70 / 2022-03-09 21:14:13

Research on Axial Magnetic Field Characteristics of A Novel Horseshoe Contact with Magnetic Field Enhanced Slotted Contact

Axial Magnetic Field,novel horseshoe contact,vacuum arc

Purpose

In this paper, a special slotted design on contact was proposed, which could strengthen the bipolar axial magnetic field of the horseshoe contact significantly. The objective of this paper is to determine the effect of the enhanced axial magnetic field on the high-current vacuum arc characteristics under the slotted design on contact surface. The researches can significantly improve the magnetic field characteristics of traditional horseshoe contacts.

Researching methods

The contact diameter was 120 mm. The contact material was CuCr50 (50% Cr). The contact gap ranged from 15 to 40 mm. The current was up to 40 kA rms and current frequency was 50 Hz. Based on experimental measurement and simulation, the axial magnetic field characteristics of the novel horseshoe contact with a magnetic field enhanced slotted contact will be determined.

Results/discussion

The effect of magnetic field enhanced slotted contact on axial magnetic field characteristics of the horseshoe contact will be compared to the traditional design. The results indicated that the enhanced AMF horseshoe contact had a better axial magnetic field than that of the traditional horseshoe contact. Under the arc current level of 30 kA rms and the contact gap of 40mm, the maximum value of the axial magnetic field of the enhanced AMF horseshoe contact was 183 mT, which was much higher than that of the traditional horseshoe contact of 43mT.

Conclusions

From the experimental results, the axial magnetic field characteristics of the novel horseshoe contact with the magnetic field enhanced slotted contact was determined. The researches based on the experiments and simulation indicated that the magnetic field enhanced slotted contact significantly improve the axial magnetic field characteristics of traditional horseshoe contacts.