A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS)
In this paper, a QR flyback converter using a self-driven active snubber (SDAS) was proposed to solve the problem of voltage surge in the switch of QR flyback converters. In the proposed converter, the SDAS consisting of a clamping capacitor and an active switch can be configured in parallel with th...
| المؤلفون الرئيسيون: | , , |
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| التنسيق: | مقال |
| اللغة: | English |
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MDPI AG
2023-01-01
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| سلاسل: | Energies |
| الموضوعات: | |
| الوصول للمادة أونلاين: | https://www.mdpi.com/1996-1073/16/3/1068 |
| _version_ | 1827760198165463040 |
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| author | Jeong-Sang Yoo Jong-Ok Baek Tae-Young Ahn |
| author_facet | Jeong-Sang Yoo Jong-Ok Baek Tae-Young Ahn |
| author_sort | Jeong-Sang Yoo |
| collection | DOAJ |
| description | In this paper, a QR flyback converter using a self-driven active snubber (SDAS) was proposed to solve the problem of voltage surge in the switch of QR flyback converters. In the proposed converter, the SDAS consisting of a clamping capacitor and an active switch can be configured in parallel with the main switch or transformer to reduce the voltage surge in the switch. To confirm the steady-state characteristics of the QR flyback converter to which the proposed SDAS is applied, equivalent circuits for each state were constructed, and the equations and characteristics for each state were determined. A 60 W class small AC–DC adapter was constructed to confirm the effectiveness of the proposed converter and the control circuit method, and the experimental results were analyzed. The size of the experimental AC–DC adapter was <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>74</mn><mo>×</mo><mn>29</mn><mo>×</mo><mn>23</mn><mrow><mo> </mo><mi>mm</mi></mrow></mrow></semantics></math></inline-formula>, and it had a high power density of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>20</mn><mrow><mo> </mo><mi mathvariant="normal">W</mi></mrow><mo>/</mo><msup><mrow><mi>in</mi></mrow><mn>3</mn></msup></mrow></semantics></math></inline-formula> or more. The experimental circuit was limited to the high power conversion efficiency of up to 91.56%, and the maximum voltage surge in the switch was approximately 450 V. One of the reasons for such high efficiency is the SDAS circuit, which sufficiently reduces the voltage surge of the QR flyback switch, compared with the RCD clamp circuit, and does not consume power in principle. |
| first_indexed | 2024-03-11T09:46:59Z |
| format | Article |
| id | doaj.art-7987b4b51eaa47d498ce1be4b83c99b1 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T09:46:59Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-7987b4b51eaa47d498ce1be4b83c99b12023-11-16T16:32:11ZengMDPI AGEnergies1996-10732023-01-01163106810.3390/en16031068A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS)Jeong-Sang Yoo0Jong-Ok Baek1Tae-Young Ahn2Department of Electronics Engineering, Cheongju University, Cheongju 28503, Republic of KoreaR&D Division, Zinnos Inc., Busan 49108, Republic of KoreaDepartment of Electrical & Control Engineering, Cheongju University, Cheongju 28503, Republic of KoreaIn this paper, a QR flyback converter using a self-driven active snubber (SDAS) was proposed to solve the problem of voltage surge in the switch of QR flyback converters. In the proposed converter, the SDAS consisting of a clamping capacitor and an active switch can be configured in parallel with the main switch or transformer to reduce the voltage surge in the switch. To confirm the steady-state characteristics of the QR flyback converter to which the proposed SDAS is applied, equivalent circuits for each state were constructed, and the equations and characteristics for each state were determined. A 60 W class small AC–DC adapter was constructed to confirm the effectiveness of the proposed converter and the control circuit method, and the experimental results were analyzed. The size of the experimental AC–DC adapter was <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>74</mn><mo>×</mo><mn>29</mn><mo>×</mo><mn>23</mn><mrow><mo> </mo><mi>mm</mi></mrow></mrow></semantics></math></inline-formula>, and it had a high power density of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>20</mn><mrow><mo> </mo><mi mathvariant="normal">W</mi></mrow><mo>/</mo><msup><mrow><mi>in</mi></mrow><mn>3</mn></msup></mrow></semantics></math></inline-formula> or more. The experimental circuit was limited to the high power conversion efficiency of up to 91.56%, and the maximum voltage surge in the switch was approximately 450 V. One of the reasons for such high efficiency is the SDAS circuit, which sufficiently reduces the voltage surge of the QR flyback switch, compared with the RCD clamp circuit, and does not consume power in principle.https://www.mdpi.com/1996-1073/16/3/1068quasi-resonant flyback convertersynchronous rectifieractive clamping switchRCD snubbervalley switchingactive snubber |
| spellingShingle | Jeong-Sang Yoo Jong-Ok Baek Tae-Young Ahn A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) Energies quasi-resonant flyback converter synchronous rectifier active clamping switch RCD snubber valley switching active snubber |
| title | A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) |
| title_full | A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) |
| title_fullStr | A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) |
| title_full_unstemmed | A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) |
| title_short | A High-Efficiency QR Flyback DC–DC Converter with Reduced Switch Voltage Stress Realized by Applying a Self-Driven Active Snubber (SDAS) |
| title_sort | high efficiency qr flyback dc dc converter with reduced switch voltage stress realized by applying a self driven active snubber sdas |
| topic | quasi-resonant flyback converter synchronous rectifier active clamping switch RCD snubber valley switching active snubber |
| url | https://www.mdpi.com/1996-1073/16/3/1068 |
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