WO2024078421A1 - Relais - Google Patents

Relais Download PDF

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Publication number
WO2024078421A1
WO2024078421A1 PCT/CN2023/123423 CN2023123423W WO2024078421A1 WO 2024078421 A1 WO2024078421 A1 WO 2024078421A1 CN 2023123423 W CN2023123423 W CN 2023123423W WO 2024078421 A1 WO2024078421 A1 WO 2024078421A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic conductor
magnetic
contact
support seat
hole
Prior art date
Application number
PCT/CN2023/123423
Other languages
English (en)
Chinese (zh)
Inventor
苏礼季
代文广
王萌
Original Assignee
厦门宏发电力电器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厦门宏发电力电器有限公司 filed Critical 厦门宏发电力电器有限公司
Publication of WO2024078421A1 publication Critical patent/WO2024078421A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact

Definitions

  • the disclosed embodiments relate to the technical field of relays, and in particular to a high-voltage direct current relay.
  • a relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits.
  • a relay is actually an "automatic switch” that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.
  • High-voltage DC relay is a type of relay.
  • an anti-short-circuit ring electromagnetic structure is usually set in the relevant technology. It is further divided into a follower structure and a fixed structure according to the position of the upper yoke.
  • the follower structure refers to the upper yoke being set on the movable component of the relay
  • the fixed structure refers to the upper yoke being set at a fixed position other than the movable component.
  • the short-circuit resistance of the fixed anti-short-circuit structure is greatly enhanced, the short-circuit resistance and breaking resistance are negatively correlated, resulting in a weakened breaking resistance.
  • the follower anti-short-circuit structure is affected by the holding force of the moving iron core. When the short-circuit current is high, the iron core will be disengaged, causing the contacts to be disconnected. To increase the holding force of the moving iron core, the coil needs to be increased, which is inconsistent with the small volume and lightweight.
  • the embodiment of the present disclosure provides a relay to take into account both short-circuit resistance and ultimate breaking capacity.
  • the relay of the disclosed embodiment includes a contact container, a pair of static contact lead-out terminals, a first magnetic conductor, a push rod assembly, a moving contact assembly and a third magnetic conductor, wherein the contact container has a contact chamber; a pair of static contact lead-out terminals are connected to the contact container, and at least part of the static contact lead-out terminals are located in the contact chamber; the first magnetic conductor is arranged in the contact chamber and is fixed relative to the contact container; the push rod assembly includes a rod portion and a support seat, the rod portion is movable along the axial direction of the rod portion relative to the contact container, the support seat is arranged at one end of the rod portion along the axial direction and at least partially extends into the contact chamber; the moving contact assembly is movable along the axial direction of the rod portion relative to the support seat, the moving contact assembly includes a moving reed and a second magnetic conductor, The two ends of the moving spring are used to contact or separate with a pair of static contact lead-out ends.
  • the first magnetic conductor is located on the side of the moving spring facing the static contact lead-out end, and the second magnetic conductor is fixedly connected to the side of the moving spring facing away from the first magnetic conductor, and the second magnetic conductor is used to form a first magnetic circuit with the first magnetic conductor;
  • the third magnetic conductor is connected to the support seat and is located on the side of the moving spring facing away from the first magnetic conductor, and is movably arranged in the contact chamber along the axial direction of the rod portion, and the third magnetic conductor is used to form a second magnetic circuit with the first magnetic conductor; wherein, in the process of disconnecting the moving spring from the static contact lead-out end, the third magnetic conductor takes precedence over the second magnetic conductor in a direction away from the third magnetic conductor.
  • a magnetic body moves in the direction of motion.
  • the movable contact assembly is movable relative to the support seat along the axial direction of the rod portion between a first position close to the static contact lead-out end and a second position away from the static contact lead-out end;
  • the relay further comprises a first elastic member, which is disposed between the support seat and the moving contact assembly and is used for applying an elastic force toward the first position to the moving contact assembly.
  • the magnetic pole surface of the second magnetic conductor facing the first magnetic conductor is flush with the magnetic pole surface of the third magnetic conductor facing the first magnetic conductor.
  • the magnetic spacing between the third magnetic conductor and the first magnetic conductor is greater than the magnetic spacing between the second magnetic conductor and the first magnetic conductor.
  • the movable contact assembly is movably connected to the support seat via a limiting structure, and the limiting structure is used to limit the movement of the movable contact assembly relative to the support seat between the first position and the second position;
  • the limiting structure includes:
  • a limiting groove is provided on one of the moving contact assembly and the supporting seat, the limiting groove extends along the axial direction of the rod; a groove wall of the limiting groove has a stop wall at one end close to the static contact lead-out end; and
  • a limit block is arranged on the other of the moving contact assembly and the support seat, the limit block is slidably matched with the limit groove, and in the first position, the stop wall stops at the limit block.
  • a second gap is provided between the limiting block and the side wall of the limiting groove
  • the first gap is smaller than the second gap.
