Back to results
US 12,283,444 B2Granted
Vacuum interrupter
AssigneeMitsubishi Electric Corporation
InventorMasashi Kawada
Life of this patent
Estimating the term…
Abstract
Provided is a vacuum interrupter capable of improving an axial magnetic field intensity even at a contact portion other than a region of the contact portion corresponding to a region surrounded by an arm portion and a coil portion. In the vacuum interrupter according to the present disclosure, in each coil electrode, a bypass portion has: a second coil portion which extends so as to have an overlap with a corresponding first coil portion and a power feeding portion opposed to the first coil portion, in a circumferential direction; a first arm portion which connects the second coil portion and a ring portion; and a second arm portion which connects the second coil portion and the first coil portion.
Claims13
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.
18 more elements
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,
- a first cutout is formed between the second coil portion and the ring portion so as to extend in the circumferential direction along the ring portion,
- a second cutout is formed between the second coil portion and the first coil portion so as to extend in the circumferential direction along the first coil portion and the opposed power feeding portion, and
- the coil electrode has a heat dissipation portion which is provided so as to extend in the circumferential direction at the first cutout from one end portion, close to the first coil portion, of the second coil portion.
13 more elements
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,
- 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, and
- a windmill plate which is disposed on a back side of the coil electrode,
- 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,
- a first cutout is formed between the second coil portion and the ring portion so as to extend in the circumferential direction along the ring portion,
- a second cutout is formed between the second coil portion and the first coil portion so as to extend in the circumferential direction along the first coil portion and the opposed power feeding portion,
- a shallow groove and a deep groove which is a groove deeper than the shallow groove are formed on the back side of the coil electrode,
- the shallow groove is formed so as to correspond to a range including the ring portion, the first arm portion, the second coil portion, and the second arm portion, and a range from an end face, at the slit, of the first coil portion to an extension of the second arm portion,
- the deep groove is formed so as to correspond to a range from the power feeding portion to the second coil portion, and
- the windmill plate is attached to the shallow groove and the deep groove such that a leakage current is generated from the power feeding portion to the first coil portion opposed thereto across the power feeding portion.
17 more elements
Dependencies are inferred from the claim text.