EP0066754B1 - Electronic mains connection device for a gas-discharge lamp - Google Patents

Electronic mains connection device for a gas-discharge lamp Download PDF

Info

Publication number
EP0066754B1
EP0066754B1 EP19820104449 EP82104449A EP0066754B1 EP 0066754 B1 EP0066754 B1 EP 0066754B1 EP 19820104449 EP19820104449 EP 19820104449 EP 82104449 A EP82104449 A EP 82104449A EP 0066754 B1 EP0066754 B1 EP 0066754B1
Authority
EP
European Patent Office
Prior art keywords
lamp
connection device
current
mains connection
set forth
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
Application number
EP19820104449
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0066754A1 (en
Inventor
Martti Sairanen
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.)
Helvar Oy AB
Original Assignee
Helvar Oy AB
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 Helvar Oy AB filed Critical Helvar Oy AB
Publication of EP0066754A1 publication Critical patent/EP0066754A1/en
Application granted granted Critical
Publication of EP0066754B1 publication Critical patent/EP0066754B1/en
Expired legal-status Critical Current

Links

Images

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
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/288—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2921—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2926—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against internal abnormal circuit conditions

Definitions

  • the present invention relates to an electronic mains connection device for a gas-discharge lamp, acting as a stabilizing current limiting element and comprising an inverter circuit which from rectified mains current or some other direct current converts the service current for a lamp to such a high frequency that the impedance of a discharge lamp is like normal resistance.
  • the invention relates to an inverter circuit embodied by means of semi-conductors and applied in a mains connection device of gas-discharge lamps for feeding current to the lamp.
  • gas-discharge lamps refers to lamps generally used for lighting and whose internal impedance in normal alternating current service of 50 or 60 Hz is characteristically negative resistance and which thus require a gas-discharge stabilizing current limiting element.
  • Such lamps comprise fluorescence lamps, low-pressure and high-pressure sodium lamps, mercury vapour lamps and halogen lamps.
  • the advantages gained include improved light efficiency due to increased service frequency, reduction of the mechanical size of necessary electromagnetic components and thereby reduction of the connection device's own power loss as well as reduction of the weight of a connection device.
  • An obvious advantage is also that it is generally easy to combine the control of a lamp's illumination level with an electronically effected connection device solution.
  • the prior art embodiments of an electronic connection device generally include some lamp current limiting impedance; a choke, a capacitor, a resistor or a combination thereof connected in series with a lamp and a source of supply voltage (DE-A-2 550 550).
  • a lamp is directly coupled in series with a switching element (e.g a transistor) to a DC supply voltage.
  • An inductance is parallel- coupled with the lamp.
  • US ⁇ A ⁇ 3999100 gives an example of an inverter circuit for a metal halide lamp which does not include a limiting impedance.
  • the switching frequency is however the mains frequency and current limiting is achieved by a feed-back circuit which senses the lamp current and regulates the voltage across the inverter switches accordingly.
  • the present invention is also based on a circuit solution capable of operating discharge lamps at the above-mentioned relatively high frequencies on which a discharge lamp behaves as normal resistance.
