Open AccessCharacteristic analysis and design of a novel lorentz force driving actuator for a molded case circuit breaker
Author(s) -
Ro JongSuk,
Bak HyeonJeong,
Jung HyunKyo
Publication year - 2015
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
ISSN - 1751-8679
DOI - 10.1049/iet-epa.2013.0314
Subject(s) - actuator , circuit breaker , power (physics) , lorentz force , electrical engineering , engineering , automation , automotive engineering , mechanical engineering , magnetic field , physics , quantum mechanics
Recently, the demand for a remote controllable actuator for a circuit breaker (CB) has increased because of the trend towards the automation and information technology (IT) of the power system. However, the conventional molded case CB (MCCB) – of which demand is high among CBs – is not only manually controlled, but also liable to breakdown and difficult to find broken components because of the use of the mechanical spring type actuator. To address these problems, a novel Lorentz force driving actuator (LA) is proposed in this research. The LA is suitable for both low‐ and high‐power CBs because of its high power density and the unaffectedness of performance by the stroke. The MCCB equipped with the LA is the first remote controllable low‐power CB and low in maintenance cost. The correct and rapid analysis and design method using a two‐dimensional magneto‐static field analysis and a dynamic analysis is proposed for the small size actuator as LA in this research.