WL3型稳流电源

TYPE WL 3 CURRENT STABILIZED D. C POWER SUPPLY

摘要:

我国现行的地电阻率观测方法,采用的是中常大小极距的四极对称法。测量仪器多使用DDC-2A电子自动补偿仪。供电方式大致可分:1.整流供电,供电时将供电电流调到某一固定值上,测人工电位时,若电网电压,负载电阻发生变化,均会引起供电电流的变化,致使地电阻率观测误差大。

Abstract:

During recent years a number of current stabilized D. C power supplies have been designed for earth resisivity measurement in the research of earthquake prediction. Type WL3 current stabilizer is the newest of them to supply power of up to 2.5KW at 5A to non-inductive load.
The design and basic theory of WL3 current stabilizer are discussed by means of SCR for current control component, and the circuit of WL3 current stabilizer is described. Its current stability against load resistance variations or changes in three phase mains voltage is better than 1 per cent. With an initial load resistance of 100, the measured current stability at 5A is 0.9 per cent for 50 per cent reduction in load resistance and 0.8 per cent for 30 per cent change in mains voitage.
The question of critical inductance is also discussed.
It is suitable for geoelectric stations which have three phase mains in our country.