• Title/Summary/Keyword: Interleaved converter

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Two Phase Interleaved LLC Resonant Converter (Two Phase Interleaved LLC 공진 컨버터)

  • Kim, Joo-Hoon;Lee, Kwang-Ho;Kim, Eun-Soo;Lee, Jae-Sam;Lee, Hyun-Kwan;Jung, Yong-Chae
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.5
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    • pp.397-405
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    • 2009
  • Nowadays, power supplies for LCD TV of larger and slimmer screen size are required to have high power density and high efficient characteristics. In order to meet these requirements, Multi-phase interleaved LLC resonant converter is applied for increasing power density and reducing the current rating in the used devices. In this paper, gain characteristics and the experimental results of the proposed two-phase LLC resonant converter which implemented by the simple control circuit are verified based on the theoretical analysis and the 300W experimental prototype.

Characteristic Analysis of Multi-Phase Interleaved Boost Converter in Discontinuous Inductor Current Mode (불연속 전류모드에서의 다상 교호 승압컨버터의 특성 해석)

  • Jang, Eun-Sung;Chung, Se-Kyo;Shin, Hwi-Beom
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.5
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    • pp.898-904
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    • 2007
  • This paper presents the generalized and explicit expressions for evaluating the performance of the multi-phase interleaved boost converter (IBC) operating in discontinuous inductor current mode (DICM). The full order averaged model is derived. The generalized transfer functions of interest are presented and the dynamic characteristics are analyzed. The generalized analysis of converter performance is verified through the experimental and simulation results.

A Soft Switching Scheme using a Single Resonant Inductor in Interleaved Boost Converter (Interleaved 부스트 컨버터에서 단일 공진 인덕터를 이용한 소프트 스위칭 기법)

  • Park, Nam-Ju;Lee, Dong-Myung;Ha, Dong-Hyun;Hyun, Dong-Seok
    • The Transactions of the Korean Institute of Power Electronics
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    • v.13 no.4
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    • pp.263-269
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    • 2008
  • In this paper, an interleaved boost converter (IBC) with ZVT cell using a single resonant inductor in continuous conduction mode (CCM) is proposed. The IBC with the proposed ZVT cell has advantages such as a simple circuit, reduced size and low cost by using a single resonant inductor. It is more suitable for high power applications. The proposed ZVT cell circuit and principles for the IBC are explained in detail. The validity of the IBC with proposed ZVT cell is verified through experimental results.

Current Ripple Reduction Method of 3-phase Interleaved Bidirectional DC-DC Converter with the Consideration of Input and Output Voltage Variation (입·출력 전압 변동을 고려한 3상 인터리브드 양방향 DC-DC컨버터의 전류리플 저감 기법)

  • Sun, Daun;Jung, Jae-Hun;Nho, Eui-Cheol;Joung, Gyu-Bum
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.5
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    • pp.427-433
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    • 2016
  • This paper proposes a new method for the current ripple reduction of a three-phase interleaved bidirectional DC-DC converter. Usually, the three-phase interleaved bidirectional DC-DC converter is used for battery charging and discharging to reduce battery current ripple. In V2G application, a PWM AC-DC converter is used to connect the AC power grid and three-phase interleaved bidirectional DC-DC converter for battery charging and discharging. The magnitude of DC link voltage affects the battery current ripple magnitude. Therefore, the magnitude of the battery ripple current is analyzed with variations of battery and DC link voltages. The ripple current magnitude is found to be minimized by controlling the DC link voltage. Simulation and experimental results show the usefulness of the proposed method.

Input/Output Ripple Analysis of Interleaved Soft Switching Boost Converter (인터리브드 소프트 스위칭 부스트 컨버터의 입출력 리플 분석)

  • Jung, Doo-Yong;Ji, Young-Hyok;Kim, Young-Real;Jung, Yong-Chae;Won, Chung-Yuen
    • The Transactions of the Korean Institute of Power Electronics
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    • v.17 no.2
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    • pp.182-189
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    • 2012
  • In this paper, the input current and output voltage ripple of the soft switching interleaved boost converter was analyzed. Ripples of input current and output voltage with an interleaved method is analysed and as a result, the facts that it has lower ripple current than conventional interleaved method is verified. it means that a capacity of a main inductor can be reduced. Besides, a low capacitance of capacitor which means high lifetime and confidence can be used because of reducing ripples of output voltage. In order to verify the validity of the proposed converter used 10uF film capacitor, experiment was performed, and the efficiency of the proposed converter was measured with variable load and duty conditions.

