DC vacuum interrupter with multi-polar transverse permanent magnetic structure

Abstract

The present application discloses a DC vacuum interrupter. The cup-shaped contact of the vacuum interrupter is in a transverse magnetic field. The magnetic core is placed in the contact cup. The magnetic core inside the cup of the contact works with the permanent magnets outside the vacuum interrupter to generate transverse magnetic fields in multiple directions between the contacts. While the contacts are open, the arc burns and moves rapidly along the ring shaped contacts under the transverse field along the tangent line of the contacts. While the arc moves rapidly along the ring-shaped contacts, the arc column passes the permanent magnets structure and works with the magnetic core to generate multi-polar transverse magnetic field. While the arc column makes a turn, the number of the transverse fields which are cut by the arc is same with the number of the permanent magnets set.

Claims

1. A DC (Direct Current) vacuum interrupter with a multi-polar transverse permanent magnetic structure, comprising: a ceramic envelope (122), a first permanent magnetic structure (201) at a fixed side outside of the ceramic envelope (122), a second permanent magnetic structure (202) at a moving side outside of the ceramic envelope (122), a first multi-polar magnetic core structure (103) at the fixed side inside of the ceramic envelope (122), a second multi-polar magnetic core structure (106) at the moving side inside of the ceramic envelope (122), a first cup-shaped transverse magnetic contact (102) at the fixed side and a second cup-shaped transverse magnetic contact (107) at the moving side, wherein a multi-polar transverse magnetic field is generated in a gap between the first cup-shaped transverse magnetic contact (102) at the fixed side and the second cup-shaped transverse magnetic contact (107) at the moving side by the first permanent magnetic structure (201) at the fixed side and the multi-polar transverse permanent magnetic structure at the moving side and the first multi-polar magnetic core structure (103) at the fixed side and the second multi-polar magnetic core structure (106) at the moving side; when an arc goes around a first ring contact material (104) at the fixed side and a second ring contact material (105) at the moving side in the gap, the arc cuts magnetic field lines of a transverse magnetic field generated by the first permanent magnetic structure (201) and the second permanent magnetic structure (202) and the first multi-polar magnetic core structure (103) and the second multi-polar magnetic core structure (106); an arc column moves rapidly between the gap under a magnetic force generated by the first cup-shaped transverse magnetic contact (102) at the fixed side and the second cup-shaped transverse magnetic contact (107) at the moving side during a high current arc-melting procedure; thus the transverse magnetic field generated by the first permanent magnetic structure (201) at the fixed side and the second permanent magnetic structure (202) at the moving side and the first multi-polar magnetic core structure (103) at the fixed side and the second multi-polar magnetic core structure (106) at the moving side acts on the arc for multiple times during the high current arc-melting procedure.

