| Presentation | 2021-01-25 Current resonance type soft switching converter using Cockcroft-Walton circuit Eita Morii, Kazuki Mine, Yuichi Noge, Masahito Shoyama, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A high step-up ratio isolated DC-DC converter using a step-up transformer and a Cockcroft-Walton (CW) circuit is used for the power supply circuit of the X-ray irradiation device such as CT scan. This circuit is large. In addition, since it is mounted on the rotating body of the inspection device, the merit obtained by miniaturizing the high frequency of the circuit is great. However, since increasing the switching frequency causes an increase in switching loss, soft switching is applied in this study. In this research, we have proposed a current resonance converter that realizes soft switching by using a step-up transformer and parasitic elements of the CW circuit in PFM control. In this paper, the capacitance of the CW circuit is first described. We will work on formulating the effects on resonance characteristics and output voltage ripple, select circuit parameters from the obtained calculation formulas, perform simulation verification and actual machine evaluation, and confirm the usefulness of the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cockcroft-Walton circuit / Soft switching / PFM control / Frequency characteristic |
| Paper # | EE2020-37 |
| Date of Issue | 2021-01-18 (EE) |
| Conference Information | |
| Committee | EE |
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| Conference Date | 2021/1/25(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | DC/DC converter, New circuit for power conversion and control, others |
| Chair | Tadashi Suetsugu(Fukuoka Univ.) |
| Vice Chair | Hiroo Sekiya(Chiba Univ.) / Keiichi Hirose(NTT Facilities) |
| Secretary | Hiroo Sekiya(Sojo Univ.) / Keiichi Hirose(Nagasaki Inst. of Applied Science) |
| Assistant | Yuu Yonezawa(FUJITSU Advanced Technologies) / Yudai Furukawa(Fukuoka Univ.) / Kazufumi Yuasa(NTT Facilities) |
| Paper Information | |
| Registration To | Technical Committee on Energy Engineering in Electronics and Communications |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Current resonance type soft switching converter using Cockcroft-Walton circuit |
| Sub Title (in English) | |
| Keyword(1) | Cockcroft-Walton circuit |
| Keyword(2) | Soft switching |
| Keyword(3) | PFM control |
| Keyword(4) | Frequency characteristic |
| 1st Author's Name | Eita Morii |
| 1st Author's Affiliation | Kyushu University(Kyushu Univ.) |
| 2nd Author's Name | Kazuki Mine |
| 2nd Author's Affiliation | Kyushu University(Kyushu Univ.) |
| 3rd Author's Name | Yuichi Noge |
| 3rd Author's Affiliation | Kyushu University(Kyushu Univ.) |
| 4th Author's Name | Masahito Shoyama |
| 4th Author's Affiliation | Kyushu University(Kyushu Univ.) |
| Date | 2021-01-25 |
| Paper # | EE2020-37 |
| Volume (vol) | vol.120 |
| Number (no) | EE-340 |
| Page | pp.pp.75-80(EE), |
| #Pages | 6 |
| Date of Issue | 2021-01-18 (EE) |