Study of interleave DC/DC converter in energy feedback electronic power load
LV Yadong ，MA Hao
(Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)
Abstract: Aiming at the input with low voltage and large current, high gain, and high efficiency special requirements of the DC/DC module in the energyfeedback electronic load,  the inventional circuit topologies and techniques were analyzed. A novel input parallel and output series topology which increases the stepup gain with the coupled inductance was introduced. Meanwhile, the softswitching was implemented with the active clamp circuits.  An interleaved parallel converter was designed based on this new topology to meet the large power requirement and decrease the current ripple effectively. Then  the deadtime, winding ratio of the transformer and magnetizing inductance were analyzed,  the fixed input current control of the converter with DSP was realized. The experimental results demonstrate that this scheme is feasible, the converter operates stably with high efficiency.
Key words: low voltage and large current; high gain; softswitching; electronic power load