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Conference
Keynote: Towards Virtual Prototyping and Comprehensive Multi-Objective Optimization in Power Electronics
Towards Virtual Prototyping and Comprehensive Multi-Objective Optimization in Power Electronics
Jürgen Biela, ETH Zürich, Switzerland
Towards Virtual Prototyping and Comprehensive
Multi-Objective Optimization in Power Electronics
The future development of power electronics is driven
by requirements for efficiency and power density
besides the continuous demand for cost reduction.
These demands can be met by using new topologies/
modulation schemes and new wide-band gap semiconductor
technology. However, besides that the performance
of a system can be improved significantly
by assigning optimal values to the design variables in
the course of the design process, i.e. by comprehensive
multi-objective optimisation.
In order to perform such an optimization first a mathematical
model, i.e. a Virtual Prototype of the main
converter circuit has to be established, including
thermal models and the measures for DM and CM EMI
filtering. Based on this model, an optimization for
multiple objectives, as e.g. efficiency or power density,
can be performed. The optimisation makes best use of
all degrees of freedom of a design and also allows
studying the sensitivity of the system performance on
base technologies like Figures of Merit of the power
semiconductors or magnetic core materials. Furthermore,
different concepts can be easily compared and
inherent performance limits identified.
In the paper the current status of design tools for
electric, magnetic, thermal and EMI, which in combination
could serve as basis for realising the Virtual
Prototype, are reviewed. In addition an analytical
approach for covering the various design domains is
discussed which result in a significantly lower
computational effort. This concept has been proven
successfully by the design and practical implementation
of converter systems of exceptional performance like
ultracompact and ultra-efficient single-phase PFC
rectifier and telecom DC-DC converters.
Furthermore, the linking of the different design domains
via e.g. the heat exchange, the parasitic electromagnetic
coupling and the geometry and/or shape of components
will be discussed. Based on such strongly interlinked
multi-domain models, finally a scenario for future
automated virtual prototyping and optimization is
drafted and key steps for achieving this goal are
identified. |
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