EP2562778B1 - Dispositif de contacts de puissance à compensation électrodynamique en présence de courants élevés - Google Patents

Dispositif de contacts de puissance à compensation électrodynamique en présence de courants élevés Download PDF

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Publication number
EP2562778B1
EP2562778B1 EP12354042.9A EP12354042A EP2562778B1 EP 2562778 B1 EP2562778 B1 EP 2562778B1 EP 12354042 A EP12354042 A EP 12354042A EP 2562778 B1 EP2562778 B1 EP 2562778B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact element
contact device
current
stationary
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.)
Active
Application number
EP12354042.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2562778A1 (fr
Inventor
Gérald Le Youdec
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2562778A1 publication Critical patent/EP2562778A1/fr
Application granted granted Critical
Publication of EP2562778B1 publication Critical patent/EP2562778B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • 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
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact

Definitions

  • the electrical control unit has no breaking capacity, but its contacts must remain closed in the presence of a short circuit, which is eliminated by a protective circuit breaker connected upstream.
  • the force exerted on the moving contact is directly proportional to the square of the current, but inversely proportional to the inter-contact distance. This distance should not be too great to have a significant effect on low or medium overcurrents. On the other hand, in case of high short-circuit currents, the electrodynamic forces are large and could deform copper contact parts.
  • the document FR2905795 relates to a contact device comprising two separable contact elements extending parallel to each other in the closed position, each being equipped with a pair of contact pads.
  • the two contact elements are arranged facing one another, being electrically connected in parallel, so that the current is shared between the two contact elements, circulating in the same direction. .
  • Such a contact device also requires two contact pads per contact element, which increases the cost of manufacture.
  • the object of the invention is to provide a power contact device with reduced space, and improved electrodynamic compensation regardless of the intensity of the current.
  • the contact device is characterized in that the two fixed and mobile contact elements are shaped in two turns juxtaposed disposed facing each other in the open position, each turn being made of a material both magnetic and current conducting to form a single piece acting as a power contact, generating coil of a magnetic induction field, and a magnetic circuit for reinforcing and channeling said magnetic field.
  • the electrical control apparatus may be a power switch, a contactor, or a toggle switch.
  • the first contact element and the second contact element are made either of a metallic steel material or by sintering of a magnetic metal powder with a thermoplastic binder.
  • the two turns of the first fixed contact element and the second movable contact element extend in two parallel planes in the open position, the second movable contact element being pivotally mounted according to the invention. a vertical axis.
  • the second movable contact element is inserted between the first fixed contact element, and a third fixed contact element to constitute a current reversing contact device with two closed positions located on both sides. other of the middle opening position.
  • the third fixed contact element is shaped according to a turn made of the same material as that of the turn of the first fixed contact element, and extending parallel thereto.
  • Such a contact device is applied to a three-phase inverter allowing the reversal of the direction of rotation of a three-phase electric motor by reversing the connection between two phases.
  • the contacts of this inverter remain closed in the presence of a short circuit.
  • the two connecting conductors are parallel and isolated from each other, and a through conductor without interruption of the current is advantageously integrated in the intermediate pole.
  • a power contact device 10 for an electrical control device comprises a first fixed contact element 11 and a second movable contact element 12.
  • the latter is pivotally mounted about a vertical axis XX 'delimited by two opposed tips 13, 14 aligned in the vertical direction.
  • the first fixed contact element 11 is provided with a contact pad 15 disposed facing another contact pad 16 integral with the second movable contact element 12.
  • the two contact pads 15, 16 are able to occupy either a closure position in which they are in electrical contact for the establishment and passage of the current, ie an open position in which the contact pad 16 separates from the other contact pad 15 after pivoting the second element of contact 12 mobile. This separation of the contacts interrupts the current flow.
