can anyone tell me how to check whether igbt and driver igbt can be used or not.. plzz...

 

Quote from Galco.com

"Digital multi-meter (DMM) test procedure:

• Equipment Requirement – DMM with diode check mode and battery voltage less than 20V. (Typical units using 9V battery are OK).
• Collector-Emitter Junction test:
  • With the module out of circuit remove the conductive foam and short the gate to emitter.
  • With DMM in diode check mode, the collector to emitter should give a normal diode reading with positive on the emitter and negative on the collector.
  • The DMM should read open or infinite with positive on the collector and negative on the emitter. Damaged IGBTs may test as shorted in both positive and negative directions, open in both directions, or resistive in both directions.
• Gate Oxide test: With the DMM in resistance mode the resistance from gate to collector and gate to emitter should read infinite on a good device. A damaged device may be shorted or have resistive leakage from gate to collector and/or emitter. "

 

thanks.. what about driver igbt.. i'm using ir2181.. how to check.. i'm scared if it's can't be used.. huhu

 

I have attached the datasheet for the IR2181.
You cannot "test" an IC like this with a meter.
On page #4 of the datasheet, there is shown the internal arrangement of the IC.
You may be able to "test" the Ho & LO outputs.
In general probe for shorts in the IC is about all you can do.
(Sounds like this applies to a SMPS circuit)

 

err.. what is SMPS circuit?

 

err.. what is SMPS circuit?

You will find google to be your friend!

http://en.wikipedia.org/wiki/Switched-mode_power_supply


This is how the majority of consumer power supplies operate, due to less power/heat needing to be dissipated than a linear regulator.

(Correct me if im wrong someone, please. I dont want to misinform the masses)

 

SMPS and driver IGBT.. i have to connect these things with my igbt.. am i right?

 

I really do not know what you just asked.
I think my question was "Are you working on a Switching Mode Power Supply"

 

sorry.. the answer is no