用于非线性电阻片通流容量试验的冲击方波电流源的研究

Study on Impulse Rectangular Current Generator for Energy Enduring Test of Non-linear Varistor

对非线性电阻片能量耐受试验用的冲击方波电流源进行了参数设计和仿真计算,得出了回路及负载参数和回路输出波形参数之间的关系。计算和试验结果表明:将人工传输线的各链电感依次由大到小按一定比例进行选择,既可以抑制波头的过冲,又可以减少方波持续期间的平顶降落,得到符合标准规定的冲击方波电流波。

The circuit parameters of impulse rectangular current generator for energy enduring test of non-linear varistor are simulated and calculated, the relation between the parameters of circuit and the parameters of the impulse current waveform are derived. The theoretical calculation and testing results testify that selecting appropriate inductance L, whose values are reduced in turn according to a certain scale, can not only restrain overshoot of the wave front, but also lessen the amplitude descent of rectangular wave within the current duration. The impulse current waveform, according to IEC and GB standards, can be obtained in the wider dynamic non-linear varistor range environment.