EP2394285B1 - Elektromagnetische relaisbaugruppe - Google Patents

Elektromagnetische relaisbaugruppe Download PDF

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Publication number
EP2394285B1
EP2394285B1 EP09839782.1A EP09839782A EP2394285B1 EP 2394285 B1 EP2394285 B1 EP 2394285B1 EP 09839782 A EP09839782 A EP 09839782A EP 2394285 B1 EP2394285 B1 EP 2394285B1
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EP
European Patent Office
Prior art keywords
spring
assembly
contact
electromagnetic relay
switch
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Active
Application number
EP09839782.1A
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English (en)
French (fr)
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EP2394285B8 (de
EP2394285A2 (de
EP2394285A4 (de
Inventor
Philipp Gruner
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Hongfa Holdings US Inc
Original Assignee
Clodi LLC
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Publication of EP2394285A4 publication Critical patent/EP2394285A4/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
    • H01H50/641—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement
    • H01H50/642—Driving arrangements between movable part of magnetic circuit and contact intermediate part performing a rectilinear movement intermediate part being generally a slide plate, e.g. a card
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/44—Magnetic coils or windings
    • 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
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding

Definitions

  • the disclosed invention generally relates to an electromagnetic relay assembly incorporating a uniquely configured armature assembly. More particularly, the disclosed invention relates to an electromagnetic relay assembly having a magnetically actuable rotor assembly for linearly displacing a switch actuator.
  • an electromagnetic relay is to use a small amount of power in the electromagnet to move an armature that is able to switch a much larger amount of power.
  • the relay designer may want the electromagnet to energize using 5 volts and 50 milliamps (250 milliwatts), while the armature can support 120 volts at 2 amps (240 watts).
  • Relays are quite common in home appliances where there is an electronic control turning on (or off) some application device such as a motor or a light.
  • the present teachings are primarily intended for use as a single pole, 120-amp passing electromagnetic relay assembly.
  • United States Patent No. 6,046,660 ('660 Patent), which issued to Gruner, discloses a Latching magnetic relay assembly with a linear motor.
  • the '660 Patent teaches a latching magnetic relay capable of transferring currents of greater than 100 amps for use in regulating the transfer of electricity or in other applications requiring the switching of currents of greater than 100 amps.
  • a relay motor assembly has an elongated coil bobbin with an axially extending cavity therein. An excitation coil is wound around the bobbin.
  • a generally U shaped ferromagnetic frame has a core section disposed in and extending through the axially extending cavity in the elongated coil bobbin. Two contact sections extend generally perpendicularly to the core section and rises above the motor assembly.
  • An actuator assembly is magnetically coupled to the relay motor assembly.
  • the actuator assembly is comprised of an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet.
  • a contact bridge made of a sheet of conductive material copper is operatively coupled to the actuator assembly.
  • United States Patent No. 6,246,306 ('306 Patent), which issued to Gruner, discloses an Electromagnetic Relay with Pressure Spring.
  • the '306 Patent teaches an electromagnetic relay having a motor assembly with a bobbin secured to a housing.
  • a core is adjacently connected below the bobbin except for a core end, which extends from the bobbin.
  • An armature end magnetically engages the core end when the coil is energized.
  • An actuator engages the armature and a plurality of center contact spring assemblies.
  • the center contact spring assembly is comprised of a center contact spring which is not pre bent and is ultrasonically welded onto a center contact terminal.
  • a normally open spring is positioned relatively parallel to a center contact spring.
  • the normally open spring is ultrasonically welded onto a normally open terminal to form a normally open outer contact spring assembly.
  • a normally closed outer contact spring is vertically positioned with respect to the center contact spring so that the normally closed outer contact spring assembly is in contact with the center contact spring assembly, when the center contact spring is not being acted upon by the actuator.
  • the normally closed spring is ultrasonically welded onto a normally closed terminal to form a normally closed assembly.
  • a pressure spring pressures the center contact spring above the actuator when the actuator is not in use.
  • the '478 Patent discloses an Electromagnetic Relay.
