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PDP의 유지 전원을 위한 고효율 LLC 직렬 공진컨버터
이현관(Hyun-Kwan Lee),이기식(Gi-Sik Lee),강성인,공영수(Young-Su Kong),김은수(Eun-Soo Kim),임대호(Dae-Ho Lim),허동영(Dong-Young Huh),장병철(Byoung-Chul Jang) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
The LLC series resonant converter with a LLT(Inductor-Inductor-Transformer)transformer for PDP V sustaining power supply is presented. LLT transformer used to combine the inductor and transformer into one unit has the increased leakage inductance in the primary and secondary due to the winding method and the use of the gaped core. The increased leakage inductance in the primary and secondary of LLT transformer can be impacted on the DC voltage gain characteristics of LLC series resonant converter. In this paper, DC gain characteristics and the experimental results of the LLC series resonant converter with a LLT transformer are verified on the simulation based on the theoretical analysis and the 400W experimental prototype.
변압기 2차측 LLC 직렬공진컨버터 적용 승압형 DC/DC 컨버터
이현관(Hyun-Kwan Lee),이기식(Gi-Sik Lee),정봉근(Chung-Bong Geon),공영수(Young-Su Kong),김은수(Eun-Soo Kim),차인수(In-Su Cha),윤정필(Jeong-Phil Yoon) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
Recently, the high frequency isolated boost DC/DC converter has been widely used for the PCS (Power Conditioning System) system because of its small size and low cost. However, the high frequency isolated boost DC/DC converters applied the conventional voltage-fed converter and current-fed converter have the problems such as the high conduction losses and the surge voltage due to the high circulating current and the leakage inductance, respectively. To overcome this problems, in this paper the secondary LLC resonant converter is proposed, and the experimental results of the secondary LLC series resonant converter for boost DC/DC converter are verified on the simulation based on the theoretical analysis and the l㎾ experimental prototype.
박준형(Jun-Hyoung Park),이승민(Seung-Min Lee),김은수(Eun-Soo Kim),황인갑(In-Gab Hwang),공영수(Young Su Kong) 전력전자학회 2013 전력전자학회 논문지 Vol.18 No.5
In this paper, For achieving the high gain and resonant characteristics in both of the power flow directions, a bidirectional resonant dc-dc converter with auxiliary switches is proposed. Auxiliary switches are connected in the primary and secondary side of the bidirectional resonant dc-dc converter, respectively. A 800W prototype bidirectional resonant dc-dc converter for interfacing the 400V DC buses in the energy storage system is built and tested to verify the validity and applicability of this proposed converter.
이현관(Hyun-Kwan Lee),이기식(Gi-Sik Lee),정봉근(Bong-Geun Chung),강성인(Sung-In Kang),공영수(Young-su Kong),김은수(Eun-Soo Kim),김윤호(Yoon-Ho Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
Comparing with the conventional transformer without the air gap, a contact-less transformer with the large air-gap (4.8㎝) between the long primary winding and the secondary winding has the increased leakage inductance and the reduced magnetizing inductance. By the increased leakage inductance and the reduced magnetizing inductance on the primary of the contact-less transformer, a good deal of the primary current circulates through magnetizing inductance, which results in a massive loss in contact-less power supply (CPS). In this paper, the efficiency characteristics of the contact-less power supply using a series resonant converter is analyzed and simulated. The results are verified on the simulation based on the theoretical analysis and the 1.8㎾ experimental prototype.