2. The DC vacuum interrupter, as recited in claim 1, further comprising a fixed side structure and a moving side structure; wherein the fixed side structure further comprises a first conducting rod (101) at the fixed side, an end cap (121) at the fixed side which is welded on a top of the conducting rod (101); the ceramic shielding (122) is welded on edges of the end cap (121); the first cup-shaped transverse magnetic contact (102) at the fixed side is welded on a bottom of the first conducting rod (101); the first ring contact material (104) at the fixed side is welded on a bottom of the first cup-shaped transverse magnetic contact (102); the first multi-polar magnetic core structure (103) is welded on an inner bottom of the first ring contact material (104) at the fixed side; a welding surface of the first ring contact material (104) is more protruding than a surface of the first multi-polar magnetic core structure (103); the first permanent magnetic structure (201) is placed around the ceramic envelope (122) within a height of the first multi-polar magnetic core structure (103); the first permanent magnetic structure (201) further comprises a first permanent magnetic supporting ring (109) and a first multiple permanent magnetic sets (110) which are inserted evenly around the permanent magnetic supporting ring (109); wherein the moving side structure further comprises a second conducting rod (108) at the moving side; the second cup-shaped transverse magnetic contact (107) is welded on a top of the second conducting rod (108) at the moving side; the second ring contact material (105) at the moving side is welded on a top of the second cup-shaped transverse magnetic contact (107); the second multi-polar magnetic core structure (106) at the moving side is welded on an inner bottom of the second cup-shaped transverse magnetic contact (107); a welding surface of the second ring contact material (105) is more protruding than a surface of the second multi-polar magnetic core structure (106); the second permanent magnetic structure (202) is placed around the ceramic shielding (122); the second permanent magnetic structure (202) further comprises a second permanent magnetic supporting ring (112) and a second multiple permanent magnetic sets (111) which are inserted evenly around the second permanent magnetic supporting ring (112); a vacuum bellow connector (123) is welded on a bottom of the second conducting rod (108); a vacuum bellow (124) is welded on a bottom of the vacuum bellow connector (123); a moving side end cap (125) is welded on a bottom of the vacuum bellow (124); poles of the first multi-polar magnetic core structure (103) is same with a first batch of permanent magnetic poles of the first multiple permanent magnetic sets (110) in the first permanent magnetic structure (201); a number of the poles is not less than two; an angle of each pole of the first multi-polar magnetic core structure (103) is same with an angle of each permanent magnets of the first permanent magnetic structure (201), a north pole and a south pole of each of the first permanent magnets in the first multiple permanent magnetic sets (110) of the first permanent magnetic structure (201) are in a same direction with a north pole and a south pole of the first multi-polar magnetic core structure (103); the north pole or the south pole of each of permanent magnets in the first multiple permanent magnetic sets (110) is direct to the vacuum interrupter; the north pole and the south pole of neighboring permanent magnets in the first multiple permanent magnetic sets (110) are in a same or different direction; a height of the first permanent magnetic structure (201) is same with the height of the first multi-polar magnetic core structure (103), or different with the height of the first multi-polar magnetic core structure (103) according to needs of magnetic fields control; poles of the second multi-polar magnetic core structure (106) is same with a second batch of permanent magnetic poles of the second multiple permanent magnetic sets (111) in the second permanent magnetic structure (202); a number of the poles is not less than two; an angle of each of the poles of the second multi-polar magnetic core structure (106) is same with an angle of each of permanent magnets of the second permanent magnetic structure (202), a north pole and a south pole of each of the permanent magnets in the second multiple permanent magnetic sets (111) of the second permanent magnetic structure (202) are in a same direction with a north pole and a south pole of the second multi-polar magnetic core structure (106); the north pole or the south pole of each of the permanent magnets in the second multiple permanent magnetic sets (111) is direct to the vacuum interrupter; the north pole and the south pole of neighboring permanent magnets in the second multiple permanent magnetic sets (111) are in a same or a different direction; a height of the second permanent magnetic structure (202) is same with the height of the second multi-polar magnetic core structure (106), or different with the height of the second multi-polar magnetic core structure (106) according to the needs of magnetic fields control.

3. The DC vacuum interrupter as recited in claim 2, wherein a distance of end surfaces of the permanent magnets in the second multiple permanent magnetic sets (111) and the first multiple permanent magnetic sets (110) to corresponding end surfaces of the first multi-polar magnetic core structure (103) and the second multi-polar magnetic core structure (106) is less than three times of a length of the permanent magnets respectively.

4. The DC vacuum interrupter as recited in claim 1, wherein the first permanent magnetic structure (201) and the second permanent magnetic structure (202) are independent or close together as a whole with corresponding a permanent magnet supporting ring and a permanent magnet set.

5. The vacuum circuit breaker, wherein a vacuum circuit breaker, comprises a DC vacuum interrupter described in claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a cross-section view along the axial of a DC vacuum interrupter contacts and a permanent magnets excitation structure of a four-polar transverse permanent magnets structure of the present invention of a multi-polar DC vacuum interrupter with a transverse permanent magnets structure.

(2) FIG. 2 is a side view the DC vacuum interrupter contacts and a permanent magnets excitation structure of the four-polar transverse permanent magnets structure of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

(3) FIGS. 3a and 3b are relative position and radial section view of the DC on/off vacuum interrupter contacts and a permanent magnets excitation structure of the four-polar transverse permanent magnets structure of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

(4) FIG. 4a is the relative position of the N-pole and the S-pole of one of the permanent magnetic set of the DC vacuum interrupter contacts and a permanent magnets excitation structure of the four-polar transverse permanent magnets structure of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure. And FIG. 4b is the relative position of another set of the permanent magnet.

(5) FIGS. 5a, 5b and 5c are the perspective view of the relative position of the transverse permanent magnetic structure and the contacts of four-polar, six-polar and eight-polar DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

(6) FIGS. 6a and 6b are the relative position of the N-pole and S-pole of the transverse magnets of the four-polar and six-polar of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

(7) FIG. 7 is a section-view of the four-polar transverse permanent magnet structure DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

(8) FIG. 8 is a side-view of the four-polar transverse permanent magnet structure DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnets structure.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(9) Referring to the drawings, the present invention is described in detail with the embodiments.

(10) FIG. 1 and FIG. 2 are a cross-section view along the axial and the side view of a DC vacuum interrupter contacts and a permanent magnetic excitation structure of a four-polar transverse permanent magnetic structure of the present invention of a multi-polar DC vacuum interrupter with a transverse permanent magnetic structure. As shown in the FIG. 1 and FIG. 2 the fixed side structure further comprises a conducting rod 101, wherein the cup-shaped transverse magnetic contact 102 at the fixed side is welded on the bottom of the conducting rod 101; the ring contact material 104 at the fixed side is welded on the bottom of the cup-shaped transverse magnetic contact 102; the multi-polar magnetic core structure 103 is welded on the inner bottom of the cup-shaped transverse magnetic contact 102 of the fixed side; the welding surface of the ring contact material 104 is more protruding than an outer surface of the multi-polar magnetic core structure 103; the permanent magnetic structure 201 is placed around the ceramic shielding 122 within a height of the multi-polar magnetic core structure 103; the permanent magnetic structure 201 further comprises a permanent magnetic supporting ring 109 and multiple permanent magnetic sets 110.

(11) As shown in FIG. 1 and FIG. 2, the moving side structure further comprises a conducting rod 108 at the moving side; the cup-shaped transverse magnetic contact 107 is welded on a top of the conducting rod 108 at the moving side; the ring contact material 105 at the moving side is welded on a top of the cup-shaped transverse magnetic contact 107; the multi-polar magnetic core structure 106 at the moving side is welded on the inner bottom of the cup-shaped transverse magnetic contact 107; the welding surface of the ring contact material 105 is more protruding than an outer surface of the multi-polar magnetic core structure 106; the permanent magnetic structure 202 is placed around the ceramic shielding 122; the permanent magnetic structure 202 further comprises a permanent magnetic supporting ring 112 and multiple permanent magnetic sets 111.

(12) The fixed side permanent magnet set 110 and the moving side permanent magnet set 111 comprise four permanent magnets respectively which are evenly distributed along the circle of the permanent magnetic supporting ring 109 and the permanent magnetic supporting ring 112.

(13) FIGS. 3a and 3b are relative position and radial section view of the DC vacuum interrupter contacts and a permanent magnets excitation structure of the four-polar transverse permanent magnets structure of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. The moving side permanent magnet set 111 comprises four permanent magnets which are evenly distributed along the circle of the permanent magnetic supporting ring 112 and point to the four poles of the multi-polar magnetic core structure 106 inside the cup-shaped transverse magnetic contact 107. The distance between the end surface of the of the moving side permanent magnet set 111 to the surface of corresponding pole of multi-polar magnetic core structure 106 is l; the length of the permanent magnet is g, l varied in a range of 0 to 3 g.

(14) FIGS. 4a and 4b are the relative position of the N-pole and the S-pole of one of the permanent magnetic set of the DC vacuum interrupter contacts and a permanent magnetic excitation structure of the four-polar transverse permanent magnetic structure of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. As shown in FIGS. 4a and 4b, the direction of the N-polar of S-polar is same with the N-polar and S-polar with a 180 degree difference in the permanent magnetic structure 201 and permanent magnetic structure 202.

(15) FIGS. 5a, 5b and 5c are the perspective view of the relative position of the transverse permanent magnetic structure and the contacts of four-polar, six-polar and eight-polar DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. The poles of the multi-polar magnetic core structure 106 is same with the poles of the permanent magnet in the permanent magnetic structure 202. The angle of the poles of the multi-polar magnetic core structure 106 is same with the poles of the permanent magnet in the permanent magnetic structure 202.

(16) FIGS. 6a and 6b is the relative position of the N-pole and S-pole of the transverse magnets of the four-polar and six-polar of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. The direction of the N-polar of S-polar of the permanent magnets is same with the N-polar and S-polar with a 180 degree difference in the permanent magnet set 111. Both the N-polar and S-polar of the permanent magnets in the permanent magnet set 111 are allowed to point to the vacuum interrupter side. The neighboring N-polar and S-polar are capable to point to the same or different direction.

(17) FIG. 7 is a section-view of the four-polar transverse permanent magnetic structure DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. As shown in FIG. 7, the fixed side structure further comprises a conducting rod 101 at the fixed side, the cup-shaped transverse magnetic contact 102 at the fixed side is welded on the bottom of the conducting rod 101; the ring contact material 104 at the fixed side is welded on the bottom of the cup-shaped transverse magnetic contact 102; the multi-polar magnetic core structure 103 is welded on the inner bottom of the cup-shaped transverse magnetic contact 102 at the fixed side; a welding surface of the ring contact material 104 is more protruding than an outer surface of the multi-polar magnetic core structure 103; the permanent magnetic structure 201 is placed around the ceramic shielding 122 within a height of the multi-polar magnetic core structure 103; the permanent magnetic structure 201 further comprises a permanent magnetic supporting ring 109 and multiple permanent magnetic sets 110. An end cap 121 at the fixed side is welded on the top of the conducting rod 101. A ceramic shielding 122 is welded on the edge of the end cap 121. The moving side structure further comprises a conducting rod 108 at the moving side; the cup-shaped transverse magnetic contact 107 is welded on a top of the conducting rod 108 at the moving side; the ring contact material 105 at the moving side is welded on the top of the cup-shaped transverse magnetic contact 107; the multi-polar magnetic core structure 106 at the moving side is welded on the inner bottom of the cup-shaped transverse magnetic contact 107; a welding surface of the ring contact material 105 is more protruding than an outer surface of the multi-polar magnetic core structure 106; the permanent magnetic structure 202 is placed around the ceramic shielding 122; the permanent magnetic structure 202 further comprises a permanent magnetic supporting ring 112 and multiple permanent magnetic sets 111; a vacuum bellow connector 123 is welded on the bottom of the conducting rod 108; a vacuum bellow 124 is welded on the bottom of the vacuum bellow connector 123; an moving side end cap 125 is welded on a bottom of the vacuum bellow 124;

(18) FIG. 8 is a side-view of the four-polar transverse permanent magnetic structure DC vacuum interrupter of the present invention of a multi-polar DC vacuum interrupter with the transverse permanent magnetic structure. As shown in the FIG. 8, there are two sets of permanent magnetic structure in the gap between the contacts outside of the ceramic shielding, which are the permanent magnetic structure 201 and the permanent magnetic structure 202. The permanent magnet set of the permanent magnetic structure 201 comprises four permanent magnets which are evenly distributed along the circle of the permanent magnetic supporting ring 109. The permanent magnetic structure 202 is similar to the permanent magnetic structure 201. The difference in the height of the permanent magnetic structure 201 and the permanent magnetic structure 202 with the height of the multi-polar magnetic core structure 103 and the multi-polar magnetic core structure 106 is less than three times of the gap between the contacts.

(19) One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limited. Any modification and alteration of the DC vacuum interrupter with multi-polar transverse permanent magnetic structure and the applications thereof are within the protection range of the present invention.