What does it mean by " AK " (terminal or pin no on IGBT power module) ?

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dineshdeshmuk

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What does it mean by " AK " (terminal or pin no on IGBT power module) ?

I know that A is for Anode & K for Cathode ......... but what about AK ...... there is not any other pin or terminal having only " A " or only " K " ........

thanks
 

Markings of this kind are usually assuming knowledge of a device principle circuit. They are not primarly intended to support guessing about unknown components.

Nevertheless "AK" is almost self explanatory in my opinion. It can e.g. refer to the center tap of a half bridge, in other words a terminal, that's connected to both, anode and cathode.
 
This article uses the "A" to denote accessory connections to the emitter and collector:

http://www05.abb.com/global/scot/scot256.nsf/veritydisplay/01b51693ac3e10b4c1256c5600398aa8/$file/hk97ts_web.pdf

I tried, but could not find any current device from ABB that uses AK though, which would mean the accessory cathode based on that presumption. A top view picture of the device might help.

John

Edit: You may need to copy the link and paste it into your browser to see it.
 
Your example shows, that two letters can't tell much if you don't know what kind of device is connected to the terminals.

My favourite explanation is still the below scheme

 
FvM said:
Your example shows, that two letters can't tell much if you don't know what kind of device is connected to the terminals.

My favourite explanation is still the below scheme

Click to expand...

part no. is cm40ye13-12h by Mitsubishi ....... its assembled inside G7 Yaskawa Inverter .....
there is not any circuit diagram on the case of this IGBT Power Module .......

SO, if i want to test that IGBT what should i consider about that terminal " AK " ?

thanks for your explanations though
 
CM40YE13-12H
(Three Level Inverter) IGBT
40 Amperes/600 Volts



You should test like this diode combination
But note the effect of connected surrounding components

 
kak111 said:
CM40YE13-12H
(Three Level Inverter) IGBT
40 Amperes/600 Volts

View attachment 62675

You should test like this diode combination
But note the effect of connected surrounding components

View attachment 62676
Click to expand...

Should i test these diodes individually ?

https://obrazki.elektroda.pl/9_1318704616.jpg

To test this diode :

Connect Positive (Red) Probe to " AK " & connect Negative (Black) Probe to " E1U "
And, Connect Positive (Red) Probe to " E1U " & connect Negative (Black) Probe to " AK "

Is this Procedure right ?

And test Braking Circuit Diode as :

Connect Positive (Red) Probe to " P " OR '' AK " & connect Negative (Black) Probe to " B "
And, Connect Positive (Red) Probe to " B " & connect Negative (Black) Probe to " P " OR '' AK "

Is this Procedure right ?

Are P & Ak both short to each other ?

What is " RTC " ?

thanks bundle of
 
Should i test these diodes individually ?
Click to expand...
Yes.

To test this diode :
Connect Positive (Red) Probe to " AK " & connect Negative (Black) Probe to " E1U "
And, Connect Positive (Red) Probe to " E1U " & connect Negative (Black) Probe to " AK "
Is this Procedure right ?
Click to expand...
Yes.

And test Braking Circuit Diode as :
Connect Positive (Red) Probe to " P " OR '' AK " & connect Negative (Black) Probe to " B "
And, Connect Positive (Red) Probe to " B " & connect Negative (Black) Probe to " P " OR '' AK "
Is this Procedure right ?
Click to expand...
No.
Test must do with P ( P and AK are are not connected )

Are P & Ak both short to each other ?
Click to expand...
No.

What is " RTC " ?
Click to expand...
Read part B. RTC Detection
**broken link removed**


Ref: another implementation of protective circuit NLU , look here...........


KAK
 
Last edited:
kak111 said:
Yes.


Yes.


No.
Test must do with P ( P and AK are are not connected )


No.


Read part B. RTC Detection
**broken link removed**


Ref: another implementation of protective circuit NLU , look here...........


KAK
Click to expand...

Difference between NLU & RTC ? (Any difference of application ?)

thanks a lot
 
Difference between NLU & RTC ? (Any difference of application ?)
Click to expand...

Some IGBT modules have a built in RTC or NLU circuit connected between gate and emitter.
These circuits limits short circuit over current .
When excessive current flows in the device the RTC or NLU circuit activates and reduces
the gate voltage in order to limit the short circuit current.

As above shown M57160L-01 hybrid gate driver circuit can implement RTC detection.

 
It's important to understand. that a NLU or RTC circuit in the IGBT module without a respective detection and shutdown feature in the driver just would delay wreck of the IGBT by a few 10 us. In my view, there's no functional or circuit difference between the shown NLU respectively RTC.
 


thanks a lot

so what do you wanted to explain would you elaborate more by saying " NLU or RTC circuit in the IGBT module without a respective detection and shutdown feature in the driver just would delay wreck of the IGBT by a few 10 us " ??
 
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    M

    munzir

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Because current limit forces the IGBT into desaturated operation.
 
Reactions: munzir

    M

    munzir

    Points: 2
    Helpful Answer Positive Rating
FvM said:
Because current limit forces the IGBT into desaturated operation.
Click to expand...

so it means you're saying that its not a good option (circuitry i.e. either RTC or NLU) to use these in a IGBT Power Module ???
 

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