  Power converters require passive low-pass filters which are capable of
reducing voltage ripples effectively. In contrast to signal filters, the
components of power filters must carry large currents or withstand large
voltages, respectively. In this paper, three different suitable filter
structures for d.c./d.c. power converters with inductive load are introduced.
The formulas needed to calculate the filter components are derived step by step
and practical examples are given. The behaviour of the three discussed filters
is compared by means of the examples. Practical aspects for the realization of
power filters are also discussed.
