EP1325263A1 - Sic igniting arrangement - Google Patents

Sic igniting arrangement

Info

Publication number
EP1325263A1
EP1325263A1 EP01982357A EP01982357A EP1325263A1 EP 1325263 A1 EP1325263 A1 EP 1325263A1 EP 01982357 A EP01982357 A EP 01982357A EP 01982357 A EP01982357 A EP 01982357A EP 1325263 A1 EP1325263 A1 EP 1325263A1
Authority
EP
European Patent Office
Prior art keywords
glow
sic
igniter
starter
arrangement
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.)
Withdrawn
Application number
EP01982357A
Other languages
German (de)
French (fr)
Inventor
Frank NÖLLE
Michael Kuntz
Rüdiger Nass
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nanogate-Gemki GmbH
Original Assignee
Nanogate-Gemki GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nanogate-Gemki GmbH filed Critical Nanogate-Gemki GmbH
Publication of EP1325263A1 publication Critical patent/EP1325263A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23Q—IGNITION; EXTINGUISHING-DEVICES
    • F23Q7/00—Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs
    • F23Q7/22—Details

Definitions

  • the present invention relates to a glow starter with an electronic control circuit.
  • SiC igniters made of SiC without pressure sintering have been known for some time.
  • the problem here is that the heating-up times, until the glow igniters have reached their operating temperature, are generally relatively long. This significantly limits the range of conventional SiC glow igniter arrangements and thus the usability for certain applications.
  • the thermal capacity of the SiC glow starter can in principle be reduced, for example by means of other geometric configurations. If this happens, e.g. by thinning the arrangement, this can lead to mechanical instability, which is undesirable.
  • the cold resistance of the SiC igniter can be reduced by suitable choice of material and / or material treatment. However, if the cold resistance of the igniter is reduced, this can also lead to a changed resistance in the heated state. The reduction in the cold resistance of the detonators is therefore typically accompanied by rapid overheating of the detonators and the associated thermal destruction.
  • SiC glow igniters it is desirable to apply SiC glow igniters to a wider application, particularly those applications in which faster heating times can be achieved. In particular it is It is desirable to achieve heating-up times which make gas burner / water heating applications usable and / or reduce the starting emissions in heating systems by faster ignition of the fuel mixture.
  • the object of the present invention is to provide something new for industrial applicability.
  • a first basic idea of the invention accordingly proposes to use a combination of an SiC glow starter with reduced cold resistance and a voltage supply which provides suitable heating behavior.
  • the line supply can be designed to keep the inrush current at least substantially within a predetermined switch-on value field. It is particularly preferred if the glow igniter arrangement is realized with a pressure-free sintered SiC glow igniter. With this production method, the cold resistances can be set particularly well and cold resistances with a value below or around 300 ohms can be provided. This resistance value already results in such a rapid heating behavior that the application in desired areas can generally be implemented without problems.
  • the line supply is preferably designed to control and / or regulate the inrush current to an end value or into an end value range. In a particularly preferred variant, this is done via a thyristor arrangement connected in series with the glow igniter. Input and / or output diodes can be connected upstream of the thyristor arrangement, which ensure polarity reversal security.
  • the series connection has the advantage that an improved failure safety is given because even if the voltage supply fails briefly, the current is still limited by the glow igniter, so increased operational reliability is guaranteed.
  • the igniter arrangement according to the invention can also be used as a heating element and can in any case be operated in a self-stable manner on mains voltage.
  • the invention is described below only by way of example with reference to the drawing. In this shows:
  • a glow igniter arrangement 1 generally designated 1, comprises a glow igniter 2 and a power supply 3, which is connected in series with the glow igniter 2 between the phases of an AC power network 4.
  • the glow starter 2 which is made in a manner known per se from silicon carbide, has a geometry suitable for a specific application and a cold resistance of around 300 ohms.
  • the SiC glow starter can be used in the usual way
  • the power supply 3 is designed as a two-pole power supply with two input / output poles 3a, 3a '. Behind the input / output poles 3a, 3a ', the access lines branch into an upper 3b and a lower 3b 1 circuit branch. In order to ensure a current and polarity-independent flow of current between these branches, diodes 3cl to 3cIV are connected between the input / output poles 3a, 3a 'and the upper and lower circuit branches 3b, 3b'. First, a thyristor 3d extends between the upper and lower circuit branches 3b, 3b ', to which a current-limiting series resistor 3e is connected. The total current can be determined by the arrangement at the series resistor 3e which limits the stro.
  • the thyristor 3d is driven via the control circuit 3f, which is only shown by way of example and is provided only by way of example with usable component names. This is designed so that the desired current is obtained through the glow starter in the event of voltage fluctuations in the AC power network between 90 and 250 V.
  • the silicon carbide glow igniter properly connected to the circuit in FIG. 1 can be used in gas and water heaters without any problems, regardless of production fluctuations and offers the advantage of only low starting emissions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Resistance Heating (AREA)

Abstract

The invention relates to an igniting arrangement containing an igniting element and a supply line. According to the invention, the igniting element is a SiC igniting element and the supply line is embodied in such a way that it maintains the starting current at least substantially within a predetermined starting current value field.

Description

Titel: SiC-Glühzünder-AnordnungTitle: SiC glow starter arrangement
Beschreibungdescription
Die vorliegende Erfindung betrifft einen Glühzünder mit elektronischer Ansteuerschaltung.The present invention relates to a glow starter with an electronic control circuit.
SiC-Glühzünder aus drucklos gesintertem SiC sind seit einiger Zeit bekannt. Problematisch ist hierbei, daß die Aufheizzei- ten, bis die Glühzünder ihre Betriebstemperatur erreicht haben, im Regelfall relativ lang sind. Dies grenzt die Bandbreite herkömmlicher SiC-Glühzünder-Anordnungen und damit die Nutzbarkeit für bestimmte Anwendungen wesentlich ein.SiC igniters made of SiC without pressure sintering have been known for some time. The problem here is that the heating-up times, until the glow igniters have reached their operating temperature, are generally relatively long. This significantly limits the range of conventional SiC glow igniter arrangements and thus the usability for certain applications.
Um kürzere Aufheizzeiten zu ermöglichen, kann prinzipiell die thermische Kapazität der SiC-Glühzünder herabgesetzt werden, etwa durch andere geometrische Ausgestaltungen. Geschieht dies, z.B. durch dünnere Auslegung der Anordnung, kann dies aber zu mechanischer Instabilität führen, was unerwünscht ist. Alternativ und/oder zusätzlich kann durch geeignete Materialwahl und/oder Materialbehandlung der Kaltwiderstand des SiC-Glühzünders reduziert werden. Wird jedoch der Kaltwider- stand der Zünder reduziert, so kann dies auch zu einem verändertem Widerstand in erwärmtem Zustand führen. Die Herabsetzung des Kaltwiderstandes der Zünder geht daher typisch mit einer schnellen Überhitzung derselben und damit einhergehend deren thermischen Zerstörung einher.In order to enable shorter heating-up times, the thermal capacity of the SiC glow starter can in principle be reduced, for example by means of other geometric configurations. If this happens, e.g. by thinning the arrangement, this can lead to mechanical instability, which is undesirable. Alternatively and / or additionally, the cold resistance of the SiC igniter can be reduced by suitable choice of material and / or material treatment. However, if the cold resistance of the igniter is reduced, this can also lead to a changed resistance in the heated state. The reduction in the cold resistance of the detonators is therefore typically accompanied by rapid overheating of the detonators and the associated thermal destruction.
Es ist wünschenswert, SiC-Glühzünder einer breiteren Anwendung zuzuführen, insbesondere solchen Anwendungen, bei denen schnellere Aufheizzeiten erzielbar sind. Insbesondere ist es wünschenswert, Aufheizzeiten zu erzielen, die Gasbrenner- / Wasserheiz-Anwendungen nutzbar machen und/oder bei Heizanlagen durch schnellere Zündung des Brenngemisches die Startemissionen verringern.It is desirable to apply SiC glow igniters to a wider application, particularly those applications in which faster heating times can be achieved. In particular it is It is desirable to achieve heating-up times which make gas burner / water heating applications usable and / or reduce the starting emissions in heating systems by faster ignition of the fuel mixture.
Die Aufgabe der vorliegenden Erfindung besteht darin, Neues für die gewerbliche Anwendbarkeit bereitzustellen.The object of the present invention is to provide something new for industrial applicability.
Die Lösung dieser Aufgabe wird in unabhängiger Form bean- sprucht.The solution to this task is claimed in an independent form.
Ein erster Grundgedanke der Erfindung schlägt demgemäß vor, eine Kombination aus einem SiC-Glühzünder mit verringertem Kaltwiderstand und eine Spannungsversorgung zu verwenden, die ein geeignetes Aufheizverhalten vorsieht.A first basic idea of the invention accordingly proposes to use a combination of an SiC glow starter with reduced cold resistance and a voltage supply which provides suitable heating behavior.
