• Title/Summary/Keyword: Half-bridge

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Design of the Driver IC for 500 V Half-bridge Converter using Single Ended Level Shifter with Large Noise Immunity (잡음 내성이 큰 단일 출력 레벨 쉬프터를 이용한 500 V 하프브리지 컨버터용 구동 IC 설계)

  • Park, Hyun-Il;Song, Ki-Nam;Lee, Yong-An;Kim, Hyoung-Woo;Kim, Ki-Hyun;Seo, Kil-Soo;Han, Seok-Bung
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.21 no.8
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    • pp.719-726
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    • 2008
  • In this paper, we designed driving IC for 500 V resonant half-bridge type power converter, In this single-ended level shifter, chip area and power dissipation was decreased by 50% and 23.5% each compared to the conventional dual-ended level shifter. Also, this newly designed circuit solved the biggest problem of conventional flip-flop type level shifter in which the power MOSFET were turned on simultaneously due to the large dv/dt noise. The proposed high side level shifter included switching noise protection circuit and schmmit trigger to minimize the effect of displacement current flowing through LDMOS of level shifter when power MOSFET is operating. The designing process was proved reasonable by conducting Spectre and PSpice simulation on this circuit using 1${\mu}m$ BCD process parameter.

Transcranial Magnetic Stimulation using Cockroft-Walton Circuit and Half Bridge Resonant Inverter (코크로프트-월톤회로와 반파공진인버터를 적용한 경두개 자기자극장치)

  • Kim, Whi-Young;HwangBo, Gak
    • The Journal of the Korea Contents Association
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    • v.10 no.4
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    • pp.257-264
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    • 2010
  • Though existent a transcranial magnetic stimulation makes various treatment and diagnostic sine waveform of fixed stimulation pulse, there is limitation. In this research, because strength, pulse width, pulse pattern required in treatment and diagnostic introduce other Cockroft-Walton circuit and half bridge inverter frequency and voltage variable become new device propose wish to. Have more advantages than existing device. First, do not have high voltage transformer. Second, switching loss can be less, and control output energy precisely. Three, stimulation strengths, pulse width, pulse pattern are various. As a result, sought special quality and an experiment that is improved applying inverter and cockroft - Walton circuit is half bridge inverter that do not use transformer.

A New Asymmetrical PWM Bidirectional Half Bridge Converter for Wide Input Voltage Range Applications (넓은 입력 전압 범위를 갖는 새로운 비대칭 PWM 방식의 양방향 하프브리지 컨버터)

  • Kim, Jeong-Geun;Choi, Se-Wan;Park, Rae-Kwan;Chang, Seo-Geon
    • The Transactions of the Korean Institute of Power Electronics
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    • v.14 no.3
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    • pp.235-242
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    • 2009
  • In this paper a new asymmetrical PWM bidirectional half bridge converter is proposed. The proposed converter has simple structure and wide duty cycle range, and therefore is suitable for applications such as fuel cells which have wide voltage variation. With the proposed asymmetrical PWM method the current rating of switch and transformer is significantly reduced compared to the conventional phase angle control method, and ZVZCS and synchronous rectification can also be achieved. This could result in high efficiency and high power density. The proposed converter is analytically compared to the conventional converter, and the proposed method was validated through the experiment.

Operational Principles and Decoupled Power Control of Three-Ports Half Bridge Converter for DC Microgrid System (DC 마이크로 그리드를 위한 Three-Ports Half Bridge 컨버터의 동작원리 및 독립 전력 제어에 관한 연구)

