ZA200703566B - Modulation of a PFC during DC operation - Google Patents

Modulation of a PFC during DC operation Download PDF

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Publication number
ZA200703566B
ZA200703566B ZA200703566A ZA200703566A ZA200703566B ZA 200703566 B ZA200703566 B ZA 200703566B ZA 200703566 A ZA200703566 A ZA 200703566A ZA 200703566 A ZA200703566 A ZA 200703566A ZA 200703566 B ZA200703566 B ZA 200703566B
Authority
ZA
South Africa
Prior art keywords
operating device
pfc
power factor
factor correction
correction circuit
Prior art date
Application number
ZA200703566A
Inventor
Lampert Peter
Klien Dietmar
Original Assignee
Tridonicatco Gmbh & Co Kg
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 Tridonicatco Gmbh & Co Kg filed Critical Tridonicatco Gmbh & Co Kg
Publication of ZA200703566B publication Critical patent/ZA200703566B/en

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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
    • H05B41/282—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
    • H05B41/2825—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 by means of a bridge converter in the final stage
    • H05B41/2828—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 by means of a bridge converter in the final stage using control circuits for the switching elements
    • 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
    • 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
    • H05B41/282—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Rectifiers (AREA)

Description

CeO
Modulation of a PFC in DC operation
The invention relates to methods for the operation of an operating device for illumination means, such as for example an electronic ballast (EVG) for gas discharge lamps. The operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, which is constituted for example in the form of a switching regulator (up converter) with a clocked switch.
Further, the invention relates to a computer software programme product for providing such a method, on a control component, which can provide for such a method by programming and/or hard wiring, as well as to an operating device for illumination means.
As stated, the present invention relates to operating devices for illumination means which have PFC circuits.
Such an operating device, Known from the DE 10128588
Al, is illustrated in Fig. 1. More precisely, the device illustrated in Fig. 1 is an electronic ballast (EVG). This ballast illustrated in Fig. 1 is connected on the input side to a mains supply voltage Uo via a high frequency filter 1. The output of the high frequency filter 1 is connected to a rectifier circuit 5 in the form of a full bridge rectifier. The supply alternating voltage rectified by the rectifier circuit 2 represents at the same time the input voltage U; for the smoothing circuit 3. This is formed in the present example by a smoothing capacitor Cl as well as an up converter having an inductance L1, a controllable switch in the form of a MOS field effect transistor Sl :
Selsey the modulating frequency of the power factor correction circuit (PFC) is selected such that in the output voltage of the power factor correction circuit (PFC) a non-compensated ripple arises. 4. Method according to claim 3, characterized in that, the ripple of the output voltage is compensated, for holding constant of the power of the illumination means, in a following illumination means regulation circuit. 5. Method according to claim 4, characterized in that, the illumination means regulation circuit compensates for the ripple of the delivered output voltage by variation of the working frequency of the illumination means. 6. Method according to any preceding claim, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between 50 Hz and 500 Hz, preferably 20 Hz to 130 Hz. 1. Method according to any preceding claim, characterized in that, the modulation of the power factor correction circuit (PFC) is effected by means of a timer circuit, by means of which values are read out from a look-up table. 8. Method according to claim 5, characterized in that,
AMENDED SHEET
SEEZ TNE
3 4 switching to modulation by means of timer circuit and look-up table takes place automatically as soon as the application of a DC voltage is recognized by the operating device. 9. Method according to any preceding claim, characterized in that, the power factor correction circuit (PFC) is operated in so-called limit mode. 10. Computer software programme product, characterized in that, it provides for a method according to any preceding claim when it runs on a computation device in an operating apparatus or is implemented by hard wiring. 11. Control component for an illumination means operating device, characterized in that, it is configured to provide for a method according to any of claims 1 to 7. 12. Operating device for illumination means, in particular an electronic ballast (EVG) for gas discharge lamps, wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, characterized in that, means for the detection of the application of a DC voltage at the input of the operating device are provided, and
AMENDED SHEET
J SRE SN
A - the working freguency of the power factor correction circuit is modulated upon application of a DC voltage on the input side. 13. Operating device for illumination means, in particular an electronic ballast (EVG) for gas discharge lamps, wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, which is constituted as a switching regulator with a clocked switch (S81), characterized in that, the switch-on time period (tow) and/or the switching frequency of the switch (S51) is modulated upon input side application of a DC voltage. 14. Operating device according to any of claims 10 or 11, characterized in that, means for the detection of the application of a DC voltage at the input of the operating device are provided, and the modulating frequency of the power factor correction circuit (PFC) 1s selected such that in the output voltage of the power factor correction circuit (PFC) a corresponding ripple arises. 15. Operating device according to claim 14, characterized in that, the output voltage subject to ripple is delivered to an illumination means regulation circuit, which varies the operating frequency of the illumination means for
AMENDED SHEET
? LoQui/ussel holding constant of the power of the illumination means. 16. Operating device according to any of claims 12 to 15, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between 50 Hz and 500 Hz, preferably 90 Hz to 130 Hz. 17. Operating device according to any of claims 12 to 16, characterized in that, the modulation of the power factor correction circuit (PFC) is effected by means of a timer circuit, by means of which values are read out from a look-up table. 18. Operating device according to claim 17, characterized in that, switching to modulation by means of timer circuit and look-up table takes place automatically upon application of a DC voltage. 19. Operating device according to any of claims 12 to 18, characterized in that, the power factor correction circuit (PFC) is constituted for operation in so-called limit mode.
AMENDED SHEET
(EVG) for gas discharge lamps. The operating device thereby has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take- up. The working frequency of the power factor correction circuit is modulated upon application of a
DC voltage at the input side.
The power factor correction circuit (PFC) can be constituted in the form of a switching regulator with a clocked switch. For the reduction of interference the switch can be so clocked that its switch-on period and/or its switching frequency is modulated upon the application of a DC voltage at the input side.
The modulating frequency of the power factor correction circuit (PFC) can thereby be selected such that the output voltage of the power factor correction circuit (PFC) sets an appropriate level of ripple. In other words the modulation of the PFC circuit 1s not controlled by the circuit itself nor an inter-bus regulation. Rather, the compensation of this "ripple" in the bus voltage (i.e. the intermediate circuit voltage which is provided by the power factor correction circuit and applied to the storage capacitor) is effected for holding constant of the power consumption of the illumination means by means of frequency variation of the inverter. The control unit can for this purpose detect in a manner known per se an operating parameter, such as for example the lamp current and the lamp voltage, and depending on this detection and a deviation from a desired value vary the frequency of the inverter.
/
The modulating frequency of the power factor correction circuit can be selected for example in a region between 15 Hz and 500 Hz, preferably between 90 and 130 Hz. As is known in the state of the art the modulation is linked with the zero crossings of the alternating voltage so that a modulating frequency of 100 Hz (Europe) or 120 Hz (USA) can be provided. With the invention, in contrast, the modulating frequency is freely adjustable and optimizable.
Of course, upon application of a DC voltage the modulation can no longer be triggered by zero crossings of the input voltage. In accordance with the invention it can therefore be provided that the modulation of the