  • the '478 Patent teaches an electromagnetic relay having a motor assembly with a bobbin secured to a frame.
  • a core is disposed within the bobbin except for a core end which extends from the bobbin.
  • An armature end magnetically engages the core end when the coil is energized.
  • An actuator engages the armature and a plurality of movable blade assemblies.
  • the movable blade assembly is comprised of a movable blade ultrasonically welded onto a center contact terminal.
  • a normally open blade is positioned relatively parallel to a movable blade.
  • the normally open blade is ultrasonically welded onto a normally open terminal to form a normally open contact assembly.
  • a normally closed contact assembly comprised of a third contact rivet and a normally closed terminal.
  • a normally closed contact assembly is vertically positioned with respect to the movable blade so that the normally closed contact assembly is in contact with the movable blade assembly when the movable blade is not being acted upon by the actuator.
  • United States Patent No. 6,320,485 discloses an Electromagnetic Relay Assembly with a Linear Motor.
  • the '485 Patent teaches an electromagnetic relay capable of transferring currents of greater than 100 amps for use in regulating the transfer of electricity or in other applications requiring the switching of currents of greater than 100 amps.
  • a relay motor assembly has an elongated coil bobbin with an axially extending cavity therein. An excitation coil is wound around the bobbin.
  • a generally U shaped ferromagnetic frame has a core section disposed in and extending through the axially extending cavity in the elongated coil bobbin. Two contact sections extend generally perpendicularly to the core section and rises above the motor assembly.
  • An actuator assembly is magnetically coupled to the relay motor assembly.
  • the actuator assembly is comprised of an actuator frame operatively coupled to a first and a second generally U-shaped ferromagnetic pole pieces, and a permanent magnet.
  • a contact bridge made of a sheet of conductive material copper is operatively coupled to the actuator assembly.
  • '409 Patent discloses a Latching Magnetic Relay Assembly.
  • the '409 Patent teaches a latching magnetic relay assembly comprising a relay motor with a first coil bobbin having a first excitation coil wound therearound and a second coil bobbin having a second excitation coil wound therearound, both said first excitation coil and said second excitation coil being identical, said first excitation coil being electrically insulated from said second excitation coil; an actuator assembly magnetically coupled to both said relay motor, said actuator assembly having a first end and a second end; and one or two groups of contact bridge assemblies, each of said group of contact bridge assemblies comprising a contact bridge and a spring.
  • European Patent Document No. EP 2,009,665 A2 ('665 Patent), issued to Gruner AG, discloses a Two Pole Relay.
  • the '665 Patent describes an electromagnetic relay (1) for enabling current to pass through switch termini (3, 4) comprising a coil assembly (10), a bridge assembly (12), and first and second switch assemblies (7, 9), which assemblies (7, 9) are cooperable with actuators (15) of the bridge assembly (12).
  • the coil assembly (10) creates a magnetic field directable through the bridge assembly (12) via core termini for imparting bridge (13) rotation about its axis of rotation via magnetically induced torque.
  • the bridge (13) rotation displaces the actuators (15) for opening and closing the switch assemblies (7, 9), which switch assemblies (7, 9) enable current to pass therethrough when in the closed position.
  • the bridge assembly (12) comprises a bridge axis of rotation, a bridge (13), and opposing actuators (15, left and right) whereby the bridge (13) comprises a medial field pathway, a lateral field pathway, and spaced transverse field pathways.
  • the actuators (15) extend from the terminal portions (14) of the lateral field pathway. Core termini of the core (11) are parallel to the coil axis and coplanar with the bridge axis of rotation received intermediate the medial and lateral field pathways.
  • the electromagnetic relay assembly of the present disclosure comprises an electromagnetic coil assembly, an armature bridge assembly, and a switch assembly, as described in more detail hereinafter.
  • the coil assembly essentially comprises a coil, a C-shaped yoke assembly, and a coil axis.
  • the coil is wound around the coil axis, and the yoke assembly comprises first and second yoke arms.
  • Each yoke arm comprises an axial yoke portion that is coaxially alignable with the coil axis and together form the back of the C-shaped yoke assembly.