  • Sim, Ju-Young;Choi, Hyun-Jun;Lee, Jun-Young;Jung, Jee-Hoon
    • Proceedings of the KIPE Conference
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    • 2018.07a
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    • pp.228-230
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    • 2018
  • DC 마이크로 그리드를 위한 Three-Ports Half Bridge (THB) 제안하고 THB 컨버터의 효과적인 제어를 위한 동작 원리 및 수학적 모델링 그리고 각 포트 간의 전력을 독립적으로 제어하는 디커플링(Decoupling) 방법을 제안하고자 한다. DC 마이크로 그리드에서는 수용자의 부하 상황에 따라 계통뿐만 아니라 분산 전원 및 에너지 저장장치(ESS) 등에서도 전력을 공급받을 수 있다. 이로 인해 기존 전력제어 시스템의 경우 2-포트 컨버터 2개가 필요하고, 이는 부피뿐만 아니라 소자의 개수도 증가시키기 때문에 제작 및 설치 단가가 상승한다는 단점이 있다. 3-포트 컨버터의 경우, 하나의 변압기를 이용하고 전력스위치와 수동소자의 개수를 줄일 수 있으므로 기존의 전력변환장치 대비 전력 밀도를 높일 수 있다. 하지만 하나의 변압기를 이용하여 3개의 포트가 연결되어 있어 서로 간의 전력간섭이 일어나고. 과도기 때 의도 하지 않은 전력의 흐름이 발생할 수 있게 된다. 본 논문에서는 수학적 모델링과 분석을 통해 3-포트 컨버터의 동작원리를 알아보고, 각 포트 간 전력 제어의 상호 간섭을 제거할 수 있는 디커플링 방법을 제안하고자 한다. 또한, 모의시험과 1 kW급 시작품을 이용하여 제안한 디커플링 전력제어 방법의 타당성을 검증하였다.

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Characteristic Estimation of Single-Stage High Frequency Resonant Inverter Link Type DC-DC Converter (단일 전력단 고주파 공진 인버터 링크형 DC-DC 컨버터의 특성평가)

  • Won, Jae-Sun;Kim, Hae-Jun;Park, Jae-Wook;Nam, Seung-Sik;Seo, Cheol-Sik;Kim, Dong-Hee
    • Proceedings of the KIEE Conference
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    • 2003.07b
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    • pp.1190-1192
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    • 2003
  • This paper presents a novel single-stage high frequency resonant inverter link type DC-DC converter using zero voltage switching with high input power factor. The proposed high frequency resonant converter integrates half-bridge boost rectifier as power factor corrector (PFC) and half-bridge resonant converter into a single stage. The input stage of the half-bridge boost rectifier is working in discontinuous conduction mode(DCM) with constant duty cycle and variable switching frequency. So that boost converter make the line current follow naturally the sinusoidal line voltage waveform. Experimental results have demonstrated the feasibility of the proposed DC-DC converter. This proposed converter will be able to be practically used as a power supply in various fields as induction heating applications, DC-DC converter etc.

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Half-bridge Cascaded Multilevel Inverter Based Series Active Power Filter

  • Karaarslan, Korhan;Arifoglu, Birol;Beser, Ersoy;Camur, Sabri
    • Journal of Power Electronics
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    • v.17 no.3
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    • pp.777-787
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    • 2017
  • A new single phase half-bridge cascaded multilevel inverter based series active power filter (SAPF) is proposed. The main parts of the inverter are presented in detail. With the proposed inverter topology, any compensation voltage reference can be easily obtained. Therefore, the inverter acts as a harmonic source when the reference is a non-sinusoidal signal. A 31-level inverter based SAPF with the proposed topology, is manufactured and the voltage harmonics of the load connected to the point of common coupling (PCC) are compensated. There is no need for a parallel passive filter (PPF) since the main purpose of the paper is to represent the compensation capability of the SAPF without a PPF. It is aimed to compensate the voltage harmonics of the load fed by a non-sinusoidal supply using the proposed inverter. The validity of the proposed inverter based SAPF is verified by simulation as well as experimental study. The system efficiency is also measured in this study. Both simulation and experimental results show that the proposed multilevel inverter is suitable for SAPF applications.

