• Title/Summary/Keyword: Electromagnetic Transformer(EMT)

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A Study on Properties of Piezoelectric Ceramic Transformers (압전 세라믹 변압기 특성에 관한 연구)

  • Cho, Hyun-Seob;Ryu, In-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.10
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    • pp.2660-2664
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    • 2009
  • In this paper, it is reviewed is to acquaint a circuit design with features of piezoelectric ceramic transformers(PT) and to show the general approach to the design of inverters utilizing PT as a circuit element. The description of the piezoelectric effect is not present here and can be easily found in numerous publications as well as complex equations and formulae. What is the most important to understand is that "they are different" -one cannot just change an electromagnetic transformer (EMT) for a piezoelectric one. Several examples of PT-based circuitry will help to start and use PT's advantages most effectively.

A Study on the Electrical Properties of Highly Efficient Ceramic Piezoelectric Transformer (고효율 세라믹 압전 변압기의 전기적 특성에 관한 연구)

  • Cho, Hyun-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.4
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    • pp.1229-1232
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    • 2010
  • In this study, in order to develop multilayer piezoelectric transformer for high electromechanical coupling factor and mechanical quality factor. and to show the general approach to the design of inverters utilizing PT as a circuit element. The description of the piezoelectric effect is not present here and can be easily found in numerous publications as well as complex equations and formulae. What is the most important to understand is that "they are different" -one cannot just change an electromagnetic transformer (EMT) for a piezoelectric one. Several examples of PT-based circuitry will help to start and use multilayer piezoelectric transformer advantages most effectively.

Design of the inverter for driving CCFL (냉음극 방전 램프 구동용 인버터 설계)

  • Jun, Ho-Ik;Cho, Hyun-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.4
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    • pp.2320-2323
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    • 2014
  • Piezoelectric inverter for driving CCFL is designed in this study. Of them, CCFL is generally used because it has advantages such as small size, high efficiency and good brightness characteristics. the description of the piezoelectric effect is not present here and can be easily found in numerous publications as well as complex equations and formulae. What is the most important to understand is that "they are different" one cannot just change an electromagnetic transformer(EMT) for a piezoelectric one. The simulation program supports the modeled piezoelectric inverter for this paper and the equivalent circuit. The result of the experiment shows more than 90% improvement in terms of the efficiency.

Repetitive Tracking Control of a High-Voltage Piezoelectric Actuator (고압 압전 구동기의 반복 추종 제어)

  • Cho, Hyun-Seob
    • Proceedings of the KAIS Fall Conference
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    • 2008.05a
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    • pp.173-176
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    • 2008
  • The aim of this review is to acquaint a circuit designer with features of piezoelectric ceramic transformers(PT) and to show the general approach to the design of inverters utilizing PT as a circuit element. The description of the piezoelectric effect is not present here and can be easily found in numerous publications as well as complex equations and formulae. What is the most important to understand is that "they are different" - one cannot just change an electromagnetic transformer (EMT) for a piezoelectric one. Several examples of PT-based circuitry will help to start and use PT's advantages most effectively.

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