GB1527097A - Solid state switching circuits - Google Patents

Solid state switching circuits

Info

Publication number
GB1527097A
GB1527097A GB4866475A GB4866475A GB1527097A GB 1527097 A GB1527097 A GB 1527097A GB 4866475 A GB4866475 A GB 4866475A GB 4866475 A GB4866475 A GB 4866475A GB 1527097 A GB1527097 A GB 1527097A
Authority
GB
United Kingdom
Prior art keywords
supply
load
thyristors
current
input 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
GB4866475A
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics 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
Priority claimed from JP49138756A external-priority patent/JPS5162971A/ja
Priority claimed from JP50076018A external-priority patent/JPS51151100A/en
Priority claimed from JP12202875A external-priority patent/JPS5246462A/en
Priority claimed from JP12202975A external-priority patent/JPS5246463A/en
Application filed by Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Publication of GB1527097A publication Critical patent/GB1527097A/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
    • H03K17/13—Modifications for switching at zero crossing
    • H03K17/136—Modifications for switching at zero crossing in thyristor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/18—Modifications for indicating state of switch

Landscapes

  • Electronic Switches (AREA)
  • Power Conversion In General (AREA)

Abstract

1527097 Switching circuits for A.C. loads OMRON TATEISI ELECTRONICS CO 26 Nov 1975 [29 Nov 1974 20 June 1975 9 Oct 1975 (2)] 48664/75 Heading H2H A switching circuit comprises an input signal circuit IC arranged to produce a non-electrical signal from an input signal, a load circuit LC including terminals B1, B2 for connection to an A.C. supply and a load L, and a control circuit CC which is electrically isolated from the input circuit and responds to the non-electrical signal to cause current to flow from the supply through the load. When an input signal is applied to terminals A1, A2, a light emitting diode IND indicates receipt of the signal and a light emitting diode ED switches on a photo transistor PT. If at this instant the A.C. supply is above a zero threshold voltage, a transistor Tr is conductive to shunt the supply of gate current to thyristors SCR1, SCR2. When the A.C. voltage falls to the threshold value however, the transistor Tr is switched off so that gate current is supplied to the thyristors. The thyristors are conductive during respective half cycles of the A.C. supply to provide gate current to a triac TRC during each half cycle. Power is therefore supplied to the load L which may be a heater or a lamp such as a traffic light. The thyristors may have different gate sensitivities so that for intermediate levels of the input signal only one thyristor is conductive and the triac is only conductive during half cycles of one polarity. A variable resistor VR may therefore be adjusted to change the load current in three steps namely zero, half and full current.
GB4866475A 1974-11-29 1975-11-26 Solid state switching circuits Expired GB1527097A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP49138756A JPS5162971A (en) 1974-11-29 1974-11-29
JP50076018A JPS51151100A (en) 1975-06-20 1975-06-20 Indicative light control apparatus
JP12202875A JPS5246462A (en) 1975-10-09 1975-10-09 Power controlling device
JP12202975A JPS5246463A (en) 1975-10-09 1975-10-09 Power controlling device

Publications (1)

Publication Number Publication Date
GB1527097A true GB1527097A (en) 1978-10-04

Family

ID=27465895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4866475A Expired GB1527097A (en) 1974-11-29 1975-11-26 Solid state switching circuits

Country Status (3)

Country Link
DE (1) DE2553389B2 (en)
FR (1) FR2293108A1 (en)
GB (1) GB1527097A (en)

Cited By (1)

* 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4370564A (en) * 1980-06-04 1983-01-25 Ricoh Company, Ltd. AC Switching device
DE3743556A1 (en) * 1987-12-22 1989-07-13 Asea Brown Boveri CIRCUIT ARRANGEMENT FOR CONTROLLING A PERFORMANCE TRACE

Cited By (1)

* 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

Also Published As

Publication number Publication date
FR2293108A1 (en) 1976-06-25
DE2553389A1 (en) 1976-08-12
DE2553389B2 (en) 1978-05-03

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed