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Paper Abstract and Keywords
Presentation 2021-01-25 16:10
Current resonance type soft switching converter using Cockcroft-Walton circuit
Eita Morii, Kazuki Mine, Yuichi Noge, Masahito Shoyama (Kyushu Univ.) EE2020-37
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) Cockcroft-Walton circuit / Soft switching / PFM control / Frequency characteristic / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 340, EE2020-37, pp. 75-80, Jan. 2021.
Paper # EE2020-37 
Date of Issue 2021-01-18 (EE) 
ISSN 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 EE2020-37

Conference Information
Committee EE  
Conference Date 2021-01-25 - 2021-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Online (Zoom) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) DC/DC converter, New circuit for power conversion and control, others 
Paper Information
Registration To EE 
Conference Code 2021-01-EE 
Language Japanese 
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  
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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.)
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Speaker Author-1 
Date Time 2021-01-25 16:10:00 
Presentation Time 25 minutes 
Registration for EE 
Paper # EE2020-37 
Volume (vol) vol.120 
Number (no) no.340 
Page pp.75-80 
#Pages 6 
Date of Issue 2021-01-18 (EE) 

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