Convoluted Arc With Flux Concentrator for Current Interruption

Abstract

Further considerations are given to the use of an electromagnetic flux concentrator for arc plasma control in a rotary arc current interrupter. Such flux concentrators have been previously proposed for plasma fusion and other plasma applications. The possible extension of the proposed method for enhancing the interruption of direct currents with a rotary arc interrupter is discussed with the aid of theoretical modelling of the concentrator geometry and with its possible enhancement of ablation from the arc containing cylinders.

Research on Electrical Contact Characteristics of Brush-Rail Device With Transient Large Current

“…The predict model of contact resistance (22) proposed in this paper was verified on the experimental platform. The contact pressure was set to 100 N, the current amplitude to 1 kA, the current frequency to 20 Hz, the sliding velocity to 38 m/s, and the consecutive run times to 10.…”

“…In Figure 12, the contact resistance gradually decreases with the increase of temperature rise, which is caused by the decrease of material hardness. When the contact pressure was 20 N, 60 N and 100 N, the corresponding undetermined coefficients τ are 0.01, 0.0083 and 0.0114, the maximum errors are 4.52%, 3.87% and 3.89%, and the average errors are 1.42%, 1.51% and 1.24%, indicating the correctness and applicability of (22).…”

“…The current amplitude, contact pressure, and sliding velocity are investigated for the influence factor of arc ablation in rail transit [21]. Current is a necessary condition for arc ablation [22]. In order to verify the effect of the current amplitude on the arc ablation, the contact pressure was set to 20 N, the current amplitude from 0.5 to 3 kA, the current frequency to 20 Hz, and the sliding velocity to 75 m/s.…”