High Frequency, Soft Transitions Converter

High Frequency, Soft Transitions Converter

  • Date of Publication 07 Mar 1993
  • Meeting end date 11 Mar 1993
  • On page 880-887
  • Location San Diego, California, USA
  • Conference/Proceedings Applied Power Electronics Conference and Exposition, March 1993. APEC '93. Conference Proceedings 1993, Eighth Annual

A high efficiency, high power density power conversion technology is presented. This topology is compatible with high output voltage applications such as 24V and 48V, where Schottky rectifiers cannot be used. The converter combines zero voltage switching across the primary switches, continuous energy transfer from the primary to the secondary and soft commutations of the output rectifiers. The soft switching of the output rectifiers minimizes the reverse recovery losses associated with ultra fast rectifiers operating at high frequency. An experimental converter using this concept is evaluated. The converter operates from an input voltage of 200V to 430V at 300 KHz, providing 400W (50V@8A) with efficiency of 95% at full load.