| Abstract |
Efficient two-stage hybrid output filters with diode-switched and harmonic-resonant stages for single- and three-phase diode rectifiers, to provide quasisinusoidal operation mode with close-to-unity power factor, are proposed, analyzed and verified. The harmonic reduction technique proposed is based on the ripple power factor conversion into the additional quantity of the dc output power. To verify the feasibility and usefulness of the proposed improved rectifier circuits, all new circuit configurations were tested using computer simulation. In addition, the correspondiong laboratory rectifiers were built and tested. In the experimental rectifiers power factor PF>= 0.99 were measured. The high values of the power factor hold in the wide range of the load variation. |
