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WO2017089755A1 - Luminaire à del et alimentation électrique de secours associée - Google Patents

Luminaire à del et alimentation électrique de secours associée Download PDF

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Publication number
WO2017089755A1
WO2017089755A1 PCT/GB2016/053636 GB2016053636W WO2017089755A1 WO 2017089755 A1 WO2017089755 A1 WO 2017089755A1 GB 2016053636 W GB2016053636 W GB 2016053636W WO 2017089755 A1 WO2017089755 A1 WO 2017089755A1
Authority
WO
WIPO (PCT)
Prior art keywords
converter
power supply
module
light fitting
leds
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.)
Ceased
Application number
PCT/GB2016/053636
Other languages
English (en)
Inventor
Mohamed HANSLOD
SakilBabu KOLA
Peter Horton
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2017089755A1 publication Critical patent/WO2017089755A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J9/065—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads for lighting purposes
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/357—Driver circuits specially adapted for retrofit LED light sources
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/345—Current stabilisation; Maintaining constant current

Definitions

  • the present invention relates to emergency lighting, and particularly to backup power supplies for converting standard light fittings into emergency light fittings.
  • Emergency light fittings are fitted with a battery to provide a backup power supply to the light fitting during a mains power outage.
  • the battery is charged by the mains power when available, and once power is lost the battery is typically required to power the light fitting for an extended period of time, such as several hours.
  • Manufacturers often make light fitting designs available in both emergency lighting and standard formats, i.e. with or without a backup power supply.
  • backup power supplies may be retrofitted onto standard light fittings so that they too can function as emergency lighting. This allows architects and interior designers greater flexibility when selecting light fittings for public and commercial buildings.
  • a backup power supply module for an LED light fitting
  • the module comprising an AC-DC converter, a DC-DC converter, a battery, a controller, sensing means arranged to detect whether there is a power supply to the AC-DC converter, and switching means for switching the module between a passive state and an active state, wherein the module is arranged to switch from the passive state to the active state in the event that power supply to the AC- DC converter is lost, and wherein: when the module is in the passive state, the AC-DC converter is arranged to charge the battery and to power the controller, and the DC-DC converter is disconnected from one or both of the battery and the LEDs of a light fitting; and when the module is in the active state, the battery is arranged to power the controller and to supply power to the LEDs of a light fitting via the DC-DC converter, and the controller controls the DC-DC converter to supply a substantially constant current to the LEDs of the light fitting.
  • the module is arranged so that while the module is in its active state, the AC-DC converter is disconnected from the battery.
  • the switching means may comprise a single switch arranged to connect the battery to the AC-DC converter when the module is in its passive state only and to the DC-DC converter when the module is in its active state only.
  • the module may comprise terminals for connection of a further AC-DC converter, may be arranged to connect the further AC-DC converter to the LEDs of the light fitting when the module is in the passive state, and may be arranged to disconnect the further AC-DC converter from the LEDs of the light fitting when the module is in the active state.
  • the switching means may comprise a single switch arranged to connect the LEDs of the light fitting to the further AC-DC converter when the module is in the passive state only and to the DC-DC converter when the module is in the active state only.
  • the module may comprise terminals for connection of the LEDs of the light fitting, wherein said LED terminals are located adjacent to the terminals for connection of the further AC-DC converter, such as within a few centimetres or millimetres of one another.
  • the DC-DC converter may comprise a boost converter, and may be controlled by the controller via pulse-width modulation.
  • the module may comprise a current sensor arranged to provide a signal to the controller representing an input or output current of the DC-DC converter, and the module may be arranged to provide a feedback signal to the controller representing an output voltage of the DC-DC converter.
  • an emergency light fitting comprising a backup power supply according to the first aspect of the invention.
  • the light fitting may comprise a DC power supply arranged to power the LEDs of the light fitting when the module is in the passive state.
  • the module is arranged to disconnect the DC power supply from the LEDs when the module is in the active state.
  • a method of converting an LED light fitting into an emergency light fitting comprising the steps of providing a backup power supply module according to the first aspect of the invention, connecting the LEDs of the light fitting across a first pair of terminals of the module, and connecting a DC power supply of the light fitting across a second pair of terminals of the module.
  • Figure 1 is a schematic representation of an LED emergency light fitting including a backup power supply
  • Figure 2 is a simplified circuit diagram of the backup power supply of Figure 1.
  • an LED light fitting 1 is shown in which the mains AC power supply 2 is connected to the built-in or manufacturer-supplied DC power supply unit 3 (LED PSU) that drives the LEDs 4.
  • LED PSU built-in or manufacturer-supplied DC power supply unit 3
  • These components represent a standard, nonemergency light fitting 1 before the backup power supply 10 has been retrofitted. The remainder of the components represent the backup power supply 10 retrofitted to the light fitting 1 in order to provide an emergency lighting function.
  • the AC mains 12 is connected to a voltage sensor 14 and an additional DC power supply unit 16 (DC PSU) which charges a relay 20 and feeds a battery charging circuit 30 and a voltage regulator 18.
  • the voltage regulator 18 powers the voltage sensor 14 and a microcontroller 100.
  • the microcontroller 100 receives a signal 114 from the voltage sensor 14 indicating the presence or absence of mains AC power 12 and, when a power outage is detected, triggers the switching relay 20 in response.
  • One switch 22 actuated by the relay 20 connects the battery 40 either to the charger 30 or, during a power outage, to the voltage regulator 18 that supplies the microcontroller 100 and to a boost converter 50 controlled by the microcontroller 100.
  • Another switch 24 actuated by the relay 20 connects the LEDs 4 either to the original PSU 3 or, during a power outage, to the boost converter 50.
