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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/8649


    Title: 具順向/返馳混合式轉換器之高脈衝電場產生器應用於流動液體食物抑菌
    Narrow Pulsed Electric Field Generator Using Forword / Flyback Hybrid Converters for Flowing Liquid Food Sterilization
    Authors: 張永東(Y.-D. Chang)
    林煌洲(H. -C. Lin)
    曾聖有(S.-Y. Tseng)
    吳財福(T.-F. Wu)
    楊宏仁(H.-R. Yang)
    Keywords: 高壓脈衝電場產生器
    順向/返馳混合式轉換器
    流動液體食物抑菌
    high pulsed electric-field generator
    liquid food treatment system
    forward/flyback hybrid converter
    Date: 2008-09-05
    Issue Date: 2010-02-25 11:40:24 (UTC+8)
    Abstract: 本文提出一高脈衝電場產生器應用於流動液體食物抑
    菌,所提之高脈衝電場產生器採用順向/返馳混合式轉換器,
    可達到雙極性窄脈衝輸出電壓。使用此電路架構,可以降低
    輸出側二極體及開關的耐壓,來降低元件成本,而且也可降
    低在開關轉態時元件的電壓變化率,以降低雜訊干擾。此外,
    所提轉換器結合主動箝制電路來回收高昇壓比變壓器漏感能
    量,同時也採用半橋換流器來驅動壓電陶磁片,以清潔抑菌
    電極的污垢。為了簡化所提電路架構,本文採用同步開關整
    合技術將主動箝制電路及半橋換流器之開關做整合,以提高
    電路系統的效率,同時可降低體積、大小及重量,並且也可
    降低成本。最後,以一組輸出最大電壓30 kV 及重複周期12
    Hz 之雛型機,來驗證高脈衝電場產生器之可行性。
    This paper presents a high pulsed electric field generator for
    microbial inhibition of flowing liquid food in continuous
    treatment applications. The proposed pulsed electric field
    generator adopts forward/flyback hybrid converter to generate a
    bipolar narrow pulse output voltages. With this circuit structure,
    the proposed one can reduce voltage stresses of output diodes
    and switches, resulting in lower cost. It can also reduce voltage
    slew rate of the switching components at turn-on and turn-off
    transitions to avoid noise interference. Additionally, the proposed
    generator uses an active clamp circuit to recover the energy
    trapped in the leakage inductance of the transformer with high
    turns ratio. Moreover, a half-bridge inverter is adopted to drive
    piezoelectric devices for clearing the inhibiting electrodes. To
    simplify circuit structure of the proposed system, a synchronous
    switch technique is used to integrate the switches in the active
    clamp circuit and half-bridge inverter to increase conversion
    efficiency and reduce volume, size, weight and cost. Finally, a
    prototype with maximum output voltage of 30 kV and repetition
    rate of 12 Hz has been implemented to prove the feasibility of
    the proposed pulsed electric field generator.
    Relation: 台灣電子電力研討會暨展覽會
    Appears in Collections:[電機工程系所 ] 2008第七屆台灣電力電子研討會暨展覽會

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