• 제목/요약/키워드: Power Electronics

검색결과 18,382건 처리시간 0.035초

STATIC AND DYNAMIC BEHAVIOR OF HIGH-CURRENT RECTIFIER DIODES IN RESISTANCE WELDING INVERTER POWER SOURCES

  • Mecke, Hubert;Doebbelin, Reinhard;Fischer, Wolfgang
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
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    • pp.1003-1007
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    • 1998
  • In recent years inverter power sources are more and more used for resistance welding processes. In this paper some results of investigation into the static and dynamic behavior of high-current rectifier diodes used in these inverter power sources will be discussed. By means of digital simulation, losses and efficiency have been determined depending on the power semiconductor parameters.

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Three-Phase Soft Switching Sinewave Inverter with Bridge Power Module Package Configurated Auxiliary Resonant AC Link Snubber

  • Iyomori Hisashi;Nagai Shin-ichiro;Shiraishi Kazuhiro;Ahmed Tarek;Eiji Hiraki;Mutsuo Nakaoka
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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    • pp.507-510
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    • 2003
  • This paper presents a novel prototype of tile three-phase bridge power block module type a auxiliary resonant AC link snubber circuit, which is effectively used for the three-phase voltage source type sinewave soft switching PWM inverter using IGBTs. Its operating principle Is described for current source load model, along with its practical design approach based on the simulation data. The performance evaluation of the three-phase voltage source type snewave soft switching PWM inverter incorporating a single three-phase bridge mo여le of active auxiliary resonant AC link snubber treated here Is illustrated, which is concerned with power duality efficiency power loss analysis. This inverter is discussed as compared with those of tile three-phase voltage source type sinewave hard switching PWM inverter. The power loss analysis of this soft switching PWM Inverter using IGBT power modules is evaluated on the basis of the measured v-i characteristics and switching power losses of IGBT, and antiparaliel diodes. The practical effectiveness of this inverter is proven by the power loss analysis for distributed power supply.

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선박 비상조명용 전원장치의 성능개선 (A Study on the Improvement of Performance of Power Supply for Ship's Emergency Lighting System)

  • 양현숙;이수헌;정태선;이성근;김윤식
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2004년도 전력전자학술대회 논문집(2)
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    • pp.822-825
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    • 2004
  • This paper describes the improvement of performance of power supply for ship's emergency lighting system(SELS). Proposed system is composed of power factor correction (PFC) circuit, emergency power supply system (EPSS), half bridge(HB) inverter, fluorescent lamp(FL) starting circuit and microprocessor control system. Experimental works using proposed system confirm that speedy and stable power to be supplied when main power source cut-off, compared with conventional relay type, and control power factor up to $97.5[\%]$ and input power up to $35.0[\%]$ by adjusting of pulse frequency of the HB inverter.

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전력전자의 요소기술 과 요소기술로서의 전력전자 (Elements of Power Electronics and Its Roles as the Key Technology)

  • 임근희
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.1067.1-1067.4
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    • 2000
  • During the last three decades power electronics has gone through energetic technical evolution. The technical needs from wide area such as in industrial, commercial, consumer, aerospace and environmental applications have driven the environment favorably for the power electronics. In the future, two extreme technology-expansion trends are expected: one into low power, and the other into very high power. The former is based on the high frequency and the circuit miniature using VLSI circuit and surface mounting aiming for the system-on-chip (SOC) technology. The latter includes the application areas of power utility such as HVDC, FACTS and SVC and large science area of electrophsycal apparatus such as thermonuclear fusion, acclerators, and electric guns. This paper describes the technology status of some major elements which are available today and the key roles of the power electronics from view points of applications. The author would like to take this opportunity to raise discussions about the future technology development trend of power electronics in our country with the fellow power electronics engineers.

Power Electronics as an Enabling Technology for Renewable Energy Integration

  • Blaabjerg, F.;Chen, Z.
    • Journal of Power Electronics
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    • 제3권2호
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    • pp.81-89
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    • 2003
  • The global electrical energy consumption is still rising and there is a steady demand to increase the power capacity, to produce, distribute and use the energy as0 efficient as possible and furthermore to set up incentives to save energy at the md-user. Two major technologies will play important roles to fulfill those targets. One is to change the electrical power production sources from the conventional, fossil (and short term) based energy sources to renewable energy resources. The other is to use high efficiency power electronics in power systems for high efficiency and high performance applications. This paper discusses both areas, in particular the power electronic application in wind power integration.