Fundamental Output Voltage Enhancement of Half-Bridge Voltage Source Inverter with Low DC-link Capacitance

  • Elserougi, Ahmed;Massoud, Ahmed;Ahmed, Shehab
    • Journal of Power Electronics
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    • v.18 no.1
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    • pp.116-128
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    • 2018
  • Conventionally, in order to reduce the ac components of the dc-link capacitors of the two-level Half-Bridge Voltage Source Inverter (HB-VSI), high dc-link capacitances are required. This necessitates the employment of short-lifetime and bulky electrolytic capacitors. In this paper, an analysis for the performance of low dc-link capacitances-based HB-VSI is presented to elucidate its ability to generate an enhanced fundamental output voltage magnitude without increasing the voltage rating of the involved switches. This feature is constrained by the load displacement factor. The introduced enhancement is due to the ac components of the capacitors' voltages. The presented approach can be employed for multi-phase systems through using multi single-phase HB-VSI(s). Mathematical analysis of the proposed approach is presented in this paper. To ensure a successful operation of the proposed approach, a closed loop current controller is examined. An expression for the critical dc-link capacitance, which is the lowest dc-link capacitance that can be employed for unipolar capacitors' voltages, is derived. Finally, simulation and experimental results are presented to validate the proposed claims.

Structural performance evaluation of bolted end-plate connections in a half-through railway inclined girder

  • Jung Hyun Kim;Chang Su Shim
    • Steel and Composite Structures
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    • v.49 no.5
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    • pp.473-486
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    • 2023
  • A through-railway bridge with an inclined girder has recently been applied to optimize the cross-section of a slender bridge structure in railway bridges. To achieve the additional cross-section optimization effect by the bolted end-plate connection, it is necessary to investigate the application of the bolted end-plate tension connection between the inclined girder and the crossbeam. This basic study was conducted on the application of the bolted end-plate moment connection of crossbeams to half-through girders with inclined webs. The combined behavior of vertical deflection and rotational behavior was observed due to the effect of the web inclination in the inclined girder where the steel crossbeam was connected to the girder by the bolted end-plate moment connection. Therefore, in the experiment, the deflection of the inclined girder was 1.77-2.93 times greater than that of the vertical girder but the lateral deflection of the inclined girder was 0.4 times less than that of the vertical girder. Moreover, the tensile stress of the upper bolts in the inclined girder with low crossbeams was clearly 0.81 times lower than that of the vertical girder. According to the results, the design formula for vertical girders does not reflect the influence of the web inclination. Therefore, this study proposed the design procedures for the inclined girder to apply the bolted end-plate moment connection of the crossbeam to the inclined girder by reflecting the design change factors according to the effect of the web inclination.

Wide Output Range AC/DC Converter for Rechargeable Battery of Electric Vehicle (광대역 출력을 가지는 전기자동차 배터리 충전용 AC/DC 컨버터)

  • Kim, Young-il;Kim, Hong-jung;Jun, Bum-su;Park, Gwi-chul;Choi, Jaeho
    • Proceedings of the KIPE Conference
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    • 2016.07a
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    • pp.73-74
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    • 2016
  • This paper proposes a wide output range AC/DC converter for a rechargeable battery of electric vehicle. In the proposed wide output range AC/DC converter for rechargeable battery of electric vehicle, the main transformer in the DC/DC stage is divided by two. Therefore, if the switch is connected to the middle tap, then half of the maximum voltage is applied. Otherwise, it can be applied the full range of the high voltage by connecting the switch to the whole tab. And also, it is designed to have a wide output voltage range by applying Vin/2 made by changing the full-bridge to half-bridge by using the bridge change switch of the input stage. As it can be supplied the wide range output voltage with a single module, it has the advantage of space utilization and cost reduction effect.

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Low-cost Single-Phase HAIf-bridge Active Power Filter with One Current Sensor (단일 전류센서를 갖는 저가의 단상 반브릿지 APF)

  • 김길동;신정렬;이우동;박현준;김희중
    • Journal of the Korean Society for Railway
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    • v.7 no.3
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    • pp.173-179
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    • 2004
  • This paper describes a low-cost single-phase active power filter, which consists of a half-bridge PWM inverter with a simple control circuit. In order to verify the performance of proposed active power filter, many computer simulations with EMTP codes and experimental works with a hardware prototype were done. Both results confirm that the proposed active power filter shows excellent performance to eliminate the harmonics generated in the single-phase non-linear load. The active power filter has advantage of low implementation cost and compact size, using a half-bridge inverter and a simple control circuit with only one current sensor. So, it can be fabricated as a plug-in type. This paper shows the necessity and a good possibility to apply such advantage to the electric railway system.