EP2438669A1 - Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours - Google Patents

Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours

Info

Publication number
EP2438669A1
EP2438669A1 EP10721285A EP10721285A EP2438669A1 EP 2438669 A1 EP2438669 A1 EP 2438669A1 EP 10721285 A EP10721285 A EP 10721285A EP 10721285 A EP10721285 A EP 10721285A EP 2438669 A1 EP2438669 A1 EP 2438669A1
Authority
EP
European Patent Office
Prior art keywords
emergency
converter
power
battery
network
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.)
Withdrawn
Application number
EP10721285A
Other languages
German (de)
English (en)
Inventor
Michel Noe
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.)
POLYNOM AG
Original Assignee
POLYNOM AG
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 POLYNOM AG filed Critical POLYNOM AG
Priority to EP10721285A priority Critical patent/EP2438669A1/fr
Publication of EP2438669A1 publication Critical patent/EP2438669A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit 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
    • H02J9/06Circuit 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
    • H02J9/062Circuit 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
    • H02J9/065Circuit 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
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20Responsive to malfunctions or to light source life; for protection
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10Controlling the light source
    • H05B47/165Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]

Definitions

  • the invention relates to the field of electronic circuits for emergency lighting, and more particularly to an electronic circuit for converting a power light into an emergency light.
  • LED light emitting diodes
  • WO 2006/030432 Al describes a lamp with an integrated battery, which is fed via a likewise integrated converter optionally from the mains (mains operation) or from the battery (emergency operation).
  • the converter circuit for mains and emergency operation is the same, and is designed for the illuminant used.
  • an electronic circuit for converting an existing power light into an emergency light with the features of claim 1, a power light according to claim 9, and a method according to claim 10.
  • the emergency light element thus has: a mains connection for a supply from an electrical network;
  • the emergency light element depending on whether a mains voltage is present or not, is operable in a network operation and an emergency operation, and further comprises: a charger for charging a battery connected to the battery connection in network operation and for detecting a network condition, an emergency converter, which is intended to work in emergency mode as a single-shot flyback converter or as a boost converter (boost converter) and thereby convert a battery voltage into a smoothed output voltage, - a changeover relay, with which the LED port in emergency with the
  • Emergency converter and in network operation with the network converter connection is connectable, and an electronic control, which is designed to monitor the network state, switching from network to emergency operation and from emergency To control network operation, and to control the emergency converter and the changeover relay, wherein the controller is designed to control the emergency power in emergency operation, the input power of the emergency converter, ie the power taken from the battery at the battery connection.
  • the power light - in its function as a power light - has the following elements: a light source, which has LEDs connected together to form an LED array,
  • a network converter which supplies this LED arrangement from a feeding network via a mains switch with the current and voltage suitable for this LED arrangement in mains operation
  • the power light has the following elements: the LED arrangement, the power converter, a rechargeable battery from which, in emergency operation, i. in the event of a power failure, the energy for the lighting is removed, an emergency lighting element having an electronic circuit;
  • the electronic circuit comprises the following elements: a charger which charges the battery in mains operation and which is designed to detect a network condition, an emergency converter which is not identical to the network converter, and which is intended to be used as an emergency in emergency mode.
  • Barrier wall or as a boost converter (boost converter) to work and thereby convert the battery voltage into a smoothed output voltage, wherein an output power supplied by the emergency converter to the LED array in emergency mode is smaller than the output power supplied by the grid converter in mains operation, and wherein an output voltage supplied by the emergency converter is greater than the on-state voltage required for the LED array
  • a change-over relay with which in emergency operation, the LED arrangement can be connected to the emergency converter and in network operation to the network converter provided for network operation, and an electronic controller which is designed to monitor the network status, the switchover from mains to emergency operation and from emergency
  • the controller To control network operation, and to control the emergency converter and the changeover relay, wherein the controller is designed, in emergency operation, the input power of the emergency converter, i. To regulate the power taken from the battery, and thus enables the use of the emergency light element in different built-up of LEDs power lights.
  • the emergency light element can thus be produced as a universal, stand-alone device, and can be installed as an additional device in an existing LED light. It is connected via at least the power converter connector and the LED connector to the existing power light.
  • the invention uses proven technologies, namely relay contacts to disconnect, and a single-ended flyback converter or boost converter to power the LED array from a battery voltage. This single-ended flyback converter or boost converter regulates the power removed from the battery, and accordingly allows use for virtually any LED array.
  • the universal substitutability of the circuit is a result of the combination of the various features of the invention: inter alia, the change-over relay allows the use of the network converter of an existing luminaire for normal operation; Although the power control of the emergency converter is more complex than in a circuit that could be used for a light emitting diode array with known parameters, but it allows the use of the circuit with virtually any light emitting diode arrangements.
  • Figure 1 shows a preferred embodiment of an electronic circuit for the conversion of a power light into an emergency light
  • FIG. 2 details of the converter used therein.
  • FIG. 1 An LED luminaire according to the prior art has a converter, in the following Network converter 1 called, and one or more built-in LED array LEDs 2 on.
  • the LED light is switched on or off by the mains voltage 3 via a switch 4.
  • an emergency light element 5 with an emergency converter 8 which can be installed in the luminaire together with a battery 6 in order to use the luminaire as an emergency luminaire.
