GB774423A - Improvements in or relating to direct current electric supply systems - Google Patents
Improvements in or relating to direct current electric supply systemsInfo
- Publication number
- GB774423A GB774423A GB29256/54A GB2925654A GB774423A GB 774423 A GB774423 A GB 774423A GB 29256/54 A GB29256/54 A GB 29256/54A GB 2925654 A GB2925654 A GB 2925654A GB 774423 A GB774423 A GB 774423A
- Authority
- GB
- United Kingdom
- Prior art keywords
- generator
- current
- exciter
- winding
- motor
- 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
- 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
- H02P7/347—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 in which only the generator field is controlled
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
774,423. Exciting dynamo-electric machines. GENERAL ELECTRIC CO., Ltd. Oct. 11, 1955 [Oct. 11, 1954], No. 29256/54. Addition to 677,247. Class 35. [Also in Group XXXVII] A D.C. supply system comprises a main generator 10 having the field winding 12 fed from an exciter 13 whose excitation current is arranged to depend upon the main generator output power and current and upon a reference electrical quantity. The exciter 13 has a first field winding (not shown) which is supplied with direct current at variable value for the speed control of the motor 11, and a second winding 1 energized through a metal rectifier 2 in dependence upon the power and current output of the generator 10. The rectifier 2 is such that no current passes until a predetermined voltage is reached when a current flows in the winding 1 tending to reduce the excitation of the generator 10 and therefore limiting the output current. In order to energize the winding 1 in dependence upon the power output of the generator 10, an exciter 3 is provided and driven by the motor 11 and, therefore, runs at a speed proportional to the voltage of the generator 10. The field winding 15 of the exciter 3 is supplied from across the generator interpole 14 and therefore in proportion to the generator current; hence output power of the exciter 3 is proportional to the output power of the generator 10. Rectifiers 4, 5 are arranged to enable the current and power supplies to the winding 1, while rectifiers 6, 7, 8 deal with regenerative conditions when current in the generator 10 and motor 11 circuit reverses. If the motor 11. is required to run at various speeds by control of its field, then a separate motor supplied from the generator 10 is arranged to drive the exciter 3. Instead of using a single winding 1 of the exciter 13 to provide both for current and power limit control of the generator 10, two separate field windings may be provided on this exciter in addition to the winding whose current depends upon the reference electrical quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29256/54A GB774423A (en) | 1954-10-11 | 1954-10-11 | Improvements in or relating to direct current electric supply systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29256/54A GB774423A (en) | 1954-10-11 | 1954-10-11 | Improvements in or relating to direct current electric supply systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB774423A true GB774423A (en) | 1957-05-08 |
Family
ID=10288621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29256/54A Expired GB774423A (en) | 1954-10-11 | 1954-10-11 | Improvements in or relating to direct current electric supply systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB774423A (en) |
-
1954
- 1954-10-11 GB GB29256/54A patent/GB774423A/en not_active Expired
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