• Title/Summary/Keyword: Planar Transformer

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Forward Converter Using 300W Planar Transformer (300W 평면 변압기적용 포워드 컨버터)

  • Choi, S.H;Park J.Y;Kim E.S
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.6
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    • pp.560-567
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    • 2004
  • In this paper, the design and implementation of a high power(300W) forward converter using a planar transformer is presented. The overall size and volume of the converter is decreased by replacing a planar transformer in stead of using a conventional winding transformer. Due to the decreased size and volume, power density of the applied forward converter is increased. Also, in this paper, the 300W ZVS forward converter with active clamp snubber circuit is compared to the 300W hard switching forward converter planar transformer, the decreased size and volume, the 300W ZVS forward converter with active clamp snubber circuit, 30W hard switching forward converter.

Design and Analysis of the 300 W Planar Transformer (300 W급 평면 변압기의 설계 및 분석)

  • ;;;;;Ustinov Evgeniy
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.5
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    • pp.502-507
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    • 2004
  • The forward planar transformer, which had power capacity of 300 W, input voltage of 220 V, output voltage of 15 V, and switching frequency of 300 KHz, was designed and manufactured by using the planar core with large effective area and the flat copper leadframes for miniaturization and high efficiency of the switching mode power supply (SMPS). As well as, a forward converter equipped with the above mentioned planar transformer was manufactured and electromagnetic characteristics were investigated. The numerical value of turns for 1st and 2nd winding were 15 and 2 respectively The self inductance of 1st winding was 1.592 mH, very low leakage inductance of 2.7 $\mu$H, and the coupling factor of 0.928 were obtained at switching frequency of 300 KHz. The high efficiency of 88.62 % for the SMPS equipped with planar transformer was obtained at power capacity of 300 W.

LLC Resonant Converter Using A Novel Planar Transformer (새로운 형상의 평면변압기를 이용한 LLC 공진컨버터)

  • Lee, Seung-Min;Noh, Young-Jae;Kang, Cheol-Ha;Jang, Sang-Ho;Kim, Eun-Soo;Chung, Bong-Gun
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.6
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    • pp.627-637
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    • 2011
  • To cope with the high power density and low cost in switching power supply, this paper presents a novel planar transformer, which can regulate the leakage inductance of planar transformer used for LLC resonant converter. Modeling and analysis of a novel planar transformer are discussed in detail and a prototype 200W LLC resonant converter is tested to verify.

Manufacture and Characteristics of the Planar Transformer using low power loss magnetic materials (저손실 자심재료를 이용한 평면변압기 제조 및 동작특성)

  • Lee, Hae-Yon;Heo, Jeong-Seob;Kim, Hyun-Sik;Park, Hye-Young;Ustinov, Evgeniy
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2004.05b
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    • pp.19-22
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    • 2004
  • The resonant planar transformer, which had power capacity of 300 W, input voltage of 220 V, output voltage of 15 V, and switching frequency of 500 kHz, was designed and manufactured by using the planar core with large effective area and the flat copper lead frames for miniaturization and high efficiency of the switching mode power supply (SMPS). As well as, a resonant converter equipped with the above mentioned planar transformer was manufactured and electromagnetic characteristics were investigated. The numerical value of turns for 1st and 2nd winding were 12 and 2 respectively. The self inductance of 1st winding was 33.2 ${\mu}H$, very low leakage inductance of 1.27 ${\mu}H$, and the coupling factor of 0.98 were obtained at switching frequency of 300 kHz. The high efficiency of 88.21 % for the SMPS equipped with planar transformer was obtained at power capacity of 300 W.

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LLC Resonant Converter using Proposed Planar Transformer (제안된 평면변압기를 이용한 LLC 공진컨버터)

  • Lee, Seung-Min;Kim, Eun-Soo;Chung, Bong-Gun;Lee, Jae-Sam;Kim, Yu-Seon;Huh, Dong-Young
    • The Transactions of the Korean Institute of Power Electronics
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    • v.17 no.2
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    • pp.121-128
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    • 2012
  • In this paper, a new planar transformer with a novel core configuration that can regulate the leakage inductance is proposed and described in detail. In order to design the slim size power system for flat panel TV, Two planar transformers applied to LLC resonant converter are connected in series at primary and in parallel by the center-tap winding at secondary. In this paper, a 300W low profile LLC resonant converter was built and tested to verify the proposed planar transformer.