6.6 kW On-Vehicle Charger with a Hybrid Si IGBTs and SiC SBDs Based Booster Power Module

  • Han, Timothy Junghee;Preston, Jared;Ouwerkerk, David
    • Journal of Power Electronics
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    • 제13권4호
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    • pp.584-591
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    • 2013
  • In this paper, a hybrid booster power module with Si IGBT and Silicon Carbide (SiC) Schottky Barrier Diode (SBDs) is presented. The switching characteristics of the hybrid booster module are compared with commercial Silicon IGBT/Si PIN diode based modules. We applied the booster power module into a non-isolated on board vehicle charger with a simple buck-booster topology. The performances of the on-vehicle charger are analyzed and measured with different power modules. The test data is measured in the same system, at the same points of operation, using the conventional Si and hybrid Si/SiC power modules. The measured power conversion efficiency of the proposed on-vehicle charger is 96.4 % with the SiC SBD based hybrid booster module. The conversion efficiency gain of 1.4 % is realizable by replacing the Si-based booster module with the Si IGBT/SiC SBD hybrid boost module in the 6.6 kW on-vehicle chargers.

200W급 외장형 Adapter를 위한 최적 Topology 에 관한 연구 (A study on the optimal topology for external adapter in the 200 watt class)

  • 김준형;남원석;한상규;노정욱;홍성수;사공석진;김종선;유병우
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2006년도 전력전자학술대회 논문집
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    • pp.378-380
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    • 2006
  • Adapter는 그 특성상 밀폐된 환경 및 대전류 구동으로 인하여 회로 소자의 발열이 매우 심각하며 이를 위해서는 주어진 사양에서 최고의 효율을 갖는 최적Topology의 선정이 중요하다. 따라서, 본 논문에서는 기존에 제안된 바 있는 몇 가지 회로에 대한 이론적 및 실험적 검증을 통해 200W 급 외장형 Adapter를 위한 최적 Topology를 제시하며 아울러 출력 정류 다이오드의 도통손실 및 발열을 개선하기 위해 동기정류기에 대하여 고찰한다.

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Intergrated Magnetics를 이용한 LCD Backlight 인버터용 전류평형 트랜스포머 (A Resonant Transformer Structure with Current Balancing for LCD Backlight Inverter)

  • 이광일;이재광;권기현;노정욱;한상규;홍성수;사공석진;김종선
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2006년도 전력전자학술대회 논문집
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    • pp.242-244
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    • 2006
  • 본 논문은 LCD Backlight 인버터 구동 응용을 위한 다중 램프 점등 시 트랜스포머 소자 수 감소를 이를 수 있는 전류평형 트랜스포머의 구조 및 형상에 관한 것으로서, 제안된 트랜스포머 구조는 기존의 트랜스포머 구조 방식에 비해 소자 수가 줄어들어, LCD Backlight 인버터의 원가를 저감 할 수 있는 트랜스포머 구조 및 형상에 관한 것이다.

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PDP 구동 응용을 위한 저전압 스위칭 소자로 구성된 간단한 구조의 Multi-level 유지방전 회로 (Multi-level sustain Circuit of simple structure using low voltage switching device for PDP driving application)

  • 강순은;남원석;한상규;홍성수;사공석진;양학철;노정욱
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2006년도 전력전자학술대회 논문집
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    • pp.75-77
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    • 2006
  • 본 논문에서는 PDP 구동 응용을 위한 간단한 구조의 Multi-level 유지 방전 회로를 제안한다. 제안된 회로는 기존의 Multi-level 유지 방전 회로에 비해 적은 수의 스위칭 소자로 구현할 수 있어 간단한 구조를 가진다. 또한, 기존의 Multi-level 회로와 동일한 수준의 소자 전압 및 전류 스트레스를 가지므로, 저가의 고성능의 저전압 소자를 사용할 수 있어 PDP 구동 회로의 원가 저감과 고효율 동작을 이룰 수 있을 것으로 예상한다. 제안된 회로의 동작 원리를 설명하고, 42" HD급 PDP에 실제 적용 실험을 하여 제안된 회로의 우수성을 보인다.

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노이즈 소스 임피던스 추출 방식을 이용한 EMI 필터 설계 (Design of EMI Filter using the Extract of Noise Source Impedance)

  • 원도현;김희승;백미란;한상규;노정욱;원재선;오동성;홍성수
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2010년도 하계학술대회 논문집
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    • pp.462-463
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    • 2010
  • 기존의 EMI 필터 설계 방식은 많은 가정을 전제로 설계되어 다양한 종류의 컨버터에 적용하기 어렵고, 특정 컨버터에만 적용할 수 있는 문제점이 있다. 이를 해결하기 위해 본 논문에서는 측정 대상 시료의 노이즈 원과 노이즈 소스 임피던스를 등가회로로 모델링한 후 EMI 필터에 사용되는 소자의 임피던스 모델을 이용하여 노이즈 소스 임피던스를 유추한다. 이를 이용하여 모든 컨버터에 적용될 수 있는 EMI 필터 설계 방법을 제시한다. 최종적으로 각 단계에서 실제 측정 결과 및 모의실험 결과를 제시하여 제안 방식의 타당성 및 유용성을 검증하였다.

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