Thomson coil integrated moving contact in vacuum interrupter

Patent metadata

Field	Value
Publication number	US-2020258704-A1
Application number	US-201916271927-A
Country	US
Kind code	A1
Filing date	Feb 11, 2019
Priority date	Feb 11, 2019
Publication date	Aug 13, 2020
Grant date	—

Abstract

A vacuum chamber contact assembly includes a vacuum housing assembly, a conductor assembly, and an operating mechanism. The vacuum housing assembly defines a sealed enclosed space. The conductor assembly includes a first stationary conductor assembly, a second stationary conductor assembly, and a movable conductor assembly. The operating mechanism includes a number of stationary components, a number of movable components and an actuator/latch assembly. The movable conductor assembly and the operating mechanism movable components are disposed entirely within the vacuum housing assembly enclosed space. The actuator/latch assembly includes an open, first latch unit and a close, second latch unit. The actuator/latch assembly is structured to maintain the movable conductor assembly in both the first position and the second position.

First claim

What is claimed is:

1 . A vacuum chamber contact assembly for a circuit breaker, said circuit breaker including a housing assembly, said vacuum chamber contact assembly comprising:
a vacuum housing assembly defining a sealed enclosed space; a conductor assembly including a first stationary conductor assembly, a second stationary conductor assembly, and a movable conductor assembly; an operating mechanism including a number of stationary components, a number of movable components and an actuator/latch assembly; wherein said movable conductor assembly and said operating mechanism movable components are disposed entirely within said vacuum housing assembly enclosed space; wherein said actuator/latch assembly includes an open, first latch unit and a close, second latch unit; said movable conductor assembly moves between an open, first position, wherein said movable conductor assembly is spaced from, and is not in electrical communication with said first stationary conductor assembly and said second stationary conductor assembly, and, a second position, wherein said movable conductor assembly is coupled to, and is in electrical communication with said first stationary conductor assembly and said second stationary conductor assembly; and wherein said actuator/latch assembly is structured to maintain said movable conductor assembly in both said first position and said second position.

2 . The vacuum chamber contact assembly of claim 1 wherein:
said first latch unit is disposed on the outer surface of said vacuum housing assembly at a first end of said operating mechanism number of movable components path of travel; and
said second latch unit is disposed on the outer surface of said vacuum housing assembly at a second end of said operating mechanism number of movable components path of travel.

3 . The vacuum chamber contact assembly of claim 2 wherein:
said first latch unit disposed entirely on the outer surface of said vacuum housing assembly; and
said second latch unit disposed entirely on the outer surface of said vacuum housing assembly.

4 . The vacuum chamber contact assembly of claim 2 wherein:
said first latch unit includes a latch device and a release device; and
said second latch unit includes a latch device and a release device.

5 . The vacuum chamber contact assembly of claim 4 wherein:
said first latch device is a permanent first magnet having a first EM field;
said first release device is a first EM field generator structured to be in one of a non-active state, wherein said first EM field generator does not generate an EM field, and, a second state, wherein said first EM field generator generates an EM field sufficient to negate said first magnet first EM field;
said second latch device is a permanent second magnet having a second EM field; and
said second release device is a second EM field generator structured to be in one of a non-active state, wherein said second EM field generator does not generate an EM field, and, a second state, wherein said second EM field generator generates an EM field sufficient to negate said second magnet first EM field.

6 . The vacuum chamber contact assembly of claim 1 wherein:
said operating mechanism number of stationary components including a rail;
said operating mechanism number of movable components including a traveler assembly;
said traveler assembly movably disposed on said rail and structured to travel between a first position and a second position;
said first stationary conductor assembly including a stationary contact;
said second stationary conductor assembly includes a stationary contact;
said movable conductor assembly including a first movable contact and a second movable contact;
said first stationary contact and said second stationary contact coupled to said vacuum housing assembly;
said first movable contact and said second movable contact coupled to said traveler assembly;
wherein said first movable contact moves between an open, first position, wherein said movable first movable contact is not coupled to, and is not in electrical communication with said first stationary contact, and, a second position, wherein said first movable contact is coupled to, and is in electrical communication with said first stationary contact; and
wherein said second movable contact moves between an open, first position, wherein said movable second movable contact is not coupled to, and is not in electrical communication with said second stationary contact, and, a second position, wherein said second movable contact is coupled to, and is in electrical communication with said second stationary contact.

7 . The vacuum chamber contact assembly of claim 6 wherein:
said rail has a non-circular cross-section;
said traveler assembly includes a body assembly, a first armature, and a second armature;
said traveler assembly body assembly defining a passage corresponding to said rail non-circular cross-section, said traveler assembly body assembly having a first end, a medial portion, and a second end;
said first armature coupled to said traveler assembly body assembly first end;
said second armature coupled to said traveler assembly body assembly second end;
said movable conductor assembly including a crossbar; and
said movable conductor assembly crossbar coupled to said traveler assembly body assembly medial portion.

8 . The vacuum chamber contact assembly of claim 7 wherein:
said actuator/latch assembly including a Thomson coil assembly having a primary coil and a secondary coil/disk;
said Thomson coil primary coil coupled to the inner surface of said vacuum housing assembly and disposed about said rail;
said Thomson coil secondary coil/disk coupled to said traveler assembly body assembly; and
wherein said Thomson coil assembly is structured to be in one of a de-energized state, wherein said Thomson coil primary coil does not repel said Thomson coil secondary coil/disk, and an energized state, wherein said Thomson coil primary coil repels said Thomson coil secondary coil/disk.

9 . The vacuum chamber contact assembly of claim 8 wherein:
said first latch unit is disposed on the outer surface of said vacuum housing assembly at a first end of said operating mechanism number of movable components path of travel; and
said second latch unit is disposed on the outer surface of said vacuum housing assembly at a second end of said operating mechanism number of movable components path of travel;
said first latch unit includes a latch device and a release device;
said second latch unit includes a latch device and a release device;
said first latch device is a permanent first magnet having a first EM field;
said first release device is a first EM field generator structured to be in one of a non-active state, wherein said first EM field generator does not generate an EM field, and, a second state, wherein said first EM field generator generates an EM field sufficient to negate said first magnet first EM field;
said second latch device is a permanent second magnet having a second EM field;
said second release device is a second EM field generator structured to be in one of a non-active state, wherein said second EM field generator does not generate an EM field, and, a second state, wherein said second EM field generator generates an EM field sufficient to negate said second magnet first EM field;
wherein, when said traveler assembly is in said first position, said first armature is disposed effectively within said first EM field; and
wherein, when said traveler assembly is in said second position, said second armature is disposed effectively within said second EM field.

10 . The vacuum chamber contact assemb

Assignees

• Eaton Intelligent Power Ltd

Inventors

• Yu Li
• Wang Hongbin
• Mueller Robert W
• Rohn David
• Rockhill Andrew A

Classifications

• H01H1/20

  Bridging contacts {(for circuit breakers H01H73/045)} · CPC title

• H01H33/285

  using electro-dynamic repulsion (assisting the movement of pistons by accelerating coil H01H33/882) · CPC title

• H01H33/6662 Primary

  using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators · CPC title

• H01H50/42

  Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement · CPC title

• H01H33/66207

  Specific housing details, e.g. sealing, soldering or brazing · CPC title