Cuk converter with inductors and capacitors on both power lines

摘要

Inductors L1, L2 are respectively inserted in series at the positive and negative sides of lines for guiding a direct current supplied from an alternating current power supply 1 through a rectification circuit 2, or a direct current supplied directly from a direct current power supply, a switching element S is connected in parallel to the inductors L1, L2, and capacitors C1, C2 are respectively inserted in series between the positive-side inductor L1 and a load, and between the negative-side inductor L2 and the load. Even no transformer is used, not only insulation for a direct current but also insulation for an alternating current can sufficiently be ensured (FIG. 1).