EP2924701A1 - Bloc de rehausse d'un appareil de commutation basse tension - Google Patents

Bloc de rehausse d'un appareil de commutation basse tension Download PDF

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Publication number
EP2924701A1
EP2924701A1 EP14162038.5A EP14162038A EP2924701A1 EP 2924701 A1 EP2924701 A1 EP 2924701A1 EP 14162038 A EP14162038 A EP 14162038A EP 2924701 A1 EP2924701 A1 EP 2924701A1
Authority
EP
European Patent Office
Prior art keywords
contact
attachment block
armature
movement
low
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP14162038.5A
Other languages
German (de)
English (en)
Other versions
EP2924701B1 (fr
Inventor
Michael Schmid
Bernhard Streich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP14162038.5A priority Critical patent/EP2924701B1/fr
Priority to CN201520123740.4U priority patent/CN204596718U/zh
Publication of EP2924701A1 publication Critical patent/EP2924701A1/fr
Application granted granted Critical
Publication of EP2924701B1 publication Critical patent/EP2924701B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts

Definitions

  • the invention relates to an attachment block for a low-voltage switchgear comprising an electromagnetic drive with a fixed yoke and a relative to the yoke movable armature and a switch contact whose contacts are closed and opened by a movement of the armature along an axis.
  • a reduction of the switching noise is possible for example by a reduction of the turn-on voltage by means of an electronic circuit.
  • the electronic circuit can be switched between a control supply voltage and a coil of the electromagnetic drive.
  • To turn on the low-voltage switchgear only the so-called. Undervoltage, ie the lowest permitted supply voltage, is applied to the coil. Once the contacts of the switch contact are closed, the voltage is increased to ensure the required high contact force.
  • a disadvantage of this procedure is that the switch-on time of the Low-voltage switching device is disadvantageously increased.
  • an attachment block for a low-voltage switchgear is proposed, wherein the low-voltage switchgear is an electromagnetic drive with a fixed yoke and an armature movable relative to the yoke and a switch contact whose contacts are closable and openable by a movement of the armature along an axis , includes.
  • the attachment block comprises a means for damping motion, which presses the armature movement in a closing operation of the switch contact by a movement of the armature in the direction of the yoke, as soon as a contact contact of the contacts of the switch contact is given.
  • the means for damping movement is preferably arranged in a separately provided from the low-voltage switchgear attachment block, so that conventional low-voltage switchgear can be improved by the attachment of a corresponding attachment block in terms of noise.
  • the means for damping motion of the noise level will be adjusted by the design of the means for damping motion of the noise level. Furthermore, influencing the frequency spectrum of the switching noise is possible.
  • the means for damping movement may comprise a damping plate and a number of abutments, wherein the damping plate abuts the number of abutments as soon as the contact contact of the contacts is given.
  • the damping plate and the number of abutment are arranged to each other such that a concern of the damping plate on the number of thrust bearings takes place only when the contact contact of the contacts of the switch contact is given. Due to the properties of the damping plate during the further switch-on process, it is ensured that the closing operation of the electric drive system is delayed in time.
  • the damping plate may be mechanically coupled or coupled to the armature. This ensures that the damping plate follows the movement of the armature in the direction of the yoke.
  • the damper plate may be coupled to an axially extending shank which is mechanically connected to a contact carrier of the low voltage switchgear when the attachment block is mechanically connected to the low voltage switchgear and follows the movement of the armature.
  • the shaft of the attachment block thus represents an extension of a likewise present in the form of a shank contact carrier of the low-voltage switchgear.
  • the mechanical connection between the shaft and the contact carrier can be force and / or positive fit. In practice, it can be provided to produce the mechanical connection between these two components by means of a snap connection.
  • the damping plate may be coupled via a Wegausretesfeder with the shaft. hereby can be ensured that the damping plate always rests on the number of thrust bearing as soon as the contact contact of the contacts is given.
  • the damping plate is elastically deformable from the contact contact by the movement of the armature and the system to the number of stationary counter bearings. As a result, the speed is braked by the movable damping plate in the attachment block until the armature and the yoke of the electric drive system meet. Due to the reduced impact energy with the same moving mass then the noise of the low-voltage switching device or the electromagnetic drive is limited to a minimum.
  • the damping plate may consist of a reversibly deformable, elastic plastic or a metal.
  • the number of counter bearings can consist of a plastic or a metal.
  • a plane in which respective impact surfaces of the number of abutments are arranged can be variably aligned in the axial direction.
  • the plane is perpendicular to the above-mentioned axis, along which the movable armature moves towards the fixed yoke.
  • the elasticity of the damping plate is adjustable by the position of the number of thrust bearings.
  • the number of thrust bearings can be adjusted, for example in the manner of adjusting screws by a rotation in the axial direction. It is understood that the axial adjustment of the number of abutments is uniform, so that their impact surfaces are always in the common plane, which is perpendicular to the axis of motion, lie.
  • the axial displacement thus allows influencing the bending elasticity of the damping plate.
  • the noise level and the frequency spectrum of the switching noise can be influenced. These significantly influence the switching sensation of people in the vicinity of the low-voltage switchgear.
  • the means for damping movement comprise a spring, wherein the spring is first loaded against its spring force, as soon as the contact contact of the contacts is given.
  • the spring may be provided alternatively or in addition to the damping plate described above and the number of abutments in the attachment block.
  • the spring is arranged in the attachment block in such a way that it is not subjected to any counterforce before the contacts are in contact. Thereby, a maximum damping of the closing operation of the electric drive system can be achieved.
  • the spring may be disposed in the shaft extending in the axial direction or about the shaft, which is mechanically connected to a contact carrier of the low-voltage switchgear in an attachment block mechanically connected to the low-voltage switchgear and follows the movement of the armature.
  • the spring when it is arranged around the shaft, can be supported on a housing wall adjoining the low-voltage switching device.
  • a low-voltage switching device which comprises a base unit with an electromagnetic drive with a fixed yoke and an armature movable relative to the yoke, and a switching contact whose contacts are moved by a movement of the armature along a Axle closable and openable, and comprises a block attachment according to the manner described above.
  • the attachment block and the base unit can be two separable components.
  • the attachment block can also be an integral part of the basic device.
  • the low-voltage switchgear 1 comprises a basic unit 10 with the components required for a switching operation and an attachable to the base unit 10 essay block 30.
  • the functionality described below of the attachment block 30 could also be an integral part of Basic device 10 be.
  • the variant described below has the advantage that standardized basic equipment 10 can be subsequently provided with the separate, inventive attachment block 30 in order to achieve an improvement in terms of switching noise.
  • the electromagnetic drive 11 consists of a fixed yoke 12 with a coil 13 and a relative to the yoke 12 movable armature 14.
  • the armature 14 is along an axis (so-called. Movement axis) movable in the plane of the drawing vertically from top to bottom.
  • the basic unit 10 further comprises a switching contact 15, which can be switched by a movement of the armature 14 between a position "open” and a position "closed".
  • the switching contact 15 comprises a first and a second fixed contact piece 16, 18 and a movable contact piece 20.
  • the first and the second fixed contact piece 16, 18 and the movable contact piece 20 extend in planes perpendicular to the axis of movement of the armature.
  • the movable contact piece 20 and the armature 14 are arranged on a shaft-shaped contact carrier 23, which extends in the direction of the axis of movement of the armature 14.
  • the fixed contact pieces 16, 18 and the movable contact piece 20 have contact surfaces 17, 19, 21, 22, wherein at a contact contact of the contact surfaces 17, 21 and the contact surfaces 19, 22, a current from the first Festschalt Faculty 16 via the movable contact piece 20 and second fixed contact 18 can flow. A current flow is possible as soon as a contact contact of the contact surfaces 17, 19, 21, 22 is given.
  • the attachment block 30, which in the Fig. 1 to Fig. 3 mechanically connected to the base unit 10, preferably releasably, comprises a shaft 31 which can be moved in the direction of the axis of movement of the armature 14 or of the contact carrier 23.
  • the shaft 31 is arranged in the attachment block 30 in such a way that it extends to the contact carrier 23 of the basic device 10 is formed. More precisely, a free end 43 of the shaft 31 adjoins an end 25, remote from the armature 14, of the contact carrier 23.
  • These can be coupled to one another, for example, via a latching or snap connection (not shown).
  • a damping plate 33 is mechanically coupled.
  • the damping plate 33 may be fixedly connected to the shaft 31.
  • the damping plate can also, as in the Fig. 1 to Fig. 3 is shown coupled via a Wegausretesfeder 42 with the shaft 31.
  • the Wegausretesfeder 42 as shown schematically in the Fig. 1 to Fig. 3 is shown to be arranged inside the shaft 31. It can also be arranged around the shaft 31.
  • the Wegaus Sammlungsfeder 42 is supported on a Nederlager 44 of the shaft 31, which is the free end 43 opposite.
  • the damping plate 33 forms, together with a number of abutments 35, 38, a means 32 for damping movement.
  • the damping plate 33 is formed from an elastic, reversibly deformable plastic or metal.
  • the abutment 35, 38 in particular their impact surfaces 35, 39 made of an elastic plastic or a metal. Is the switching contact 15 in the "open" position ( Fig. 1 ), so respective impact surfaces 36, 39 of the abutment 35, 38 are arranged at a defined distance from the damping plate 33.
  • the impact surfaces 36, 39 lie in a common plane, which extends perpendicular to the axis of movement of the shaft 31, the contact carrier 33 and the armature 14.
  • abutments 35, 38 are shown.
  • the number of counter bearings could also be chosen larger.
  • the abutments 35, 38 are arranged in a perpendicular to the axis of movement wall 41 of the attachment block 30.
  • the abutments 35, 38 can be adjusted in the axial direction, so that the distance between the impact surfaces lying in a plane 36, 39 and the damping plate 33 is adjustable.
  • the counter-bearings 35, 38 can this have the manner of a screw on an external thread, which engages in a corresponding internal thread of recesses of the wall 41.
  • grooves 37, 40 of the abutment 35, 38 can be adjusted by rotation, for example by means of a screwdriver before the connection of the attachment block 30 with the base support 10, the axial distance in the desired manner.
