Dealing with IGBT Modules

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Why low inductive DC-link design? Due to stray inductances in the DC link, voltage overshoots occurduring switch off of the <strong>IGBT</strong>:vovershoot = Lstray× These voltage overshoots may destroy the <strong>IGBT</strong> module because theyare added to the DC-link voltage and may lead to V CE > V CEmaxdidtvCE= vovershoot+vDC−link With low inductive DC-Link design (small L stray ) thesevoltage overshoots can be reduced significantly.Motivation8
The comparison of stray inductances show Inside the module SEMIKRON reduced the inductances significantlyL stray = 20 nH Outside the module the reduction of stray inductances is necessary, tooL stray = 100 nHLow Inductance DC-link Design9
Page 1 and 2: Dealing with IGBT Modules1
Page 3 and 4: Dealing with IGBT Modules Motivatio
Page 5 and 6: Increased switching speed, decrease
Page 7: Dealing with IGBT Modules Motivatio
Page 11 and 12: The mechanical design has a signifi
Page 13 and 14: Simulation of current distributionf
Page 15 and 16: For paralleling standard modules a
Page 17 and 18: Paralleled half bridge IGBT modules
Page 19 and 20: Comparison of different designs Two
Page 23 and 24: Different snubber networks are in u
Page 25 and 26: But still: the snubber networks nee
Page 27 and 28: These capacitors did not work satis
Page 29 and 30: After introduction of optimised snu
Page 31 and 32: Over voltages at the gate V GE > +/
Page 33 and 34: Gate clamping with “Schottky Diod
Page 35 and 36: Auxiliary PCB directly at the IGBT
Page 37 and 38: Taking thermal management into rega
Page 41 and 42: Hard connected Gates All IGBTs have
Page 43 and 44: Separated by gate resistors All IGB
Page 45 and 46: The introduction of R Ex (≈ 10 %
Page 47 and 48: The introduction of R Ex leads also
Page 49 and 50: The introduction of clamping diodes
Page 51 and 52: PCB for paralleling IGBT close to t
Page 53 and 54: Auxiliary PCB directly at the IGBT
Page 55 and 56: Why symmetrical AC terminal connect
Page 57 and 58: AC link design Short connections wi
Page 59 and 60:
Optimisation problem In order to op
Page 61 and 62:
How to use single switch IGBT modul
Page 63 and 64:
Comparison For GB modules the diode
Page 65 and 66:
Advantages of paralleled half bridg
Page 67 and 68:
Dealing with IGBT Modules Motivatio
Page 69 and 70:
Dealing with IGBT Modules For paral
Page 71 and 72:
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Dealing with IGBT Modules

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