GB320931A - Improvements in or relating to induction dynamo-electric machines - Google Patents
Improvements in or relating to induction dynamo-electric machinesInfo
- Publication number
- GB320931A GB320931A GB2161528A GB2161528A GB320931A GB 320931 A GB320931 A GB 320931A GB 2161528 A GB2161528 A GB 2161528A GB 2161528 A GB2161528 A GB 2161528A GB 320931 A GB320931 A GB 320931A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- stator
- rotor
- machines
- magneto
- 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
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/34—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter
- H02K17/36—Cascade arrangement of an asynchronous motor with another dynamo-electric motor or converter with another asynchronous induction motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
320,931. Gill, J. F., and Chaviara, J. N. July 25, 1928. Alternating - current induction machines.- For power-factor improvement in induction motors or generators of the type consisting of two rotors, coupled both electrically and mechanically and giving equal or different voltages and equal currents, and two stators directly connected in series or parallel to a common supply, the ratio of stator to rotor ampere turns on load in the two machines is made respectively greater and less than unity and the k.v.a. capacity of the machine with the smaller ratio is made greater than that of the other; in addition, the two machines operate at different flux densities and stator magneto-motive forces, the machine which has the higher density and magneto-motive force having a lower k.v.a. capacity than the other one. The Specification describes, with the aid of vector diagrams, the actions in such a pair of coupled motors whereby one part is caused to act as a normal motor and the other as an under-excited machine so that the leading wattless k.v.a. in the one compensates the lagging k.v.a. in the other. Fig. 4 shows in outline a squirrel-cage machine in which the two portions a<1>, b<1> of the rotor are separate and carry a common cage. The stator element b, which has a magneto-motive force greater than that of its rotor, has a greater number of turns than the other stator a, this being effected by employing two sets of star-connected series-wound turns one of which is wound around the stator b only and the other around both stators in a 3-phase star system. The total k.v.a. rating of the machine a, a<1> is greater than that of the machine b, b<1> but per unit length of rotor it is less. In place of using a single machine divided into two parts as in Fig. 4, two separate machines may be employed with their slip-ring rotors mechanically and electrically coupled. Specifications 9534/00 and 6956/09 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2161528A GB320931A (en) | 1928-07-25 | 1928-07-25 | Improvements in or relating to induction dynamo-electric machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2161528A GB320931A (en) | 1928-07-25 | 1928-07-25 | Improvements in or relating to induction dynamo-electric machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB320931A true GB320931A (en) | 1929-10-25 |
Family
ID=10165899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2161528A Expired GB320931A (en) | 1928-07-25 | 1928-07-25 | Improvements in or relating to induction dynamo-electric machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB320931A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2423081A1 (en) * | 1978-04-14 | 1979-11-09 | Fontanella Romano | PERFECTED ASYNCHRONOUS GENERATOR |
-
1928
- 1928-07-25 GB GB2161528A patent/GB320931A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2423081A1 (en) * | 1978-04-14 | 1979-11-09 | Fontanella Romano | PERFECTED ASYNCHRONOUS GENERATOR |
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