US3784946A - Smoothing choke - Google Patents

Smoothing choke Download PDF

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Publication number
US3784946A
US3784946A US00335930A US3784946DA US3784946A US 3784946 A US3784946 A US 3784946A US 00335930 A US00335930 A US 00335930A US 3784946D A US3784946D A US 3784946DA US 3784946 A US3784946 A US 3784946A
Authority
US
United States
Prior art keywords
core
choke
smoothing choke
turns
smoothing
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.)
Expired - Lifetime
Application number
US00335930A
Other languages
English (en)
Inventor
Jacques Van Hulse
Roald Bingen
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.)
Umicore NV SA
Original Assignee
ACEC SA
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 ACEC SA filed Critical ACEC SA
Application granted granted Critical
Publication of US3784946A publication Critical patent/US3784946A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F37/00—Fixed inductances not covered by group H01F17/00

Definitions

  • the smoothing choke consists of a magnetic core made up of a stock of trapezoidal metal sheets having the two parallel sides thereof alternately reversed so as to obtain a core of general parallepipedal shape having, at each end thereof, a groove in the shape of a triangular prism.
  • a coil is wound around the core and has outer turns the perimeter of which is successively reduced by step-like winding, from the turns around the central part of the core, symmetrically, to the turns around the ends of the latter.
  • the present invention relates to self-induction coils with open-magnetic circuit and, in particular, to smoothing chokes useful in current regulating electronic apparatus for regulating the feed-current of impulse working traction motors.
  • the invention concerns a smoothing choke, of highly reduced weight, which is most important for an apparatus set up in a vehicle.
  • a first means for obtaining a substantial reduction in the weight of a coil of this type consists in using a magnetic core made up of a stack of trapezoidal metallic sheets the two parallel sides of which are alternatively reversed so as to obtain a core of a generally parallelepiped form having, at each end, a groove in the shape of a triangular prism.
  • these grooves do not substantially change the induction coefficient of a coil placed around the core as compared to the coefficient that would be obtained if the core were a complete rectangular parallelepiped.
  • FIG. 1 is a perspective view of a core made up of a stack of metallic sheets in accordance with the invention
  • FIG. 2 is an elevation view of a smoothing choke with the magnetic core of FIG. 1.
  • FIG. 1 show a core made up of a stack of trapezoidal metal sheets 1 and 2, alternatively disposed, the parallel sides of which are super imposed, the larger side of one fallowing the smaller side of the other and vice versa; for the sake of clarity, these are shown separated from one to the other.
  • the sheets 1 and 2 are identical and made from a strip having a width 1; the end edges of which are symetrically cut out at 45 with respect to the parallel edges of the strip.
  • the production cost is also proportionally reduced because of the lesser weight of sheets used and of the bevelling thereof which avoids any loss.
  • FIG. 2 is a cross-section view of a smoothing choke equiped with the magnetic core shown in FIG. 1.
  • a coil 3 the turns of which are in step-like formation symmetrically on either side of a central part with respect to a median plane which is perpendicular to the core so that the outer turns progressively get shorter as they move away from the central portion.
  • the chokes shown in FIG. 2 may be secured by means of wedge-like member 4 and 5 fitting into the prismatic grooves at the ends of the core and assembled by rods 6 secured to transverse members 7 and 8.
  • the foregoing combination is thus quite resistant to vibrations.
  • the smoothing choke described above which has a stary field of little scathering beyond the winding may be covered with a steel split housing, not shown, used as a magnetic screen and capable of acting as a ventilation flue.
  • a smoothing choke comprising a magnetic core made up of a stack of metal sheets having the two parallel sides thereof alternately reversed, said core having at each end thereof a groove in the form of a triangular prism;
  • each of said metal sheets is trapezoidal.
  • a smoothing choke comprising:

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
US00335930A 1972-02-25 1973-02-26 Smoothing choke Expired - Lifetime US3784946A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE779905A BE779905A (fr) 1972-02-25 1972-02-25 Noyau magnetique pour self de lissage.
BE780293A BE780293A (fr) 1972-02-25 1972-03-07 Self de lissage.

Publications (1)

Publication Number Publication Date
US3784946A true US3784946A (en) 1974-01-08

Family

ID=25656991

Family Applications (1)

Application Number Title Priority Date Filing Date
US00335930A Expired - Lifetime US3784946A (en) 1972-02-25 1973-02-26 Smoothing choke

Country Status (8)

Country Link
US (1) US3784946A (de)
BE (2) BE779905A (de)
CA (1) CA1002622A (de)
DE (1) DE2308795C3 (de)
FR (1) FR2173171A1 (de)
IT (1) IT977489B (de)
NL (1) NL178204C (de)
SE (1) SE385518B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210858A (en) * 1978-04-19 1980-07-01 International Business Machines Corporation High frequency high voltage power supply
US5818226A (en) * 1995-09-29 1998-10-06 Sony Corporation Magnetic sensor having a coil with varying turns along the length of a bobbin

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028605C2 (de) * 1980-07-28 1983-10-27 Transformatoren Union Ag, 7000 Stuttgart Vorrichtung zum Schichten von Kernen für Transformatoren und Drosselspulen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU254616A (en) * 1916-11-13 1917-11-20 Box. Harry Stephen Wood Tevah Improved method of and plant for treating or destroying house or towns' refuse, and (or) brown coal and recovering the useful constituents thereof
US1260743A (en) * 1909-07-29 1918-03-26 Elektro Sparlicht Ges Deutsche Transformer and method of making the same.
US1540789A (en) * 1924-04-07 1925-06-09 Claude M Mccord Testing transformer
US3246273A (en) * 1963-12-05 1966-04-12 Gen Electric Canada Yoke held coil support for electrical reactor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR949896A (fr) * 1944-06-01 1949-09-12 Thomson Houston Comp Francaise Nouveau procédé de construction de noyaux feuilletés pour appareils électro-magnétiques à induction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1260743A (en) * 1909-07-29 1918-03-26 Elektro Sparlicht Ges Deutsche Transformer and method of making the same.
AU254616A (en) * 1916-11-13 1917-11-20 Box. Harry Stephen Wood Tevah Improved method of and plant for treating or destroying house or towns' refuse, and (or) brown coal and recovering the useful constituents thereof
US1540789A (en) * 1924-04-07 1925-06-09 Claude M Mccord Testing transformer
US3246273A (en) * 1963-12-05 1966-04-12 Gen Electric Canada Yoke held coil support for electrical reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210858A (en) * 1978-04-19 1980-07-01 International Business Machines Corporation High frequency high voltage power supply
US5818226A (en) * 1995-09-29 1998-10-06 Sony Corporation Magnetic sensor having a coil with varying turns along the length of a bobbin

Also Published As

Publication number Publication date
BE780293A (fr) 1972-09-07
FR2173171A1 (fr) 1973-10-05
BE779905A (fr) 1972-08-25
DE2308795A1 (de) 1973-08-30
CA1002622A (en) 1976-12-28
IT977489B (it) 1974-09-10
NL178204B (nl) 1985-09-02
SE385518B (sv) 1976-07-05
FR2173171B1 (de) 1977-09-02
DE2308795C3 (de) 1980-06-04
NL178204C (nl) 1986-02-03
DE2308795B2 (de) 1979-09-20
NL7302538A (de) 1973-08-28

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