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A New High Step-down Converter with Low Ripple Current and High Efficiency | ||
| AUT Journal of Electrical Engineering | ||
| دوره 57، شماره 1، 2025، صفحه 101-112 اصل مقاله (1.3 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/eej.2024.23068.5585 | ||
| نویسندگان | ||
| mohammed Ismail sehen1؛ Majid Delshad* 1؛ Nadheer Abdulreedha Shalash2؛ Bahador Fani1 | ||
| 1Department of Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University | ||
| 2Electrical Engineering Department, University of Technology, Baghdad, Iraq | ||
| چکیده | ||
| This paper introduces a new high step-down converter that achieves zero voltage switching in both primary and auxiliary switches without relying on coupled inductors, thus ensuring low ripple in input and output currents. The auxiliary circuit is optimized with the fewest possible components, facilitating zero voltage switching for the main and auxiliary switches and addressing the reverse recovery issue of freewheeling diodes through zero current switching conditions. Additionally, this design reduces voltage stress on the switches, allowing the use of MOSFETs with lower drain-source resistance. A significant benefit of this converter design is its avoidance of coupled inductors, circumventing issues related to leakage inductance, as well as potential increases in the converter's volume and weight. This approach enhances the converter's efficiency and practicality by eliminating common drawbacks associated with the use of coupled inductors. The design of the auxiliary circuit offers the flexibility to be extended to accommodate multiple phases, enhancing its adaptability for various applications. Furthermore, the control mechanism of this circuit is straightforward due to the auxiliary switch being operated in conjunction with the main switch. This coordinated control simplifies the overall circuit design, making the integration and management of the auxiliary circuit more efficient. The proposed converter's design and operational principles have been validated through PSpice simulations, and a 90W prototype has been constructed. Experimental results demonstrate an impressive 95 percent efficiency at full load | ||
| کلیدواژهها | ||
| High step-down converter؛ Active clamp؛ Zero voltage switching؛ Low current ripple | ||
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آمار تعداد مشاهده مقاله: 179 تعداد دریافت فایل اصل مقاله: 246 |
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