GB1220151A - Magnetically screened inductance devices - Google Patents
Magnetically screened inductance devicesInfo
- Publication number
- GB1220151A GB1220151A GB7825/68A GB782568A GB1220151A GB 1220151 A GB1220151 A GB 1220151A GB 7825/68 A GB7825/68 A GB 7825/68A GB 782568 A GB782568 A GB 782568A GB 1220151 A GB1220151 A GB 1220151A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- windings
- around
- feb
- core
- 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
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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/361—Electric or magnetic shields or screens made of combinations of electrically conductive material and ferromagnetic material
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
1,220,151. Screening device. ADVANCE ELECTRONICS Ltd. 14 Feb., 1969 [16 Feb., 1968], No. 7825/68. Heading H1T. Around a ferromagnetic core 2 carrying windings (3) is disposed a further short circuited winding 6 linking the leakage flux, and a ferromagnetic member 7 around the winding 6 providing a return flux path for the field produced by the winding 6. There may be a plurality of alternate layers of windings 6 and members 7. The winding 6 is preferably of copper sheet. The member 7 may be one or more turns of sheet material such as silicon iron wrapped around the core and secured by means of a strap, adhesive, or welding. The windings (3) may be carried on a bobbin 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7825/68A GB1220151A (en) | 1968-02-16 | 1968-02-16 | Magnetically screened inductance devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7825/68A GB1220151A (en) | 1968-02-16 | 1968-02-16 | Magnetically screened inductance devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1220151A true GB1220151A (en) | 1971-01-20 |
Family
ID=9840483
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7825/68A Expired GB1220151A (en) | 1968-02-16 | 1968-02-16 | Magnetically screened inductance devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1220151A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509083A1 (en) * | 1981-07-04 | 1983-01-07 | Philips Nv | TRANSFORMER WITH MAGNETIC SHIELDING |
EP0081111A1 (en) * | 1981-12-04 | 1983-06-15 | Licentia Patent-Verwaltungs-GmbH | Transformer, particularly for a switching mode power supply circuit in a television receiver |
GB2165705A (en) * | 1984-10-17 | 1986-04-16 | David John Martin | Starter noise reduction devices for fluorescent lamp ballast inductors |
EP0256583A1 (en) * | 1986-08-16 | 1988-02-24 | Philips Patentverwaltung GmbH | Transformer with a magnetic shield |
WO2007136307A1 (en) * | 2006-05-19 | 2007-11-29 | Abb Technology Ltd. | Reactor shield |
-
1968
- 1968-02-16 GB GB7825/68A patent/GB1220151A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2509083A1 (en) * | 1981-07-04 | 1983-01-07 | Philips Nv | TRANSFORMER WITH MAGNETIC SHIELDING |
EP0081111A1 (en) * | 1981-12-04 | 1983-06-15 | Licentia Patent-Verwaltungs-GmbH | Transformer, particularly for a switching mode power supply circuit in a television receiver |
GB2165705A (en) * | 1984-10-17 | 1986-04-16 | David John Martin | Starter noise reduction devices for fluorescent lamp ballast inductors |
EP0256583A1 (en) * | 1986-08-16 | 1988-02-24 | Philips Patentverwaltung GmbH | Transformer with a magnetic shield |
WO2007136307A1 (en) * | 2006-05-19 | 2007-11-29 | Abb Technology Ltd. | Reactor shield |
CN101443861B (en) * | 2006-05-19 | 2011-09-28 | Abb技术有限公司 | Shield for reactor |
US8659380B2 (en) | 2006-05-19 | 2014-02-25 | Abb Technology Ltd. | Reactor shield |
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