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This paper presents different experimental methods for measuring parasitic capacitances and inductances of direct copper bond (DBC) based power semiconductor modules. The found parasitics are compared with finite element simulations to evaluate their accuracy. A very good match of the simulated and measured stray capacitances is found. The parasitics, which are found via simulations and experiments,...
In this work, a gate driver with multiple stages based on switched resistors is presented. The influence of the different stages on the turn-on and on the turn-off behaviour is investigated using experimental measurements conducted on a double pulse test bench. It is shown that, compared to a single-stage reference driver, switching loss improvements are possible while maintaining the same voltage...
In the design or simulation phase of a power electronics converter, it is, among others, necessary to have accurate power semiconductor loss models. Such models can be extracted from datasheet values, but they do quite often not cover a wide variety of parameters such as dc-link voltage, temperature or even gate resistance. A double pulse test bench [1] was designed and built to measure switching...
Industrial and academic interest on multiphase electric machines have been steadily increasing due to the advantages they provide compared to their three phase counterparts. They offer higher efficiency and better fault tolerance. The power is distributed across a larger number of machine phases and inverter legs, which allows the use of semiconductor devices with lower ratings. These advantages are...
Increasing power densities of power electronics with reduced volume requires increased efforts in cooling as little surface and material are available for thermal conduction. A systematic comparison of the thermal resistance of a wide selection of thermal interface materials (TIMs) ranging from solid Al2O3 to elastomeric interface materials as well as thermal greases is investigated in this work....
A highly integrated inverter for open-end winding machines is designed and build. This paper presents the design of a 6-phase full-bridge inverter for driving an open-end winding machine for electric vehicles. The inverter consists of six full-bridge phase modules that are arranged in a hexagonal shape inside the motor housing. DirectFETs with double-side cooling are used as switching elements. Each...
This paper provides a comparison of four series-series compensated inductive power transfer systems for contact-less vehicle charging. A systematic comparison between hard-and soft-switching topologies, as well as different operating frequencies, is performed and the impacts on system efficiency and complexity are assessed in detail. In a holistic design process each system is individually optimized...
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