山形大学紀要(工学) 第11巻 第1号(1970)269-286

電磁度数計の動作特性改善に関する一考察

尾山 茂・近野 正




Improvement of Dynamic characteristics in
Electromagnetic Counter

Shigeru OYAMA and Masashi KONNO

When an electromagnetic relay is set into operation, the coil current of the relay does not vary exponentially with time but "a downward point" in the growth of the current is observed. This phenomena is also observed in a dynamic operation of the counter using an electromagnetic relay, and hinders its fast dynamic operation.
It is the purpose of this study to give a guiding principle of design for improvements of dynamic characteristics of the counter, that is, a low dissipation power and a high speed operation, etc.
In the paper, a speed-up of operation is considered and the operating characteristics of the counter are discussed in detail. A method of measurement of the operation characteristic is also presented.
The value of inductance of the counter varies largely by the air gap between armature and pole-piece, or by the value of coil current. Therefore, the relations of the inductance to the air gap length and the coil current are investigated. The transient responce of R-L circuit with the variabie inductance under the condition of the armature fixed is calculated, and is compared with the experimental results.



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