A Switching Method for Minimizing the Over Current in Transient Response of 3-phase Interleaved Bidirectional DC-DC Converter with Frequency Modulation (주파수 변조 방식 3상 인터리브드 양방향 DC-DC 컨버터의 과도상태 과전류를 최소화하기 위한 스위칭 기법)

  • Bae, Jongwoo;Jeong, Hyesoo;Jung, Jae-Hun;Nho, Eui-Cheol
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.6
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    • pp.530-537
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    • 2016
  • This work deals with a switching method for minimizing overcurrent in a three-phase interleaved bidirectional DC-DC converter with frequency modulation. Generally, a three-phase interleaved DC-DC converter is used to reduce a current ripple component. The combined operation of three-phase and two-phase converters can significantly reduce the ripple component. However, the conventional PWM method cannot solve severe overcurrent during phase transfer or frequency variation for power control. To overcome this problem, this work proposes a new PWM switching method. A 3 kW DC-DC power converter is designed and implemented, and the converter is operated in discontinuous current mode with varying switching frequencies for power control. Simulation and experimental results show the validity of the proposed switching method. The proposed switching method can be widely used in the field of current ripple reduction for three-phase interleaved bidirectional DC-DC converters.

Design and Experiment of Three-phase Interleaved DC-DC Converter for 5kW Lead-Acid Battery Charger (5kW 배터리 충전기용 양방향 3상 인터리브드 DC-DC 컨버터 설계 및 실험)

  • Lee, Wu-Jong;Eom, Ju-Kyoung;Han, Byung-Moon;Cha, Han-Ju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.3
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    • pp.227-233
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    • 2011
  • This paper proposes a design and experiment of three phase interleaved dc-dc converter for 5kW battery charger. The charger consists of a three-phase interleaved dc-dc converter, which interfaces batteries and DC link, and a grid connected inverter. Lead-acid battery is modeled in a simple R-C model by matlab. Parameters of the battery are estimated based on step current discharging test. The battery is connected to three-phase interleaved DC-DC converter in order to reduce the ripple current to the battery and so, increase the lifetime of battery. Controller for charging and discharging mode is designed and tested in a 5kW charger prototype.

Multi-Phase Interleaved ZVT Boost Converter With a Single Soft-Switching Cell (단일 소프트 스위칭 셀을 가진 다상 Interleaved ZVT Boost 컨버터)

  • Lee, Joo-Seung;Hwang, Yun-Seong;Kang, Sung-Hyun;Kwon, Man-Jae;Jang, Eunsu;Lee, Byoung-Kuk
    • The Transactions of the Korean Institute of Power Electronics
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    • v.27 no.3
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    • pp.247-255
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    • 2022
  • This paper proposes a multiphase interleaved zero-voltage-transition boost converter with a single soft-switching cell for high-voltage DC-DC converter (HDC) of fuel cell systems. The proposed single soft-switching cell structure can reduce the system volume by minimizing the passive and active elements added even in the multiphase-interleaved structure. To analyze the feasibility of the proposed structure, this paper mathematically analyzes the operation modes of the converter with the proposed single soft-switching cell structure and presents guidelines for design and considerations. In addition, the feasibility of the 210[kW] HDC was confirmed through PSIM simulation, and the system volume reduction of up to 10.48% was confirmed as a result of the 5[kW] HDC test-bed experiment considering the fuel cell system. Through this, the validity of the proposed structure was verified.

A new interleaved high step up converter with low voltage stress on the main switches

  • Tohidi, Babak;Delshad, Majid;Saghafi, Hadi
    • Smart Structures and Systems
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    • v.26 no.4
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    • pp.521-531
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    • 2020
  • In this paper, a new interleaved high step-up converter with low voltage stress on the switches is proposed. In the proposed converter, soft switching is provided for all switches by just one auxiliary switch, which decreases the conduction loss of auxiliary circuit. Also, the auxiliary circuit is expanded on the converter with more input branches. In the converter all main switches operate under zero voltage switching condition and auxiliary switch operate under zero current switching condition. Because of the interleaved structure, the reliability of converter increases and input current ripples decreases. The clamp capacitor in the converter not only absorb the voltage spikes across the switch due to leakage inductance, but also improve voltage gain. The proposed converter is fully analyzed and to verify the theoretical analysis, a 100 W prototype was implemented. Also, to show the effectiveness of auxiliary circuit on conduction EMI, EMI of the proposed converter comprised with hard switching counterpart.

Inductor Characteristics Analysis in High Power Interleaved Buck Converter

  • Yun, Chul;Yoon, Byungkeun;Kwon, Woohyen;Kim, Woohyun
    • IEIE Transactions on Smart Processing and Computing
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    • v.6 no.1
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    • pp.47-52
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    • 2017
  • Inductor in high power converter system increases production cost, volume and core loss proportional to the power. To decrease these disadvantages, this paper analyzed the characteristic of parallel-inductor and coupled-inductor in interleaved system with simulation. As a result, it is confirmed that two-phase interleaved non-coupled buck-converter has the best characteristic among three types converter.