A New Soft‐Switched Trans‐Inverse Step‐Up DC/DC Converter With Zero Input Current Ripple

ABSTRACT In this article, a new single‐switch high step‐up DC/DC converter with soft‐switching performance is presented for sustainable energy applications. In this circuit, zero input current ripple is obtained at a small value of the input inductance. Therefore, the ohmic loss of the input inductor will be significantly alleviated. Also, a three‐winding coupled‐inductor (TWCI) and a voltage multiplier are merged in this topology to achieve high voltage gain with an appropriate duty cycle. Semi‐trans‐inverse specification of this circuit makes it possible to achieve high output voltages under a lower magnetic turns ratio, which leads to power loss reduction. Moreover, a regenerative clamp recycles the leakage energy to the output and also mitigates the maximum voltage stress across the power switch. In addition, to help further efficiency improvement, a resonant tank with a quasiresonant performance between the middle capacitors and the leakage inductance of the TWCI is adopted to decrease the power dissipations of the switching components. The operating principle and steady‐state analysis of the introduced converter are described in detail. To verify the superiority of the presented circuit, a comparison with relevant converters is provided. Eventually, the theoretical analysis was verified by a 300‐W experimental prototype.