GB1235683A - A.c. power control - Google Patents

A.c. power control

Info

Publication number
GB1235683A
GB1235683A GB6224/68A GB622468A GB1235683A GB 1235683 A GB1235683 A GB 1235683A GB 6224/68 A GB6224/68 A GB 6224/68A GB 622468 A GB622468 A GB 622468A GB 1235683 A GB1235683 A GB 1235683A
Authority
GB
United Kingdom
Prior art keywords
pulses
pulse
load
supply
pulse trains
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
GB6224/68A
Inventor
Leonard Richard Tyley
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.)
Diamond H Controls Ltd
Original Assignee
Diamond H Controls 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 Diamond H Controls Ltd filed Critical Diamond H Controls Ltd
Publication of GB1235683A publication Critical patent/GB1235683A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05F1/452—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 with pulse-burst modulation control
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/083—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the ignition at the zero crossing of the voltage or the current
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/15—Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors
    • H03K5/15013—Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors with more than two outputs
    • H03K5/15026—Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors with more than two outputs with asynchronously driven series connected output stages
    • H03K5/15033—Arrangements in which pulses are delivered at different times at several outputs, i.e. pulse distributors with more than two outputs with asynchronously driven series connected output stages using a chain of bistable devices
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1536—Zero-crossing detectors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electronic Switches (AREA)

Abstract

1,235,683. Selective control systems. DIAMOND H. CONTROLS Ltd. 21 Nov., 1968 [7 Nov., 1967; 8 Feb., 1968], Nos. 50571/67 and 6224/68. Heading G4H. [Also in Division H2] A control system wherein the power supplied to a load is determined by the number of pulses in a pulse train comprises means for generating a stream of regular pulses which are independent of the load power requirement, digital means for providing from the pulse stream a number of separate pulse trains and contactless selector means for selecting and combining the separate pulse trains in combinations which control the power supply to the load. The load may be a cooking apparatus such as an oven and the selector means may be manually operated or automatically operated by a sensor which may be a bi-metallic strip, a pressure-sensitive bellows. Alternatively a motor-driven programming device may be used as a selector means. The power supply to the oven may be controlled by way of a thyristor or a triac the triggering signals for which are provided by the pulses in the combined pulse train, each pulse triggering the thyristor into conduction for one half cycle of the A.C. supply. The regular stream of pulses is generated from an A.C. supply by means of a rectifier, zener diode clipper arrangement together with an inverter-amplifier device, the pulses occurring at the supply frequency at null points in the supply. These pulses are supplied to a plurality of flip-flop devices and AND-gates whereby separate pulse trains are produced each of which has a waveform which is twice as long as that of the preceding train. The separate pulse trains are fed to a contactless selecting device whereby the pulse trains can be selected and combined to produce a pulse train which is used to control the power supply to the load. The selector device may comprise variable transformers, variable capacitors, variable inductors or light-sensitive elements. Furthermore the output pulse train may be arranged to have one interval which does not contain a pulse and this interval may be used for detecting abnormal conditions in the system. An alternative embodiment shows the separate pulse trains derived from clock pulses using shift registers and a flip-flop device.
GB6224/68A 1967-11-07 1967-11-07 A.c. power control Expired GB1235683A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5057167 1967-11-07

Publications (1)

Publication Number Publication Date
GB1235683A true GB1235683A (en) 1971-06-16

Family

ID=10456418

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6224/68A Expired GB1235683A (en) 1967-11-07 1967-11-07 A.c. power control

Country Status (1)

Country Link
GB (1) GB1235683A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003453A1 (en) * 1979-02-01 1980-08-14 Gen Electric CIRCUIT ARRANGEMENT FOR CONTROLLING THE OUTPUT PERFORMANCE OF A RESISTANCE HEATING ELEMENT
GB2150771A (en) * 1983-10-24 1985-07-03 Marketmatch International Heated airflow delivery apparatus
DE3437242A1 (en) * 1984-10-11 1986-04-17 Alfred 5628 Heiligenhaus Eckerfeld Electronic power controller, especially for controlling the outlet temperature of electrical continuous-flow heaters
GB2173062A (en) * 1985-03-29 1986-10-01 Ferranti Plc Magnetron heater power supply
FR2641435A1 (en) * 1988-12-30 1990-07-06 Labo Electronique Physique Power control device and heating appliance equipped with this device
GB2312570A (en) * 1996-04-26 1997-10-29 Ceramaspeed Ltd Power control for a radiant electric heater
GB2329769A (en) * 1997-09-24 1999-03-31 Ceramaspeed Ltd Electric heater control

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3003453A1 (en) * 1979-02-01 1980-08-14 Gen Electric CIRCUIT ARRANGEMENT FOR CONTROLLING THE OUTPUT PERFORMANCE OF A RESISTANCE HEATING ELEMENT
GB2150771A (en) * 1983-10-24 1985-07-03 Marketmatch International Heated airflow delivery apparatus
DE3437242A1 (en) * 1984-10-11 1986-04-17 Alfred 5628 Heiligenhaus Eckerfeld Electronic power controller, especially for controlling the outlet temperature of electrical continuous-flow heaters
GB2173062A (en) * 1985-03-29 1986-10-01 Ferranti Plc Magnetron heater power supply
FR2641435A1 (en) * 1988-12-30 1990-07-06 Labo Electronique Physique Power control device and heating appliance equipped with this device
GB2312570A (en) * 1996-04-26 1997-10-29 Ceramaspeed Ltd Power control for a radiant electric heater
US5908571A (en) * 1996-04-26 1999-06-01 Ceramaspeed Limited Radiant electric heater arrangement
GB2312570B (en) * 1996-04-26 2000-04-19 Ceramaspeed Ltd Radiant electric heater arrangement
GB2329769A (en) * 1997-09-24 1999-03-31 Ceramaspeed Ltd Electric heater control
US6118106A (en) * 1997-09-24 2000-09-12 Ceramaspeed Limited Apparatus for controlling an electric heater energized from a single voltage alternating current supply

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