A New Active Clamping Soft Switching Weinberg Converter

摘要

In this paper a new zero voltage switching flyback current-fed push-pull converter with an active circuit is proposed. The active clamp circuit not only absorbs the voltage surge across the switches at turn off instant, but also provides zero voltage switching condition for all switches. Main switches are controlled by PWM scheme and the auxiliary switches turn on are complementary with respect to main switches. Thus, the implementation of control circuit is simple. Both buck and boost modes of converter operates at soft switching conditions. Therefore, this converter can operate over a wide input voltage range. In this paper the operation of proposed converter is presented and the experimental results verify the converter analysis.