GB434903A - Improvements in synchronous electric drives - Google Patents
Improvements in synchronous electric drivesInfo
- Publication number
- GB434903A GB434903A GB22670/34A GB2267034A GB434903A GB 434903 A GB434903 A GB 434903A GB 22670/34 A GB22670/34 A GB 22670/34A GB 2267034 A GB2267034 A GB 2267034A GB 434903 A GB434903 A GB 434903A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motors
- synchronizing
- speed
- machines
- drive
- 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
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
434,903. Maintaining equal speeds of motors. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET, Võsteras, Sweden. Aug. 3, 1934, No. 22670. Convention date, Feb. 8. [Class 38 (iii)] The driving unit of each of a number of machines, e.g. the printing units and folders of a printing press, comprises a three - phase commutator motor 1 speed regulated by brush displacement, mechanically coupled directly or by gearing to an asynchronous motor 2, one of the motors serving for the drive and the other for synchronizing at normal speed, and the functions being interchanged at crawling speed, the synchronizing motors being connected in parallel on their stator and rotor sides. At starting a switch 11 may be closed and the asynchronous motors 2 may be fed from a low-frequency supply to drive the machines at crawling speed, the commutator motors with their stator windings disconnected from the brushes acting as synchronizing machines. For normal running the motors 2 are connected to the supply of normal frequency and act as synchronizing machines, while the motors 1 serve for the drive. Alternatively, the motors 1 may serve as the drive at crawling speed, being fed from a low frequency supply and having their secondary windings disconnected from the brushes and short-circuited. In this case the motors 2 ensure synchronism at crawling speed, and act as the drive with the motors 1 maintaining synchronism at normal speed. The brushes of the motors 1 are displaced by motors 17 under the control of push-button switches 13, 14, and directional current relays 18, in the stator or rotor circuits of the motors 2, also control the motors 17 to prevent the motors 2 being loaded while they serve for synchronizing. The brushes of the motors 1 may be returned to the low speed position when the motors are stopped. The correct relationship of the machines is ensured by synchronizing relays 22 controlling contactors 21 in the stator circuits of the motors 1 as described in Specification 434,947.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE434903X | 1934-02-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB434903A true GB434903A (en) | 1935-09-11 |
Family
ID=20309892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB22670/34A Expired GB434903A (en) | 1934-02-08 | 1934-08-03 | Improvements in synchronous electric drives |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB434903A (en) |
-
1934
- 1934-08-03 GB GB22670/34A patent/GB434903A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| PL210046A1 (en) | ELECTRIC TWO-ENGINE DRIVE | |
| GB434903A (en) | Improvements in synchronous electric drives | |
| US1872371A (en) | Alternating current motor | |
| US1894805A (en) | Single phase motor | |
| US2287603A (en) | Frequency changer set | |
| GB491469A (en) | Improvements in and relating to alternating current motors | |
| US960884A (en) | Alternate-current commutator-motor. | |
| GB196586A (en) | Improvements in or relating to synchronized asynchronous machines | |
| GB385986A (en) | Improvements in and relating to dynamo electric machines | |
| US2677083A (en) | Motor control circuit with a frequency converter | |
| US1336566A (en) | Speed-control system for induction-motors | |
| GB398325A (en) | Improvements relating to brush-shifting gear for dynamo-electric machines | |
| US2692362A (en) | Control circuits for induction motors | |
| GB476174A (en) | Improvements in and relating to systems of electric motor control | |
| GB464314A (en) | A synchronised electric device for the units of sectional printing presses | |
| GB500955A (en) | Improvements in or relating to electrical driving means | |
| GB366251A (en) | Improvements in and relating to electric motor control | |
| GB420287A (en) | Improvements in and relating to electric converting systems | |
| GB393347A (en) | Improvements in and relating to methods of controlling the speed of electric motors | |
| GB217602A (en) | Improvements in and relating to systems of electric ship propulsion | |
| GB604694A (en) | Improvements relating to dynamoelectric machines | |
| GB151810A (en) | Improvements in means for starting up synchronous rotary converters and other electrical machines of a like character | |
| GB869243A (en) | Improvements in and relating to synchronous dynamo-electric machines particularly for prime mover starting | |
| GB456890A (en) | Improvements in and relating to speed changing arrangements for three-phase shunt wound electric motors | |
| GB528878A (en) | Improvements in and relating to electric motors |