  • a spring 34 may be provided in the attachment block, which is supported on an abutment 45.
  • the non-bearing 45 may be formed, for example, by a housing wall of the attachment block 30 adjoining the basic device 10.
  • the armature movement is braked by a movement of the armature 14 in the direction of the yoke 12 by excitation of the coil 13 as soon as a contact contact of the contact surfaces 17, 19, 21, 22 of the switching contact 15 given is. Due to the elasticity of the movement damping means or means 32, the firing process of the electromagnetic drive 11 is thus delayed.
  • the switching noise can be significantly reduced, without affecting the switching speed of the low-voltage switchgear 1 is adversely affected.
  • the reason for this is that, until contact contact of the contact surfaces 17, 19, 21, 22, movement of the armature 14 in the direction of the yoke is not influenced by the movement damping means or means 32. Only with the contact contact or the means 32 for damping movement are active and reduce the speed of the armature 14 in the direction of the yoke 12. This is readily apparent from the schematic representations of Fig. 1 to Fig. 3 seen.
  • Fig. 1 is the low-voltage switchgear 1 off, ie, the switch contact 15 is open.
  • the armature 14 is spaced from the yoke 12, the contact surfaces 17, 19, 21, 22 do not touch and between the impact surfaces 36, 39 of the abutment 35, 38 is given a distance to the damping plate 33.
  • the distance between the impact surfaces 36, 39 and the damping plate 33 corresponds to the distance between the contact surfaces 17 and 21 and 19 and 22 of the contact pieces 16, 18 and 20th
  • Fig. 2 shows the low-voltage switching device 1 after applying a control supply voltage to the coil 23, through which the armature 14 is attracted by the yoke 12.
  • a contact contact between the surface contacts 17 and 21 and the surface contacts 19 and 22 of the contact pieces 16, 18 and 20 takes place.
  • the damping plate 33 adjoins the impact surfaces 36, 39 of the abutments 35, 38.
  • the overall system consisting of the shaft 31, the contact carrier 23 and the armature 14 speed up to a contact contact of the contact surfaces 17, 19, 21, 22 of the contact pieces 16, 18, 20 is present.
  • the contact carrier spring 24 is not yet compressed at this moment.
  • the Wegaus GmbHsfeder 42 ensures that the damping plate 33 at the impact surfaces 36, 39 of the abutment 35, 38 rests, but without generating a significant force.
  • the additional existing spring 34 which is an additional or independent means 32 for motion damping, also not yet compressed.
  • the elastic damping plate 33 is matched in terms of its modulus of elasticity to the prevailing forces in the base unit 10. This affects the length, thickness and material of the damping element 33. This allows for a sound-optimized, gentle turn-on.
  • the exact configuration of the damping element 33 and / or the spring force of the acting as a brake spring 34 can be found by simulations and / or experiments.
  • the Embodiment depends essentially on the type and / or the design of the electromagnetic drive 11.
  • the bending stress of the damping element 33 must be smaller by a safety factor than the bending limit of the selected material of the damping element 33. After the switching process, the material must return to its original state. Since the modulus of elasticity of the damping element 33 is temperature-dependent and decreases with increasing temperature (the material thus becomes more elastic), this must be taken into account in the design of the material and the dimensioning.
  • Due to the axial adjustability of the abutment 35, 38 can by adjusting the distance between the impact surfaces 36, 39 and the damping element 33 in the off state according to Fig. 1 the bending elasticity of the damping element 33 are influenced. This makes it possible to influence the noise level and the frequency spectrum of the switching noise. This can then be determined according to the application of the low-voltage switchgear 1.
  • Fig. 4 shows a velocity-displacement diagram (vs diagram), wherein a first curve K1 is shown by a solid line and a second curve K2 by a dashed line.
  • the curve K1 shows the speed-distance curve of a low-voltage switchgear according to the invention, while the curve K2 represents the speed-path curve of a conventional low-voltage switchgear without the attachment block as described above.
  • Position A corresponds to the "open" position, as in Fig. 1 is shown.
  • the curves K1 and K2 run in unison.
  • the position is "closed” according to Fig. 3 achieved, with the speed in the position C of a low-voltage switching device according to the invention is considerably smaller than the position C 'in a conventional low-voltage switching device.
  • the low-voltage switching device is in the closed state, ie current can flow via the switching contacts. In this state, the switching contacts are static, ie the speed is 0.
  • the low-voltage switching device undergoes a higher mechanical bias, which is noticeable when switching off by a higher turn-off compared to a conventional low-voltage switchgear.
  • a limiter device comprising a freewheeling diode system to capture a mutual inductance may be provided. This makes it possible to reduce the turn-off noise by the Ausschaltanschlag to a minimum.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Electromagnets (AREA)
EP14162038.5A 2014-03-27 2014-03-27 Bloc de rehausse d'un appareil de commutation basse tension Active EP2924701B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14162038.5A EP2924701B1 (fr) 2014-03-27 2014-03-27 Bloc de rehausse d'un appareil de commutation basse tension
CN201520123740.4U CN204596718U (zh) 2014-03-27 2015-03-03 用于低电压开关设备的顶盖块和低电压开关设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14162038.5A EP2924701B1 (fr) 2014-03-27 2014-03-27 Bloc de rehausse d'un appareil de commutation basse tension

