GB530122A - Improvements in and relating to control systems for dynamo electric machines - Google Patents
Improvements in and relating to control systems for dynamo electric machinesInfo
- Publication number
- GB530122A GB530122A GB17062/39A GB1706239A GB530122A GB 530122 A GB530122 A GB 530122A GB 17062/39 A GB17062/39 A GB 17062/39A GB 1706239 A GB1706239 A GB 1706239A GB 530122 A GB530122 A GB 530122A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- motor
- contacts
- june
- switch
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
Abstract
530,122. Control of A.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. June 10, 1939, No. 17062. Convention date, June 10, 1938. [Class 38 (iii)] A synchronous motor 1 is started as an induction motor and, as synchronous speed is approached, a relay 15, having current and voltage coils 18, 19, and an opposing voltage coil 21, is caused by the frequency, magnitude, and phase angle of the armature current pulsations to close its contacts 22 for a sufficient period to enable a time-delayed relay 25 to operate and de-energize a further time-delay relay 24, which energizes a switch 11 to connect the motor field to a source of excitation. The switch 11 retains itself over the contacts 32 of the relay 15, and short-circuits impedance 26, 30 in the circuit of the relay coil 19. Thus when the motor falls out of synchronism and the contacts 22 re-open, the starting connections are restored and the motor field re-excited when the speed again approaches synchronism. Reference is made to Specifications 464,866, 512,361 and 517,676.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US530122XA | 1938-06-10 | 1938-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB530122A true GB530122A (en) | 1940-12-05 |
Family
ID=21981349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17062/39A Expired GB530122A (en) | 1938-06-10 | 1939-06-10 | Improvements in and relating to control systems for dynamo electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB530122A (en) |
-
1939
- 1939-06-10 GB GB17062/39A patent/GB530122A/en not_active Expired
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