EP2796011A2 - Betrieb von leuchtmitteln - Google Patents
Betrieb von leuchtmittelnInfo
- Publication number
- EP2796011A2 EP2796011A2 EP12818498.3A EP12818498A EP2796011A2 EP 2796011 A2 EP2796011 A2 EP 2796011A2 EP 12818498 A EP12818498 A EP 12818498A EP 2796011 A2 EP2796011 A2 EP 2796011A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control unit
- switch
- terminal
- signal
- potential
- 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
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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- 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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
- H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
- H05B41/2981—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
- H05B41/2985—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal lamp operating conditions
Definitions
- the present invention relates to the operation of light sources, in particular gas discharge lamps.
- control unit usually, the operation of light sources, in particular gas discharge lamps, is taken over by a control unit.
- a control unit has different terminals which are each designed to output control signals or to receive measurement signals or other feedback signals.
- a first aspect of the invention relates to a method for operating at least one luminous means, such as a gas discharge lamp, starting from a clocked switching regulator circuit, which is preferably designed as an inverter.
- a switch of the switching regulator circuit is driven by a control signal.
- the control signal is provided by a control unit at a terminal of the control unit.
- the terminal In periods when the switch is not driven by the control unit, the terminal is used for receiving signals by the control unit. In other words, the control unit is then in a receive mode.
- the number of terminals of the control unit can be reduced.
- Another aspect of the invention relates to a control circuit or control unit, in particular ASIC or microcontroller, which is designed for such a method.
- Another aspect of the invention relates to an operating device for lighting means, in particular for gas discharge lamps, having such a control circuit or control unit or which is designed for such a method.
- Another aspect of the invention relates to an operating circuit, in particular electronic ballast, for operating at least one light source, such as a gas discharge lamp, starting from a preferably designed as an inverter clocked switching regulator circuit.
- the operating circuit is designed such that a switch of the switching regulator circuit is driven by a control signal, wherein the control signal is provided by a control unit at a terminal of the control unit.
- the operating circuit is designed in such a way that during periods in which the switch is not actuated by the control unit, the terminal is used for receiving signals by the control unit.
- connection can be supplied with a measurement signal which represents an electrical parameter with respect to the operation of the luminous means. From a signal or measurement signal which is received by the control unit at the terminal, an error condition with respect to the operation of the lighting means can be determined.
- the fault condition may be a coil break or failure to insert the bulb or a lack of coupling of the bulb with the switching regulator circuit.
- the type of the illuminant used can be determined and be adjustable according to at least one adapted to the type of lamp operating parameters.
- connection can be connected to the light source via a DC path. Respectively. the connection can be connected to a DC path formed by the luminous means.
- the DC path can be connected to the potential higher coil and / or to the potential-low coil of the lamp.
- a voltage preferably DC voltage, can be applied to the DC path.
- the voltage applied to the DC path may be different than an input voltage of the switching regulator circuit.
- the voltage applied to the DC path may be an internal voltage or current of the control unit.
- a change in the level of the signal or measurement signal received at the terminal can be detected by the control unit.
- appropriate measures for the operation of the lamp can be made.
- the level of the signal or measurement signal received at the terminal can be compared by the control unit with a threshold value.
- Corresponding measures can preferably be taken for the operation of the lamp.
- connection can only be released for receiving signals when the switching regulator circuit is not clocked or not operated.
- the switching regulator circuit may have a potential-selective switch, which is electrically isolated from the control unit, and a preferably lower-potential switch.
- the terminal for receiving signals can be used to drive the switch isolated from the control unit.
- the switching regulator circuit may comprise a switch which is higher in potential by the control unit and a potential-lower switch connected to ground.
- the terminal for receiving signals may be used to drive the higher-potential switch.
- FIG. 1 shows a schematic representation of an embodiment of the invention.
- Fig. 1 is an embodiment of a
- Illumination system 1 according to the present invention shown.
- the lighting system 1 comprises in preferably dimmable operating device for lighting means.
- illuminants come e.g. Gas discharge lamps, in particular
- the lighting system 1 is powered by a first voltage Vbus.
- This first voltage is for example a DC voltage or DC voltage.
- a DC voltage can be provided as a bus voltage or DC link voltage.
- an AC voltage for example, an AC voltage
- This DC voltage Vbus is supplied to an inverter 2, which is realized in the embodiment of FIG. 1 as a half-bridge.
- the inverter 2 can be realized as a full bridge.
- the inverter 2 is a switching regulator, which is designed as a resonant converter.
- the inverter 2 generates an alternating voltage with a frequency adjustable by a control unit 5.
- the dimming of a connected gas discharge lamp 4 can be done by changing the frequency of the generated AC voltage and / or by changing the level of the inverter 2 supplying DC voltage Vbus.
- the designed as a half-bridge inverter 2 comprises two series-connected switches Sl, S2 alternately.
- the switches Sl, S2 are preferably designed as power transistors and in particular as a MOSFET.
- the drain terminal of the first switch Sl which is also referred to as a higher-potential switch, is connected to the DC voltage Vbus.
- the source connection of the higher-potential switch Sl is connected to the drain terminal of the second switch S2, which is also referred to as a potential-low switch.
