EP0445704B1 - Reactor coil, particularly for operating high-pressure metal vapour lamps - Google Patents
Reactor coil, particularly for operating high-pressure metal vapour lamps Download PDFInfo
- Publication number
- EP0445704B1 EP0445704B1 EP91103237A EP91103237A EP0445704B1 EP 0445704 B1 EP0445704 B1 EP 0445704B1 EP 91103237 A EP91103237 A EP 91103237A EP 91103237 A EP91103237 A EP 91103237A EP 0445704 B1 EP0445704 B1 EP 0445704B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- ferrite
- reactor coil
- cross
- sectional area
- 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 - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F37/00—Fixed inductances not covered by group H01F17/00
Definitions
- the invention relates to an oscillating throttle according to the introductory part of patent claim 1.
- High-pressure metal vapor lamps require a high voltage to ignite the arc, which can be about 200 times or more the operating voltage.
- This ignition voltage is generated in a known manner at high frequency by a series resonant circuit from an oscillating choke according to the introductory part of patent claim 1 and an oscillating circuit capacitor, the latter being connected in parallel with the MHD lamp. In the event of resonance, the required ignition voltage is applied to this capacitor.
- the resonance condition requires that the choke be of high quality in order to safely reach the ignition voltage.
- this choke since this choke also limits the combustion current in normal operation, it must have a high inductance at the lamp-related, low frequency.
- the cross-sectional area surrounded by the winding base of the coil former is constant over the length of the air gap and as large as in the area of the field line transition from the air into the ferrite Kerns (see Fig. 1).
- the subclaims relate to preferred embodiments of the oscillating throttle according to claim 1.
- FIG. 1 shows the structure of a conventional known oscillating choke.
- a very large air gap 1 is provided within the winding, which is located on a coil former 2, the surface A of which is surrounded by the winding base 2a has a constant cross section over the length of the air gap 1.
- the size of the cross section B of the surface 1a at the transition of the magnetic field lines from the air into the ferrite of the core 3 is chosen so that the permissible maximum saturation induction of the ferrite used is not exceeded.
- the core 3 ' consists of two E-core halves 3a' each with a middle leg 3c 'shorter than the outer legs 3b'.
- the middle legs 3c 'of the core halves 3a' protrude into a coil former 2 'and leave an air gap 1' between them.
- the cross-sectional area A enclosed by the winding base 2a 'of the coil former 2' is reduced in the area of the air gap 1 'compared to the cross-sectional area B in the area of the field line exit from the air into the ferrite of the core 3', the latter cross-sectional area B being so large that the associated induction just does not bring the ferrite into saturation.
- Fig. 3 shows an embodiment of the oscillating throttle according to the invention, in which the shear is increased so that a central leg can be completely dispensed with in the core 3 ′′.
- the ferrite core 3 ′′ now only consists of a frame that increases the permeability and bundles the outer field lines, as a result of which a magnetic shielding function is achieved.
- a frame construction as in FIG. 3 can also be used in accordance with FIG. 4 for the realization of an oscillating throttle of the type in FIG. 2.
- the short middle leg sections 3c 'of the core 3' present in the oscillating choke according to FIG. 2 to increase the permeability are inserted here in addition to the ferrite frame 3 '''as individual pieces 3e''' made of ferrite into the coil former 2 '''.
- the advantage of the frame construction is that the volume of the coil is reduced by higher core outer legs (Fig. 5) with the same cross-section, and that a good magnetic Shielding is achieved.
- the shielding effect can be further improved in that the ferrite frame core 3 ′′, 3 ′′ ′′ consists of one piece and thus has no air gap as such.
- the coil body 2 ', 2' ', 2' '' is expediently constructed in chamber technology, as shown in the drawing.
- the cross-sectional area enclosed by the bobbin winding base continuously decreases from the ends of the air gap to the center thereof. It is particularly advantageous if the cross-sectional decrease is adapted to the course of the field lines.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Or Transformers For Communication (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
Description
Die Erfindung bezieht sich auf eine Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1.The invention relates to an oscillating throttle according to the introductory part of
Metalldampfhochdrucklampen benötigen zum Zünden des Lichtbogens eine hohe Spannung, die etwa das 200-fache oder mehr der Brennspannung betragen kann. Diese Zündspannung wird in bekannter Weise mit Hochfrequenz durch einen Serienresonanzkreis aus einer Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1 und einem Schwingkreiskondensator erzeugt, wobei der letztere parallel zur MHD-Lampe geschaltet ist. Im Resonanzfall liegt an diesem Kondensator die benötigte Zündspannung. Die Resonanzbedingung erfordert, daß die Drossel eine hohe Güte aufweist, um die Zündspannung sicher zu erreichen.High-pressure metal vapor lamps require a high voltage to ignite the arc, which can be about 200 times or more the operating voltage. This ignition voltage is generated in a known manner at high frequency by a series resonant circuit from an oscillating choke according to the introductory part of
Da aber diese Drossel im Normalbetrieb auch den Brennstrom begrenzt, muß sie bei der lampenbedingten, niedrigen Frequenz eine hohe Induktivität haben.However, since this choke also limits the combustion current in normal operation, it must have a high inductance at the lamp-related, low frequency.
Bei den bekannten Schwingdrosseln gemäß dem einleitenden Teil des Patentanspruchs 1 ist die von dem Wickelgrund des Spulenkörpers umgebene Querschnittsfläche über die Länge des Luftspalts konstant und so groß wie im Bereich des Feldlinienübertritts von der Luft in das Ferrit des Kerns (sh.Fig.1).In the known oscillating chokes according to the introductory part of
Der Erfindung liegt die Aufgabe zugrunde, eine Schwingdrossel gemäß dem einleitenden Teil des Patentanspruchs 1 zu schaffen, die im Vergleich zu den bekannten Schwingdrosseln bei gleichen Abmessungen eine bessere Güte oder bei gleicher Güte kleinere Abmessungen aufweist, d.h. die beiden, sehr unterschiedlichen Betriebsarten:
- a) Hoher Blindstrom bei der Zündresonanzfrequenz ohne Sättigungserscheinungen,
- b) Große Induktivität für den Betrieb mit der Brennfrequenz bei gleichzeitig hoher Güte, um die Leistungsverluste in der Drossel klein zu halten,
volumenoptimiert erfüllt.The invention has for its object to provide an oscillating choke according to the introductory part of
- a) high reactive current at the ignition resonance frequency without saturation,
- b) Large inductance for operation at the burning frequency with high quality at the same time in order to keep the power losses in the choke small,
Volume optimized fulfilled.
Die vorgenannte Aufgabe wird durch die im kennzeichnenden Teil des Patentanspruchs 1 genannten Merkmale gelöst.The above object is achieved by the features mentioned in the characterizing part of
Die Unteransprüche haben bevorzugte Ausführungsformen der Schwingdrossel gemäß Patentanspruch 1 zum Gegenstand.The subclaims relate to preferred embodiments of the oscillating throttle according to
Die Erfindung wird nachstehend anhand der Zeichnung an Ausführungsbeispielen noch näher erläutert.The invention is explained in more detail below with the aid of exemplary embodiments.
In der Zeichnung zeigt :
- Fig.1
- den Aufbau einer herkömmlichen bekannten Schwingdrossel im Schnitt von der Seite gesehen,
- Fig.2-Fig.4
- jeweils eine andere bevorzugte Ausführungsform der erfindungsgemäßen Schwingdrossel in gleicher Darstellung wie in Fig. 1, und
- Fig.5
- die Schwingdrossel gemäß Fig.4 im Schnitt entlang der Schnittlinie V-V in Fig.4 von oben gesehen.
- Fig. 1
- the construction of a conventional known choke seen in section from the side,
- Fig.2-Fig.4
- in each case another preferred embodiment of the oscillating throttle according to the invention in the same representation as in Fig. 1, and
- Fig. 5
- 4 seen in section along the section line VV in Figure 4 from above.
