生物利用におけるマイクロ波加熱出力のコントロール

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  • MORI Toshiko
    Department of Prosthetic Dentistry, Faculty of Dentistry, The University of Sydney
  • THOMAS Graham
    Department of Prosthetic Dentistry, Faculty of Dentistry, The University of Sydney
  • MARKHAM Robert
    Department of Obstetrics and Gynaecology, Faculty of Medicine, The University of Sydney
  • WHITE Paul
    Industrial Microwave Applications (Aust) Pty, Ltd.

書誌事項

タイトル別名
  • Improved Power Control during Microwave Heating in Biological Applications

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抄録

The heating performance of prototype variable power control units attached to two domestic microwave ovens, 500W and 700W, was investigated. The units employed the phase control method where rated voltage was obtained by switching AC supply at a particular angular position on the sinusoidal voltage. In order to create experimental conditions employed in a previous study, Sydney tap water (50mL) was heated at a 10% power level in the 500W oven. Water boiled at 10min in both experiments. However, the precision and control of the heating was greatly improved with addition of the control unit. A disinfecting solution (50mL) and a tissue fixative (10mL) were included for experiments with the 700W oven. A power level of only 1% was sufficient to maintain the temperature of the fixative at low temperatures (30-40°C) where many biological reactions occur. The present results indicate that microwave heating power can be controlled by the variable power control method. This will make temperature control possible through the provision of an electronic feedback loop which links a thermocouple with the power control unit.

収録刊行物

  • Dental Materials Journal

    Dental Materials Journal 11 (2), 197-203,219, 1992

    一般社団法人　日本歯科理工学会

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