Three-phase single stage medium power supply using Cuk converter

A three-phase ac mains fed single stage medium power SMPS (Switched Mode Power Supply) is designed and modeled using dc-dc Cuk converter modules. The ac supply feeds to the modules of power supply, which are connected in series at the output to increase its rating and balancing the power on all three phases of supply. High frequency isolated Cuk converters are used as modular dc-dc converter in discontinuous conduction mode (DCM) of operation for power factor correction (PFC). Nearly unity power factor (PF) operation in the proposed power supply is obtained with harmonic reduction at three-phase input ac mains. Power quality indices of the power supply are also presented to demonstrate its improved performance at varying loading conditions.