GB550069A - Improvements in and relating to electric motor equipments for driving rolling mills - Google Patents
Improvements in and relating to electric motor equipments for driving rolling millsInfo
- Publication number
- GB550069A GB550069A GB377041A GB377041A GB550069A GB 550069 A GB550069 A GB 550069A GB 377041 A GB377041 A GB 377041A GB 377041 A GB377041 A GB 377041A GB 550069 A GB550069 A GB 550069A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- main motor
- booster
- voltage source
- generator
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Multiple Motors (AREA)
Abstract
550,069. Control of two or more D.C. motors. HILL, E. P., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. March 19, 1941, No. 3770. [Class 38 (iii)] Varying E.M.F ; field control. Where, as in a rolling mill, one or more auxiliary motors 7 are required to follow the speed variations of a main motor 1 which is controlled in part by field weakening, a booster 12 connected between a variable voltage source, such as a Ward Leonard generator 2, and the armatures of the auxiliary motors are excited in part by a tachometer generator 16 sharing the speed variations of the main motor and the generator 16 has an excitation component which varies with the field strength of the main motor. As shown the tachometer generator has opposed field windings 18, 19 which balance at full field strength of the main motor, one winding being in parallel with a time-constant reducing resistance 4 in the motor field circuit. As shown, the tachometer generator is in series with the booster field 14 (which also has a time-constant reducing resistance 15) and with the variable voltage source 2. The booster E.M.F. is opposed to that of the source 2 and the tachometer voltage developed in proportion to main motor speed and to the degree of field weakening is also opposed to the variable voltage source. Other arrangements are possible and the booster may assist the variable voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB377041A GB550069A (en) | 1941-03-19 | 1941-03-19 | Improvements in and relating to electric motor equipments for driving rolling mills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB377041A GB550069A (en) | 1941-03-19 | 1941-03-19 | Improvements in and relating to electric motor equipments for driving rolling mills |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB550069A true GB550069A (en) | 1942-12-22 |
Family
ID=9764594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB377041A Expired GB550069A (en) | 1941-03-19 | 1941-03-19 | Improvements in and relating to electric motor equipments for driving rolling mills |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB550069A (en) |
-
1941
- 1941-03-19 GB GB377041A patent/GB550069A/en not_active Expired
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