EP0749269A2 - Oberwellenfilter für ein elektronisches Vorschaltgerät - Google Patents
Oberwellenfilter für ein elektronisches Vorschaltgerät Download PDFInfo
- Publication number
- EP0749269A2 EP0749269A2 EP96660026A EP96660026A EP0749269A2 EP 0749269 A2 EP0749269 A2 EP 0749269A2 EP 96660026 A EP96660026 A EP 96660026A EP 96660026 A EP96660026 A EP 96660026A EP 0749269 A2 EP0749269 A2 EP 0749269A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- suppressor
- set forth
- switch element
- coil
- rectifier
- 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.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 208000032365 Electromagnetic interference Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
Definitions
- the present invention relates to a circuit arrangement for use in an electronic ballast included in a discharge lamp for suppressing harmonics included in a current picked up by an appliance from the mains and other electromagnetic interferences generated by the appliance.
- V1 is a diode bridge for rectifying a mains voltage supplied to mains terminals X1-X2.
- V2 is an electronic switch component, for example a MOSFET-transistor controlled by a circuit block A1. With V2 conducting, energy is charged in a coil L1. With switch V2 opening, the energy of coil L1 transfers by way of a diode V3 to a charging capacitor C1.
- the control of switch V2 can be effected in such a manner that the current progressing in terminals X1-X2 is for the most part sinoidal.
- Circuit designs based on this principle have been disclosed e.g. in application instruction AN-995 published by International Rectifier ("Electronic Ballasts Using the Cost-Saving IR2155 Driver", International Rectifier, 233 Kansas Street, El Segundo, CA 90245) as well as in Patent publication US 5,001,400.
- One further evolution is disclosed in Patent application FI 945473.
- Commercially available are integrated circuits intended for handling the functions of block A1 in fig. 1.
- boost-type chopper filters can be broken down to the following modes:
- the current of permanent-frequency filters included in category 1 does not have very good distortion values and a useful result is obtained by supplementing the control with various correcting waveforms. This, of course, makes the configuration more complicated.
- the alternating-frequency configurations included in category 1 have a small current distortion but those require detection of the breaking of a coil current.
- the current regulation can be implemented in a variety of ways and, as far as the current distortion is concerned, the final result depends on the implementation.
- hysteresis regulation wherein the chopper switch is controlled by sinusoidally varying the rating of a maximum and minimum current
- the regulation requires the use of a coil-current measuring and a repeater circuit for achieving a small distortion, i.e. once again a small current distortion requires a complicated circuit configuration.
- the waveform of a mains current is not controlled in the proximity of the zero points of a supply current, either.
- all circuit designs are not adaptable in the regulable ballasts of discharge lamps, wherein the dimming of a lamp is desired.
- An object of this invention is to eliminate the above drawbacks and to achieve a very small current distortion and a high power factor for an appliance by means of a simple circuit design.
- the invention is based on the controlled switching of a chopper operating mode between a continuous and discontinuous operating mode according to the operating position of the chopper.
- a circuit of the invention is characterized by what is set forth in the characterizing clause of claim 1 - 9.
- circuit of the invention One benefit gained by a circuit of the invention is the achievement of a very small current distortion and high power factor by means of a simple circuit configuration.
- this circuit is adaptable in regulable ballasts, wherein it is desirable to adjust a lamp-produced light output to a level determined by an external control signal.
- ballast comprises a substantially constant-power load.
- a control block A1 for power switches can be a separate control circuit or more preferably an oscillator included in the ballast section A2 anyway.
- a diode bridge V1 serves as a full-wave rectifier.
- the circuit has a two-stage operation. In the first stage, a switch V2 is conducting and, thus, the current induced by a supply voltage increases in a coil L1 in proportion to the strength of supply current.
- the passage of current in the first operating stage is depicted in fig. 2, in which the darkened solid line represents a current path.
- the transistor V2 When the transistor V2 is opened in stage 2, the energy tied up in the coil L1 forces the current to continue in the coil. Now, it has no other route but to flow by way of a diode V3 to a charging capacitor C1 for charging the same and this condition is depicted in fig. 3 with a darkened line.
- the amount of energy tied up in the coil during a single cycle is dependent on the strength of the supply voltage and the switch-on period of V2.
- the above-described circuit is controlled such that the operating mode of a chopper is switched at a certain point of operation.
- the permanent frequency is the same as the frequency of a lamp circuit included in the block A2 of figs. 1-3.
- the chopper of the invention operates at a permanent 50 % pulse ratio. When the mains voltage is near its peak value, the pulse ratio is in turn adjusted lower in the control block A1.
- the regulating parameters include the maximum current of a chopper switch V2 and the output voltage of a chopper. Operation of the regulating circuit is quite simple: the value of a current limit is adjusted by means of a feedback received from the output voltage.
- the chopper coil is dimensioned such that the energy charged in the coil L1 during a permanent pulse ratio discharges entirely to the charging capacitor C1, i.e. the question is about a discontinuous coil-current operating mode. In proximity of the voltage peak value, the energy of coil L1 does not have enough time to discharge completely to the charging capacitor C1, i.e. the question is thus about a continuous coil-current operating mode.
- the current picked up from the mains can be made quite accurately sinusoidal (total harmonic distortion less than 7 % and circuit power factor 0,98).
- the selection of an operating-mode switching point is affected by the magnitude of a load, the ratio between an output voltage and supply voltage, the operating frequency and the inductance of a coil.
- the described operating mode is illustrated in a string of drawing figures 4-11, in which
- the simplicity of a solution of the invention is due to the fact that the coil does not require additional winding for the detection of a current interruption, the regulating circuit does not require a repeater stage and the adjustment of current limit does not require a sinusoidal or any other type of correction affecting the waveform.
- the design is highly preferable also in terms of implementing costs.
- a circuit of the invention is useful also in such regulable ballasts of discharge lamps, wherein the lamp intensity is adjusted lower by increasing the supply frequency.
- the nominal effect of a chopper also decreases and the distortion values remain good.
- a circuit system of the invention can be supplemented by connecting an inductive circuit element between the mains-supply terminal X1 and the rectifier V1, a capacitive circuit element between the terminals X1 and X2 or a capacitive circuit element across the positive and negative terminal of the rectifier V1.
- An object of these circuit elements is to suppress radio-frequency electromagnetic disturbances.
- a circuit arrangement of the invention is particularly useful in electronic ballasts included in low-pressure discharge lamps with basic designs prior known e.g. from Patent FI 65,524.
- the invention is not limited to just the above-described application but it is just as well applicable in the electronic ballasts of high-pressure lamps and in other ballasts operating on the chopper principle.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI952974 | 1995-06-16 | ||
FI952974A FI97437C (fi) | 1995-06-16 | 1995-06-16 | Elektronisen liitäntälaitteen häiriönsuodatin |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0749269A2 true EP0749269A2 (de) | 1996-12-18 |
EP0749269A3 EP0749269A3 (de) | 1998-04-01 |
EP0749269B1 EP0749269B1 (de) | 2000-12-20 |
Family
ID=8543621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19960660026 Expired - Lifetime EP0749269B1 (de) | 1995-06-16 | 1996-06-07 | Oberwellenfilter für ein elektronisches Vorschaltgerät |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0749269B1 (de) |
DE (1) | DE69611266T2 (de) |
FI (1) | FI97437C (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0431778A1 (de) * | 1989-11-20 | 1991-06-12 | General Electric Company | Wechselstrom-Gleichstrom-Leistungsumwandlungsschaltung mit niedriger harmonischer Verzerrung |
US5146398A (en) * | 1991-08-20 | 1992-09-08 | Led Corporation N.V. | Power factor correction device provided with a frequency and amplitude modulated boost converter |
EP0585077A1 (de) * | 1992-08-25 | 1994-03-02 | General Electric Company | Leistungversorgung mit Verbesserung des Leistungsfaktors |
-
1995
- 1995-06-16 FI FI952974A patent/FI97437C/fi active
-
1996
- 1996-06-07 DE DE1996611266 patent/DE69611266T2/de not_active Expired - Fee Related
- 1996-06-07 EP EP19960660026 patent/EP0749269B1/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0431778A1 (de) * | 1989-11-20 | 1991-06-12 | General Electric Company | Wechselstrom-Gleichstrom-Leistungsumwandlungsschaltung mit niedriger harmonischer Verzerrung |
US5146398A (en) * | 1991-08-20 | 1992-09-08 | Led Corporation N.V. | Power factor correction device provided with a frequency and amplitude modulated boost converter |
EP0585077A1 (de) * | 1992-08-25 | 1994-03-02 | General Electric Company | Leistungversorgung mit Verbesserung des Leistungsfaktors |
Non-Patent Citations (2)
