三端电阻器分压影响曲线分析及其合理使用

The Curve Analysis and Use of Three Terminal Resistor as Voltage Divider

三端电阻器的合理使用是电力电子领域一个十分重要的问题。三端电阻器作为分压器使用,若使用不当,会造成调压"调不上"或调压"调不稳",经常发生分压器电阻被烧坏事件。通过分析输出电压、电流与分压器比系数K的影响曲线,指出了合理选择分压器额定电流及分压比,有效规避使用风险的方法。

The rational use of three terminal resistor is a very important issue in the field of power electronics. Three terminal resistor is used as a voltage divider,if used improperly which can cause the stability of pressure even burned. This paper studies the output voltage and the load,the divider ratio, points out the rational choice of rated cur-rent and ratio can avoid the risk.