GB506280A - Improvements in or relating to three-phase transformer or choking coil arrangements - Google Patents
Improvements in or relating to three-phase transformer or choking coil arrangementsInfo
- Publication number
- GB506280A GB506280A GB32416/37A GB3241637A GB506280A GB 506280 A GB506280 A GB 506280A GB 32416/37 A GB32416/37 A GB 32416/37A GB 3241637 A GB3241637 A GB 3241637A GB 506280 A GB506280 A GB 506280A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phase
- fluxes
- core
- further modification
- limb
- 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
- H01F27/38—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)
- Coils Of Transformers For General Uses (AREA)
Abstract
506,280. Transformers and inductances. SIEMENS-SCHUCKERTWERKE AKT.-GES. Nov. 24, 1937, Nos. 32416 and 32417. Convention dates, Nov. 24, 1936 and Feb. 27, 1937. [Class 38 (ii)] To suppress harmonics such as the 5th and 7th in a 3-phase transformer or choking coil, the arrangement is such that three or more 3-phase flux systems of fundamental frequency are produced which are displaced by angles alpha1, alpha2, &c. with respect to each other and in which the vectors polygon formed by the fluxes multiplied by the associated magnetising force and iron path length and displaced through Kalpha1, Kalpha2, &c., where K is a number divisible by 6 and lying between two adjacent odd harmonics other than the third and multiples thereof, is closed. As shown in Fig. 3 each limb of a three-phase core is split into three sections by slots and the main fluxes in those sections produced by the main winding 1 are displaced with respect to each other by means of auxiliary windings 2, 3, 4, 5 connected in star and delta. These auxiliary windings arc dimensioned to force a phase displacement of e.g. 20‹ The arrangement is designed so that the voltages produced in the main winding when phase displaced by the phase angle multiplied by the number divisible by six nearest to the harmonic form a closed polygon. In a modification, instead of a slotted core, three cores arranged side-by-side are used. In a further modification shown in Fig. 9 each core limb has a single slot, the three-phase displaced fluxes for each phase being comprised by Ua, Ub and Uc. In a modification of this the slots are arranged at the comers of the core. A further modification is shown in Fig. 15 in which the flux division is obtained by slotting the yoke, the three groups of three phase fluxes being U, V, W; Ua, Va, Wa and Uc, Vc, Wc, of which Wa and Wc each have two components. In a further modification the three sets of three-phase fluxes are obtained by means of three single-phase three-limbed cores. Fig. 24 shows an arrangement in which four sets of three-phase fluxes are obtained. The core is formed by two sections, each limb being slotted so as to form for each phase 4 elements a-d. A further modification is shown in Fig. 25 in wh:ch the four fluxes a-d per phase is obtained by double slotting each limb. In a further modification a four-flux system s obtained by means of a five-limb core with the three main limbs slotted, the fourth set of fluxes being formed by the fluxes in the outer limbs and yokes. A further modification is shown n Fig. 32 in which three groups of fluxes are obtained by slotting the yokes, orie yoke having two slots. Various connections of auxiliary windings for flux distribution are described. Short-circuited conductor bars 25, 26 which may be folded over as shown at 42, Fig. 37 may be provided to reduce leakage across the slots.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE506280X | 1936-11-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB506280A true GB506280A (en) | 1939-05-24 |
Family
ID=6546522
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32416/37A Expired GB506280A (en) | 1936-11-24 | 1937-11-24 | Improvements in or relating to three-phase transformer or choking coil arrangements |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB506280A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005119892A1 (en) * | 2004-06-04 | 2005-12-15 | Wärtsilä Automation Norway As | Low loss propulsion system |
WO2011154058A1 (en) * | 2010-06-10 | 2011-12-15 | Schaffner Emv Ag | Integrated magnetic device for low harmonics three-phase front-end |
WO2017117620A1 (en) * | 2016-01-05 | 2017-07-13 | Alexander Schneider | Compressed air energy storage plant |
CN108231366A (en) * | 2017-12-29 | 2018-06-29 | 上海意兰可电力电子设备有限公司 | Three-phase high frequency transformer |
-
1937
- 1937-11-24 GB GB32416/37A patent/GB506280A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005119892A1 (en) * | 2004-06-04 | 2005-12-15 | Wärtsilä Automation Norway As | Low loss propulsion system |
US7514898B2 (en) | 2004-06-04 | 2009-04-07 | Wartsila Norway As | Low loss propulsion system |
WO2011154058A1 (en) * | 2010-06-10 | 2011-12-15 | Schaffner Emv Ag | Integrated magnetic device for low harmonics three-phase front-end |
US8890642B2 (en) | 2010-06-10 | 2014-11-18 | Schaffner Emv Ag | Integrated magnetic device for low harmonics three-phase front-end |
WO2017117620A1 (en) * | 2016-01-05 | 2017-07-13 | Alexander Schneider | Compressed air energy storage plant |
EP3790176A1 (en) * | 2016-01-05 | 2021-03-10 | Alexander Schneider | Compressed air storage power plant |
CN108231366A (en) * | 2017-12-29 | 2018-06-29 | 上海意兰可电力电子设备有限公司 | Three-phase high frequency transformer |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB805721A (en) | Improvements in or relating to three-phase magnetic circuits | |
US3611224A (en) | Controllable reactive current generator | |
GB506280A (en) | Improvements in or relating to three-phase transformer or choking coil arrangements | |
US4058761A (en) | Saturated reactors | |
US1891178A (en) | Electric transformer | |
US1706139A (en) | Current transformer | |
GB495370A (en) | Improvements in or relating to three-phase transformers and three-phase choking coils | |
GB583627A (en) | A direct current energised reactor for multiphase current | |
US2357098A (en) | Transformer | |
GB423618A (en) | Improvements in and relating to electric transformers and choking coils | |
DE737433C (en) | Arrangement for testing the switching capacity of high-performance electrical switchgear | |
GB448341A (en) | Improvements in frequency changing arrangements for supplying high-speed rotary field motors | |
US1836615A (en) | Transformer for electric arc cutting and welding apparatus | |
US1870272A (en) | Alternating current motor | |
JPS60131041A (en) | Polyphase armature winding | |
GB613045A (en) | Improvements in or relating to transformers | |
US1794246A (en) | Electrical apparatus | |
US2287990A (en) | Zero sequence isolator | |
US1475968A (en) | Best available | |
GB497064A (en) | Improvements in and relating to electric transformers | |
US3048765A (en) | Frequency multiplier system | |
SU1053240A1 (en) | Three-directional a.c.-to-d.c. voltage converter | |
GB507755A (en) | Improvements in or relating to polyphase transformers and polyphase choking coils | |
JPS56166737A (en) | Polyphase ac armature coil | |
GB725372A (en) | Improvements in or relating to electromagnetic induction apparatus |