  • the emergency light element 5 virtually any LED light or LED array 2 can be fed in emergency mode, regardless of the converter 1, which is provided for the network operation.
  • the only limitation is in the voltage of the LED array, as will be explained later in the detailed description of the emergency converter 8.
  • the emergency light element 5 is intended to be
  • to be connected to a network connection 3 to a network 3; "to be connected to a battery port A6 to a battery 6;
  • to be connected to an LED array A2 to an LED array 2 to the power supply to a; to be connected to a network 3 at a network connection A3;
  • the emergency light element 5 has the following components:
  • This charger is a conventional charger that recharges the battery 6 from the mains 3 after a power failure.
  • this charger 1 1 Preferably built this charger 1 1 as a clocked power supply to reduce the dimensions and to increase the efficiency. For such low power as a battery charge, single ended flyback converters or boost converters are best suited.
  • a signal 12 is generated which simulates the network condition. The signal is preferably a monotonically increasing function of the mains voltage, for example, proportional to the mains voltage or to the square or root of the mains voltage.
  • This converter operates as a single-shot flyback converter or as a boost converter. In the event of a power failure, the battery voltage is converted by this emergency converter 8 into a suitable output voltage for the LED array 2 13, which is equal to the LED voltage across the LED array 2. The detailed description of this converter is given below.
  • Change-over relay 9 With this relay, the LED arrangement is connected in network operation with the network converter 1 or in emergency mode with the emergency converter 8. Preferably, it implements a two-pole switching, i. There are two switches, one for the positive and one for the negative terminal of the LED array. 2
  • Isolation relay 10 This relay can be used to switch the network converter 1 of the LED light on or off.
  • the power converter 1 In emergency mode, when the LED array 2 is supplied by the emergency converter 8 from the battery, the power converter 1 is disconnected from the power supply by the isolating relay 10. This avoids that the network converter 1 tries to supply the LED array 2 after a power return. In this case, this LED array 2 may still be separated from the network converter 1 by the relay contacts of the changeover relay 9.
  • the use of the isolating relay 10 ensures that after a network return the LED arrangement 2 is first disconnected from the emergency converter 8 or connected to the network converter 1, and only then is the network converter 1 supplied again by the network 3.
  • the isolating relay 10 By using the isolating relay 10 it is also ensured that, in the event of a power failure, the network converter 1 is first disconnected from the network 3, and only then is the LED array 2 connected to the emergency converter 8. This avoids that the LED array 2 is supplied shortly before, shortly after or during the switching of the changeover relay 9 of network converter 1 and emergency converter 8.
  • a relay or a control line for transmitting a signal for switching off the network converter 1 can also be present instead of the isolating relay.
  • Control 7 This electronic control is preferably implemented by a microcontroller, or by a microprocessor or an ASIC, etc. The following tasks are preferably performed by this microcontroller:
  • the signal 12 simulating the network is measured by the microcontroller 7 and compared with a minimum value. If the signal falls below this value, the network is detected as faulty and accordingly the emergency operation is activated.
  • Control of the changeover relay 9 and the isolation relay 10 The switch from mains to emergency operation is carried out first by the disconnection of the isolation relay 10. This causes the power converter 1 on the input side is de-energized. Then a time delay is to be provided, since the network converter 1 can supply the LED arrangement 2 over its own internal capacity for a while even without a network. This time delay is typically 200ms. After this time delay, the changeover relay 9 is switched by the controller 7. Thereafter, the LED array can be powered by the emergency converter 8.
  • LED array 2 monitoring In the LED array 2, it is preferable to monitor the LED voltage 13 at a voltage divider 27 of the LED voltage and the LED current 14 through the microcontroller to detect the LED voltage
  • the LED voltage 13 could increase indefinitely, or at least to dangerous levels, if the LED array 2 is faulty or disconnected.
  • the limitation of the LED voltage 13 can be realized by the controller 7 or by a protective circuit in the emergency converter 8.
  • Control of the Emergency Converter 8 Since the emergency converter 8 operates as a single-ended flyback converter or as a boost converter, it is possible to implement the required control by means of the microcontroller 7: With a PWM generator generated internally in the microcontroller 7 Signal 15 (pulse width modulated signal), the transistor of Notkonverters 8 is controlled. A detailed description of this control is given below.
  • Monitoring the battery 6 The battery voltage 16 is measured or monitored by the microcontroller 7. With the monitoring it is checked whether the battery 6 is charged correctly in network operation. In emergency mode, ie when the battery 6 discharges, it is protected against deep discharge. This means that the emergency operation is interrupted under a certain battery voltage, eg 0.9V per cell in the case of NiCd cells, and the current withdrawn from the battery 6 is reduced to a minimum value.
  • the emergency converter 8 is controlled in emergency mode due to the measurement of the battery voltage. That is, the output current of the emergency converter 8 in FIG.
  • Dependence of the battery voltage 16 is regulated. It is also possible to control the charging process of the battery 6 with this battery voltage measurement. This is done via a signal 17, corresponding to the battery voltage which by a
  • Voltage divider 34 can be detected and the charger 1 1 can control, for example, to adjust the charging voltage and / or charging current.
  • the microcontroller 7 also controls the interface to a user.
  • a simple LED 18 is sketched in FIG. 1, which is supplied via the signal 19. It is of course possible to control other optical displays or audible warnings with the microcontroller 7, or to transmit information relating to the state of the remote element, for example via communication bus connections.
  • FIG. 2 shows an exemplary circuit for the emergency converter 8.
  • This converter works as a boost converter.
  • the converter consists mainly of the following components: a transistor 22, for example a Mosfet or a bipolar transistor, an inductor 21, a diode 23 and a capacitor 26.
  • a transistor 22 With the control signal 15 generated from the microcontroller 7, the transistor 22 is turned on or off.
  • This control signal 15 is usually constructed as a PWM signal 15 (pulse width modulated signal), since such signals can be generated with most microcontrollers.
  • PWM signal 15 pulse width modulated signal
  • the current flows into this LED array 2 only when the output voltage 13 is higher than the forward voltage of the LED array 2.
  • the output current of the emergency converter 8 then flows into the LED arrangement 2 and in the resistor 28, which serves as a shunt, and with which this current - if necessary via an amplifier 29 - can be measured as a current signal 30 from the microcontroller 7.
  • the output power of the emergency converter 8 supplied to the LED array 2 is calculated as the product of the output current times output voltage 13.
  • the input power of the emergency converter 8 supplied from the battery 6 is calculated as the product of the battery current times the battery voltage 17 ,
  • Regulation means, in particular, the regulation to a given value (as opposed to, for example, only a limitation). The following strategies are possible for this:
  • the output power is exceeded via the measurement of the output voltage 13 carried out by the resistance bridge 27 and via the measurement of the current signal 30, in accordance with FIG Output current, calculated by the microcontroller 7.
  • the input power can be calculated, since both powers differ only by the efficiency of the emergency converter 8.
  • This efficiency is of course due to the output power, the output voltage 13 - since the voltage drop in the diode 23 is constant and thus has more influence at lower output voltages 13 - and the temperature dependent. Since all influences are measured by the microcontroller 7 or can be measured, the efficiency of the emergency converter 8 can be calculated and controlled or regulated.
  • the PWM signal 15 is started via a ramp, i. slowly rising.
  • the output voltage 13 increases continuously until the current can flow into the LED array 2. As soon as this current flows, it is measured by the microcontroller 7 and the output power can be calculated. This allows the input power control via a digital control; with or without consideration of the efficiency of the emergency converter 8.
  • the input power is carried out via the measurement of the battery voltage 17 carried out by the resistance bridge 34 and via a through a Hall effect sensor 31 and an amplifier 32
  • Measurement 33 of the battery current is calculated by the microcontroller 7. The from the
  • Battery 6 power withdrawn in emergency mode can also be supplied via a shunt
  • Resistance or other measuring technology e.g. Drain voltage measurement in the on state of a Mosfet transistor to the
  • Microcontroller 7 are transmitted.
  • the PWM signal 15 is started via a ramp, ie rising slowly.
  • the output voltage 13 increases continuously until the current can flow into the LED array 2.
  • the battery power or the input power of the emergency converter 8 increases.
  • the input power control can then be done via a digital control.
  • a third preferred variant of the control all current measurements are dispensed with.
  • the converter is controlled only in the so-called discontinuous mode. This means that the maximum value for the P WM signal or the maximum energy stored in the inductance at each cycle is limited as a function of the two battery 17 and output voltages 13, so that the current after the discharge of the inductance 21 into the capacitor 26 or in the LED
  • I ma x / (U out -Ub a t). It is assumed that the forward voltage of the diode 23 is negligible. With the calculated values I max and T ab , it is possible for the microcontroller 7 to calculate the average value (I m ea n ) of the battery current, because the microcontroller 7 controls the clock frequency or its period (T). It follows: I mean (In ax / 2) • ((T on + T a b) / T). From the power taken from the battery, which is referred to as the input power of the converter 8, can thereby be calculated as I mea n 'LW
  • Microcontroller is programmed a table with PWM values. Since the input power can be calculated by these measurements, it is possible to program such a table into the microcontroller 7 in advance or during a test of the converter, for example during its commissioning. Based on the measurements of the two output 13 and
  • Battery voltages 17 are searched in the operation of the required for the control PWM value in the table of the microcontroller 7 and used for the input power control.
  • the PWM signal 15 is started via a ramp up to a very low value or is immediately set to this minimum value. Since the inductor 21 operates in the off state of the transistor 22 as a current source, the output voltage 13 increases until the current can flow into the LED array 2, even at a very low PWM value. The output voltage is then measured. On the basis of this first measurement or the battery voltage measurement, a first P WM value can be searched in the table of the microcontroller 7 and used for the input power control. Step by step, the final value needed for the input power control is searched for and used.
  • the microcontroller 7 has to calculate very little, since all calculations have been made in advance.
  • the only measurements required are voltage measurements, which are very easy to implement.
  • Protecting and Limiting the Emergency Converter 8 As protection for the transistor 22, it is possible to measure the transistor current via a shunt resistor 25 - and possibly an amplifier 24 -. As soon as this current has exceeded a maximum value, the transistor 22 is switched off by the microcontroller 7 or better by a circuit independent of the microcontroller. The current can also be transmitted via the drain voltage measurement in the on state of a Mosfet transistor. With such a measurement, a "de-saturation monitoring" of the transistor is realized in basically known manner.
  • the output voltage 13 which is dependent on the LED array 2, monitored for the following three reasons.
  • the converter is designed for a certain maximum output voltage, typically 50V. If the forward voltage of the LED array 2 is higher than this maximum output voltage, the emergency converter 8 or the emergency light element 5 is unsuitable for the planned conversion of the LED light as an emergency light. 2 If the LED assembly 2 is faulty or not connected, the
  • Output voltage 13 theoretically increase indefinitely, since the inductance 21 operates in the off state of the transistor 22 as a current source.
  • Output power is less than the intended in emergency operation input power, the output voltage 13 will rise. Also in this case is the Emergency converter 8 or the emergency light element 5 unsuitable for the planned conversion of the LED light as an emergency light.
  • the monitoring of the output voltage 13 can be realized by the microcontroller 7 itself or by a circuit independent of the microcontroller.
  • the battery 6 is selected such that its voltage 16 is smaller than the forward voltage 13 of the LED array 2. Otherwise, a current flows directly from the battery 6 through the inductor 21 and the diode 23 in the LED assembly 2, without the possibility to regulate the power.

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

L'invention concerne un circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours. Selon l'invention, l'éclairage sur secteur présente un ensemble de LED (2) et un convertisseur de secteur (1) pour son alimentation. Un élément lumineux de secours (5) muni d'un circuit électronique alimente en régime de secours l'ensemble de LED (2) à partir d'un accumulateur (6). Lors du passage en régime de secours, le circuit (5) coupe l'alimentation du convertisseur de secteur (1) et règle ensuite la puissance de sortie de l'accumulateur (6) et la puissance d'entrée de l'ensemble de LED (2).
EP10721285A 2009-06-05 2010-05-26 Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours Withdrawn EP2438669A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10721285A EP2438669A1 (fr) 2009-06-05 2010-05-26 Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09405096 2009-06-05
PCT/CH2010/000136 WO2010139080A1 (fr) 2009-06-05 2010-05-26 Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours
EP10721285A EP2438669A1 (fr) 2009-06-05 2010-05-26 Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours

Publications (1)

Publication Number Publication Date
EP2438669A1 true EP2438669A1 (fr) 2012-04-11

Family

ID=40935506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10721285A Withdrawn EP2438669A1 (fr) 2009-06-05 2010-05-26 Circuit électronique permettant de convertir un éclairage sur secteur en un éclairage de secours

Country Status (5)

Country Link
US (1) US20120104858A1 (fr)
EP (1) EP2438669A1 (fr)
JP (1) JP5575884B2 (fr)
CA (1) CA2766422C (fr)
WO (1) WO2010139080A1 (fr)

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CN105979661B (zh) * 2016-06-24 2018-03-09 浙江生辉照明有限公司 可延时照明电路及装置
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CN109982477B (zh) * 2018-04-06 2021-06-01 阿列德拉公司 具有多个驱动器的固态照明
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JP5575884B2 (ja) 2014-08-20
CA2766422A1 (fr) 2010-12-09
US20120104858A1 (en) 2012-05-03
JP2012529258A (ja) 2012-11-15
WO2010139080A1 (fr) 2010-12-09

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