GB708075A - Improvements relating to automatic speed control systems for electric motors - Google Patents
Improvements relating to automatic speed control systems for electric motorsInfo
- Publication number
- GB708075A GB708075A GB1609051A GB1609051A GB708075A GB 708075 A GB708075 A GB 708075A GB 1609051 A GB1609051 A GB 1609051A GB 1609051 A GB1609051 A GB 1609051A GB 708075 A GB708075 A GB 708075A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speed
- strip
- generators
- slitter
- driven
- 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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
- B65H23/195—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations
- B65H23/198—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in winding mechanisms or in connection with winding operations motor-controlled (Controlling electrical drive motors therefor)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/41—Winding, unwinding
- B65H2301/414—Winding
- B65H2301/4148—Winding slitting
Landscapes
- Control Of Multiple Motors (AREA)
Abstract
708,075. Automatic speed control systems. ENGLISH ELECTRIC CO., Ltd. June 29, 1952 [July 6, 1951], No. 16090/51. Class 38(4) The invention relates to systems for automatically controlling the relative speed of two motors in accordance with the resultant output of two D.C. tachometer generators connected in series opposition and driven by the respective motors. To avoid the sudden change in the polarity of of the voltage drop across the brushes of the tachometer generators which takes place when the current in the output circuit changes direction, a biasing current is caused to flow through the tacho-generators to prevent a reversal of the net current over the range of speed variation. This invention is described with reference to a pull-through slitter for a strip rolling mill, wherein the edges of the strip 10 cut off by the slitter 11 are fed to a scrap-cutter 15, driven by a manually controlled Ward- Leonard set 16, 17 and the speed of the strip is controlled by varying the field of a Ward-Leonard generator 14 supplying the reel motor 13 to maintain the speed of the strip relative to scrap cutter 15. According to the invention tacho-generators 18, 19 driven by the cutter 15 and the slitter 11 respectively are connected in a bridge circuit with resistors 21, 22, and a D.C. biasing current obtained from the generator 17 is applied across one diagonal of the bridge, and the output signal is taken from the other diagonal to a control amplifier 20.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1609051A GB708075A (en) | 1951-06-06 | 1951-06-06 | Improvements relating to automatic speed control systems for electric motors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1609051A GB708075A (en) | 1951-06-06 | 1951-06-06 | Improvements relating to automatic speed control systems for electric motors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB708075A true GB708075A (en) | 1954-04-28 |
Family
ID=10071012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1609051A Expired GB708075A (en) | 1951-06-06 | 1951-06-06 | Improvements relating to automatic speed control systems for electric motors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB708075A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3489967A (en) * | 1966-07-05 | 1970-01-13 | Leipzig Veb Druckmasch Werke | Proportional action controller with derivative action part |
-
1951
- 1951-06-06 GB GB1609051A patent/GB708075A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3489967A (en) * | 1966-07-05 | 1970-01-13 | Leipzig Veb Druckmasch Werke | Proportional action controller with derivative action part |
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