Das Vorsehen einer das Aufheizverhalten beeinflußenden Spannungsversorgung ermöglicht, den SiC-Fertigungsausschuß zu verringern, indem fertigungsbedingte Kaltwiderstandsschwan- kungen der Zündelemente kompensiert werden. Weiter ist es möglich, die Variantenvielfalt zu reduzieren, weil ein einzigen Zünder für alle Arten typischer Spannungsversorgung wie 120V- und 230V-Leistungsnetze nutzbar ist. Es ist möglich, die Spannungsversorgung so auszulegen, daß sich insgesamt ei- ne erhöhte Wirtschaftlichkeit der Gesamtanordnung ergibt.The provision of a voltage supply which influences the heating behavior makes it possible to reduce the SiC production scrap by compensating for fluctuations in the resistance of the ignition elements caused by production. It is also possible to reduce the number of variants, because a single igniter can be used for all types of typical voltage supply such as 120V and 230V power networks. It is possible to design the power supply in such a way that the overall arrangement is more economical.
Es ist möglich und bevorzugt, als Glühzünder einen SiC- Glühzünder zu verwenden, da sich dieser besonders gut fertig läßt, zugleich die Beständigkeit hoch ist und der Kaltwider- stand gut variiert werden kann. Für einen solchen Silicium- karbid-Glühzünder kann die die Leitungssversorgung dazu ausgebildet sein, den Einschaltstrom zumindest im wesentlichen innerhalb eines vorgegebenen Einschaltwerte-Feldes zu halten. Besonders bevorzugt ist dabei wenn die Glühzünder-Anordnung mit einem drucklos gesinterter SiC-Glühzünder realisiert ist. Bei dieser Herstellungsweise lassen sich besonders gut die Kaltwiderstände einstellen und es können Kaltwiderstand mit einem Wert unter oder um 300 Ohm vorgesehen werden. Dieser Widerstandswert ergibt bereits ein so schnelles Aufheizverhalten, daß sich die Anwendung in gewünschten Gebieten im Regelfall problemfrei realisieren läßt.It is possible and preferred to use an SiC glow starter as the glow starter, since this can be finished particularly well, at the same time the resistance is high and the cold resistance can be varied well. For such a silicon carbide glow starter, the line supply can be designed to keep the inrush current at least substantially within a predetermined switch-on value field. It is particularly preferred if the glow igniter arrangement is realized with a pressure-free sintered SiC glow igniter. With this production method, the cold resistances can be set particularly well and cold resistances with a value below or around 300 ohms can be provided. This resistance value already results in such a rapid heating behavior that the application in desired areas can generally be implemented without problems.
Die Leitungsversorgung ist bevorzugt dazu ausgebildet, den Einschaltstrom gesteuert und/oder geregelt auf einen Endwert oder in einen Endwertebereich zu führen. In einer besonders bevorzugten Variante geschieht dies über eine in Serie mit dem Glühzünder geschaltete Thyristoranordnung. Der Thyristoranordnung können Ein- und/oder Ausgangsdioden vorgeschaltet sein, die eine Verpolungssicherheit gewährleisten. Die Reihenschaltung hat den Vorteil , daß eine verbesserte Versagenssicherheit schon deshalb gegeben ist, weil auch bei kurz- i schliessendem Versagen der Spannungsverorgung der Strom noch durch den Glühzünder begrenzt wird, also eine erhöhte Betriebssicherheit gewährleistet ist.The line supply is preferably designed to control and / or regulate the inrush current to an end value or into an end value range. In a particularly preferred variant, this is done via a thyristor arrangement connected in series with the glow igniter. Input and / or output diodes can be connected upstream of the thyristor arrangement, which ensure polarity reversal security. The series connection has the advantage that an improved failure safety is given because even if the voltage supply fails briefly, the current is still limited by the glow igniter, so increased operational reliability is guaranteed.
Es ist möglich, die Anordung so auszubilden, daß über ein einziges Element der Soll-Strom vorgegeben wird. Dies erlaubt eine einfache und bequeme Vorgabe und Veränderung von Sollwerten.It is possible to design the arrangement in such a way that the target current is specified via a single element. This allows a simple and convenient specification and change of setpoints.
Die erfindungsgemäße Zünderanordnung kann erforderlichenfalls auch selbst als Heizelement eingesetzt werden und kann jedenfalls eigenstabil an Netzspannung betrieben werden. Die Erfindung wird im folgenden nur beispielsweise anhand der Zeichnung beschrieben. In dieser zeigt:If necessary, the igniter arrangement according to the invention can also be used as a heating element and can in any case be operated in a self-stable manner on mains voltage. The invention is described below only by way of example with reference to the drawing. In this shows:
Fig. 1 eine Schaltungsanordnung mit einem Schaltplan für eine Spannungsversorgung eines SiC-1 shows a circuit arrangement with a circuit diagram for a voltage supply of an SiC
Glühzünders;electric igniter;
Fig. 2a, 2b, 2c SiC-Glühzünder in verschiedenen Geometrien gemäß der vorliegenden Erfindung.2a, 2b, 2c SiC glow igniter in different geometries according to the present invention.
Nach Fig. 1 umfaßt eine allgemein mit 1 bezeichnete Glühzünder-Anordnung 1 einen Glühzünder 2 und eine Leistungsversorgung 3, die in Serie mit dem Glühzünder 2 zwischen die Phasen eines Wechselspannungsleistungsnetzes 4 gelegt ist.1, a glow igniter arrangement 1, generally designated 1, comprises a glow igniter 2 and a power supply 3, which is connected in series with the glow igniter 2 between the phases of an AC power network 4.
Nach Fig. 2 weist der Glühzünder 2, der in per se bekannter Weise aus Siliziu carbid hergestellt ist, eine für eine bestimmte Anwendung geeignete Geometrie und einen Kaltwider- stand um 300 Ohm auf. Der SiC-Glühzünder kann in üblicher2, the glow starter 2, which is made in a manner known per se from silicon carbide, has a geometry suitable for a specific application and a cold resistance of around 300 ohms. The SiC glow starter can be used in the usual way
Weise mit Anschlüssen versehen sein (vergleiche Fig. 2a) , die seinen elektrischen Anschluß an die Spannungsversorgung erleichtern und eine Halterung in geeigneter Position relativ zu einerBe provided with connections (see Fig. 2a) that facilitate its electrical connection to the power supply and a holder in a suitable position relative to one
Die Leistungsversorgung 3 ist als zweipolige Leistungsversorgung mit zwei Ein-/Ausganspolen 3a, 3a' gebildet. Hinter den Ein-/Ausganspolen 3a, 3a' zweigen die Zugangsleitungen in einen oberen 3b und einen unteren 3b1 Schaltungszweig auf. Um einen polungs- und phasenlagenunabhängigen Stromfluß zwischen diesen Zweigen zu gewährleisten, sind zwischen die Ein- /Ausganspolen 3a, 3a' und die oberen und unteren Schaltungszweige 3b, 3b' Dioden 3cl bis 3cIV geschaltet. Zwischen die oberen und unteren Schaltungszweige 3b, 3b' erstreckt sich zunächst ein Thyristor 3d, dem einem strombegrenzenden Reihenwiderstand 3e zugeschaltet ist. Am stro be- grenzenden Reihenwiderstand 3e kann der Gesamtstrom durch die Anordnung bestimmt werden.The power supply 3 is designed as a two-pole power supply with two input / output poles 3a, 3a '. Behind the input / output poles 3a, 3a ', the access lines branch into an upper 3b and a lower 3b 1 circuit branch. In order to ensure a current and polarity-independent flow of current between these branches, diodes 3cl to 3cIV are connected between the input / output poles 3a, 3a 'and the upper and lower circuit branches 3b, 3b'. First, a thyristor 3d extends between the upper and lower circuit branches 3b, 3b ', to which a current-limiting series resistor 3e is connected. The total current can be determined by the arrangement at the series resistor 3e which limits the stro.
Der Thyristor 3d wird über die nur beispielhaft wiedergegebene und nur beispielhaft mit verwendbaren Bauelementbezeich- nungen versehene Ansteuerungsbeschaltung 3f angesteuert. Diese ist so ausgebildet, daß bei SpannungsSchwankungen des Wechselspannungsleistungsnetzes zwischen 90 und 250 V der gewünschte Strom durch den Glühzünder erhalten wird.The thyristor 3d is driven via the control circuit 3f, which is only shown by way of example and is provided only by way of example with usable component names. This is designed so that the desired current is obtained through the glow starter in the event of voltage fluctuations in the AC power network between 90 and 250 V.
Der ordnungsgemäß an die Schaltung an Fig. 1 angeschlossene Siliziumcarbid-Glühzünder läßt sich problemfrei in Gas- und Wasserheizern verwenden, und zwar unabhängig von Fertigungsschwankungen und bietet hierbei den Vorteil nur geringer Startimmissionen. The silicon carbide glow igniter properly connected to the circuit in FIG. 1 can be used in gas and water heaters without any problems, regardless of production fluctuations and offers the advantage of only low starting emissions.

Claims

Patentansprüche claims
1. Glühzünder-Anordnung mit einem Glühzünder und einer Leitungsversorgung, dadurch gekennzeichnet, daß der Glühzünder ein SiC-Glühzünder ist und die Leistungssversorgung dazu ausgebildet ist, den Einschaltstrom zumindest im wesentlichen innerhalb eines vorgegebenen Einschaltwerte- Feldes zu halten.1. Glow starter arrangement with a glow starter and a line supply, characterized in that the glow starter is a SiC glow starter and the power supply is designed to keep the inrush current at least substantially within a predetermined switch-on value field.
2. Glühzünder-Anordnung nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß der Glühzünder ein drucklos gesinterter SiC-Glühzünder ist.2. Glow igniter arrangement according to the preceding claim, characterized in that the glow igniter is a pressure-sintered SiC glow igniter.
3. Glühzünder-Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kaltwiderstand des SiC-Glühzünders einen Wert unter oder um 300 Ohm aufweist .3. Glow starter arrangement according to one of the preceding claims, characterized in that the cold resistance of the SiC glow starter has a value below or around 300 ohms.
4. Glühzünder-Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Leitungsversorgung dazu ausgebildet ist, den Einschaltstrom gesteuert und/oder geregelt auf einen Endwert oder in einen Endwertebereich zu führen.4. Glow igniter arrangement according to one of the preceding claims, characterized in that the line supply is designed to control and / or regulate the inrush current to a final value or in a final value range.
Glühzünder-Anordnung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Leitungsversorgung dazu ausgebildet ist, im Netz auftretende Spannungsschwankungen zu kompensieren. Glow igniter arrangement according to one of the preceding claims, characterized in that the line supply is designed to compensate for voltage fluctuations occurring in the network.
EP01982357A 2000-09-26 2001-09-26 Sic igniting arrangement Withdrawn EP1325263A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10048021 2000-09-26
DE2000148021 DE10048021A1 (en) 2000-09-26 2000-09-26 SiC electric igniter assembly
PCT/EP2001/011116 WO2002027241A1 (en) 2000-09-26 2001-09-26 Sic igniting arrangement

Publications (1)

Publication Number Publication Date
EP1325263A1 true EP1325263A1 (en) 2003-07-09

Family

ID=7657930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01982357A Withdrawn EP1325263A1 (en) 2000-09-26 2001-09-26 Sic igniting arrangement

Country Status (4)

Country Link
EP (1) EP1325263A1 (en)
AU (1) AU2002213964A1 (en)
DE (1) DE10048021A1 (en)
WO (1) WO2002027241A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10330086A1 (en) * 2003-07-03 2005-01-27 J. Eberspächer GmbH & Co. KG Method for operating a Glühzündelements a vehicle heater when starting the vehicle heater
DE102004025772A1 (en) 2004-05-26 2005-12-22 J. Eberspächer GmbH & Co. KG Method for operating a Glühzündelements a vehicle heater

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2829700A1 (en) * 1978-07-06 1980-01-17 Bosch Gmbh Robert METHOD FOR PREHEATING COMBUSTION ENGINES OF DIESEL O.AE. DESIGN WITH GLOW PLUGS
US4399781A (en) * 1980-01-31 1983-08-23 Nippondenso Co., Ltd. Engine preheating control system having automatic control of glow plug current
US5786565A (en) * 1997-01-27 1998-07-28 Saint-Gobain/Norton Industrial Ceramics Corporation Match head ceramic igniter and method of using same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0227241A1 *

Also Published As

Publication number Publication date
AU2002213964A1 (en) 2002-04-08
DE10048021A1 (en) 2002-04-11
WO2002027241A1 (en) 2002-04-04

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