国产化A型地铁车辆的差动电流传感器

Differential Current Transducer for Localization Type A Metro Vehicle

研究目的:研制开发用于漏电检测的差动电流传感器,以适应国产化A型地铁车辆的牵引逆变器接地保护的要求。研究方法:分析差动电流传感器在国产化A型地铁车辆高压柜电路中的功能及电路原理,总结介绍该差动电流传感器的外形结构、材料特点、性能参数及运用分析。研究结果:通过差动电流传感器在广州地铁1号线A型地铁车辆装车考核,证明该差动电流传感器工作性能可靠、稳定。研究结论:磁调制式差动电流传感器的研制与装车考核,其对地铁车辆的漏电流检测精度能达到±10%以上,并有较强的抗电磁干扰能力。与其它类型的电流传感器相比,该种差动电流传感器有显著的优越性,能适应国产化地铁车辆牵引逆变器的要求。

Research purposes： By researching and developing differential current transducer used for leakage detecting, to adapt the ground protection of traction inverter in localization type A metro vehicle. Research methods：This paper analyzes differential current transducer function and circuit principle used in high - voltage board circuit of localization type A metro vehicle, then introduces its outline structure and material features and performance. Research results：By application of differential current transducer in the field test for Guangzhou Metro Line 1, this paper proves the differential current transducer with reliable and stable working performance. Research conclusions：By making field test of magnetic modulation type differential current transducer in Guangzhou Metro Line 1, which proves whose leakage current test accuracy can reach above ±10% , with high immunity to external interference. Compared with other type current transducer, magnetic modulation type with remarkable advantage, can adapt to the requirement of traction inverter in localization type A metro vehicle.