  • the limiting block is disposed on the second magnetic conductor, and the limiting groove is disposed on the supporting seat.
  • the support seat comprises:
  • the bracket is connected to the base, and the limiting groove is arranged on the bracket.
  • the third magnetic conductor has a through hole, and the first elastic member is inserted into the through hole.
  • the thickness of the second magnetic conductor is equal to the thickness of the third magnetic conductor.
  • the contact container further has a pair of first through holes and a second through hole, wherein the first through hole and the second through hole are both connected to the contact chamber; a pair of static contact lead-out terminals are respectively provided through the pair of first through holes;
  • the relay further includes a connecting member, which is passed through the second through hole and includes a first end and a second end, wherein the first end is connected to the contact container, and the second end is connected to the first magnetic conductor.
  • the contact container comprises:
  • the first through hole and the second through hole are formed in the insulating cover, and the first end of the connecting member is connected to the outer wall surface of the insulating cover.
  • the insulating cover includes a ceramic cover and a frame sheet, the ceramic cover includes the top wall and the side wall, and the other end of the side wall is connected to the yoke plate through the frame sheet;
  • a first metallization layer is provided at the periphery of the first through hole, and a second metallization layer is provided at the periphery of the second through hole;
  • the static contact lead-out terminal is welded to the top wall through the first metallization layer, and the first end of the connector is welded to the top wall through the second metallization layer.
  • the first magnetic conductor is spaced apart from the inner wall surface of the top wall.
  • the first magnetic conductor includes a plurality of stacked magnetic conductive sheets, and the plurality of magnetic conductive sheets are connected to the second end of the connector.
  • the contact container comprises:
  • the relay further includes a fixing frame, which is disposed in the contact chamber and fixedly connected to the yoke plate, and the first magnetic conductor is fixedly connected to the fixing frame.
  • the second and third magnets are located on the side of the moving spring away from the first magnet.
  • an anti-short-circuit structure is formed between the first and second magnets, and between the third and first magnets, effectively raising the upper limit of the anti-short-circuit current carrying capacity.
  • the third magnet moves in a direction away from the first magnet before the second magnet. This hierarchical disconnection method is more conducive to completing the disconnection. Therefore, the relay of the disclosed embodiment can meet the requirements of extreme disconnection while ensuring the anti-short-circuit capability.
  • FIG1 is a three-dimensional schematic diagram of a relay according to an embodiment of the present disclosure, in which a housing, an electromagnet unit and an arc extinguishing unit are omitted.
  • FIG. 2 is a schematic diagram showing FIG. 1 with the ceramic cover and frame removed.
  • FIG. 3 is a schematic top view of FIG. 1 .
  • FIG. 4 shows a cross-sectional view taken along line A-A in FIG. 3 .
  • FIG. 5 is an exploded schematic diagram of FIG. 1 .
  • FIG6 shows a cross-sectional view taken along line A-A in FIG3 , wherein the ceramic cover and the frame sheet are omitted and the overtravel is completed.
  • FIG. 7 shows a cross-sectional view taken along line B-B in FIG. 3 , wherein the ceramic cover and the frame are omitted and the overtravel is completed.
  • FIG. 8 shows a partial enlarged view of the X in FIG. 7 .
  • FIG. 9 shows a side view of FIG. 2 , in which the overtravel has been completed.
  • FIG10 shows a cross-sectional view taken along line A-A in FIG3 , in which the ceramic cover and the frame are omitted, and the third magnetic conductor moves prior to the second magnetic conductor.
  • FIG11 shows a cross-sectional view taken along line B-B in FIG3 , in which the ceramic cover and the frame are omitted, and the third magnetic conductor moves prior to the second magnetic conductor.
  • FIG. 12 shows a partial enlarged view of the Y portion in FIG. 11 .
  • FIG. 13 shows a side view of FIG. 2 , wherein the third magnetic conductor moves prior to the second magnetic conductor.
  • FIG. 14 shows a partial enlarged view of the portion M in FIG. 2 .
  • FIG. 15 is a schematic diagram showing the first magnetic conductor being fixedly connected to the fixing frame.
  • FIG. 16 is an exploded schematic diagram showing a relay according to an embodiment of the present disclosure.
  • the reference numerals are described as follows: 10. contact container; 101. contact chamber; 102. first through hole; 103. second through hole; 11a. insulation cover; 11. Ceramic cover; 111. Top wall; 112. Side wall; 113. First metallization layer; 114. Second metallization layer; 12. Frame; 13. Yoke iron plate; 131. Third through hole; 20. Static contact lead-out terminal; 30. Connector; 31. First end of connector; 32. Second end of connector; 40. First magnetic conductor; 410. Magnetic conductor; 411. Opening; 50. Push rod assembly; 51. Rod; 52. Support seat; 521. Base; 522. Bracket; 523. Guide hole; 53. Moving contact assembly; 54. Moving reed; 55. Second magnetic conductor; 551.
  • FIG. 16 is an exploded schematic diagram of a relay according to an embodiment of the present disclosure.
