KR102005509B1 - lighting apparatus having junction unit between LED and SMPS - Google Patents

Abstract

According to various embodiments, an LED lighting apparatus is provided. The LED lighting apparatus includes a plurality of LED lights connected in parallel with first and second common lines, a plurality of power conversion modules for generating direct current power from a commercial AC power source, first and second output terminals to which the plurality of power conversion modules are connected in parallel, a junction box which includes a plurality of diodes connected between each of the plurality of power conversion modules and the first output terminal, and a line part which includes first and second connection lines connecting the first and second output terminals to the first and second common wires, respectively. All the LED lights can emit light even if some of power supply modules fail.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting apparatus having an LED SMPS junction unit,

The present invention relates to an LED lighting apparatus for illuminating an installation space, and more particularly to an LED lighting apparatus including a junction unit connected between an LED lighting and a power conversion apparatus.

Various types of illumination devices exist depending on the type of light source. For example, there is a lighting apparatus using a light emitting diode (LED) as a light source, such as a halogen lamp, a fluorescent lamp, a mercury lamp, a high-pressure sodium lamp or the like. Among them, an LED lighting device using a light emitting diode as a light source is used together with a power conversion device that converts commercial AC power to generate DC power.

On the other hand, LED lighting devices are used in factories for industrial use or as street lights due to their high energy efficiency and long life. It is also widely used as outdoor lighting in places such as parks, golf courses, ski resorts, or other sports facilities.

Fig. 1 exemplarily shows an LED lighting device used for outdoor lighting.

The LED lighting apparatus 10 includes an LED lighting unit 1, a support 2, and a distribution board 3. The LED lighting unit 1 is fixed to the upper end of the column 2 and may include a plurality of LED lights 11 as shown in Fig. The LED lights 11 can be supported by frames provided at the upper end of the column 2. [ The column 2 is fixed on the ground and can support the LED lighting unit 1. [

The power distribution board 3 may be installed at the lower end of the column 2 and may be provided with a power conversion device for generating direct current power from commercial AC power and supplying it to the LED lighting unit 1. [

2 schematically shows a circuit diagram of an LED illumination device.

2, the LED lighting unit 1 includes four LED lights 11, 12, 13, and 14 for ease of understanding. The LED lighting unit 1 includes four LED lights 11, 12, 13, And the distribution board 3 is shown briefly as including four power supply modules 31, 32, 33,

As shown in FIG. 2, the LED lights 11, 12, 13, and 14 may each include a plurality of LEDs. The number of LEDs may vary depending on the electrical characteristics of the power supply modules 31, 32, 33, and 34 and the LEDs. Although the six LEDs are shown as being connected in series in FIG. 2, this is exemplary and a greater number of LEDs may be connected in series and in parallel.

The first to fourth power supply modules 31, 32, 33, and 34 may receive the commercial AC power from the commercial power source 4 to generate the DC power. The first to fourth power supply modules 31, 32, 33 and 34 are connected to the first to fourth LED lights 11, 12, 13 and 14, respectively, , 12, 13, and 14, respectively.

Wires for connecting the first to fourth power supply modules 31, 32, 33 and 34 and the first to fourth LED lights 11, 12, 13 and 14 may be installed in the column 2, respectively.

The power supply modules 31, 32, 33 and 34 have a relatively high possibility of failure and relatively short life span as compared with the LED lights 11, 12, 13 and 14. When any one of the power supply modules 31, 32, 33, and 34 fails, the LED lighting that is supplied with DC power from the power supply modules is turned off. In the case of such a defect, the three LED lights are illuminated, but the remaining one LED illumination is not illuminated. Therefore, such defects can be easily found in the place where the LED illumination device 10 is delivered, The manufacturer who made the battery 10 is requested to repair it. However, the manufacturer has to visit the place where the LED lighting device 10 is installed in order to replace the faulty power supply module, so that time and cost are greatly increased.

An object of the present invention is to provide an LED lighting device in which all the LED lights emit light even if some of the power supply modules fail.

An LED lighting device according to an aspect of the present invention includes a plurality of LED lights connected in parallel to first and second common wirings, a plurality of power conversion modules for generating direct current power from a commercial AC power supply, A junction box including first and second output terminals connected in parallel and a plurality of diodes connected between each of the plurality of power conversion modules and the first output terminal; And a wiring portion including first and second connection wirings connected to the first and second common wirings.

According to one example, the junction box includes a plurality of input connectors for connecting to each of the plurality of power conversion modules, and an output connector for connecting to the first and second connection wirings with the first and second output terminals, . ≪ / RTI >

According to another example, the LED illumination device may further include a plurality of primary junction boxes having the same configuration as the junction box. The output connectors of each of the plurality of primary junction boxes may be connected directly to each of the plurality of input connectors of the junction box.

According to another example, the LED lighting apparatus may include a plurality of power conversion modules and a plurality of main power conversion modules and at least one spare power conversion module. The number of the plurality of main power conversion modules may be the same as the number of the plurality of LED lights.

According to another example, the LED lighting device may include at least one switch connected between the at least one standby power conversion module and the commercial AC power supply, respectively, and at least one switch, depending on the status of the plurality of main power conversion modules, And a control unit for controlling the switch.

According to another example, the control unit may sense an output voltage of each of the plurality of power conversion modules and an output current output through the first output terminal.

According to another example, if the output voltage of at least one of the main power conversion modules is lower than a predetermined voltage reference value and the output current is smaller than a predetermined current reference value, the preliminary power conversion module converts the direct current power The switch can be turned on so that the switch can be turned on.

According to another example, the LED illumination device may include a plurality of switches connected between each of the plurality of power conversion modules and the commercial AC power source, and a plurality of switches, each of which controls the plurality of switches in accordance with the state of the plurality of power conversion modules And may further include a control unit. The number of the plurality of power conversion modules may be greater than the number of the plurality of LED lights.

According to another example, the control unit may sense an output voltage of each of the plurality of power conversion modules and an output current output through the first output terminal.

According to another example, the controller may sequentially turn on the plurality of switches until the output current becomes larger than a predetermined current reference value.

According to another example, the control unit may change a switch that is turned off among the plurality of switches so that the plurality of power conversion modules operate equally to each other.

According to another example, when the defective power conversion module having an output voltage lower than a predetermined voltage reference value among the power conversion modules is detected, the control unit turns off the switch connected to the defective power conversion module, And output information for identifying the power conversion module.

A junction box for an LED lighting device according to an aspect of the present invention includes a plurality of input connectors for respectively connecting to a plurality of power conversion modules for generating direct current power from a commercial AC power source, 1 and second output terminals, an output connector for being connected to first and second connection wiring, to which a plurality of LED lights are connected in parallel, and an output connector connected between each of the plurality of power conversion modules and the first output terminal And includes a plurality of Schottky diodes.

The illumination device according to various embodiments of the present invention can emit all of the lights even if some of the power supply modules fail. Therefore, since it is possible to have a margin for repairing replacement of the power supply module in which the failure occurs, the maintenance cost can be reduced, and the satisfaction of the customer who has supplied the lighting apparatus can be maintained.

In addition, if a failure occurs in some of the power supply modules, the brightness of the lights can be maintained by employing a structure in which the redundant power supply module can supply power. In addition, the standby power supply module operates in the same sequence as the basic power supply module, thereby further increasing the expected lifetime of the power supply modules and lowering the failure occurrence rate.

On the other hand, since it is possible to reduce the number of wirings installed on the support, the installation work of the lighting device becomes easier and the installation cost can be reduced and the possibility of failure in the wiring provided in the support is also reduced.

Fig. 1 exemplarily shows an LED lighting device used for outdoor lighting.
2 schematically shows a circuit diagram of an LED illumination device.
3 shows a block diagram of an LED illumination device according to an embodiment.
4 schematically shows a circuit diagram of an LED illumination device according to an embodiment.
Figure 5 schematically illustrates a junction box according to one embodiment.
Figure 6 schematically illustrates the connection configuration of junction boxes according to one embodiment.
Fig. 7 schematically shows a circuit diagram of an LED illumination device according to another embodiment.
Figure 8 schematically illustrates a junction box according to another embodiment.
Fig. 9 schematically shows a part of a circuit diagram of an LED lighting apparatus according to a modified embodiment.
10 shows a block diagram of an LED illumination device according to another embodiment.
Fig. 11 schematically shows a part of a circuit diagram of an LED illumination device according to another embodiment.

Brief Description of the Drawings The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described in conjunction with the accompanying drawings. It is to be understood, however, that the invention is not limited to the embodiments shown herein but may be embodied in many different forms and should not be construed as being limited to the preferred embodiments of the present invention. do. BRIEF DESCRIPTION OF THE DRAWINGS The above and other aspects of the present invention will become more apparent by describing in detail preferred embodiments thereof with reference to the attached drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. .

