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GB937717A - Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current - Google Patents

Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current

Info

Publication number
GB937717A
GB937717A GB2562661A GB2562661A GB937717A GB 937717 A GB937717 A GB 937717A GB 2562661 A GB2562661 A GB 2562661A GB 2562661 A GB2562661 A GB 2562661A GB 937717 A GB937717 A GB 937717A
Authority
GB
United Kingdom
Prior art keywords
frequency
machine
frequency changer
turbine
supplied
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
GB2562661A
Inventor
Owen Edgar Wright
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2562661A priority Critical patent/GB937717A/en
Publication of GB937717A publication Critical patent/GB937717A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2101/00—Special adaptation of control arrangements for generators
    • H02P2101/30—Special adaptation of control arrangements for generators for aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

937,717. Control of A.C. motors. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. May 29, 1962 [July 14, 1961], No. 25626/61. Class 38 (3). [Also in Group XXXV] A polyphase dynamo-electric machine 1 operates as a motor to start gas turbine 2, and as a generator driven by the turbine to supply current to a load network operating at constant frequency. When the machine 1 is motoring, power is drawn from network 7 through frequency changer 6 comprising semi-conductor converters. A three-phase reference voltage is supplied to the frequency changer from a local oscillator 8, and a control voltage through switch 9s. During the initial starting period, the machine 1 operates as an induction motor at low frequency and low voltage. When the machine has accelerated to a speed corresponding to the frequency of oscillator 8, the oscillator is disconnected and the reference voltage for the frequency changer is now taken from tachometer generator 3, such voltage being phase-advanced with respect to the E.M.F. generated in machine 1. The field of the machine 1 is now excited with direct-current through terminals 4, 5, and the machine acts as a synchronous motor for further acceleration. Thereafter, the turbine drives the machine as an alternator, the frequency of which is reduced by the frequency changer to the value required by the network 7. Direct-current excitation is supplied through terminals 4, 5. Control signals for the frequency changer are now supplied from generator output line 11. Reference signals whose frequency corresponds with that of the network 7 are supplied to the frequency changer from a local oscillator. When several units are individually coupled each to a turbine, the reference signals of supply frequency can be derived from a frequency changer associated with a turbine which has already run up.
GB2562661A 1961-07-14 1961-07-14 Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current Expired GB937717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2562661A GB937717A (en) 1961-07-14 1961-07-14 Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2562661A GB937717A (en) 1961-07-14 1961-07-14 Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current

Publications (1)

Publication Number Publication Date
GB937717A true GB937717A (en) 1963-09-25

Family

ID=10230707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2562661A Expired GB937717A (en) 1961-07-14 1961-07-14 Improvements in and relating to means for producing alternatively a variable driving torque and a constant frequency current

Country Status (1)

Country Link
GB (1) GB937717A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008098894A1 (en) * 2007-02-14 2008-08-21 Alstom Technology Ltd Power plant comprising a consumer and method for operating said power plant
US8373295B2 (en) 2007-02-14 2013-02-12 Alstom Technology Ltd Method for operating a power plant
US8796874B2 (en) 2007-02-14 2014-08-05 Alstom Technology Ltd Method for operating a power plant
US9605556B2 (en) 2007-02-14 2017-03-28 General Electric Company Power station and method for its operation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008098894A1 (en) * 2007-02-14 2008-08-21 Alstom Technology Ltd Power plant comprising a consumer and method for operating said power plant
US7944094B2 (en) 2007-02-14 2011-05-17 Alstom Technology Ltd. Power station having a consumer and method for its operation
US8373295B2 (en) 2007-02-14 2013-02-12 Alstom Technology Ltd Method for operating a power plant
US8796874B2 (en) 2007-02-14 2014-08-05 Alstom Technology Ltd Method for operating a power plant
US9605556B2 (en) 2007-02-14 2017-03-28 General Electric Company Power station and method for its operation

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