GB676238A - Improvements relating to phase-control circuits - Google Patents

Improvements relating to phase-control circuits

Info

Publication number
GB676238A
GB676238A GB27397/49A GB2739749A GB676238A GB 676238 A GB676238 A GB 676238A GB 27397/49 A GB27397/49 A GB 27397/49A GB 2739749 A GB2739749 A GB 2739749A GB 676238 A GB676238 A GB 676238A
Authority
GB
United Kingdom
Prior art keywords
load
generator
frequency
supply
voltage
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
GB27397/49A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB676238A publication Critical patent/GB676238A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transmitters (AREA)

Abstract

676,238. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 25, 1949. [Oct. 29, 1948] No. 27397/49. Class 40 (i). [Also in Group XXXV] A load circuit is maintained at approximately unity power factor (i.e. the circuit in resonance with the supply frequency) by varying either the load reactance or the generator frequency in response to the output of a balanced phase discriminator fed from a current transformer in the load circuit and with the load voltage. The system may be used for example to maintain an antenna in tune with a variable frequency transmitter. As shown, generator 10 supplies load 20 through current transformer 12 to provide a voltage in quadrature with the current which combines vectorially with a supply voltage component developed across inductance 15 and is applied to two triodes 17, 18 biassed to cut off in the absence of a signal so as to operate in the manner of a conventional phase discriminator. An amplidyne generator 28 having its differential field 26, 27 energized by the output of the discriminator supplies a separately excited D.C. motor 31 to vary the inductance or capacitance of load 20 to maintain it at resonance. Alternatively, a potential-transformer across the load may supply the voltage component to the demodulator which controls a differental relay to control a servomotor varying the generator frequency, Fig. 3 (not shown).
GB27397/49A 1948-10-29 1949-10-25 Improvements relating to phase-control circuits Expired GB676238A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US676238XA 1948-10-29 1948-10-29

Publications (1)

Publication Number Publication Date
GB676238A true GB676238A (en) 1952-07-23

Family

ID=22077264

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27397/49A Expired GB676238A (en) 1948-10-29 1949-10-25 Improvements relating to phase-control circuits

Country Status (1)

Country Link
GB (1) GB676238A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506542A1 (en) * 1981-05-21 1982-11-26 Leybold Heraeus Gmbh & Co Kg METHOD FOR IMPLEMENTING A HIGH FREQUENCY GENERATOR TO SUPPLY A MASS SPECTROMETER AND GENERATOR WORKING ACCORDING TO THIS METHOD
DE3510114A1 (en) * 1984-03-21 1985-10-31 Plessey Overseas Ltd., Ilford, Essex ELECTRIC OSCILLATOR
WO2009154979A2 (en) * 2008-05-27 2009-12-23 Spacehab, Inc. Driving a mass spectrometer ion trap or mass filter
US8334506B2 (en) 2007-12-10 2012-12-18 1St Detect Corporation End cap voltage control of ion traps

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506542A1 (en) * 1981-05-21 1982-11-26 Leybold Heraeus Gmbh & Co Kg METHOD FOR IMPLEMENTING A HIGH FREQUENCY GENERATOR TO SUPPLY A MASS SPECTROMETER AND GENERATOR WORKING ACCORDING TO THIS METHOD
DE3120196A1 (en) * 1981-05-21 1982-12-16 Leybold-Heraeus GmbH, 5000 Köln METHOD FOR OPERATING A HIGH-FREQUENCY GENERATOR FOR THE SUPPLY OF A MASS SPECTROMETER AND HIGH-FREQUENCY GENERATOR WORKING ACCORDING TO THIS METHOD
US4506227A (en) * 1981-05-21 1985-03-19 Leybold Heraeus Gmbh Mass spectrometer
DE3510114A1 (en) * 1984-03-21 1985-10-31 Plessey Overseas Ltd., Ilford, Essex ELECTRIC OSCILLATOR
US8334506B2 (en) 2007-12-10 2012-12-18 1St Detect Corporation End cap voltage control of ion traps
US8704168B2 (en) 2007-12-10 2014-04-22 1St Detect Corporation End cap voltage control of ion traps
WO2009154979A2 (en) * 2008-05-27 2009-12-23 Spacehab, Inc. Driving a mass spectrometer ion trap or mass filter
WO2009154979A3 (en) * 2008-05-27 2010-02-25 Spacehab, Inc. Driving a mass spectrometer ion trap or mass filter
US7973277B2 (en) 2008-05-27 2011-07-05 1St Detect Corporation Driving a mass spectrometer ion trap or mass filter
CN102171783B (en) * 2008-05-27 2014-04-02 第一探测公司 Driving a mass spectrometer ion trap or mass filter

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