  • the relay includes a housing 1100 , an electromagnet unit 1200 , an arc extinguishing unit 1300 , and a sealing unit 1400 .
  • the sealing unit 1400 is disposed on the housing 1100 .
  • the top of the static contact lead-out terminal of the sealing unit 1400 is exposed to the outer surface of the housing 1100 through the exposure hole 1130 of the housing 1100.
  • the electromagnet unit 1200 and the arc extinguishing unit 1300 are both arranged in the housing 1100.
  • the housing 1100 includes a first shell 1110 and a second shell 1120 , which are snap-connected to form a chamber for accommodating the electromagnet unit 1200 , the arc extinguishing unit 1300 , and the sealing unit 1400 .
  • the arc extinguishing unit 1300 is used to extinguish the arc generated between the static contact lead-out terminal of the sealing unit 1400 and the moving reed.
  • the arc extinguishing unit 1300 includes two arc extinguishing magnets 1310.
  • the arc extinguishing magnets 1310 may be permanent magnets, and each arc extinguishing magnet 1310 may be substantially rectangular.
  • the two arc extinguishing magnets 1310 are respectively disposed on both sides of the sealing unit 1400 and are disposed opposite to each other along the length direction D2 of the movable spring piece.
  • a magnetic field can be formed around the static contact lead-out terminal and the movable reed piece. Therefore, the arc generated between the static contact lead-out terminal and the movable reed piece will be elongated in a direction away from each other by the action of the magnetic field, thereby achieving arc extinguishing.
  • the arc extinguishing unit 1300 also includes two yoke iron clips 1320, and the two yoke iron clips 1320 are arranged corresponding to the positions of the two arc extinguishing magnets 1310.
  • the two yoke iron clips 1320 surround the sealing unit 1400 and the two arc extinguishing magnets 1310.
  • the yoke iron clips 1320 are made of soft magnetic materials. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.
  • Figure 1 shows a three-dimensional schematic diagram of the relay of the embodiment of the present disclosure, in which the housing, the electromagnet unit and the arc extinguishing unit are omitted.
  • Figure 2 shows a schematic diagram of Figure 1 without the ceramic cover and the frame.
  • Figure 3 shows a top view of Figure 1.
  • Figure 4 shows a cross-sectional view of A-A in Figure 3.
  • Figure 5 shows an exploded schematic diagram of Figure 1.
  • the relay of the embodiment of the present disclosure includes a contact container 10 , a pair of static contact lead terminals 20 , a first magnetic conductor 40 , a push rod assembly 50 , a movable contact assembly 53 and a third magnetic conductor 60 .
  • the contact container 10 has a contact chamber 101 therein.
  • the contact container 10 may include an insulating cover 11 a and a yoke plate 13 .
  • the insulating cover 11 a is disposed on one side surface of the yoke plate 13 .
  • the insulating cover 11 a and the yoke plate 13 together enclose the contact chamber 101 .
  • the insulating cover 11a includes a ceramic cover 11 and a frame sheet 12.
  • the ceramic cover 11 is connected to the yoke iron plate 13 through the frame sheet 12.
  • the frame sheet 12 can be a metal piece with an annular structure, such as an iron-nickel alloy, and one end of the frame sheet 12 is connected to the opening edge of the ceramic cover 11, for example, by laser welding, brazing, resistance welding, gluing, etc.
  • the other end of the frame sheet 12 is connected to the yoke iron plate 13, which can also be done by laser welding, brazing, resistance welding, gluing, etc.
  • a frame sheet 12 is arranged between the ceramic cover 11 and the yoke iron plate 13 to facilitate the connection.
  • the ceramic cover 11 includes a top wall 111 and a side wall 112. One end of the side wall 112 is connected to the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 13 through the frame sheet 12. In this embodiment, the other end of the side wall 112 is connected to the yoke plate 13 through the frame sheet 12.
  • the contact container 10 also has a pair of first through holes 102 and a second through hole 103, both of which are connected to the contact chamber 101.
  • the first through hole 102 is used for the static contact lead-out terminal 20 to pass therethrough
  • the second through hole 103 is used for a connector 30 to pass therethrough.
  • first through hole 102 and the second through hole 103 are both opened in the top wall 111 of the ceramic cover 11.
  • the second through hole 103 can be arranged between the two first through holes 102, that is, the connecting member 30 is arranged between a pair of static contact lead-out terminals 20.
  • the number of the second through holes 103 may be two, for two connecting members 30 to pass through, but the present invention is not limited thereto.
  • a pair of static contact lead-out terminals 20 are connected to the contact container 10, and at least a portion of each static contact lead-out terminal 20 is located in the contact chamber 101.
  • One of the pair of static contact lead-out terminals 20 serves as a terminal for current inflow, and the other serves as a terminal for current outflow.
  • a pair of static contact lead-out terminals 20 are disposed in a pair of first through holes 102 in a one-to-one correspondence, and are connected to the top wall 111 of the ceramic cover 11 , for example, by welding.