- the source terminal of the potential low switch S2 is finally connected to ground.
- the switching of the switches Sl, S2 takes place in a known manner by the control unit 5, which can be realized as an integrated circuit (IC) and in particular as an ASIC.
- the control unit has two terminals 11, 12, which serve to control the respective switches Sl, S2.
- a first control signal Vsl is generated by the control unit 5.
- the first control signal Vsl controls the switch S1 in a direct or indirect manner.
- a second control signal Vs2 for controlling the potential-low switch S2 is provided by the control unit 5.
- a resistor R5 is also provided between the gate terminal and the source terminal of the potential-low switch S2.
- the shape of such control signals Vsl, Vs2 is known per se.
- these control signals Vsl, Vs2 may e.g. be formed as PWM signals.
- Fig. 1 shows an embodiment of an indirect control of the switch Sl, in which an intermediate circuit 6 is provided between the terminal 11 and the higher-potential switch Sl.
- This intermediate circuit 6 serves in principle to bring about a potential separation between the control unit 5 and switch Sl.
- Intermediate circuit 6 comprises a transformer LI, a primary capacitor Cl on the side of the transformer LI, and a secondary circuit comprising a series connection of the secondary winding of the transformer, a capacitor C2, a resistor R2 and a diode D1.
- the cathode of the diode Dl is connected to the gate terminal of the switch Sl.
- In parallel to this series connection is a Output resistance R4 switched.
- a transistor T connected in series with a resistor R3 is also arranged in parallel with the series circuit.
- the intermediate circuit 6 is optional and can be omitted. However, the potential separation then falls away.
- a load circuit 13 is connected, which has a series resonant circuit 3 and the lighting means 4.
- the series resonant circuit 3 consists of a first capacitor C3, a coil L2, and a second capacitor C4.
- the first capacitor C3 is a coupling capacitor, which connects the load circuit 13 capacitively to the node of the inverter 2.
- the coil L2 and the second capacitor C4 are respectively
- Resonant inductance and the resonant capacitor of the resonant circuit 3 The discharge path of the lamp 4 is connected in parallel with the resonant capacitor C4.
- the resonant output circuit series resonant circuit 3 or load circuit 13 may also have additional electrical components or alternative interconnections. With the resonant series resonant circuit 3 at least one light source 4, in particular at least one gas discharge lamp is operated.
- two terminals 7, 8 are provided for a first coil or heating coil of the luminous means 4, and two terminals 9, 10 for a second coil or heating coil of the luminous means 4.
- the first or upper or higher potential coil is connected at the connection point between the resonance inductor L2 and the resonance capacitor C4.
- the second or lower or potential-lower coil is connected to ground.
- a series circuit of a coil L3, L4 and a capacitor C5, C6 is arranged in each case.
- the lower heating coil or the connection 9 for the lower heating coil is connected via a voltage divider to a second voltage Vdd.
- the voltage divider is formed by connecting two resistors R1, R6 in series between the second voltage Vdd and the terminal 9.
- connection point between these two resistors Rl, R6 is connected to the first terminal 11 for controlling the higher-potential switch Sl.
- this connection point may be connected to the second connection 12 of the control unit 5 for controlling the potential-low switch S2.
- a DC path or a DC path 14 is formed via the lower coil of the luminous means 4 and the resistors R6, Rl mounted between the terminals 9, 10.
- This DC path 14 (or DC detection path 14 called) can be detected whether a bulb failure or a fault condition exists.
- a lamp failure can e.g. consist in that there is a spiral break, that the light source has not been used, or that the light source has been removed.
- a detection of the heating wire or of the type of light-emitting device can also be carried out in order to obtain from it, e.g. to be set operating parameters preferably via a corresponding stored in the control unit 5 calibration table. It can, as already described, be recognized whether ever a light source 4 is used. Alternatively, it can also be recognized whether a lighting device has been newly inserted or exchanged, e.g. if the level at terminal 11 has changed from an earlier time.
- an ASIC 5 can drive both the high level Sl and the low level switch S2 of a half-bridge inverter 2, which supplies the load circuit 13 with the gas discharge lamp 4.
- the number of required pins 11, 12 of the ASIC 5 can be reduced.
- a single pin 11 of the ASIC 5 is used both for detecting the lamp 4 used and for driving the high-level switch Sldes half-bridge inverter 2.
- this pin 11 of the ASIC 5 can be detected whether a lamp 4 is used with a coil or not, especially since the voltage at this pin depends on the inserted coil or not.
- the detection of the coil used is preferably carried out in a so-called standby state in which the half-bridge 2 is not clocked.
- a DC path 14 is connected to the filament of the gas discharge lamp 4.
- a combination of the low level switch S2 of the inverter 2 with a DC detection path for an inserted lamp 4 is basically also possible, but does not have the advantages of, for example, the galvanic isolation, which is usually present at the high level switch Sl.
- a measuring resistor 15, shown in phantom in FIG. 1, may be provided between ground and low-level switch S2. It is then advantageous, the DC detection path 14 at the terminal 11 for the high level switch
- the ASIC 5 may, of course, in addition to the two pins 11, 12 shown in Fig. 1 (output signal low level switch, output signal high-level switch combined with DC detection path for the lamp) have more pins. Of primary importance for the invention is that the function "lamp present" is combined with “high-level drive” at one pin of the ASIC 5.
- the DC detection path 14 can not be performed as shown in Fig. 1 on the potential-low coil, but also on the potential higher coil, or even on both.
- the voltage Vdd can be generated internally in the ASIC 5, for example.
- a power source may be internally connected to the detection pin 11 (in the standby state) so that the DC current flows only when the coil is present.
- the common denominator of both embodiments is that the coil used forms part of a DC path 14 toward the sense pin 11.
- the ASIC 5 preferably has at least one further pin, in order to be supplied with a not yet started half-bridge 2 via a start-up circuit with a resistor also from the mains voltage.
- the ASIC 5 is then preferably supplied from the midpoint voltage of the half-bridge inverter 2.
- the detection of the presence of the coil or the generation of the output signal for the high-level switch Sl takes place in time-separated periods.
- the period for detecting the presence of the coil is the period in which the half-bridge 2 is not operated. This embodiment is particularly advantageous if the period of time that remains when the half bridge 2 is actively operated and the high level switch S1 is not switched on may be too short for detection.
- the control unit is in particular designed to transmit control signals with a level of e.g. 13V and measuring signals with a low level of e.g. 3.3V to receive.
- the invention can also be used for drivers for LEDs.
- a resonant half-bridge converter can be used.
- a terminal detection can be done or information about the LED can be read.
- a coding element can be arranged parallel to the LED.
- the coding element can be formed by a resistor or DIP switch. The value of the resistor or the set combination of the DIP switch can thus be read out as information such as binning, Nominalstrom- or color information on the LED.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011089838 | 2011-12-23 | ||
| DE102012204118A DE102012204118A1 (de) | 2011-12-23 | 2012-03-15 | Betrieb von Leuchtmitteln |
| PCT/EP2012/075948 WO2013092586A2 (de) | 2011-12-23 | 2012-12-18 | Betrieb von leuchtmitteln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2796011A2 true EP2796011A2 (de) | 2014-10-29 |
| EP2796011B1 EP2796011B1 (de) | 2018-06-13 |
Family
ID=48575797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12818498.3A Active EP2796011B1 (de) | 2011-12-23 | 2012-12-18 | Betrieb von leuchtmitteln |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2796011B1 (de) |
| CN (1) | CN104012181B (de) |
| DE (1) | DE102012204118A1 (de) |
| WO (1) | WO2013092586A2 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108917924A (zh) * | 2018-05-12 | 2018-11-30 | 宁波馨颢净水设备有限公司 | Uv紫外线检测与计时电子镇流器 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3329929B2 (ja) * | 1994-02-15 | 2002-09-30 | 松下電工株式会社 | 高圧放電灯点灯装置 |
| US5770925A (en) * | 1997-05-30 | 1998-06-23 | Motorola Inc. | Electronic ballast with inverter protection and relamping circuits |
| JP4314715B2 (ja) * | 2000-02-29 | 2009-08-19 | パナソニック電工株式会社 | 放電灯点灯装置 |
| CN2490787Y (zh) * | 2001-07-18 | 2002-05-08 | 张洪生 | 高性能电子镇流器 |
| CN2817288Y (zh) * | 2005-08-15 | 2006-09-13 | 袁荣荣 | 一种高强度气体放电灯电子镇流器 |
| EP1776000A3 (de) * | 2005-10-12 | 2008-05-28 | Int Rectifier Corp | 8-beinige integrierte Schaltung für ein Vorschaltgerät mit Leistungsfaktorkorrektur |
| US7557515B2 (en) * | 2006-06-28 | 2009-07-07 | International Rectifier Corporation | Simplified ballast control circuit |
| US7312588B1 (en) * | 2006-09-15 | 2007-12-25 | Osram Sylvania, Inc. | Ballast with frequency-diagnostic lamp fault protection circuit |
| JP2008270095A (ja) * | 2007-04-24 | 2008-11-06 | Matsushita Electric Works Ltd | 放電灯点灯装置及び照明器具及び照明システム |
| TW200930153A (en) * | 2007-12-21 | 2009-07-01 | Chuan Shih Ind Co Ltd | Dimming circuit of a discharge lamp |
-
2012
- 2012-03-15 DE DE102012204118A patent/DE102012204118A1/de not_active Withdrawn
- 2012-12-18 CN CN201280063952.7A patent/CN104012181B/zh not_active Expired - Fee Related
- 2012-12-18 WO PCT/EP2012/075948 patent/WO2013092586A2/de not_active Ceased
- 2012-12-18 EP EP12818498.3A patent/EP2796011B1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013092586A2 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104012181B (zh) | 2016-10-12 |
| EP2796011B1 (de) | 2018-06-13 |
| CN104012181A (zh) | 2014-08-27 |
| WO2013092586A2 (de) | 2013-06-27 |
| WO2013092586A3 (de) | 2013-08-15 |
| DE102012204118A1 (de) | 2013-06-27 |
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