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CN-122000218-A - Magnetic latching link mechanism, mechanical disconnecting switch and hybrid direct current solid state circuit breaker

CN122000218ACN 122000218 ACN122000218 ACN 122000218ACN-122000218-A

Abstract

The application discloses a magnetic holding connecting rod mechanism, a mechanical isolating switch and a hybrid direct-current solid-state circuit breaker, and relates to the technical field of piezoelectrics; the magnetic system comprises a permanent magnet and a movable iron core, wherein the movable iron core can linearly move between a closing position and a separating position along a first direction and form magnetic retention through the magnetic force of the permanent magnet when reaching the closing position or the separating position, and the movable contact assembly comprises a movable contact, and the movable iron core is linked with the movable contact assembly so that the movable contact assembly linearly moves along a second direction intersecting the first direction to enable the movable contact to be contacted with or separated from a fixed contact of the mechanical isolating switch. The magnetic retaining connecting rod mechanism can solve the problems of complex structure and high energy consumption of the traditional mechanical isolating switch, and meanwhile, the conversion between the driving direction and the movement direction of the contact is realized.

Inventors

  • LI ZHIHAO
  • Ning Zemin
  • PENG QIONG
  • Chang Hebin
  • JIANG GUPING
  • GONG ZUOYONG
  • QUAN JIAQING

Assignees

  • 上海良信电器股份有限公司

Dates

Publication Date
20260508
Application Date
20260320

Claims (13)

  1. 1. The magnetic latching connecting rod mechanism is characterized by comprising a magnetic system (10) and a moving contact assembly (40), wherein the magnetic system (10) comprises a permanent magnet (11) and a moving iron core (12), the moving iron core (12) can move linearly between a closing position and a separating position along a first direction, and when the closing position or the separating position is reached, magnetic latching is formed through the magnetic force of the permanent magnet (11), the moving contact assembly (40) comprises a moving contact (41), the moving iron core (12) is linked with the moving contact assembly (40), so that the moving contact assembly (40) moves linearly along a second direction intersecting with the first direction, and the moving contact (41) is contacted with or separated from a fixed contact (200) of a mechanical isolating switch.
  2. 2. The magnetic latching linkage as claimed in claim 1, wherein the magnetic system (10) further comprises a coil (13) and a yoke (14), the movable iron core (12) is disposed in a movement region defined by the yoke (14) in a linearly movable manner, and is switched between the closing position and the opening position by energization driving of the coil (13), wherein the coil (13) comprises a closing coil (131) located at a lower portion of the yoke (14) and an opening coil (132) located at an upper portion of the yoke (14), and the permanent magnet (11) is located between the closing coil (131) and the opening coil (132).
  3. 3. The magnetic latching linkage as claimed in claim 1, further comprising a mechanism support (20) and a link (30), wherein the mechanism support (20) is fixedly connected with the movable iron core (12) and can synchronously move along the first direction along with the movable iron core (12), two ends of the link (30) are respectively hinged with the mechanism support (20) and the movable contact assembly (40), and the movable contact assembly (40) can linearly move along the second direction under the driving of the link (30).
  4. 4. A magnetic latching linkage according to claim 3, wherein the number of said links (30) and said moving contact assemblies (40) is two, two of said links (30) are symmetrically disposed on opposite sides of said mechanism support (20), and two of said links (30) and two of said moving contact assemblies (40) are disposed in one-to-one correspondence.
  5. 5. The magnetic retention linkage of claim 1, wherein the first direction is perpendicular to the second direction.
  6. 6. The magnetic latching linkage as claimed in claim 1, wherein the moving contact assembly (40) comprises a contact holder (43), a contact fixing holder (44) and an elastic member (42), the contact holder (43) is connected with the link (30), the contact fixing holder (44) and the contact holder (43) are disposed opposite to each other along the second direction, the moving contact (41) is disposed on the contact fixing holder (44), the elastic member (42) is disposed between the contact holder (43) and the contact fixing holder (44), and the elastic member (42) is configured to provide contact pressure to the moving contact (41) in a closed state.
  7. 7. The magnetic latching linkage of claim 1, wherein the moving contact assembly (40) further comprises a magnetism increasing block (45), the magnetism increasing block (45) being disposed on opposite sides or one side of the moving contact (41).
  8. 8. The magnetic latching linkage of claim 7, wherein said magnetism increasing block (45) comprises a U-shaped magnetism increasing block (451) and a plate-shaped magnetism increasing block (452), said U-shaped magnetism increasing block (451) and said plate-shaped magnetism increasing block (452) being jointly wrapped outside said movable contact (41).
  9. 9. The magnetic latching linkage according to claim 1, wherein the permanent magnet (11) is a circular ring plate, the permanent magnet (11) comprises a first permanent magnet (111) and a second permanent magnet (112) that are magnetically repulsive, the first permanent magnet (111) and the second permanent magnet (112) are semi-circular ring plates, the first permanent magnet (111) and the second permanent magnet (112) form the permanent magnet (11) after being butted, and the movable iron core (12) is movable in a hole of the permanent magnet (11).
  10. 10. The magnetic holding connecting rod mechanism according to claim 9, wherein a circular ring-shaped magnetism increasing block (15) is arranged in a hole of the permanent magnet (11), and/or a full-surrounding magnetism increasing block (16) with a circular hole inside is arranged outside the permanent magnet (11).
  11. 11. A mechanical disconnecting switch, characterized by comprising a fixed contact and the magnetic holding link mechanism (100) according to any one of claims 1 to 10, wherein the fixed contact is arranged corresponding to a moving contact (41) of the magnetic holding link mechanism (100).
  12. 12. A hybrid dc solid state circuit breaker comprising a solid state switch and the mechanical disconnect switch of claim 11 in parallel with the solid state switch.
  13. 13. The hybrid direct-current solid-state circuit breaker is characterized by comprising a solid-state switch and the mechanical isolating switch of claim 11, wherein the mechanical isolating switch comprises a first mechanical isolating switch and a second mechanical isolating switch, the solid-state switch is connected with the first mechanical isolating switch in parallel, and the second mechanical isolating switch is arranged in a loop where the first mechanical isolating switch is located in parallel and is arranged in a loop where the solid-state switch is located in series; in the process of switching on the hybrid direct current solid state circuit breaker, the mechanical disconnecting switch II, the solid state switch and the mechanical disconnecting switch I are sequentially switched on, the solid state switch is switched off, and in the process of switching on the hybrid direct current solid state circuit breaker, the solid state switch is switched on, and the mechanical disconnecting switch I, the solid state switch and the mechanical disconnecting switch II are sequentially switched off.

