Abstract
Abstract:
Minimization of leakage inductance of a
transformer is very often one of the main focus points during
the design because of the adverse effects it may have on some
power electronics circuit topologies. There are however
applications in which the leakage inductance may be used as a
circuit element, in which case it should be predictable and
easily realizable. Coaxial transformers are known for the ease
with which the leakage inductance may be predicted but
obtaining these values repetitively is still a problem because of
the manner of manufacture. This work investigates the
possibility of utilizing printed circuit board (PCB) technology
to manufacture coaxial transformers and to increase the
accuracy with which the desired leakage inductance may be
obtained. Finite element methods (FEM) as well as
experimental results are used to support the proposed ideas. A
planar transformer is also analyzed in the same way to
accentuate the design advantages offered by the proposed
quasi-coaxial transformer.