  • Each yoke arm further comprises a yoke terminus, which yoke termini are coplanar and substantially parallel to the coil axis.
  • the armature bridge assembly is rotatable about an axis orthogonally spaced from the coil axis and coplanar with the yoke termini.
  • the armature bridge assembly thus comprises a bridge axis of rotation, a bridge, and an actuator arm.
  • the bridge comprises a medial field pathway relative closer in proximity to the coil axis, a lateral field pathway relatively further in proximity to the coil axis, and longitudinally or axially spaced medial-to-lateral or lateral-to-medial field pathways (or transverse field pathways) extending intermediate the medial and lateral pathways.
  • the actuator arm is cooperable with the lateral field pathway via a first end thereof and extends laterally away from the lateral field pathway.
  • the switch assembly essentially comprises switch terminals and a spring assembly between the switch terminals.
  • the spring assembly is attached a second end of the actuator arm.
  • the yoke termini are received intermediate the medial and lateral pathways.
  • the coil receives current and creates or imparts a magnetic field, which magnetic field is directable through the bridge assembly via the yoke termini for imparting bridge rotation about the bridge axis of rotation and linearly displacing the actuator arm.
  • the displaceable actuator arm functions to actuate the spring assembly intermediate an open contact position and a closed contact position, which closed contact position enables current to pass through the switch assembly via the switch termini.
  • Certain peripheral features of the essential electromagnetic relay assembly include certain means for enhancing spring over travel, which means function to increase contact pressure intermediate the switch terminals when the spring assembly is in the closed position.
  • the means for enhancing spring over travel further provide means for contact wiping or contact cleansing via the enhanced contact or increased contact pressure.
  • the enhanced conduction path through the contact interface may well function to burn off residues and/or debris that may otherwise come to rest at the contact surfaces.
  • the means for enhancing spring over travel may well further function to provide certain means for damping contact bounce or vibration intermediate the first and second contacts when switching from the open position to the closed position.
  • the preferred embodiment of the present invention concerns an electromagnetic relay assembly 10 as illustrated and referenced in Figure Nos. 1 - 3.
  • the electromagnetic relay assembly 10 of the present invention essentially functions to selectively enable current to pass through switch termini 11 as illustrated and referenced in Figure Nos. 1 - 5.
  • the electromagnetic relay assembly 10 of the present invention preferably comprises an electromagnetic coil assembly 12 as generally illustrated and referenced in Figure Nos. 1 - 3, and 6; a rotatable armature assembly 13 as generally illustrated and referenced in Figure Nos. 1 - 3; and a switch assembly 14 as generally illustrated and referenced in Figure Nos. 1 - 5.
  • the coil assembly 12 of the present invention preferably comprises a current-conductive coil 15 as illustrated and referenced in Figure Nos. 1 - 3, and 6; a C-shaped core or yoke assembly 16 as illustrated and referenced in Figure Nos. 3, 6, and 12; and a coil axis 100 generally referenced and depicted in Figure Nos. 1, 2, 6, and 12. It may be seen or understood from an inspection of the noted figures that the current-conductive coil 15 is wound around the coil axis 100 and comprises first and second electromagnet-driving termini 17 as illustrated and referenced in Figure Nos. 1 - 3, and 6.
  • the yoke assembly or C-shaped core assembly 16 of the present invention is axially received within the coil 15 and preferably comprises first and second yoke arms 18, one of which is illustrated and referenced in Figure Nos. 1 - 3, and both of which are illustrated and referenced in Figure No. 6. It may be seen from an inspection of Figure No. 6 that yoke arms 18 each comprise an axial yoke portion 19 and a substantially planar yoke terminus 20, which yoke termini 20 are preferably parallel to the coil axis 100 as further referenced and depicted in Figure No. 12.
  • the rotatable armature assembly 13 of the present invention may be described as preferably comprising a rotor assembly 21 as generally illustrated and referenced in Figure Nos. 1 - 3, and 7; an actuator or actuator arm 22 as generally illustrated and referenced in Figure Nos. 1 - 3, 9, and 10; and an armature axis of rotation 101 as depicted and referenced at a point in Figure Nos. 1, 2, 12, and 15, and as a line in Figure Nos. 3 and 7.