3 shows a block diagram of an LED illumination device according to an embodiment.

Referring to FIG. 3, the LED lighting apparatus 100 includes a power supply unit 110, a junction box 120, a wiring unit 130, and an LED lighting unit 140.

The power supply unit 110 may include a plurality of power conversion modules that generate DC power from a commercial AC power source. The junction box 120 is connected to the power conversion modules of the power supply unit 110, and can output the DC power generated from the power conversion modules through the common terminal. The power supply unit 110 and the junction box 120 may be installed in the distribution board 3 of FIG. The junction box 120 is connected between the power supply unit 110 and the LED illumination unit 140, and may be referred to as a junction unit or an LED SMPS junction unit.

The LED lighting unit 140 may include a plurality of LED lights connected in parallel. The LED illumination unit 140 may be installed on the upper part of the column 2 of FIG. 1 like the LED illumination 1 of FIG.

The wiring part 130 may connect the output terminal of the junction box 120 to the LED lighting part 140. The wiring part 130 may include a first connection wiring to which a positive DC voltage is applied and a second connection wiring to which a negative DC voltage or a ground voltage is applied. The wiring part 130 may be provided in the support 2.

The LED lighting apparatus shown in Fig. 2 requires eight wiring lines since the power supply modules 31, 32, 33 and 34 are connected to the LED lights 11, 12, 13 and 14, respectively, In the LED lighting apparatus 100 of the first embodiment, the power supply modules 31, 32, 33 and 34 are connected to the LED lights 11, 12, 13 and 14 through only two wires, Installation work can be facilitated.

4 schematically shows a circuit diagram of an LED illumination device according to an embodiment.

Referring to FIG. 4, the LED lighting apparatus 100 may include a plurality of LED lights 145, a plurality of power conversion modules 115, a junction box 120, and a wiring unit 130. Each of the plurality of LED lights 145 is connected to the first and second common wirings 141 and 142 in parallel. Each of the plurality of power conversion modules 115 generates DC power from a commercial AC power source VS. The junction box 120 includes first and second output terminals 121 and 122 and a plurality of power conversion modules 115 connected in parallel to each other and a plurality of power conversion modules 115 and a first output terminal 121 And a plurality of diodes (123) connected to the diode. The wiring portion 130 includes first and second connection wirings 131 and 132 connecting the first and second output terminals 121 and 122 to the first and second common wirings 141 and 142, .

Although the number of power conversion modules 115, the number of diodes 123, and the number of LED lights 145 are shown in Fig. 4 as being all four, this is only exemplary and may be fewer or greater .

The power conversion module 115 can convert the AC power received from the commercial AC power supply VS into DC power. The power conversion module 115 may include a rectifying circuit. The power conversion module 115 may be an SMPS (switch mode power supply). One power conversion module 115 can supply the power required for one LED illumination 145 to emit light at the target brightness.

The DC powers generated by the power conversion modules 115 may be transmitted to the first and second output terminals 121 and 122 of the junction box 120. [ A diode 123 may be disposed between each of the power conversion modules 115 and the first output terminal 121. Diode 123 may be a Schottky diode that has a low threshold voltage and can switch at high speed during forward current. The diode 123 can prevent a current from flowing from the normal power conversion modules 115 to the defective power conversion modules 115 when a fault occurs in some of the power conversion modules 115. [

The first connection wiring 131 electrically connects the first output terminal 121 to the first common wiring 141 and the second connection wiring 132 connects the second output terminal 122 to the second common wiring 141 142, respectively.

The LED illumination 145 may include a plurality of light emitting diodes (LEDs). The light emitting diodes (LEDs) may be connected in series as shown in FIG. 4, but they may be connected in series or in parallel. The power required for the LED lights 145 to emit light at the target brightness can be supplied from the power conversion modules 115. [

For example, it is assumed that each of the power conversion modules 115 can supply 100W, and that each of the LED lights 145 can emit at a target brightness when supplied with 100W. According to the present invention, 400 W generated in the four power conversion modules 115 is supplied to the four LED lights 145 in common through the wiring part 130. 100 W is supplied to each of the LED lights 145, so that the LED lights 145 can emit light with a desired brightness.

When a failure occurs in one of the power conversion modules 115 of the four power conversion modules 115 and the normal DC voltage can not be output, 300 W of power flows through the wiring 130, and LED lights 145 ), The LED lights 145 can emit light with brightness lower than the target brightness, for example, 75% of the normal brightness.

On the other hand, in the LED lighting device of FIG. 2, the LED lighting 12 connected to the power conversion module (for example, 32) in which a failure occurs is turned off. If only one of the four LED lights 11, 12, 13, and 14 is turned off, the customer can easily find that a fault has occurred and can prompt the manufacturer to repair it immediately. However, it is natural that the power conversion modules 31, 32, 33, and 34 should be replaced when defects occur due to a predetermined life span. Therefore, it is difficult for a manufacturer to obtain product reliability from a manufacturer's point of view. This can be a factor.

According to the present invention, even if a failure occurs in a part of the power conversion modules 115, the LED lights 145 emit light at lower brightness than the target brightness, so that the customer may not easily find that a failure has occurred . In addition, as shown in FIG. 1, if the LED lighting unit 1 includes 16 LED lights 11, the brightness of each LED lighting is reduced by only 1/16, so that the customer can not easily notice it do. As a result, manufacturers can maintain product reliability at high levels, and can make more effective after-sales service strategies because they can spend time repairing defects.

In addition, when two power conversion modules 115 of the four power conversion modules 115 fail to produce a normal DC voltage, 200 W of power flows through the wiring part 130, The LED lights 145 can emit light at a brightness lower than the target brightness, for example, 50% of normal brightness.

In addition, when three power conversion modules 115 of the four power conversion modules 115 fail to output a normal DC voltage, 100 W of power flows through the wiring part 130, The LED lights 145 can emit light at a brightness lower than the target brightness, for example, 25% of normal brightness. As described above, the LED lights 145 can emit light even at low brightness, unless all the power conversion modules 115 fail.

Figure 5 schematically illustrates a junction box according to one embodiment.

5, the junction box 120 includes a plurality of input connectors 124 and first and second connection wires (131 and 132 in FIG. 4) for connection to power conversion modules (115 in FIG. 4) (Not shown). The output connector 125 may include first and second output terminals 121 and 122.

As shown in FIG. 5, the input connectors 124 and the output connector 125 may have different male and female types so that they can be coupled to each other. For example, the input connector 124 may be a male type connector and the output connector 125 may be a female type connector. The opposite is possible, of course.

Figure 6 schematically illustrates the connection configuration of junction boxes according to one embodiment.

Referring to FIG. 6, the junction boxes (120 in FIG. 5) may include primary junction boxes 120_1 and secondary junction boxes 120_2. As shown in FIG. 6, the output connectors 125_1 of the primary junction boxes 120_1 may be coupled to the input connectors 124_2 of the secondary junction box 120_2, respectively.

Although not shown in FIG. 6, the input connectors 124_1 of the primary junction boxes 120_1 may be connected to the power conversion modules 115 (FIG. 4), respectively, The second connection wiring 125_2 may be connected to the first and second connection wirings 131 and 132 of the wiring portion 130 (FIG. 4). In this case, the DC power output from the 16 power conversion modules 115 is supplied to 16 LED lights (145 in FIG. 4) through the primary junction boxes 120_1 and the secondary junction box 120_2 in FIG. 6 Can be supplied.

In addition, since only two wirings (i.e., the first and second connection wirings 131 and 132) are provided in the support (2 in Fig. 1), the installation cost can be reduced and the installation and maintenance can be facilitated. For reference, in the example of Fig. 2, 32 wirings must be provided in the support 2.

When any one of the sixteen power conversion modules 115 fails, the sixteen LED lights 145 can emit light with a brightness of 15/16 of the target brightness. Since the second-order junction box 120_2 flows a larger-sized current than the first-order junction boxes 120_1, a larger-capacity diode 123 and thick wiring can be used.

Fig. 7 schematically shows a circuit diagram of an LED illumination device according to another embodiment.

7, the LED lighting apparatus 100a includes a plurality of LED lights 145, a power supply unit 110a including a plurality of power conversion modules 115 and 117, a junction box 120a, ), A control unit 150, and a switch 160.

Each of the plurality of LED lights 145 is connected to the first and second common wirings 141 and 142 in parallel. Each of the power conversion modules 115 and 117 generates DC power from a commercial AC power source VS. The junction box 120a includes first and second output terminals 121 and 122 and power change modules 115 and 117 to which the power conversion modules 115 and 117 are connected in parallel and a first output terminal 121 And a plurality of diodes 123 connected between the plurality of diodes 123. The wiring portion 130 includes first and second connection wirings 131 and 132 connecting the first and second output terminals 121 and 122 to the first and second common wirings 141 and 142, .

