EP1936640A1 - Electroaimant à courant continu - Google Patents

Electroaimant à courant continu Download PDF

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Publication number
EP1936640A1
EP1936640A1 EP06026504A EP06026504A EP1936640A1 EP 1936640 A1 EP1936640 A1 EP 1936640A1 EP 06026504 A EP06026504 A EP 06026504A EP 06026504 A EP06026504 A EP 06026504A EP 1936640 A1 EP1936640 A1 EP 1936640A1
Authority
EP
European Patent Office
Prior art keywords
yoke
air gap
pole
electromagnet
height
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.)
Withdrawn
Application number
EP06026504A
Other languages
German (de)
English (en)
Inventor
Alfred BÄUML
Klaus Danzer
Iva Hoffmann
Alexander Oberleiter
Daniela Streble
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
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 filed Critical Siemens AG
Priority to EP06026504A priority Critical patent/EP1936640A1/fr
Publication of EP1936640A1 publication Critical patent/EP1936640A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01F7/127—Assembling
    • 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
    • H01F2007/083—External yoke surrounding the coil bobbin, e.g. made of bent magnetic sheet
    • 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
    • H01F7/1607—Armatures entering the winding
    • H01F7/1623—Armatures having T-form
    • 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
    • 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
    • H01H50/34—Means for adjusting limits of movement; Mechanical means for adjusting returning force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • 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