  • the rotor assembly 21 preferably comprises first and second uniformly directed or polarized rotor magnets 23 as illustrated and referenced in Figure Nos. 7 and 12; a rotor plate 25 as illustrated and referenced in Figure Nos.
  • the rotor bracket 26 is attached or otherwise cooperatively associated with a first end of the actuator arm 22, and that the rotor plate 25 and the rotor bracket 26 (or portions thereof) are preferably oriented parallel to one another by way of the rotor housing 27.
  • the first and second rotor magnets 23 are equally dimensioned and extend intermediate the rotor plate 25 and the rotor bracket 26 for simultaneously and equally spacing the rotor plate 25 and the rotor bracket 26 and for further providing a guide way or pathway for so-called Lorenz current or magnetic flux to be effectively transversely directed across the rotor or bridge assembly 21 as diagrammatically depicted in Figure No. 12.
  • the armature assembly 13 may be thought of as an armature bridge assembly, which bridge assembly comprises a bridge axis of rotation (akin to the armature axis of rotation 101) and a bridge in cooperative association with the armature arm 22.
  • the bridge may be thought of or described as preferably comprising a medial pathway (akin to the rotor plate 25), a lateral pathway (akin to the rotor bracket 26), and longitudinally or axially spaced medial-to-lateral or transverse pathways (akin to the first and second rotor magnets 23.
  • the armature arm 22 may thus be described as extending laterally away from the lateral pathway or rotor bracket 26 for engaging the switch assembly 14.
  • the rotor housing 27 essentially functions to receive, house, and position the first and second rotor magnets 23, the rotor plate 25 and the rotor bracket 26 to form the bridge like structure of the armature assembly 13.
  • the rotor magnets 23 are uniformly directed such that like poles face the same rotor structure. For example, it is contemplated that the north poles of rotor magnets 23 may face the rotor bracket 26 (the south poles thereby facing the rotor plate 25) or that the south poles of rotor magnets 23 may face the rotor bracket 26 (the north poles thereby facing the rotor bracket).
  • the rotor housing 27 may well further comprise a pin-receiving aperture or bore for receiving the rotor pin 29 as may be generally seen from an inspection of Figure Nos. 3 and 7.
  • the pin-receiving aperture or bore of the rotor housing 27 enables rotation of the bridge or armature assembly 13 about the armature axis of rotation 101.
  • the rotor pin 29, extending through the pin-receiving bore may be axially anchored at a lower end thereof by way of a relay housing 48 as illustrated and referenced in Figure Nos. 1 - 3, and which relay housing 48 is sized and shaped to receive, house, and position the coil assembly 12, the armature assembly 13, and the switch assembly 14 as may be readily understood from an inspection of Figure No. 3. It may be further readily understood from an inspection of Figure No. 3 that the relay housing 48 may, but not necessarily, comprise or be cooperable with a relay cover 49.
  • the armature assembly 13 of present invention may be anchored or mounted by way of the rotor mount 30.
  • Rotor mount 30 may be cooperatively associated with the relay housing 48 (i.e. anchored to the relay housing 48) for axially fixing the rotor pin 29, the fixed rotor mount 30 receiving and anchoring an upper end of the rotor pin 29 so as to enable users of the relay to effectively operate the electromagnetic relay assembly 10 of the present invention without the relay cover 49.
  • the rotor mount 30 or bridge mount or means for mounting the rotor assembly or bridge assembly may thus be described as providing certain means for enabling open face operation of the electromagnetic relay assembly 10. It is contemplated, for example, that in certain scenarios a coverless relay assembly provides a certain benefit. For example, the subject relay assembly may be more readily observed during testing procedures.
  • the rotor mount 30 of the present invention enables cover-free operation of the electromagnetic relay assembly 10 by otherwise fixing the armature assembly 13 to the relay housing 48.
