DE1093503B - Method for regulating the output of medium frequency induction heating systems - Google Patents
Method for regulating the output of medium frequency induction heating systemsInfo
- Publication number
- DE1093503B DE1093503B DEA33796A DEA0033796A DE1093503B DE 1093503 B DE1093503 B DE 1093503B DE A33796 A DEA33796 A DE A33796A DE A0033796 A DEA0033796 A DE A0033796A DE 1093503 B DE1093503 B DE 1093503B
- Authority
- DE
- Germany
- Prior art keywords
- shadow
- medium
- measuring
- proportional
- regulating
- 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
- 238000010438 heat treatment Methods 0.000 title claims description 8
- 238000000034 method Methods 0.000 title claims description 6
- 230000001105 regulatory effect Effects 0.000 title claims description 6
- 230000006698 induction Effects 0.000 title claims description 4
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000005284 excitation Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims 1
- 230000033228 biological regulation Effects 0.000 description 6
- 238000004804 winding Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
- G01J5/22—Electrical features thereof
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B1/00—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values
- G05B1/01—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric
- G05B1/02—Comparing elements, i.e. elements for effecting comparison directly or indirectly between a desired value and existing or anticipated values electric for comparing analogue signals
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- General Induction Heating (AREA)
Description
Die induktive Erwärmung ist für Zwecke des Glühens, Härtens, Schmiedens und Schmelzens bekannt. In der Vielzahl der Anwendungsfälle sind motorisch angetriebene Frequenzumformer vorgesehen, die entweder zu mehreren ein Sammelschienensystem einspeisen oder aber auch als einzelne Umformer eine Erwärmungsanlage direkt speisen. Die Regelung dieser Umformer besteht darin, die Mittelfrequenzspannung konstant zu halten, indem die Erregung des Mittel-Inductive heating is known for purposes of annealing, hardening, forging and melting. In the majority of applications, motor-driven frequency converters are provided, which either feed several busbar systems or one as individual converters Feed the heating system directly. The regulation of this converter consists in the medium frequency voltage constant by the excitation of the central
Verfahren zur Regelung der LeistungProcedure for regulating the performance
von Mittelfrequenz-Induktions-of medium frequency induction
erwärmungsanlagenheating systems
Anmelder:
Allgemeine Elektricitäts-Gesellschaft,Applicant:
General Electric Company,
Aktiengesellschaft,
Krefeld, Oberschlesienstr. 16Corporation,
Krefeld, Oberschlesienstr. 16
Rolf Christ, Remscheid,
ist als Erfinder genannt wordenRolf Christ, Remscheid,
has been named as the inventor
frequenzgenerators geregelt oder gebenenenfalls auch ίο Berlin-Grunewald, Hohenzollerndamm 150, von Hand gesteuert wurde. Eine selbsttätige Regelung -n-, i_ifrequency generator or if necessary also ίο Berlin-Grunewald, Hohenzollerndamm 150, was controlled by hand. An automatic control -n-, i_i
auf konstante Mittelfrequenzspannung wurde beispiels- und Deutsche Edelstahlwerke on constant medium-frequency voltage has been exemplified and Deutsche Edelstahlwerke
weise mittels eines Zweipunktreglers, eines Tirillreglers, erreicht. Eine Maximumauslösung im Sinne einer Abschaltung für Grenzwerte für Spannung und Strom war dabei vorgesehen. Nun bedeutet die Mittelfrequenzspannung einen an und für sich beim Erwärmungsvorgang untergeordneten Wert. Sie wäre nur dann eine wahre Funktion der Leistung, wenn konstanter Leistungsfaktor (cos φ) und konstanter Wider-wisely achieved by means of a two-point controller, a Tirill controller. A maximum release in the sense of a shutdown for limit values for voltage and current was provided. The medium-frequency voltage now means a value that is subordinate in and of itself to the heating process. It would only be a true function of the power if the constant power factor (cos φ) and constant resistance
stand im Arbeitskreis vorhanden wären. Es ist jedoch stood in the working group. However, it is
bekannt, daß diese beiden Bedingungen bei der In- 2known that these two conditions in the In- 2
duktionserwärmung gar nicht erfüllt sind. Das Bestreben mußte also dahin gehen, die Wirkleistung zu gegebene Bereiche selbsttätig ablösen und jeweils
regeln, wesentlich konstant zu halten und diesen Wirk- 25 stets auf ein einziges Stellglied, den Feldsteller, im
leistungswert dort zu halten, wo der Mittelfrequenz- Erregerkreis des Mittelfrequenzgenerators wirken,
generator mit einem guten Wirkungsgrad arbeitet. Die Vorrichtung ist einfach aufgebaut, da einfacheinduction warming are not met at all. The endeavor therefore had to be to automatically replace and regulate the active power for given areas, to keep it essentially constant and to keep this active power value always on a single actuator, the field regulator, where the medium-frequency excitation circuit of the medium-frequency generator is active ,
generator works with good efficiency. The device is simple because it is simple
Hierbei soll gemäß der Erfindung innerhalb der durch elektrische Meßwerke beliebiger Systeme angewandt
maximalen Strom und maximaler Spannung gesetzten werden, wobei es bedeutend ist, ob die Systeme
Grenzen eine Regelung auf konstante Wirkleistung 3° Maximal- oder Effektivwerte oder andere Werte
erfolgen und, wenn der maximal zulässige Stromwert messen, da nur die Gesamtwirkung der Abschattung
erreicht ist, auf diesen bezogen eine Regelung auf
konstanten Strom einsetzen. Ebenso soll auf derHere, according to the invention, maximum current and maximum voltage should be set within the applied by electrical measuring units of any systems, whereby it is important whether the system limits a regulation to constant effective power 3 ° maximum or effective values or other values and, if the maximum Measure the permissible current value, since only the overall effect of the shadowing is achieved, a regulation based on this
use constant current. Likewise, on the
anderen Seite eine Regelung auf konstante Spannung einsetzen, wenn der maximal zulässige Spannungswert erreicht ist. Werden diese maximal zulässigen Werte wieder unterschritten, so soll die Regelung wieder auf der Linie konstanter Wirkleistung erfolgen. on the other side, use a constant voltage regulation when the maximum permissible voltage value is reached. If these maximum permissible values are not reached again, the regulation should take place again on the line of constant active power.
der lichtempfindlichen Zelle zur Regelung beiträgt.the light-sensitive cell contributes to the regulation.
Der Gegenstand der Erfindung sei an Hand eines Beispiels erläutert.The subject matter of the invention will be explained using an example.
Es soll eine kontinuierliche Leistungsregelung für eineMittelfrequenzerwärmungsanlage vorgesehen sein, bei der sowohl der Spannung als auch dem Strom Maximalgrenzen gesetzt sein sollen. Im Diagramm (Fig. 1) ist der Kurvengang gezeichnet. Im normalenA continuous power control should be provided for a medium-frequency heating system, at which both the voltage and the current should be set maximum limits. In the diagram (Fig. 1) the curve is drawn. In normal
ß Kß K
(g ) gg g(g) gg g
Gegenstand der Erfindung ist damit ein Verfahren 4o Betriebsfall soll die Leistung gemäß dem Kurvenzur Regelung von Mittelfrequenzerwärmungsanlagen abschnitt 12 konstant gehalten bleiben. Erreicht je- und eine Vorrichtung zur Ausübung desselben, das doch der Strom im Generator den maximal zulässigen dadurch gekennzeichnet ist, daß zur Regelung der Wert Imax, so soll der Strom gemäß Kurvengang 13 Leistung der belichtungsproportionale veränderliche ohne Rücksicht auf die Leistung konstant gehalten elektrische Ausgangswert eines photoelektrischen 4S werden, bis der Wert Jmax wieder unterschritten wird. Schaltelementes genommen wird, wobei dieses licht- Gleiches soll entsprechend der Marke Umax gelten; empfindliche Element sich in einem Lichtstrahl be- hier soll dann auf konstante Spannung gemäß Kurvenfindet, der von einer oder mehreren Schattenfahnen, zug 11 geregelt werden.The subject of the invention is thus a method 4o operating case, the power according to the curve for regulating medium-frequency heating systems section 12 should remain constant. If each and a device for exercising the same achieves that the current in the generator is characterized by the fact that the value I max is used to control the value I max, the current should be kept constant according to curve 13 output that is variable in proportion to the exposure regardless of the electrical output The starting value of a photoelectric 4S will be until the value falls below J max again. Switching element is taken, this light-the same should apply according to the mark U max; Sensitive element is in a light beam - here it should then be set to constant voltage according to curves, which are regulated by one or more shadow flags, train 11.
