TY - JOUR
T1 - FEM-based calculation of short-time withstand current for air circuit breaker
AU - Niu, Chunping
AU - Dong, Delong
AU - Sun, Hao
AU - Ning, Jiaqi
AU - Yang, Fei
AU - Wu, Yi
AU - Rong, Mingzhe
PY - 2014/2
Y1 - 2014/2
N2 - The main contact system of an ACB(Air Circuit Breaker) is modeled for calculating its electro-dynamic stability and thermal stability, which applies the contact bridge model to describe the microcosmic contacting between movable and fixed contacts, the electric repulsion force and temperature rise of contacts are quantitatively analyzed and its short-time withstand current is evaluated. In electro-dynamic stability calculation, 3D transient electromagnetic analysis is used to quantitatively calculate the effect of eddy current on the electric repulsion force. In thermal stability calculation, the improved contact bridge model is applied to obtain the simulative results of transient thermal field. Two schemes, i.e. shifting shaft hole position and increasing contact ending pressure, are introduced and their effect on short-time withstand current is researched based on the established model. An optimal scheme is given.
AB - The main contact system of an ACB(Air Circuit Breaker) is modeled for calculating its electro-dynamic stability and thermal stability, which applies the contact bridge model to describe the microcosmic contacting between movable and fixed contacts, the electric repulsion force and temperature rise of contacts are quantitatively analyzed and its short-time withstand current is evaluated. In electro-dynamic stability calculation, 3D transient electromagnetic analysis is used to quantitatively calculate the effect of eddy current on the electric repulsion force. In thermal stability calculation, the improved contact bridge model is applied to obtain the simulative results of transient thermal field. Two schemes, i.e. shifting shaft hole position and increasing contact ending pressure, are introduced and their effect on short-time withstand current is researched based on the established model. An optimal scheme is given.
KW - Electric circuit breakers
KW - Electro-dynamic stability
KW - FEM
KW - Short-time withstand current
KW - Thermal stability
UR - https://www.scopus.com/pages/publications/84894814877
U2 - 10.3969/j.issn.1006-6047.2014.02.015
DO - 10.3969/j.issn.1006-6047.2014.02.015
M3 - 文章
AN - SCOPUS:84894814877
SN - 1006-6047
VL - 34
SP - 85
EP - 90
JO - Dianli Zidonghua Shebei/Electric Power Automation Equipment
JF - Dianli Zidonghua Shebei/Electric Power Automation Equipment
IS - 2
ER -