基于高频电子器件的便携式接触电阻测量仪

Portable Contact Resistance Measurement Instrument Based on High Frequency Electronic Devices

电力系统中存在大量的连接部分,接触电阻过大时存在发热烧损风险。通过分析电桥法、直流电阻测量法、工频大电流测量法的工作原理和优缺点,提出了采用现代电力电子设备对工频阻抗测量法设备进行改进,通过高频化极大程度降低了设备的体积、重量和成本,并通过实测给出了仪器测量范围和精度。

There are a large number of connection parts in the power system,and there is a risk of heating and burning loss when the contact resistance is too large.By analyzing the working principles and advantages and disadvantages of the bridge method,DC resistance measurement method and power frequency high current measurement method,this paper proposes to improve the power frequency impedance measurement equipment by using modern power electronic equipment.The volume,weight and cost of the equipment are greatly reduced through high frequency.The measuring range and accuracy of the instrument are given through the actual measurement.