• Title/Summary/Keyword: bridge circuit

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Application of Welding Machine Circuit of Full Bridge Converter using Circuit Averaging Method (회로평륜화기법을 이용한 풀 브리지 컨버터의 용접기 주회로 응용)

  • 구헌희;서기영;권순걸;이현우;김상돈
    • The Transactions of the Korean Institute of Power Electronics
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    • v.5 no.4
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    • pp.327-334
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    • 2000
  • In this paper, the circuit model using circuit averaging method for full bridge for full bridge converter is suggested. This model can represent the physical characteristics of converter circuits appropriately. At most of high capacity DC-DC converter application parts, full bridge converter is adapted for main circuit of power supply. Design and analysis of full bridge converter is no trouble with circuit model. The validity of circuit model is verified through computer simulation and practical welding experiment of welding machine with full bridge converted model.

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The Driving Circuit Design for ZVS Full-Bridge Converter with 1st Order Delay Circuit (1차 지연회로를 사용한 ZVS Full-Bridge 컨버터 구동회로 설계)

  • Cho, Nae-Soo;Choi, Youn-Ho;Yoon, Kyung-Sup;Koo, Bon-Ho;Kwon, Woo-Hyen
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.3
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    • pp.569-574
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    • 2010
  • The full bridge converter have been used for high power system that is needed to switch the big current. So, EMI and stability problem is occurred. The Soft switching method is the solution to solve the above problem, But implementation of soft switching(ZVS: Zero Voltage Switching) is so complicate and expensive because of the DSP MCU and shift circuit. In this paper, we introduce the technical method for driving circuit of ZVS full bridge converter with 1st order delay circuit and logic elements. The realization of this method is so simple and cheap. The effectiveness of the proposed circuit is verified by experimental results.

Understanding the Principles of Wheatstone Bridge Circuit (휘트스톤 브리지 회로의 원리에 대한 이해)

  • Choi, Byung-Hee;Ryu, Chang-Ha
    • Explosives and Blasting
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    • v.35 no.2
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    • pp.9-17
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    • 2017
  • The Wheatstone bridge is an important electrical circuit that is widely used to measure extremely small resistance changes in strain gages. The strain gages are attached to the structure or specimen whose deformation is to be detected. The Wheatstone bridge finds one of its major applications in the areas of static and dynamic strength tests for various engineering materials. In the split Hopkinson pressure bar (SHPB) system, for example, the bridge circuit is required to measure the dynamic strains of the incident and transmitted bars along which the stress wave propagates. In this article, the principles of the Wheatstone bridge circuit are in detail explained for easy reference during laboratory experiments associated with rock dynamics. Especially, the circuit arrangements of the quater, half, and full bridges are presented with their basic uses.

Design of a Robust Half-bridge Driver IC to a Variation of Process and Power Supply (공정 및 공급전압 변화에 강인한 하프브리지 구동 IC의 설계)

  • Song, Ki-Nam;Kim, Hyoung-Woo;Kim, Ki-Hyun;Seo, Kil-Soo;Jang, Kyung-Oun;Han, Seok-Bung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.22 no.10
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    • pp.801-807
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    • 2009
  • In this paper, we propose a novel shoot-through protection circuit and pulse generator for half-bridge driver IC. We designed a robust half-bridge driver IC over a variation of processes and power supplies. The proposed circuit is composed a delay circuit using a beta-multiplier reference. The proposed circuit has a lower variation rate of dead time and pulse-width over variation of processes and supply voltages than the conventional circuit. Especially, the proposed circuit has more excellent pulse-width matching of set and reset signals than the conventional circuit. Also, the proposed pulse generator is prevented from fault operations using a logic gate. Dead time and pulse-width of the proposed circuit are typical 250 ns, respectively. The variation ratio is 68%(170 ns) of maximum over variation of processes and supply voltages. The proposed circuit is designed using $1\;{\mu}m$ 650 V BCD (Bipolar, CMOS, DMOS) process parameter, and the simulations are carried out using Spectre simulator of Cadence corporation.

Techniques to Diagnose Short-Circuit Faults in the Switching Mode Power Supply for Display (디스플레이용 스위칭모드 전원장치의 단락 고장분석 검출기법)

  • Lee, Jae-Won;Chun, Tae-Won
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.7
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    • pp.1186-1192
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    • 2016
  • This paper proposes techniques to diagnose short-circuit faults of both the diodes and power FET in switching mode power supply (SMPS) by using a simple analog tester. The diodes in full-bridge rectifier, power FET, switching transformer, and some sensors are modelled with resistor. The total resistance value measured at the input terminal of a SMPS is analyzed when the short-circuit faults of diodes in a full bridge rectifier or power FET are occurred. The short-circuit faults of one or two diodes in a full bridge rectifier, power FET, and both the diodes in a full bridge rectifier and power FET can be detected by a range of total resistance, which is measured by the analog tester. Through experiments, the theoretical analysis for total resistance under short-circuit faults can be verified.

