Performance analysis of a single stage single phase high step-up soft switching boost converter

In this paper, a voltage multiplier cell with built-in transformer is inserted into the conventional single switch boost converter, which can extend the voltage gain by regulating not only the duty cycle, but also the turns ratio of the built-in transformer. Furthermore, the switch voltage stress can be reduced greatly by increasing the turns ratio of the built-in transformer. Therefore, the switch conduction losses can be minimized by employing low voltage rated power devices. Furthermore, Zero current switching (ZCS) turn-on for the switch and reverse-recovery problem alleviation for the diodes are achieved to reduce the switching losses. As a result, the proposed converter is suitable for high step-up and high output voltage applications. Finally, the experimental results from a 500W 36V-380V prototype are provided to validate the effectiveness of the proposed converter.