PFC circuit is effected by means of a timer circuit, by means of which values are read out from a look-up table. These values are, as in the case of the state of the art, prolongation values, which are applied to the actual regulator value Ton Regulator of the control circuit. The regulator value Tox regulator is the thereby the switch-on time duration for the switch, which was calculated by a regulator for holding constant the output voltage of the PFC.
In accordance with the invention it can be switched over automatically to modulation by means of the timer circuit and the look-up table as soon as the operating device recognizes the application of a DC voltage. In principle, the automatic recognition of emergency light operation (application of a DC voltage) 1s already known from EP 490329 Bl. Reference is made to Fig. 4 there, reference signs C25 and R21.
The power factor correction circuit (PFC) can be operated in the so-called limit mode ("borderline mode") .
In accordance with the invention there is further provided a computer software programme product which provides for such a method when it runs on & computation device in an operating apparatus Or is implemented by hard wiring (ASIC).
Further, in accordance with the invention there is also provided a control component (microcontroller, ASIC etc.) for an illumination means operating device which is configured for providing for such a method.
The invention finally also proposes an operating device for illumination means.
Further features, aspects and advantages of the present invention will now be made clear with reference to the explanation of an exemplary embodiment. In the accompanying Figures there is shown:
Fig. 1 a circuit known from the state of the art (DE 101 28 588 Al), and
Fig. 2 a circuit in accordance with the invention.
It is to be understood that in accordance with the invention the circuit of Fig. 1 can be retained for the
AC operation. Fig. 2 shows cnly those components which are necessary for an operation with AC mains voltage.
Otherwise, in the two Figures, those components which g have the same reference signs correspond to one another.
To improve the interference spectrum of the circuit also in emergency operation (DC mains operation) the circuit in accordance with the invention has, as illustrated into Fig. 2, a control circuit 6 which recognizes the application of an AC or DC voltage by means of a signal 15, which reproduces the rectified input voltage U;, and a circuit 20. Thereby there can for example be employed a circuit which is in principle known from Fig. 4 of EP 490329 Al. This DC recognition circuit 20 controls a timing generator 8. This timing generator 8, so to speak, replaces the zero crossings of the mains voltage no longer available with DC voltage. The timing generator 8 therefore controls the reading out from a look-up table of the prolongation values for the switch-on time period of the switch Sl.
As is in principle known from the state of the art, in accordance with the invention, if appropriate, also the bus voltage Uz; is measured and fed back to the control unit 6 (bus voltage signal 16), in order - through variation of the switching frequency of the switch S1 - to regulate the bus voltage to desired value Uggr.
Thus, the regulation of the bus voltage yields a regulation value Ton regulator for the switch-on and switch-off period of the switch, which regulation value
Ton Regulator 10 accordance with the invention 1s acted upon with an additional value Ton noo changing periodically also in DC operation, to modulate the modulation depth and/or the switching frequency for the improvement in the interference spectrum.
This regulation of the bus voltage U; by means of detection of the bus voltage 16 and by the control system 9 is relatively slow in comparison with the modulating frequency or change of the switch-on time period ten of the switch S1 so that this modulation in the bus voltage Uz 1s not compensated and the bus voltage will have, in comparison to the switching frequency of the switch S1, a low-frequency ripple.
This ripple of the bus voltage is compensated for by the feedback of a parameter 19 reproducing the illumination means power (illumination means voltage, illumination means current, detection of the illumination power via an optical sensor or the like) as actual value and the control of the switching frequency of the inverter 4 for holding constant the illumination means power to a predetermined desired value.
In accordance with the invention the additional values
Ton asa read out from the look up table are loaded into a flash memory of the ASIC 6. These Ton asa values of the switching time prolongation block 13 are then added by the regulator 12 to the normal Ton regulator:
Ton = Ton add t* Ton regulator
Each Ton index 1s thereby set for a settable time period (a “sweep value”) and then the next index is selected from the look-up table. Through change of the sweep value the modulating frequency can be set.

