GB1090376A - Improvements in or relating to rotary frequency changers - Google Patents
Improvements in or relating to rotary frequency changersInfo
- Publication number
- GB1090376A GB1090376A GB4738764A GB4738764A GB1090376A GB 1090376 A GB1090376 A GB 1090376A GB 4738764 A GB4738764 A GB 4738764A GB 4738764 A GB4738764 A GB 4738764A GB 1090376 A GB1090376 A GB 1090376A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole
- winding
- excitation
- rotor
- star
- 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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K47/00—Dynamo-electric converters
- H02K47/18—AC/AC converters
- H02K47/22—Single-armature frequency converters with or without phase-number conversion
- H02K47/24—Single-armature frequency converters with or without phase-number conversion having windings for different numbers of poles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
Abstract
1,090,376. Pole-changing windings for dynamo-electric machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Oct. 19, 1965 [Nov. 20, 1964], No. 47387/64. Heading H2A. In a three-phase, pole-changing winding providing first and second pole-numbers simultaneously, each phase is divided into two sections 17, 18; 19, 20; and 21, 22, respectively, which are connected in a closed circuit carrying D.C. excitation from a source 43 and providing a first pole-number field and having a high impedance to the second pole-mumber. The winding acts as a double-star winding of the second pole-number at terminals 7, 8 and 9. The winding is intended for use in a self-driving frequency-changer similar to that described in Specification 1,050,018, the D.C. excitation serving to prevent frequency droop, due to slip, on load. The winding is of P.A.M. type, and may be on primary or secondary member, or both. A star-point may be obtained by tapping the D.C. source (Fig. 4, not shown) or by a capacitance divider (Fig. 5, not shown). Stator and rotor may each carry primary and secondary windings of different pole-numbers (Figs. 9, 10, not shown) to avoid the use of brushes, D.C. excitation being provided by rectifiers mounted on the rotor.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4738764A GB1090376A (en) | 1964-11-20 | 1964-11-20 | Improvements in or relating to rotary frequency changers |
FR38601A FR1459452A (en) | 1964-11-20 | 1965-11-16 | Improvements to rotary frequency changers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4738764A GB1090376A (en) | 1964-11-20 | 1964-11-20 | Improvements in or relating to rotary frequency changers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1090376A true GB1090376A (en) | 1967-11-08 |
Family
ID=10444781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4738764A Expired GB1090376A (en) | 1964-11-20 | 1964-11-20 | Improvements in or relating to rotary frequency changers |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1459452A (en) |
GB (1) | GB1090376A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4117154A1 (en) * | 2021-07-08 | 2023-01-11 | Hamilton Sundstrand Corporation | Exciter windings for wide speed operation |
-
1964
- 1964-11-20 GB GB4738764A patent/GB1090376A/en not_active Expired
-
1965
- 1965-11-16 FR FR38601A patent/FR1459452A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4117154A1 (en) * | 2021-07-08 | 2023-01-11 | Hamilton Sundstrand Corporation | Exciter windings for wide speed operation |
US11936252B2 (en) | 2021-07-08 | 2024-03-19 | Hamilton Sundstrand Corporation (HSC) | Exciter windings for wide speed operation |
Also Published As
Publication number | Publication date |
---|---|
FR1459452A (en) | 1966-04-29 |
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