Forward Converter using Planar transformer and Lossless Snubber (Planar 변압기와 무손실 스너버를 사용한 포워드 컨버터)

  • 박경수;이재학;김춘삼;김윤호
    • Proceedings of the KIPE Conference
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    • 1999.07a
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    • pp.480-484
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    • 1999
  • In this paper, a design technique of SMPS using plannar transformer is described. The application of plannar transformer can solve the space problem which occurs when it is installed on PCB since plannar transformer has low profile. In addition a lossless snubber circuit added to reduce the device stress and to improve the system efficiency. The designed system is verifed by simulation and experiment with comparison of efficiency between the system using conventional transformer and the system using plannar transformer.

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Forward DC/DC Converter Using Planar Transformer (평면변압기적용 Forward DC/DC Converter)

  • Choi S. H.;Park J. Y.;Park S. S.;Kim E. S.;Lee H. Y.;Kim H. S.
    • Proceedings of the KIPE Conference
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    • 2003.11a
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    • pp.149-153
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    • 2003
  • In this paper, the design and implementation of a high power(300W) forward converter using a planar transformer is presented. The overall size and volume of the converter is decreased by replacing a planar transformer in stead of using a conventional winding transformer. Due to the decreased size and volume, power density of the applied forward converter is increased. Also, in this paper, the 300W ZVS forward converter with active clamp snubber circuit is compared to the 300W hard switching forward converter.

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Optimal Design of Boost Inductor using Planar Magnetics Component (Planar Magnetic 소자를 사용한 부스트 인덕터의 최적 설계)

  • Shin, Yong-Hee;Jang, Hai-Jin;Kim, Chang-Sun;Lee, Chul-Kyung;Youn, Dae-Young
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.1106-1107
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    • 2007
  • Planar magnetic based design technologies have been widely applied to power design for better cooling and ease of fabrication. The planar transformer and the planar inductor have a low profile characteristics compare to the conventional transformer which would be more cubical in volume. High frequency operation of magnetic components is a main key to achieve high power density of the power module. However, at a high frequency, the skin effect and the proximity effect have to be considered very significantly in magnetic design and also the parasitics in the converter cannot be ignored. This paper deals with the design and the experiment of planar integrated magnetic component. The optimal design for planar magnetics is summarized.

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A Study on the Characteristics of Circular Piezoelectric Transformner which has Multi-layered Crescent-Shaped Input Electrode (적층형 Crescent-Shaped Input Type 원형 압전변압기의 특성)

  • Jeong, Seong-Su;Park, Tae-Gone
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2006.11a
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    • pp.223-224
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    • 2006
  • This paper present a new disk-type piezoelectric transformer. The input side of the transformer has a crescent-shaped electrode and the output side has a focused poling direction. This transformer has multi-layered structure. The piezoelectric transformers operated m each transformer's resonance vibration mode. The electrodes and poling directions on commercialy available piezoelectric ceramic disks were designed so that the planar or shear mode coupling factor ($k_p,\;k_{15}$) becomes effective rather than the transverse mode coupling factor ($k_{31}$). The Resonance frequency is 65.22[kHz] and maximum voltage step-up ratio is 149. Multi-layered transformer has better efficiency and step-up ratio than the single-layered transformer.

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Design of on Automotive HID Ballast using Variable Frequency Switching Flyback Converter (가변주파수 스위칭 Flyback 컨버터를 이용한 자동차용 고압방전등 안정기의 설계)

  • Um, Tae-Wook;Kim, Yoon-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.22 no.4
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    • pp.166-171
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    • 2008
  • This paper presents high efficiency control system of automotive 35W electronic ballast for high intensity discharge(HID) lamp using switching flyback converter with variable frequency. Considering performance, size and efficiency of ballast, the flyback converter is designed with planar transformer in converter stage. HID lamp demands a highly efficient ballast and very complex control circuitry that can control complex transient state for applying to automotive. The proposed electronic ballast system is composed of a flyback converter using planar transformer, a full bridge inverter, and a step up igniter. In this system, switching frequency of flyback converter is controlled by varying input voltage of HID ballast and the price and the size of HID ballast using planar transformer can be reduced. The performance and efficiency of the posed system are verified through various the experiment results.