Quasi-Integrated Magnetic an Avenue For High Power density and Efficiency In Power Converters

Quasi-Integrated Magnetic an Avenue For High Power density and Efficiency In Power Converters

  • Date of Publication 23 Feb 1997
  • Meeting end date 27 Feb 1997
  • On page 395-402
  • Location Atlanta, Georgia, USA
  • Conference/Proceedings Applied Power Electronics Conference and Exposition, February 1997. APEC '97. Conference Proceedings 1997, Twelfth Annual

In order to utilize better the magnetic core of the transformer in DC-DC converters there are investigated some topologies that could fulfill this aim. The main idea is to use the transformer, usually an isolation component in a DC-DC converter, as a storage element too thus reducing the size of the choke from the filtering stage. In this way a quasi-integrated magnetic approach is set that can be seen as an intermediate step between conventional and fully integrated magnetic. Advantages and limitations are underlined. A topology using quasi-integrated magnetic was investigated with and without tap in the secondary side. As a result two methods that could eliminate the secondary winding tap are presented, one using a current doubler and the other one using two symmetrical transformers. Two experimental 100W converters providing 20A under 5V were built and evaluated using quasi-integrated magnetic approach under two different implementations.