• 제목/요약/키워드: Asymmetric half-bridge converter

검색결과 21건 처리시간 0.022초

Bidirectional Dual Active Half-Bridge Converter Integrated High Power Factor Correction

  • Ngo, AnhTuan;Nam, Kwanghee
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2011년도 전력전자학술대회
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    • pp.444-446
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    • 2011
  • A bidirectional dual active converter with the power factor control capability is proposed as a battery charger. The source side half-bridge acts as a PWM converter that maintains the unity power factor. The battery side half-bridge converter acts as a dual active bridge (DAB) together shares the same DC link voltage with PWM converter. The imbalance voltage phenomenon is eliminated by employing asymmetric duty cycle technique. Simulation results are included to verify theoretical analysis.

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넓은 입력 전압 범위에서 작은 트랜스포머 오프셋 전류를 가지는 비대칭 하프-브리지 컨버터 (An Asymmetric Half-Bridge Converter with Reduced Transformer Offset Current in Wide Input Voltage Range)

  • 한정규;김종우;문건우
    • 전력전자학회논문지
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    • 제22권5호
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    • pp.431-439
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    • 2017
  • An asymmetric half-bridge is one of the most promising topology in low-power application because of its small number of components and inherent zero-voltage switching capability. However, when it is designed taking into a hold-up time, it has large transformer offset current and small transformer turns-ratio, which severely decreases the total efficiency of s converter. In this paper, a new boost-integrated asymmetric half-bridge converter is proposed to solve these problems. The integrated boost converter compensates the hold-up time, thus facilitating optimal design in nominal state. As a result, the proposed converter can achieve high efficiency in nominal state. To verify the effectiveness of the proposed converter, an experiment is conducted using a 250-400 V input and 45 V/3.3 A output prototype.

An Improved Asymmetric Half-Bridge Converter for Switched Reluctance Motor in Low-Speed Operation with Current Regulated Mode

  • Woothipatanapan, Sakhon;Chancharoensook, Phop;Jangwanitlert, Anuwat
    • Journal of Power Electronics
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    • 제15권6호
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    • pp.1533-1546
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    • 2015
  • This study presents a novel method for reducing the switching losses of an asymmetric half-bridge converter for a three-phase, 12/8 switched reluctance motor operated in low speed. In particular, this study aims to reduce the switching-off losses of chopping switches in the converter when operated in the current regulated mode (chopping mode). The proposed method uses the mixed parallel operation of IGBT (chopping switch) and MOSFET (auxiliary switch). MOSFET is precisely controlled to momentarily conduct prior to the turn-off interval of the IGBT. Consequently, the voltage across the switches is clamped to approximately zero, substantially decreasing the turn-off switching losses. The analytical expressions of power losses are extensively elaborated. Compared with the conventional asymmetric half-bridge converter, the modified converter can effectively minimize the switching losses. Therefore, the efficiency of the converter is eventually improved. Computer simulation and experimental results confirm the effectiveness of the proposed technique.

Takagi-Sugeno Fuzzy Integral Control for Asymmetric Half-Bridge DC/DC Converter

  • Chung, Gyo-Bum
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제7권1호
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    • pp.77-84
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    • 2007
  • In this paper, Takagi-Sugeno (TS) fuzzy integral control is investigated to regulate the output voltage of an asymmetric half-bridge (AHB) DC/DC converter; First, we model the dynamic characteristics of the AHB DC/DC converter with state-space averaging method and small perturbation at an operating point. After introducing an additional integral state of the output regulation error, we obtain the $5^{th}$-order TS fuzzy model of the AHB DC/DC converter. Second, the concept of the parallel distributed compensation is applied to design the fuzzy integral controller, in which the state feedback gains are obtained by solving the linear matrix inequalities (LMIs). Finally, simulation results are presented to show the performance of the considered design method as the output voltage regulator and compared to the results for which the conventional loop gain method is used.

Current-Doubler 정류방식을 적용한 ZVS 비대칭 하프브리지 컨버터에 관한 연구 (A study on asymmetric Half-Bridge converter with Current-Doubler rectifier)

  • 이대혁;김용;배진용;권순도;이규훈;조규만
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.169-172
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    • 2004
  • This paper presents the Asymmetric Half-Bridge converter using current-doubler rectifier. Resonant conditions of the asymmetrical soft switching Half-Bridge converter is analyzed. Current-doubler converter has small voltage and current ripple. The comparison of topology compared to the secondary rectification for center-tap type and current-doubler type are discussed. Experimental result are obtained on a 5V, 20A DC/DC Half-Bridge converter MOSFET based prototype for the 100W.

