GB1518938A - Variable electrical choke - Google Patents

Variable electrical choke

Info

Publication number
GB1518938A
GB1518938A GB4101274A GB4101274A GB1518938A GB 1518938 A GB1518938 A GB 1518938A GB 4101274 A GB4101274 A GB 4101274A GB 4101274 A GB4101274 A GB 4101274A GB 1518938 A GB1518938 A GB 1518938A
Authority
GB
United Kingdom
Prior art keywords
members
threads
choke
sept
alter
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
Application number
GB4101274A
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.)
Simms Group Research and Development Ltd
Original Assignee
Simms Group Research and Development Ltd
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 Simms Group Research and Development Ltd filed Critical Simms Group Research and Development Ltd
Priority to GB4101274A priority Critical patent/GB1518938A/en
Priority to FR7528785A priority patent/FR2309964A1/en
Priority to FR7614896A priority patent/FR2300404A1/en
Publication of GB1518938A publication Critical patent/GB1518938A/en
Expired legal-status Critical Current

Links

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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with 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
    • H01F27/2823—Wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/08—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators
    • H01F29/10—Variable transformers or inductances not covered by group H01F21/00 with core, coil, winding, or shield movable to offset variation of voltage or phase shift, e.g. induction regulators having movable part of magnetic circuit

Abstract

1518938 Inductors SIMMS GROUP RESEARCH & DEVELOPMENT Ltd 17 Sept 1975 [20 Sept 1974] 41012/74 Heading H1T A choke comprises a pair of threaded members 10, 11 or 19, 20 with threads of complementary pitch but different diameters so that at least for a limited relative rotation they do not engage and no axial displacement occurs, and a winding 15, 16 or 18 wound so that on passing a current, flux flows through the threaded members and through the air gap between their respective threads. The members are held against relative axial movement but may be rotated one relative to the other to alter the dimensions of the air gap and thereby alter the inductance of the choke. Fig. 2 shows a pair of members having two-start threads, the inner member bearing a winding in which the current through adjacent turns flows in opposite directions. Angular adjustment may be by means of a pinion 12 and worm drive. A thread with a multiple of two starts may also be used.
GB4101274A 1974-09-20 1974-09-20 Variable electrical choke Expired GB1518938A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4101274A GB1518938A (en) 1974-09-20 1974-09-20 Variable electrical choke
FR7528785A FR2309964A1 (en) 1974-09-20 1975-09-19 ELECTRIC INDUCTION COIL
FR7614896A FR2300404A1 (en) 1974-09-20 1976-05-18 ELECTRIC INDUCTION COIL

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4101274A GB1518938A (en) 1974-09-20 1974-09-20 Variable electrical choke

Publications (1)

Publication Number Publication Date
GB1518938A true GB1518938A (en) 1978-07-26

Family

ID=10417691

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4101274A Expired GB1518938A (en) 1974-09-20 1974-09-20 Variable electrical choke

Country Status (2)

Country Link
FR (2) FR2309964A1 (en)
GB (1) GB1518938A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0570666A1 (en) * 1992-05-07 1993-11-24 TDK Corporation Variable inductance coil device
CN108376605A (en) * 2017-01-30 2018-08-07 发那科株式会社 Multiphase iron core reactor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336592A (en) * 1971-07-12 1973-11-07 Denton J Ltd Electrical coils and methods of making same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0570666A1 (en) * 1992-05-07 1993-11-24 TDK Corporation Variable inductance coil device
US5347255A (en) * 1992-05-07 1994-09-13 Tdk Corporation Variable inductance coil device
CN108376605A (en) * 2017-01-30 2018-08-07 发那科株式会社 Multiphase iron core reactor
CN108376605B (en) * 2017-01-30 2022-06-21 发那科株式会社 Multiphase iron core reactor

Also Published As

Publication number Publication date
FR2300404A1 (en) 1976-09-03
FR2300404B1 (en) 1979-09-21
FR2309964B1 (en) 1983-05-20
FR2309964A1 (en) 1976-11-26

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee