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How To Test IGBT Is OK?
Mar 29, 2018

Before the failure of rectifier, is there any explosion sound? If yes, the IGBT is likely to have been destroyed. Visually observe whether the IGBT has been burnt or burst.

If without above case, proceed as follows to measure the IGBT by multimeter diode position, if the measured value with big difference from the normal value, the IGBT is likely to be damaged.

IGBT module voltage measurement steps or check video on Youtube: https://youtu.be/bgvKD8am36s                      

Step 1: Remove the copper bus and components connecting IGBT’s electrode C1,E2 and C2E1.

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Step 2: Shift the multimeter to diode position, as shown below.

IGBT.png

Step 3: Multimeter red pen contact to C1, black pen to C2E1, and observe the multimeter reading, the normal value should display "0L";

IGBT.png

Step 4: Opposite the red pen and black pen, multimeter red pen contact C2E1, black pen to C1, and observe the multimeter reading,the normal value is about 0.4xx around.

igbt OL.png

Step 5: Multimeter red pen contact to C2E1, black pen to E2, and observe the multimeter reading, the normal value should display "0L";

IGBT.png

Step 6: Multimeter red pen contact to E2, black pen to C2E1, and observe the multimeter reading,the normal value is about 0.4xx around.

IGBT.png

IGBT testing.png

          website:www.gprectifier.com