GB1253885A - Synchronized solid state relay - Google Patents

Synchronized solid state relay

Info

Publication number
GB1253885A
GB1253885A GB6218/69A GB621869A GB1253885A GB 1253885 A GB1253885 A GB 1253885A GB 6218/69 A GB6218/69 A GB 6218/69A GB 621869 A GB621869 A GB 621869A GB 1253885 A GB1253885 A GB 1253885A
Authority
GB
United Kingdom
Prior art keywords
thyristor
winding
supply
current
resistor
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
GB6218/69A
Inventor
Edward S Baker
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.)
Boeing Co
Original Assignee
Boeing Co
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 Boeing Co filed Critical Boeing Co
Priority to GB6218/69A priority Critical patent/GB1253885A/en
Priority to NL6906854A priority patent/NL6906854A/xx
Publication of GB1253885A publication Critical patent/GB1253885A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/722—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit
    • H03K17/723—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region with galvanic isolation between the control circuit and the output circuit using transformer coupling
    • 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
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/13—Modifications for switching at zero crossing
    • H03K17/136—Modifications for switching at zero crossing in thyristor switches

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 Electrical Variables (AREA)

Abstract

1,253,885. Switching circuits. BOEING CO. 5 Feb., 1969, No. 6218/69. Heading H2H. System for supplying a load with A.C. by way of an anti-parallel pair of thyristors includes a timing circuit designed to ensure switching at times when the line voltage is zero. As shown in Fig. 1, with a main switch 51 in the open position, current from the supply 10 flows to earth during each positive halfcycle through resistors 28, 40, 39, 42 and diodes 27, 38 so that gating signals are applied to a thyristor 31. Current now flows through this thyristor rather than through the parallel circuit containing a resistor 41, and so a further thyristor 29 is held in the non-conductive condition. Hence, there is no current flow in the primary winding 25 of transformer 18. When switch 51 is closed, current is diverted to ground by way of diode 50, so that the gating signals to thyristor 31 cease, and now the other thyristor 29 can conduct, so allowing current flow in the winding 25. The presence of the capacitor 26 and resistor 40 maintains the voltage at the supply end of the winding 25 appreciably advanced in phase compared with the supply, and as a result, a gating signal is supplied to main thyristor 14 through secondary winding 17 before the main power is of the correct polarity, but the signal is sufficient to ensure that the thyristor 14 conducts current to the load 11 as soon as the polarity across it changes. During the positive half-cycle, the phase advance of the voltage on winding 25 decreases because of the presence of resistor 28 in parallel with capacitor 26, so that current in the winding 25 is cut off just prior to polarity reversal of the supply. At this time, the transformer 18 generates a pulse in a further secondary winding 22 to gate on the other main thyristor 19 for the negative half-cycle of the supply. Instead of closing the switch 51, a D.C. signal may be supplied to the base of a transistor 63 to open a path to ground in a similar way. The system may be adapted for controlling a three-phase supply, Fig. 3 (not shown).
GB6218/69A 1969-02-05 1969-02-05 Synchronized solid state relay Expired GB1253885A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB6218/69A GB1253885A (en) 1969-02-05 1969-02-05 Synchronized solid state relay
NL6906854A NL6906854A (en) 1969-02-05 1969-05-05

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB6218/69A GB1253885A (en) 1969-02-05 1969-02-05 Synchronized solid state relay
NL6906854A NL6906854A (en) 1969-02-05 1969-05-05

Publications (1)

Publication Number Publication Date
GB1253885A true GB1253885A (en) 1971-11-17

Family

ID=26240528

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6218/69A Expired GB1253885A (en) 1969-02-05 1969-02-05 Synchronized solid state relay

Country Status (2)

Country Link
GB (1) GB1253885A (en)
NL (1) NL6906854A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126437A (en) * 1982-08-27 1984-03-21 Electronic Manufacturing Limit Semiconductor switching circuit
FR2636184A1 (en) * 1988-09-02 1990-03-09 Merlin Gerin STATIC CUT-OFF DEVICE FOR MEDIUM VOLTAGE ELECTRICAL CIRCUIT

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126437A (en) * 1982-08-27 1984-03-21 Electronic Manufacturing Limit Semiconductor switching circuit
FR2636184A1 (en) * 1988-09-02 1990-03-09 Merlin Gerin STATIC CUT-OFF DEVICE FOR MEDIUM VOLTAGE ELECTRICAL CIRCUIT
EP0359675A1 (en) * 1988-09-02 1990-03-21 Merlin Gerin Static breaker device for a middle-range voltage electrical circuit

Also Published As

Publication number Publication date
NL6906854A (en) 1970-11-09

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