EP2526739A2 - Elektronisches vorschaltgerät zum betreiben einer hybridleuchte - Google Patents
Elektronisches vorschaltgerät zum betreiben einer hybridleuchteInfo
- Publication number
- EP2526739A2 EP2526739A2 EP11804983A EP11804983A EP2526739A2 EP 2526739 A2 EP2526739 A2 EP 2526739A2 EP 11804983 A EP11804983 A EP 11804983A EP 11804983 A EP11804983 A EP 11804983A EP 2526739 A2 EP2526739 A2 EP 2526739A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupled
- electronic ballast
- control
- control device
- input
- 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
- 238000004804 winding Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000000875 corresponding effect Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 101100210287 Drosophila melanogaster wech gene Proteins 0.000 description 1
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000001419 dependent effect Effects 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
- H05B35/00—Electric light sources using a combination of different types of light generation
Definitions
- the present invention relates to an electronic on ⁇ switching device for operating a hybrid lamp with at least one discharge lamp and at least one LED.
- the electrostatic ⁇ African ballast includes a preheating means for preheating the at least one discharge lamp, wherein the preheating device comprises a transformer, a first electronic switch having a working electrode, a reference ⁇ electrode and a control electrode of a first diode and ei ⁇ NEN first ohmic resistance, wherein the series ⁇ circuit of the primary winding of the transformer, the distance working electrode reference electrode of the first electronic switch, the first diode and the first ohmic resistor between a supply voltage terminal and a reference potential is coupled, and a control device with at least a first output for driving the at least one discharge lamp , a second output for driving the at least one LED, a third output which is coupled at least to the control electrode of the first electronic sound ⁇ ters, and an input for measuring the preheating current during the preheating of the at least one discharge lamp is coupled to the
- Hybrid lights are usually implemented with two separate pre-switching devices, one for operating the at least one discharge lamp and one for operating the Minim ⁇ least one LED.
- Each electronic ballast is connected to the supply network via its own power cable and can be activated separately. If only one electronic ballast is used, a control signal is to cause the controller to switch between the discharge lamp lighting and LED operation and turn hither ⁇ .
- a control signal a signal can be used which is either coupled to a Netzpol or open.
- Such control devices are usually realized as an ASIC or as a microcontroller. Since most control devices in such a circuit environment already have all the pins occupied for other functionalities, it is necessary to use a more expensive control device with more pins. This is reflected in undesirably high costs never ⁇ of.
- the object of the present invention is therefore to develop an aforementioned electronic ballast such that the conditions for an outward and
- Switching between fluorescent lamp operation and LED operation can be created in the most cost-effective manner possible.
- a control device is used by way of example as a control device, which is usually used in a ballast for discharge lamps. This controls the switches of a half-bridge via two outputs, as is usually used to control the discharge lamp. It also has an output with which a driver device for operating the at least one LED can be activated.
- the present invention is based on the recognition that no additional input, ie no additional pin, is required at the control device for the control signal when an input channel of the control device is used twice. Upon careful analysis of the signals at the inputs of such a controller, it has been found that an input is used to measure the preheat flow during the preheat phase of the discharge lamp.
- the present invention is now based in particular on the recognition that in the preheating phase no recognition of a control signal for switching back and forth between discharge ⁇ lamp operation and LED operation is necessary. This is because at the latest 100 ms, typically even 50 ms, is decided after applying the supply voltage to the electronic ballast, whether discharge lamp operation or LED operation is required.
- the signal is evaluated at the control input and, depending on switched to LED mode or preheating the coils of the at least one discharge lamp initiated to then ignite the at least one discharge lamp.
- the preheating he ⁇ no evaluation of the signal at the control input follows. After completion of the preheating can then be switched by a corresponding signal at the control input again between discharge lamp operation and LED operation. This also applies if LED operation was selected at the first switch-on by a corresponding signal at the control input. Then, when the LEDs are also continuously evaluated, the signal at the control input and by a corresponding signal can be switched to discharge lamp operation including preheating.
- an electronic ballast further comprises a control input for applying a control signal in order to switch between an operation of the at least one fluorescent lamp and an operation of the at least one LED; a second electronic switch having a working electrode, a reference electrode and a STEU ⁇ erelektrode, wherein the control electrode of the second electronic switch is coupled to the third output of the control device, wherein the reference electrode is coupled to the reference potential ⁇ tial, wherein the working electrode with the Control input is ⁇ coupled, and a second diode which is coupled between the working electrode of the second electronic switch and the input of the control device.