Claims (25)

’ Claims:
1. Method for the operation of an operating device for illumination means wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, characterized in that, the application of a DC voltage at the input of the operating device is detected, and the working frequency of the power factor correction circuit is modulated upon application of a DC voltage on the input side.
2. Method according to claim 1, characterised in that, the method is a method for the operation of an electronic ballast (EVG) for gas discharge lamps.
3. Method for the operation of an operating device for illumination means wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, which is constituted as a switching regulator with a clocked switch, characterized in that, the application of a DC voltage at the input of the operating device is detected, and the switch-on time period (to) and/or the switching frequency of the switch is modulated upon input side application of a DC voltage.
4. Method according to claim 3, characterised in that, the method is a method for the operation of an electronic ballast (EVG) for gas discharge lamps.
5. Method according to any preceding claim, characterized in that, the modulating frequency of the Amended sheet 08/04/2008
& power factor correction circuit (PFC) is selected such that in the output voltage of the power factor correction circuit (PFC) a non-compensated ripple arises.
6. Method according to claim 5, characterized in that, the ripple of the output voltage is compensated, for holding constant of the power of the illumination means, in a following illumination means regulation circuit.
7. Method according to claim 6, characterized in that, the illumination means regulation circuit compensates for the ripple of the delivered output voltage by variation of the working frequency of the illumination means.
8. Method according to any preceding claim, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between 50 Hz and 500 Hz.
9. Method according to claim 8, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between S90 Hz to 130 Hz.
10. Method according to any preceding claim, characterized in that, the modulation of the power factor correction circuit (PFC) is effected by means of a timer circuit, by means of which values are read out from a look-up table.
11. Method according to claim 7, characterized in Amended sheet 08/04/2008
» that, switching to modulation by means of timer circuit and look-up table takes place automatically as soon as the application of a DC voltage is recognized by the operating device.
12. Method according to any preceding claim, characterized in that the power factor correction circuit (PFC) is operated in so-called limit mode.
13. Computer software programme product, characterized in that, it provides for a method according to any preceding claim when it runs on a computation device in an operating apparatus or is implemented by hard wiring.
14. Control component for an illumination means operating device, characterized in that, it is configured to provide for a method according to any of claims 1 to 10.
15. Operating device for illumination means wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, characterized in that, means for the detection of the application of a DC voltage at the input of the operating device are provided, and the working frequency of the power factor correction circuit is modulated upon application of a DC voltage on the input side.
16. Operating device according to claim 15, characterised in that, the operating device is an electronic ballast (EVG) for gas discharge lamps. Amended sheet 08/04/2008
+
17. Operating device for illumination means wherein the operating device has a power factor correction circuit (PFC) for the reduction of harmonics at the input current take-up, which is constituted as a switching regulator with a clocked switch, characterized in that, the switch-on time period (tox) and/or the switching frequency of the switch is modulated upon input side application of a DC voltage.
18. Operating device according to claim 17, characterized in that, the operating device is an electronic ballast (EVG) for gas discharge lamps.
19. Operating device according to any of claims 15 to 18, characterized in that, means for the detection of the application of a DC voltage at the input of the operating device are provided, and the modulating frequency of the power factor correction circuit (PFC) is selected such that in the output voltage of the power factor correction circuit (PFC) a corresponding ripple arises.
20. Operating device according to claim 19, characterized in that, the output voltage subject to ripple is delivered to an illumination means regulation circuit, which varies the operating frequency of the illumination means for holding constant of the power of the illumination means.
21. Operating device according to any of claims 15 to 20, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between 50 Hz and 500 Hz. Amended sheet 08/04/2008
22. Operating device according to claim 21, characterized in that, the modulating frequency of the power factor correction circuit (PFC) is chosen in a region between 90 Hz to 130 Hz.
23. Operating device according to any of claims 15 to 21, characterized in that, the modulation of the power factor correction circuit (PFC) is effected by means of a timer circuit, by means of which values are read out from a look-up table.
24. Operating device according to claim 23, characterized in that, switching to modulation by means of timer circuit and look-up table takes place automatically upon application of a DC voltage.
25. Operating device according to any of claims 15 to 24, characterized in that, the power factor correction circuit (PFC) is constituted for operation in so- called limit mode. Amended sheet 08/04/2008
ZA200703566A 2004-10-20 2005-10-05 Modulation of a PFC during DC operation ZA200703566B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004051162.4A DE102004051162B4 (en) 2004-10-20 2004-10-20 Modulation of a PFC in DC mode

