Abstract
An isolated converter with boost voltage conversion ratio is presented. The active clamp circuit is used to achieve zero voltage switching, release the energy stored in the transformer leakage inductance and limit the voltage stresses on power switches. Compared with the conventional active clamp forward converter, the adopted circuit has no large output filter inductor. Thus, it has features of simpler structure, lower cost and no effective duty loss. Experimental results for a converter with an input voltage of 24 V, an output voltage of 200 V and operating at switching frequency of 73 kHz are provided to verify the effectiveness of the proposed converter.
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