seen it in lots of cases. Clever.

[capwizard]

Re: An insulated-gate bipolar transistor?

"We always had a "ringer" tool to test the output transformer and the horizontal deflection yokes." We use ESR meter to ring test HV transformers and deflection yokes and it works OK. The best is use frequency counter and scope to check them.

[budm]

Re: An insulated-gate bipolar transistor?

You mean square wave generator (or function generator since you need to drive the winding) and scope .

[capwizard]

Re: An insulated-gate bipolar transistor?

Why south Korean's LG and Samsung company during 10 years period of time can surpass Japan TV company like Sony, Sharp...Become No 1 TV makers in the world! Because the USA is behind them and give A technical support, , Why? Since Korean war US is the majority aid of South Korea and America finance the war needs money, so if South Korea can afford its own defense the quickest way to make money is from consumer electronics? I think UK is behind them also because Britain is an important anti-communist country, plus an ally of the United States........Russian has 100 more advantages, benefits than South Korea became A TV leader in the world..............Am i right?.......................

Bibliography:
South Korea Can Afford Its Own Defense
http://www.theamericanconservative.c...s-own-defense/
the South Koreans currently pay about 40 percent of the costs of keeping U.S. forces in their country

I am telling Trump!!!
http://www.globalresearch.ca/make-am...lated_articles

Why America Needs War
http://www.globalresearch.ca/why-ame...ds-war/5328631

During the Second World War America had witnessed a modest redistribution of the collective wealth of the nation to the advantage of the less privileged members of society.
America, or rather, corporate America, was orphaned of its useful Soviet enemy, and urgently needed to conjure up new enemies and new threats in order to justify a high level of military spending.
And so Mars could remain the patron saint of the American economy or, more accurately, the godfather of the corporate Mafia that manipulates this war-driven economy and reaps its huge profits without bearing its costs. The despised project of a peace dividend could be unceremoniously buried, and military expenditures could remain the dynamo of the economy and the wellspring of sufficiently high profits.

[capwizard]

Re: An insulated-gate bipolar transistor?

Yes.

Pic1:
Measuring the Q-factor of a resonator with the ring-down method
http://www.giangrandi.ch/electronics...ingdownq.shtml

pic2:
http://seniorphysics.com/physics/eei.html