  • the switching relay 20 when the switching relay 20 is tripped by a power outage, it simultaneously disconnects the LEDs 4 from the original PSU 3, disconnects the charger 30 from the battery 40, and connects the battery 40 to power the microcontroller 100 and, via the boost converter 50, the LEDs 4.
  • the microcontroller 100 drives the switching of the boost converter 50, controlling for feedback signals 154, 156 from the boost converter 50 indicating the output voltage and current.
  • the LEDs 4 are supplied with constant current at a desired level of current, voltage, and/or power independently of the output of the original PSU 3. For example, a typical 45W LED downlight may produce an output of around
  • the backup power supply module 10 of Figure 1 is shown in more detail in Figure 2.
  • the mains AC 12 (L, N) powers the module's internal PSU 16, which charges the battery 40 via series resistors 34, 36.
  • a control signal 130 (Charge Enable) from the microcontroller 100 is operable via transistors 31, 33 (Ql, Q3) to bypass one ofthe series resistors 34, so that the charger 30 is switchable between higher and lower (trickle) charging rates.
  • the microcontroller 100 receives a feedback signal 140 representing the battery voltage.
  • the battery voltage also powers an indicator LED 42 which can be switched on or off via a control signal 142 (EL On) from the microcontroller.
  • the microcontroller 100 can thus indicate a fault, such as by blinking the indicator LED 42.
  • the microcontroller 100 receives from the mains voltage sensor 14 (U3) a signal 114 (Mains Sense) indicating the presence or absence of the mains AC supply 12. When a mains power outage is detected, the microcontroller 100 triggers a switching relay 20 (RLla) via a control signal 120 (Relay On) to transistor 26 (Q4).
  • the relay 20 (RLla) actuates switches 22, 24 so that the backup power supply 10 is toggled between a charging state (NC) where the battery 40 is connected to the charger 30, and an operational state (NO) where the battery 40 powers the AC voltage sensor 14, the microcontroller 100, and the LEDs 4 of the lighting unit 1.
  • the LED lighting 1 While in the charging state (NC), one of the relay switches 24 connects the LEDs 4 to the lighting unit' s original/built-in DC power supply unit 3 (PSU IN), bypassing the backup power supply module 10.
  • PSU IN original/built-in DC power supply unit 3
  • the LED lighting 1 operates as if the backup power supply 10 had not been installed, so that the circuitry supplying power to the LEDs 4 is effectively unmodified relative to the default configuration provided by the manufacturer.
  • the backup power supply 10 is not required to power the LEDs 4 at a level suitable for normal use. Rather, its design can be optimised purely to provide the low- level lighting output required for emergency lighting.
  • the relay switches 22, 24 connect the battery 40 to the LEDs 4 of the lighting unit 1 via a boost converter 50.
  • the microcontroller 100 supplies a pulse-width modulated (PWM) control signal 152 (MOSFET Drive) to the transistor 52 (Q5) that modulates the boost converter 50.
  • PWM pulse-width modulated
  • MOSFET Drive MOSFET Drive
  • the PWM switching frequency and the various resistances, capacitances, and inductances of the boost converter 50 are selected to provide a constant-current power supply to the LEDs 4.
  • the microcontroller 100 receives feedback signals 154, 156 (V Feedback, I Load) via a potential divider 54 and current sensor 56 (U2) respectively, representing the output voltage and current of the boost converter 50. While the backup power supply 10 is in its operational state (NO), the PWM is controlled so as to maintain a predefined level of output current, regardless of the depleting battery voltage and regardless of the variable voltage drop across the LEDs 4. In certain embodiments, the microcontroller 100 and boost converter 50 are arranged to provide a single, fixed level of output current.
  • a single backup power supply module has been developed that is compatible with LED lighting panels rated from 9W to 60W and with LEDs rated from 10V to 42V.
  • the backup power supply module is provided with several different output currents, either as several individual models or as easily selectable current settings on a single model, a very limited number of current output options may provide a retrofit backup power supply suitable for almost all LED light fitting types, across a much wider range of power ratings and LED voltages.
  • the LEDs are directly powered by the battery, with no power supplied to either PSU or to an inverter, unlike many conventional retrofitted backup power supplies. This provides a very substantial improvement in efficiency and battery life for a given battery size when compared with conventional inverter-based retrofit emergency power supplies. It also allows the provision of a significantly smaller, lighter, and less expensive backup power supply module when compared with conventional inverter-based retrofit emergency power supplies.
  • Installation of the backup power supply module is extremely simple, as it merely needs to be connected between the LED lighting circuit and its original/built-in DC power supply unit. Since the retrofit module according to the invention does not interact in any way with the original PSU, other than simply to connect and disconnect it with the LEDs, there is no need to support multiple types of PSU. This avoids the need for additional components, wiring, and interconnecting fittings typically required to safely connect a retrofit power supply unit to multiple types of PSU and to match its power requirements.
  • Emergency lighting can be categorised as 'maintained' or 'non-maintained' types.
  • Maintained emergency lighting is operable as a normal light fitting while mains power is available; non-maintained lighting is arranged for emergency use only, such as to illuminate fire escapes.
  • the backup power supply is equally usable for converting standard light fittings into non-maintained emergency lighting. In that case, the backup power supply module may optionally replace the original/built-in power supply rather than bypassing it.
  • the microcontroller comprises a data connection (not shown) that allows it to transmit its status and input signals to a remote device, and/or to allow its control signals to be remotely controlled, via a wired or wireless connection.
  • a building may comprise a central computer that monitors the battery level of each emergency light fitting unit and is centrally operable to remotely enable and disable battery charging, or to boost and restrict the battery charging rate, in each lighting unit.
  • the data connection may transmit information to a remote device, such as the presence or absence of mains AC supply, and the output voltage and/or current during emergency operation or safety testing.
  • Such modules may, for example, be used to remotely diagnose faults with the battery, charger, or output and to disable or enable the emergency lighting capabilities of individual units so that spare units can be remotely swapped in or out.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

