Active forward converter with integrated-magnetics and the minimum output ripple current

作者：Chen Qian Hong^*; Feng Yang; Zhou Lin Quan; Wang Jian; Ruan Xin Bo

来源：Proceedings of the CSEE, 2009, 29(3): 7-13.

• Active clamp circuit
• DC-DC module
• Forward converter
• Integrated-magnetics
• Ripple current

The large output ripple current impaired the performance of active clamp forward (ACF) converter. By the AC flux positive coupling of the inductor and transformer, the output ripple current can be reduced. The improved ACF converter with integrated magnetics was proposed in this paper. The operation principle of the proposed converter was analyzed in detail. By setting D=0.5 as the zero ripple current point, the minimized output ripple current and minimized voltage stress of primary switches were achieved simultaneously. The design consideration for the integrated magnetics was discussed along with the effect on the ripple currents. Two 100 W ACF prototype converters, with integrated magnetics and without, were built to verify the operation principle. Experimental results also proved that the proposed ACF converter has higher efficiency and lower output ripple current compared with conventional one.

• 出版日期2009
• 单位南京航空航天大学