I'm trying to evaluate switching losses for an igbt with a 10uH load...
The datasheet give me the Eon / Eoff with an inductive load of 100uH..
I need to consider the different load? how?
Thanks!
- posted
16 years ago
IGBT switching energy
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- posted
16 years ago
What datasheet?
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- posted
16 years ago
Any power IGBT ds give you Eon and Eoff as function of the current. Like this, page 4 :
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"W>> I'm trying to evaluate switching losses for an igbt with a 10uH load...
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- posted
16 years ago
The test circuit inductance is chosen to allow testing at a reasonably low duty cycle without a lot of ripple in the current of the DUT.
It has no effect on switching losses if turn-on and turn-off currents are duplicated, at the voltage specified, in each instance.
In real life, lower inductance suggests higher peak current at turn-off, for the same average collector current - aggravating losses occuring in the current tail portion of the waveform. Adjust your loss calculations accordingly.
RL