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Application of Fuzzy Integral Control for Output Regulation of Asymmetric Half-Bridge DC/DC Converter with Current Doubler Rectifier

  • Chung, Gyo-Bum;Kwack, Sun-Geun
    • Journal of Power Electronics
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    • 제7권3호
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    • pp.238-245
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    • 2007
  • This paper considers the problem of regulating the output voltage of a current doubler rectified asymmetric half-bridge (CDRAHB) DC/DC converter via fuzzy integral control. First, we model the dynamic characteristics of the CDRAHB converter with the state-space averaging method, and after introducing an additional integral state of the output regulation error, we obtain the Takagi-Sugeno (TS) fuzzy model for the augmented system. Second, the concept of parallel distributed compensation is applied to the design of the TS fuzzy integral controller, in which the state feedback gains are obtained by solving the linear matrix inequalities (LMIs). Finally, numerical simulations of the considered design method are compared to those of the conventional method, in which a compensated error amplifier is designed for the stability of the feedback control loop.

PDP 유지전원단을 위한 넓은 영전압 스위칭 범위를 갖는 새로운 고효율 DC/DC 컨버터 (A New High Efficiency DC/DC Converter with Wide ZVS Range for PDP Sustain Power Module)

  • 박기범;김정은;문건우;윤명중
    • 전력전자학회논문지
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    • 제10권2호
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    • pp.177-185
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    • 2005
  • 기존의 비대칭 하프브릿지 컨버터로부터 변형된 새로운 고효율 DC/DC 컨버터를 제안한다. 제안된 컨버터는 기존의 비대칭 하프브릿지 컨버터와 비교하여 넓은 ZVS영역을 가지므로 넓은 부하 범위에 걸쳐서 높은 효율을 자랑한다. 본 논문에서는 기존의 하프브릿지 컨버터와 비교하여 제안된 컨버터의 기본동작 및 특성을 분석하였으며, PDP TV 유지전원단 사양의 425W, 385-170Vdc 시험모델을 제작하여 실험결과를 통하여 제안된 컨버터의 우수성을 입증하였다.

Investigation of PID Fuzzy Controller for Output Voltage Regulation of Current-Doubler-Rectified Asymmetric Half-Bridge DC/DC Converter

  • Chung, Gyo-Bum
    • Journal of Power Electronics
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    • 제7권1호
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    • pp.21-27
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    • 2007
  • This paper investigates a PID fuzzy controller for output voltage regulation of a current-doubler-rectified asymmetric half-bridge (CDRAHB) DC/DC converter. The controller is a PD-type fuzzy controller in parallel with a linear integral controller. The PD type fuzzy controller is for providing the varying gain at the different operating conditions to regulate the output voltage. The linear integral controller is for removing the steady-state error of the output voltage. In order to show the outstanding dynamic characteristics of the proposed controller, PSIM simulation studies are carried out and compared to the results for which the conventional loop gain design method is used.

A New Four Level Half-bridge Converter

  • Cho, In-Ho;Yi, Kang-Hyun;Cho, Kyu-Min;Kim, Young-Do;Moon, Gun-Woo
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2008년도 하계학술대회 논문집
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    • pp.514-516
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    • 2008
  • A new four level half-bridge converter is proposed in this paper. Compared to a conventional half-bridge converter and an asymmetric half-bridge converter, the proposed converter has less stress on power switching components and have smaller output inductor. Zero-voltage-switching condition is also achieved with the proposed converter. The operational principle, DC conversion ratio and ZVS analysis are presented. Experimental results are demonstrated to verify the feasibility and advantages of the new topologies.

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Design Considerations of Asymmetric Half-Bridge for Capacitive Wireless Power Transmission

  • Truong, Chanh Tin;Choi, Sung-Jin
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2019년도 전력전자학술대회
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    • pp.139-141
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    • 2019
  • Capacitive power transfer has an advantage in the simplicity of the energy link structure. So, the conventional phase -shift full bridge sometime is not always the best choice because of its complexity and high cost. On the other hand, the link capacitance is usually very low and requires high-frequency operation, but, the series resonant converter loses zero-voltage switching feature in the light load condition, which makes the switching loss high especially in CPT system. The paper proposes a new low-cost topology based on asymmetric half-bridge to achieve simplicity as well as wide zero voltage switching range. The design procedure is presented, and circuit operations are analyzed and verified by simulation.

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