Emulation of fractional turns in push-pull topologies

Winding a transformer with fractional turns yields precise secondary voltages and good output regulation in a power converter. However, the real fractional turns introduce a significant amount of leakage inductance which is generally not desirable. This work describes a method of emulating the fractional turns in push-pull topologies. The technical aspects of emulation of fractional turns are examined and some design guidelines are given. The method is tested experimentally and the fundamental waveforms are presented