EP1872636A1 - Einstellbare digitale leuchtmittelleistungsregelung - Google Patents
Einstellbare digitale leuchtmittelleistungsregelungInfo
- Publication number
- EP1872636A1 EP1872636A1 EP06742658A EP06742658A EP1872636A1 EP 1872636 A1 EP1872636 A1 EP 1872636A1 EP 06742658 A EP06742658 A EP 06742658A EP 06742658 A EP06742658 A EP 06742658A EP 1872636 A1 EP1872636 A1 EP 1872636A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- power
- digital
- lamp
- setpoint
- 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
- 238000000034 method Methods 0.000 claims description 15
- 230000001419 dependent effect Effects 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 2
- 238000002565 electrocardiography Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- H05B41/36—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
- H05B41/3925—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by frequency variation
-
- 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 generally to the digital control of the power of lighting devices, such as may be applied by an electronic ballast (ECG) for gas discharge lamps.
- ECG electronic ballast
- Digital regulation of the power of a light source in this context means that depending on a return flow as actual value and an internally or externally generated setpoint according to an implemented control algorithm, a control variable is generated, which dictates the power of the light source based on a specific parameter.
- the return flow size can be, for example, a parameter that reflects the power of the light source, such as, for example, the light source voltage, the luminous flux or the light output (measured, for example, via photodiodes).
- ECGs electronic ballasts
- the present invention has now set itself the task of designing a digital lighting power control more flexible.
- a method for controlling the power of a light source such as a gas discharge lamp when using an electronic ballast (EVGs)
- EDGs electronic ballast
- a lamp parameter is fed back as an actual value and compared with an internal or externally predetermined setpoint becomes.
- a control value for the lamp power that depends on the comparison of the setpoint with the actual value is then calculated and output.
- Gemass of the invention is used as a setpoint dimming signal.
- the invention thus relates to bulbs with preselectable power PDimmen ').
- At least one property of the digitally implemented algorithm is changed depending on the value of the currently applied dimming signal. With smaller dimming values, the digitally implemented algorithm thus differs in at least one property from its state for larger dimming values.
- the digitally implemented algorithm can use governing coefficients that can be changed depending on the value of the currently applied dimming signal.
- Time constants of the digitally implemented algorithm can be changed depending on the value of the currently applied dimming signal.
- the calculated control value can specify a frequency to be set for the supply voltage of the gas discharge lamp in the case of using a gas discharge lamp as the light source, since gas discharge lamps can be subjected to a frequency control as is known.
- the measured variable which causes the switching can be, for example, the dimming value and / or the temperature of the luminous means. This plays a major role in particular in the case of the gas discharge lamp with temperature-dependent impedance.
- the other physical quantity may be the directly or indirectly detected impedance and / or the temperature of the luminous means.
- the invention relates to the digital power control of lighting devices, in which the dynamic properties of the power control are changed depending on the value of a supplied dimming signal.
- the invention also relates to a computer software program product that supports such digital control methods when running on a computing device.
- a dimmable electronic control device for lighting means, in particular electronic ballast for gas discharge lamps.
- the operating device has a digital control system for the power of the light source.
- a digital interface is provided, which is configured to supply dimming signals as setpoints for the digital control system.
- a device is provided in the operating device which is designed to set properties of the digital control system as a function of the current value of the dimming signals.
- This setting means may be arranged to adjust coefficients of the digital control system depending on the current value of the dimming signals.
- the device may be configured to adjust dynamic characteristics of the digital control system depending on the current value of the dimming signals.
- the invention also relates to a digital control circuit for the power of lighting means, which generates a power control value depending on a zubuchten actual value and a desired value.
- the circuit has a digital interface.
- the digital interface is configured as a setpoint for dimming signals.
- the digital control circuit is designed to change its characteristics depending on dimming signals supplied by the digital interface.
- Fig. 1 shows a schematic view of an inventive digital
- FIG. 2 shows a detailed view of FIG.
- System memory 6 stored coefficients
- Fig. 3 shows the different coefficients used for different adjacent ones
- a digital circuit 1 for controlling the power of a connected light source is shown schematically.
- This digital circuit 1 is part of a Radio-Fields for the bulbs.
- the invention will be explained with reference to an electronic ballast as an example of an operating device and to a gas discharge lamp as an example of a light source. In the meantime, the invention can also be applied to other dimmable operating devices and illuminants
- the digital circuit 1 generates as a control signal
- Supply DC voltage V z (DC link voltage) can be converted into an AC voltage with adjustable frequency, which is tapped at the midpoint of the inverter 14.
- an RC circuit with an inductor 13 and a capacitor 18 are provided in a known manner, to which a coupling capacitor 16 to the lamp 17 is connected in parallel.
- the lamp 17 can be electrically reproduced as a variable impedance resistor.
- a signal S ⁇ M p which directly or indirectly reflects the lamp impedance.
- S pow is a signal indicating the lamp power.
- the lamp power can be reproduced for example by the lamp voltage, the lamp current or else the light power (detected, for example, via photodetectors).
- the returned to the digital control circuit 1 return signals Si MP , S pow thus represent actual values of the lamp operation and are digitized by AD converter 19, 20.
- the digitized actual value of the lamp power reproducing signal S pow is compared with a first reference voltage V ref i. This reference voltage represents an internal setpoint value. As shown in FIG.
- this setpoint value can however depend, in particular, on an externally supplied dimming value.
- the result of the comparison actual value / setpoint represents the control error e (k), which is supplied to a first digital controller 4.
- the digital controller is preferably implemented purely in software, with the A / D converted signals directly feedable to this software controller. This allows for increased processing speed and faster response to changes compared to caching.
- the purely digital execution allows a high flexibility of the controller properties.
- a control algorithm is implemented in a digital manner, which generates a control signal 8, depending on the supplied input signal, by means of the corresponding position of a electronic switch 10 (FET, etc.) an inverter driver 12 is driven, so that the output signal (control signal y (k)) of the controller 4 indicates the operating frequency of the inverter 14 and the operating frequency of the inverter 14 again due to the known resonance curve of a gas discharge lamp 17 Indicates lamp power.
- the control branch using an inverter 14, in which the control size so the frequency of the
- Example dar For gas discharge lamps but especially for other bulbs (light emitting diodes, etc.) are other control variables, such as light bulbs, etc. known, which can be used at any time in connection with the present invention.
- the digital circuit 1 has a system controller 2, which processes a program stored as a firmware.
- the system controller 2 is connected to a system memory 6 and is clocked by a system clock (system clock) 7.
- the system controller 2 is connected to an interface 3, which can be supplied with dimming signals from the outside, for example from a bus line.
- the external dimming signals may be analog and / or digital, in any case, the interface 3 transmits to the system controller 2 digital values that reflect the applied dimming signals.
- the system controller 2 is, for example, firmware configured such that it adjusts properties of the controller 4 depending on the digital values supplied by the interface 3, which thus reproduce the external dimming signals.
- properties of the controller 4 can be assigned to certain dimming values, so the system controller 2 can read out the properties required for the application of a specific dimming value from the system memory 6 and set the controller 4 accordingly.
- the controller 4 has properties that can be set on the system controller 2 depending on externally supplied Dimmsignalen.
- a second regulator 5 can be provided as an actual variable, for example the lamp impedance Si M p, for a further feedback signal.
- this controller 5 is supplied with digitized values directly from the AC converter 19, which thus represent a signal which directly or indirectly represents the current lamp impedance S IMP .
- the controller 5 also generates a control signal 9 according to the control algorithm implemented digitally in it, depending on a comparison of the actual impedance with a desired value for the impedance, which is reproduced in the form of a voltage VR EF2 .
- the electronic switch 10 is driven and thus selected whether the control signal 8 from the first digital controller 4 or the control signal 9 from the second controller 5 should be used as an actual input signal for the inverter driver 12.
- the switch controller 11 can thereby adjust the electronic switch 10 as a function of the current value of the digitized signal S IMP reproducing the lamp impedance. For example, it may be provided that the switch controller 11 only activates the switch 10 for use of the second regulator 5 when the currently applied signal S IMP representing the lamp impedance is above a predetermined threshold value. So if the signal impedance directly or indirectly representing the lamp impedance S IMP (in digital form) over one predetermined threshold, a control is performed by using the lamp impedance S ⁇ M p as jerk vehicle Large, otherwise, ie, when the lamp impedance is while below a predetermined limit value, to which the lamp power reproducing signal Sp o w is controlled as a jerk vehicle Large and actual value.
- the properties of the second controller 5 are adjustable by the system controller 2 in a comparable manner to the first controller 4 as a function of adjacent dimming values.
- the controller 4 and optionally also the controller 5 generate an output signal y (k) depending on an input signal e (k) and possibly also the value of the input signal not only to the currently present time step K, but also preceding time steps k-1, k-2, ...
- the control signal y (k) can thus be calculated using a linear combination consisting of so-called control coefficients all, a21,... Of the control difference e (k) present at the current time step K and a series of control differences for preceding time steps e (k-1). , e (k-2), ...
