Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H51/00—Electromagnetic relays
  • H01H51/22—Polarised relays
  • H01H51/2209—Polarised relays with rectilinearly movable armature
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/16—Rectilinearly-movable armatures
  • H01F7/1638—Armatures not entering the winding
  • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/081—Magnetic constructions
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/088—Electromagnets; Actuators including electromagnets with armatures provided with means for absorbing shocks
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F7/00—Magnets
  • H01F7/06—Electromagnets; Actuators including electromagnets
  • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
  • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
  • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
  • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
  • H01H33/66—Vacuum switches
  • H01H33/666—Operating arrangements
  • H01H33/6662—Operating arrangements using bistable electromagnetic actuators, e.g. linear polarised electromagnetic actuators
• • 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
• • 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

Definitions

• Electromagnetic actuator in particular for a medium-voltage switch
• the invention relates to an electromagnetic actuator, in particular for a medium voltage switch, with a core acted upon by a coil, and a movable yoke, according to the preamble of claim 1, and a method for producing such an actuator, according to the preamble of claim 15th
• Electromagnetic actuators of this type are widely used. In addition to the application in medium-voltage switches as controlled actuation of the movable contacts, such actuators are also used in machines and in switches.
• the state of the art in the electromagnetic drive of medium-voltage vacuum circuit breakers are single and double-coil electromagnets.
• the electromagnet has the function of moving the movable contact of the vacuum chamber towards the fixed contact when it is switched on and, in an overstroke, tensioning a contact pressure spring.
• the coil of the electromagnet is energized.
• the switched-on position is then with the help of one or more Permanent magnets held against the force of the contact pressure spring. Current in the coil used as Einschaltspule is then no longer required.
• a Ausschaltspule is energized in a two-ply actuator, which initially weakens the holding force of Permanente so far that the contact pressure spring can not be maintained and the movable contact opens. In the course of the switch-off, an opening force can be generated by the Ausschaltspule.
• the invention is therefore based on the object, an electromagnetic actuator of the type mentioned, in particular for an advantageous use in a medium voltage switch to the effect that a compact design is achieved at the same time high actuator force.
• the core of the invention here is that this rectangular core is combined with a round, ie rotationally symmetrical yoke.
• the advantage compared to a rectangular yoke is first of all that the rotationally symmetrical yoke does not have to be secured against twisting - it fulfills its function in every position in the same way. This is especially important when used in medium-voltage switches.
• a magnetic core is rectangular and has a fixed width and a variable depth. Since the core is built up of layered sheets, the depth can be adjusted by the number of sheets. Lateral fixings, bearings and axle can be taken over. Only the permanent magnets and the bobbins are to be adapted to the size of the core via a length variant.
• the present invention Compared to a two-pulley actuator, the present invention - as well as existing single-coil actuators - has the advantages of a reduced
• Frame size and a reduced weight This is essentially because only one coil and only one magnetic circuit are needed.
• the present invention allows a simple adaptation of the magnet size to the design of medium-voltage circuit breakers to be controlled
• Axis can be rotated in a thread so as to be able to adjust the stroke of the magnetic actuator steplessly. Again, the advantage of using a single actuator for a variety of applications that differ by a different switching stroke.
• a particularly compact device can be realized if the drive is arranged directly below the switching pole to be driven, waiving levers and deflections.
• the direct coupling meets the quality of the path / time characteristic of the drive, which is then free of disturbing influences of spring stiffness and lots of a more complicated drive system.
• the area of the permanent magnets is not limited by the predetermined area of the air gap and by
• the actuator is placed directly underneath the vacuum interrupter chamber of a medium-voltage switch and directly on the contact rod. This is a good and fast Kaftein Sign accomplished.
• the actuator switches several switching chambers simultaneously via coupling elements.
• the actuator drives the switching chamber or the switching chambers via lever elements. For certain types of switch this is necessary. Due to the advantageously achieved high actuation forces, this is also possible.
• the hub can be changed via a geometrical design change of the yoke on the actuating axis.
• Permanent magnets are inserted in the magnetic core, the magnetization direction is largely parallel to the plane of the air gap.
• the magnetic circuit is structurally tuned so that a magnetic induction of more than 2 Tesla is present in the air gap.
• the yoke is fixed on an actuating axis which is displaceable on one side through the magnetic core and is connected on the other side to the contact actuating rod to be switched.
• At least one spring is provided acting on the actuating axis, which may preferably be a leaf spring.
• the magnetic core of iron sheets By constructing the magnetic core of iron sheets, the eddy currents induced by flux changes are sufficiently reduced. Also on the addition of silicon in the iron can be omitted.
• Figure 1 perspective view of magnetic actuator with round yoke
• Figure 1 shows a perspective view of an actuator, with an electromagnet 1 with a coil 5, a rectangular magnetic core 2 a round yoke 3.
• the yoke is mounted on an actuating shaft 4, which passes centrally through the magnetic core 2 axially movable therethrough.
• Figure 2 shows a Flußliniendar sued here this electromagnetic actuator.
• the magnetic core 2 shows the flow line course when the system is closed, ie when the round yoke 3 rests on the magnetic core 2.
• permanent magnets 6 whose direction of magnetization lies parallel to the air-gap plane.
• the actuating axis is not shown here, but on her the round yoke 2 and the lower lower yoke 7 are kept spaced apart in this functional manner, as already described above. Hiss small yoke 7 and the magnetic core 2 can be a
• Damping pad 8 may be arranged.
• the actuator can therefore be arranged within a switching device.
• the actuating axis of the actuator is connected to the movable contact of a vacuum interrupter chamber, and acts on this switch-actuating accordingly.
• This connection can be articulated in a straight line but also via levers.
• the high magnetic energy permanent magnetic materials available commercially e.g., NdFeB, SmCo
• NdFeB, SmCo remanent inductions in the range of 1 to 1.4 T. This is significantly lower than in the iron core at reasonable magnetic losses can be performed. Therefore, according to the invention, the permanent magnets were installed with a horizontal polarity.
• the present magnetic actuator is designed so that a magnetic induction of more than 2 T is achieved.
• a damping pad may be inserted, which damps the mechanical abutment of the second yoke on the core at a turn-off. This serves both to avoid vibrations during the attack and a longer life of the entire switching device.
• magenta core iron sheets with a low silicon content are used to induce flux changes
• the turn-off spring can not be placed in the center of the magnet, since this would represent a disturbance of the magnetic symmetry, which can be compensated for only one size , Instead, it is intended that
• a leaf spring is proposed, which is fastened below the actuator and is laterally supported on the housing of the switching device.

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Electromagnets (AREA)
• Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
• Valve Device For Special Equipments (AREA)
• Fluid-Damping Devices (AREA)

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Publications (1)

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Citations (1)

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• 2006
  • 2006-04-05 EP EP06007167A patent/EP1843375B1/fr not_active Expired - Lifetime
  • 2006-04-05 ES ES06007167T patent/ES2369372T3/es not_active Expired - Lifetime
  • 2006-04-05 PL PL06007167T patent/PL1843375T3/pl unknown
  • 2006-04-05 AT AT06007167T patent/ATE515785T1/de active
• 2007
  • 2007-04-04 RU RU2008143300/09A patent/RU2410783C2/ru not_active IP Right Cessation
  • 2007-04-04 CN CN2007800112999A patent/CN101410923B/zh active Active
  • 2007-04-04 AU AU2007233934A patent/AU2007233934B2/en not_active Ceased
  • 2007-04-04 WO PCT/EP2007/003039 patent/WO2007113006A1/fr not_active Ceased
  • 2007-04-04 EP EP07723980A patent/EP2005456A1/fr not_active Withdrawn
  • 2007-04-04 MX MX2008012639A patent/MX2008012639A/es active IP Right Grant
  • 2007-04-04 BR BRPI0710042-6A patent/BRPI0710042B1/pt not_active IP Right Cessation
  • 2007-04-04 UA UAA200811819A patent/UA93899C2/uk unknown
• 2008
  • 2008-10-03 US US12/245,489 patent/US9190234B2/en active Active

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