US 12,283,444 B2
Vacuum interrupter
Masashi Kawada, Tokyo (JP)
Assigned to Mitsubishi Electric Corporation, Tokyo (JP)
Appl. No. 17/916,612
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed May 28, 2020, PCT No. PCT/JP2020/021147
§ 371(c)(1), (2) Date Oct. 3, 2022,
PCT Pub. No. WO2021/240733, PCT Pub. Date Dec. 2, 2021.
Prior Publication US 2023/0154705 A1, May 18, 2023
Int. Cl. H01H 1/02 (2006.01); H01H 33/66 (2006.01); H01H 33/664 (2006.01)
CPC H01H 33/6641 (2013.01) [H01H 1/0203 (2013.01); H01H 33/6606 (2013.01); H01H 2033/6613 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A vacuum interrupter comprising: a fixed-side electrode rod which is fixed to one end portion of a container having a bottomed cylindrical shape; a movable-side electrode rod which is movably provided at another end portion of the container; a coil electrode which is provided at each of opposed ends of both electrode rods, which are the movable-side electrode rod and the fixed-side electrode rod, and generates a magnetic field in an axial direction, which is a direction along an axis of both electrode rods, by current conduction; and a contact portion which is provided on an opposed side of each coil electrode, wherein
each coil electrode includes
a ring portion which is concentrically fixed to a corresponding one of both electrode rods,
a plurality of first coil portions which are disposed so as to be spaced apart from each other in a circumferential direction of the coil electrode by slits,
a plurality of power feeding portions which are provided at end portions of the plurality of first coil portions, respectively, and
at least one bypass portion which is provided so as to connect at least one corresponding first coil portion of the plurality of first coil portions and the ring portion so as to define a current path with a circumferential component between the corresponding first coil portion and the ring portion,
the at least one bypass portion has
a second coil portion which extends so as to have an overlap with the corresponding first coil portion and the power feeding portion opposed to the first coil portion, in the circumferential direction,
a first arm portion which connects the second coil portion and the ring portion, and
a second arm portion which connects the second coil portion and the first coil portion,
the at least one bypass portion is a plurality of bypass portions,
the first arm portion of each of the plurality of bypass portions is provided at a position extended radially from an axial center of the coil electrode, and
when: a line connecting the axial center of the coil electrode and a center portion in the circumferential direction of the first arm portion is defined as a reference line;
an angle formed between the reference line and a line connecting one end portion, close to the opposed power feeding portion, of the second coil portion and the axial center of the coil electrode is denoted by α; and
an angle formed between the reference line and a line connecting an end portion, close to the first coil portion, of the opposed power feeding portion and the axial center of the coil electrode is denoted by β,
β−15°≤α≤β+15° is satisfied.