A New Interleaved Step-Up Converter with Leakage Inductances Energy Recovery and High Efficiency

Subject Areas : Power electronics converters

Hosein Talgini ¹ , Majid Delshad ² , Ramtin Sadeghi ³

1 - Faculty of Engineering- Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
2 - Faculty of Engineering- Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
3 - Faculty of Engineering- Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran

Received: 2022-06-13 Accepted : 2022-10-14 Published : 2024-09-22

Keywords: High Step-up Converter, zero voltage switching, zero current switching, Interleaved structure, Reverse recover problem,

Abstract :

In this paper, a new interleaved step-up converter with leakage inductances energy recovery is presented. The auxiliary circuit in the proposed converter not only provides zero voltage switching conditions for all switches, but also the leakage inductance energy of the coupled inductors is recovered and also helps to increase the voltage gain and reduce the voltage stress of the switches. Therefore, the converter does not need passive clamp circuits to control voltage spikes on the switches. Also, all switches do not have capacitive turn-on losses in the switches. On the other hand, the output diodes operate under zero current switching and do not have the reverse recovery problem. The converter is also controlled by pulse width modulation, and since the auxiliary switches are turned on in complimentary with the main switches, they do not have a complex control circuit. The proposed converter has been completely analyzed and to confirm its correctness, a 100W sample of the converter has been made and its practical results have been presented.