- a voltage divider is coupled between the control input and the input of the control device. This serves to shut allocate the control signal, the AC voltage is on the level of the mains to a magnitude that, evaluated by a control device, which is usually realized as an IC or microcontroller who can ⁇ .
- a low pass is serially coupled to the input of the control device. This is used for averaging the falling over the first ohmic resistor voltage which is correlated to the pre-heating, so that can be done a zuverlässi ⁇ ge evaluation by the control device.
- the low-pass filter preferably comprises a second ohmic resistor which is serially coupled between the series connection of the first diode and the first ohmic resistor on the one hand and the input of the control device on the other hand.
- the second ohmic resistance can also be used for clamping ⁇ voltage division of the AC mains voltage at the control input.
- the second ohmic resistance is preferably between 0.1 and 10 k, in particular 1 k.
- the second diode with the coupling point of the second ohmic resistor and the A ⁇ passage is coupled to the control device. This will do that On the one hand, the signal applied to the control input is reliably applied to the input of the control device, on the other hand, despite the second electronic switch being switched on, reliable evaluation of the voltage drop across the first resistive resistor, which is correlated with the preheating current, can be made at the input of the control device.
- the low pass further comprises the parallel scarf ⁇ tion of a third ohmic resistance and a capacitor.
- the low pass is preferably designed such that it has a cutoff frequency between 1 and 100 kHz, in particular 10 kHz.
- the cutoff frequency is well below the preheat frequency, which is usually between 100 kHz and 130 kHz.
- the mean value of the preheating current is therefore evaluated; the evaluation of the control signal is, however a peak Dear ⁇ mediation.
- a first inverter is coupled between the third output of the control device and the control electrode of the first electronic switch. This serves to increase the level at the third output of the control device, which is usually about 3 V, to a value which is sufficient to drive the control electrode of the first electronic switch. This usually requires 15V.
- a second inverter is preferably coupled between the third output of the control device and the control electrode of the second electronic switch.
- the electronic ballast further comprises a fourth diode which is antipa ⁇ coupled in parallel to the series connection of the first diode and the first ohmic resistor. This diode serves as a freewheeling diode for the negative current components through the first electronic switch. This ensures that only positive amounts of current during preheating of the
- control device are evaluated and thus a meaningful averaging is made possible.
- control signal preferably represents a network signal.
- Fig. 1 is a schematic representation of a first embodiment of an electronic ballast according to the invention
- Fig. 2 is a brief summary of the operation of the in
- FIG. 1 illustrated embodiment
- Fig. 3 shows a second embodiment of an inventive ⁇ Shen electronic ballast.
- Fig. 1 shows a schematic representation of a first embodiment of an electronic ballast according to the invention.
- This comprises a control device 10 which comprises two outputs Ala, Alb, to drive the switch of a Wech ⁇ selrichters, whose load circuit is coupled to at least ei ⁇ ner discharge lamp FL. It also comprises an output A2, which is designed to drive a driver module for operating at least one LED.
- a control device 10 which comprises two outputs Ala, Alb, to drive the switch of a Wech ⁇ selrichters, whose load circuit is coupled to at least ei ⁇ ner discharge lamp FL. It also comprises an output A2, which is designed to drive a driver module for operating at least one LED.
- the series connection of a transformer Tr which has a primary winding L1A and a secondary winding L1B, an electronic switch M1, a diode D1 and an ohmic resistance R1 provided between a supply voltage V c and a reference potential is coupled.
- the filaments of the at least one discharge lamp FL are coupled in a known manner to the secondary winding LIB of the transformer Tr.
- the be ⁇ vorzugt as a transistor having a control electrode, working ⁇ electrode and reference electrode
- an output A3 of the control device 10 is provided, in the present case an inverter is gekop- pelt between the output of A3 and the switch Ml.
- the switch Ml When the switch Ml is turned on, a current flows from the power supply V c , through the primary winding L1A of the transformer Tr, the switch Ml, the diode Dl and the ohmic resistor Rl, the preheating current through the turn of the at least one discharge lamp FL is proportional.
- the across the diode Dl and the resistor Rl from ⁇ falling voltage is coupled via a low-pass TP to input El of the control device 10 to determine the pre-heating current and to regulate, if necessary.