  • a circuit solution according to the invention differs from the prior art solutions in that it does not require any inductive or capacitive member for the stabilization of a lamp's gas-discharge.
  • a discharge lamp can be operated by connecting it by means of inverter switches directly to a source of supply voltage by reversing the polarity of a lamp on each half-cycle.
  • the switching frequency must then be so high that a discharge lamp behaves as a resistance.
  • a gas-discharge lamp 1 is connected to a source of DC voltage by way of four electronic switches 3-6 in a manner that these switches make up an inverter circuit by means of which the polarity of supply voltage at the terminals of lamp 1 is reversed at a high frequency which is within the range of circa 1 kHz ... 150 kHz.
  • This reversal of polarity is effected in a manner that, with switches 3 and 4 closed, switches 5 and 6 are open and when the latter switches are closed, the former switches are opened.
  • the circuit solution of a connection device of the invention is not provided with any current limiting impedance element but, instead, the current is limited by means of the lamp's 1 own resistance-like impedance at said high inverting frequency.
  • the invention provides a feed-back control, wherein a current transformer 7 or some other current measuring means, such as a resistor, is used to sense the current of lamp 1 and, on the basis of this current rate, a control unit 8 controls the open times and/or operating frequency of the inverter circuit switches 3-6 in a manner that the current of lamp 1 remains constant.
  • a lamp 1 is connected to an inverter circuit and to a source of DC voltage by means of an auto-transformer 9 which increases the supply voltage of lamp 1 with respect to the voltage of the voltage supply.
  • This transformer 9 can be further used for glowing the cathodes of lamp 1 to improve the ignitability of the lamp.
  • the transformer 9 can serve to create an ignition voltage peak sufficient for the ignition of lamp 1.
  • Fig. 3 differs from that of Fig. 1 in that switches 6 and 4 are replaced by capacitors 10 in order to simplify the circuit. This is a suitable approach in the applications in which the temperature limitation set by the capacitors is of no significance.
  • switches 3 and 6 of the circuit solution shown in Fig. 1 are replaced by an auto-transformer 11, one of the terminals of the voltage supply being connected to its central tap.
  • the magnetic inductance of this transformer 11 can be conventionally employed for creating an ignition voltage peak for lamp 1.
  • a resistor 16 is used for measuring a current passing through the lamp in the other direction which measuring method, as for the operation of the device,. replaces the measuring effected in other embodiments by means of a current transformer.
  • Fig. 5 illustrates a further developed embodiment corresponding to Fig. 3, comprising parallel to a lamp 1 an ignition voltage peak creating inductance 13 and parallel to that an overvoltage protector 14.
  • a current transformer 7 senses a current passing through lamp 1, said current rate being passed through a rectifying circuit 15 to a control unit 8.
  • a control unit 8 issues control pulses for the control electrodes of transistors serving as switches 3 and 5, the duration and/or operating frequency of said control pulses changing as necessary for maintaining the current passing through lamp 1 constant.
  • said contol unit 8 is provided with a regulator 12 capable of having effect on the opening times of switch transistors 3 and 5 or on their inverting frequency.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
EP19820104449 1981-06-08 1982-05-21 Electronic mains connection device for a gas-discharge lamp Expired EP0066754B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI811774A FI63314C (fi) 1981-06-08 1981-06-08 Elektroniskt foerkopplingsdon foer gasurladdningslampa
FI811774 1981-06-08

Publications (2)

Publication Number Publication Date
EP0066754A1 EP0066754A1 (en) 1982-12-15
EP0066754B1 true EP0066754B1 (en) 1986-01-02

Family

ID=8514479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820104449 Expired EP0066754B1 (en) 1981-06-08 1982-05-21 Electronic mains connection device for a gas-discharge lamp

Country Status (6)

Country Link
EP (1) EP0066754B1 (pt)
JP (1) JPS581997A (pt)
AU (1) AU560792B2 (pt)
BR (1) BR8203443A (pt)
DE (1) DE3268249D1 (pt)
FI (1) FI63314C (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807719A1 (de) * 1987-03-17 1988-09-29 Gen Electric Betriebsschaltung fuer eine gasentladungslampe

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8205026A (nl) * 1982-12-29 1984-07-16 Philips Nv Inrichting voorzien van een met tenminste twee inwendige elektroden uitgeruste metaaldampontladingsbuis.
FR2614748A1 (fr) * 1987-04-29 1988-11-04 Omega Electronics Sa Dispositif d'alimentation d'une lampe a decharge
US4935673A (en) * 1987-07-08 1990-06-19 Led Corporation Variable impedance electronic ballast for a gas discharge device
US4904907A (en) * 1988-02-26 1990-02-27 General Electric Company Ballast circuit for metal halide lamp
US4885671A (en) * 1988-03-24 1989-12-05 General Electric Company Pulse-by-pulse current mode controlled power supply
US4928038A (en) * 1988-09-26 1990-05-22 General Electric Company Power control circuit for discharge lamp and method of operating same
JPH04144097A (ja) * 1990-10-05 1992-05-18 Nissan Motor Co Ltd 放電灯の制御装置
IT1250807B (it) * 1991-07-12 1995-04-21 Marelli Autronica Circuito auto-oscillante per il comando di una lampada a scarica di gas, particolarmente per l'impiego a bordo di un autoveicolo.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629648A (en) 1969-07-31 1971-12-21 Brent W Brown Transistorized fluorescent tube operating circuit
BE794165A (fr) 1972-01-19 1973-07-17 Philips Nv Dispositif muni d'une lampe a decharge dans le gaz et/ou dans la vapeur
US3999100A (en) * 1975-05-19 1976-12-21 Morton B. Leskin Lamp power supply using a switching regulator and commutator
US4168453A (en) 1977-12-28 1979-09-18 Datapower, Inc. Variable intensity control apparatus for operating a gas discharge lamp
DE2909605A1 (de) * 1979-03-12 1980-09-25 Patra Patent Treuhand Vorschaltanordnung zum betreiben einer entladungslampe
JPS55148393A (en) * 1979-05-08 1980-11-18 Aaru Suteibunzu Kaariru Power supply for gas discharge lamp
JPS5636891A (en) * 1979-08-31 1981-04-10 Matsushita Electric Works Ltd Device for firing discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807719A1 (de) * 1987-03-17 1988-09-29 Gen Electric Betriebsschaltung fuer eine gasentladungslampe

Also Published As

Publication number Publication date
JPS581997A (ja) 1983-01-07
AU8462182A (en) 1982-12-16
DE3268249D1 (de) 1986-02-13
AU560792B2 (en) 1987-04-16
EP0066754A1 (en) 1982-12-15
FI63314C (fi) 1983-05-10
FI63314B (fi) 1983-01-31
BR8203443A (pt) 1983-06-07
FI811774A0 (fi) 1981-06-08

Similar Documents

Publication Publication Date Title
US4719390A (en) Electronic mains connection device for a gas discharge lamp
US5751120A (en) DC operated electronic ballast for fluorescent light
US7019468B2 (en) Electronic ballast with ignition and operation control
EP0427709A2 (en) Power control circuit
FI73114B (fi) Kopplingsanordning foer att driva laogtrycksurladdningslampor, vilken anordning har en reglerbar ljusstroem.
US3619716A (en) High-frequency fluorescent tube lighting circuit and ac driving circuit therefor
KR870002745A (ko) 고주파 개스방전램프 디밍 밸러스트
JPH11509966A (ja) 調光可能な安定器
JPH0317197B2 (pt)
KR20000016491A (ko) 안정기
KR20000016492A (ko) 형광 램프 안정기 드라이버를 위한 플리커 방지 설계
US5036255A (en) Balancing and shunt magnetics for gaseous discharge lamps
JPH07245189A (ja) 低圧放電ランプの作動回路装置
EP0066754B1 (en) Electronic mains connection device for a gas-discharge lamp
US6577075B2 (en) High intensity discharge lamp magnetic/electronic ballast
US5422547A (en) Fluorescent lamp control circuit with dimmer
US4492897A (en) Means for limiting and controlling the current of a discharge lamp
JP2000348884A (ja) 電極高圧放電ランプを始動および作動する方法および回路装置
US4266165A (en) High intensity discharge lamp starting circuit
US4117377A (en) Circuits for starting and operating ionized gas lamps
JPS5861597A (ja) 放電灯用電子式安定器
CA1204814A (en) Modular lighting control with circulating inductor
US3781597A (en) Lighting device for a discharge lamp
Mascarenhas Applications of electronic circuits in lighting
US5808421A (en) Ballast circuit having dual voltage source and emergency battery

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

Designated state(s): DE FR GB NL SE

17P Request for examination filed

Effective date: 19830125

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB NL SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3268249

Country of ref document: DE

Date of ref document: 19860213

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
EAL Se: european patent in force in sweden

Ref document number: 82104449.2

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20010411

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20010419

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20010420

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20010423

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20010424

Year of fee payment: 20

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 EXPIRATION OF PROTECTION

Effective date: 20020520

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20020521

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Effective date: 20020520

NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20020521

EUG Se: european patent has lapsed

Ref document number: 82104449.2