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Structure parameters on the effect of eddy current in the vacuum arcing chamber core

by:Transmart     2021-01-13
Structure parameters on the effect of eddy current in the vacuum arcing chamber core - 2019 03 - 30 15:05:41 in vacuum arcing chamber held within the finite element analysis model of the iron core eddy current peak for 40 ka, relative permeability core is 7000, conductivity of 105 s/mm unchanged, analysis of contactor diameter, open, turn the arm width change on the influence of the eddy current. Eddy current increases with increasing the diameter of the contact. The contactor diameter by 48 mm to 65 mm to 90 mm. At the same time adjust the size of the core. Turn to 10 mm, from arm width is 20 mm. Contact when in the peak current, 65 mm diameter of the eddy current value is 48 mm 2. 17 times, when contacts of 90 mm diameter, 3 of the eddy current value is 65 mm. 13 times; When the current through the zero hour the same change trend, 65 mm diameter contact eddy current value 1 to 48 mm. 54 times, 90 mm contact eddy current value is 65 mm 1 diameter. 49 times. Thus, in both the peak current and current zero, eddy current increases with increasing the diameter of the contact. This is associated with the increase of iron core. Eddy current slightly decreased with the increase of open distance. Made by from 4 mm to 10 mm to 20 mm. Contact a diameter of 65 mm, turn the arm width 20 mm. When in the peak current, the eddy current value of open from 10 mm to 4 mm in 92. 6%, from to the eddy current value of 20 mm to 10 mm in 91. 7%; When the current through the zero, for from the eddy current value of 10 mm to 4 mm in 95. 2%, to 20 mm from the eddy current value is 10 mm 87. 7%. Eddy current decreases with the increase of the turn arm width. Turn the arm width increased by 15 mm to 20 mm to 30 mm, adjust the core at the same time. Contact a diameter of 65 mm, from 10 mm. When in the peak current, turn the arm width for the eddy current value of 20 mm for 15 mm in 68. 0%, turn the arm width for the eddy current value of 30 mm to 20 mm of 53. 8%; When the current through the zero, turn the eddy current value of the arm width 20 mm to 15 mm in 83. 3%, turn the arm width for the eddy current value of 30 mm to 20 mm in 66. 2%. Thus, in both the peak current and current zero, eddy current decreases with the increase of the width of the turn arm. Turn the arm width increases when the core is less relevant.
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