WO2006114175A2 - Parameterizable digital pfc (power factor correlation) - Google Patents
Parameterizable digital pfc (power factor correlation) Download PDFInfo
- Publication number
- WO2006114175A2 WO2006114175A2 PCT/EP2006/002791 EP2006002791W WO2006114175A2 WO 2006114175 A2 WO2006114175 A2 WO 2006114175A2 EP 2006002791 W EP2006002791 W EP 2006002791W WO 2006114175 A2 WO2006114175 A2 WO 2006114175A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- link
- controller
- voltage
- lamp
- ballast
- Prior art date
Links
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
-
- 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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
Definitions
- the present invention relates to control gear for lamps, in particular to an electronic ballast for at least one gas discharge lamp, in particular a fluorescent lamp.
- High frequency filter which is connected to a rectifier circuit.
- the supply voltage directed by the rectifier circuit is supplied to a smoothing circuit for generating an intermediate circuit voltage (bus voltage).
- An inverter fed with the intermediate circuit voltage finally generates a high-frequency alternating voltage, which is applied to the load circuit with the gas discharge lamp arranged therein.
- the operation with the high-frequency AC voltage among other things, an increase in the luminous efficiency of the lamp result.
- By changing the operating frequency is also given the opportunity to operate the lamp in different levels of brightness (dimming).
- the invention relates in particular to electronic ballasts with a smoothing circuit (English: Power Factor Correction, PFC), which the the Inverter supplied DC link voltage
- DC link voltage regulated to a predetermined setpoint which is done by a arranged within the smoothing circuit control circuit. This compares the current value of the intermediate circuit voltage as an actual value with an internally specified value and accordingly controls the energy consumption of the ballast and thus the value of the intermediate circuit voltage.
- a control of the energy consumption is usually carried out with the aid of a controllable switching element.
- this smoothing circuit switching element can result in harmonics which "re-radiate" into the connected power supply, which means that the voltage and current at the input of the ballast diverge in phase and distortion occurs which results in the generation of harmonics generated by the ballast
- harmonics in the network can have a disruptive effect
- standards usually require that during normal operation of the gas discharge lamp the harmonics generated by an electronic ballast only "re-radiate” below a certain level into the network.
- the smoothing circuit should therefore be designed so that a divergence of the voltage and the current in terms of their phase is avoided as possible.
- EP 1189490 A1 The starting point of EP 1189490 A1 is accordingly an electronic ballast which is operated with constant supply voltage and constant power. So there is a non-dimmable electronic ballast.
- the present invention has now set itself the task of extending the flexibility of the smoothing circuit (PFC) such that it is particularly fair in terms of requirements for a dimmable electronic ballast.
- PFC smoothing circuit
- an electronic ballast for at least one gas discharge lamp, in particular a fluorescent lamp.
- the ballast is supplied with an input voltage and has a smoothing circuit controlled by an intermediate circuit voltage regulator for generating a regulated DC link voltage and an inverter stored with the DC link voltage. At least one lamp can be connected to the inverter.
- the ballast external commands such as dimming, can be supplied.
- the DC link controller has properties that depend on the applied commands.
- the properties of the DC link regulator are also possibly changed within the same operating state (preheating, ignition, normal operation), in particular when an external dimming value specification changes.
- the external commands are to be distinguished in this respect from the "internal" operating states, which according to EP 1 189 490 A1 cause different characteristics of the smoothing circuit.
- a controller can be assigned to the DC link controller, to which the external commands can be supplied and which transmits to the DC link controller dependent setpoints with respect to the dynamic characteristics or other properties of the DC link regulation.
- setpoints are, for example, values with regard to the DC link voltage, the time constants of the DC link controller and the permissible harmonics (THD).
- a bidirectional communication can take place between the controller and the DC link controller in which the DC link controller transmits to the controller operating parameters of the smoothing circuit. These operating parameters can be, for example, the type and / or the level of the applied input voltage and / or the intermediate circuit voltage.
- the controller can be software controlled.
- the controller may be connected to a memory in which a look-up table (LUT) is stored, the defined external commands, for example
- the controller can also determine the setpoint values for the DC link control, depending on the external commands, via implemented functions.
- the characteristics of the DC link regulator may also be adjustable depending on the type and / or the level of the input voltage of the electronic ballast.
- an electronic ballast (EVG) is provided, in which the DC link controller receives set values for the operation of the smoothing circuit from a software-controlled controller.
- EMG electronic ballast
- the addition of the software-controlled controller thus allows a much more flexible design of the electronic ballast in comparison to the prior art, which brings advantages in particular with dimmable but also with non-dimmable ballasts.
- the invention also relates to an electronic ballast for at least one gas discharge lamp, in particular a fluorescent lamp, with one supplied with an input voltage and controlled by an intermediate circuit voltage regulator
- Output is connected to a load circuit in which at least one lamp can be used, wherein - the intermediate circuit voltage controller directly or indirectly detects the output power of the load circuit, and the intermediate circuit voltage controller has properties that depend on the output power of the load circuit.
- the invention further relates to lamps with such ballasts, to methods for operating an electronic ballast and a computer software program product to support such methods.
- the invention also expressly relates to a microcontroller, as it can be used in such methods or ballasts.
- FIG. 1 shows a schematic representation of an electronic ballast for a fluorescent lamp with a digital DC link voltage controller.
- Fig. 1 In the schematic representation of the electronic ballast according to the invention shown in Fig. 1 was on the representation of the rectifier circuit, which is usually formed by a full-bridge rectifier omitted.
- the rectified mains voltage is supplied to the smoothing circuit, which is formed in the illustrated example by a boost converter, which consists of an inductor Ll, a diode Dl, a storage capacitor Cl and controlled by the DC link voltage regulator 1 switching elements in the form of a field effect transistor Sl.
- the intermediate circuit voltage V 2 provided by the smoothing circuit is supplied to a load circuit 2 containing the inverter 7 and the load circuit 8 with the gas discharge lamp LA arranged therein, which can be a fluorescent lamp.
- the current value of the intermediate circuit voltage V z is first detected via the input line 9.
- the intermediate circuit voltage V z could also be detected indirectly, for example via the input voltage.
- this analog value of the intermediate circuit voltage Vz is converted by an analog-to-digital converter 2 into a digital value u (k). The conversion takes place in each clock cycle of the intermediate circuit voltage regulator 1, wherein the clock is predetermined by a central clock in the form of a fixed-frequency oscillator 3.
- the clock signals of the clock generator 3 are also fed to a computer unit 5, which forms the core of the digital intermediate circuit voltage regulator 1, and to a control block 6 for driving the field-effect transistor Sl.
- the arithmetic unit 5 serves to calculate a control value y (k) in each clock cycle, which is transmitted to the control block 6. This sets the control value y (k) in a signal for operating the field effect transistor Sl and thus controls its on-time.
- the switching of the field effect transistor Sl takes place at a time at which no current flows through the diode Dl, as a result, the switching losses are reduced.
- a detection winding L2 which is inductively coupled to the inductance Ll of the boost converter. Locks the field effect transistor Sl, the current through the inductance Ll drops continuously until it reaches the zero point at a certain time.
- This Time is detected by means of the detection coil L2 of the control block L6 and the field effect transistor Sl switched through while avoiding switching losses again.
- the control value y (k) specifies how long the field effect transistor S1 is turned on. By the duration of the power consumption of the ballast and thus the amount of the provided intermediate circuit voltage V z is determined. However, it is also possible, instead of the switch-on time of the switch Sl, to change its duty cycle as a function of the current control value y (k).
- control value y (k) takes place not only on the basis of the current actual value u (k) of the intermediate circuit voltage V z , but also on the basis of the actual values and the control values in the previous clock cycles. Due to the digital properties, the control value y (k) is calculated according to a specific function, ideally after an infinite series. This infinite series consists of series members, which however in the present example are aborted after the third term in order to keep the effort for calculating the control value within an acceptable range. This means that the current control value y (k) is calculated, for example, using the following equation:
- y (k) al * y (k-l) + a2 * y (k-2) + bl * u (k) + b2 * u (k-l) + b3 * u (k-2)
- y (kl) and y (k-2) denote the values of the control value in the previous and pre-previous clock cycles, respectively, while the values u (kl) and u (k-2) denote the actual values in the previous and previous clock cycles, respectively ,
- u (kl) and u (k-2) denote the actual values in the previous and previous clock cycles, respectively .
- the parameters used to weight the individual row members determine the dynamic behavior of the DC link voltage regulator 1. Accordingly, by using different parameter sets for the control block 6 in calculating the control value y (k), the DC link voltage regulator 1 adapted to different requirements.
- the arithmetic unit 5 of the DC link regulator 1 is assigned an integrated controller 10, which communicates bidirectionally with the arithmetic unit 5 of the intermediate-time regulator 1 (see reference numeral 11).
- the controller 10 is connected to a memory 12. Via a digital interface 13, the controller 10 can receive digital commands, such as dimming value specifications, but also, for example, send status messages or error messages to a connected digital bus, for example with the DALI standard.
- digital commands such as dimming value specifications, but also, for example, send status messages or error messages to a connected digital bus, for example with the DALI standard.
- the DC link controller 1, the controller 10 with the interface 13 and the memory 12 may be embodied for example as an ASIC.
- the software-controlled controller 10 thus receives externally supplied digital commands via the interface 13. Furthermore, the arithmetic unit 5 of the DC link regulator 1 can report back status information or operating parameters to it. Typical examples of this feedback from the arithmetic unit 5 of the DC link regulator to the controller 10 are the type and / or level of the applied input voltage and the current value of the DC link voltage V z .
