GB743887A - Improvements in and relating to control circuits for high frequency electronic oscillators - Google Patents

Improvements in and relating to control circuits for high frequency electronic oscillators

Info

Publication number
GB743887A
GB743887A GB2709753A GB2709753A GB743887A GB 743887 A GB743887 A GB 743887A GB 2709753 A GB2709753 A GB 2709753A GB 2709753 A GB2709753 A GB 2709753A GB 743887 A GB743887 A GB 743887A
Authority
GB
United Kingdom
Prior art keywords
oscillator
diode
bias
rectifiers
relating
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
GB2709753A
Inventor
William Cant
Oliver Francis Gullick
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
Priority to GB2709753A priority Critical patent/GB743887A/en
Publication of GB743887A publication Critical patent/GB743887A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/04—Sources of current

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

743,887. Automatic control systems for H.F. furnaces. BRITISH THOMSON-HOUSTON CO., Ltd. Sept. 23, 1954 [Oct. 2, 1953], No. 27097/53. Class 38 (4). In a high-frequency furnace in which the oscillator is supplied with high tension from grid controlled rectifiers, the bias on which is determined by the conductivity of a thermionic diode as in Specification 670,498, the diode filament is energized in accordance with the magnitude of the high tension current drawn by the oscillator so as to keep the output power substantially constant despite changes in output loading. The rectifiers V1, V2, V3 supplying the oscillator (not shown) have their grids connected to a star-connected secondary T1S of the main supply transformer (not shown), the star point having a D.C. bias tapped off potential divider VR1 via a cathode follower V4. The bias is varied by a diode V5 shunting the input ; and the heater of this diode is connected across a shunt, Fig. 1 (not shown), in the H.T. line between the rectifiers and the oscillator.
GB2709753A 1953-10-02 1953-10-02 Improvements in and relating to control circuits for high frequency electronic oscillators Expired GB743887A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2709753A GB743887A (en) 1953-10-02 1953-10-02 Improvements in and relating to control circuits for high frequency electronic oscillators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2709753A GB743887A (en) 1953-10-02 1953-10-02 Improvements in and relating to control circuits for high frequency electronic oscillators

Publications (1)

Publication Number Publication Date
GB743887A true GB743887A (en) 1956-01-25

Family

ID=10254145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2709753A Expired GB743887A (en) 1953-10-02 1953-10-02 Improvements in and relating to control circuits for high frequency electronic oscillators

Country Status (1)

Country Link
GB (1) GB743887A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522218A1 (en) * 1982-02-19 1983-08-26 Jakoubovitch A Transistor power oscillator for inductive heating - has capacitive divider or low impedance transformer, emitter resistors and excitation current control

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2522218A1 (en) * 1982-02-19 1983-08-26 Jakoubovitch A Transistor power oscillator for inductive heating - has capacitive divider or low impedance transformer, emitter resistors and excitation current control

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