18-01-2013, 09:08 AM
Datasheet of IGBT Modules Explanation of Technical Information
Datasheet of IGBT.pptx (Size: 686.6 KB / Downloads: 26)
Objective
How to select
The IGBT for the maximum operating voltage, current, frequency of the circuit(inverter, motor drive, etc…)
The pulse voltage magnitude and power of the gate driving circuit
The overcurrent protection device (fuse) for IGBT
The heat sink for a given operating condition using the datasheet parameters.
Switching times
The switching times in the datasheet provide useful information to determine an appropriate dead time between turn-on and turn-off.
Turn-on delay time tdon :
Time it takes from getting the gate-emitter voltage to 10% of the rated value to the moment the collector current reaches 10% of its nominal size.
Rise time tr:
Time which the collector current takes to rise from 10% to 90% of his nominal value.
Turn-off delay time tdoff:
Time necessary from getting the gate-emitter voltage to 90% of the rated value to the moment the collector current reaches 90% of its nominal size.
Fall time tf:
Time which the collector current takes to fall from 90% to 10% of its nominal value.
THERMAL RESISTANCE
Thermal Resistance is defined as the difference in temperature between two closed isothermal surfaces divided by the total heat flow between them.
Rth(j-c)=(Tj-Tc)/ Ptot(max)
Electrical conduction occurs in response to a voltage difference; heat conduction occurs in response to a temperature difference.