  • the switch assembly 14 of the present relay assembly 10 preferably comprises a first switch terminal assembly 31 as generally illustrated and referenced in Figure Nos. 1 - 4; and a second switch terminal assembly 32 as illustrated and referenced in Figure Nos. 1 - 3, 5, 13, and 14; and a triumvirate spring assembly 33 as illustrated and referenced in Figure Nos. 1 - 3, 5, 8 - 11, 13, and 14.
  • the first switch terminal assembly 31 preferably comprises a first contact button 34 and a first switch terminus as at 11.
  • the second switch terminal assembly 32 preferably comprises a second switch terminus as at 11.
  • the triumvirate spring assembly 33 comprises a second contact button 37 as illustrated and referenced in Figure Nos. 1, 2, 9 -11, 13, and 14; and a first spring 38, second spring 39, and third spring 40 as further illustrated and referenced in Figure Nos. 5, 8 - 10, and 13.
  • the first spring 38 comprises a first contact-receiving aperture as at 41 and a first C-shaped aperture as at 42 in Figure No. 8, as well as an end-located offset or bend as at 70 in Figure Nos. 13 and 14.
  • the first C-shaped aperture 42 is concentric about the first contact-receiving aperture 41.
  • the second spring 39 comprises a second contact-receiving aperture as at 43 and a first C-shaped fold as at 44 in Figure No. 8.
  • the third spring 40 preferably comprises a third contact-receiving aperture as at 45, a second C-shaped aperture as at 46, and a second C-shaped fold as at 47.
  • the second C-shaped aperture 46 is preferably concentric about the third contact-receiving aperture 45, and that the second C-shaped fold 47 has a certain second radius of curvature, which second radius of curvature is greater in greater in magnitude than the first radius of curvature (of the first C-shaped fold 44).
  • the second spring 39 is sandwiched intermediate the first and third springs 38 and 40 via the second contact button 37 as received or extended through the contact-receiving apertures 41, 43, and 45.
  • the first C-shaped fold 44 is concentric (about a fold axis) within the second C-shaped fold 47.
  • the first and second contact buttons 34 and 37 or contacts are spatially oriented or juxtaposed adjacent one another as generally depicted in Figure Nos. 1, 2, 9, and 10.
  • the triumvirate spring assembly 33 is biased in an open contact position intermediate the first and second switch termini 11 and attached to (the lateral end of) the armature arm 22 as perhaps mostly clearly depicted in Figure Nos. 9 and 10.
  • first and second C-shaped apertures 42 and 46, and the end-located offset or bend 70 may well function to provide certain means for enhanced over travel for increasing contact pressure intermediate the first and second contact buttons 34 and 37.
  • the reader is further directed to Figure Nos. 9 and 10. From a comparative consideration of the noted figures, it may be seen that the terminal side ends 53 of the spring assembly 33 may be actuated past the planar portions of the spring assembly immediately adjacent the stem 51 of contact button 37. The planar portions of the spring assembly immediately (and radially) adjacent the stem 51 of contact button 37 thus form button-stackable spring portions as at 52 in Figure Nos. 8 and 11. From an inspection of Figure Nos. 8 and 11, it may be seen that the button-stackable portions 52 stack upon the contact button 37 and that terminal side ends 53 of the elastically deform as at 50 for enabling said over travel.
  • the material (preferably copper) of the spring elements having the C-shaped apertures is more readily and elastically deformable at the termini of the C-shaped apertures as at 50 in Figure No. 8.
  • the elastic deformation of the material adjacent termini 50 does not result in appreciable embrittlement of the underlying material lattice (i.e. does not appreciably impart undesirable lattice dislocations) and thus the C-shaped aperture structure or feature of the triumvirate spring assembly provides a robust means for enhanced over travel for further providing a certain added pressure intermediate the contact buttons 34 and 37 for improving conductive contact(s) therebetween.
  • the end-located offset or bend 70 further provides a means for enhanced overtravel for increasing contact pressure and reducing contact bounce of the contacts 34 and 37.
