GB684416A - Improvements in starting and synchronizing of electric machines - Google Patents
Improvements in starting and synchronizing of electric machinesInfo
- Publication number
- GB684416A GB684416A GB374750A GB374750A GB684416A GB 684416 A GB684416 A GB 684416A GB 374750 A GB374750 A GB 374750A GB 374750 A GB374750 A GB 374750A GB 684416 A GB684416 A GB 684416A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- synchronous
- slip
- speed
- starting
- 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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/46—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
684,416. Control of motors. BRITISH THOMSON-HOUSTON CO., Ltd., and OLDHAM, T. J. F. Feb. 13, 1951 [Feb. 14, 1950], No. 3747/50. Class 38 (iii) [Also in Group XXXV] A synchronous machine such as a synchronous condenser 5 is driven up to synchronism with the supply to which it is to be connected by an induction motor 1 the speed of which is rendered adjustable by the injection into its secondary windings of a voltage at an appriopriate low frequency. Fig. 1 shows the induction motor having a primary rotor winding supplied through slip-rings 2. The rotor also carries a regulating winding connected to commutator 3 from which polyphase voltages at slip frequency are derived for injection into the secondary windings on the stator of the motor. The amount of speed adjustment may be sufficient to cause the motor 1 to run at the synchronous speed of the machine 5 or above it. A handwheel may adjust the brushgear to set the slip to any desired small value. Control of the Scherbius type is shown in Fig. 2 in which a low frequency generator 7 is connected to the rotor secondary winding of the starting motor 9 through slip-rings 13, Adjustment of speed is obtained by means of excitation regulator 12 for the machine Y. In this case the starting motor has fewer poles than the synchronous condenser. The system may be used for starting synchronous type frequency charger sets for linking systems of unequal frequencies. The Provisional Specification refers to a starting motor of the Schrage type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB374750A GB684416A (en) | 1950-02-14 | 1950-02-14 | Improvements in starting and synchronizing of electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB374750A GB684416A (en) | 1950-02-14 | 1950-02-14 | Improvements in starting and synchronizing of electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB684416A true GB684416A (en) | 1952-12-17 |
Family
ID=9764208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB374750A Expired GB684416A (en) | 1950-02-14 | 1950-02-14 | Improvements in starting and synchronizing of electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB684416A (en) |
-
1950
- 1950-02-14 GB GB374750A patent/GB684416A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB684416A (en) | Improvements in starting and synchronizing of electric machines | |
| US2287603A (en) | Frequency changer set | |
| US1164223A (en) | Stabilized commutator-machine. | |
| US3991351A (en) | Brushless A.C. synchronous motors | |
| US3250974A (en) | System for controlling the speed or torque of one or more induction motors | |
| US2315490A (en) | Electric drive | |
| US3354369A (en) | System for controlling the speed or torque of one or more induction motors | |
| GB975102A (en) | Improvements relating to electric generating apparatus | |
| GB684415A (en) | Improvements concerned with the speed and voltage control of stator fed a.c. commutator motors and frequency converters | |
| US1645937A (en) | Transmission system | |
| US1590065A (en) | Speed-control system | |
| GB655865A (en) | Improvements in dynamo-electric machines | |
| GB678016A (en) | Improvements relating to electric supply systems | |
| US1670081A (en) | Induction-motor-control system | |
| US1756925A (en) | System of speed control for induction motors | |
| US1694321A (en) | Speed-control system | |
| GB191309261A (en) | Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working. | |
| GB400714A (en) | Improvements in and relating to universal induction regulators | |
| GB873026A (en) | Variable-frequency asynchronous generator system | |
| GB505609A (en) | Improvements in and relating to electric motor control | |
| GB645199A (en) | An improvement in or relating to commutator windings for commutator machines | |
| GB656719A (en) | Improvements relating to systems for controlling the excitation of polyphase machines | |
| GB720518A (en) | Improvements in or relating to rotary field generators | |
| GB273330A (en) | Improved means for exciting cascaded commutator machines with the supply circuit frequency | |
| GB700474A (en) | Improvements in speed control systems for multiphase statorfed a.c. commutator motors |