  • the bottom of the static contact lead-out terminal 20 serves as a static contact, and the static contact may be integrally or separately arranged at the bottom of the static contact lead-out terminal 20 .
  • the first magnetic conductor 40 is disposed in the contact chamber 101 and fixed relative to the contact container 10 .
  • the push rod assembly 50 is movably connected to the contact container 10 along the movement direction D1.
  • the push rod assembly 50 includes a rod portion 51 and a support seat 52.
  • the rod portion 51 is movable along the axial direction of the rod portion 51 relative to the contact container 10, and the support seat 52 is fixedly arranged at one end of the rod portion 51 along the axial direction and at least partially extends into the contact chamber 101.
  • the yoke plate 13 has a third through hole 131 which penetrates two opposite sides of the yoke plate 13 along the thickness direction of the yoke plate 13 and communicates with the contact chamber 101 of the contact container 10.
  • the rod 51 is axially movably disposed in the third through hole 131.
  • the moving contact assembly 53 is movable relative to the support seat 52 along the axial direction of the rod 51.
  • the moving contact assembly 53 includes a moving spring 54 and a second magnet 55.
  • the second magnet 55 is fixedly connected to the side of the moving spring 54 away from the first magnet 40. That is to say, along the thickness direction of the moving spring 54, the first magnet 40 is located on one side of the moving spring 54, and the second magnet 55 is located on the other side of the moving spring 54.
  • the second magnetic conductor 55 and the movable spring piece 54 may be fixed to each other by riveting, but the present invention is not limited thereto.
  • the two ends of the moving spring 54 are used to contact the bottom of a pair of static contact lead-out terminals 20 to achieve contact closure.
  • the two ends of the moving spring 54 along its length direction D2 can serve as moving contacts.
  • the moving contacts at the two ends of the moving spring 54 can protrude from other parts of the moving spring 54, or can be flush with other parts.
  • the moving contact can be integrally or separately arranged on the moving spring piece 54 along the length direction D2 thereof. Both ends.
  • the third magnetic conductor 60 is connected to the support seat 52 and is located on the side of the movable spring 54 away from the first magnetic conductor 40, and is movably disposed in the contact chamber 101 along the axial direction of the rod 51.
  • a second magnetic circuit can be formed between the third magnetic conductor 60 and the first magnetic conductor 40.
  • the first magnetic conductor 40 is located on one side of the movable spring 54, and the second magnetic conductor 55 and the third magnetic conductor 60 are located on the other side of the movable spring 54.
  • a second magnetic conductive loop can be formed between the first magnetic conductor 40 and the third magnetic conductor 60, and then a magnetic attraction force is generated between the first magnetic conductor 40 and the third magnetic conductor 60.
  • first magnetic conductor 40 the second magnetic conductor 55 and the third magnetic conductor 60 can all be made of materials such as iron, cobalt, nickel, and alloys thereof.
  • the first magnetic conductor 40 may be in a straight line shape, and the second magnetic conductor 55 and the third magnetic conductor 60 may be in a U shape, but the present invention is not limited thereto.
  • first magnetic conductor 40, the second magnetic conductor 55 and the third magnetic conductor 60 can be designed to include a plurality of stacked magnetic conductor sheets as required.
  • the second magnetic conductor 55 surrounds the bottom surface and two opposite side surfaces of the movable spring piece 54
  • the third magnetic conductor 60 is arranged on the side of the second magnetic conductor 55 away from the movable spring piece 54, and can surround the bottom surface and two opposite side surfaces of the second magnetic conductor 54, but is not limited to this.
  • the third magnetic conductor 60 moves in a direction away from the first magnetic conductor 40 before the second magnetic conductor 55 .
  • the movable contact assembly 53 is movable relative to the support base 52 along the axial direction of the rod 51 between a first position close to the static contact lead-out terminal 20 and a second position away from the static contact lead-out terminal 20.
  • the relay further includes a first elastic member 56, which is disposed between the support base 52 and the movable contact assembly 53 and is used to apply an elastic force to the movable contact assembly 53 toward the first position.
  • first position and second position in which the movable contact assembly 53 is movable between the first position and the second position along the axial direction of the rod portion 51 relative to the support seat 52 refer to the relative positions of the movable contact assembly 53 and the support seat 52 .
  • the electromagnet unit 1200 when the electromagnet unit 1200 is energized, it can drive the rod 51, the support seat 52 and the moving contact assembly 53 to move toward the static contact lead-out terminal 20. After the moving contact assembly 53 contacts the static contact lead-out terminal 20, the moving contact assembly 53 is stopped by the static contact lead-out terminal 20, while the rod 51 and the support seat 52 continue to move upward until the overtravel process is completed. During the overtravel process, relative movement occurs between the moving contact assembly 53 and the support seat 52.
  • the support base 52 will move upward relative to the movable contact assembly 53. If the movable contact assembly 53 is defined as stationary during the overtravel process, the movable contact assembly 53 will move downward relative to the support base 52.