L'invention concerne un module d'alimentation de secours pour luminaire à DEL, qui comprend un convertisseur CA-CC (16), un convertisseur CC-CC (50), une batterie (40), un organe de commande (100), un moyen de détection (14, 114) agencé pour détecter si le convertisseur CA-CC (16) est alimenté, et des moyens de commutation (20, 22, 24) pour commuter le module entre un état passif et un état actif. Le module commute de l'état passif à l'état actif si l'alimentation du convertisseur CA-CC (16) est perdue. En mode passif, le convertisseur CA-CC (16) charge la batterie (40) et alimente le dispositif de commande (100), et le convertisseur CC-CC (50) est débranché de la batterie (40) et/ou des DEL (4) d'un luminaire (1). Dans l'état actif, la batterie (40) alimente le dispositif de commande (100), et alimente les DEL (4) par le biais du convertisseur CC-CC (50); et le dispositif de commande (100) actionne le convertisseur CC-CC (50) afin que celui-ci fournisse un courant sensiblement constant aux DEL (4).
PCT/GB2016/053636 2015-11-23 2016-11-22 Luminaire à del et alimentation électrique de secours associée Ceased WO2017089755A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1520666.7A GB2544562A (en) 2015-11-23 2015-11-23 LED light fitting and emergency power supply therefor
GB1520666.7 2015-11-23