- a diode D3 which is connected in anti-parallel to the series circuit of the diode Dl and the ohmic resistor Rl, serves as a freewheeling diode for negative current components in the preheating, in order to allow meaningful averaging.
- the control device 10 can have a multiplicity of further inputs and outputs.
- the output A2 can be used twice by appropriate, but not relevant measures here.
- the circuit arrangement described so far is known with the exception of the use of the output A2 of the control device 10.
- the designated 12 assembly now includes the
- the signal present at the control input St control signal may represent in particular ⁇ sondere a network signal. It is connected via a resistor R8 to the working electrode of a second electronic switch M4 whose reference electrode is grounded.
- the control electrode of the second electronic switch M4 ⁇ rule as the control electrode of the first electronic switch Ml to the output A3 of the tax regulations direction 10 is coupled.
- an inverter is coupled between the output A3 of the control device 10 and the control electrode of the switch M4, as well as in the electronic switch Ml.
- the working electrode of the second electronic switch M4 is coupled via a diode D2 to the reference electrode of the first electronic switch Ml.
- the output A3 of the control device 10 is at "logic 0", ie to ground.Thus, both the switch Ml
- the control signal at the control input St is short-circuited, that is, at the input E1 of the control device 10
- only the signal dropping across the series circuit from the diode D1 and the ohmic resistor R1 is evaluated. which is proportional to the preheating current through the filaments of the at least one discharge lamp FL Ab ⁇ flow of this signal via the switch M4 to ground is prevented by the diode D2.
- FIG. 3 shows a schematic illustration of a second exemplary embodiment of an electronic ballast according to the invention. This corresponds essentially to the exemplary embodiment shown schematically in FIG. 1, although some of the assemblies shown only schematically in FIG. 1 are shown in more detail.
- the second inverter coupled between the output A3 and the control electrode of the switch M4, comprises ohmic resistors R5 and R6 and a further electronic switch M3. No additional ohmic resistance must then be provided between the working electrode of the switch M3 and the control electrode of the switch M4 if the resistance RDson of the switch M3 is large enough, for example of the order of 10 ⁇ .
- a low-pass filter is connected, which comprises the parallel connection of an ohmic resistor RIO and a capacitor Cl.
- a voltage ⁇ divider formed by the series circuit of the ohmic resistor R8 with a combination comprising a parallel scarf ⁇ tung the resistor RIO to a series circuit of resistors R9 and Rl.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201010064069 DE102010064069A1 (de) | 2010-12-23 | 2010-12-23 | Elektronisches Vorschaltgerät zum Betreiben einer Hybridleuchte |
| PCT/EP2011/072466 WO2012084577A2 (de) | 2010-12-23 | 2011-12-12 | Elektronisches vorschaltgerät zum betreiben einer hybridleuchte |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2526739A2 true EP2526739A2 (de) | 2012-11-28 |
| EP2526739B1 EP2526739B1 (de) | 2014-02-19 |
Family
ID=45445997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11804983.2A Not-in-force EP2526739B1 (de) | 2010-12-23 | 2011-12-12 | Elektronisches vorschaltgerät zum betreiben einer hybridleuchte |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2526739B1 (de) |
| DE (1) | DE102010064069A1 (de) |
| WO (1) | WO2012084577A2 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007066252A1 (en) * | 2005-12-09 | 2007-06-14 | Koninklijke Philips Electronics N.V. | Method for driving a hybrid lamp and a hybrid lamp assembly |
| CN101803465B (zh) * | 2007-06-29 | 2013-06-26 | 奥斯兰姆有限公司 | 用于驱动至少一个发光二极管和至少一个荧光灯的电路装置和方法 |
| US7759880B2 (en) * | 2008-02-12 | 2010-07-20 | General Electric Company | Combined ballast for fluorescent lamp and light emitting diode and method of driving same |
-
2010
- 2010-12-23 DE DE201010064069 patent/DE102010064069A1/de not_active Withdrawn
-
2011
- 2011-12-12 WO PCT/EP2011/072466 patent/WO2012084577A2/de not_active Ceased
- 2011-12-12 EP EP11804983.2A patent/EP2526739B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2012084577A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012084577A3 (de) | 2012-08-30 |
| EP2526739B1 (de) | 2014-02-19 |
| DE102010064069A1 (de) | 2012-06-28 |
| WO2012084577A2 (de) | 2012-06-28 |
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