Definitions

  • the invention relates to a DC electromagnet, in particular for a low-voltage circuit breaker device.
  • the DC electromagnet consists of a magnetic core, pole plates and a yoke and is often used as a DC-DC contactor.
  • Electromagnets come in different shapes. There are several parameters to consider when sizing a DC drive system. One parameter of this is the air gap. Due to a defined setting of the air gap, the variable "air gap" becomes a fixed constant and thus facilitates the design of the drive system. When the solenoid comprises two pairs of pole faces, each formed by armature and the yoke of the electromagnet, the relative adjustment of the position of the pairs of pole faces is necessary.
  • the object of the invention is to simplify the adaptation of the pole surface pairs of a DC electromagnet and to compensate for the manufacturing tolerances of the DC electromagnet.
  • the invention is based on the idea that the height of an air gap, which is between a pole plate and a magnetic yoke, is adjustable by displacement of the yoke.
  • An electromagnet consists of a magnetic core, two pole plates and a yoke, wherein the two pole plates are set up as magnet armature in parallel on the magnetic core and the yoke has two flat pole faces for magnetic field shaping.
  • a first air gap is provided between a first pole face and a first pole plate, and a second air gap is provided between a second pole face and a second pole plate.
  • the yoke is formed in two parts such that the height of the first air gap is adjustable by displacement of a first part of the yoke, the first part having the first pole face.
  • the unit When manufacturing such an electromagnet, the unit is pre-assembled from the magnetic core and the pole plates and fixed together.
  • the yoke can still be adjusted after the assembly of the electromagnet to adjust the height of the first air gap.
  • a defined air gap after the construction of the electromagnet can still be adjusted.
  • a magnetic yoke is a punched-bent part and thereby subject to a greater tolerance than the assembly of the magnetic core and the pole plates.
  • a second part of the yoke on the second pole face wherein the two pole faces are aligned in the same direction.
  • a part of the second air gap consists of a plate-shaped, non-magnetic material, wherein the material is between the second pole plate and the second pole face.
  • the part can serve as both an air gap washer and as an air gap spring.
  • the minimum height of the second air gap is determined by the thickness of the part.
  • the minimum height of the second air gap may not be equal to zero in the rule. If the pole plate directly contacts the pole face of the yoke, the pole plate would then stick to the yoke due to the magnetic attraction (ie "sticking"). Then the electromagnet is no longer suitable for DC protection, because it is not switchable.
  • the electromagnet has at least one slide bar, which is provided for sliding the first part of the yoke.
  • the first part has at least one hole for receiving the slide bar, so that the first part for adjusting the height of the first air gap along the slide bar can be moved.
  • a slide bar is usually oriented in the axial direction of the magnetic core.
  • the slide bar and the yoke are formed so that the first part can be moved to a stop position or holder and prevented in this stop position to avoid a sliding line.
  • the first part of the yoke for adjusting the height of the first air gap is adjusted such that the first and the second part of the yoke are slid over each other.
  • the first part can be slid relative to the outside of the second part up to a stop position or holder. Since the two parts contact each other constantly in a large area, the yoke can remain as a whole part firmly.
  • the first part of the yoke for adjusting the height of the first air gap is adjusted such that the first part and the second part are slidable into each other, wherein the first part and the two part interlocked by its respective zigzag edge be connected.
  • the first air gap is set such that the first air gap has the same height as the second air gap.
  • the two air gaps can be considered as a total air gap for the representation of the electromagnet.
  • the total air gap is to be defined as a fixed constant, thereby facilitating the design of a DC drive system.
  • FIG. 1 shows an electromagnet consisting of a magnetic core 6, two pole plates 1, 4 and a yoke 2.
  • the cylindrical magnetic core 6 has an axis in the X direction.
  • the illustrated solenoid is intended to be integrated into a DC circuit breaker to actuate contacts upon excitation and deenergization of a coil 12.
  • the coil 12 is placed in the yoke 2 for energization / magnetization and between the two pole plates 1, 4.
  • the yoke 2 serves as a housing and accommodates the coil 12, wherein the magnetic core 6 can be inserted into the yoke 2 through a hole or a recess of the yoke 2 formed in the yoke.
  • Each pole plate 1, 4 is preferably placed on the end of the magnetic core 6 and fixed thereto, wherein the attachment of the second plate 4 is carried out by welding, but can also be done by tightening, gluing or other similar fastening method.
  • the pole plates 1, 4 are preferably identical.
  • the yoke 2 has two planar pole piece surfaces 25a, 26a.
  • the two pole faces 25a, 26a are aligned in the same direction, with the first pole face 25a being on the inside of the yoke 2, while the second pole face 26a is on the outside of the yoke.
  • a first air gap 5 is formed between the first pole face 25a and the first pole plate 4, and a second air gap 3 is formed between the second pole face 25a and the second pole plate 1.
  • the yoke 2 is designed in two parts, wherein the yoke has a first part 7 with the pulse shoe surface 25a and a second part 8 with the pole shoe surface 26a.
  • the pole face 25a is located on the inside and the pole face 26a on the outside of the yoke 2, the two pole faces 25a, 26a are aligned in the same direction.
  • the first pole plate 4 can be applied on the first pole face 25a and the second pole plate 1 on the second pole face 26a.
  • a part 10 of the second air gap 3 is made of an elastic and nonmagnetic material, such as rubber and lies between the second pole plate 1 and the second pole face 26a.
  • the part 10 is, for example, a U-shaped disc and is mounted by clamping or by snapping onto the second pole plate 1, thereby the part 10 can play both the role of an air gap Unterleg GmbHs and an air gap spring to provide assistance in the fall of the electromagnet ,
  • the minimum height of the second air gap 3 is then determined by the thickness (eg 0.5 mm) of the rubber. If the height of the air gap 3 is equal to zero, the second pole plate 1 with the second part 8 is thus "glued" and the circuit breaker can therefore not be switched.
  • the unit of the magnetic core 6 and the pole plates 1, 4 is pre-assembled and fixed together with the second part 8.
  • the first air gap 5 should be set so that it has a same height as the second air gap 3.
  • the height of the first air gap 5 can be adjusted by displacement of the first part 7 in the X direction.
  • the height of the second air gap 3 is determined by the preassembly of the magnetic core 6, the first pole plate and the second part 8 of the yoke 2, then the same height for the first air gap 5 can be set so that the first part 7 in X- Direction shifted to a stop position and secured by bracket in this stop position.
  • An adaptation of the two air gaps 3, 5 is then easy to achieve. By means of a solenoid produced in this way, the tolerances produced in the production of the electromagnet can still be eliminated or compensated after production without any effort.
  • FIG. 2 an embodiment for an above-mentioned solenoid is shown, wherein the first part 7 and the second part 8 of the yoke 2 are assembled such that the first part 7 is plate-shaped and along the inside of the second part 8 in or out of the yoke 2 is slidable.
  • At least one slide bar 11 is provided for sliding guide of the first part 7 in the electromagnet, while the first part 7 has at least one hole for receiving the slide bar 11.
  • the slide bar 11 may be mounted on one or more rods 22 located between the inner sides of the part 8.
  • the first part 7 can be moved to adjust the height of the first air gap 5 along the slide bar 11.
  • the first part 7 is moved to a stop position or holder and secured in this stop position.
  • the first part 7 can be very stable and evenly adjusted.
  • FIG. 3 shows a further embodiment of the electromagnet, wherein the yoke 2 is designed in two parts, that the first part 7 and the second part 8 of the yoke 2 are slid over each other.
  • the height of the first air gap 5 is adjusted by the sliding guide of the first part 7 along the outside of the second part 8.
  • at least one grid, a plurality of notches or grooves for sliding on the surface of the first and second parts 7, 8 are implanted.
  • FIG. 4 and FIG. 5 Another embodiment of the electromagnet is in FIG. 4 and FIG. 5 shown.
  • the first part 7 and the second part 8 of the yoke 2 are slidable into each other by both parts 7, 8 are connected in each case interlocked by its zigzag edge.
  • the height of the first air gap 5 can also be changed. This is also a space-saving solution for the production of the electromagnet.
  • the magnetic core 6 with the two pole plates 1, 4 and the yoke 2 are capable of relative displacement in the X direction.
  • An electromagnet shown above is used e.g.
  • the pole plates 1, 4 are placed on the magnetic core 6 and fixed thereto so that they are blocked in a certain reference position. Thereafter, they are brought in abutment respectively to the pole faces 25a and 26a of the yoke 2 and fixed to the second part 8 of the yoke 2.
  • the first part 7 of the yoke 2 is then slid in the X direction to adapt the two air gaps 3, 5 to the abutment of the part 10 from the second air gap 3 at the pole face 26a.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)
EP06026504A 2006-12-20 2006-12-20 Electroaimant à courant continu Withdrawn EP1936640A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06026504A EP1936640A1 (fr) 2006-12-20 2006-12-20 Electroaimant à courant continu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06026504A EP1936640A1 (fr) 2006-12-20 2006-12-20 Electroaimant à courant continu

