[go: up one dir, main page]

GB708075A - Improvements relating to automatic speed control systems for electric motors - Google Patents

Improvements relating to automatic speed control systems for electric motors

Info

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
Application number
GB1609051A
Inventor
Walter Lewis Lifton Wynne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
English Electric Co Ltd
Original Assignee
English Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB1609051A priority Critical patent/GB708075A/en
Publication of GB708075A publication Critical patent/GB708075A/en
Expired legal-status Critical Current

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.
GB1609051A 1951-06-06 1951-06-06 Improvements relating to automatic speed control systems for electric motors Expired GB708075A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
GB1033227A (en) Tension regulating apparatus
US2485757A (en) Unwind reel control
GB708075A (en) Improvements relating to automatic speed control systems for electric motors
GB556773A (en) Improvements in and relating to speed control systems for electric motors
GB748544A (en) Improvements relating to apparatus for cutting materials by electric sparks
GB813130A (en) Improvements in and relating to control systems for electric motors driving rolling mills
GB1083152A (en) Apparatus for controlling a variable of moving elongate material
US2692360A (en) Motor speed matching control
US2411378A (en) Control system
GB738705A (en) Improvements relating to electric motor control systems
GB711104A (en) Improvements in or relating to control systems for electric motors
US1561267A (en) Speed-regulator system
GB660143A (en) Improvements in or relating to speed regulating systems
GB740816A (en) Improvements in electric motor control systems
GB778763A (en) Electrical system for reel motors in strip rolling mills and the like
GB710059A (en) Improvements in and relating to electric motor control systems
GB677247A (en) Improvements in or relating to direct current electric supply systems
GB474287A (en) Improvements in electric motor control systems
GB445557A (en) Improvements in and relating to electric motor control systems
GB737029A (en) Improvements relating to apparatus for cutting materials
GB655253A (en) Improvements in and relating to sectional machine drives
GB838781A (en) Improvements in electric motor control systems
GB679392A (en) Improvements in the control of dynamo electric machines
GB515103A (en) Improvements in or relating to electric drives and control systems for rolling mills
GB756980A (en) Improvements in or relating to protective systems for direct current motors