  • the movable contact assembly 53 is located at the first position relative to the support base 52, that is, the movable contact assembly 53 is close to the static contact lead-out terminal 20 relative to the support base 52.
  • the movable contact assembly 53 moves downward relative to the support base 52, that is, the movable contact assembly 53 moves relative to the support base 52 in a direction away from the static contact lead-out terminal 20, until the movable contact assembly 53 moves to the second position relative to the support base 52.
  • the overtravel is completed. At this time, the compression amount of the first elastic member 56 is at the maximum value.
  • the electromagnet unit 1200 When the electromagnet unit 1200 is powered off, it can drive the rod 51 and the support seat 52 to move together in a direction away from the static contact lead-out terminal 20. Before the overtravel is completed, the static contact assembly 53 is still in contact with the static contact lead-out terminal 20, and the moving contact assembly 53 starts to move from the second position to the first position relative to the support seat 52. When the overtravel is completed, the moving contact assembly 53 starts to separate from the static contact lead-out terminal 20 driven by the support seat 52. At the same time, the moving contact assembly 53 moves from the second position to the first position relative to the support seat 52.
  • the first elastic member 56 may be a spring, but is not limited thereto.
  • the second magnetic conductor 55 has an opening 551, and the opening 551 passes through two opposite side surfaces of the second magnetic conductor 55 along the thickness direction of the second magnetic conductor 55. Through the opening 551, part of the bottom surface of the movable spring piece 54 is exposed to the second magnetic conductor 55.
  • One end of the first elastic member 56 abuts against the support seat 52, and the other end passes through the opening 551 and abuts against the bottom surface of the movable spring piece 54 of the movable contact assembly 53.
  • the third magnetic conductor 60 has a through hole 610 , and the first elastic member 56 is disposed through the through hole 610 .
  • the movable contact assembly 53 is movably connected to the support base 52 via a limiting structure 80 , and the limiting structure 80 is used to limit the movable contact assembly 53 from moving between a first position and a second position relative to the support base 52 .
  • the limiting structure 80 includes a limiting groove 810 and a limiting block 820.
  • the limiting groove 810 is provided on one of the moving contact assembly 53 and the support seat 52, and the limiting groove 810 extends along the axial direction of the rod 51.
  • the limiting block 820 is provided on the other of the moving contact assembly 53 and the support seat 52, and the limiting block 820 and the limiting groove 810 can be slidably matched.
  • the limit block 820 is formed on the movable contact assembly 53, and the limit groove 810 is formed on the support seat 52. Specifically, the limit block 820 can be formed on the second magnetic conductor 55 or the movable spring 54 of the movable contact assembly 53.
  • the limiting block 820 may also be formed on the support seat 52 , and the limiting groove 810 may be formed on the moving contact assembly 53 .
  • the size of the limit groove 810 presents a "one end large and the other end small” structure. Therefore, when the moving contact assembly 53 moves from the first position to the second position relative to the support seat 52, the gap between the limit block 820 and the side wall of the limit groove 810 becomes larger, which can prevent the limit block 820 from rubbing and jamming with the groove wall of the limit groove 810.
  • the groove wall of the limiting groove 810 has a stop wall 811 at one end close to the static contact lead-out terminal 20.
  • the stop wall 811 stops at the limiting block 820.
  • the support base 52 includes a base 521 and a bracket 522.
  • the base 521 is connected to one end of the rod 51 along the axial direction, and the bracket 522 is connected to the base 521.
  • One end of the first elastic member 56 abuts against the base 521, and the other end abuts against the moving contact assembly 53.
  • a limiting block 820 or a limiting groove 810 may be provided on the bracket 522 .
  • the third magnetic conductor 60 has a protrusion 620
  • the support seat 52 has a guide hole 523 , which extends along the axial direction of the rod 51 .
  • the protrusion 620 extends into the guide hole 523 .
  • the relay further includes a second elastic member 57 , which is disposed between the third magnetic conductor 60 and the support seat 52 and is used to apply an elastic force to the third magnetic conductor 60 to move toward the movable contact assembly 53 .
  • the second elastic member 57 can be a spring, one end of which abuts against the base 521 , and the other end abuts against the third magnetic conductor 60 , so that the protrusion 620 of the third magnetic conductor 60 can always abut against the upper edge of the guide hole 523 .
  • the third magnetic conductor 60 and the support seat 52 can also be fixedly connected by a snap-fit structure.
  • the third magnetic conductor 60 is fixedly snap-fitted with the bracket 522 of the support seat 52.
  • the support seat 52 can drive the third magnetic conductor 60 to move together.
  • the sealing unit 1400 further includes a metal cover 1410, which is connected to the side of the yoke plate 13 facing away from the insulating cover 11a, and the metal cover 1410 covers the third through hole 131 on the yoke plate 13.
  • the metal cover 1410 and the yoke plate 13 enclose a chamber for accommodating the static iron core and the moving iron core 1240 of the electromagnet unit 1200, which will be described in detail below.