  • the opening and closing operations of the contact device 10 are effected by means of an operating mechanism (not shown) housed in the housing of the electrical apparatus.
  • This device of the control function in particular of the switch, contactor or inverter type, has no breaking capacity, and the contact elements 11, 12 must imperatively remain in the closed position in the presence of a high intensity current. , capable of generating efforts of electrodynamic repulsion between the contact pads 15, 16.
  • the two fixed and movable contact elements 11 and 11 are each formed by a turn made of a material that is both magnetic and current-conducting.
  • this material may be made of steel by increasing the section relative to a conventional copper conductor for heating purposes.
  • It can also be manufactured by the MIM process consisting in mixing fine magnetic metal powder with a thermoplastic binder in order to obtain granules of material that can be converted by thermoplastic molding.
  • the piece thus obtained is introduced into an oven to remove the thermoplastic binder, which escapes in the form of gas.
  • the increase of the temperature of the furnace makes it possible to obtain the sintering of the piece conferring on it the cohesion and the structure of a metal part.
  • the two turns of the first fixed contact element 11 and the second movable contact element 12 extend in two parallel planes in the open position, being spaced from each other by an appropriate reduced isolation distance at a good dielectric strength.
  • Each turn has a lower branch 17, and an upper branch 18 which are separated from each other by an elongated slot 19, which extends orthogonally to the vertical direction of the pivot axis XX 'of the second movable contact element 12.
  • Each coil of magnetic material and conductor of the current is a single piece playing the combined role of power contact, a generator coil of a magnetic induction field, and a magnetic circuit for reinforcing and channeling said magnetic field.
  • the attraction forces F1 and F2 are further strengthened by the magnetic circuit formed by the two adjacent loops of magnetic material. This magnetic circuit channels and concentrates the lines of force of the magnetic field generated by the coil of the two turns in series, so as to obtain an optimal attraction effect.
  • Such an electrodynamically compensated structure of the contact device 10 may be implanted in any electrical apparatus that must not react in the presence of a short-circuit current, in particular a switch, a contactor or an inverter switch.
  • the second movable contact element 12 is inserted between the first fixed contact element 11, and a third fixed contact element 20 to constitute a current-reversing contact device 100, with two closed positions located on either side of the the middle open position.
  • the third fixed contact element 20 is shaped according to a turn made of the same material as that of the turn of the first fixed contact element 11, and extending parallel thereto.
  • the contact pad 16 of the second movable contact element 12 may come into contact with either the contact pad 15 of the first fixed contact element 11 or with the contact pad 21 (shown in dotted lines) of the third fixed contact element. 20.
  • the figure 3 shows the contact device 200 of two end poles R, T of a three-phase inverter, using in each pole, the contact device 100 of the figure 2 .
  • the first fixed contact elements 11 of the two end poles R, T are electrically interconnected by a first connecting conductor 22 in connection with a first connection terminal B1.
  • the third fixed contact elements 20 of two end poles R, T are interconnected by a second connecting conductor 23 in connection with a third connection terminal B3.
  • the two connecting conductors 22, 23 are parallel and isolated from each other.
  • the figure 4 represents a contact device 300 with the three poles R, S, T of a three-phase inverter, which uses the contact device 200 of the figure 3 , in addition, integrated in the intermediate pole S, a through conductor 24 without interruption of the current.
  • This conductor 24 is formed by a continuous contact piece in connection with a second connection terminal B2, which is arranged between the first and third terminals B1, B2 of the inverter.
  • the figure 5 is an exploded perspective view of a three-phase inverter whose poles R, S, T are housed in three juxtaposed compartments of a housing 25 of insulating material.
  • the compartments are isolated from each other by vertical partition walls 26, and the contact device 200 is inserted into the end poles R, T through the top of the housing 25 which is open. Nuts 27 make it possible to fix the contact pads of the contact device 200 in the poles.
  • the final assembly of the inverter is then performed by mounting the through conductor 24 in the intermediate pole S, followed by the establishment of the actuating mechanism and the cover (not shown).

Landscapes

  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Tumbler Switches (AREA)
  • Inverter Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)
EP12354042.9A 2011-08-26 2012-08-02 Dispositif de contacts de puissance à compensation électrodynamique en présence de courants élevés Active EP2562778B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1102610A FR2979474B1 (fr) 2011-08-26 2011-08-26 Dispositif de contacts de puissance a compensation electrodynamique

Publications (2)

Publication Number Publication Date
EP2562778A1 EP2562778A1 (fr) 2013-02-27
EP2562778B1 true EP2562778B1 (fr) 2014-09-10

Family

ID=46642456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12354042.9A Active EP2562778B1 (fr) 2011-08-26 2012-08-02 Dispositif de contacts de puissance à compensation électrodynamique en présence de courants élevés

Country Status (12)

Country Link
US (1) US8674793B2 (zh)
EP (1) EP2562778B1 (zh)
JP (1) JP6112803B2 (zh)
KR (1) KR101925643B1 (zh)
CN (1) CN102956375B (zh)
BR (1) BR102012021340B1 (zh)
CA (1) CA2784815C (zh)
ES (1) ES2523405T3 (zh)
FR (1) FR2979474B1 (zh)
RU (1) RU2592634C2 (zh)
TW (1) TWI592963B (zh)
ZA (1) ZA201205976B (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103943384B (zh) * 2014-04-29 2016-03-16 常熟开关制造有限公司(原常熟开关厂） 一种多极切换开关装置的转换触头
FR3081608B1 (fr) 2018-05-28 2021-01-22 Amc Inverseur de source de courant pour centrale nucleaire
CN114730756A (zh) * 2019-11-15 2022-07-08 三菱电机株式会社 半导体装置
EP3979279A1 (en) * 2020-09-30 2022-04-06 ABB Schweiz AG Electrical contactor
CN114388316B (zh) * 2021-12-24 2024-03-12 上海京硅智能技术有限公司 断路器触头系统

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2944129A (en) * 1957-11-12 1960-07-05 Fed Pacific Electric Co Circuit breakers
US4467301A (en) * 1982-08-27 1984-08-21 Essex Group, Inc. Electric switch having enhanced fault current capability
US4849590A (en) * 1988-04-01 1989-07-18 Kohler Company Electric switch with counteracting electro-electro-dynamic forces
JPH03246834A (ja) * 1990-02-23 1991-11-05 Matsushita Electric Works Ltd 接点装置
GB9317260D0 (en) * 1993-08-19 1993-10-06 Blp Components Ltd Solenoid operated switching devices
US6176837B1 (en) * 1998-04-17 2001-01-23 Massachusetts Institute Of Technology Motion tracking system
FR2795227B3 (fr) * 1999-06-18 2001-07-20 Schneider Electric Ind Sa Appareil electromagnetique de commutation de type multipolaire
JP2002343478A (ja) * 2001-05-16 2002-11-29 Tyco Electronics Amp Kk 電気コンタクトおよびそれを用いた電気接続部材
FR2897469B1 (fr) * 2006-02-13 2009-07-10 Legrand France Dispositif de commutation electrique aux contacts electriques renforces
FR2905795B1 (fr) * 2006-09-12 2012-11-16 Schneider Electric Ind Sas Dispositif de contact pour appareil electrique et appareil electrique equipe d'un tel dispositif
FR2947667A1 (fr) * 2009-07-01 2011-01-07 Schneider Electric Ind Sas Asservissement via un dispositif de compensation magnetique des forces de repulsion et contacteur comprenant un tel dispositif

Also Published As

Publication number Publication date
RU2592634C2 (ru) 2016-07-27
BR102012021340B1 (pt) 2020-09-08
TWI592963B (zh) 2017-07-21
JP2013048091A (ja) 2013-03-07
ES2523405T3 (es) 2014-11-25
FR2979474A1 (fr) 2013-03-01
TW201320133A (zh) 2013-05-16
EP2562778A1 (fr) 2013-02-27
US8674793B2 (en) 2014-03-18
CA2784815A1 (en) 2013-02-26
CA2784815C (en) 2019-08-27
US20130049905A1 (en) 2013-02-28
BR102012021340A2 (pt) 2014-04-15
CN102956375B (zh) 2016-02-17
RU2012134469A (ru) 2014-02-20
KR20130023166A (ko) 2013-03-07
JP6112803B2 (ja) 2017-04-12
FR2979474B1 (fr) 2013-09-27
CN102956375A (zh) 2013-03-06
ZA201205976B (en) 2013-05-29
KR101925643B1 (ko) 2019-02-27

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