US3808562A - Filter choke - Google Patents

Filter choke Download PDF

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Publication number
US3808562A
US3808562A US00365191A US36519173A US3808562A US 3808562 A US3808562 A US 3808562A US 00365191 A US00365191 A US 00365191A US 36519173 A US36519173 A US 36519173A US 3808562 A US3808562 A US 3808562A
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US
United States
Prior art keywords
choke coil
active resistance
resistance element
choke
coils
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
US00365191A
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English (en)
Inventor
G Weigel
H Linnert
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union 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 Transformatoren Union AG filed Critical Transformatoren Union AG
Application granted granted Critical
Publication of US3808562A publication Critical patent/US3808562A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01F37/005—Fixed inductances not covered by group H01F17/00 without magnetic core
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse

Definitions

  • ABSTRACT A filter choke capable of handling high power levels 7 and including a coolant-filled tank, a choke coil and an active resistance element which is connected in parallel with the choke coil.
  • the active resistance element and the choke coil are both arranged within the tank.
  • the choke coil is constructed in the form of tubular coils.
  • the active resistance element includes two coils, as one'piece, constructed in the form of a tubular coil and wound in respectively opposite directions so that the active resistance element is magnetically neutral.
  • the choke coil is concentrically disposed within the active resistance element.
  • the present invention relates to filter chokes capable of handling high power-outputs and including a choke coil and a parallel connected active resistance element both of which are contained in a coolant-filled tank.
  • filter chokes are required to suppress the harmonics.
  • the filters therefore, have to be designed to be capable of handling high power outputs. Since the employed active material can be satisfactorily utilized only if it isintensively cooled, such electrical components are usually built inside coolant-filled tanks.
  • the coolant which is preferably utilized in such tanks is transformer oil which simultaneously serves as an insulating material.
  • the effective utilization of space and material was a comparatively insignificant problem so that the choke coil and the active resistance, which is connected in parallel with the coil, could be arranged next to one another in the same tank. This solution, however, is both unsatisfactory and very uneconomical when higher power outputs must be handled because of the considerable space and material requirements involved.
  • An object of the presentinvention is to provide a filter choke for handling higher outputs which optimally utilizes the employed material and the space it occupies. r
  • the choke coil and the active resistance element are provided as annular coils with the active resistance element including two coils wound in respectively opposite directions, i.e. the active resistance element is a double wound coil, was to be magnetically neutral and that the choke coil is concentrically disposed within the active resistance element.
  • the choke coil is centered within the active resistance element by being clamped between a set of insulating rings and the'choke coil and the active'resistance element are held in position in the coolant-filled tank by a compression device.
  • the choke coil and the double wound coil of the active resistance can be constructed of disc coils, with the disc coils of the active resistance being made of a nonmagnetic material.
  • a further embodiment of the present invention provides that the upper ends of the coils which are perpendicularly arranged within the tank, are connected with the high-voltage terminal and the lower ends of the coils are connected with the low-voltage terminal.
  • the filter choke according to the present invention is highly advantageous since it permits the filter choke to be constructed as a very compact structure and makes effective utilization of the employed materials. These advantages are obtainable because the active resistance element which spatially encloses the choke coil is double wound and made of a nonmagnetic material so that the resistance element will neither build up a magnetic field itself nor noticeably influence the magnetic field traversing the choke coil. Furthermore, the windings of the active resistance element simultaneously serve as an electrical shield for the choke coil.
  • FIG. '1 is an elevational, cross-sectional view of a filter choke according to the present invention.
  • FIG. 2 is a top plan view of the filter choke shown in FIG. 1.
  • FIG. 3 is a cross-sectional view along lines A-A of the filter choke shown in FIG. 1.
  • FIG. 4a shows the connection of the disc winding of the active resistance.
  • FIG. 4b is a current flow diagram for one of the disc coils shown in FIG. 4a.
  • FIG. 5a shows the connection of the disc winding of the choke coil.
  • FIG. 5b is a current flow diagram for one of the disc coils shown in FIG. 5a.
  • an active resistance 2 which is also constructed of disc coils.
  • the choke coil 1 and the active resistance 2 are electrically connected in parallel. Insulating rings 8 are utilized to center and hold the choke coil 1 in place within the active resistance 2.
