JP2016073010A - Power supply device for exterior illumination - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement disaster-resistant exterior illumination with a power storage battery at low cost.SOLUTION: In a power supply device 1 for exterior illumination, an input terminal 11 receives a system voltage, an output terminal 19 is connected to a wire for supplying current to exterior illumination such as an LED lamp 3 to be driven with AC or the like. An AC-DC converter 14 converts the system voltage input from the input terminal 11 to a DC voltage and outputs the DC voltage to a power storage battery 15. A DC-AC converter 16 converts the DC voltage output from the power storage battery 15 to an AC voltage and outputs the AC voltage. A switching circuit 17 is provided between first terminals A1, A2 for outputting the system voltage input from the input terminal 11, second terminals B1, B2 for outputting the voltage of the power storage battery 15 which is converted to the AC voltage by the DC-AC converter 16, and the output terminal 19, and switches according to the system voltage whether the first terminals A1, A2 is connected to the output terminal 19 or the second terminals B1, B2 is connected to the output terminal 19.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power supply device for outdoor lighting that supplies power to outdoor lighting such as a security light.

  In recent years, for the purpose of saving energy and saving electricity charges, a movement to replace crime prevention lamps with incandescent bulbs, fluorescent lamps and mercury lamps with LED lighting has been spreading. In addition, crime prevention lamps equipped with a storage battery as a backup power source have become widespread as a power outage countermeasure at the time of disaster (see, for example, Patent Document 1).

JP 2014-158383 A

  A conventional crime prevention light equipped with a backup power source controls the switching between the system power source and the battery power source by a microcontroller, which is expensive. The finances of local governments, the main consumers of security lights, are tight in many areas, and there is a need for low-cost, disaster-resistant security lights.

  This invention is made | formed in view of such a condition, The objective is to provide the technique which implement | achieves the outdoor illumination with a storage battery which is low-cost and strong against a disaster.

  In order to solve the above-described problems, a power supply device for outdoor lighting according to an aspect of the present invention includes a storage battery, an input terminal that receives a system voltage, and an output terminal that is connected to wiring that supplies current to the AC-driven outdoor lighting. An AC-DC converter that converts the system voltage input from the input terminal into a DC voltage and outputs the DC voltage to the storage battery; and a DC-AC that converts the DC voltage output from the storage battery into an AC voltage and outputs the AC voltage A conversion unit, a first terminal that outputs a system voltage input from the input terminal, a second terminal that outputs a voltage of the storage battery converted into an AC voltage by the DC-AC conversion unit, and the output terminal A switching circuit that is provided between the first terminal and the second terminal to be connected to the output terminal according to a system voltage.

  According to the present invention, it is possible to realize outdoor lighting with a storage battery that is low in cost and strong against disasters.

It is a figure which shows the circuit structure of the power supply device for outdoor lighting which concerns on embodiment of this invention. It is a figure which shows the structural example of a switching circuit. It is a figure which shows the example of installation of the power supply device which concerns on embodiment of this invention. It is a figure for demonstrating the AC outlet of FIG. It is a figure which shows the circuit structure of the power supply device for outdoor lighting which concerns on a modification.

  FIG. 1 is a diagram showing a circuit configuration of a power supply device 1 for outdoor lighting according to an embodiment of the present invention. Hereinafter, in the present embodiment, street lights such as street lights and security lights are assumed as outdoor lighting. Further, an AC-driven LED lamp 3 is assumed as a light source. LED lighting has low power consumption and long life compared to fluorescent lamps and heat-generating bulbs, and is becoming the mainstream of lighting fixtures.

  The power supply device 1 includes an input terminal 11, a breaker 12, a surge protection device 13, an AC-DC converter 14, a storage battery 15, a DC-AC converter 16, a switching circuit 17, an AC outlet 18, and an output terminal 19.

  Input terminal 11 is connected to system power supply 2 and receives system voltage. The breaker 12 is inserted into a wiring connected to the input terminal 11, and interrupts the wiring when an abnormality such as an overcurrent occurs. The surge protection device 13 is connected to the subsequent wiring of the breaker 12 and releases the lightning surge applied to the input terminal 11 to the ground.

  The AC-DC converter 14 converts the AC system voltage input from the input terminal 11 into a DC voltage and outputs the DC voltage to the storage battery 15. In the present embodiment, it is assumed that a lithium ion battery is used as the storage battery 15. Lithium-ion batteries have high energy density and are environmentally friendly, unlike lead batteries, and have become popular as storage batteries.

  The DC-AC converter 16 converts the DC voltage output from the storage battery 15 into an AC voltage and outputs the AC voltage. The AC-DC converter 14 and the DC-AC converter 16 may be integrated to form a bidirectional AC-DC converter.

  The switching circuit 17 includes first terminals A1 and A2 that output a system voltage input from the input terminal 11, and second terminals B1 and B2 that output a voltage of the storage battery 15 converted into an AC voltage by the DC-AC converter 16. , And provided between the output terminal 19 of the power supply device 1. Hereinafter, terminals connected to the output terminal 19 by wires are referred to as third terminals C1 and C2.

  The switching circuit 17 switches whether the first terminals A1 and A2 are connected to the third terminals C1 and C2 or the second terminals B1 and B2 are connected according to the system voltage. That is, switching is made between supplying power from the power supply device 1 to the LED lamp 3 or supplying power stored in the storage battery 15. In the present embodiment, system power is supplied to the LED lamp 3 while the power supply device 1 can acquire the system voltage. When the system voltage cannot be acquired due to a power failure or disconnection of the system line, power is supplied from the storage battery 15.

  FIG. 2 is a diagram illustrating a configuration example of the switching circuit 17. FIG. 2 shows an example in which the switching circuit 17 is configured by a C contact relay. The C contact relay includes a coil 17a, a first contact 17b, a second contact 17c, a normally open terminal, a normally closed terminal, and a common terminal. The normally-on open terminal is connected to the first terminals A1 and A2, the normally closed terminal is connected to the second terminals B1 and B2, and the common terminal is connected to the third terminals C1 and C2.

  A system voltage input from the input terminal 11 is applied to both ends of the coil 17a. While the system voltage is input, a current flows through the coil 17a and the coil 17a is excited. When the coil 17a is excited, the first contact 17b and the second contact 17c fall to the normally open terminal side, the first terminals A1 and A2 for outputting the system voltage, and the third terminal C1 connected to the output terminal 19, C2 conducts. On the other hand, when the system voltage is interrupted due to a power failure or the like, no current flows through the coil 17a and the coil 17a is demagnetized. When the coil 17a is demagnetized, the first contact 17b and the second contact 17c fall to the normally closed terminal side, the second terminals B1 and B2 that output the battery voltage, and the third terminal C1 connected to the output terminal 19, C2 conducts.

  The configuration in FIG. 2 is an example, and a combination of a normally-off type semiconductor switch and a normally-on type semiconductor switch may be used instead of the relay. In this case, a normally-off type semiconductor switch is connected between the first terminals A1, A2 and the third terminals C1, C2, and a system voltage is applied to the gate terminal of the semiconductor switch. A normally-on type semiconductor switch is connected between the second terminals B1 and B2 and the third terminals C1 and C2, and a system voltage is applied to the gate terminal of the semiconductor switch.

  Returning to FIG. A switching element 42 is inserted into the wiring extending from the output terminal 19 of the power supply device 1. The switching element 42 may be a semiconductor switch or a relay. The optical sensor 41 detects the brightness and controls on / off of the switching element 42 according to the amount of light. As the optical sensor 41, for example, a CDS cell can be used.

  The optical sensor 41 controls the switching element 42 to be turned off when the detected light amount is greater than or equal to the set value, and controls the switching element 42 to be turned on when it is less than the set value. That is, in principle, the switching element 42 is turned off in the daytime to turn off the LED lamp 3, and the switching element 42 is turned on in the nighttime to turn on the LED lamp 3.

  A branch line LB having an AC outlet 18 connected to the tip is branched from the wiring between the switching circuit 17 and the output terminal 19. An AC plug of an electronic device can be inserted into the AC outlet 18, and the electronic device can receive power supply from the power supply device 1. The AC outlet 18 can be used, for example, as an emergency power source in the event of a disaster.

  FIG. 3 is a diagram showing an installation example of the power supply device 1 according to the embodiment of the present invention. The power supply device 1 is installed on the upper side of the column 5. The power supply device 1 is installed at a position higher than the ground on the support column 5 by a predetermined distance or more. The predetermined distance is, for example, a human average height + 50 cm. That is, it is the distance that human hands cannot reach.

  The power supply device 1 is housed in, for example, a U-shaped housing, and is installed so that the housing is fitted into the column 5. The reason why the power supply device 1 is installed on the upper side of the column 5 is to avoid inundation in the event of a flood. In addition, as the distance between the power supply device 1 and the LED lamp 3 is shorter, there is an effect that a wiring loss between them can be reduced and an effect of preventing mischief.

  The power supply device 1 according to the present embodiment is an add-on power supply device and can be installed on an existing streetlight later. In that case, what is necessary is just to cut | disconnect the wiring of the existing lighting fixture connected to the system | strain line, and to connect to the output terminal 19 of the power supply device 1. FIG. In addition, when the existing lighting fixture is a fluorescent lamp, you may perform replacement | exchange from a fluorescent lamp to an LED lamp simultaneously. When replacing with an AC drive LED lamp, the drive wiring of an existing lighting fixture can be diverted as it is. Moreover, when an optical sensor is attached to an existing lighting fixture, the optical sensor can also be diverted.

  FIG. 4 is a diagram for explaining the AC outlet 18 of FIG. The branch wiring BL has a length corresponding to the distance h from the installation position of the support column 5 to the ground. During normal times, the branch wiring BL is wound and stored in the housing. In the event of an emergency such as a disaster, the AC outlet 18 is removed from the housing. The AC outlet 18 can be used for charging an electronic device (for example, a mobile phone, a smartphone, a portable radio, etc.) held by the evacuees.

  The length of the branch wiring BL is required to allow a person on the ground to insert a plug of a device to be charged into the AC outlet 18. As long as this condition is satisfied, the length of the branch wiring BL may be shorter than the “distance from the installation position to the ground” h. For example, it may be about 1 m shorter than the distance h. When the design is such that the bottom of the housing opens and the AC outlet 18 falls in the event of an abnormality, it is better to be shorter than the “distance from the installation position to the ground” h so that the AC outlet 18 does not hit the ground.

  Further, the length of the branch wiring BL may be longer than the “distance from the installation position to the ground” h so that the AC outlet 18 can be used even at a place away from the support column 5. In this case, a part of the branch wiring BL may be fixed with a fastener so as to maintain the winding state even when dropped. The AC outlet 18 may be covered with a cover serving as a cushion. Further, a mechanism that slowly drops the AC outlet 18 from the housing may be used.

  In FIG. 1, the branch position of the branch line LB is provided in the subsequent stage of the switching circuit 17. Thereby, even if it is at the time of a power failure, the evacuee can charge the electric power stored in the storage battery 15. In this regard, if the branch position of the branch line LB is provided at a position preceding the storage battery 15, charging cannot be performed during a power failure. It is also conceivable to provide a branch position of the branch line LB between the DC-AC converter 16 and the switching circuit 17. However, in the present embodiment, a switch for stopping the charging of the storage battery 15 is not provided for cost reduction. Therefore, the amount of discharge from the AC outlet 18 to the electronic device cannot be limited to the amount of electricity stored in the storage battery 15 in terms of circuit configuration. When the storage amount of the storage battery 15 decreases, the storage battery 15 is charged from the system power supply 2, but when power loss in the AC-DC converter 14 and the DC-AC converter 16 is taken into account, the storage battery 15 directly does not pass through the storage battery 15. It is better to be able to charge the battery, and it is preferable to provide it after the switching circuit 17.

  FIG. 5 is a diagram illustrating a circuit configuration of a power supply device 1 for outdoor lighting according to a modification. Although FIG. 1 shows an example in which the optical sensor 41 and the switching element 42 are not mounted on the power supply device 1, FIG. 5 shows an example in which the optical sensor 41 and the switching element 42 are mounted on the power supply device 1. An external light take-in port is provided in the housing of the power supply device 1, and the taken-in light is guided to the optical sensor 41. Alternatively, the optical sensor 41 is exposed to the outside. When the existing optical sensor cannot be diverted, the power supply device 1 according to the modification may be used.

  As described above, according to this embodiment, since a microcomputer is not used, it is possible to construct a power supply device 1 that is low-cost and highly reliable. In addition, the number of switches is kept to a minimum, reducing costs. Moreover, since it is installed on the upper side of the column 5 and the AC outlet 18 can be taken out in an emergency, it is possible to construct a streetlight that is resistant to disaster.

  The present invention has been described based on the embodiments. These embodiments are exemplifications, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are within the scope of the present invention. is there.

  For example, a solar panel may be installed on the support column 5 and the electric power generated by the solar panel may be stored in the storage battery 15.

  The power supply device 1 according to the present embodiment can be used not only for street lamps but also for other outdoor lighting such as tunnel lights. In the case of outdoor lighting that is always on, such as a tunnel light, the optical sensor 41 and the switching element 42 can be omitted.

  The embodiment may be specified by the following items.

