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| Presentation | 2008-02-22 09:00 Analysis of the Radiation Noise and Efficiency Characteristics in a Quasi-resonant Converter Yosuke Asako (Nagasaki Univ.), Hironobu Shiroyama (Fuji Electric), Yoichi Ishizuka, Hirofumi Matsuo (Nagasaki Univ.)  EE2007-64 CPM2007-149 Link to ES Tech. Rep. Archives: CPM2007-149 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A quasi-resonant converter using flyback topology can be realized soft-switching with relatively simple circuit. However, a switching device with high withstand voltage is necessary to achieve complete zero voltage switching (ZVS) when the input voltage is high and it causes decrease of power efficiency because a switching device with high withstand voltage has relatively high on-voltage. Therefore, we analyzed efficiency and noise of a quasi-resonant converter with a low breakdown voltage and low on-voltage switching device under the condition of non-zero voltage switching (non-ZVS). We measured the noise and the efficiency of a quasi-resonant converter in the case of ZVS and non-ZVS using different types of transformer with several value of resonant capacitor. As to radiation noise over 30MHz, we found the followings by measurement: 1) Noise level over 30MHz becomes smaller as resonant capacitor becomes larger. 2) There is little difference of noise level over 30MHz between ZVS and non-ZVS. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Flyback converter / Quasi-resonant converter / Zero voltage switching / / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 492, EE2007-64, pp. 1-6, Feb. 2008. | |
| Paper # | EE2007-64 | |
| Date of Issue | 2008-02-15 (EE, CPM) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | EE2007-64 CPM2007-149 Link to ES Tech. Rep. Archives: CPM2007-149 |
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| Conference Information | |
| Committee | EE CPM |
| Conference Date | 2008-02-22 - 2008-02-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EE |
| Conference Code | 2008-02-EE-CPM |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Analysis of the Radiation Noise and Efficiency Characteristics in a Quasi-resonant Converter |
| Sub Title (in English) | |
| Keyword(1) | Flyback converter |
| Keyword(2) | Quasi-resonant converter |
| Keyword(3) | Zero voltage switching |
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| 1st Author's Name | Yosuke Asako |
| 1st Author's Affiliation | Nagasaki University (Nagasaki Univ.) |
| 2nd Author's Name | Hironobu Shiroyama |
| 2nd Author's Affiliation | Fuji Electric Device Technology Co., Ltd. (Fuji Electric) |
| 3rd Author's Name | Yoichi Ishizuka |
| 3rd Author's Affiliation | Nagasaki University (Nagasaki Univ.) |
| 4th Author's Name | Hirofumi Matsuo |
| 4th Author's Affiliation | Nagasaki University (Nagasaki Univ.) |
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| Speaker | Author-1 |
| Date Time | 2008-02-22 09:00:00 |
| Presentation Time | 25 minutes |
| Registration for | EE |
| Paper # | EE2007-64, CPM2007-149 |
| Volume (vol) | vol.107 |
| Number (no) | no.492(EE), no.493(CPM) |
| Page | pp.1-6 |
| #Pages | 6 |
| Date of Issue | 2008-02-15 (EE, CPM) |
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