GB1048682A - Electrical control systems - Google Patents

Electrical control systems

Info

Publication number
GB1048682A
GB1048682A GB4435362A GB4435362A GB1048682A GB 1048682 A GB1048682 A GB 1048682A GB 4435362 A GB4435362 A GB 4435362A GB 4435362 A GB4435362 A GB 4435362A GB 1048682 A GB1048682 A GB 1048682A
Authority
GB
United Kingdom
Prior art keywords
motor
rectifiers
phase
load
error signal
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
GB4435362A
Inventor
Dennis Andrew Craddock
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB4435362A priority Critical patent/GB1048682A/en
Publication of GB1048682A publication Critical patent/GB1048682A/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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/02—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude
    • H02P27/026—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using supply voltage with constant frequency and variable amplitude whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/022—Synchronous motors
    • H02P25/024—Synchronous motors controlled by supply frequency
    • 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency

Landscapes

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

Abstract

1,048,682. Automatic control of inductive loads. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 24, 1964 [Nov. 23, 1962], No. 44353/62. Heading G3R. [Also in Division H2] The current in or voltage across an inductive load is maintained in direct proportion to an input signal voltage by connecting the load in series with silicon controlled rectifiers across a D.C. source, the rectifiers being controlled sequentially by a pulse generator whose output is adjustable in mark-space ratio or frequency in accordance with the difference between the input signal and feedback signal from the load circuit. The inductive load may be consitututed by each phase winding of an induction motor regulated by signals whose frequency and phase relation are determined by the difference between an error signal and the slip frequency of the motor so that the motor torque is proportional to the error signal. In the case of a synchronous motor having two phase windings, the pulse generator is controlled, in addition to the feedback, by signals from a resolver driven by the motor through differential gearing which also receives a mechanical rotational error signal. The resolver outputs are thereby phase displaced relative to the motor flux and the energization of the motor windings is varied to produce a torque proportional to the error. When the inductive load is constituted by the field or armature of a D.C. motor or generator, the winding is split, the parts being inductively coupled together. Each part is in series with a separate rectifier, the two rectifiers being operated alternately.
GB4435362A 1962-11-23 1962-11-23 Electrical control systems Expired GB1048682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4435362A GB1048682A (en) 1962-11-23 1962-11-23 Electrical control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4435362A GB1048682A (en) 1962-11-23 1962-11-23 Electrical control systems

Publications (1)

Publication Number Publication Date
GB1048682A true GB1048682A (en) 1966-11-16

Family

ID=10432879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4435362A Expired GB1048682A (en) 1962-11-23 1962-11-23 Electrical control systems

Country Status (1)

Country Link
GB (1) GB1048682A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648150A (en) * 1970-02-26 1972-03-07 Westinghouse Electric Corp Apparatus for producing a low-distortion pulse width modulated inverter output
GB2150772A (en) * 1983-12-01 1985-07-03 Barry Wayne Williams Motor drive circuits
US4626979A (en) * 1985-02-22 1986-12-02 Diego Power Anticipatory feedback technique for pulse width modulated power supply

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648150A (en) * 1970-02-26 1972-03-07 Westinghouse Electric Corp Apparatus for producing a low-distortion pulse width modulated inverter output
GB2150772A (en) * 1983-12-01 1985-07-03 Barry Wayne Williams Motor drive circuits
US4626979A (en) * 1985-02-22 1986-12-02 Diego Power Anticipatory feedback technique for pulse width modulated power supply

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