  • Both the choke coil 1 and the active resistance 2 are arranged within a coolant-filled tank 3.
  • the double winding of the resistance disc coil providing two windings which are wound in respectively opposite directions about the coil is shown in FIG. 4.
  • the choke coil 1 with its associated insulating rings 8 and the coils of the active resistance 2 are maintained in place by a compression force applied in an axial direction by upper and lower plates 9 and 9, connected together by tension rods 10.
  • the disc coils which are utilized for constructing the active resistance 2 are double wound and made of a nonmagnetic material so that current passing through the active resistance 2 neither generates a magnetic field nor noticeably influences a foreign magnetic field, i.e. the active resistance is magnetically neutral.
  • the disc coils utilized for the active resistance and the choke coil 1 are described in detail below with respect to FIGS. 4 and 5, respectively.
  • the active resistance 2 is constructed of a plurality of bifilarly wound disc coils 13. One half of the windings of each disc coil 13 is wound in one direction while the other half of the windings is wound in the opposite direction so that the disc coils 13, both individually and collectively, are unable to create any magnetic flux, i.e. the active resistance is magnetically neutral.
  • the respectivedirections of the current in the windings of the disc coils 13 are indicated by the arrows on the current flow diagram of FIG. 4b.
  • the choke coil 1 is also constructed of a plurality of disc coils 14, as shown in the sectional view of FIG. 5a.
  • each pair of adjacent disc coils, 14, are interconnected so as to form a double coil disc.
  • These double coil discs are electrically connected in series and form the choke coil 1.
  • the current in all of the disc coils flows in the same direction as shown by the current diagram of FIG. 5b, thereby creating a magnetic field.
  • the structure of the coils in the form of disc coils provides a favorable voltage distribution which is identical in both coils, it is advantageous to provide insulating cylinders 1 1 in the annular gap between the choke coil 1 and the active resistance 2.
  • the lower plate 9 of the compression device is disposed on the bottom of the tank 3.
  • the side walls of tank 3 are provided around the entire perimeter with heat exchange fins 7 for cooling the coolant contained in the tank 3, which coolant, for example, can be transformer oil.
  • the top of tank 3 is covered by a cover 6 which is provided with a highvoltage terminal 4 for connection to the high-voltage line and a low-voltage terminal 5 for connection to the low-voltage line.
  • the tank 3 is supported on legs 12. Both tank 3 and its associated cover 6 are preferably made of aluminum sheets or of steel sheets with aluminum shielding.
  • the high-voltage terminal is connected to the upper end of the choke coil 1 and the active resistance 2 so that the high voltage is applied at the furthest possible distance from ground in order to help eliminate arcing problems.
  • the low-voltage terminal can be connected to the lower end of the choke coil 1 and the active resistance 2 since with low voltages arcing is less likely.
  • the electrical connections between the highvoltage terminal 4 on the one hand and the choke coil 1, the active resistance 2 and finally the low-voltage terminal 5 on the other hand are shown by dot-dash lines in FIG. 1.
  • the number of windings in the various coils, the wire sizes, and the number of disc coils will be selected according to well-known formulas on the basis of the anticipated current and voltage levels and the desired inductance value for choke coil 1.
  • a filter choke capable of handling high power outputs and including a coolant-filled tank, a choke coil and an active resistance element connected in parallel with the choke coil, the active resistance element and the choke coil both being arranged within the tank, the improvement wherein said choke coil is in the form of annular coils, said active resistance element includes two coils in the form of annular coils wound in respectively opposite directions so as to be magnetically neutral, and said choke coil is concentrically disposed within said active resistance element.
  • a filter choke as defined in claim 1 further comprising: two insulating rings, one of said insulating rings being positioned adjacent one axial end surface of said choke coil and the other of said insulating rings positioned adjacent the other axial end surface of said choke coil for centering said choke coil within said active resistance; and compression means holding said active resistance and said choke coil with said insulating rings in said tank.
  • a filter choke as defined in claim 4 wherein said active resistance element and said choke coil are arranged within said tank so as to be adapted to be vertically oriented and further comprising a high-voltage terminal connected to the upper ends of said choke coil and said active resistance element and a low-voltage terminal connected to the lower ends of said choke coil and said active resistance element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Peptides Or Proteins (AREA)
  • Filters And Equalizers (AREA)
US00365191A 1972-05-31 1973-05-30 Filter choke Expired - Lifetime US3808562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2226512A DE2226512C3 (de) 1972-05-31 1972-05-31 Filterkreisdrossel