  • Conduction through the contact buttons 34 and 37 is thus improved by way of the C-shaped aperture-enabled and/or enhanced over travel as generally depicted in Figure No. 10. It is contemplated that the enhanced contact and resulting conduction provides certain means for improved contact wiping, the means for contact wiping or contact cleansing thus being further enabled by way of the enhanced over travel. In this regard, it is contemplated that the relay assembly 10 of the present invention inherently has a self-cleansing feature as enabled by the C-shaped apertures 42 and 46.
  • the C-shaped apertures 42 and 46 may well provide certain means for reducing contact bounce or for otherwise damping contact vibration intermediate the contact buttons 34 and 37 when switching from an open contact state or open switch position (as generally depicted in Figure No. 1) to a closed contact state or closed switch position (as generally depicted in Figure No. 2).
  • the magnetic field 102 is directed through the yoke termini 20 via the rotor assembly (essentially defined by the rotor bracket 26, the rotor magnets 23, and the rotor plate 25) for imparting armature or bridge rotation about the armature axis of rotation 101 via a magnetically induced torque.
  • the rotor bracket 26 thus functions to linearly displace the actuator arm 22, which displaced actuator arm 22 functions to actuate the triumvirate spring assembly 33 from a preferred spring-biased open position (as generally depicted in Figure No. 1) to a spring-actuated closed position (as generally depicted in Figure No. 2).
  • the material construction of the relay assembly 10 (believed to be within the purview of those skilled in the art) and the closed position essentially function to enable 120-amp current to pass through the switch assembly 14 via the first and second contact buttons 34 and 37 and the switch termini 11.
  • the return spring 28 may well function to enhance return of the triumvirate spring assembly 33 to the preferred spring-biased open position as generally depicted in Figure Nos. 11.
  • the electromagnetic relay 10 may preferably further comprise certain closed contact default means, the closed contact default means for forcing the first and second contact buttons 34 and 37 closed during said fault current or short circuit condition(s).
  • the path followed by the Lorenz current or magnetic field path as generally depicted in Figure No. 12 by vector arrows 102.
  • the electromagnetic relay according to the present invention may comprise certain means for defaulting to an open contact position during threshold terminal-based current conditions.
  • FIG No. 15 is a diagrammatic depiction of a threshold current path as at 71 being directed through the relay terminals 31 and 32 via the contact buttons 34 and 37.
  • a magnetic force vector as at 103 is depicted as terminal-sourced via the charge carrier current flowing through the path 71. After reaching certain threshold amperage, the magnetic field generated through the terminals 31 and 32 will interact with the permanent magnets or rotor magnets 23 of the rotatable armature assembly 13.
  • the magnets 23 have an inherent magnetic field directed outward as referenced at vector arrow 104, the force of which is lesser in magnitude than the force at vector arrow 103.
  • the difference in force between 104 and 103 as directed causes the rotatable armature assembly 13 to rotate toward an open contact position as diagrammatically shown in Figure No. 15. This feature can be calibrated by the size and strength of the magnets 23 and the distance between the armature and stationary contacts.
  • an electromagnetic relay assembly for enabling current to pass through switch termini, which electromagnetic relay assembly comprising a coil assembly, a bridge assembly, and a switch assembly.
  • the coil assembly comprises a coil, a coil axis, and a C-shaped core.
  • the coil is wound around the coil axis 100, and the coil axis extends 100 through the core as at 60 in Figure No. 12.
  • the core 60 comprises core termini 20, which core termini 20 are substantially parallel to the coil axis 100.
  • the bridge assembly comprises an axis of rotation as at 101 and a bridge as at 61 in Figure Nos. 12 and 15; and a switch actuator as at 22.
  • the bridge 61 comprises a medial field pathway 63 (i.e. a pathway relatively closer in proximity to the core 60), a lateral field pathway 64 (i.e. a pathway relatively further in proximity to the core 60), and axially spaced transverse pathways 65 for guiding the field as at 102 intermediate the medial and lateral field pathways 63 and 64.
  • the actuator arm 22 is cooperable with, and extends away from, the lateral pathway 64 (not specifically depicted in Figure No. 12).
