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Implementation of low inductive strip line concept for symmetric switching in a new high power module

The low inductive strip line concept offers several benefits regarding the switching behavior of IGBT modules. But for the implementation in real packages a lot of boundary conditions have to be considered, such as standards, available material, manufacturing methods and the connectivity to the inverter system. This work shows a possible implementation for high power modules. Constrictions will be shown and possible solutions presented. Also for high power modules with high blocking voltages and high output currents a low inductive design with the strip line concept is possible. Legal regulations and standards create several constraints that do not allow the implementation of an ideal solution. But nevertheless, an IGBT study with a stray inductance below 7 nH at a nominal current of 700 A was realized. For future applications this will enable the use of fast switching devices. With reduced switching losses higher switching frequencies could be implemented.

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733.96 KB
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11/02/2014