GB1227970A - - Google Patents
Info
- Publication number
- GB1227970A GB1227970A GB1227970DA GB1227970A GB 1227970 A GB1227970 A GB 1227970A GB 1227970D A GB1227970D A GB 1227970DA GB 1227970 A GB1227970 A GB 1227970A
- Authority
- GB
- United Kingdom
- Prior art keywords
- triac
- supply
- voltage
- potentiometer
- thyristor
- 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
Classifications
-
- 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
- H02M1/081—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters wherein the phase of the control voltage is adjustable with reference to the AC source
-
- 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
-
- 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
- G05F1/455—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 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)
Abstract
1,227,970. Triggering thyristors. HOLZER PATENT A.G. 21 Aug., 1968 [21 Aug., 1967], No. 40022/68. Heading H2F. [Also in Division G3] In a regulating circuit including an electronic switching device, such as a triac 31, means is provided to trigger the device at the zero points of the A.C. supply. A motor 32 supplied through the triac 31 drives an A.C. tachogenerator 20 whose output is rectified, smoothed and applied to a potentiometer 23 whose setting represents the desired motor speed. The portion tapped off by the potentiometer 23 is amplified by a two stage transistor amplifier 24, 29 and applied to the trigger electrode of the triac 31 so that it is switched on whenever the motor speed is below the set value and switched off when it rises above. Across the triac is a potential divider 35, 36 supplying a synchronizing voltage on line a. This is applied through diodes 37, 38 to the input and output of transistor 24 which is a phase inverting amplifier. There thus appears at the base of transistor 29 a full wave rectified version of the A.C. synchronizing voltage superimposed upon a D.C. level established by the speed voltage on potentiometer 23. The signal b at the trigger electrode is thus a fluctuating D.C. with peaks corresponding to the zero points of the supply and the triac is therefore fired only at the zero points. The triac may be replaced by a unidirectional thyristor (Fig. 3, not shown). The synchronizing voltage may be derived direct from the A.C. supply rather than across the thyristor 31 but the arrangement shown is preferable particularly where the voltage across the thyristor is out of phase with the supply.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19671588295 DE1588295B2 (en) | 1967-08-21 | 1967-08-21 | Circuit arrangement for the synchronization of ignition signals for a controllable semiconductor switch with de zero crossings of a synchronization alternating voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1227970A true GB1227970A (en) | 1971-04-15 |
Family
ID=5679888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1227970D Expired GB1227970A (en) | 1967-08-21 | 1968-08-21 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1582691A (en) |
| GB (1) | GB1227970A (en) |
-
1968
- 1968-08-19 FR FR1582691D patent/FR1582691A/fr not_active Expired
- 1968-08-21 GB GB1227970D patent/GB1227970A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1582691A (en) | 1969-10-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |