• 제목/요약/키워드: Snubber

검색결과 411건 처리시간 0.026초

A New Low Loss Snubber Circuit Suitable for Multilevel inverter and Converter

  • Kim, In-Dong;Nho, Eui-Cheol
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 1998년도 Proceedings ICPE 98 1998 International Conference on Power Electronics
    • /
    • pp.541-546
    • /
    • 1998
  • This paper proposes a new snubber circuit for multilevel inverter and converter. The snubber circuit makes use of Undeland snubber as basic snubber unit and can be regraded as a generalized Undeland snubber. The proposed snubber keeps such good features as fewer number of components, improved efficiency due to low loss snubber, capability of clamping overvoltage across main switching devices, and no unbalance problem of blocking voltage. Furthermore, the proposed concept of constructing a snubber circuit for multilevel inverter and converter can apply to any kind of basic snubber unit such as Holtz nondissipative snubber, McMurray efficient snubber, Lauritzen lossless snubber, etc which have been utilized for two-level inveter.

  • PDF

멀티레벨 인버터 및 컨버터를 위한 새로운 저손실 스너버 (A New Generalized Undeland Snubber Circuit for Multilevel Inverter and Converter)

  • 김인동;노의철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1998년도 하계학술대회 논문집 F
    • /
    • pp.1928-1930
    • /
    • 1998
  • This paper proposes a new snubber circuit for multilevel inverter and converter. The snubber circuit makes use of Undeland snubber as basic snubber unit and can be regarded as a generalized Undeland snubber. The proposed snubber keeps such good features as fewer number of components, improved efficiency due to low loss snubber, capability of clamping overvoltage across main switching devices, and no unbalance problem of blocking voltage. Furthermore, the proposed concept of constructing a snubber circuit for multilevel inverter and converter can apply to any kind of basic snubber unit such as Holtz nondissipative snubber, McMurray efficient snubber, Lauritzen lossless snubber, etc which have been utilized for two-level inverter.

  • PDF

플라잉 커패시터 멀티레벨 인버터 및 컨버터를 위한 스너버 회로 (A Snubber Circuit for Flying Capacitor Multilevel Inverter and Converter)

  • 성현제
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2000년도 전력전자학술대회 논문집
    • /
    • pp.448-451
    • /
    • 2000
  • This paper proposed a snubber circuit for flying capacitor multilevel inverter and converter. The proposed snubber circuit makes use of Undeland snubber as basic snubber as basic snubber unit and has such an advantage of Undeland snubber used in the two-level inverter. Comparing conventional RCD/RLD snubber for multilevel in verter and converter the proposed snubber keeps such a good features as fewer number of components improved efficiency of system due to low loss snubber and reduction of voltage stress of main switching devices due to low overvoltage. Furthermore the proposed concept of constructing a snubber circuit for flying capacitor 3-level inverter and converter can apply to any level of them. In this paper the proposed snubber applies to three-level flying capacitor inverter and demonstrates its feature by computer simulation and experimental result.

  • PDF

4-레벨 인버터 및 컨버터를 위한 새로운 스너버회로 (A New Snubber Circuit for Four-Level Inverter and Converter)

  • 김인동;노의철
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
    • /
    • 제49권9호
    • /
    • pp.598-606
    • /
    • 2000
  • This paper proposes a new snubber circuit for 4-level inverter and converter. The snubber circuit makes use of Undeland snubber and McMurray efficient snubber as basic snubber unit and can be regarded as a generalized combined Undeland and McMurray efficient snubber. The proposed snubber keeps such good features as fewer number of components improved efficiency due to low snubber loss capability of clamping overvoltage across main switching devices and no unbalance problem of blocking voltage. Furthermore the proposed concept of constructing a snubber circuit for 4-level inverter and converter can apply to any level of converterand inverter.

  • PDF

플라잉 커패시터 멀티레벨 인버터 및 컨버터를 위한 스너버 회로 (A Snubber Circuit for Flying Capacitor Multilevel Inverter and Converter)

  • 이민수;성현제;김인동;노의철;조철제
    • 대한전기학회논문지:전기기기및에너지변환시스템부문B
    • /
    • 제50권9호
    • /
    • pp.459-466
    • /
    • 2001
  • This paper proposes a snubber circuit for flying capacitor multilevel inverter and converter. The proposed snubber circuit makes use of Undeland snubber as basic snubber unit. It has such an advantage of Undeland snubber used in the two-level inverter. Compared with conventional RCD/RLD snubber for multileve1 inverter and converter, the proposed snubber keeps such good features as fewer number of components, reduction of voltage stress of main switching devices due to low overvoltage, and improved efficiency of system due to low loss snubber. In this paper, the proposed snubber is applied to three-level flying capacitor inverter and this feature is demonstrated by computer simulation and experimental result.

  • PDF

스너버(Snubber) 회로 분석을 통한 회로의 최적설계 (Optimal Circuit Design through Snubber Circuit Analysis)

  • 윤용호
    • 한국인터넷방송통신학회논문지
    • /
    • 제23권4호
    • /
    • pp.137-142
    • /
    • 2023
  • SMPS(Switched Mode Power Supply, 전력공급장치) 회로설계 시 특별한 고찰 없이 지나치기 쉬운 부분이 스너버(snubber) 회로이다. 그러나 스너버(snubber) 회로에 따른 SMPS의 성능저하 및 SET 전체에 미치는 영향은 결코 무시할 수 없다. 또한 스위칭시 피크치 전압과 전류로부터 소자를 보호하고 on/off 스위칭시 손실을 줄여주기 위하여 스위치 양단에 스너버(snubber) 회로를 부가해준다. 따라서 본 논문에서는 스너버(snubber) 회로에 대한 충분한 이해를 위해 이론적 해석 및 실제 회로설계 때 설계자가 응용할 수 있는 실험식을 정리하여, 스너버(snubber) 회로의 최적화를 도모하고자 한다.

A Simple Undeland Snubber Circuit for Flying Capacitor 3-level Inverter

  • Kim In-Dong;Nho Eui-Cheol;Lee Min-Soo
    • 전력전자학회:학술대회논문집
    • /
    • 전력전자학회 2001년도 Proceedings ICPE 01 2001 International Conference on Power Electronics
    • /
    • pp.281-285
    • /
    • 2001
  • This paper proposes a snubber circuit for flying capacitor multilevel inverter and converter. The proposed snubber circuit makes use of Undeland snubber as basic snubber unit. It has such an advantage of Undeland snubber used in the two-level inverter. Compared with conventional RLD/RCD snubber for multilevel inverter and converter, the proposed snubber keeps such good features as fewer number of components, reduction of voltage stress of main switching devices due to low overvoltage, and improved efficiency of system due to low snubber loss. In this paper. the proposed snubber is applied to three-level flying capacitor inverter and its feature is demonstrated by computer simulation and experimental result.

  • PDF

환원분철을 이용한 마찰식 완충기 개발 (Friction Snubber Development Using Sponge Iron)

  • 김병삼
    • 한국소음진동공학회논문집
    • /
    • 제14권10호
    • /
    • pp.1021-1028
    • /
    • 2004
  • Developed friction snubbers changes the shock or vibration into a heat energy by mechanical friction. Snubber is divided into friction snubbers and hydraulic snubbers according to the operation types. However, hydraulic snubber has a lot of problems caused by temperature, humidity, radioactivity, and viscosity of hydraulic fluid. In these respects, to solve these problems, not only do friction snubber supplement lacks of hydraulic snubber but has also simpler structure than hydraulic snubber. In this paper, friction snubber used sponge iron by friction material is experimentally compared with general friction snubber In this results, the experiment verifies friction function and produce the manufacture condition for the effective friction snubber development.

A High Efficiency DC-DC Boost Converter with Passive Regenerative Snubber

  • Radika, P.
    • Journal of Electrical Engineering and Technology
    • /
    • 제9권2호
    • /
    • pp.501-507
    • /
    • 2014
  • This paper describes the improvement in converter efficiency by reducing the switching loss and by recovering the snubber stored energy. A capacitive based passive regenerative snubber circuit is modeled for a dc-dc boost converter. The proposed snubber is mainly used to reduce the turn-off loss of the main switch. The energy recovery process and the turn-off loss depends on the size of the snubber capacitance; therefore, the conventional and the proposed converters are designed for high and low input voltage conditions with different sizes of the snubber capacitance. Based on the results obtained, the snubber capacitors are classified as small, normal and large snubbers. The Matlab simulation results obtained are presented.

PWM Cuk AC-AC 컨버터를 위한 Undeland 스너버 (Undeland Snubber for PWM Cuk AC-AC Converter)

  • 최남섭;김인동;노의철
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 2006년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
    • /
    • pp.275-277
    • /
    • 2006
  • This paper proposes a snubber circuit for a PWM Cuk AC-AC converter. The proposed snubber makes use of an Undeland snubber as a commutation aids. So the snubber keeps such good features as small count of snubber elements, reduction of voltage/current stress of main switching devices and improved efficiency. This paper shows simulation results to verify the adaptability and feasibility of the proposed snubber.

  • PDF