Die Fig.1 zeigt den Aufbau einer herkömmlichen bekannten Schwingdrossel. Um eine Sättigung während des Zündvorgangs zu vermeiden, ist ein sehr großer Luftspalt 1 innerhalb der Wicklung vorgesehen, die sich auf einem Spulenkörper 2 befindet, deren vom Wickelgrund 2a umgebene Fläche A über die Länge des Luftspalts 1 einen konstanten Querschnitt aufweist. Die Größe des Querschnitts B der Fläche 1a beim Übergang der magnetischen Feldlinien von der Luft in das Ferrit des Kerns 3 ist so gewählt, daß die zulässige maximale Sättigungsinduktion des verwendeten Ferrits nicht überschritten wird.1 shows the structure of a conventional known oscillating choke. In order to avoid saturation during the ignition process, a very
Die Erfindung beruht auf der Erkenntnis, daß die am Übergang der magnetischen Feldlinien von der Luft in das Ferrit des Kerns benötigte Begrenzung der Induktion für die Luftstrecke nicht erforderlich ist, daß aus diesem Grunde, wie in Fig. 2 bis Fig.4 dargestellt, die magnetisch wirksame Fläche in der Luftstrecke stark verringert werden kann und daß sich dadurch gegenüber einer bekannten Schwingdrosssel von konstantem Querschnitt der vom Wickelgrund umschlossenen Fläche folgende Vorteile ergeben:
- 1. Eine Erhöhung der Windungszahl bei vorgegebener Drahtlänge. Hierdurch steigt die Güte erheblich, da bei gleichem ohmschen Widerstand die Induktivität stark zunimmt.
- 2. Durch den größeren Wickelraum kann der Drahtquerschnitt vergrößert werden, wodurch noch einmal die Güte verbessert wird.
- 3. Bei vorgegebener Güte kann der Kernquerschnitt verkleinert werden, da durch die beschriebene Querschnittsverringerung im Luftbereich eine größere Scherung ermöglicht wird.
- 1. An increase in the number of turns for a given wire length. This increases the quality considerably, since the inductance increases sharply with the same ohmic resistance.
- 2. Due to the larger winding space, the wire cross section can be enlarged, which improves the quality once again.
- 3. If the quality is specified, the core cross section can be reduced because the described reduction in cross-section in the air area enables greater shear.
Die Fig.2 zeigt eine Ausführungsform der erfindungsgemäßen Schwingdrossel, bei der der Kern 3' aus zwei E-Kernhälften 3a' jeweils mit gegenüber den Außenschenkeln 3b' kürzerem Mittelschenkel 3c' besteht. Die Mittelschenkel 3c' der Kernhälften 3a' ragen in einen Spulenkörper 2' hinein und lassen zwischen sich einen Luftspalt 1' frei. Die von dem Wickelgrund 2a' des Spulenkörpers 2' umschlossene Querschnittsfläche A ist im Bereich des Luftspalts 1' gegenüber der Querschnittsfläche B im Bereich des Feldlinienaustritts von der Luft in das Ferrit des Kerns 3' verkleinert, wobei die letztgenannte Querschnittsfläche B so groß ist, daß die zugehörige Induktion das Ferrit gerade noch nicht in Sättigung bringt.2 shows an embodiment of the oscillating throttle according to the invention, in which the core 3 'consists of two E-core halves 3a' each with a
Die Fig. 3 zeigt eine Ausführung der erfindungsgemäßen Schwingdrossel, bei der die Scherung so vergrößert ist, daß beim Kern 3'' völlig auf einen Mittelschenkel verzichtet werden kann. Der Ferritkern 3'' besteht nur noch aus einem Rahmen, der die Permeabilität vergrößert und die äußeren Feldlinien bündelt, wodurch eine magnetische Abschirmfunktion erreicht wird.Fig. 3 shows an embodiment of the oscillating throttle according to the invention, in which the shear is increased so that a central leg can be completely dispensed with in the
Eine Rahmenkonstruktion wie bei Fig. 3 kann gemäß Fig. 4 auch für die Realisierung einer Schwingdrossel der Art gemäß Fig. 2 verwendet werden. Die bei der Schwingdrossel nach Fig. 2 zur Erhöhung der Permeabilität vorhandenen kurzen Mittelschenkelabschnitte 3c' des Kerns 3' sind hier zusätzlich zu dem Ferritrahmen 3''' als Einzelstücke 3e''' aus Ferrit in den Spulenkörper 2''' eingelegt. Der Vorteil der Rahmenkonstruktion ist, daß das Volumen der Spule durch höhere Kern-Außenschenkel (Fig. 5) bei gleichem Querschnitt verkleinert wird, und daß eine gute magnetische Abschirmung erreicht wird.A frame construction as in FIG. 3 can also be used in accordance with FIG. 4 for the realization of an oscillating throttle of the type in FIG. 2. The short
Die Abschirmwirkung kann noch dadurch verbessert werden, daß der Ferritrahmenkern 3'', 3''' aus einem Stück besteht und somit als solcher keinen Luftspalt aufweist.The shielding effect can be further improved in that the
Für die Spannungsfestigkeit der Wicklung ist der Spulenkörper 2', 2'', 2''' zweckmäßigerweise, wie in der Zeichnung dargestellt, in Kammertechnik aufgebaut.For the dielectric strength of the winding, the coil body 2 ', 2' ', 2' '' is expediently constructed in chamber technology, as shown in the drawing.
Vorzugsweise nimmt, wie in Fig. 2 bis Fig. 4 dargestellt, die vom Spulenkörperwickelgrund umschlossene Querschnittsfläche von den Enden des Luftspalts zu dessen Mitte hin kontinuierlich ab. Besonders vorteilhaft ist es, wenn die Querschnittsabnahme dem Verlauf der Feldlinien angepaßt ist.Preferably, as shown in FIGS. 2 to 4, the cross-sectional area enclosed by the bobbin winding base continuously decreases from the ends of the air gap to the center thereof. It is particularly advantageous if the cross-sectional decrease is adapted to the course of the field lines.
Claims (6)
- Reactor coil, the ferrite core (3'; 3''; 3''') of which has an air gap (1'; 1''; 1''') in the region of the coil body (2', 2'', 2'''), in particular for the operation of high-pressure metal vapour lamps, which work with a low-frequency combustion current and the ignition voltage of which is produced at high frequency, characterised thereby that the cross-sectional area (A), which is surrounded by the winding base (2a'; 2a''; 2a''') of the coil body (2'; 2''; 2'''), in the region of the air gap (1'; 1''; 1''') is reduced in relation to the cross-sectional area (B) in the region of the flux transition from the air into the ferrite of the core (3'; 3''; 3'''), wherein the last-mentioned cross-sectional area (B) is so large that the associated induction of the ferrite is not brought directly into saturation.
- Reactor coil according to claim 1, characterised thereby that the coil body (2'; 2''; 2''') is divided into chambers.
- Reactor coil according to claim 1 or 2, characterised thereby that the core (3') is E-shaped.
- Reactor coil according to claim 1 or 2, characterised thereby that the core is U-shaped.
- Reactor coil according to claim 1 or 2, characterised thereby that the core (3''; 3''') is constructed as a frame core.
- Reactor coil according to claim 5, characterised thereby that in addition to the frame core (3''') ferrite members (3e''') are inserted into the coil body (2''').
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4007148A DE4007148A1 (en) | 1990-03-07 | 1990-03-07 | VOLUME-OPTIMIZED VIBRATION THROTTLE FOR HIGH CONTROL AND HIGH GOETE |
DE4007148 | 1990-03-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0445704A2 EP0445704A2 (en) | 1991-09-11 |
EP0445704A3 EP0445704A3 (en) | 1992-08-12 |
EP0445704B1 true EP0445704B1 (en) | 1993-11-03 |
Family
ID=6401603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91103237A Expired - Lifetime EP0445704B1 (en) | 1990-03-07 | 1991-03-04 | Reactor coil, particularly for operating high-pressure metal vapour lamps |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0445704B1 (en) |
DE (2) | DE4007148A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4010473A1 (en) * | 1990-03-31 | 1991-10-02 | Vogt Electronic Ag | THROTTLE TRANSFORMER COMBINATION FOR THE OPERATION OF METAL VAPOR HIGH PRESSURE (MHD) LAMPS FROM ON-VEHICLE NETWORKS OF VEHICLES |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE922423C (en) * | 1942-08-21 | 1955-01-17 | Aeg | Transformer or reactor with a strongly flattened current-voltage characteristic in the upper part |
FR2077445B1 (en) * | 1969-04-14 | 1973-07-13 | Ibm France | |
DE2143037A1 (en) * | 1971-08-27 | 1973-03-01 | Joseph | INDUCTIVE ELEMENT |
US4298853A (en) * | 1980-03-27 | 1981-11-03 | General Electric Company | Compact high voltage shunt reactor |
DE3129381A1 (en) * | 1981-07-25 | 1983-02-10 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | POWER SUPPLY TRANSFORMER, ESPECIALLY FOR A TELEVISION RECEIVER |
JPS5922305A (en) * | 1982-07-28 | 1984-02-04 | Toshiba Electric Equip Corp | Leakage transformer for high frequency |
JPH01140613A (en) * | 1987-11-26 | 1989-06-01 | Matsushita Electric Works Ltd | Choke coil for high frequency |
-
1990
- 1990-03-07 DE DE4007148A patent/DE4007148A1/en active Granted
-
1991
- 1991-03-04 DE DE91103237T patent/DE59100540D1/en not_active Expired - Fee Related
- 1991-03-04 EP EP91103237A patent/EP0445704B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE4007148A1 (en) | 1991-09-12 |
EP0445704A2 (en) | 1991-09-11 |
DE59100540D1 (en) | 1993-12-09 |
EP0445704A3 (en) | 1992-08-12 |
DE4007148C2 (en) | 1992-07-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE19603779C2 (en) | Choke coil | |
EP0629311B1 (en) | Coil for high-voltage transformer | |
DE10260246B4 (en) | Coil arrangement with variable inductance | |
EP1405322B1 (en) | Swinging choke | |
DE19728667A1 (en) | High voltage transformer for gas discharge lamp | |
EP2546842A2 (en) | Coil for limiting energy | |
DE3833916A1 (en) | AC POWER FILTER | |
DE4117288A1 (en) | HIGH VOLTAGE IGNITION TRANSMITTER FOR IGNITING AND OPERATING AC HIGH PRESSURE GAS DISCHARGE LAMPS IN MOTOR VEHICLES | |
EP0445704B1 (en) | Reactor coil, particularly for operating high-pressure metal vapour lamps | |
DE4227757A1 (en) | Inductance device for filter of electromagnetic device e.g. magnetron - has ferrite cores formed from multi-facet bars with air cooling channel along centre that are inserted into coils | |
EP0585597B1 (en) | High voltage line transformer for a TV receiver | |
DE2628524A1 (en) | HIGH VOLTAGE WINDING FROM SEVERAL SUB-COILS FOR VOLTAGE CONVERTER, | |
DE4311126C2 (en) | Current-compensated multiple choke in a compact design | |
EP0320018A1 (en) | Reactor coil | |
DE4208706C2 (en) | Ignition coil for an ignition system of an internal combustion engine | |
EP0740318B1 (en) | High voltage transformer for a television receiver | |
DE3900286C2 (en) | ||
EP0451628A1 (en) | Choke-coil/transformer combination for operating high pressure metal vapor lamps of vehicle electrical systems | |
EP0127119A1 (en) | Electomagnetic appliance for high-frequency power circuits, particularly a transformer or reactive coil | |
DE2203210A1 (en) | TRANSDUCER | |
DE4008424C2 (en) | ||
DE3144840A1 (en) | High-reactance autotransformer | |
DE1613568C3 (en) | Mania Ikern choke coil | |
EP0152096B1 (en) | Ballast unit for gas discharge lamps | |
DE2040681A1 (en) | Jacket core inductor for lights |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE FR GB IT |
|
17P | Request for examination filed |
Effective date: 19920229 |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE FR GB IT |
|
17Q | First examination report despatched |
Effective date: 19930326 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE FR GB IT |
|
REF | Corresponds to: |
Ref document number: 59100540 Country of ref document: DE Date of ref document: 19931209 |
|
ET | Fr: translation filed | ||
ITF | It: translation for a ep patent filed |
Owner name: BUGNION S.P.A. |
|
GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19940119 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20010227 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20010302 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20010530 Year of fee payment: 11 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020304 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021001 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020304 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20021129 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050304 |