GB669854A - Improvements relating to control systems for dynamo electric machines - Google Patents
Improvements relating to control systems for dynamo electric machinesInfo
- Publication number
- GB669854A GB669854A GB1495949A GB1495949A GB669854A GB 669854 A GB669854 A GB 669854A GB 1495949 A GB1495949 A GB 1495949A GB 1495949 A GB1495949 A GB 1495949A GB 669854 A GB669854 A GB 669854A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- voltage
- generator
- developed
- flow
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C5/00—Gas-turbine plants characterised by the working fluid being generated by intermittent combustion
- F02C5/06—Gas-turbine plants characterised by the working fluid being generated by intermittent combustion the working fluid being generated in an internal-combustion gas generated of the positive-displacement type having essentially no mechanical power output
-
- 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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/34—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using Ward-Leonard arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
669,854. Control of D.C. motors. ENGLISH ELECTRIC CO.,.Ltd. May 26, 1950. [June 3, 1949] No. 14959/49. Class 38 (iii). [Also in Group XXXV] A system for regulating the armature current of the generator 1 of a Ward-Leonard set 1, 2 comprises a resistance 8 across which a voltage proportional to armature current is developed and a source of reference voltage developed across resistors 11 by means of a transformer 13 and rectifier 12 so that at load currents of the generator 'below a value at which the voltage drop across resistor 8 is less than the biasing voltage applied to each half of the centre tapped resistors 11, rectifiers 9, 10 prevent current flow in control windings. 6a, 7a of of magnetic amplifiers. 6, 7. If, however, the load current of the generator becomes such that the voltage exceeds the biasing voltage applied to each half of 11 the current will flow through rectifier 10 (assuming main current flow is direction A) and in the control windings of the magnetic amplifiers which become saturated. Owing to the reverse connections of the windings 6a, 7a current will only flow in the output of one of the magnetic amplifiers, e.g. 6, so that a voltage is developed across a resistor 15 and applied to a field winding 3b of an exciter 3 which reduces the excitation of the field 1a of the generator. If the current flow in the main circuit becomes excessive in the opposite direction due to regeneration by the motor 2, current flows through rectifier 9 and the output of the magnetic amplifier 7 is developed across a resistance 17 so that a voltage is applied to exciter winding 3b in a sense to cause increased excitation of the generator field 1a. Alternatively, two opposing field windings may be provided on the exciter 3 which are supplied differentially from the magnetic amplifiers. The voltage dependent on armature current may alternatively be derived from an impedance constituted by an interpole winding on the generator 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1495949A GB669854A (en) | 1949-06-03 | 1949-06-03 | Improvements relating to control systems for dynamo electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1495949A GB669854A (en) | 1949-06-03 | 1949-06-03 | Improvements relating to control systems for dynamo electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB669854A true GB669854A (en) | 1952-04-09 |
Family
ID=10050567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1495949A Expired GB669854A (en) | 1949-06-03 | 1949-06-03 | Improvements relating to control systems for dynamo electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB669854A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3049652A (en) * | 1958-06-18 | 1962-08-14 | White Motor Co | Ward-leonard control autotransformer circuit |
-
1949
- 1949-06-03 GB GB1495949A patent/GB669854A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3049652A (en) * | 1958-06-18 | 1962-08-14 | White Motor Co | Ward-leonard control autotransformer circuit |
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