- Output power of the at least one lamp having load circuit can now the controller 10 of the arithmetic unit 5 of the DC link controller 1 to transmit setpoints for the operation.
- setpoints can, for example, affect the following parameters:
- the controller coefficients must be changed for small dimming values to adapt to the dynamics and stability requirements of the control.
- the T 0N ⁇ values for the switch can be preset and optimized from the table.
- the modulation of the T 0N values of the switch should be reduced for smaller input voltages.
- the DC link controller 1 is set via software depending on externally supplied commands, such as dimming values or feedback from DC link controllers. Furthermore, the DC link regulator can be set to the output power of the load circuit containing the lamp.
- the external default value is in this case, for example, a signal from a controller for the power of the output circuit.
- This setting is particularly important for dimmable electronic ballasts, which may experience static load changes due to variable lamp power compared to non-dimmable electronic ballasts.
- properties of the smoothing circuit it must be possible for properties of the smoothing circuit to be changed even in an operating phase, in particular during operation of the lamp in the ignited state.
- the maximum amplitude as well as the nature of the power supply can be measured according to the invention either directly (for example via the voltage divider and an AD converter). Alternatively, they can be detected indirectly using the following mathematical function:
- V 1n V z x T of f / T 0n + T off
- T Off is the switch-off duration of switch S1 and T 0n is the switch-on time of this switch.
- the controller 10 may also determine these specifications via implemented functions.
- the maximum value of the applied AC voltage can be decided on a specific geographical area (for example, Europe or USA).
- this indirect coverage of the geographic scope can be used to determine acceptable THD limits. Accordingly, then the specifications for the DC link control can be made such that the prevailing in the corresponding geographical area standards are met.
- the bus voltage setpoint specification can be adjusted depending on the height of the detected AC voltage, in principle, the rule applies that the bus voltage is set the higher, the higher the maximum amplitude of the applied AC voltage.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06723768.5A EP1872627B1 (en) | 2005-04-22 | 2006-03-27 | Parameterizable digital pfc (power factor correlation) |
CN2006800130155A CN101164383B (en) | 2005-04-22 | 2006-03-27 | Parameterizable digital pfc |
AU2006239627A AU2006239627B2 (en) | 2005-04-22 | 2006-03-27 | Parameterizable digital PFC (power factor correlation) |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200510018775 DE102005018775A1 (en) | 2005-04-22 | 2005-04-22 | Electronic ballast for e.g. fluorescent lamp, has microcontroller assigned to intermediate circuit voltage regulator, where external instructions are applied to microcontroller, and properties of regulator depend on external instructions |
DE102005018775.7 | 2005-04-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2006114175A2 true WO2006114175A2 (en) | 2006-11-02 |
WO2006114175A3 WO2006114175A3 (en) | 2007-01-11 |
Family
ID=37027709
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2006/002791 WO2006114175A2 (en) | 2005-04-22 | 2006-03-27 | Parameterizable digital pfc (power factor correlation) |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1872627B1 (en) |
CN (1) | CN101164383B (en) |
AU (1) | AU2006239627B2 (en) |
DE (1) | DE102005018775A1 (en) |
WO (1) | WO2006114175A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008057333A1 (en) * | 2008-11-14 | 2010-05-20 | Tridonicatco Gmbh & Co. Kg | Adaptive PFC for lamp load circuit, in particular load circuit with LED |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7288902B1 (en) | 2007-03-12 | 2007-10-30 | Cirrus Logic, Inc. | Color variations in a dimmable lighting device with stable color temperature light sources |
US7667408B2 (en) | 2007-03-12 | 2010-02-23 | Cirrus Logic, Inc. | Lighting system with lighting dimmer output mapping |
US9155174B2 (en) | 2009-09-30 | 2015-10-06 | Cirrus Logic, Inc. | Phase control dimming compatible lighting systems |
FR2961967B1 (en) * | 2010-06-24 | 2012-07-20 | Continental Automotive France | METHOD FOR MANAGING THE POWER SUPPLY VOLTAGE OF AN AUTOMOTIVE VEHICLE ELECTRONIC COMPUTER |