  • the core termini 20 are preferably coplanar with the axis of rotation 101 and received intermediate the medial and lateral pathways 63 and 64.
  • the transverse pathways 65 provide certain field-diversion means for transversely diverting the magnetic field 102 relative to the coil axis 100 and magnetically inducing a torque, which magnetically induced torque functions to actuate the switch actuator 22.
  • Said field diversion means may be further described as comprising certain field division means (there being two axis-opposing paths as at 66 in Figure No. 12) for creating a magnetic couple about the magnetically induced torque.
  • the switch assembly as at 14 is further cooperable with the actuator arm 22, which actuator arm 22 is essentially a coupling intermediate the bridge assembly 61 and the switch assembly 14.
  • the coil functions to create or impart a magnetic field as vectorially depicted at 102.
  • the magnetic field 102 is directable through the bridge assembly 61 via the core termini 20 for imparting bridge rotation about the axis of rotation 101 via magnetically induced torque.
  • the bridge rotation functions to displace the actuator arm 22, which displaced actuator arm 22 physically opens and closes the switch assembly 14. As is most readily understood in the arts, the closed switch assembly 14 enables current to pass therethrough.
  • the switch assembly 14 comprises certain spring means for enhancing spring over travel, said means for enhancing the closed switch position by way of increasing the contact pressure intermediate contact buttons 34 and 37.
  • the spring means for enhancing spring over travel further provide contact wiping means, and vibration damping means.
  • the contact wiping means are contemplated to effectively self-cleanse the switch assembly 14, and the vibration damping means function to damp contact vibration when switching from open to closed switch positions.
  • the spring means for enhancing spring over travel may thus be said to enhance the closed switch position by increasing contact pressure intermediate the contacts, by maintaining a residue free contact interface, and by damping contact vibration when closing the contacts.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Relay Circuits (AREA)
  • Magnetic Treatment Devices (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Claims (11)

  1. Elektromagnetisches Relais (10), das eine Spulenanordnung (12), eine drehbare Ankeranordnung (13) und zwei Schalteranordnungen (14) umfasst, wobei die Schalteranordnungen (14) jeweils eine Federanordnung (33) mit drei Federn umfassen, jede Federanordnung (33) drei gestapelte Federelemente (40, 39, 38) umfasst, wobei jedes Federelement (40, 39, 38) eine primäre, in Längsrichtung verlaufende Federachse (102) umfasst, ein erstes Federelement (40) eine erste Federlänge, eine erste, einen Kontakt aufnehmende Öffnung (45) und einen ersten elastischen Federabschnitt (76) umfasst, ein zweites Federelement (39) eine zweite Federlänge, eine zweite, einen Kontakt aufnehmende Öffnung (43) umfasst und gekennzeichnet ist durch eine halbkreisförmige, erste, durch eine Öffnung definierte Verlängerung (52), die ein Abschlussende (96) der zweiten Federlänge definiert, ein drittes Federelement (38), das eine dritte Federlänge, eine halbkreisförmige erste Nachlauföffnung (42), eine dritte, einen Kontakt aufnehmende Öffnung (41), eine halbkreisförmige, zweite, durch eine Öffnung definierte Verlängerung (52) zwischen der ersten Nachlauföffnung und dritten, einen Kontakt aufnehmenden Öffnung (42, 41) und einen zweiten elastischen Federabschnitt (76) umfasst, wobei das zweite Federelement (39) zwischen dem ersten und dritten Federelement (40, 38) derart angeordnet ist, dass die erste und zweite durch eine Öffnung definierte Verlängerung (52) gleichmäßig gestapelt sind, und der erste und zweite elastische Federabschnitt (76) mittels des dazwischen angeordneten zweiten Federelements (39) in voneinander beabstandeter Beziehung zur Betätigung durch Aktorelemente (22) der Schalteranordnungen (14) angeordnet sind.
  2. Elektromagnetisches Relais (10) nach Anspruch 1, wobei jedes Federelement (40, 39, 38) seitlich gegenüberliegende Federabschnitte (60) umfasst, wobei jeder Federabschnitt (60) eine in Längsrichtung verlaufende Federabschnittachse (103) aufweist, das erste Federelement (40) seitlich gegenüberliegende, erste, einen Kontakt aufnehmende Öffnungen (45) und seitlich gegenüberliegende, erste, elastische Federabschnitte (76) umfasst, das zweite Federelement (39) seitlich gegenüberliegende, zweite, einen Kontakt aufnehmende Öffnungen (43) und seitlich gegenüberliegende, halbkreisförmige, erste, durch eine Öffnung definierte Verlängerungen (52) umfasst, die seitlich gegenüberliegende Abschlussenden (96) der zweiten Federlänge definieren, das dritte Federelement (38) seitlich gegenüberliegende, halbkreisförmige, erste Nachlauföffnungen (42), seitlich gegenüberliegende, dritte, einen Kontakt aufnehmende Öffnungen (41), seitlich gegenüberliegende, halbkreisförmige, zweite, durch eine Öffnung definierte Verlängerungen (52) zwischen der ersten Nachlauföffnung und dritten, einen Kontakt aufnehmenden Öffnung (42, 41) und seitlich gegenüberliegende, zweite, elastische Federabschnitte (76) umfasst.
  3. Elektromagnetisches Relais (10) nach Anspruch 1, wobei die ersten halbkreisförmigen Nachlauföffnungen (42) jeweils symmetrisch um die in Längsrichtung verlaufenden Federabschnittsachsen (103) herum sind.
  4. Elektromagnetisches Relais (10) nach Anspruch 1, wobei der erste und zweite elastische Federabschnitt (76) relativ zueinander parallel sind, wenn sich die Schalteranordnungen in einer offenen Schalterkonfiguration befinden.
  5. Elektromagnetisches Relais (10) nach Anspruch 1, wobei der erste und zweite elastische Federabschnitt (76) relativ zueinander nicht parallel sind, wenn sich die Schalteranordnungen in einer offenen Schalterkonfiguration befinden.
  6. Elektromagnetisches Relais (10) nach Anspruch 4 oder 5, wobei der erste und zweite elastische Federabschnitt (76) durch das Aktorelement (22) der Schalteranordnungen in paralleler Relation zueinander betätigt sind, wenn sich die Schalteranordnungen in einer geschlossenen Schalterkonfiguration befinden.
  7. Elektromagnetisches Relais (10) nach Anspruch 1, wobei die Federanordnung (33) mit drei Federn Mittel zum Erweitern des Federnachlaufs und zum Erweitern einer geschlossenen Schalterstellung definiert.
  8. Elektromagnetisches Relais (10) nach Anspruch 1, wobei die Federanordnung (33) mit drei Federn Kontaktwischermittel definiert, wobei die Mittel zum Reinigen der Schalteranordnung dienen.
  9. Elektromagnetisches Relais (10) nach Anspruch 1, wobei die Federanordnung (33) mit drei Federn Mittel zum Dämpfen von Kontaktschwingung definiert, wenn von offenen in geschlossene Schalterpositionen geschaltet wird.
  10. Elektromagnetisches Relais (10) nach Anspruch 1, das eine Brückenanordnung (21) umfasst, wobei die Brückenanordnung (21) sich durch Brückenbefestigungsmittel auszeichnet, um einen Betrieb des elektromagnetischen Relais (10) mit offener Front zu ermöglichen, wobei die Brückenbefestigungsmittel durch ein Rotorhalterungselement (30) definiert sind, wobei das Rotorhalterungselement (30) eine einen Zapfen aufnehmende Öffnung (88) zur Aufnahme eines Rotorzapfens (29) der drehbaren Ankeranordnung (13) der Brückenanordnung (21) umfasst.
  11. Elektromagnetisches Relais (10) nach Anspruch 1, wobei Aktorelemente (22) gleichzeitig und jeweils die Schalteranordnungen (14) über Zug schließen (80) bzw. über Druck schließen (81), um einen Stromfluss dort hindurch zu ermöglichen.
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AU2009339410A1 (en) 2011-09-01

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