针对轴电流抑制问题的碳纳米管材料场发射研究

Field Emission of Carbon Nanotube Materials for Suppression of Bearing Current

针对电机的轴电流问题,提出一种利用碳纳米材料的场发射特性,通过非接触方式放电来抑制和消除轴电流的方法。首先,介绍了碳纳米材料的优越性,分析了碳纳米材料的场致发射特性。然后,分析了发射体尖端与阳极金属板之间的距离对电场强度的影响。最后,利用探针台、显微镜等微距离实验设备对TNF300型号碳纳米管纤维进行非真空条件下的场发射实验,得出不同距离下的碳纳米材料的电压和电流曲线,对数据进行处理之后绘制场发射特性曲线,并对不同距离下的结果进行对比分析。

In order to solve the problem of bearing current in motor,a new method to suppress and eliminate bearing current by means of field emission characteristics of carbon nano-materials is proposed.Firstly,the advantages of carbon nano-materials are introduced,and the field emission characteristics of carbon nano-materials are analyzed.Secondly,the influence of the distance between the emitter tip and the anode metal plate on the field strength is analyzed.Finally,the field emission experiments of TNF300 type carbon nanotube fibers under non vacuum conditions are carried out by means of micro distance experimental equipment such as probes,microscopes and microscopes.The voltage and current curves of carbon nano-materials at different distances are obtained.After processing the data,the field emission characteristics are plotted and the results under different distances are compared and analyzed.