燃料油処理用ハイパワ超音波励振源の一方式について

概要

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Recently, some kinds of high-frequency inverters using reverse-conducting thyristors have been attractively used as the exciting sources for ultrasonic transducer systems. Both of voltage and current-fed inverters have been widely used for these purpose. In general, there are some problems in starting and high di/dt for the current-fed type inverters, and also in high dv/dt for the voltage-fed type inverters. Furthermore the maximum frequency of these inverters are limited by turn-off time rating. This paper describes some transient and steady-state characteristics of a center-tapped highfrequency inverter using ASCR, which is capable of operating at 100 KHz. First of all, the basic operation of the inverter is discussed and then the normalized numerical solution is elucidated. Effects of inductance ratio and capacitance ratio on the steady-state characteristics for the inverter are fully discussed on the basis of numerical analysis. Secondly, load characteristics attributed to load variations on the steady-state operation are illustrated in relation to some normalized circuit constants and operating frequency. In addition, the transient response of margin time of commutation for ASCR is studied in relation to the practical maximum operating frequency.
社団法人日本マリンエンジニアリング学会の論文