Abstract: Analysis and design of interleaving active clamp forward converters are deeply investigated. The ZVS condition for power switch and design of key circuit parameters are given. Theoretical analysis is verified by the simulation and the test results. The investigation result shows that the interleaving active clamp forward converter has excellent electrical performance, and it is especially attractive in high power distributed power systems.

Key words: interleaving technique, act ive clamp, fo rw ard converter