DE891416C - Arrangement for feeding a direct current arc via a controllable rectifier - Google Patents
Arrangement for feeding a direct current arc via a controllable rectifierInfo
- Publication number
- DE891416C DE891416C DES4742D DES0004742D DE891416C DE 891416 C DE891416 C DE 891416C DE S4742 D DES4742 D DE S4742D DE S0004742 D DES0004742 D DE S0004742D DE 891416 C DE891416 C DE 891416C
- Authority
- DE
- Germany
- Prior art keywords
- arc
- rectifier
- arrangement
- direct current
- feeding
- 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 claims description 4
- 238000009499 grossing Methods 0.000 claims description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/15—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Description
Es sind Gleichrichteranlagen bekanntgeworden, bei denen Lichtbögen aus einem Wechselstromnetz über einen Gleichrichter gespeist werden. Der Gleichrichter wird in Abhängigkeit von bestimmten Kenngrößen des zu speisenden Lichtbogens derart gesteuert, daß die Kennlinien für Strom und Spannung den betriebstechnischen Anforderungen des Lichtbogens möglichst weitgehend angepaßt sind. Der Gxleichrichter ist mit selbsttätigen Regeleinrichtungen ausgerüstet, damit die von ihm abgegebene Spannung bzw. der den Lichtbogen speisendeStrom geändert- werden kann, wenn sich während des Betriebes die Betriebsgrößen des Lichtbogens ändern. Gittergesteuerte Quecksilberdampfgleichrichter oder Quecksilberdampfgleichrichter mit gleichwertigen Steuerungsmitteln, beispielsweise in die Kathode eintauchenden Zündelektroden, sind für diese Regelung besonders geeignet, weil sie die Möglichkeit bieten, den verhältnismäßig schnell verlaufenden Änderungen der Betriebsgrößen des Lichtbogens zu folgen.Rectifier systems have become known in which arcs fed from an alternating current network via a rectifier. The rectifier becomes like this depending on certain parameters of the arc to be fed controlled that the characteristic curves for current and voltage meet the operational requirements of the arc are adapted as much as possible. The rectifier is with automatic Equipped control devices so that the voltage delivered by him or the Arc-feeding current - can be changed if during operation change the operating parameters of the arc. Grid controlled mercury vapor rectifiers or mercury vapor rectifiers with equivalent control means, for example Ignition electrodes immersed in the cathode are particularly suitable for this control because they offer the possibility of changes that take place relatively quickly to follow the operating parameters of the arc.
Bei dem Betrieb solcher Gleichrichteranlagen in Verbindung mit Lichtbögen höherer Spannung hat sich gezeigt, daß der Betrieb dadurch mehr oder weniger stark gestört wird, daß im Lichtbogen auftretende Schwingungen in Verbindung mit den der Gleichspannung überlagerten Oberwellen dazu füh- ren, daß ein stabiler Betrieb des Lichtbogens mehr oder weniger stark gestört, wenn nicht sogar ganz unmöglich gemacht wird. Man hat versucht, in der von der Gleichrichtertechnik her üblichen Weise zwischen den Gleichrichter und den Lichtbogen Hilfskreise zu schalten, die aus Induktivitäten und Kapazitäten bestehen und dafür sorgen sollen, daß etwa in der Gleichspannung des Gleichrichters enthaltene Oberwellen an dem zu speisenden Lichtbogen nicht mehr in Erscheinung treten. Diese Hilfsmittel haben jedoch nicht den gewünschten Erfolg gehabt.In the operation of such electric power plants in conjunction with arcs higher voltage, it has been found that the operation is greatly disturbed more or less that occurring in the arc vibrations in connection with the DC voltage superimposed harmonics to ren leadership that a stable operation of the arc is more or less disturbed, if not even made completely impossible. Attempts have been made to switch auxiliary circuits between the rectifier and the arc between the rectifier and the arc in the manner customary in rectifier technology, which are made up of inductances and capacitances and are intended to ensure that harmonics contained in the DC voltage of the rectifier are no longer in the arc to be fed Appearance. However, these tools have not had the desired effect.
Gemäß der Erfindung werden die Betriebsschwierigkeiten dadurch beseitigt, daß zu dem zu speisenden Lichtbogen die Reihenschaltung, aus einem Kondensator und einem Ohmschen Widerstand parallel geschaltet wird. Außerdem. wird zweckmäßig zwischen den Gleichrichter und den zu speisenden Lichtbogen, und zwar vor dem Anschlußpunkt des aus Kondensator und Widerstand bestehenden Parallelkreises, eine Reihenschaltung aus einer Glättungsdrosselspule üblicher Bauart und einer Luftdrosselspule geschaltet. Die Luftdrosselspule ist dabei so zu bauen, daß ihre Induktivität auch im Bereich höherer Frequenzen noch wirksam ist.According to the invention, the operational difficulties are eliminated by that to the arc to be fed the series circuit, from a capacitor and connected in parallel with an ohmic resistor. Aside from that. is expedient between the rectifier and the arc to be fed, in front of the connection point of the parallel circuit consisting of capacitor and resistor, a series connection switched from a smoothing choke coil of conventional design and an air choke coil. The air choke coil is to be built so that its inductance is also in the range higher frequencies is still effective.
In der Zeichnung ist ein Ausführungsbeispiel der Erfindung im Schaltungsschema dargestellt.In the drawing, an embodiment of the invention is in the circuit diagram shown.
Der zu speisende Lichtbogen ist mit i bezeichnet. Zu seinen Klemmen ist die Reihenschaltung aus einem Kondensator 2 und einem Ohmschen Widerstand 3 parallel geschaltet. Dem die Gleichspannung liefernden Gleichrichter 4 ist eine Glättungsdrosselspule 5 üblicher Bauart und eine, Luftdrosselspule 6 vorgeschaltet.The arc to be fed is denoted by i. The series circuit of a capacitor 2 and an ohmic resistor 3 is connected in parallel to its terminals. A smoothing choke coil 5 of conventional design and an air choke coil 6 are connected upstream of the rectifier 4 supplying the direct voltage.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES4742D DE891416C (en) | 1941-12-24 | 1941-12-24 | Arrangement for feeding a direct current arc via a controllable rectifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES4742D DE891416C (en) | 1941-12-24 | 1941-12-24 | Arrangement for feeding a direct current arc via a controllable rectifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE891416C true DE891416C (en) | 1953-09-28 |
Family
ID=7470920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES4742D Expired DE891416C (en) | 1941-12-24 | 1941-12-24 | Arrangement for feeding a direct current arc via a controllable rectifier |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE891416C (en) |
-
1941
- 1941-12-24 DE DES4742D patent/DE891416C/en not_active Expired
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