• Title/Summary/Keyword: Half-bridge

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ZVS Half-bridge Converter of Simple Structure (간단한 구조의 영전압스위칭 하프브리지 컨버터)

  • Yoo, Doo-Hee;Jeong, Gang-Youl;Lee, Jae-Min
    • Proceedings of the KIPE Conference
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    • 2007.07a
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    • pp.444-446
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    • 2007
  • This paper presents a ZVS (Zero Voltage Switching) half-bridge converter of simple structure. The operational principle of the proposed converter is explained, briefly. It is shown through that the experimental results the proposed converter operates excellently as a high efficiency converter. As the proposed converter utilizes the transformer leakage inductor as the resonant inductor, its structure is simplified.

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Characteristic Analysis of Asymmetrical Half-Bridge Converter (하프 브리지 컨버터의 비대칭 제어 동작 특성 분석)

  • Ahn, Jung-Rok;Jang, Do-Hyun
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.1157-1159
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    • 2003
  • In this paper, resonant characteristics of the asymmetrical soft switching half bridge converter is analyzed. The operation principle for proposed converter is explained in steady-state and its operation characteristics by switching frequency is presented with experimental result. Experimental results carried out on a system prototype are included in this paper.

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An Asymmetrical Half-Bridge Dc-to-Dc Converter Employing Charge Control (전하 제어를 적용한 비대칭 하프 브리지 직류-직류 컨버터)

  • Lim, Won-Seok;Choi, Byung-Cho
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.1184-1186
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    • 2003
  • In this paper, a charge controlled asymmetrical half-bridge (ASHB) dc-to-dc converter is presented. For ASHB do-to-dc converter, the peak current-mode control was found to be problematic primarily due to the oscillatory behavior of the current feedback signal. To resolve this problem, a charge control method is applied to the ASHB do-to-dc converter. A 50W prototype ASHB dc-to-dc converter was built, and successfully tested.

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A New Topology of Four-Level Hybrid Half-Bridge Flying-Capacitor Inverter (4-레벨 하이브리드 하프 브리지 플라잉 캐패시터 인버터의 새로운 토폴로지)

  • Pribadi, Jonathan;Lee, Dong-Choon
    • Proceedings of the KIPE Conference
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    • 2019.07a
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    • pp.315-316
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    • 2019
  • This paper proposes the operation scheme and control method for a four-level hybrid half-bridge flying-capacitor inverter (4L-HHBFCI). With in-phase disposition level-shifted modulation (IPD), the flying capacitor voltage ripple is less than 1% of the reference value, while the line-to-line voltage total harmonic distortion is 23.27% at unity modulation index. The performance and effectiveness of the proposed inverter operation have been verified by simulation results.

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A Study on 3-level Communication Method using Half-Bridge (Half-Bridge를 이용한 3-레벨 통신방식에 관한 연구)

  • Park, Sung-Jun;Hong, Sung-Mun;Lim, Sang-Kil
    • Proceedings of the KIPE Conference
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    • 2019.07a
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    • pp.245-247
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    • 2019
  • 본 논문에서는 시분할 방식에 의한 전이중 통신방식을 사용할 경우 통신속도에 대한 단점을 극복하기 위해 통신신호 레벨에 의한 완전한 전이중 통신방식 구현이 가능한 새로운 통신용 하드웨어 장비를 제안한다. 제안된 통신하드웨어는 2선 방식 통신으로 통신하는 두 장비에서 동일 통신선에 발신신호를 인가함과 동시에 수신 신호를 검출할 수 있는 방식으로 동 시간에 발신과 수신이 가능한 구조이다.

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Design of Partial Half-Through Type Plate Girder Railway Bridge (부분중로형 판형 철도교의 계획과 설계)

  • Kim, Sung-Won;Kwon, So-Jin;Kim, Jong-Hee;Han, Chul
    • Proceedings of the KSR Conference
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    • 2001.10a
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    • pp.299-303
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    • 2001
  • In this paper, we introduce the Partial Half-Through Type Plate Girder Bridge proposed by Hyundai Development Co. and KRTC Consortium in Turn-Key Based design last year, and this type of bridge may be adapted to the railway bridge under similar conditions. This bridge across the North Han River was to be concerned its find view and the protection of water source. For its location is inside the dam, it required the long span and the clearance for the flood also. Its new composite section was able to diminish the deflection and vibration. Its shop-fabrication could control its quality easily, and might to be launched. This structural type have satisfied its functions, construction situations, and overall safeties, so this is the field-oriented type. However the composition and connections of the proposed members are different to the recent forms, and difficult to be applied to present specifications. Therefore it requires a certification on the application for more safety by not only analytical verifications but also experimental studies. Nevertheless, this type of bridge may have some more applications from now on.

