GB1415656A - Method and apparatus for supplying power to a load - Google Patents

Method and apparatus for supplying power to a load

Info

Publication number
GB1415656A
GB1415656A GB484272A GB484272A GB1415656A GB 1415656 A GB1415656 A GB 1415656A GB 484272 A GB484272 A GB 484272A GB 484272 A GB484272 A GB 484272A GB 1415656 A GB1415656 A GB 1415656A
Authority
GB
United Kingdom
Prior art keywords
load
triac
pulse
capacitor
half cycle
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
GB484272A
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.)
Roadside Technology Services Ltd
Original Assignee
GEC Elliott Automation 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 GEC Elliott Automation Ltd filed Critical GEC Elliott Automation Ltd
Priority to GB484272A priority Critical patent/GB1415656A/en
Priority to FR7303561A priority patent/FR2170138B3/fr
Priority to IT67208/73A priority patent/IT980944B/en
Priority to NL7301447A priority patent/NL7301447A/xx
Publication of GB1415656A publication Critical patent/GB1415656A/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
    • 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
    • H02P25/04—Single phase motors, e.g. capacitor motors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
    • 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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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
    • H02M5/27—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc 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 for conversion of 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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/292—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC
    • H02P7/293—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using static converters, e.g. AC to DC using phase control

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Ac Motors In General (AREA)
  • Power Conversion In General (AREA)

Abstract

1415656 Control systems for consuming apparatus; such as AC motors GEC-ELLIOTT AUTOMATION Ltd 2 Feb 1973 [2 Feb 1972] 4842/72 Headings H2H and H2J A system for supplying power to a load 1 from an A.C. source 2, 3 comprises a triac T1 which is controlled so as to provide at least two power pulses in each half cycle of the A.C. supply thereby suppressing certain of the harmonics which appear in the voltage applied to the load. A firing control circuit 4 produces a gating pulse which is applied to the gate of the triac T1 to render it conductive to produce of current pulse in the load 1 which may be a capacitor start split-phase induction motor. At the same . time a capacitor C1 charges by way of the triac T1 and a resistor R1. A further pulse from the circuit 4 renders a second triac T2 conductive whereupon the capacitor Cl commutates the triac T1 to its non-conductive state to end the current pulse in the load 1. The point X now rises to a voltage determined by a clamp circuit comprising a diode bridge and a capacitor C2 which enables the capacitor C1 to recharge to a polarity opposite to its original charge. Later in the half cycle a second pulse is applied to the gate of triac T1 to render it conductive and initiate a second current pulse in the load 1 and at the same time the capacitor C1 commutates triac T2 off. The second pulse in the load may terminate at the end of the half cycle of the A.C. supply or it may be terminated by forced commutation. As shown in Fig. 3, if the two load current pulses are of equal width and sym- metrically disposed in the half cycle the third harmonic associated with the pulses cancel. If more than two current pulses are formed in a half cycle other harmonics than the third are suppressed. The amplitude of the fundamental component of the load voltage may be varied by control of the pulse width.
GB484272A 1972-02-02 1972-02-02 Method and apparatus for supplying power to a load Expired GB1415656A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB484272A GB1415656A (en) 1972-02-02 1972-02-02 Method and apparatus for supplying power to a load
FR7303561A FR2170138B3 (en) 1972-02-02 1973-02-01
IT67208/73A IT980944B (en) 1972-02-02 1973-02-01 PROCEDURE AND APPARATUS FOR SUPPLYING POWER TO A LOAD FROM AN ALTERNATING ELECTRICAL CURRENT SOURCE
NL7301447A NL7301447A (en) 1972-02-02 1973-02-01

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB484272A GB1415656A (en) 1972-02-02 1972-02-02 Method and apparatus for supplying power to a load

Publications (1)

Publication Number Publication Date
GB1415656A true GB1415656A (en) 1975-11-26

Family

ID=9784824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB484272A Expired GB1415656A (en) 1972-02-02 1972-02-02 Method and apparatus for supplying power to a load

Country Status (4)

Country Link
FR (1) FR2170138B3 (en)
GB (1) GB1415656A (en)
IT (1) IT980944B (en)
NL (1) NL7301447A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2332108A (en) * 1997-12-05 1999-06-09 Samsung Kwang-Ju Electronics Co Ltd Motor phase control apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0113735B1 (en) * 1982-07-13 1986-10-29 Arid Electronic AG Method and device for controlling the rotation speed of a pump driving asynchronous motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2332108A (en) * 1997-12-05 1999-06-09 Samsung Kwang-Ju Electronics Co Ltd Motor phase control apparatus
GB2332108B (en) * 1997-12-05 2000-02-02 Kwangju Electronics Co Limited Motor phase control apparatus
ES2154996A1 (en) * 1997-12-05 2001-04-16 Samsung Kwangju Electronics Co Motor phase control apparatus

Also Published As

Publication number Publication date
NL7301447A (en) 1973-08-06
IT980944B (en) 1974-10-10
FR2170138A1 (en) 1973-09-14
FR2170138B3 (en) 1976-01-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee