Title :
The transient thermal propagation of static contacts
Author :
Wang, Qiping ; Rong, Mingzhe ; Sun, Ming
Author_Institution :
Dept. of Electr. Eng., Xi´´an Jiaotong Univ., China
Abstract :
The transient thermal propagation of static contact has significant effects on contact welding, contact erosion and the design of contact system of low voltage apparatus. The finite difference method is used to calculate the transient thermal propagation of static contact by computer. In the present paper, a numerical model to calculate the temperature field distribution, the electrical potential field distribution and the Joule heat distribution in the bulb of contact are deduced. As an example, the static contact temperature rise of a contactor is calculated. The research work is of certain importance to thermal propagation of static electrical contact and can be a good guidance to design of low voltage apparatus.
Keywords :
contact potential; contact resistance; electric potential; electrical contacts; finite difference methods; temperature distribution; wear; Joule heat distribution; contact erosion; contact welding; electrical potential field distribution; finite difference method; low voltage apparatus; static contacts; temperature field distribution; transient thermal propagation; Boundary conditions; Contacts; Electric potential; Equations; Low voltage; Temperature distribution; Thermal conductivity; Thermal engineering; Thermal resistance; Welding;
Conference_Titel :
Electrical Contacts, 1994. Proceedings of the Fortieth IEEE Holm Conference on Electrical Contacts
Print_ISBN :
0-7803-2133-2
DOI :
10.1109/HOLM.1994.636841
