Ezperimental study on DC inductive arcs driven by magnetic fields
Electrical arc within a pair of AgSnO2 contacts was investigated when a DC inductive circuit was opened at different velocities. The arc was driven by axial and transverse magnetic fields. A 28V/5A inductive circuit was adopted as the experiment circuit, of which the time constant was 2 ms. Density of both the axial and the transverse magnetic fields varied from 0 mT to 200 mT. The opening velocity varied from 10 mm/s to 50 mm/s. A high speed camera and an oscilloscope were 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, were obtained at those opening velocities. Material transfer mass was measured at every 5000 breaking operations. Influences of the magnetic fields on the transfer mass were obtained under two types of the magnetic fields at those velocities. The results can be used to design magnetic blow contacts in switches.
material transfer arc root distribution azial and transverse magnetic fields electrical arc inductive load
Zhai Guofu Zhou Xue Yang Wenying
School of Electrical Engineering and Automation, Harbin Institute of Technology P.O.Box 401, Harbin Institute of Technology, Harbin 150001, China
国际会议
温州
英文
39-44
2009-10-18（万方平台首次上网日期，不代表论文的发表时间）