  • the electromagnet unit 1200 includes a coil frame 1210, a coil 1220, a static iron core, a moving iron core 1240 and a reset member 1250.
  • the coil frame 1210 is in a hollow cylindrical shape and is formed of an insulating material.
  • the metal cover 1410 is inserted into the coil frame 1210.
  • the coil 1220 surrounds the coil frame 1210.
  • the static iron core is fixedly arranged in the metal cover 1410, and part of the static iron core extends into the third through hole 131.
  • the static iron core has a perforation, which is arranged corresponding to the position of the third through hole 131 for the rod 51 to pass therethrough.
  • the moving iron core 1240 is movably arranged in the metal cover 1410 and arranged opposite to the static iron core.
  • the moving iron core 1240 is connected to the rod 51, and is used to be attracted by the static iron core when the coil 1220 is energized.
  • the moving iron core 1240 and the rod 51 can be connected by screwing,
  • the reset member 1250 is located inside the metal cover 1410 and is disposed between the static iron core and the moving iron core 1240 , and is used to reset the moving iron core 1240 when the coil 1220 is powered off.
  • the reset member 1250 can be a spring, and is sleeved on the outside of the rod 51 .
  • Figure 6 shows a cross-sectional view of A-A in Figure 3, wherein the ceramic cover and the frame are omitted, and the overtravel has been completed.
  • Figure 7 shows a cross-sectional view of B-B in Figure 3, wherein the ceramic cover and the frame are omitted, and the overtravel has been completed.
  • Figure 8 shows a partial enlarged view of X in Figure 7.
  • Figure 9 shows a side view of Figure 2, wherein the overtravel has been completed.
  • a first magnetic circuit is formed between the first magnet 40 and the second magnet 55, so a magnetic attraction is generated between the first magnet 40 and the second magnet 55.
  • a second magnetic circuit is formed between the third magnet 60 and the first magnet 40, so a magnetic attraction is generated between the third magnet 60 and the first magnet 40. Since the first magnet 40 is fixed relative to the contact container 10, when a short-circuit current is passed, a fixed anti-short-circuit structure is formed between the first magnet 40 and the second magnet 55 and between the third magnet 60 and the first magnet 40, and the holding force of the fixed anti-short-circuit structure is provided by the contact container 10. Under the premise of constant coil drive, the relay of the embodiment of the present disclosure effectively improves the upper limit of the anti-short-circuit current carrying capacity. It can be seen that the magnetic attraction of the first magnet 40 is shared by the second magnet 55 and the third magnet 60.
  • the distance D11 between the first magnetic pole surface 552 and the first magnetic conductor 40 is equal to the distance D12 between the second magnetic pole surface 630 and the first magnetic conductor 40 .
  • the second magnet 55 and the third magnet 60 share the magnetic attraction force of the first magnet 40 in a substantially equal manner while other factors (such as current size, magnet material/thickness) remain basically the same.
  • the thickness of the second magnetic conductor 55 is equal to the thickness of the third magnetic conductor 60.
  • the thickness of the second magnetic conductor 55 and the thickness of the third magnetic conductor 60 may also be different.
  • first magnetic pole surface 552 and the second magnetic pole surface 630 may not be flush.
  • first magnetic pole surface 552 is higher than the second magnetic pole surface 630
  • first magnetic pole surface 552 is lower than the second magnetic pole surface 630 .
  • the movable contact assembly 53 is in the second position relative to the support seat 52 , and at this time, the limit block 820 is spaced apart from the stop wall 811 of the limit groove 810 .
  • Figure 10 shows a cross-sectional view of A-A in Figure 3, wherein the ceramic cover and the frame are omitted, and the third magnetizer moves preferentially over the second magnetizer.
  • Figure 11 shows a cross-sectional view of B-B in Figure 3, wherein the ceramic cover and the frame are omitted, and the third magnetizer moves preferentially over the second magnetizer.
  • Figure 12 shows a partial enlarged view of Y in Figure 11.
  • Figure 13 shows a side view of Figure 2, wherein the third magnetizer moves preferentially over the second magnetizer.
  • Figures 10 to 13 show the state in which the third magnetic conductor moves before the second magnetic conductor during the disconnection process between the movable spring 54 and the static contact lead-out terminal 20.
  • the movable contact assembly 53 can be considered to be in the first position relative to the support seat 52.
  • the support seat 52 of the push rod assembly 50 can first drive the third magnet 60 to move along the axial direction of the rod portion 51 in the direction away from the first magnet 40, that is, the third magnet 60 moves in the direction away from the first magnet 40 before the second magnet 55.
  • the magnetic attraction force of the first magnetic conductor 40 is distributed to the second magnetic conductor 55 and the third magnetic conductor 60 , a portion of the magnetic attraction force exists between the first magnetic conductor 40 and the third magnetic conductor 60 .
  • the breaking force only needs to overcome a part of the magnetic attraction between the third magnetizer 60 and the first magnetizer 40.
  • the magnetic spacing between the third magnetizer 60 and the first magnetizer 40 gradually increases, and then the magnetic attraction between the third magnetizer 60 and the first magnetizer 40 further decreases.
  • the movable contact assembly 53 can be regarded as moving from the second position to the first position relative to the support seat 52 .
  • the moving contact assembly 53 moves to the first position. Afterwards, the support seat 52 drives the moving contact assembly 53 (including the moving spring 54 and the second magnet 55) to move in a direction away from the first magnet 40. Since the third magnet 60 has moved in a direction away from the first magnet 40 before the second magnet 55, and the magnetic spacing between the third magnet 60 and the first magnet 40 gradually increases, when the moving contact assembly 53 moves in a direction away from the first magnet 40, the breaking force basically only needs to overcome the magnetic attraction between the second magnet 55 and the first magnet 40 to complete the breaking of the moving spring 54 and the static contact lead-out terminal 20.
  • the second magnet 55 and the third magnet 60 are located on the side of the moving spring 54 away from the first magnet 40.
  • an anti-short-circuit structure is formed between the first magnet 40 and the second magnet 55, and between the third magnet 60 and the first magnet 40, which effectively improves the upper limit of the anti-short-circuit current carrying capacity.
  • the third magnet 60 moves in a direction away from the first magnet 40 before the second magnet 55. This hierarchical disconnection method is more conducive to completing the disconnection. Therefore, the relay of the embodiment of the present disclosure can meet the requirements of extreme disconnection on the basis of ensuring the anti-short-circuit capability.
  • the relay of the embodiment of the present disclosure further includes a connector 30 , which is passed through the second through hole 103 and includes a first end 31 and a second end 32 , wherein the first end 31 is connected to the contact container 10 , and the second end 32 is connected to the first magnetic conductor 40 .
  • the first magnetic conductor 40 is connected to the contact container 10 through the connecting piece 30, but is not directly connected to the contact container 10, so that the connection process is unobstructed and visible, which is convenient for operation and ensures the reliability of the connection.
  • first through hole 102 and the second through hole 103 are both formed on the top wall 111 of the ceramic cover 11 , and the first end 31 of the connecting member 30 is connected to the outer wall surface of the top wall 111 .
  • a first metallization layer 113 is provided at the periphery of the first through hole 102, and a second metallization layer 114 is provided at the periphery of the second through hole 103.
  • the static contact lead-out terminal 20 is welded to the top wall 111 through the first metallization layer 113, and the first end 31 of the connector 30 is welded to the top wall 111 through the second metallization layer 114.
  • the outer wall surface of the top wall 111 of the ceramic cover 11 is easier to form a welding plane.
  • a metallization layer also needs to be provided on the periphery of the first through hole 102, so when processing the first metallization layer 113 of the first through hole 102, the second metallization layer 114 of the second through hole 103 is processed at the same time.
  • the metallization layer can be processed only on the outer wall surface of the top wall 111, without processing the metallization layer on the inner wall surface of the top wall 111, which is convenient for processing and simplifies the processing steps.
  • the first magnetic conductor 40 is spaced apart from the inner wall surface of the top wall 111.
  • the first magnetic conductor 40 is spaced apart from the inner wall surface of the top wall 111, so that there is a gap between the first magnetic conductor 40 and the inner wall surface of the top wall 111. Since the first magnetic conductor 40 is not in direct contact with the inner wall surface of the top wall 111, the provision of the first magnetic conductor 40 does not affect the creepage distance of the pair of static contact lead-out terminals 20.
  • the top wall 111 and the side wall 112 are separate structures and are connected by welding.
  • the ceramic cover 11 as a split structure of the top wall 111 and the side wall 112, it is more convenient to connect the connector 30 to the top wall 111.
  • the top wall 111 and the side wall 112 can also be bonded.
  • the sheet structure makes it easier to process the first through hole 102, the second through hole 103, the first metallization layer 113, and the second metallization layer 114 on the top wall 111. Furthermore, the sheet structure also makes it easier to weld the connector 30 and the top wall 111, and the static contact lead-out terminal 20 and the top wall 111.
  • top wall 111 and the side wall 112 may also be an integral structure.
  • the first magnetic conductor 40 includes a plurality of stacked magnetic conductive sheets 41 connected to the second end 32 of the connector 30.
  • Each magnetic conductive sheet 41 has an opening 411, and the connector 30 is inserted through the opening 411 and riveted to the bottommost magnetic conductive sheet 41.
  • the opening 411 of the bottom magnetic conductive sheet 41 can also be a blind hole, while the openings 411 of the remaining magnetic conductive sheets 41 are through holes.
  • the connecting member 30 is inserted through each opening 411 of the remaining magnetic conductive sheets 41, and the second end of the connecting member 30 extends into the blind hole of the bottom magnetic conductive sheet 41 and is welded to the magnetic conductive sheet 41.
  • the first magnetic conductor 40 is a single piece, the first magnetic conductor 40 is provided with an opening 411, which can be a through hole or a blind hole.
  • the opening 411 is a through hole, the connector 30 passes through the opening 411 and is riveted to the first magnetic conductor 40.
  • solder can be provided in the blind hole, and the second end 32 of the connector 30 extends into the blind hole and is welded to the first magnetic conductor 40.
  • the thickness of the first magnetizer 40 needs to be increased to generate a greater magnetic attraction, thereby ensuring that the magnetic attraction between the first magnetizer 40 and the second magnetizer 55 and the first magnetizer 40 and the third magnetizer 60 can overcome the repulsion generated by the short-circuit current and prevent the movable spring 54 from bouncing off the static contact lead-out terminal 20.
  • the first magnetizer 40 with a larger thickness is more expensive and more difficult to connect to the ceramic cover 11.
  • the first magnetic conductor 40 since the first magnetic conductor 40 is connected to the contact container 10 through the connecting member 30, the first magnetic conductor The body 40 may include a plurality of stacked magnetic conductive sheets 41, and the plurality of magnetic conductive sheets 41 are connected by the second through holes 103 provided by the connector 30, and the overall thickness of the first magnetic conductive body 40 is increased by increasing the number of thinner magnetic conductive sheets 41.
  • the magnetic conductive sheets 41 are thinner and can be made of thin strips, so the material cost is low and easy to operate.
  • the number of magnetic conductive sheets 41 can be flexibly adjusted according to the size of the short-circuit current.
  • FIG. 15 is a schematic diagram showing that the first magnetic conductor is fixedly connected to the fixing frame.
  • the first magnetic conductor 40 is fixedly arranged relative to the contact container 10.
  • the first magnetic conductor 40 can also be fixedly connected to a fixing frame 70.
  • the relay further includes a fixing frame 70, which is disposed in the contact chamber 101 and fixedly connected to the yoke iron plate 13. The first magnetic conductor 40 is fixedly connected to the fixing frame 70.
  • the terms “first”, “second” and “third” are only used for descriptive purposes and should not be understood as indicating or implying relative importance; the terms “a pair” and “one” are only used to introduce technical features and should not be understood as limiting the specific quantity of the technical features, unless otherwise clearly defined; the term “multiple” refers to two or more, unless otherwise clearly defined.
  • Terms such as “installed”, “connected”, “connected”, and “fixed” should be understood in a broad sense. For example, “connected” can be a fixed connection, a detachable connection, or an integral connection; “connected” can be a direct connection or an indirect connection through an intermediate medium.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Contacts (AREA)

Abstract

Relais comprenant : un contenant de contact (10), qui comprend une chambre de contact (101) ; une paire d'extrémités de sortie de contact fixes (20), qui sont reliées au contenant de contact (10) ; un premier conducteur magnétique (40), qui est agencé de manière fixe ; un ensemble tige de poussée (50) ; un ensemble contact mobile (53) ; et un troisième conducteur magnétique (60). L'ensemble tige de poussée (50) comprend une partie tige (51), et une surface de support (52) agencée à une extrémité de la partie tige (51), la surface de support (52) s'étendant au moins partiellement dans la chambre de contact (101) ; et l'ensemble contact mobile (53) comprend un ressort de contact mobile (54) et un deuxième conducteur magnétique (55), le deuxième conducteur magnétique (55) étant fixé sur le côté du ressort de contact mobile (54) à l'opposé du premier conducteur magnétique (40). Le troisième conducteur magnétique (60) est relié à la surface de support (52) et est agencé de manière mobile dans la chambre de contact (101). Dans le processus de rupture du ressort de contact mobile (54) à partir des extrémités de sortie de contact fixes (20), le troisième conducteur magnétique (60) se déplace de préférence sur le deuxième conducteur magnétique (55). Le relais améliore les performances de rupture et la résistance au court-circuit.
PCT/CN2023/123423 2022-10-12 2023-10-08 Relais WO2024078421A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202211249001.0 2022-10-12
CN202211249001.0A CN117912900A (zh) 2022-10-12 2022-10-12 继电器

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WO2024078421A1 true WO2024078421A1 (fr) 2024-04-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012199122A (ja) * 2011-03-22 2012-10-18 Panasonic Corp リレー装置
CN216528650U (zh) * 2021-12-01 2022-05-13 昆山国力源通新能源科技有限公司 抗短路电流触头结构
CN217158052U (zh) * 2022-04-19 2022-08-09 厦门宏发电力电器有限公司 继电器
CN218385043U (zh) * 2022-10-12 2023-01-24 厦门宏发电力电器有限公司 继电器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012199122A (ja) * 2011-03-22 2012-10-18 Panasonic Corp リレー装置
CN216528650U (zh) * 2021-12-01 2022-05-13 昆山国力源通新能源科技有限公司 抗短路电流触头结构
CN217158052U (zh) * 2022-04-19 2022-08-09 厦门宏发电力电器有限公司 继电器
CN218385043U (zh) * 2022-10-12 2023-01-24 厦门宏发电力电器有限公司 继电器

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