Investigation on arc characteristics in cup‐shaped contacts with different structure for transverse magnetic field vacuum circuit breaker

2021 ◽  
Author(s):  
Leming Wei ◽  
Shixin Xiu ◽  
Yuzi Jiang ◽  
Bo Yuan ◽  
Chenchen Qu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Circuit Breaker ◽  
Transverse Magnetic ◽  
Vacuum Circuit Breaker ◽  
Arc Characteristics

Arc characteristics during the instability stage on transverse magnetic field contacts

2018 ◽  
Vol 20 (9) ◽  
pp. 095505 ◽  
Author(s):  
Xianhai PANG ◽  
Zixi LIU ◽  
Shixin XIU ◽  
Dingyu FENG
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Arc Characteristics

scholarly journals Effect of Transverse Magnetic Field on Arc Characteristics and Droplet Transfer During Laser-mig Hybrid Welding of Ti-6Al-4V

2021 ◽  
Author(s):  
Chen Yue ◽  
Annan Yin ◽  
Dehua Huang
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic Field ◽  
Contact Time ◽  
Short Circuit ◽  
Transverse Magnetic ◽  
Incomplete Fusion ◽  
Hybrid Welding ◽  
Droplet Transfer ◽  
Spray Transfer ◽  
Arc Characteristics

Abstract In this study, the effect of the transverse magnetic field on the arc characteristics and droplet transfer behavior is investigated during Laser-MIG hybrid welding of Ti-6Al-4V. Especially, transverse magnetic fields with 0 mT, 8 mT, 16 mT, 24 mT, and 32 mT are studied. Results indicate that an appropriate magnetic field can increase the stability of arc characteristics, improve the droplet detachment efficiency, and reduce the welding defects such as incomplete fusion and undercut. By applying 24 mT transverse magnetic field, the maximum arc area can decrease by 48.7% with its variance changing from 2.81 mm2 to 1.06 mm2, indicating that an appropriate transverse magnetic field can shrink the arc and improve its stability. The reason of arc shrinkage is that the electric streamline in the arc rotates away from the laser side to the droplet side due to the influence of external magnetic field. On the other hand, the droplet transfer process become more uniform under the appropriate magnetic field. This phenomenon is mainly attributed to the change of Lorentz force direction during droplet rotation, which resultantly increases effective detachment energy. This phenomenon leads to the reduction of the contact time between droplet and molten pool. The droplet transfer form changes from short-circuit transfer to meso-spray transfer under 24 mT magnetic field because of the reduction of the contact time. Therefore, the incomplete fusion and undercut disappears. At last, the appropriated magnetic field parameters during the laser-MIG parameters (2 kW, 160 A, 2 m/min) is concluded as B =24 mT.

Numerical study of the effect of transverse magnetic field on cylindrical and hemispherical CZ crystal growth of silicon

2010 ◽  
Vol 46 (4) ◽  
pp. 393-402 ◽  
Author(s):  
F. Mokhtari ◽  
A. Bouabdallah ◽  
A. Merah ◽  
S. Hanchi ◽  
A. Alemany
Keyword(s):  
Magnetic Field ◽  
Crystal Growth ◽  
Transverse Magnetic Field ◽  
Numerical Study ◽  
Transverse Magnetic

Heat Transfer in Liquid Metal at an Upward Flow in a Pipe in Transverse Magnetic Field

2020 ◽  
Vol 58 (3) ◽  
pp. 400-409
Author(s):  
N. A. Luchinkin ◽  
N. G. Razuvanov ◽  
I. A. Belyaev ◽  
V. G. Sviridov
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Liquid Metal ◽  
Transverse Magnetic Field ◽  
Transverse Magnetic ◽  
Upward Flow
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