GB777326A - Improvements in or relating to electrical control circuits - Google Patents

Improvements in or relating to electrical control circuits

Info

Publication number
GB777326A
GB777326A GB556853A GB556853A GB777326A GB 777326 A GB777326 A GB 777326A GB 556853 A GB556853 A GB 556853A GB 556853 A GB556853 A GB 556853A GB 777326 A GB777326 A GB 777326A
Authority
GB
United Kingdom
Prior art keywords
windings
control
pair
reactors
current
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
GB556853A
Inventor
Thomas Philip Robinson
Bertram Walter Glover
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB556853A priority Critical patent/GB777326A/en
Publication of GB777326A publication Critical patent/GB777326A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G05B11/01—Automatic controllers electric
    • G05B11/012—Automatic controllers electric details of the transmission means
    • G05B11/016—Automatic controllers electric details of the transmission means using inductance means

Abstract

777,326. Inductance control systems for consumption apparatus. STANDARD TELEPHONES & CABLES, Ltd. Feb. 19, 1954 [Feb. 27, 1953], No. 5568/53. Class 38 (4). In a current control system comprising saturable reactors LSI-LS6 arranged in seriesconnected pairs in each live lead 1-3 with the D.C. control windings 8 of each pair connected in opposition to each other, each pair of reactors has a third pair of windings 9 connected in closed circuit in opposition through a resistance, such as a pair of reversely connected rectifiers MR1, variable inversely with current flow in the third windings. By this means elimination of even harmonic voltages from the D.C. windings is achieved without causing appreciable reduction in the speed of response of the reactors. To improve the response speed, without the necessity of excessive control power, the usual linear resistor in series with the control windings is replaced by a non-linear resistor, such as a rectifier MR6, the resistance of which rises sharply as the control 'current is reduced. The resistor may be shunted by a capacitor C which neutralizes part of the inductance of the control windings. The system shown, which is for use with an electrostatic precipitator, also includes shunt reactors LP1-LP6.
GB556853A 1953-02-27 1953-02-27 Improvements in or relating to electrical control circuits Expired GB777326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB556853A GB777326A (en) 1953-02-27 1953-02-27 Improvements in or relating to electrical control circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB556853A GB777326A (en) 1953-02-27 1953-02-27 Improvements in or relating to electrical control circuits

Publications (1)

Publication Number Publication Date
GB777326A true GB777326A (en) 1957-06-19

Family

ID=9798564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB556853A Expired GB777326A (en) 1953-02-27 1953-02-27 Improvements in or relating to electrical control circuits

Country Status (1)

Country Link
GB (1) GB777326A (en)

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