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I am implementing a VFD for Induction motor drive. I have used fs25r12w1t4 Infineon IGBT module ( 1200v 25A) with gate driver 6ed003l06-f2. It always burnt out when I passed 2A current. What may the reasons? Picture of the PCB design is attached here. Date resistance is 30 ohm. can you suggest me any other IGBT module that must be useful for VFD? and also gate driver. I connected load as an induction motor. for the test purpose, I started with low speed but after 15 minutes, all the system burnt out.

enter image description here Schamatic of gate driver with IGBT module enter image description here layout of PCB enter image description here

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  • \$\begingroup\$ Show us the schematic too. \$\endgroup\$ – brhans Feb 6 '18 at 18:33
  • \$\begingroup\$ In general, you need to be careful about the turn on/off of IGBTs, because that is where they burn most of their power. What is your switching frequency? Also, be sure that you are not leaving them both on and getting a shoot-through current. \$\endgroup\$ – pscheidler Feb 6 '18 at 19:04
  • \$\begingroup\$ my Switching frequency is 4K HZ . I am using SPWM techniques. I have added deadtime for the IGBT to avoid shoot through. 2.5us is the deadtime . \$\endgroup\$ – James Hock Feb 6 '18 at 19:11
  • \$\begingroup\$ It looks like you're missing the bootstrap doide going to VB1, is that true? \$\endgroup\$ – pscheidler Feb 6 '18 at 20:43
  • \$\begingroup\$ Dear @pscheidler, I am using Bootstrap diode. they are not showing in the figure .. they are connected below the gate driver. \$\endgroup\$ – James Hock Feb 6 '18 at 20:45
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This appears to be for just one phase. Do you understand how single phase induction motors function? most of them will have Starting, or Starting and Running capacitors and the capacitor charging current will damage the IGBTs.

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