EP4096366A1 - Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals - Google Patents

Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals Download PDF

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Publication number
EP4096366A1
EP4096366A1 EP21175610.1A EP21175610A EP4096366A1 EP 4096366 A1 EP4096366 A1 EP 4096366A1 EP 21175610 A EP21175610 A EP 21175610A EP 4096366 A1 EP4096366 A1 EP 4096366A1
Authority
EP
European Patent Office
Prior art keywords
control device
lighting control
switch
field bus
bus
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.)
Pending
Application number
EP21175610.1A
Other languages
English (en)
French (fr)
Inventor
Markus Künzli
Roger Kistler
Frank Horn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and 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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Priority to EP21175610.1A priority Critical patent/EP4096366A1/de
Priority to PCT/EP2022/063083 priority patent/WO2022248256A1/en
Publication of EP4096366A1 publication Critical patent/EP4096366A1/de
Pending legal-status Critical Current

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    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • H05B47/183—Controlling the light source by remote control via data-bus transmission using digital addressable lighting interface [DALI] communication protocols

Definitions

  • the present disclosure relates to lighting control, and in particular, to a lighting control device powered by a field bus, and an LED driver, and a luminaire comprising the lighting control device.
  • field buses may be deployed to handle network communication as well as energy supply.
  • DALI Digital Addressable Lighting Interface
  • infrared communication may be limited in terms of the maximum LED current used to light an infrared LED.
  • the object of the present disclosure is thus to improve the energy supply of the networked devices of a field bus.
  • a first aspect of the present disclosure relates to a lighting control device, comprising a transmitter unit connectable to a field bus, and configured to conduct a wireline transmission of the lighting control device on the field bus by intermittently applying a logic low signal level to the field bus, wherein the logic low signal level comprises a positive voltage.
  • the lighting control device is configured for power intake off the field bus when the positive voltage is present on the field bus.
  • the positive voltage may comprise a maximum voltage specified for the transmitter unit when applying the logic low signal level to the field bus.
  • the transmitter unit may comprise a load and a first switch connected in series between a conductor pair of the field bus.
  • the lighting control device may be configured to switch the first switch into its conductive state to apply the logic low signal level dropping across the load to the field bus.
  • the load may comprise a resistor.
  • the transmitter unit may further comprise a second switch connected between the conductor pair of the field bus.
  • the lighting control device may further be configured to switch the second switch into its conductive state to short-circuit the conductor pair of the field bus.
  • the lighting control device may further be configured to intermittently switch the second switch into its conductive state when the first switch is in its conducting state.
  • the transmitter unit may further comprise a wireless communication unit and a third switch connected in series between the conductor pair of the field bus.
  • the lighting control device may further be configured to intermittently switch the third switch into its conductive state to conduct a wireless transmission of the lighting control device via the wireless communication unit.
  • the transmitter unit may further comprise a fourth switch connected between the conductor pair of the field bus.
  • the lighting control device may further be configured to alternatingly switch the third switch and the fourth switch into their respective conductive states following a modulation frequency of the wireless communication unit.
  • the wireless communication unit may comprise an infrared light-emitting diode, LED.
  • the lighting control device may further comprise an energy storage unit configured for the power intake off the field bus.
  • the energy storage unit may comprise a capacitor.
  • the transmitter unit may comprise a DALI transmitter unit, and the field bus may comprise a DALI bus.
  • a second aspect of the present disclosure relates to an LED driver, comprising a lighting control device according to the first aspect or any of its implementations, and a converter configured to power LED lighting means connectable to the LED driver via output terminals of the LED driver.
  • a third aspect of the present disclosure relates to a luminaire, comprising an LED driver according to the second aspect, and LED lighting means connected to output terminals of the LED driver.
  • the present disclosure improves an energy supply of the networked devices of a field bus by enabling an energy supply of the networked devices during periods when the logic low signal level is present on the field bus, in addition to those periods when the field bus carries the logic high signal level.
  • Infrared communication has a current demand that may exhaust the energy supply capacity of a field bus,
  • a DALI bus system may be supplied with a maximum current of 250mA for the devices in the system, which ultimately limits the infrared LED current.
  • a transmitter unit of a lighting control device and a networked device comprising the lighting control device may be dimensioned by a lower quiescent current in those periods when the field bus carries the logic high signal level. This enables supplying more networked devices connected to the field bus and simplifying the powering of the field bus.