Publications (1)

Publication Number Publication Date
WO2017089755A1 true WO2017089755A1 (fr) 2017-06-01

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PCT/GB2016/053636 Ceased WO2017089755A1 (fr) 2015-11-23 2016-11-22 Luminaire à del et alimentation électrique de secours associée

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GB (1) GB2544562A (fr)
WO (1) WO2017089755A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112888115A (zh) * 2021-01-15 2021-06-01 赣州市正途科技有限公司 一种自动更换电源的人工智能灯光电路

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2562739B (en) * 2017-05-22 2022-01-26 Tridonic Gmbh & Co Kg Fast closed loop system using microcontroller
DE202017104950U1 (de) * 2017-08-17 2018-11-20 Tridonic Gmbh & Co Kg Energieeffiziente Notlicht-LED-Treibervorrichtung und Beleuchtungseinrichtung

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US20120104858A1 (en) * 2009-06-05 2012-05-03 Polynom Ag Electronic circuit for converting a mains-operated luminaire into an emergency luminaire
US20120326614A1 (en) * 2011-06-27 2012-12-27 Toshiba Lighting & Technology Corporation Luminaire
WO2013001548A1 (fr) * 2011-06-30 2013-01-03 Schneider Electric Industries Sas Alimentation double à découpage destinée à un système d'éclairage modulaire
US20140139122A1 (en) * 2012-11-19 2014-05-22 Integrated Illumination Systems, Inc. Systems and methods for multi-state power management
US20150015076A1 (en) * 2012-02-06 2015-01-15 Seonghoon Park Charging system and power failure device detecting power failure of led light
US20150021988A1 (en) * 2013-07-20 2015-01-22 Lunera Lighting, Inc. Hybrid Power Architecture for Controlling a Lighting System
US20150214785A1 (en) * 2012-08-21 2015-07-30 Tridonic Uk Ltd Emergency lighting device

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US6081104A (en) * 1998-11-20 2000-06-27 Applied Power Corporation Method and apparatus for providing energy to a lighting system
US6356024B1 (en) * 2000-12-18 2002-03-12 Chun Ting Lin Lighting device for normal and emergent use
JPWO2013114764A1 (ja) * 2012-01-31 2015-05-11 パナソニックＩｐマネジメント株式会社 給電システム
GB2499016B (en) * 2012-02-03 2016-08-03 Tridonic Uk Ltd Lighting power supply
GB201204106D0 (en) * 2012-03-08 2012-04-18 Tridonic Uk Ltd Lamp unit power supply system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120104858A1 (en) * 2009-06-05 2012-05-03 Polynom Ag Electronic circuit for converting a mains-operated luminaire into an emergency luminaire
US20120326614A1 (en) * 2011-06-27 2012-12-27 Toshiba Lighting & Technology Corporation Luminaire
WO2013001548A1 (fr) * 2011-06-30 2013-01-03 Schneider Electric Industries Sas Alimentation double à découpage destinée à un système d'éclairage modulaire
US20150015076A1 (en) * 2012-02-06 2015-01-15 Seonghoon Park Charging system and power failure device detecting power failure of led light
US20150214785A1 (en) * 2012-08-21 2015-07-30 Tridonic Uk Ltd Emergency lighting device
US20140139122A1 (en) * 2012-11-19 2014-05-22 Integrated Illumination Systems, Inc. Systems and methods for multi-state power management
US20150021988A1 (en) * 2013-07-20 2015-01-22 Lunera Lighting, Inc. Hybrid Power Architecture for Controlling a Lighting System

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112888115A (zh) * 2021-01-15 2021-06-01 赣州市正途科技有限公司 一种自动更换电源的人工智能灯光电路

Also Published As

Publication number Publication date
GB201520666D0 (en) 2016-01-06
GB2544562A (en) 2017-05-24

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