GB526014A - Improvements in and relating to electric chokes - Google Patents
Improvements in and relating to electric chokesInfo
- Publication number
- GB526014A GB526014A GB7279/39A GB727939A GB526014A GB 526014 A GB526014 A GB 526014A GB 7279/39 A GB7279/39 A GB 7279/39A GB 727939 A GB727939 A GB 727939A GB 526014 A GB526014 A GB 526014A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cores
- winding
- choke
- delta
- flux
- 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
-
- 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
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
- H01F27/385—Auxiliary core members; Auxiliary coils or windings for reducing harmonics
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
526,014. Inductances. BRITISH THOMSONHOUSTON CO., Ltd. March 6, 1939, No. 7279. Convention date, March 5, 1938. [Class 38(ii)] Relates to a choke arrangement comprising two three-phase chokes I, II, Fig. 2, connected in parallel and having windings connected respectively either in delta and star as shown, or in such a way as to give a similar phase relationship between the. core phases, and employed for reactance compensation in a supply system, the cores being operated near saturation to give an inductance which varies in dependence on the applied. voltage, and consists in suppressing the 3rd, 5th and 7th harmonic fluxes in the cores. In the form shown in Fig. 2, 3rd harmonic flux suppression in the choke I is effected by means of the main delta-connected winding W # and in the choke II by means of an auxiliary delta-connected winding Wk. The separate cores may be replaced by three-three limbed cores, each core having a winding of each group arranged on it. The limb which carries the difference flux may be made smaller. In the form shown in Fig. 3a, each choke is provided with a main winding in delta connection, and the required phase relationship between the fluxes is obtained by connecting the winding U1, VI, W1 to tappings on the windings U, V, W. In a further modification two three-phase cores may be used, the cores preferably having either slotted yokes, reduced middle limbs, or one or more additional limbs to equalize the flux distribution.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE526014X | 1938-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB526014A true GB526014A (en) | 1940-09-09 |
Family
ID=6552808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7279/39A Expired GB526014A (en) | 1938-03-05 | 1939-03-06 | Improvements in and relating to electric chokes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB526014A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779633A1 (en) * | 1995-06-30 | 1997-06-18 | Hitachi Metals, Ltd. | Magnetic core |
| WO2006068495A2 (en) * | 2004-12-23 | 2006-06-29 | Magtech As | Device for reducing harmonics |
| WO2009115460A1 (en) * | 2008-03-17 | 2009-09-24 | Dynamic Dinosaurs B.V. | Transformer |
-
1939
- 1939-03-06 GB GB7279/39A patent/GB526014A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779633A1 (en) * | 1995-06-30 | 1997-06-18 | Hitachi Metals, Ltd. | Magnetic core |
| EP0779633A4 (en) * | 1995-06-30 | 1998-09-30 | Hitachi Metals Ltd | Magnetic core |
| WO2006068495A2 (en) * | 2004-12-23 | 2006-06-29 | Magtech As | Device for reducing harmonics |
| WO2006068495A3 (en) * | 2004-12-23 | 2007-04-19 | Magtech As | Device for reducing harmonics |
| WO2009115460A1 (en) * | 2008-03-17 | 2009-09-24 | Dynamic Dinosaurs B.V. | Transformer |
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