7, the number of the power conversion modules 115 and 117 is 5, the number of the diodes 123 is equal to the number of the power conversion modules 115 and 117 and the number of the LED lights 145 is 4 Although this is illustrative only and may be fewer or greater. According to the embodiment of FIG. 7, the number of power conversion modules 115, 117 may be greater than the number of LED lights 145.

The power conversion modules 115 and 117 include a plurality of main power conversion modules 115 and at least one spare power conversion module 117. Each of the power conversion modules 115 and 117 can supply the power required for one LED illumination 145 to emit at the target brightness. The number of the main power conversion modules 115 may be the same as the number of the LED lights 145. The number of standby power conversion modules 117 is shown as one, but may be more.

The power conversion modules 115 and 117 can convert the AC power received from the commercial AC power source VS into DC power. The switch 160 may be connected between the commercial AC power source VS and the standby power conversion module 117. The switch 160 may be controlled by the control unit 150. [

The controller 150 may control the switch 160 according to the state of the main power conversion modules 115. [ The control unit 150 may be installed in the junction box 120a. However, this is exemplary, and the control unit 150 may exist in a separate configuration besides the junction box 120a.

When a failure occurs in one of the main power conversion modules 115, the controller 150 detects that a failure has occurred and turns on the switch 160 to supply the backup AC power (VS ) Of AC power. The standby power conversion module 117 converts the AC power to generate DC power and the generated DC power can be supplied to the LED lighting unit 140 through the junction box 120a and the wiring unit 130. [

The LED lighting units 145 of the LED lighting unit 140 all emit light with the target brightness because the standby power conversion module 117 supplies DC power instead of the power conversion module in which the failure occurs in the main power conversion modules 115. [ can do.

The diode 123 connected to the power conversion module 115 in which the failure occurs in the main power conversion modules 115 is connected to the main power conversion module 115 and the standby power conversion module 117, It is possible to prevent the failure from being supplied to the power conversion module 115 in which the failure occurs.

In the embodiment of FIG. 7, when two or more of the main power conversion modules 115 fail, the LED lights 145 may emit light at a brightness lower than the target brightness .

Figure 8 schematically illustrates a junction box according to another embodiment.

8, the junction box 120a includes a plurality of input connectors 124 for connecting to each of the main power conversion modules (115 in FIG. 4) and a spare power conversion module (117 in FIG. 4) And an output connector 125 to be connected to the second connection wiring (131, 132 in Fig. 4). The output connector 125 may include first and second output terminals 121 and 122.

The control unit 150 can sense the output voltage of each of the power conversion modules 115 and 117 and the output current output through the first output terminal 121. [ The control unit 150 may be connected to the second output terminal 122 and grounded.

Although not shown in FIG. 8, a resistor divider may be connected between the output terminal of each of the power conversion modules 115 and 117 and the control unit 150. FIG. The controller 150 can sense a voltage directly proportional to the output voltage of each of the power conversion modules 115 and 117 through the resistor divider.

A current sensor for sensing an output current, for example, a shunt, may be installed at the first output terminal 121. [ The controller 150 may sense an output current output through the first output terminal 121 using a current sensor.

The controller 150 may compare the output voltage of each of the main power conversion modules 115 with a preset voltage reference value. The controller 150 may compare an output current output through the first output terminal 121 with a predetermined current reference value. The control unit 150 may include a comparison circuit for such comparison. According to another example, the control unit 150 may include an analog digital circuit for comparison through operation. The voltage reference value may be preset to 90% of the rated voltage of the main power conversion modules 115, for example. The current reference value can be set in advance to, for example, 90% of the current required when the LED illumination unit (140 in FIG. 7) emits light at the target brightness.

If the output voltage of at least one of the main power conversion modules 115 is lower than a preset voltage reference value and the sensed output current is smaller than a preset current reference value, The switch 160 can be turned on so that the module 117 can generate DC power. Therefore, even if a failure occurs in any one of the main power conversion modules 115 of the main power conversion modules 115, the spare power conversion module 117 is started instead of the defective power conversion module 115, All of the LED lights 145 of the light source 140 may emit light with a target brightness.

Fig. 9 schematically shows a part of a circuit diagram of an LED lighting apparatus according to a modified embodiment.

9, the LED lighting apparatus 100b includes a power supply unit 110b including a plurality of power conversion modules 115, 117a, and 117b, a junction box 120b, a controller 150, 2 switches 160a and 160b. Although not shown in FIG. 9, the LED lighting apparatus 100b further includes a wiring portion 130, and a plurality of LED lights 145. FIG.