Description

Magnetic latching link mechanism, mechanical disconnecting switch and hybrid direct current solid state circuit breaker Technical Field The application relates to the technical field of piezoelectric devices, in particular to a magnetic latching connecting rod mechanism, a mechanical disconnecting switch and a hybrid direct current solid state circuit breaker. Background The driving mechanism and the holding mechanism of the mechanical isolating switch for matching the existing solid-state switch are usually arranged independently. Specifically, the electromagnetic drive is adopted to cooperate with the mechanical lock catch to realize opening and closing operation and state maintenance, the number of parts of the structure is more, the assembly and maintenance difficulty is higher, and the long-term operation reliability is insufficient. Meanwhile, the existing driving mode generally needs to be continuously electrified to maintain the state after switching on or switching off, so that the energy consumption is high, and the reliability of the maintained state is limited. In the motion mode, the motion direction of a moving contact of the conventional isolating switch is always consistent with the motion direction of a driving mechanism, and the stroke of the moving contact is directly limited by the driving stroke, so that the over-stroke and the contact pressure of the contact are difficult to optimize independently, and the design flexibility of a contact system is affected. Disclosure of Invention The application aims to provide a magnetic holding connecting rod mechanism, a mechanical isolating switch and a hybrid direct current solid-state circuit breaker, which can solve the problems of complex structure and high energy consumption of the traditional mechanical isolating switch and realize the conversion of a driving direction and a contact movement direction. Embodiments of the present application are implemented as follows: According to the first aspect of the embodiment of the application, a magnetic retaining connecting rod mechanism is provided, the magnetic retaining connecting rod mechanism comprises a magnetic system and a moving contact assembly, the magnetic system comprises a permanent magnet and a moving iron core, the moving iron core can move linearly between a closing position and a separating position along a first direction and form magnetic retaining through the magnetic force of the permanent magnet when reaching the closing position or the separating position, the moving contact assembly comprises a moving contact, and the moving iron core is in linkage with the moving contact assembly, so that the moving contact assembly moves linearly along a second direction intersecting the first direction, and the moving contact is in contact with or separated from a fixed contact of a mechanical disconnecting switch. The magnetic retaining connecting rod mechanism can solve the problems of complex structure and high energy consumption of the traditional mechanical isolating switch, and meanwhile, the conversion between the driving direction and the movement direction of the contact is realized. The magnetic system further comprises a coil and a magnet yoke, wherein the movable iron core is arranged in a movement area limited by the magnet yoke in a linear movement mode and is switched between the closing position and the opening position through energizing driving of the coil, the coil comprises a closing coil positioned at the lower part of the magnet yoke and an opening coil positioned at the upper part of the magnet yoke, and the permanent magnet is positioned between the closing coil and the opening coil. The movable contact assembly is characterized by further comprising a mechanism support and a connecting rod, wherein the mechanism support is fixedly connected with the movable iron core and can synchronously move along the first direction along with the movable iron core, two ends of the connecting rod are respectively hinged with the mechanism support and the movable contact assembly, and the movable contact assembly can linearly move along the second direction under the drive of the connecting rod. As an implementation mode, the number of the connecting rods and the moving contact assemblies is two, the two connecting rods are symmetrically arranged on two opposite sides of the mechanism support, and the two connecting rods and the two moving contact assemblies are arranged in one-to-one correspondence. As an embodiment, the first direction is perpendicular to the second direction. As an implementation manner, the moving contact assembly comprises a contact support, a contact fixing support and an elastic piece, wherein the contact support is connected with the connecting rod, the contact fixing support and the contact support are oppositely arranged along the second direction, the moving contact is arranged on the contact fixing support, the elastic piece is arranged between the c