DE1014641B - Automatic control device for self-excited high-frequency generators to adapt the load resistance to the limit resistance of the generator - Google Patents
Automatic control device for self-excited high-frequency generators to adapt the load resistance to the limit resistance of the generatorInfo
- Publication number
- DE1014641B DE1014641B DES27387A DES0027387A DE1014641B DE 1014641 B DE1014641 B DE 1014641B DE S27387 A DES27387 A DE S27387A DE S0027387 A DES0027387 A DE S0027387A DE 1014641 B DE1014641 B DE 1014641B
- Authority
- DE
- Germany
- Prior art keywords
- circuit
- generator
- anode
- resistance
- self
- 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.)
- Pending
Links
- 230000000694 effects Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/04—Sources of current
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Ac-Ac Conversion (AREA)
Description
DEUTSCHESGERMAN
Hochfrequenz-Generatoren werden in der Industrie für die verschiedensten Behandlungen eines Gutes im Kondensator- oder Spulenfeld verwendet. Es ist bekannt, diese Generatoren, die zeitweilig mit unterschiedlicher Last arbeiten, zur besseren Ausnutzung des Generators dem sich ändernden Belastungswiderstand anzupassen, und zwar durch Verstellung des Lastkreises mit Hilfe eines Verstellorgans. Eine solche Verstellung des Lastkreises bringt jedoch erhebliche Schwierigkeiten mit sich, da sich mit der Änderung des Lastkreises auch die Frequenz ändert. ■Im Gegensatz hierzu bezieht sich der Gegenstand der Erfindung auf eine selbsttätige Regeleinrichtung für selbsterregte Hochfrequenz-Generatoren, bei der das Gitter und die Anode vor Überlastung geschützt und gleichzeitig eine optimale Leistungsanpassung erzielt wird, wobei das regelnde Organ außerhalb des frequenzbestimmenden Kreises angeordnet ist, so daß keine Blindleistung auftritt. Dies wird gemäß der Erfindung dadurch erreicht, daß gleichzeitig eine dem Anodenstromkreis und dem Gitterstromkreis entnommene Spannung mit einer Normalspannung verglichen und über ein polarisiertes Relais an je einem mit einem im Anodenkreis außerhalb des frequenzbestimmenden Kreises angeordneten Doppelvariometer verbundenen Verstellmotor so lange zur Wirkung gebracht wird, bis die dem Anodengleichstromkreis bzw. die dem Gitterstromkreis entnommene Spannung und deren zugehörige Vergleichsspannungen einander gleich sind.High frequency generators are used in the industry for a wide variety of treatments of a good Capacitor or coil field used. It is known these generators that are intermittently different with Work load, for better utilization of the generator to the changing load resistance adapt by adjusting the load circuit with the help of an adjusting device. One However, such adjustment of the load circuit brings considerable difficulties, since with the Changing the load circuit also changes the frequency. ■ In contrast, the subject relates to the Invention of an automatic control device for self-excited high-frequency generators, in which the The grid and the anode are protected from overload and at the same time an optimal power adjustment is achieved is, wherein the regulating member is arranged outside of the frequency-determining circle, so that no reactive power occurs. This is achieved according to the invention in that at the same time one of the The anode circuit and the voltage taken from the grid circuit are compared with a normal voltage and via a polarized relay to one each with one in the anode circuit outside the frequency-determining one Circular arranged double variometer connected adjusting motor so long brought into effect is until the voltage taken from the anode DC circuit or the grid circuit and whose associated equivalent voltages are equal to one another.
Die Wirkungsweise und die Vorteile der Einrichtung nach der Erfindung werden an Hand eines in der Zeichnung dargestellten Schaltungsbeispiels näher erläutert. The mode of operation and the advantages of the device according to the invention are based on one in the Drawing illustrated circuit example explained in more detail.
Der Arbeitskreis des Generators, bestehend aus einer Induktionsspule 1 und dem Kondensator 2, wird über eine veränderliche Induktivität 3 von dem Generatorstrom gespeist. Diese Induktivität, die erfindungsgemäß als Doppelvariometer ausgeführt ist, erlaubt es, neben ihrer Veränderlichkeit der Gesamtinduktivität auch die Rückkopplungsspannung veränderlich auszukoppeln. Diese wird in üblicher Weise dem Gitter der Generatorröhre zugeführt. Zur Verstellung der Gesamtinduktivität des Doppelvariometers ist der Verstellmotor 4 vorgesehen und zur Änderung des Rückkopplungsgrades mittels des Variometers der Verstellmotor 5. Der Motor 4 wird von dem polarisierten Relais 6 gesteuert, dem einerseits von einer Hilfsspannungsquelle 7 eine konstante Vergleichsspannung zugeführt wird und andererseits eine am Widerstand 8 abgegriffene, dem Anodenstrom proportionale Spannung. Der Motor 5 wird von dem polarisierten Relais 9, dem wiederum die konstante Vergleichsspannung und eine am Widerstand 10 abge-The working circuit of the generator, consisting of an induction coil 1 and the capacitor 2, is fed by the generator current via a variable inductance 3. This inductance, according to the invention is designed as a double variometer, it allows, in addition to its variability of the total inductance also to couple out the feedback voltage in a variable manner. This is done in the usual way fed to the grid of the generator tube. For adjusting the total inductance of the double variometer the adjusting motor 4 is provided and for changing the degree of feedback by means of the variometer Adjusting motor 5. The motor 4 is controlled by the polarized relay 6, on the one hand by a Auxiliary voltage source 7 is supplied with a constant comparison voltage and on the other hand an am Resistor 8 tapped voltage proportional to the anode current. The motor 5 is polarized by the Relay 9, to which in turn the constant reference voltage and one connected to resistor 10
Selbsttätige Regeleinrichtung
für selbsterregte Hochfrequenz-Generatoren zur Anpassung
des Belastungswiderstandes
an den Grenzwiderstand des GeneratorsAutomatic control device
for self-excited high-frequency generators for adaptation
the load resistance
to the limit resistance of the generator
Anmelder:Applicant:
Siemens-SchuckertwerkeSiemens-Schuckertwerke
Aktiengesellschaft,Corporation,
Berlin und Erlangen,Berlin and Erlangen,
Erlangen, Werner-von-Siemens-Str. 50Erlangen, Werner-von-Siemens-Str. 50
Walther Emil, Nürnberg,
ist als Erfinder genannt wordenWalther Emil, Nuremberg,
has been named as the inventor
griffene, dem Gitterstrom proportionale Spannung zugeführt wird, gesteuert.gripped voltage proportional to the grid current is fed.
