GB668165A - Improvements in and relating to automatic electric motor control systems - Google Patents
Improvements in and relating to automatic electric motor control systemsInfo
- Publication number
- GB668165A GB668165A GB9239/48A GB923948A GB668165A GB 668165 A GB668165 A GB 668165A GB 9239/48 A GB9239/48 A GB 9239/48A GB 923948 A GB923948 A GB 923948A GB 668165 A GB668165 A GB 668165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- motor
- generator
- armature
- mill
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
- B21B37/52—Tension control; Compression control by drive motor control
- B21B37/54—Tension control; Compression control by drive motor control including coiler drive control, e.g. reversing mills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Multiple Motors (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
668,165. Control of several D.C. motors. BRITISH THOMSON-HOUSTON CO., Ltd. April 1, 1948. [April 3, 1947] No. 9239/48. Class 38 (iii). [Also in Group XXXV] The tension in a steel strip passing from a rolling mill to a reel is maintained constant by varying the excitation of the reel motor to maintain the armature current constant and also by injecting into the field control circuit a voltage proportional to the acceleration of the mill motor. The armature of the reel motor 11 is supplied from a D.C. generator 12 through a resistor 17 so that a voltage proportional to armature current is applied to the control field 16a of an amplidyne 16, the output of which controls a second amplidyne 14 acting as a buck/boost generator in series with the supply to the field 11a of the reel motor. A second field winding 12b on the generator is also energized by amplidyne 14 to provide stalled tension when the motor is stationary. An auxiliary motor 18 has its field in parallel with the field of the mill motor 4 and drives generator 19 having its field in parallel with that of a generator 7 supplying the armature of the mill motor 4, hence any change in the field or armature currents of the mill motor produces a proportional change in the output of generator 19, across which is connected a transformer 21. A voltage proportional to the acceleration of the mill motor is therefore induced in the secondary of transformer 21, and this voltage by opposing the voltage across resistor 17 causes the reel motor to be correspondingly accelerated. In a modification, Fig. 2 (not shown), the auxiliary motor 18 has a constant field excitation, and the armature is in parallel with the mill motor armature, whilst the auxiliary generator 19 has its field connected across the mill motor field regulator 9. In another modification, Fig. 3 (not shown), the transformer 21 is omitted, and the control field of amplidyne 16 is connected to the auxiliary generator 19 through a condenser.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US668165XA | 1947-04-03 | 1947-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB668165A true GB668165A (en) | 1952-03-12 |
Family
ID=22071905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9239/48A Expired GB668165A (en) | 1947-04-03 | 1948-04-01 | Improvements in and relating to automatic electric motor control systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB668165A (en) |
-
1948
- 1948-04-01 GB GB9239/48A patent/GB668165A/en not_active Expired
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