• Title, Summary, Keyword: Switching Function etc

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Switching Function using Edge-Valued Decision Diagram

  • Park, Chun-Myoung
    • Journal of information and communication convergence engineering
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    • v.9 no.3
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    • pp.276-281
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    • 2011
  • This paper presents a method of constructing the switching function using edge-valued decision diagrams. The proposed method is as following. The edge-valued decision diagram is a new data structure type of decision diagram which is recently used in constructing the digital logic systems based on the graph theory. Next, we apply edge-valued decision diagram to function minimization of digital logic systems. The proposed method has the visible, schematic and regular properties.

Switching Function Implementation based on Graph (그래프에 기초한 스위칭함수 구현)

  • Park, Chun-Myoung
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.15 no.9
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    • pp.1965-1970
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    • 2011
  • This paper proposes the method of switching function implementation using switching function extraction based on graph over finite fields. After we deduce the matrix equation from path number of directional graph, we propose the switching function circuit algorithm, also we propose the code assignment algorithm for nodes which is satisfied the directional graph characteristics with designed circuits. We can implement more optimal switching function compare with former algorithm, also we can design the switching function circuit which have any natural number path through the proposed switching function circuit implementation algorithms. Also the proposed switching function implementation using graph theory over finite fields have decrement number of input-output, circuit construction simplification, increment arithmetic speed and decrement cost etc.

A Construction of the Switching Function by IATP (자동정리증명기법에 의한 스위칭함수 구성)

  • Park, Chun-Myoung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.766-767
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    • 2015
  • This paper propose the method of constructing the switching function based on the IATPT. The proposed method have advantage which is the efficiency, regularity and extensibility and so on compare with earlier methods. We expect the proposed the method be able to contribute the constructing the any digital logic systems.

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The Dimmable Single-stage Asymmetrical LLC Resonant LED Driver with Low Voltage Stress Across Switching Devices

  • Kim, Seong-Ju;Kim, Young-Seok;Kim, Choon-Taek;Lee, Joon-Min;La, Jae-Du
    • Journal of Electrical Engineering and Technology
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    • v.10 no.5
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    • pp.2031-2039
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    • 2015
  • In the LED lighting industry, the dimming function in the LED lamp is required by demands of many consumers. To drive this LED lighting, various types of power converters have been applied. Among them, an LLC resonant converter could be applied for high power LED lighting because of its high efficiency and high power density, etc. The function of power factor correction (PFC) might be added to it. In this paper, a dimmable single-stage asymmetrical LLC resonant converter is proposed. The proposed converter performs both input-current harmonics reduction and PFC using the discontinuous conduction mode (DCM). Also, the lower voltage stress across switching devices as well as the zero voltage switching (ZVS) in switching devices is realized by the proposed topology. It can reduce cost and has high efficiency of the driver. In addition, the regulation of the output power by variable switching frequency can vary the brightness of a light. In the proposed converter, one of the attractive advantages doesn’t need any extra control circuits for the dimming function. To verify the performance of the proposed converter, simulation and experimental results from a 300W prototype are provided.

A Constructing the Efficiency Multiple Output Switching Function of the Combinational Logic Systems (조합논리시스템의 효율적인 다중출력스위칭함수 구성)

  • Park, Chun-Myoung
    • Journal of the Institute of Electronics and Information Engineers
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    • v.54 no.1
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    • pp.41-45
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    • 2017
  • This paper presents a method of constructing the efficiency multiple output switching function of the combinational logic systems. The proposed method reduce the optimized input variable pair and output variable pair after we obtained the final multiple output switching function which was time based multiplexing and obtained the common multiple end node extension logic decision diagram. Also the proposed method have an advantage of the cost, input-output node number, circuit simplification, increment of the arithmetic speed, and more regularity and extensibility compare with previous method.

A Study on Constructing the High Efficiency Switching Function based on the Modular Techniques (모듈러 기술에 기반을 둔 고효율 스위칭함수 구성에 관한 연구)

  • Park, Chun-Myoung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.398-399
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    • 2019
  • This paper presents a method of the circuit design of the multiple-valued digital logic switching functions based on the modular techniques. Fisr of all, we introduce the necessity, background and concepts of the modular design techniques for the digital logic systems. Next, we discuss the definitions that are used in this paper. For the purpose of the circuit design for the multiple-valued digital logic switching functions, we discuss the extraction of the partition functions. Also we describe the construction method of the building block, that is called the modules, based on each partition functions. And we apply the proposed method to the example, we compare the results with the results of the earlier methods. In result, we decrease the control functions, it means that we obtain the effective cost in the digital logic design for any other earlier methods. In the future research, we require the universal module that traet more partition functions and more compact module.

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A Study on Constructing the Digital Logic Switching Function using Partition Techniques (분할기법을 이용한 디지털논리스위칭함수구성에 관한 연구)

  • Park Chun-Myoung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.721-724
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    • 2006
  • This paper presents a method of the constructing the digital logic switching functions and realizing the circuit design using partition techniques. First of all, we introduce the necessity, background and concepts of the partition design techniques for the digital logic systems. Next, we discuss the definitions that are used in this paper. For the purpose of the circuit design for the digital logic switching functions, we discuss the extraction of the partition functions. Also we describe the construction method of the building block, that is called the building block, based on each partition functions. And we apply the proposed method to the example, and we compare the results with the results of the earlier methods. In result, we describe the control functions, it means that we obtain the effective cost in the digital logic design for any other earlier methods.

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A Study on the Novel Time Sharing Type Current Fad High Frequency Resonant Inverter (새로운 시분할 방식 전류형 고주파 인버터에 관한 연구)

  • Kim H.J.;Won J.S.;Kang J.W.;Cho G.P.;Oh S.H.;Min B.J.;Jung D.Y.
    • Proceedings of the KIPE Conference
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    • pp.27-30
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    • 2003
  • This paper describes two novel current fed high frequency resonant inverter can be used as the power supp]y for wax-sealing. This two topology can be obtained higher output frequency than switching frequency by composing modified unit inverter based on conventional half-bridge serial resonant inverter in parallel with input power source. also, By using time-sharing gate control method, this proposed inverter can not only realize the output control of dependence irrespective of the switching frequency using phase-shift but also reduce switching loss because it has ZVS function. Simulation results through the Pspice have demonstrated the feasibility of the proposed inverter. This proposed inverter 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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A study of excitation system of 500MVA short-circuit facilities (500MVA 단락발전기 여자시스템 특성 개선에 관한 고찰)

  • Jung, Heung-Soo;La, Dae-Ryeol;Kim, Sun-Koo;Roh, Chang-Il;Kim, Won-Man;Lee, Dong-Jun;Kim, Sun-Ho
    • Proceedings of the KIEE Conference
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    • pp.685-686
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    • 2006
  • The excitation system of 500MVA short-circuit generator is very important because of operation of various condition, for example, (over) load switching, short-time current, short-circuit current, etc. This paper introduces a feature of excitation system of 500MVA short-circuit facilities and the function and construction of each part.

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A study of excitation system of 500MVA short-circuit generator (500MVA급 단락발전기 여자시스템의 특성개선)

  • Jung, Heung-Soo;Kim, Sun-Koo;Roh, Chang-Il;Kim, Won-Man;Lee, Dong-Jun;Kim, Sun-Ho
    • Proceedings of the KIEE Conference
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    • pp.989-990
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    • 2007
  • The excitation system of 500 MVA short-circuit generator is very important because of operation of various condition, for example, (over) load switching, short-time withstand current, short-circuit making and breaking current, etc. This paper introduces a feature of excitation system of 500MVA short-circuit generator and the function and construction.

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