【摘要】 详尽地分析了地电阻率观测系统的供电电源的发展过程 .对几种电源的技术指标和性能作出了评价 .在对几种电源的若干技术问题进行了分析和讨论后 ,指出对地电阻率观测系统的稳流电源的设计应采用高频开关电源技术 .介绍了作者设计的主电路图更多还原

【Abstract】 A detailed analysis on development process of regulated current supplies in earth resistivity measuring system is made. Technical indices and function of 2A,WL 5 and WL 5N regulated current supplies are evaluated.Detailed analysis and discussion on some technical problems in further development of the supplies are made. It is believed that the technique of high frequency switching supply ought to be applied in design of regulated current supply for measurement of earth resistivity. A main circuit of high frequency switching regulated current supply is given.更多还原