GB865357A - Improvements in automatic load control systems for parallel connected alternators - Google Patents
Improvements in automatic load control systems for parallel connected alternatorsInfo
- Publication number
- GB865357A GB865357A GB22901/57A GB2290157A GB865357A GB 865357 A GB865357 A GB 865357A GB 22901/57 A GB22901/57 A GB 22901/57A GB 2290157 A GB2290157 A GB 2290157A GB 865357 A GB865357 A GB 865357A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speed
- alternator
- control
- alternators
- output
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
865,357. Automatic control systems for alternators. SUNDSTRAND CORPORATION. July 19, 1957 [July 25, 1956], No. 22901/57. Class 38 (4). In a system for parallel operation of alternators driven from aircraft engines through constant-speed drive units, the drive units are further controlled in accordance with alternator frequency and loading. Each alternator, e.g. 10, is driven by an aircraft engine through a drive unit 11 which maintains the speed constant as disclosed in Specification 735,194 and is also responsive as disclosed in Specification 813,279 to the output of a magnetic amplifier 25 to adjust the speed both for fine-frequency control and for load sharing. Load sharing.-A current transformer 21 measures the load current in one phase, and with the corresponding transformers of the other alternators is connected in a series loop, Fig. 3 (not shown). There is a contactor 20 linked with each main circuit-breaker to short out the current transformer of an idle alternator. The voltage appearing across the current transformer 21 is the vector difference between the current in that coil and the vector average of the currents in all of the other coils, and this voltage is applied across a resistor 30 in a phase comparator 24 the output of which is the " in phase " component of the current signal. This output is differentiated at 36, 37 and applied to one control winding of the magnetic amplifier 25, and integrated at 38, 39, 40 and applied to a second control winding of the magnetic amplifier 25 to control the driver unit 11. Speed control.-A third control winding on the magnetic amplifier 25 is energized from a bridge circuit consisting of fixed arms 73, 74 and a potential divider 65. The slider of the potential divider 65 is adjusted by the output shaft of a differential gear, Fig. 7 (not shown), the inputs of which are driven by two synchronous motors, Fig. 6 (not shown). One motor is energized from the alternator 10 and the other is energized via a power amplifier from a standard frequency tuning fork. The amplifier 25 adjusts the drive unit 11 to correct the speed. Specification 865,358 also is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US865357XA | 1956-07-25 | 1956-07-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB865357A true GB865357A (en) | 1961-04-12 |
Family
ID=22199227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22901/57A Expired GB865357A (en) | 1956-07-25 | 1957-07-19 | Improvements in automatic load control systems for parallel connected alternators |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB865357A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3267345A (en) * | 1963-07-02 | 1966-08-16 | Allis Chalmers Mfg Co | Plural motor control for a locomotive with anti-slip and load distribution |
-
1957
- 1957-07-19 GB GB22901/57A patent/GB865357A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3267345A (en) * | 1963-07-02 | 1966-08-16 | Allis Chalmers Mfg Co | Plural motor control for a locomotive with anti-slip and load distribution |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3090901A (en) | Motor speed control systems | |
GB865357A (en) | Improvements in automatic load control systems for parallel connected alternators | |
US2689327A (en) | Dynamoelectric machine | |
US2637014A (en) | Speed control | |
US2607028A (en) | Voltage and frequency regulator | |
GB1150982A (en) | Improvements in or relating to Power Regulating Systems of Engine Driven Generators | |
US2507936A (en) | Power control device | |
US2707260A (en) | Electrical control systems for an induction motor | |
US2448925A (en) | Motor system using voltage regulating transformer | |
SU868965A1 (en) | Self-sustained power supply system | |
GB1080465A (en) | Electrical responsive controls | |
US3078374A (en) | Generator control system | |
US2578385A (en) | Voltage regulator | |
GB907086A (en) | Automatic voltage control apparatus for dynamoelectric generators | |
US1900707A (en) | Regulation of alternating current circuits | |
US2639413A (en) | Frequency regulator | |
US2972098A (en) | Voltage regulating system | |
GB718023A (en) | Improvements in or relating to control apparatus for synchronous electric machines | |
GB797444A (en) | Regulating system for a motor generator system | |
Johnson et al. | A magnetic amplifier frequency control | |
GB678424A (en) | Improvements in or relating to frequency regulating systems for motor driven alternating current generators | |
GB815546A (en) | Improvements relating to automatic load-sharing apparatus for alternating-current generators | |
GB729512A (en) | Improvements in or relating to an electrical generating system | |
GB728425A (en) | Improvements in and relating to automatic speed control systems | |
GB869613A (en) | Improvements in and relating to a.c. motor control systems |