RU2756628C1 - Emergency led lighting system - Google Patents

Abstract

FIELD: lighting engineering.

SUBSTANCE: invention relates to lighting engineering, namely to the field of power supply systems and lighting control of premises, administrative, commercial, cultural, entertainment and sports buildings and structures powered by the AC network. The emergency lighting system includes a mains voltage rectifier, an emergency power supply unit, a mains voltage switch for the power supply circuit of the illuminator and the emergency power supply unit, a number of LED illuminators, each of which includes a load in the form of LEDs connected in series, a current source and a ripple voltage detector in the network connected to the load current source.

EFFECT: exclusion of an additional control wire going to each illuminator, and ensuring that minimal lighting is maintained in the event of a repeated disconnection of the supply voltage until the end of charging the standard battery.

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Description

Technology area

The invention relates to lighting engineering, in particular to the field of power supply and lighting control systems for premises, administrative, retail, cultural, entertainment and sports buildings and structures powered by an alternating current network.

Preceding level

In shopping centers and other establishments where there are large areas visited by a mass of people, it is always necessary to provide emergency lighting to prevent panic in the event of a loss of lighting. For this, usually about 5 ... 10% of the total number of illuminators have built-in accumulators, and when the mains voltage is turned off, the LEDs start to work from the accumulator. When the lighting is on, the batteries are charged from the internal charger. Such illuminators have a significant price, and their replacement is fraught with certain difficulties, since all the illuminators are at a sufficient height. In addition, if you do not carry out special wiring, then these emergency illuminators do not turn off by themselves until the battery is discharged, i.e. there is nothing to turn them off. Of course, you can put wireless control, but this leads to serious additional costs. There may also be such a situation when the mains voltage turned off, the duty lights lit up, discharged, the mains turned on, and then, for some reason, the mains turned off again, and the batteries were not charged yet, and in this case the whole room remains without light.

Known application GB 2387723, IPC H02J 9/06, published 04.16.200257, disclosing an emergency lamp power supply device that can provide lighting from a storage battery equipped with a charging circuit under normal conditions.

Known solution, which discloses a device for lighting large halls from a three-phase network. A three-phase rectifier is installed in the power cabinet and a rectified voltage of 650 V goes along a line on the ceiling. Illuminators are connected to this line, in which current sources are installed according to the SY-lighting system, which provides significantly greater efficiency than conventional current sources, however, in this patent it is not possible to preserve the lighting of the room when the voltage drops in the line (RU 2643526, IPC Н05В 37/02, published 11/22/2018).

The technical result of the claimed solution is the elimination of an additional control wire going to each illuminator and maintenance of the minimum illumination in the event of repeated disconnection of the supply voltage before the end of charging the standard battery.

Technical solution

The emergency lighting system contains a rectifier, the input of which is formed to connect to the AC network, including 3-phase, and the output is formed to connect the load, made in the form of a series of LED illuminators, each of which includes a series of LEDs with a current source. Emergency power supply unit, includes battery, charger, DC / DC converter, voltage presence sensor. Switch P1 and P2 for mains voltage is located in the power cabinet and is designed to be connected to the power supply circuit of the illuminator or to the emergency power supply unit. To achieve the specified technical result, each LED illuminator is equipped with a network ripple voltage detector, the signal from which controls the current level in the current source that feeds the LEDs. In the presence of ripples in the conductors from the bridge, the current source delivers the rated current to the LEDs, in the absence of ripples, the LED current decreases to the specified value (5 ... 10% of the nominal), information about the presence of ripples, or their absence, goes to the ripple detector from the common line feeding the illuminators.

The solution is illustrated in Fig. 1, which shows a diagram of the organization of an emergency lighting system, for example, in a SY-lighting power system for a three-phase network.

When the mains voltage is present, the switch Ш is in the position indicated in the diagram, the converter 1 does not work, the battery is charged from the charger 4, which receives power from the rectifier (points A, B), the current source 5, supplies the LEDs 6 with the rated current. When the voltage at the output of the rectifier (A, B) fails, the voltage presence sensor 7 turns on the converter 1 and switches P1 to the position so that the voltage from the converter 1 goes to the lighting network. When the voltage in the network becomes constant (since the voltage from the bridge was pulsating (~ 14 % from peak to peak), the ripple detector 8 gives a signal to the current source 5 for the normalized current decrease in the LEDs (approximately 5% of the nominal) All LEDs in the network began to glow with an intensity of 5% of the nominal luminous flux.

When a voltage appears after the bridge (A, B), the voltage sensor 7 after the bridge turns off the converter 1, switches P1 to the initial position, the charger 4 starts charging the battery 3. Ripples appear in the network, the ripple detector 8 turns on the current source 5 to the position of the normal LED current ...

It is pertinent to note that the use of the proposed solution provides the following positive effect: the possibility of dimming (switching) the current of all network illuminators, the ability to install a battery of any power and the possibility of duplicating the battery, the ability to completely disconnect the lighting network from the supply voltage (a switch on the phase network and switch P2) constructive unity of all illuminators of the lighting system, simplicity of creating several independent lighting systems, no need for a third wire in the network to completely turn off all illuminators.

Claims (1)

An emergency lighting system, which includes a rectifier powered from the mains, a battery, a charger, a DC / DC converter, a voltage presence sensor after the bridge and switches P1 ... P2 located in the power cabinet, and a series of LED illuminators, distributed over the area of the room, each of which it includes a line of LEDs and a current source, characterized in that in order to eliminate the additional control wire going to each illuminator, a ripple detector is included in each illuminator, the input of which is connected to the voltage supplying the illuminators, and the output is connected to the current source in this way that in the presence of ripples in the supply voltage, the current source delivers the rated current to the LEDs, and all the illuminators provide the rated lighting, and in the absence of ripple, when a constant voltage is supplied to the supply line from the converter, the current source goes into emergency mode, reducing the current supplying LEDs up to the set value (5 ... 10% of the nominal leg), respectively, reducing the luminous flux of the illuminators.

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