摘要:
带电感性直流负载的扼流磁放大器,是磁放大器中最基本的典型线路之一,其静、动态特性的非线性非常突出,给理论分析带来很大困难. 在实测波形分析的基础上,本文严谨地推导得一组新的公式,这些公式表明:带电感性直流负载扼流磁放大器的静态特性,与电路的阻值比(rx/ry和RL/ry)密切相关,而其传递函数的形式则为 Y(s)=(1+7as)/(1+T1s+T22S2). 这些结果与本文所引述的各文献[1-8,11]对同一问题的公式是不同的.大量实验证明:本文推导得的这些公式是正确的,与实验数据符合得很好,具有很大的通用性,并解释了一些过去所难以解释的“不正常”现象.
Abstract:
The saturable reactor with an inductive d.c. load is one of the most basic circuits of magnetic amplifiers. The non-linearities involved in its operation are very peculiar, and thus bring great difficulties to any attempt on its theoretical analysis.On the basis of the actual current-wave forms, a new set of formulas for the static and dynamic characteristics of the circuit is rigorously derived in this paper. It is shown that the static characteristic of a S. R. with a d.c. inductive load is sensitive particularly to the variations of the resistance ratios, rx/ry and RL/ry and that the transfer function of the circuit is of the form: Y(s)=(1+Tas)/(1+T1s+T2s2)Experiments indicate that the formulas derived in this paper are correct and easy to use. They agree very satisfactorily with the experimental data and are valid for most cases. Many anomalies, which could hardly be explained before in the operation of the circuit, are found now to be not peculiar at all.
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