Effect of Axial and Transverse Magnetic Fields on the Arc Duration and Material Transfer

Guofu ZHAI  Xinglei CUI  Xue ZHOU  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E95-C   No.3   pp.395-400
Publication Date: 2012/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E95.C.395
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Electromechanical Devices and Components
Keyword: 
axial magnetic field,  transverse magnetic field,  metallic phase,  gaseous phase,  

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Summary: 
Axial and transverse magnetic fields are widely used in many kinds of switches to decrease the arc erosion. In this paper, the influence of these two kinds of magnetic fields on the arc phase transition was studied particularly for AgSnO2 contacts breaking a 28 V/25 A circuit. The experiments were carried out under resistive and inductive loads in an atmospheric environment. The relationships between flux densities ranging from 0 to 200 mT and the arc duration were obtained. It was found that the transverse magnetic field was more efficient in balancing the arc phases and decreasing the arc erosion. The results can be used to guide the design of arc extinguishment systems in DC high power relays.