- linear combination can thus be represented, for example, as follows:
- y (k) S 1 ⁇ e (k) + a 2 ⁇ e (kl) + ... a n • e (knl) + b! ⁇ y (k) + b 2 ⁇ y (kl) + ... Jb 1n - y (kml)
- a and b are governor coefficients.
- k is the current time step (clock).
- m is the maximum number of considered in the Past values.
- Ballast usually determines the choice of suitable control coefficients. These are chosen so that the closed loop reacts quickly but also stably to changes in the input or to disturbances.
- the properties of the controller can also be adjusted depending on the current operating state of the lamps in operation.
- these different operating states can be, for example:
- the current operating state can be measured (for example, based on the lamp current and / or the lamp voltage) or estimated from the time elapsed since the ignition.
- the properties of the digital implementation of the control algorithm in software are set depending on the currently set dimming value, which may be done by the system controller 1 using the coefficients from the system memory 6, as explained above.
- control coefficients a1, a21 etc. can be changed relatively easily by control signals from the system controller 1.
- control signals from the system controller 1 In a comparable analog system would need to switch between different hardware elements, which is complicated and costly and also affects the accuracy of the system.
- the control properties can be changed in such a way that the type of the selected return amount is changed as the actual value. For example, it may be provided that it is then no longer the signal S pow reproducing the lamp power, but another measured variable, such as the impedance of the lamp Si MP, used as a return variable, in order to ensure stable operation of the lamp.
- another measured variable such as the impedance of the lamp Si MP, used as a return variable, in order to ensure stable operation of the lamp.
- the values and the number of control coefficients can also be changed at the same time. For this purpose, as mentioned, switching to a second controller 5 may be advantageous.
- the digital control circuit 1 may also be implemented in hardware, software, programmable logic, or any combination thereof.
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200510018774 DE102005018774A1 (de) | 2005-04-22 | 2005-04-22 | Einstellbare digitale Leuchtmittelleistungsregelung |
| PCT/EP2006/003757 WO2006111422A1 (de) | 2005-04-22 | 2006-04-24 | Einstellbare digitale leuchtmittelleistungsregelung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1872636A1 true EP1872636A1 (de) | 2008-01-02 |
| EP1872636B1 EP1872636B1 (de) | 2013-11-13 |
Family
ID=36748382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06742658.5A Expired - Lifetime EP1872636B1 (de) | 2005-04-22 | 2006-04-24 | Einstellbare digitale leuchtmittelleistungsregelung |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1872636B1 (de) |
| CN (1) | CN101164387A (de) |
| AU (1) | AU2006237227B2 (de) |
| DE (1) | DE102005018774A1 (de) |
| WO (1) | WO2006111422A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8664894B2 (en) | 2009-12-08 | 2014-03-04 | Koninklijke Philips N.V. | Method and device for driving a fluorescent lamp |
| CN102438381B (zh) * | 2011-09-29 | 2013-12-04 | 林建辉 | 一种高速车辆客室内照度模拟系统的实现方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4018127A1 (de) * | 1990-06-06 | 1991-12-12 | Zumtobel Ag | Verfahren und schaltungsanordnung zur regelung der helligkeit (dimmen) von gasentladungslampen |
| DE4039161C2 (de) * | 1990-12-07 | 2001-05-31 | Zumtobel Ag Dornbirn | System zur Steuerung der Helligkeit und des Betriebsverhaltens von Leuchtstofflampen |
| DE19708783C1 (de) * | 1997-03-04 | 1998-10-08 | Tridonic Bauelemente | Verfahren und Vorrichtung zum Regeln des Betriebsverhaltens von Gasentladungslampen |
| DE19748007A1 (de) * | 1997-10-30 | 1999-05-12 | Tridonic Bauelemente | Schnittstelle für ein Lampenbetriebsgerät |
-
2005
- 2005-04-22 DE DE200510018774 patent/DE102005018774A1/de not_active Withdrawn
-
2006
- 2006-04-24 EP EP06742658.5A patent/EP1872636B1/de not_active Expired - Lifetime
- 2006-04-24 CN CNA2006800130051A patent/CN101164387A/zh active Pending
- 2006-04-24 AU AU2006237227A patent/AU2006237227B2/en not_active Ceased
- 2006-04-24 WO PCT/EP2006/003757 patent/WO2006111422A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006111422A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006111422A1 (de) | 2006-10-26 |
| CN101164387A (zh) | 2008-04-16 |
| AU2006237227A1 (en) | 2006-10-26 |
| AU2006237227B2 (en) | 2010-02-04 |
| EP1872636B1 (de) | 2013-11-13 |
| DE102005018774A1 (de) | 2006-10-26 |
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