Publications (1)

Publication Number Publication Date
US3808562A true US3808562A (en) 1974-04-30

Family

ID=5846450

Family Applications (1)

Application Number Title Priority Date Filing Date
US00365191A Expired - Lifetime US3808562A (en) 1972-05-31 1973-05-30 Filter choke

Country Status (12)

Country Link
US (1) US3808562A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT319392B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE799242A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1000374A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH549861A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2226512C3 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DK (1) DK141858C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2186716B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1420238A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL7307532A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO132117C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE381950B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105007A (en) * 1976-04-02 1978-08-08 Masayoshi Mochimaru Device for suppressing ignition noise
EP0529905A1 (en) * 1991-08-30 1993-03-03 Bba Canada Limited High energy dissipation harmonic filter reactor
US20110205007A1 (en) * 2008-12-25 2011-08-25 Mitsubishi Electric Corporation Transformer device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5877218A (ja) * 1981-10-31 1983-05-10 Toshiba Corp 油入電気機器用タンクの製造方法
FR2554272B1 (fr) * 1983-10-26 1985-12-27 Schaff Jean Paul Bobine de self-inductance pour la protection d'installations electriques et electroniques fragiles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1146592A (en) * 1915-01-09 1915-07-13 Edwin F Northrup Resistance.
US2088454A (en) * 1935-08-02 1937-07-27 Sign Animation Corp Radiation elimination

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR689650A (fr) * 1929-03-07 1930-09-09 Brown Bobine de réactance sans fer pour la protection contre les surintensités
US3270305A (en) * 1965-03-18 1966-08-30 Gen Electric Shielded housing with vibration control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1146592A (en) * 1915-01-09 1915-07-13 Edwin F Northrup Resistance.
US2088454A (en) * 1935-08-02 1937-07-27 Sign Animation Corp Radiation elimination

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105007A (en) * 1976-04-02 1978-08-08 Masayoshi Mochimaru Device for suppressing ignition noise
EP0529905A1 (en) * 1991-08-30 1993-03-03 Bba Canada Limited High energy dissipation harmonic filter reactor
US5202584A (en) * 1991-08-30 1993-04-13 Bba Canada Limited High energy dissipation harmonic filter reactor
US20110205007A1 (en) * 2008-12-25 2011-08-25 Mitsubishi Electric Corporation Transformer device
US8274351B2 (en) * 2008-12-25 2012-09-25 Mitsubishi Electric Corporation Transformer device

Also Published As

Publication number Publication date
GB1420238A (en) 1976-01-07
FR2186716A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-01-11
SE381950B (sv) 1975-12-22
DE2226512C3 (de) 1975-05-15
DE2226512B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-08-08
NL7307532A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-12-04
AT319392B (de) 1974-12-27
BE799242A (fr) 1973-08-31
DK141858C (da) 1980-11-17
CH549861A (de) 1974-05-31
NO132117B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-06-09
DK141858B (da) 1980-06-30
DE2226512A1 (de) 1973-12-06
FR2186716B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1978-06-30
CA1000374A (en) 1976-11-23
NO132117C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-09-17

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