Motion and Splitting of Vacuum Arc Column in Transverse Magnetic Field Contacts at Intermediate-Frequency

ZHU Liying(朱立颖); WU Jianwen(武建文); JIANG Yuan(蒋原)

doi:10.1088/1009-0630/16/5/03

Plasma Science and Technology > 2014 > 16(5): 454-459. > DOI: 10.1088/1009-0630/16/5/03

ZHU Liying(朱立颖), WU Jianwen(武建文), JIANG Yuan(蒋原). Motion and Splitting of Vacuum Arc Column in Transverse Magnetic Field Contacts at Intermediate-Frequency[J]. Plasma Science and Technology, 2014, 16(5): 454-459. DOI: 10.1088/1009-0630/16/5/03

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Motion and Splitting of Vacuum Arc Column in Transverse Magnetic Field Contacts at Intermediate-Frequency

Automation Science and Electrical Engineering, BeiHang University, Beijing 100191, China

Funds: supported by Special Scientific and Research Funds for Doctoral Specialty of Institution of Higher Learning of China (No. 200800060004), National Natural Science Foundation of China (No. 50877002), and the Innovation Foundation of BUAA for Ph.D Graduates of China

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Received Date: January 30, 2013

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Abstract

Abstract

Arc motion and splitting of vacuum arc at intermediate frequency (400-800 Hz) were investigated under transverse magnetic field (TMF). The experiment was performed on cup-type TMF contacts with contact diameter of 40 mm and a contact gap of 4 mm in a single-frequency circuit. With high-speed photography we characterized the arc appearance at different arc cur- rents from 3.3 kA-rms to 10 kA-rms at intermediate frequencies. As arc current increases from 3.3 kA-rms to 10 kA-rms the arc appearance changes obviously. When current value is 3.3 kA- rms (current frequency 400-800 Hz), there is almost no splitting arc; when the current exceeds 5 kA-rms (current frequency 400-800 Hz), the arc rotates at a speed above 20 m/s, accompanied by an observable splitting arc. The splitting arc could be observed at different frequencies and the arc-voltage had no noises when splitting occurred. The motion direction and the velocity of arc column were studied. Finally, the formation of a split arc was discussed.
- arc motion,
- split arc,
- transverse magnetic field (TMF),
- intermediate frequency vacuum arc,
- vacuum arc,
- arc appearance

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References (20)

References

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