GB1303281A - - Google Patents
Info
- Publication number
- GB1303281A GB1303281A GB1959170A GB1959170A GB1303281A GB 1303281 A GB1303281 A GB 1303281A GB 1959170 A GB1959170 A GB 1959170A GB 1959170 A GB1959170 A GB 1959170A GB 1303281 A GB1303281 A GB 1303281A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thyristor
- capacitor
- half cycle
- transistor
- switched
- 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
Links
- 239000003990 capacitor Substances 0.000 abstract 6
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
-
- 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
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)
- Electronic Switches (AREA)
- Rectifiers (AREA)
- Direct Current Feeding And Distribution (AREA)
- Ac-Ac Conversion (AREA)
Abstract
1303281 Controlling A.C. supply to loads LICENTIA PATENT - VERWALTUNGSGmbH 23 April 1970 [24 April 1969] 19591/70 Heading H2H A circuit for controlling the supply of alternating current to a load 4 comprises reverse parallel connected thyristors 1, 2 which are switched on alternately at the zero passages of the alternating current by the discharge currents of respective control capacitors 51 and 61 respectively. A control circuit 3 switches on a transistor 7 to enable the capacitor 51 to be charged from the A.C. supply via a diode 53 and a resistor 52 during the first half cycle. Just before the zero passage of the A.C. supply, a transistor 57 is switched on to enable the capacitor 51 to discharge during the next half cycle via a diode 54 and the thyristor 1 thus switching on the thyristor 1. During this half cycle the capacitor 61 is charged from the voltage across the load via a diode 63 and a resistor 62. In the next half cycle the discharge of the capacitor 61 through the thyristor 2 and a resistor 66 switches on the thyristor 2, the thyristor 1 being prevented from conducting since the transistor 57 is switched off. The current supplied to the load may therefore be controlled by controlling the frequency at which the transistor 7 is switched on since each control pulse from the circuit 3 enables the capacitor 51 to charge so that the thyristors 1, 2 each conduct for one half cycle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691920916 DE1920916C (en) | 1969-04-24 | Device for controlling a static alternating current switch with two thyristors in counter-parallel connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1303281A true GB1303281A (en) | 1973-01-17 |
Family
ID=5732227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1959170A Expired GB1303281A (en) | 1969-04-24 | 1970-04-23 |
Country Status (7)
| Country | Link |
|---|---|
| AT (1) | AT300965B (en) |
| BE (1) | BE749411A (en) |
| CH (1) | CH505497A (en) |
| FR (1) | FR2046442A5 (en) |
| GB (1) | GB1303281A (en) |
| NL (1) | NL7005665A (en) |
| SE (1) | SE360794B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333048A (en) | 1979-10-20 | 1982-06-01 | Plessey Overseas Limited | Thyristor control circuits |
| GB2150771A (en) * | 1983-10-24 | 1985-07-03 | Marketmatch International | Heated airflow delivery apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE794897A (en) * | 1972-02-03 | 1973-05-29 | Calor Sa | PROCESS AND DEVICES FOR SUPPLYING A RESISTIVE LOAD WITH ALTERNATIVE CURRENT AT DIFFERENT VOLTAGES |
-
1970
- 1970-04-20 NL NL7005665A patent/NL7005665A/xx unknown
- 1970-04-21 SE SE548970A patent/SE360794B/xx unknown
- 1970-04-23 GB GB1959170A patent/GB1303281A/en not_active Expired
- 1970-04-23 BE BE749411D patent/BE749411A/en unknown
- 1970-04-23 CH CH606070A patent/CH505497A/en not_active IP Right Cessation
- 1970-04-23 FR FR7014895A patent/FR2046442A5/fr not_active Expired
- 1970-04-23 AT AT373470A patent/AT300965B/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4333048A (en) | 1979-10-20 | 1982-06-01 | Plessey Overseas Limited | Thyristor control circuits |
| GB2150771A (en) * | 1983-10-24 | 1985-07-03 | Marketmatch International | Heated airflow delivery apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1920916B2 (en) | 1971-04-01 |
| NL7005665A (en) | 1970-10-27 |
| DE1920916A1 (en) | 1971-01-14 |
| FR2046442A5 (en) | 1971-03-05 |
| AT300965B (en) | 1972-08-10 |
| SE360794B (en) | 1973-10-01 |
| CH505497A (en) | 1971-03-31 |
| BE749411A (en) | 1970-10-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |