A Soft Switching Boost Converter with an Active Coupled Inductor Snubber Circuit

Subject Areas : Electronic Engineering

Hadi Faezi ¹ , Majid Zamani ² , Mohammad Ali Latifzadeh ³

1 - Department of Electrical and Computer Engineering, Malek-Ashtar University of Technology, Tehran, Iran
2 - Faculty of Applied Sciences, Malek-Ashtar University of Technology, Isfahan, Iran
3 - Department of Electrical and Computer Engineering, Malek-Ashtar University of Technology, Tehran, Iran

Received: 2023-02-09 Accepted : 2023-04-10 Published : 2023-08-23

Keywords: DC-DC converter, Active snubber cell, coupled inductor, Boost converter, Soft-Switching,

Abstract :

In this paper, a new soft switching boost converter is presented. A lossless active snubber circuit including an auxiliary switch, three diodes, a capacitor and a coupled-inductor provides soft switching conditions for the main switch and the output diode, so that the main switch and the output diode operate under ZCS and ZVS conditions, respectively. They turn on and off under the ZCS condition. The operation of the snubber circuit is associated with low current stress on the main switch and low current and voltage stress on the output diode. The proposed converter is able to maintain the smooth switching condition in a wide range of output load and input voltage variations. Working principles, steady state analysis and design procedure of this converter are discussed in detail. Also, to confirm the theoretical results, a laboratory sample is made and tested. It should be noted that, The laboratory results confirm the theoretical results comprehensively.

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