摘要
研究AgSnO2触头组以不同速度分断直流感性回路产生的电弧在纵向与横向磁吹作用下的特性参数。电压与电流为28V/5A,回路时间常数为2ms。吹弧磁感应强度为0～200mT,分断速度为10～50mm/s。采用高速摄像机记录电弧随时间变化的图像,同时,采用数字示波器存储电弧电压波形。研究在不同分断速度下,燃弧时间、电弧停滞时间与吹弧磁场强度的关系,以及弧根位置分布、移动速度与吹弧磁场强度的关系。在不同磁场与分断速度下,每5000次分断操作测试质量转移,比较不同强度与类型的磁场对质量转移的影响。该研究可为永磁体吹弧技术在开关设计中的应用提供依据。
Electrical arc within a pair of AgSnO2 contacts is investigated when a DC inductive circuit is opened at different velocities.The arc is driven by axial and transverse magnetic fields.A 28V/5A inductive circuit is adopted as the experiment circuit,of which the time constant is 2 ms.Density of both the axial and the transverse magnetic fields varies from 0mT to 200mT.The opening speed varies from 10mm/s to 50mm/s.A high speed camera and an oscilloscope are used to record time variations of arc images and arc voltages,simultaneously.Relationships between flux density and arc parameters,such as arc durations,arc stagnation time,distribution of arc positions and arc root velocities,are obtained at those opening speeds.Material transfer mass is measured at every 5000 breaking operations.Influences of the magnetic fields on the transfer mass are obtained under two types of the magnetic fields at those speeds.The results can be used to design magnetic blow contacts in switches.
出处
《电工技术学报》
EI
CSCD
北大核心
2011年第1期68-74,共7页
Transactions of China Electrotechnical Society
基金
总装"十一五"预研资助项目(51323050302)
关键词
质量转移
弧根分布
吹弧磁场
电弧
感性负载
Material transfer
arc root distribution
axial and transverse magnetic fields
electrical arc
inductive load
