This paper presents the voltage-fed three-phase push-pull dc-dc converter, some of the main characteristics are low size and light weight of the input and output filters, reduced number of components, non-pulsation current in the output, non-pulsation current in the input for 33.3% of duty cycle and low voltage stresses on the semiconductors. Some applications can be battery chargers, automotive, interconnection of photovoltaic, wind, and fuel cells systems. Analysis and a design approach, for the proposed converter under large input voltage and load variation, are presented. Finally, theoretical results are experimentally verified. ©2009 IEEE.