[Item 1]
A storage battery 15;
An input terminal 11 for receiving the system voltage;
An output terminal 19 for connection to wiring for supplying current to AC-driven outdoor lighting;
An AC-DC converter 14 that converts a system voltage input from the input terminal 11 into a DC voltage and outputs the DC voltage to the storage battery 15;
A DC-AC converter 16 that converts a DC voltage output from the storage battery 15 into an AC voltage and outputs the AC voltage;
First terminals A1 and A2 for outputting a system voltage inputted from the input terminal 11, and second terminals B1 and B2 for outputting a voltage of the storage battery 15 converted into an AC voltage by the DC-AC converter 16. A switching circuit 17 provided between the output terminal 19 and for switching between connecting the first terminals A1 and A2 or connecting the second terminals B1 and B2 to the output terminal 19 according to the system voltage; ,
A power supply device 1 for outdoor lighting, comprising:
As a result, it is possible to realize a low-cost outdoor lighting power supply device that is resistant to disasters.
[Item 2]
The switching circuit 17 includes a normally open terminal connected to the first terminals A1 and A2, a normally closed terminal connected to the second terminals B1 and B2, and a wiring connected to the output terminal 19. 2. The outdoor lighting power supply device 1 according to item 1, which is a relay having a common terminal connected to terminals C1 and C2.
Thereby, a system power supply and a battery power supply can be switched by hardware control, and a low-cost and highly reliable outdoor lighting power supply apparatus can be realized.
[Item 3]
The power supply device for outdoor lighting 1 according to item 1, further comprising an AC outlet 18 connected to a branch line LB branched from a wiring between the switching circuit 17 and the output terminal 19.
As a result, an emergency power supply can be secured.
[Item 4]
The outdoor lighting power supply device 1 is installed at a position higher than a predetermined distance of the support column 5 from the ground.
Item 4. The outdoor illumination power supply device 1 according to item 3, wherein the branch line LB has a length corresponding to the distance from the installation position of the outdoor illumination power supply device 1 in the support column 5 to the ground.
As a result, it is possible to realize outdoor lighting that is resistant to flooding while securing a power supply in an emergency.
[Item 5]
An optical sensor 41;
Any one of items 1 to 4, further comprising: a switching element 42 provided between the switching circuit 17 and the outdoor illumination and controlled in accordance with a detection value of the optical sensor 41. The power supply device 1 for outdoor lighting described in 1.
As a result, when it is bright, it can be turned off and the electricity bill can be saved.

  DESCRIPTION OF SYMBOLS 1 Power supply device, 2 system | strain power supply, 3 LED lamp (outdoor lighting), 4 48V system load, 5 support | pillar, 11 input terminal, 12 breaker, 13 surge protection device, 14 AC-DC converter (AC-DC conversion part), 15 Storage battery, 16 DC-AC converter (DC-AC converter), 17 switching circuit, 17a coil, 17b first contact, 17c second contact, 18 AC outlet, 19 output terminal, 41 optical sensor, 42 switching element, LB branch line.

Claims (5)

A storage battery,
An input terminal for receiving the system voltage;
An output terminal for connection to a wiring for supplying current to AC-driven outdoor lighting;
An AC-DC converter that converts a system voltage input from the input terminal into a DC voltage and outputs the DC voltage to the storage battery;
A DC-AC converter that converts a DC voltage output from the storage battery into an AC voltage and outputs the AC voltage;
Provided between the output terminal and a first terminal that outputs a system voltage input from the input terminal, a second terminal that outputs the voltage of the storage battery converted into an AC voltage by the DC-AC converter, and the output terminal. A switching circuit for switching whether to connect the first terminal or the second terminal to the output terminal according to the system voltage;
A power supply device for outdoor illumination, comprising:   The switching circuit includes a normally open terminal connected to the first terminal, a normally closed terminal connected to the second terminal, and a common terminal connected to a terminal of a wiring connected to the output terminal. The power supply apparatus for outdoor lighting according to claim 1, wherein the power supply apparatus is an outdoor relay.   The outdoor lighting power supply device according to claim 1, further comprising an AC outlet connected to a branch line branched from a wiring between the switching circuit and the output terminal. The outdoor lighting power supply device is installed at a position higher than a predetermined distance from the ground of the support column,
4. The outdoor lighting power supply device according to claim 3, wherein the branch line has a length corresponding to a distance from an installation position of the outdoor lighting power supply device to the ground. An optical sensor;
The switching element which is provided between the said switching circuit and the said outdoor illumination, and is controlled according to the detected value of the said optical sensor is further provided, The any one of Claim 1 to 4 characterized by the above-mentioned. Power supply for outdoor lighting.