Abstract
D.Ing.
This thesis treats aspects of electromagnetic integration in planar structures. These
structures are for use in power electronic converters. The electromagnetically integrated
structures fulfil the same electromagnetic function as conventional component structures,
but have manufacturing advantages. In order to reduce the cost of power electronic systems, a new cost effective manufacturing technology is needed. In this work a planar manufacturing approach is considered. This manufacturing approach lends itself well to the concept of integrated electromagnetics, where one physical structure fulfils more than one electromagnetic function. As not all the electromagnetic functions of a given converter may be integrated into a single structure, the approach is one of hybridisation. Some aspects remain conventional and some aspects are totally electromagnetically integrated. A proposal for a new schematic representation of converter topologies is put forward. These new schematics bridge the gap between conventional circuit diagrams and full three dimensional figures of the physical structures. These schematics form the basis of the design and analysis procedure and are necessary in order to convey information on the structures in a concise manner. A complex electromagnetic function, that of a resonant circuit with transformer coupling, is described and analysed in detail. The design equations governing the structure are derived and their implications on the volume of the structure is discussed. In the analysis only first order effects are considered.
Two case studies are carried out. The two converters are described in detail with
respect to their construction. Several aspects of general planar construction are identified
and discussed.