一种新型阴极保护恒电位仪的研制

Developing to A New Type Constant Potentiometer for Cathode Protection

恒电位仪是阴极保护工程所用的一种主要设备。本质上，阴极保护恒电位仪是一台能根据现场参比电位自动调整其输出电压与电流的大小，使参比电位为恒定的直流电源。该但电位仪具有结构简单、效率高、性能价格比优良等特点，并易于实现模块化；而且在工作原理上具有使电路中的开关器件在零电流状态下关断的特点，因而具有很好的发展前景。制成的样机当输入电压为３００Ｖ时，输出电压在０～２７０Ｖ之间可连续自动调整。与同类产品相比，重量减轻５０％，体积减少４０％，输出纹波电压减小９０％，而成本可降低１０％，效率可提高１０％。

The potentiometer is made with the new principle of large power DC/DC converter. It has the characters of simple in structure,high in efficieney, performance-price ratio comparatively fine and easy to realize modulization. On work principle, it can shutdown switch devices in circuit at zero electric current state.