TY - GEN
T1 - Simulation on dwell stage of arcs in bridge type contacts for high-voltage DC relay
AU - Bo, Kai
AU - Zhou, Xue
AU - Zhai, Guofu
AU - Qiao, Xinlei
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/12/9
Y1 - 2016/12/9
N2 - Bridge-Type contacts co-operated with permanent magnet are widely used in 270V/200A DC power relays. The permanent magnet helps to drive the arc out of contact gaps as soon as possible, and also helps to bend and quench the arc rapidly. Arc dwell stage is the first stage between arc ignition and the arc root moves out of the gap. This paper is focused on numerical investigation of dwell stage behaviors in bridge-Type contacts in a 270V/200A DC power relay. A 2-D nitrogen arc model based on magneto-hydrodynamics theory is built and calculated. Basic dwell stage parameters are described by a set of coupled equations, including Navier-Stokes equation, energy equations and Maxwell equations. By adopting a floating potential, the voltage drop between movable contact and stationary contacts is solved. The detailed dwell stage behaviors are presented and preliminarily discussed according to the calculated temperature and arc current density distributions. Furthermore, experiments are carried out to validate the simulation results. The simulated arc voltage shows good agreement with that of acquired by experiments.
AB - Bridge-Type contacts co-operated with permanent magnet are widely used in 270V/200A DC power relays. The permanent magnet helps to drive the arc out of contact gaps as soon as possible, and also helps to bend and quench the arc rapidly. Arc dwell stage is the first stage between arc ignition and the arc root moves out of the gap. This paper is focused on numerical investigation of dwell stage behaviors in bridge-Type contacts in a 270V/200A DC power relay. A 2-D nitrogen arc model based on magneto-hydrodynamics theory is built and calculated. Basic dwell stage parameters are described by a set of coupled equations, including Navier-Stokes equation, energy equations and Maxwell equations. By adopting a floating potential, the voltage drop between movable contact and stationary contacts is solved. The detailed dwell stage behaviors are presented and preliminarily discussed according to the calculated temperature and arc current density distributions. Furthermore, experiments are carried out to validate the simulation results. The simulated arc voltage shows good agreement with that of acquired by experiments.
KW - DC relay
KW - arc dwell stage
KW - bridge-Type contacts
KW - numerical simulation
UR - https://www.scopus.com/pages/publications/85009347058
U2 - 10.1109/HOLM.2016.7780026
DO - 10.1109/HOLM.2016.7780026
M3 - 会议稿件
AN - SCOPUS:85009347058
T3 - Electrical Contacts, Proceedings of the Annual Holm Conference on Electrical Contacts
SP - 163
EP - 166
BT - Proceedings of the 62nd IEEE Holm Conference on Electrical Contacts, Holm 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 62nd IEEE Holm Conference on Electrical Contacts, Holm 2016
Y2 - 9 October 2016 through 12 October 2016
ER -