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High Efficiency Resonant Asymmetrical Half-Bridge Flyback Converter (고효율 공진형 비대칭 하프브리지 플라이백컨버터)

  • Jeong, Gang-Youl;Yoo, Doo-Hee
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.4
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    • pp.81-94
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    • 2010
  • This paper presents a high efficiency resonant asymmetrical half-bridge flyback converter. The primary half-bridge circuit of the converter operates by a soft-switching type using the asymmetrical pulse-width modulation (PWM) method with the resonant capacitance and transformer leakage inductance. The secondary flyback circuit of the proposed converter utilizes a synchronous rectifier, which operates by a new voltage-driven method with a simple drive circuit. Thus the proposed converter improves the total efficiency. This paper explains the operational principle of the proposed converter by each mode and shows the converter design consideration and a design example for the prototype converter, respectively. After that, the proposed simple driving technique of the synchronous rectifier by a voltage-driven method is explained, briefly. The designed prototype converter has wide input voltage (AC $V_{in,rms}$=75~265[V]), 5[V] DC output voltage, and 100[W] output power. To verify the excellent performance of the proposed converter, the designed prototype is implemented and experimented. The good performance of the proposed converter is shown through the experimental results.

Soft Switching of Half-Bridge Converter Using Saturable Core (포화자심을 이용한 하프브릿지 컨버터의 소프트스위칭에 관한 연구)

  • Kang , Chan-Ho;Kim , Hee-Jun;Harada, Koosuke;Sakamoto, Hiroshi
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.39 no.6
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    • pp.71-78
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    • 2002
  • A method of soft switching in the half bridge converter using a small saturable core is presented. For the soft switching, a small dead time of both switch off is made in a pair of MOSFET switch. The saturable core is of rectangular magnetization characteristics and the core flux swings from the minus to the plus saturation during ON time of the switch. The soft switching is realized in dead time by a resonance between the saturating inductance of the core and the stray capacitance of MOSFET. As an extension of this concept, instead of the saturable core, we propose a new soft switching circuit using a linear inductance and two switches, which is especially suitable for regulating the output and also for high frequency switching. A theoretical principle of soft switching presented here was confirmed by experiments on a half bridge converter of 1.25 KW.

A Novel Prototype of Duty Cycle Controlled Soft-Switching Half-Bridge DC-DC Converter with Input DC Rail Active Quasi Resonant Snubbers Assisted by High Frequency Planar Transformer

  • Fathy, Khairy;Morimoto, Keiki;Suh, Ki-Young;Kwon, Soon-Kurl;Nakaoka, Mutsuo
    • Journal of Electrical Engineering and Technology
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    • v.2 no.1
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    • pp.89-97
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    • 2007
  • This paper presents a new circuit topology of active edge resonant snubbers assisted half-bridge soft switching PWM inverter type DC-DC high power converter for DC bus feeding power plants. The proposed DC-DC power converter is composed of a typical voltage source-fed half-bridge high frequency PWM inverter with a high frequency planar transformer link in addition to input DC busline side power semiconductor switching devices for PWM control scheme and parallel capacitive lossless snubbers. The operating principle of the new DC-DC converter treated here is described by using switching mode equivalent circuits, together with its unique features. All the active power switches in the half-bridge arms and input DC buslines can achieve ZCS turn-on and ZVS turn-off commutation transitions. The total turn-off switching losses of the power switches can be significantly reduced. As a result, a high switching frequency IGBTs can be actually selected in the frequency range of 60 kHz under the principle of soft switching. The performance evaluations of the experimental setup are illustrated practically. The effectiveness of this new converter topology is proved for such low voltage and large current DC-DC power supplies as DC bus feeding from a practical point of view.

A Study on the Optimal Design of LLC Resonant Half-bridge dc-dc Converter Using a Steady-state Model with Internal Loss Resistors (내부 손실 저항이 있는 정상상태 모델을 이용한 LLC 공진형 하프 브리지 dc-dc컨버터의 최적 설계에 관한 연구)

  • Yoo, Jeong Sang;Ahn, Tae Young
    • Journal of the Semiconductor & Display Technology
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    • v.21 no.3
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    • pp.80-86
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    • 2022
  • In this paper, the optimal design and circuit simulation verification results of an LLC resonant half-bridge dc-dc converter using a steady-state model with internal loss resistance are reported. Above all, the input/output voltage gain and frequency characteristic equations in the steady-state were derived by reflecting the internal loss resistance in the equivalent circuit. Based on the results, an LLC resonant half-bridge dc-dc converter with an input voltage of 360-420V, an output voltage of 54V, and a maximum power of 3kW was designed, and to verify the design, the PSIM circuit simulation was executed to compare and analyze the result. In particular, the operating range of the converter could be drawn from the frequency characteristic graph of the voltage gain, and when the converter was operated under light and maximum load conditions, it was confirmed that similar results were obtained by comparing simulation results and calculation results in the switching frequency characteristic graph. In addition, the change of the switching frequency with respect to the load current at each input voltage was compared with the calculated value and the simulation result. As a result, it was possible to confirm the usefulness of the analysis result reflecting the internal loss resistance proposed in this paper and the process of the optimal design.