Publications (2)

Publication Number Publication Date
EP2924701A1 true EP2924701A1 (fr) 2015-09-30
EP2924701B1 EP2924701B1 (fr) 2016-10-19

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Application Number Title Priority Date Filing Date
EP14162038.5A Active EP2924701B1 (fr) 2014-03-27 2014-03-27 Bloc de rehausse d'un appareil de commutation basse tension

Country Status (2)

Country Link
EP (1) EP2924701B1 (fr)
CN (1) CN204596718U (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111584258A (zh) * 2019-02-19 2020-08-25 北海市深蓝科技发展有限责任公司 一种设置阻尼块抑制触点吸合冲击力的减少抖动触头结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660355A1 (fr) * 1993-12-22 1995-06-28 Fuji Electric Co., Ltd. Structure de maintien du noyau de fer d'un contacteur électromagnétique
US20070069840A1 (en) * 2005-09-26 2007-03-29 Denso Corporation Solenoid switch having moving contact configured to prevent contact bounce
DE102011081013A1 (de) * 2011-08-16 2013-02-21 Robert Bosch Gmbh Relais und Andrehvorrichtung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660355A1 (fr) * 1993-12-22 1995-06-28 Fuji Electric Co., Ltd. Structure de maintien du noyau de fer d'un contacteur électromagnétique
US20070069840A1 (en) * 2005-09-26 2007-03-29 Denso Corporation Solenoid switch having moving contact configured to prevent contact bounce
DE102011081013A1 (de) * 2011-08-16 2013-02-21 Robert Bosch Gmbh Relais und Andrehvorrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111584258A (zh) * 2019-02-19 2020-08-25 北海市深蓝科技发展有限责任公司 一种设置阻尼块抑制触点吸合冲击力的减少抖动触头结构

Also Published As

Publication number Publication date
CN204596718U (zh) 2015-08-26
EP2924701B1 (fr) 2016-10-19

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