Wird das Behandlungsgut, beispielsweise bei induktiver Erwärmung ein zu glühendes Werkstück, in die Glühspule 1 eingebracht und der Generator in Betrieb gesetzt, so schwingt er mit der Frequenz des Arbeitskreises. Steigt der Anodengleichstrom über seinem zulässigen Maximalwert an, beispielsweise infolge schlechter Anpassung der Last, so spricht das polarisierte Relais 6 an und verstellt über den Motor 4 die Induktivität des Variometers. Die Induktivität wird hierbei so lange erhöht, bis der Anodengleichstrom seinen Sollwert erreicht hat. Wird der Arbeitskreis entlastet, so fällt der Anodengleichstrom, und das polarisierte Relais spricht umgekehrt an und verkleinert die Induktivität des Anodenkreises entsprechend. If the item to be treated, for example in the case of inductive heating, a workpiece to be glowed, is inserted into the When the glow coil 1 is introduced and the generator is put into operation, it oscillates at the frequency of the working circuit. If the anode direct current increases above its maximum permissible value, for example as a result of poor adaptation of the load, the polarized relay 6 responds and adjusts the motor 4 via the Variometer inductance. The inductance is increased until the anode direct current has reached its setpoint. If the work group is relieved, the anode direct current falls, and that polarized relay responds in reverse and reduces the inductance of the anode circuit accordingly.
Gleichzeitig wird unter dem Einfluß des Relais 9 über den Motor 5 mittels des Doppelvariometers noch der Rückkopplungsgrad verstellt.At the same time, under the influence of the relay 9 via the motor 5 by means of the double variometer the degree of feedback is adjusted.
AA^ird der Generator nicht, wie oben angenommen, induktiv, sondern kapazitiv belastet, indem das zu behandelnde Gut in dem Kondensator 2 der Einwirkung des Hochfrequenzfeldes ausgesetzt wird, so ändert sich an der Schaltung im wesentlichen nichts; es muß nur dafür gesorgt werden, daß der Motor 4 das Doppelvariometer im umgekehrten Sinne verstellt.AA ^ the generator is not, as assumed above, inductively, but capacitively loaded by the to be treated Well exposed in the capacitor 2 to the action of the high frequency field, so changes essentially nothing in the circuit; it only has to be ensured that the motor 4 does Double variometer adjusted in the opposite direction.
Claims (1)
USA.-Patentschriften Nr. 2 453 529, 2 588 304;
britische Patentschrift Nr. 616 795.Considered publications:
U.S. Patent Nos. 2,453,529, 2,588,304;
British Patent No. 616,795.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES27387A DE1014641B (en) | 1952-02-26 | 1952-02-26 | Automatic control device for self-excited high-frequency generators to adapt the load resistance to the limit resistance of the generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES27387A DE1014641B (en) | 1952-02-26 | 1952-02-26 | Automatic control device for self-excited high-frequency generators to adapt the load resistance to the limit resistance of the generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1014641B true DE1014641B (en) | 1957-08-29 |
Family
ID=7479067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES27387A Pending DE1014641B (en) | 1952-02-26 | 1952-02-26 | Automatic control device for self-excited high-frequency generators to adapt the load resistance to the limit resistance of the generator |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1014641B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2368198A1 (en) * | 1976-10-13 | 1978-05-12 | Monsanto Co | INDUCTION HEATING CIRCUITS FOR TREATMENT OF SEMICONDUCTOR BARS BY ZO FUSION |
| EP0537565A3 (en) * | 1991-10-14 | 1993-05-26 | Siemens Aktiengesellschaft | Induction heating circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2453529A (en) * | 1943-07-19 | 1948-11-09 | Mittelmann Eugene | Method of high-frequency heating |
| GB616795A (en) * | 1944-07-21 | 1949-01-27 | Eugene Mittelmann | Improvements relating to high frequency electrical heating |
| US2588304A (en) * | 1946-05-11 | 1952-03-04 | Sunbeam Corp | High-frequency induction heating apparatus |
-
1952
- 1952-02-26 DE DES27387A patent/DE1014641B/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2453529A (en) * | 1943-07-19 | 1948-11-09 | Mittelmann Eugene | Method of high-frequency heating |
| GB616795A (en) * | 1944-07-21 | 1949-01-27 | Eugene Mittelmann | Improvements relating to high frequency electrical heating |
| US2588304A (en) * | 1946-05-11 | 1952-03-04 | Sunbeam Corp | High-frequency induction heating apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2368198A1 (en) * | 1976-10-13 | 1978-05-12 | Monsanto Co | INDUCTION HEATING CIRCUITS FOR TREATMENT OF SEMICONDUCTOR BARS BY ZO FUSION |
| EP0537565A3 (en) * | 1991-10-14 | 1993-05-26 | Siemens Aktiengesellschaft | Induction heating circuit |
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