• 제목/요약/키워드: Transformer Design

검색결과 895건 처리시간 0.031초

다(多)출력 DC-DC 플라이백 컨버터용 변압기 설계방법 및 개발 (The Design and Development of Flyback Transformer for Multi - Out Flyback DC-DC Converter)

  • 박종연;강도형
    • 산업기술연구
    • /
    • 제20권B호
    • /
    • pp.163-168
    • /
    • 2000
  • This paper gives a fundamental study of the design method of Flyback Transformer(FBT) in the Multioutput Flyback DC-DC Converter. We explained a winding strategy and Core selecting of the Flyback transformer to get the design guidelines for optimizing the performance of Flyback DC-DC Converter. The final goal of this paper is to obtain design rules of the Flyback transformer to minimize the leakage inductance for good quality of DC Souce.

  • PDF

식물성절연유를 사용한 친환경 주상변압기 설계를 위한 절연파괴 특성 (Breakdown Properties for Insulation Design of the Environment-Friendly Pole Transformer using the Vegetable Insulating Oil)

  • 곽동순
    • 한국안전학회지
    • /
    • 제26권6호
    • /
    • pp.7-12
    • /
    • 2011
  • In recent years, environmental concerns have been raised on the use of poorly biodegradable fluids in electrical apparatus in regions where spills from leaks and equipment failure could contaminate the surroundings. The newly invented vegetable insulating oil is highly biodegradable and have negligible impact on the environment, human health and the ecosystem. For development of the environmental-friendly pole transformer using vegetable insulating oil, the dielectric constructions of the pole transformer were discussed in this paper. Depending on the dielectric constructions, the AC breakdown characteristics of the Nomex insulating papers and the vegetable insulating oil were studied by simulated electrode systems. Based on the experimental results, the maximum design stress($E_{max}$) for insulation design of the environmental-friendly pole transformer were suggested.

대전류 출력형 Flat Transformer 설계 및 해석 기술 (Design and Simulation Technologies of Flat Transformer with High Power Current)

  • 한세원;조한구;우병철
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2002년도 춘계학술대회 논문집 유기절연재료 전자세라믹 방전플라즈마 일렉트렛트 및 응용기술
    • /
    • pp.15-17
    • /
    • 2002
  • Leakage inductance and temperature rise are two of the more impotent problems facing the magnetic core technology of today's high frequency transformers. Excessive leakage inductance increases the stress on the switching transistors and limits the duty-cycle, and excessive temperature rise can lead the design limitation of high frequency transformer with high current. The flat transformer technology provides a very good solution to the problems of leakage inductance and thermal management for high frequency power. The critical magnetic components and windings are optimized and packaged within a completely assembled module. The turns ratio in a flat transformer is determined as the product of the number of elements or modules times the number of primary turns. The leakage inductance increase proportionately to the number of elements, but since it is reduced as the square of the turns, the net reduction can be very significant. The flat transformer modules use cores which have no gap. This eliminates fringing fluxes and stray flux outside of the core. The secondary windings are formed of flat metal and are bonded to the inside surface of the core. The secondary winding thus surrounds the primary winding, so nearly all of the flux is captured.

  • PDF

고온초전도 변압기 및 부싱의 절연설계 (The Insulation Design of HTS Transformer and Bushing)

  • 천현권;최재형;방만식;김상현
    • 한국초전도ㆍ저온공학회논문지
    • /
    • 제12권3호
    • /
    • pp.12-15
    • /
    • 2010
  • Important key technologies of high-$T_c$ superconducting (HTS) transformer may include the HTS wire technology, bushing technology, cooling technology, AC loss, reduction technology, large current technology, and cryogenic temperature insulation technology. From among others, the cryogenic temperature insulation technology may be specifically a core technology for ensuring reliability for the smaller size, stability, economic efficiency, and power supply of a transformer. Therefore, the electric insulation technology of a superconducting transformer should be prerequisite. Such relevant studies are ongoing, but still, they are very insufficient for establishing the cryogenic insulation technology as of yet. Therefore, this paper simulated HTS transformer applied with continuous transposed conductor (CTC), which has been studied as a way of reducing AC loss. Also, the paper analyzed the insulation configuration of HTS transformer and bushing, and, accordingly, reviewed various characteristics of insulation breakdown out of liquid nitrogen. Thus, the paper constituted insulation database, and it is going to design the insulation of a transmission class HTS transformer and bushing.

토로이드형 변압기의 일관성있는 설계법과 그 최적화 알고리즘 (Unified Design Method for Toroidal Transformer and its Optimal Algorithm)

  • 김주홍;이광직
    • 한국조명전기설비학회지:조명전기설비
    • /
    • 제5권3호
    • /
    • pp.78-83
    • /
    • 1991
  • This study proposes a unified method to design toroidal transformer and its optimal design algorithm. This unified design method was derived from the fundamental equation of power on the basis of electromagnetic energy of a core and the definition of three parameters(K1, K2, KW) that influence the form of a core and the ratio of a core and coil. Accordingly this design method condenses the whole data for design of toroidal transformer to a standard variable which is the inner diameter of a core. The minimal cost, weight and volume values of the transformer were computed by means of the algorithm to search the optimal values of the parameters. Furthermore, through the CAD, the efficiency of this unified design method and optimal algorithm proposed in this paper was confirmed.

  • PDF

Conceptual Design of an HTS large power transformer with continuously transposed coated conductors

  • Lee, Se-Yeon;Park, Sang-Ho;Kim, Woo-Seok;Lee, Ji-Kwang;Park, Il-Han;Chol, Kyeong-Dal;Hahn, Song-Yop
    • 한국초전도ㆍ저온공학회논문지
    • /
    • 제13권2호
    • /
    • pp.5-8
    • /
    • 2011
  • This paper shows results of a design work of a program that is to develop a large power single phase high temperature superconducting (HTS) transformer. The program forms a part of a national project in Korea. A target of the design work is an HTS power transformer with rated voltages of 154 kV/22.9 kV and material for windings is supposed to be coated conductor. The design results presents in this paper will include: 1)HTS winding structures for high voltage in liquid nitrogen, 2)design result of continuously transposed coated conductor (CTCC), 3)conceptual design of high voltage bushings, 4)cooling system. A feasibility study will succeed to this design work for construction of a prototype HTS power transformer with capacity/voltage of 33 MVA/154 kV.

광대역 다단 전력 분배기의 일반화된 설계 방법 (A General Design Method for the Broadband Multi-Section Power Divider)

  • 박준석;김형석;임재봉
    • 대한전기학회논문지:전기물성ㆍ응용부문C
    • /
    • 제51권2호
    • /
    • pp.85-91
    • /
    • 2002
  • A novel multi-section power divider configuration is Proposed to obtain wide-band frequency performance up to microwave frequency region. Design procedures for the proposed microwave broadband power divider are composed of a Planar multi-section three-Ports hybrid and a waveguide transformer design procedures. The multi∼section power divider is based on design theory of the optimum quarter- wave transformer Furthermore, in order to obtain the broadband isolation performance between the two adjacent output ports, the odd mode equivalent circuit should be matched by using the lossy element such as resistor. The derived design formula for calculating these odd mode∼matching elements is based on the singly terminated filter design theory. The waveguide transformer section is designed to suppress the propagation of the higher order modes such as waveguide modes due to employing the metallic electric wall. Simulation and experiment show excellent performance of multi section power divider.

Design Considerations of Resonant Network and Transformer Magnetics for High Frequency LLC Resonant Converter

  • Park, Hwa-Pyeong;Ryu, Younggon;Han, Ki Jin;Jung, Jee-Hoon
    • Journal of Electrical Engineering and Technology
    • /
    • 제11권2호
    • /
    • pp.383-392
    • /
    • 2016
  • This paper proposes the design considerations of resonant network and transformer magnetics for 500 kHz high switching frequency LLC resonant converter. The high power density can be effectively achieved by adopting high switching frequency which allows small size passive components in the converter. The design methodology of magnetizing inductance is derived for zero voltage switching (ZVS) condition, and the design methodology of the transformer and output capacitance is derived to achieve high power density at high operating frequency. Moreover, the structure of transformer is analyzed to obtain the proper inductance value for high switching operation. To verify the proposed design methodology, simulation and experimental results will be presented including temperature of passive and active components, and power conversion efficiency to evaluate dominant power loss. In addition, the validity of magnetics design will be evaluated with operating waveforms of the prototype converter.

Balance Winding Scheme to Reduce Common-Mode Noise in Flyback Transformers

  • Fu, Kaining;Chen, Wei
    • Journal of Power Electronics
    • /
    • 제19권1호
    • /
    • pp.296-306
    • /
    • 2019
  • The flyback topology is being widely used in power adapters. The coupling capacitance between primary and secondary windings of a flyback transformer is the main path for common-mode (CM) noise conduction. A Y-cap is usually used to effectively suppress EMI noise. However, this results in problems in space, cost, and the danger of safety leakage current. In this paper, the CM noise behaviors due to the electric field coupling of the transformer windings in a flyback adapter with synchronous rectification are analyzed. Then a scheme with balance winding is proposed to reduce the CM noise with a transformer winding design that eliminates the Y-cap. The planar transformer has advantages in terms of its low profile, good heat dissipation and good stray parameter consistency. Based on the proposed scheme, with the help of a full-wave simulation tool, the key parameter influences of the transformer PCB winding design on CM noise are further analyzed. Finally, a PCB transformer for an 18W adapter is designed and tested to verify the effectiveness of the balance winding scheme.

트랜스포머의 자가공진 특성을 이용한 고전압 트랜스포머 설계 (High Voltage Transformer Design using Self-Resonant Characteristics of Transformer)

  • 이승환;조대권
    • 전기전자학회논문지
    • /
    • 제18권1호
    • /
    • pp.31-36
    • /
    • 2014
  • 본 논문에서는 트랜스포머의 자가공진 특성에 대하여 분석하였으며, 부유용량과 권선량, 권선비에 따른 변화관계를 수식으로 정리하였다. 일반적으로 트랜스포머에서의 부유용량은 제작과 관련하여 불요인자로 간주되나, 모든 트랜스포머에서 내재하는 특성을 갖는다. 특히 고역의 구동 주파수에서는 해당 특성이 확연하게 나타남은 주지의 사실이며, 자기적 요소와 결합하여 특정주파수에서 공진형상을 유발한다. 출력이득 값이 높아야 하는 소형 고전압기기, 특히 의료용 응용전기기의 경우 트랜스포머의 자가공진 특성을 이용하면 트랜스포머 및 회로의 사이즈를 줄임과 동시에 시스템의 경량화가 가능하여 추가적 설계 기법으로 제안한다.