GB712252A - Improvements in and relating to means for reducing low frequency modulation in high frequency alternators - Google Patents

Improvements in and relating to means for reducing low frequency modulation in high frequency alternators

Info

Publication number
GB712252A
GB712252A GB2039651A GB2039651A GB712252A GB 712252 A GB712252 A GB 712252A GB 2039651 A GB2039651 A GB 2039651A GB 2039651 A GB2039651 A GB 2039651A GB 712252 A GB712252 A GB 712252A
Authority
GB
United Kingdom
Prior art keywords
high frequency
low frequency
alternator
voltage
amplifier
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
GB2039651A
Inventor
William Sebastian Graff-Baker
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 GB2039651A priority Critical patent/GB712252A/en
Publication of GB712252A publication Critical patent/GB712252A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/12—Neutralising, balancing, or compensation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

712,252. Automatic control systems. BRITISH THOMSON-HOUSTON CO., Ltd. June 26, 1952 [Aug. 29, 19511, No. 20396/51. Class 38(4) To reduce low frequency amplitude modulation of the output voltage of a high frequency inductor alternator A, e.g. due to mechanical eccentricity, a voltage at the low frequency is produced across a suitable reservoir condenser C, of a full wave rectifier supplied from the alternator and including gas-filled rectifier diodes V1, V2. The voltage so developed is applied to a two-valve amplifier V3, V4 the output of which is injected through a transformer T2 into the excitation circuit of the alternator in the appropriate sense to neutralize the modulation. Frequency-selective negative feed-back is applied to the amplifier by a network C5 R6 to reduce amplifier output impedance at the high frequency. A choke may replace transformer T2.
GB2039651A 1951-08-29 1951-08-29 Improvements in and relating to means for reducing low frequency modulation in high frequency alternators Expired GB712252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2039651A GB712252A (en) 1951-08-29 1951-08-29 Improvements in and relating to means for reducing low frequency modulation in high frequency alternators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2039651A GB712252A (en) 1951-08-29 1951-08-29 Improvements in and relating to means for reducing low frequency modulation in high frequency alternators

Publications (1)

Publication Number Publication Date
GB712252A true GB712252A (en) 1954-07-21

Family

ID=10145271

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2039651A Expired GB712252A (en) 1951-08-29 1951-08-29 Improvements in and relating to means for reducing low frequency modulation in high frequency alternators

Country Status (1)

Country Link
GB (1) GB712252A (en)

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