US8536799B1 (en) | 2010-07-30 | 2013-09-17 | Cirrus Logic, Inc. | Dimmer detection |
US8729811B2 (en) | 2010-07-30 | 2014-05-20 | Cirrus Logic, Inc. | Dimming multiple lighting devices by alternating energy transfer from a magnetic storage element |
US9307601B2 (en) | 2010-08-17 | 2016-04-05 | Koninklijke Philips N.V. | Input voltage sensing for a switching power converter and a triac-based dimmer |
CN103314639B (en) | 2010-08-24 | 2016-10-12 | 皇家飞利浦有限公司 | Prevent the apparatus and method that dimmer resets in advance |
DE102012206349A1 (en) | 2011-12-23 | 2013-06-27 | Tridonic Gmbh & Co Kg | Method and circuit arrangement for operating bulbs with load jump |
WO2013126836A1 (en) | 2012-02-22 | 2013-08-29 | Cirrus Logic, Inc. | Mixed load current compensation for led lighting |
DE102012017397A1 (en) * | 2012-04-13 | 2013-10-17 | Tridonic Gmbh & Co. Kg | A method of controlling a power factor correction circuit, power factor correction circuit, and lighting device driver |
US9184661B2 (en) | 2012-08-27 | 2015-11-10 | Cirrus Logic, Inc. | Power conversion with controlled capacitance charging including attach state control |
DE102012216047A1 (en) * | 2012-09-11 | 2014-03-13 | Tridonic Gmbh & Co. Kg | Setting of a power factor correction for load circuit with lamps |
US10187934B2 (en) | 2013-03-14 | 2019-01-22 | Philips Lighting Holding B.V. | Controlled electronic system power dissipation via an auxiliary-power dissipation circuit |
AT15366U1 (en) * | 2016-04-07 | 2017-07-15 | Tridonic Gmbh & Co Kg | Method and circuit arrangement for the operation of lamps |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0490329A1 (en) * | 1990-12-07 | 1992-06-17 | Tridonic Bauelemente GmbH | System for controlling the light intensity and the behaviour of gas discharge lamps |
US6147463A (en) * | 1997-03-04 | 2000-11-14 | Tridonic Bauelemente Gmbh | Electronic ballast for the operation of at least one gas discharge lamp |
US6316886B1 (en) * | 1997-03-04 | 2001-11-13 | Tridonic Bauelemente Gmbh | Method and device for controlling the operational performance of gas discharge lamps |
EP1189490A1 (en) * | 2000-09-15 | 2002-03-20 | Tridonic Bauelemente GmbH | Electronic ballast for fluorescent lamp |
EP1189489A1 (en) * | 2000-09-15 | 2002-03-20 | Tridonic Bauelemente GmbH | Control circuit with configuration intput |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE50111720D1 (en) * | 2000-09-15 | 2007-02-08 | Tridonicatco Gmbh & Co Kg | Electronic ballast with digital control unit |
-
2005
- 2005-04-22 DE DE200510018775 patent/DE102005018775A1/en not_active Withdrawn
-
2006
- 2006-03-27 CN CN2006800130155A patent/CN101164383B/en not_active Expired - Fee Related
- 2006-03-27 EP EP06723768.5A patent/EP1872627B1/en not_active Not-in-force
- 2006-03-27 WO PCT/EP2006/002791 patent/WO2006114175A2/en not_active Application Discontinuation
- 2006-03-27 AU AU2006239627A patent/AU2006239627B2/en not_active Ceased
- 2006-03-27 EP EP10182614.7A patent/EP2296449B1/en active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0490329A1 (en) * | 1990-12-07 | 1992-06-17 | Tridonic Bauelemente GmbH | System for controlling the light intensity and the behaviour of gas discharge lamps |
US6147463A (en) * | 1997-03-04 | 2000-11-14 | Tridonic Bauelemente Gmbh | Electronic ballast for the operation of at least one gas discharge lamp |
US6316886B1 (en) * | 1997-03-04 | 2001-11-13 | Tridonic Bauelemente Gmbh | Method and device for controlling the operational performance of gas discharge lamps |
EP1189490A1 (en) * | 2000-09-15 | 2002-03-20 | Tridonic Bauelemente GmbH | Electronic ballast for fluorescent lamp |
EP1189489A1 (en) * | 2000-09-15 | 2002-03-20 | Tridonic Bauelemente GmbH | Control circuit with configuration intput |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008057333A1 (en) * | 2008-11-14 | 2010-05-20 | Tridonicatco Gmbh & Co. Kg | Adaptive PFC for lamp load circuit, in particular load circuit with LED |
DE112009002486B4 (en) | 2008-11-14 | 2022-07-07 | Tridonic Gmbh & Co Kg | Adaptive PFC for lamp load circuit, especially load circuit with LED |
Also Published As
Publication number | Publication date |
---|---|
EP2296449B1 (en) | 2016-03-16 |
WO2006114175A3 (en) | 2007-01-11 |
DE102005018775A1 (en) | 2006-10-26 |
EP2296449A1 (en) | 2011-03-16 |
CN101164383A (en) | 2008-04-16 |
AU2006239627B2 (en) | 2010-02-04 |
EP1872627B1 (en) | 2013-05-22 |
CN101164383B (en) | 2012-07-04 |
EP1872627A2 (en) | 2008-01-02 |
AU2006239627A1 (en) | 2006-11-02 |
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