Publications (1)

Publication Number Publication Date
ZA200703566B true ZA200703566B (en) 2008-07-30

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Application Number Title Priority Date Filing Date
ZA200703566A ZA200703566B (en) 2004-10-20 2005-10-05 Modulation of a PFC during DC operation

Country Status (6)

Country Link
EP (1) EP1803336B1 (en)
CN (1) CN101044798B (en)
AU (1) AU2005297572B2 (en)
DE (1) DE102004051162B4 (en)
WO (1) WO2006042640A2 (en)
ZA (1) ZA200703566B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027029A1 (en) * 2008-06-06 2009-12-10 Tridonicatco Gmbh & Co. Kg Lamp type detection by power factor correction circuit
DE102010039154A1 (en) 2010-08-10 2012-02-16 Tridonic Gmbh & Co. Kg Modulation of a PFC in DC mode
GB201107174D0 (en) 2011-04-28 2011-06-15 Tridonic Gmbh & Co Kg Power factor correction
DE102012203745A1 (en) 2011-12-23 2013-06-27 Tridonic Gmbh & Co. Kg Method and circuit arrangement for the operation of lamps
EP2939501B1 (en) * 2012-12-28 2019-06-12 Tridonic GmbH & Co KG Operation of lighting means by means of a resonant converter
DE102013107872B3 (en) * 2013-08-07 2014-12-11 Vossloh-Schwabe Deutschland Gmbh Device and method for operating a lamp arrangement
DE102013223096A1 (en) * 2013-11-13 2015-05-13 Tridonic Gmbh & Co Kg Power factor correction circuit, lighting device and method of controlling a power factor correction circuit

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US5099176A (en) 1990-04-06 1992-03-24 North American Philips Corporation Fluorescent lamp ballast operable from two different power supplies
DE4039161C2 (en) 1990-12-07 2001-05-31 Zumtobel Ag Dornbirn System for controlling the brightness and operating behavior of fluorescent lamps
US5623187A (en) 1994-12-28 1997-04-22 Philips Electronics North America Corporation Controller for a gas discharge lamp with variable inverter frequency and with lamp power and bus voltage control
CN2317595Y (en) * 1997-11-24 1999-05-05 陈倜 Electronic ballast controlled by one-chip computer
EP1066739B1 (en) 1997-12-23 2002-02-27 Tridonic Bauelemente GmbH Method and device for detecting the rectification effect occurring in a gas-discharge lamp
JP2001028879A (en) 1999-07-13 2001-01-30 Mitsubishi Electric Corp Control apparatus for supply power
US6337544B1 (en) * 1999-12-14 2002-01-08 Philips Electronics North America Corporation Digital lamp signal processor
ATE286347T1 (en) * 2000-09-15 2005-01-15 Tridonicatco Gmbh & Co Kg ELECTRONIC BALLAST WITH DC-LINK CONTROL
DE10120497B4 (en) 2000-09-15 2015-10-15 Tridonic Gmbh & Co Kg Electronic ballast
US6906503B2 (en) 2002-01-25 2005-06-14 Precor Incorporated Power supply controller for exercise equipment drive motor
EP1736037A4 (en) * 2004-04-08 2009-03-04 Int Rectifier Corp Pfc and ballast control ic

Also Published As

Publication number Publication date
EP1803336B1 (en) 2014-08-06
AU2005297572B2 (en) 2012-03-15
WO2006042640A3 (en) 2006-08-03
CN101044798A (en) 2007-09-26
EP1803336A2 (en) 2007-07-04
AU2005297572A1 (en) 2006-04-27
DE102004051162B4 (en) 2019-07-18
WO2006042640A2 (en) 2006-04-27
CN101044798B (en) 2014-06-18
DE102004051162A1 (en) 2006-04-27

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