DE887089C - Method for controlling high frequency generators for industrial or medical purposes - Google Patents
Method for controlling high frequency generators for industrial or medical purposesInfo
- Publication number
- DE887089C DE887089C DES9742D DES0009742D DE887089C DE 887089 C DE887089 C DE 887089C DE S9742 D DES9742 D DE S9742D DE S0009742 D DES0009742 D DE S0009742D DE 887089 C DE887089 C DE 887089C
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- industrial
- high frequency
- medical purposes
- change
- 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
- 238000000034 method Methods 0.000 title claims description 8
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012544 monitoring process 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
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
- H05B6/50—Circuits for monitoring or control
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Description
Die Erfindung bezieht sich auf Hochfrequenzgeneratoren zur Behandlung eines Gutes in einem Frequenzbereich, der etwa einer Wellenlänge zwischen io und roo m und darunter entspricht. Derartige Generatoren werden für industrielle Zwecke, beispielsweise zur Erwärmung von Werkstoffen oder auch für medizinische Zwecke angewendet. Das zu behandelnde Gut wird dabei entweder in das magnetischeFeld einerHochfrequenzspule oder in das elektrische Feld eines Hochfrequenzkondensators eingebracht.The invention relates to high frequency generators for treatment of a good in a frequency range that is roughly a wavelength between io and roo m and below corresponds to. Such generators are used for industrial purposes, for example used for heating materials or for medical purposes. The material to be treated is either placed in the magnetic field of a high-frequency coil or introduced into the electric field of a high frequency capacitor.
Gegenstand der Erfindung ist ein Verfahren zur Steuerung solcher Hochfrequenzgeneratoren, welches auf dem Sondergebiet der Anwendung hochfrequenter Wechselströme für industrielle oder medizinische Zwecke gegenüber bekannten Steuerverfahren wesentliche Vereinfachungen mit sich bringt. Gemäß der Erfindung wird die Steuerung des Hochfrequenzgenerators von der Frequenzänderung gegenüber einem vorbestimmten Betriebspunkt, insbesondere gegenüber dem Leerlauf-Punkt des Generators, abhängig gemacht. Bisher fehlte ein einfaches Verfahren, um die hochfrequente Leistungsabgabe bzw. die Anpassung oder die Veränderung des behandelten Gutes während des Hochfrequenzbehandlungsvorganges festzustellen bzw. -in Abhängigkeit von dem Ergebnis dieser Feststellung entsprechende Steuerungsmaßnahmen zu treffen. Die Erfindung beruht auf der Erkenntnis, daß die Frequenzänderung des Hochfrequenzgenerators gegenüber einem vorbestimmten Betriebspunkt und vor allem die Frequenzänderung gegenüber dem Leerlaufzustand ein außerordentlich brauchbares Mittel ist, um die für den Betrieb des Generators wesentlichen Betriebsgrößen daraus abzuleiten und den Generator entsprechend zu steuern.The invention relates to a method for controlling such high-frequency generators, which in the special field of the application of high-frequency alternating currents for industrial or medical purposes compared to known tax procedures brings with it. According to the invention, the control of the high frequency generator of the frequency change compared to a predetermined operating point, in particular made dependent on the idling point of the generator. So far one was missing simple procedure to the high-frequency power output or the adaptation or the change in the treated goods during the high-frequency treatment process to be determined or - depending on the result of this determination To take control measures. The invention is based on the knowledge that the Frequency change of the high frequency generator compared to a predetermined operating point and above all the change in frequency compared to the idle state is extraordinary A useful means is to determine the operating parameters that are essential for the operation of the generator derive from this and control the generator accordingly.
In der Zeichnung ist in einemDiagramm der Zusammenhang zwischen der Frequenzänderung des Hochfrequenzgenerators einerseits und mehreren wichtigen Betriebsgrößen des Generators andererseits dargestellt. In dem Diagramm "ist als Abszisse derBelastungsstrom in demBereich zwischenLeerlauf und Kurzschluß dargestellt, während als Ordinaten die Frequenzänderung und die Klemmenspannung angegeben sind. Die Kennlinie für die Frequenzänderung ist mit i bezeichnet, während die Kennlinie der Klemmenspannung mit 2 bezeichnet ist. Die Klemmenspannung behält, ausgehend vom Leerlaufpunkt, zunächst ihren Wert bei, bis sie nahe dem Kurzschluß stark absinkt. In dem Diagramm sind außerdem noch Linien 3 konstanter Leistung eingetragen. Etwa bei Punkt 4 liegt der Betriebspunkt der höchsten Leistung. Das Diagramm läßt erkennen,adaß die Frequenzänderung gegenüber dem Leerlaufpunkt, wie sie durch die Kennlinie r wiedergegeben ist, ein besonders brauchbares Maß für die überwachung des Betriebes des Hochfrequenzgenerators ist. Die Größe der Frequenzänderung kann unmittelbar benutzt werden, um beispielsweise den Betrieb maximaler Leistung des Hochfrequenzgeneratars einzustellen. Es können Einrichtungen zur Messung von Betriebsgrößen oder Geräte zur selbsttätigen Steuerung des Generators in Abhängigkeit von solchen Betriebsgrößen als von der Frequenzänderung abhängige Geräte ausgebildet und auf die gewünschte Betriebsgröße des Generators geeicht werden.In the drawing there is a diagram showing the relationship between the Frequency change of the high frequency generator on the one hand and several important operating variables of the generator on the other hand. In the diagram, "is the load current as the abscissa shown in the area between open circuit and short circuit, while as ordinates the frequency change and the terminal voltage are specified. The characteristic for the Frequency change is denoted by i, while the characteristic curve of the terminal voltage is denoted by 2. The terminal voltage initially retains, starting from the no-load point their value at until it drops sharply near the short circuit. In the diagram are also entered lines 3 of constant power. At about point 4 is the Operating point of the highest performance. The diagram shows that the frequency change compared to the idle point, as shown by the characteristic curve r particularly useful measure for monitoring the operation of the high-frequency generator is. The size of the frequency change can be used directly, for example to stop operating the high-frequency generator at maximum power. It can Devices for measuring operational variables or devices for automatic control of the generator as a function of such operating parameters as the change in frequency dependent devices and trained on the desired operating size of the generator to be calibrated.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES9742D DE887089C (en) | 1942-08-01 | 1942-08-01 | Method for controlling high frequency generators for industrial or medical purposes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES9742D DE887089C (en) | 1942-08-01 | 1942-08-01 | Method for controlling high frequency generators for industrial or medical purposes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE887089C true DE887089C (en) | 1953-08-20 |
Family
ID=7473084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES9742D Expired DE887089C (en) | 1942-08-01 | 1942-08-01 | Method for controlling high frequency generators for industrial or medical purposes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE887089C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE961555C (en) * | 1944-07-29 | 1957-04-11 | Siemens Ag | Circuit arrangement for generating high-frequency vibrations for industrial purposes |
| DE1026410B (en) * | 1955-02-02 | 1958-03-20 | Wilhelm Waesch Dr Ing | Method for controlling an HF generator which can be changed in a narrow frequency range for industrial or medical purposes |
-
1942
- 1942-08-01 DE DES9742D patent/DE887089C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE961555C (en) * | 1944-07-29 | 1957-04-11 | Siemens Ag | Circuit arrangement for generating high-frequency vibrations for industrial purposes |
| DE1026410B (en) * | 1955-02-02 | 1958-03-20 | Wilhelm Waesch Dr Ing | Method for controlling an HF generator which can be changed in a narrow frequency range for industrial or medical purposes |
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