deren jede an einem Zeiger auf der Achse eines Meß- Die hierzu notwendige Vorrichtung gemäß der Erwerkes sitzt, dem Ausschlag des Meßwerkes ent- 50 findung ist in den Fig. 2 und 3 schematisch angesprechend mehr oder weniger abgeschattet wird. deutet, wobei in der praktischen Ausführung ver-Hiermit ist ein kontinuierlicher Regelvorgang er- schiedene Formen möglich sind, die vom Gegenstandeach of which is attached to a pointer on the axis of a measuring device according to the Erwerk the deflection of the measuring mechanism is shown schematically in FIGS. 2 and 3 is more or less shaded. interprets, whereby in the practical execution ver- hereby is a continuous control process different shapes are possible, depending on the object
reicht, bei dem in einer Vorrichtung sich z. B. drei Regelgrößen mit ihren Sollwerten für jeweils vorder Erfindung Gebrauch machen. 21, 22 und 23 sind drei elektrische Meßwerke beliebiger Ausführung,is enough, in which z. B. three control variables with their setpoints for each front Invention make use. 21, 22 and 23 are three electrical measuring units of any design,
...... 009 649/358...... 009 649/358
wobei lediglich 21 die Mittelfrequenzwirkleistung, 22 den Generatorstrom und 23 die Mittelfrequenzspannung messen soll. 24, 25 und 26 sind die den Meßwerken zugeordneten Zeiger, die ein zweckmäßig geformtes Schattenblech tragen. 27 ist eine Lampe, deren Lichtstrahl durch die Maske 28 abgegrenzt, gegebenenfalls auch optisch gebündelt wird. 29 ist ein photoelektrisches Schaltelement, beispielsweise eine Photozelle oder ein Photowiderstand, das, sofern nicht durch eines der Schattenbleche der Zeiger 24, 25 oder 26 gehindert, im abgegrenzten Lichtstrahl der Lampe 27 liegt.where only 21 is the medium frequency active power, 22 is the generator current and 23 is the medium frequency voltage should measure. 24, 25 and 26 are the pointers assigned to the measuring mechanisms, which are an expedient wear shaped shadow plate. 27 is a lamp whose light beam is delimited by the mask 28, if necessary also optically bundled. 29 is a photoelectric switching element, for example a photocell or a photoresistor that, if not through one of the shadow plates of the Pointer 24, 25 or 26 prevented from lying in the delimited light beam of the lamp 27.
Gibt der Mittelfrequenzgenerator nun eine bestimmte konstante Leistung ab, so hält das Meßwerk 21 den Zeiger 24 mit der Schattenfahne in einer bestimmten Mittelstellung im Lichtstrahl über der Photozelle 29. Bei Abweichungen vom Sollwert wird über den Strom des photoelektrischen Schaltelementes die Erregung des Generators geregelt. Unabhängig davon nun tritt aber beim Erreichen des maximal zulässigen Stromwertes der Zeiger 25 in den Lichtstrahl ein und übernimmt die Regelung auf konstanten Strom so lange, bis der maximale zulässige Stromwert wieder unterschritten ist. Analog verhält es sich mit dem Meßwerk 23 bei Spannungsüber- as schreitung.If the medium-frequency generator now delivers a certain constant power, the measuring mechanism 21 holds the pointer 24 with the shadow flag in a certain center position in the light beam above the photocell 29. In the event of deviations from the nominal value, the excitation of the generator is regulated via the current of the photoelectric switching element. Regardless of this, however, when the maximum permissible current value is reached, the pointer 25 enters the light beam and controls the constant current until it falls below the maximum permissible current value again. The same applies to the measuring mechanism 23 when the voltage is exceeded.
Es können auch andere physikalische Größen neben den oder statt der genannten durch Anbringen weiterer Meßwerke elektrisch überwacht werden, z. B. die Windungstemperatur des Mittelfrequenzgenerators. Das würde dann erlauben, den maximal zulässigen Strom auch kurzfristig zu überschreiten, solange die Grenztemperatur der Wicklung des Generators noch nicht erreicht ist.Other physical quantities can also be used in addition to or instead of the ones mentioned by adding further Measuring units are monitored electrically, for. B. the winding temperature of the medium frequency generator. This would then allow the maximum permissible current to be exceeded for a short time as long as the The limit temperature of the winding of the generator has not yet been reached.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA33796A DE1093503B (en) | 1960-01-26 | 1960-01-26 | Method for regulating the output of medium frequency induction heating systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA33796A DE1093503B (en) | 1960-01-26 | 1960-01-26 | Method for regulating the output of medium frequency induction heating systems |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1093503B true DE1093503B (en) | 1960-11-24 |
Family
ID=6928303
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA33796A Pending DE1093503B (en) | 1960-01-26 | 1960-01-26 | Method for regulating the output of medium frequency induction heating systems |
Country Status (1)
Country | Link |
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DE (1) | DE1093503B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1183996B (en) * | 1961-08-09 | 1964-12-23 | Sonnenschein Accumulatoren | Arrangement for regulating the voltage or the current of a direct current consumer fed from a direct current source |
DE1296681B (en) * | 1962-10-13 | 1969-06-04 | Philips Nv | Stabilization circuit for voltages from a voltage source with high internal resistance |
-
1960
- 1960-01-26 DE DEA33796A patent/DE1093503B/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1183996B (en) * | 1961-08-09 | 1964-12-23 | Sonnenschein Accumulatoren | Arrangement for regulating the voltage or the current of a direct current consumer fed from a direct current source |
DE1296681B (en) * | 1962-10-13 | 1969-06-04 | Philips Nv | Stabilization circuit for voltages from a voltage source with high internal resistance |
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