GB1008401A - Improvements in and relating to electrical phase discriminators - Google Patents

Improvements in and relating to electrical phase discriminators

Info

Publication number
GB1008401A
GB1008401A GB3526560A GB3526560A GB1008401A GB 1008401 A GB1008401 A GB 1008401A GB 3526560 A GB3526560 A GB 3526560A GB 3526560 A GB3526560 A GB 3526560A GB 1008401 A GB1008401 A GB 1008401A
Authority
GB
United Kingdom
Prior art keywords
discriminator
proportional
output
amplitude
rectifier
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
GB3526560A
Inventor
John James Lawrance Weaver
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 GB3526560A priority Critical patent/GB1008401A/en
Publication of GB1008401A publication Critical patent/GB1008401A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
    • H03D13/007—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations
    • H03D13/009—Circuits for comparing the phase or frequency of two mutually-independent oscillations by analog multiplication of the oscillations or by performing a similar analog operation on the oscillations using diodes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/38—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Discharge Heating (AREA)

Abstract

1,008,401. Phase discriminators. ENGLISH ELECTRIC CO. Ltd. Oct. 11, 1961 [Oct. 14, 1960], No. 35265/60. Addition to 850,646. Heading H3A. In a phase discriminator as described in the parent Specification, in which the discriminator D.C. output is backed off by a D.C. bias across resistor 20 produced by rectifier 19, proportional to the amplitude of the weaker signal 12, it is arranged that above a particular value of the weaker input 12 in relation to the other input 11 a rectifier 50 conducts to introduce a backing off D.C. bias from a rectifier 52, proportional to the amplitude of the other input 11. By this means the backing off bias is made proportional in each case to the weaker signal amplitude and, the output also being proportional only to the weaker signal amplitude, the phase relation for which zero output is obtained from the discriminator is made independent of the amplitudes of both signal inputs. The discriminator may be applied to stabilizing the power factor of a high frequency electric furnace, its output varying the frequency of an oscillator controlling the frequency of a grid-controlled mercury arc inverter supplying the furnace (see the parent Specification (Group XXXV), or to operating protective electrical relays.
GB3526560A 1960-10-14 1960-10-14 Improvements in and relating to electrical phase discriminators Expired GB1008401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3526560A GB1008401A (en) 1960-10-14 1960-10-14 Improvements in and relating to electrical phase discriminators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3526560A GB1008401A (en) 1960-10-14 1960-10-14 Improvements in and relating to electrical phase discriminators

Publications (1)

Publication Number Publication Date
GB1008401A true GB1008401A (en) 1965-10-27

Family

ID=10375770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3526560A Expired GB1008401A (en) 1960-10-14 1960-10-14 Improvements in and relating to electrical phase discriminators

Country Status (1)

Country Link
GB (1) GB1008401A (en)

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