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User17676
Level 1
10 questions asked 5 questions asked First question asked
Level 1
In the used DC link design of the resulting losses (Eon and Eoff) differ from the datasheet values given by Infineon. Why are the losses different?
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IGBT_Wizzard
Moderator
Moderator 10 solutions authored 10 replies posted 5 solutions authored
Moderator
Hi MonacoFranz,

Different losses between application and data sheet can be resulting from
- differences in the DC link leakage inductance. The different leakage inductance may result in lower overvoltage shoot at turn-off and this will influence the Eoff and/or in a lower voltage drop at turn-on and this will influence the Eon.
- different Rgon or Rgoff values resulting in different switching speeds at turn-on and/or turn-off. The differences in di/dt will result in different overvoltages at turn-off. Or if the di/dt is higher at turn-on in a higher voltage drop, resulting in a lower Eon.
Regards
TS

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IGBT_Wizzard
Moderator
Moderator 10 solutions authored 10 replies posted 5 solutions authored
Moderator
Hi MonacoFranz,

Different losses between application and data sheet can be resulting from
- differences in the DC link leakage inductance. The different leakage inductance may result in lower overvoltage shoot at turn-off and this will influence the Eoff and/or in a lower voltage drop at turn-on and this will influence the Eon.
- different Rgon or Rgoff values resulting in different switching speeds at turn-on and/or turn-off. The differences in di/dt will result in different overvoltages at turn-off. Or if the di/dt is higher at turn-on in a higher voltage drop, resulting in a lower Eon.
Regards
TS
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