Title |
---|
MAKSIMOVIC D: "DESIGN OF THE CLAMPED-CURRENT HIGH-POWER-FACTOR BOOST RECTIFIER" PROCEEDINGS OF THE ANNUAL APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC), ORLANDO, FEB. 13 - 17, 1994, vol. 2, 13 February 1994, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 584-590, XP000467368 * |
OISHI H ET AL: "SINGLE-PHASE SWITCH-MODE RECTIFIER EMPLOYING VOLTAGE-REVERSAL CIRCUIT SWITCHED WITH A FIXED FREQUENCY" I.E.E. PROCEEDINGS: ELECTRIC POWER APPLICATIONS, vol. 142, no. 2, 1 March 1995, STEVENAGE,GB, pages 154-160, XP000513657 * |
Also Published As
Publication number | Publication date |
---|---|
EP0749269A3 (de) | 1998-04-01 |
FI97437B (fi) | 1996-08-30 |
FI97437C (fi) | 1996-12-10 |
EP0749269B1 (de) | 2000-12-20 |
FI952974A0 (fi) | 1995-06-16 |
DE69611266D1 (de) | 2001-01-25 |
DE69611266T2 (de) | 2001-04-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0763312B1 (de) | Schaltungsanordnung | |
EP0763311B1 (de) | Vorschaltgerät für eine entladungslampe | |
CA2406591C (en) | Method and apparatus for modulating hid ballast operating frequency using dc bus ripple voltage | |
CA2607554C (en) | Electronic ballast having a flyback cat-ear power supply | |
US7078870B2 (en) | Simplified topology for HID lamps | |
JPH10500803A (ja) | 電球点灯用スイッチング電源 | |
US5371439A (en) | Electronic ballast with lamp power regulation and brownout accommodation | |
JPH04255700A (ja) | 放電ランプ作動用回路 | |
CA1215739A (en) | Fluorescent light controller | |
EP0749269B1 (de) | Oberwellenfilter für ein elektronisches Vorschaltgerät | |
Tadesse et al. | A comparison of power circuit topologies and control techniques for a high frequency ballast | |
Tomm et al. | HID lamp electronic ballast based on chopper converters | |
KR100615745B1 (ko) | 파 형성 회로 | |
EP0599405A1 (de) | Verschaltgerät mit niedrigem Oberwellengehalt für eine Entladungslampe | |
US6005353A (en) | Commutator for a discharge lamp having mutually coupled inductors | |
US5698950A (en) | Suppressor for an electronic ballast in a discharge lamp | |
KR100614978B1 (ko) | 고압방전 램프용 구동회로 | |
KR100500268B1 (ko) | 조명기기용 마그네트론 구동장치 | |
US6236169B1 (en) | Supply circuit for a fluorescent tube installation | |
KR20240136753A (ko) | 고압방전 램프용 구동회로 | |
EP0724823A1 (de) | Schaltungsanordnung | |
EP0824300B1 (de) | Wechselrichter zum Speisen von Entladungslampen mit Vorrichtung zur Verbesserung des Leistungsfaktors | |
KR200253226Y1 (ko) | 고압방전 램프용 구동회로 | |
JPH05130782A (ja) | 放電灯点灯装置 | |
KR20100112097A (ko) | 적어도 2개의 상이한 타입의 방전램프를 작동시키기 위한 전자 밸러스트 |
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 NL |
|
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 NL |
|
17P | Request for examination filed |
Effective date: 19981001 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HELVAR OY AB |
|
RTI1 | Title (correction) |
Free format text: HARMONIC SUPPRESSOR FOR AN ELECTRONIC BALLAST |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
RTI1 | Title (correction) |
Free format text: HARMONIC SUPPRESSOR FOR AN ELECTRONIC BALLAST |
|
RTI1 | Title (correction) |
Free format text: HARMONIC SUPPRESSOR FOR AN ELECTRONIC BALLAST |
|
RTI1 | Title (correction) |
Free format text: HARMONIC SUPPRESSOR FOR AN ELECTRONIC BALLAST |
|
17Q | First examination report despatched |
Effective date: 20000307 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
RIC1 | Information provided on ipc code assigned before grant |
Free format text: 7H 05B 41/288 A |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
ITF | It: translation for a ep patent filed | ||
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 NL |
|
REF | Corresponds to: |
Ref document number: 69611266 Country of ref document: DE Date of ref document: 20010125 |
|
ET | Fr: translation filed | ||
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 | ||
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20020513 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20020520 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20020522 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20020523 Year of fee payment: 7 |
|
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: 20030607 |
|
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 NON-PAYMENT OF DUE FEES Effective date: 20040101 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040101 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20030607 |
|
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: 20040227 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20040101 |
|
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 Effective date: 20050607 |