  • FIG. 1 illustrates a luminaire 1 and an LED driver 2 under the present disclosure.
  • the luminaire 1 comprises an LED driver 2 and LED lighting means 3 which are connectable to the LED driver 2 via output terminals of the LED driver 2.
  • Input terminals of the luminaire 1 of FIG. 1 are connected to a field bus 6 which is mainly powered via an AC/DC converter 7.
  • the field bus 6 may comprise a DALI bus.
  • the LED driver 2 comprises a converter 5 configured to power the aforementioned LED lighting means 3 and a lighting control device 4 under the present disclosure.
  • FIG. 2 illustrates a lighting control device 4 under the present disclosure.
  • the lighting control device 4 comprises a transmitter unit 41, a receiver unit 42, and a control unit 43 such as a microcontroller or a microprocessor.
  • the transmitter unit 41 is connectable to the field bus 6. Any such connectivity of the transmitter unit 41 applies to the receiver unit 42 likewise. In particular.
  • the transmitter unit 41 may comprise a DALI transmitter unit and is configured to conduct a wireline transmission of the lighting control device 4 on the field bus 6 by intermittently applying a logic low signal level to the field bus 6.
  • the logic low signal level comprises a positive voltage.
  • the positive voltage may comprise a maximum voltage specified for the transmitter unit 41 when applying the logic low signal level to the field bus 6.
  • the positive voltage may comprise a voltage up to +4,5 V in the case of a transmitter unit 41 for a DALI bus. This logic low signal level maintains a margin to the maximum voltage of +6,5 V of the logic low signal level specified for the communication on a DALI bus.
  • the lighting control device 4 is configured for power intake off the field bus 6 when the positive voltage is present on the field bus 6.
  • a power intake of the lighting control device 4 may amount up to 250 mA (maximum system current, implying no other networked devices consuming significant currents) times +4,5 V (the maximum positive voltage specified for DALI transmitters when applying the logic low signal level to the field bus).
  • the lighting control device 4 may further comprise an energy storage unit (not shown) configured for the power intake off (i.e., from) the field bus 6.
  • the energy storage unit may comprise a capacitor.
  • the capacitor may be dimensioned following a quiescent current that takes account of an energy supply of the lighting control device 4 during periods when the logic low signal level is present on the field bus, in addition to those periods when the field bus carries the logic high signal level.
  • FIG. 3 illustrates a first implementation of the transmitter unit 41 under the present disclosure.
  • the transmitter unit 41 may comprise a load 411, which may include a resistor and a first switch 412 connected in series between a conductor pair of the field bus 6.
  • the conductor pair may further connect the receiver unit 42 to the field bus 6 following the lighting control device 4 of FIG. 2 .
  • the lighting control device 4 in particular its control unit 43, may be configured to switch the first switch 412 into its conductive state to apply the logic low signal level dropping across the load 411 to the field bus 6, by applying an appropriate control signal 413.
  • the load may be designed to exhibit a voltage drop between its terminals that corresponds to the logic low signal level and in particular amounts to the positive voltage of up to + 4,5 V mentioned above for a load current of 250 mA (maximum system current). This maximizes the power intake capacity of the lighting control device 4.
  • FIG. 4 illustrates the bus voltage V BUS over time t following the transmitter unit 41 of FIG. 3 .
  • FIG. 3 further indicates shaded portions, one for the logic high signal level recognized between +22,5 V and +9,5 V, and another one for the logic low signal level recognized identified between - 6,5 V and +6,5 V, as specified for DALI bus communication.
  • An exemplary signal curve of the control signal 413 is shown at a top of FIG. 4 .
  • the first switch 412 is switched into its conductive state when the control signal corresponds to a logic high signal.
  • the bus voltage V BUS drops from a quiescent voltage of +16 V applied between the conductor pair which will be recognized as the logic high signal level to a lower value which will be recognized as the logic low signal level.
  • the load current may amount up to the maximum system current of 250 mA, and depending on a dimensioning of the load 411 a particular voltage may drop across the load 411.
  • the load 411 may be dimensioned such that a target value of +4,5 V for the voltage drop across the load 411 is achieved.
  • the bus voltage V BUS is clamped to +4,5 V whenever the first switch 412 is in its conductive state.
  • This positive voltage is still recognized as the logic low signal level and thus does not adversely affect the communication on the field bus 6.
  • the lighting control device 4 is enabled for the power intake.
  • the positive voltage may be present at the field bus 6 due to transmissions of any lighting control device 4 connected to the field bus 6. Accordingly, the power intake by a particular lighting control device 4 is enabled no matter which one of the lighting control devices 4 performs a transmission.
  • FIGs. 5 and 6 illustrate second and third implementations of the transmitter unit 41 under the present disclosure.
  • the transmitter units 41 of FIG. 5 and 6 may further comprise a second switch 414.
  • the second switch 414 is connected between the conductor pair of the field bus 6, in parallel to the series connection of the load 411 and the first switch 412 introduced in FIG. 3 .
  • the second switch 414 is connected in parallel to the load 411 only.
  • the lighting control device 4 may further be configured to switch the second switch 414 into its conductive state to short-circuit the conductor pair of the field bus 6, by applying an appropriate control signal 415A/B
  • the lighting control device 4 may further be configured to intermittently switch the second switch 414 into its conductive state when the first switch 412 is in its conducting state.
  • FIG. 7 illustrates the bus voltage V BUS over time t following the transmitter units 41 of FIGs. 5 and 6 .
  • control signal 415A/B An exemplary signal curve of the control signal 415A/B is shown at a top of FIG. 7 .
  • the control signal 415A/B is modulated with a frequency higher than the frequency with which the communication on the field bus 6 is modulated. For example, an integer multiple may be used.
  • the bus voltage V BUS is clamped to 0 V whenever both the first switch 412 and the second switch 414 are in their conductive states.
  • said control signal 415A/B may require taking measures for not adversely affecting those periods when the logic high signal level is applied to the field bus 6. This is indicated by the dotted sections of the signal curve representing the control signal 415A/B in FIG. 7 .
  • the resulting zero bus voltage is still recognized as the logic low signal level and thus does not adversely affect the communication on the field bus 6.
  • the positive voltage e.g., +4,5 V
  • the lighting control device 4 is enabled for the power intake.
  • FIG. 8 illustrates a fourth implementation of the transmitter unit 41 under the present disclosure.
  • the transmitter unit 41 of FIG. 8 may augment any of the transmitter units 41 mentioned above.
  • Said transmitter units 41 may thus further comprise a wireless communication unit 416 and a third switch 417 connected in series between the conductor pair of the field bus 6.
  • the wireless communication unit 416 may comprise an infrared light-emitting diode, LED.
  • the lighting control device 4 may further be configured to intermittently switch the third switch 417 into its conductive state to conduct a wireless transmission of the lighting control device 4 via the wireless communication unit 416, by applying an appropriate control signal 418.
  • the transmitter unit 41 may further comprise a fourth switch 419 connected between the conductor pair of the field bus 6, in parallel to the series connection of the wireless communication unit 416 and a third switch 417.
  • the lighting control device 4 may further be configured to alternatingly switch the third switch 417 and the fourth switch 419 into their respective conductive states following a modulation frequency of the wireless communication unit 416, by applying appropriate control signals 418, 420.
  • the control signals 418, 420 complement one another in terms of their logic signal levels.
  • FIG. 9 illustrates the bus voltage V BUS over time t following the transmitter unit 41 of FIG. 8 .
  • Exemplary signal curves of the control signals 418, 420 are shown at a top of FIG. 9 .
  • the control signals 418, 420 are modulated with a frequency much higher than the frequency with which the communication on the field bus 6 is modulated.
  • a modulation frequency of 36 kHz may be used.
  • the respective switch 417, 419 is switched into its conductive state when the respective control signal 418, 420 corresponds to a logic low signal level of +4,5 V.
  • the switches 417 and 419 take turns in switching into their conductive states when the positive voltage of +4,5 V is present at the field bus 6.
  • the wireless communication unit 416 is provided with a current and thus enabled to conduct a wireless transmission of the lighting control device 4.
  • the bus voltage V BUS is clamped to about 0 V whenever one of the switches 417, 419 is in its conductive states. This is indicated by the dotted sections of the curve representing the bus voltage V BUS in FIG. 9 .
  • the bus voltage V BUS of about 0 V assumes that the wireless communication unit 416 exhibits only a negligible voltage drop when conducting the current just mentioned.
  • Said control signals 418, 420 may require taking measures for not adversely affecting those periods when the logic high signal level is applied to the field bus 6. This is indicated by the intermittent modulation of the signal curves representing the control signals 418, 420 in FIG. 9 .
  • the resulting voltage of about 0 V is still recognized as the logic low signal level and thus does not necessarily affect the communication on the field bus 6 adversely. That is to say, the wireless transmission using the wireless communication unit 416 may simply copy the wireline transmission via the field bus 6. Alternatively, the wireless transmission using the wireless communication unit 416 may be used independently of the communication protocol of the wireline transmission on the field bus 6. In this case, other lighting control units 4 connected to the field bus 6 and receiving the copy of the wireless transmission via the field bus 6 need to be able to recognized and discard incorrect transmissions.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP21175610.1A 2021-05-25 2021-05-25 Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals Pending EP4096366A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21175610.1A EP4096366A1 (de) 2021-05-25 2021-05-25 Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals
PCT/EP2022/063083 WO2022248256A1 (en) 2021-05-25 2022-05-13 Powering by a fieldbus during logic low signal level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21175610.1A EP4096366A1 (de) 2021-05-25 2021-05-25 Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals

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EP4096366A1 true EP4096366A1 (de) 2022-11-30

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EP21175610.1A Pending EP4096366A1 (de) 2021-05-25 2021-05-25 Speisung durch einen feldbus während eines niedrigen pegels eines logischen signals

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EP (1) EP4096366A1 (de)
WO (1) WO2022248256A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150091383A1 (en) * 2011-02-17 2015-04-02 David Schmucki Combined sensor/emergency light unit for a lightng system
WO2020069980A1 (en) * 2018-10-02 2020-04-09 Signify Holding B.V. A digital addressable lighting interface, dali, enabled communication device for transmitting messages over a communication bus, as well as a corresponding method
US20200119947A1 (en) * 2017-04-10 2020-04-16 Signify Holding B.V. System and method for enhancing data rates over addressable lighting networks
WO2021043601A1 (en) * 2019-09-06 2021-03-11 Signify Holding B.V. A power supply device, a power receiving device and power supply and receipt methods

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150091383A1 (en) * 2011-02-17 2015-04-02 David Schmucki Combined sensor/emergency light unit for a lightng system
US20200119947A1 (en) * 2017-04-10 2020-04-16 Signify Holding B.V. System and method for enhancing data rates over addressable lighting networks
WO2020069980A1 (en) * 2018-10-02 2020-04-09 Signify Holding B.V. A digital addressable lighting interface, dali, enabled communication device for transmitting messages over a communication bus, as well as a corresponding method
WO2021043601A1 (en) * 2019-09-06 2021-03-11 Signify Holding B.V. A power supply device, a power receiving device and power supply and receipt methods

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