Open AccessMovement characteristic of a circuit breaker with repulsion force compensated contact system
Author(s) -
Chunping Niu,
Jing Ding,
Fei Yang,
Jiajian Man,
Ruiguang Ma
Publication year - 2015
Publication title -
advances in mechanical engineering/advances in mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.318
H-Index - 40
eISSN - 1687-8140
pISSN - 1687-8132
DOI - 10.1177/1687814015573820
Subject(s) - circuit breaker , lorentz force , contact force , compensation (psychology) , mechanism (biology) , closing (real estate) , mechanics , control theory (sociology) , voltage , mechanical engineering , engineering , electrical engineering , physics , computer science , classical mechanics , magnetic field , law , psychology , artificial intelligence , psychoanalysis , political science , control (management) , quantum mechanics
This article proposes a new structure of contact system to improve short-time withstand capacity of direct current circuit breaker. With this new contact system, the electrodynamic repulsion force is compensated. The principle of compensation is illustrated at the beginning. Then the electrodynamic force of the contact system is quantified by analyzing the Lorentz force in conductive loop and the Holm force between contacts. The factors and their influences on electrodynamic force are also investigated. Subsequently, based on multibody dynamics, the movement characteristic model is established. The opening and closing characteristics of breaker and the dynamic stress distribution of closing putters are investigated. The results are verified by experiments. It is indicated that this contact system can improve the short-time withstand capacity. The research could provide theoretical references to large-capacity medium-voltage air direct current circuit breaker development