Publications (1)

Publication Number Publication Date
EP1936640A1 true EP1936640A1 (fr) 2008-06-25

Family

ID=37983674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06026504A Withdrawn EP1936640A1 (fr) 2006-12-20 2006-12-20 Electroaimant à courant continu

Country Status (1)

Country Link
EP (1) EP1936640A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020020836A1 (fr) * 2018-07-25 2020-01-30 Staiger Gmbh & Co. Kg Soupape

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321664A2 (fr) * 1987-12-23 1989-06-28 Electric Power Research Institute, Inc Electro-aimant polarisé
GB2216722A (en) * 1988-03-31 1989-10-11 Telemecanique Electrique Electromagnet for actuating switches of contact - maker apparatus
DE19509195A1 (de) * 1995-03-14 1996-09-19 Siemens Ag Gleichstrom-Magnetsystem mit Dauermagnetunterstützung
DE10016318A1 (de) * 1999-04-12 2000-10-19 Schneider Electric Ind Sa Gleichstromelektromagnet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0321664A2 (fr) * 1987-12-23 1989-06-28 Electric Power Research Institute, Inc Electro-aimant polarisé
GB2216722A (en) * 1988-03-31 1989-10-11 Telemecanique Electrique Electromagnet for actuating switches of contact - maker apparatus
DE19509195A1 (de) * 1995-03-14 1996-09-19 Siemens Ag Gleichstrom-Magnetsystem mit Dauermagnetunterstützung
DE10016318A1 (de) * 1999-04-12 2000-10-19 Schneider Electric Ind Sa Gleichstromelektromagnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020020836A1 (fr) * 2018-07-25 2020-01-30 Staiger Gmbh & Co. Kg Soupape

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