A Study on Soft Switching of Single-Stage PFC AC/DC Full Bridge Converter (Single-Stage PFC AC/DC Full Bridge Converter의 소프트 스위칭에 관한 연구)

  • 임경내;성병기;계문호;권순재;김철우
    • Proceedings of the KIPE Conference
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    • 1998.07a
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    • pp.401-404
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    • 1998
  • This paper proposes a new soft switching single stage AC/DC full bridge converter with unit power factor and isolated output. This circuit shows that it is possible to combine the boost converter which is for PFC(Power Factor Correction) and full bridge converter which is for DC/DC converter. A simple auxiliary circuit which includes neither lossy components nor active switches eliminates ringing of secondary side of the transformer. The characteristics of the proposed circuit are investigated and the validity is verified by the simulation results.

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A Comparative Study of Two Diagnostic Methods Based on the Switching Voltage Pattern for IGBT Open-Circuit Faults in Voltage-Source Inverters

  • Wang, Yuxi;Li, Zhan;Xu, Minghui;Ma, Hao
    • Journal of Power Electronics
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    • v.16 no.3
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    • pp.1087-1096
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    • 2016
  • This paper reports an investigation conducted on two diagnostic methods based on the switching voltage pattern of IGBT open-circuit faults in voltage-source inverters (VSIs). One method was based on the bridge arm pole voltage, and the other was based on bridge arm line voltage. With an additional simple circuit, these two diagnostic methods detected and effectively identified single and multiple open-circuit faults of inverter IGBTs. A comparison of the times for the diagnosis and anti-interference features between these two methods is presented. The diagnostic time of both methods was less than 280ns in the best case. The diagnostic time for the method based on the bridge arm pole voltage was less than that of the method based on the bridge arm line voltage and was 1/2 of the fundamental period in the worst case. An experimental study was carried out to show the effectiveness of and the differences between these two methods.

A Study on the Synchronous Rectifier Driver Circuits in the LLC Resonant Half-Bridge Converter (LLC 공진형 하프브릿지 컨버터의 동기정류기 구동회로에 관한 연구)

  • Ahn, Tae-Young;Im, Bum-Sun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.30 no.1
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    • pp.79-86
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    • 2016
  • In this paper, we propose a current-driven synchronous rectifier driver circuit for LLC resonant half-bridge converters. The proposed driver circuit detects a relatively low current in the primary side of the transformer although a large current is flowing in the secondary side. Due to this feature, the driver circuit has a simple circuit structure and stabilizes the switching operation with a logic-level switching voltages for the synchronous rectifier. The operation and performance of the proposed driver circuit are confirmed with a prototype of 1kW class LLC resonant half-bridge converter. The experimental results proved that the proposed synchronous rectifier driver method improves the power conversion efficiency by around 1% and reduces the internal power loss by 17W.

A Phase-Shifted Full-Bridge Converter With a New Rectifier Circuit for Reducing Circuiting Current (순환전류 감소를 위한 새로운 정류회로를 갖는 위상천이 풀브리지 컨버터)

  • Choi, Byoung-Gi;Lee, Woo-seok;Lee, Il-Oun
    • The Transactions of the Korean Institute of Power Electronics
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    • v.26 no.3
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    • pp.237-240
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    • 2021
  • This research proposes a new rectifier circuit to reduce the circulating current of a phase-shifted full bridge converter. The proposed circuit is a structure in which the output inductor of the secondary rectifier circuit is changed to a coupled inductor in the phase-shifted full bridge with the existing center-tapped rectifier. The parts are rearranged after adding a diode. After applying the proposed circuit, the circulating current to the primary current of the transformer and the voltage stress of the rectifier diode on the secondary side of the transformer are reduced. Accordingly, the snubber loss of the rectifier is improved. By reducing the circulating current and snubber loss, the circuit achieves higher efficiency than conventional circuits. In this research, we present the structure of the proposed circuit, its strengths, and the analysis results from experiments. Furthermore, its effectiveness is verified through the experimental results of a prototype converter with an input of 300-400 V and an output of 50 V/1 kW.

Design of Bootstrap Power Supply for Half-Bridge Circuits using Snubber Energy Regeneration

  • Chung, Se-Kyo;Lim, Jung-Gyu
    • Journal of Power Electronics
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    • v.7 no.4
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    • pp.294-300
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    • 2007
  • This paper deals with a design of a bootstrap power supply using snubber energy regeneration, which is used to power a high-side gate driver of a half-bridge circuit. In the proposed circuit, the energy stored in the low-side snubber capacitor is transferred to the high-side bootstrap capacitor without any magnetic components. Thus, the power dissipation in the RCD snubber can be effectively reduced. The operation principle and design method of the proposed circuit are presented. The experimental results are also provided to show the validity of the proposed circuit.