Each of the plurality of LED lights 145 is connected to the first and second common wirings 141 and 142 in parallel. Each of the power conversion modules 115, 117a, and 117b generates DC power from a commercial AC power source VS. The junction box 120b includes first and second output terminals 121 and 122 and power change modules 115 and 117a and 117b to which the power conversion modules 115 and 117a and 117b are connected in parallel, And a plurality of diodes 123 connected between the output terminals 121. The wiring portion 130 includes first and second connection wirings 131 and 132 connecting the first and second output terminals 121 and 122 to the first and second common wirings 141 and 142, .

7, the number of the power conversion modules 115, 117a and 117b is 6, the number of the diodes 123 is equal to the number of the power conversion modules 115 and 117, and the number of the LED lights 145 is Although shown as four individuals, this is exemplary only and may be fewer or greater. According to the embodiment of FIG. 7, the number of power conversion modules 115, 117a, 117b is greater than the number of LED lights 145.

According to the embodiment of FIG. 7, the power conversion modules 115, 117a and 117b include a plurality of main power conversion modules 115 and first and second spare power conversion modules 117a and 117b. Each of the power conversion modules 115, 117a, and 117b can supply the power required for one LED light 145 to emit light at the target brightness. The number of the main power conversion modules 115 may be the same as the number of the LED lights 145.

The power conversion modules 115, 117a, and 117b may convert the AC power received from the commercial AC power source VS into DC power. The first switch 160a is connected between the commercial AC power source VS and the first preliminary power conversion module 117a and the second switch 160b is connected between the commercial AC power source VS and the second preliminary power conversion module 117b . The first and second switches 160a and 160b may be controlled by the controller 150. [

The controller 150 may control the first and second switches 160a and 160b according to the state of the main power conversion modules 115. [ The control unit 150 may be installed in the junction box 120b.

When a failure occurs in one of the main power conversion modules 115, the controller 150 detects that a failure has occurred, turns on the first switch 160a, and turns on the first preliminary power conversion module 117a And supplies AC power of the AC power source (VS). The first preliminary power conversion module 117a converts the AC power to generate DC power and the generated DC power can be supplied to the LED lighting unit 140 through the junction box 120b and the wiring unit 130. [ The first preliminary power conversion module 117a supplies the direct current power instead of the power conversion module in which the failure occurs in the main power conversion modules 115 so that the LED lights 145 of the LED lighting part 140 all have the target brightness .

If another failure occurs in one of the main power conversion modules 115, the controller 150 detects that a second failure has occurred and turns on the second switch 160b to turn on the second spare power conversion module 117b of the commercial AC power source (VS). The second preliminary power conversion module 117b converts the AC power to generate DC power and the generated DC power can be supplied to the LED lighting unit 140 through the junction box 120b and the wiring unit 130. [ The first and second preliminary power conversion modules 117a and 117b supply DC power instead of the two power conversion modules in which the failure occurs in the main power conversion modules 115, The light emitting diodes 145 can emit light with the target brightness.

In the embodiment of FIG. 9, when a failure occurs in three or more main power conversion modules 115 among the main power conversion modules 115, the LED lights 145 may emit all at a brightness lower than the target brightness .

10 shows a block diagram of an LED illumination device according to another embodiment.

Referring to FIG. 10, the LED lighting apparatus 100c includes a power supply unit 110, a junction box 120c, a wiring unit 130, an LED lighting unit 140, and a control board 170. FIG.

The power supply unit 110 may include a plurality of power conversion modules that generate DC power from a commercial AC power source. The junction box 120c may be connected to the power conversion modules of the power supply unit 110 to output the DC power generated from the power conversion modules through the common terminal. The LED lighting unit 140 may include a plurality of LED lights connected in parallel. The wiring part 130 may connect the output terminal of the junction box 120c to the LED lighting part 140. [ The control board 170 may control the power conversion modules according to the states of the power conversion modules of the power supply unit 110 sensed by the junction box 120c.

Fig. 11 schematically shows a part of a circuit diagram of an LED illumination device according to another embodiment.

11, the LED lighting apparatus 100c includes a power supply unit 110 including a plurality of power conversion modules 115, a junction box 120c, a control unit 150c, and a plurality of switches 160 do. 11, the LED illumination apparatus 100c further includes a wiring section 130, and a plurality of LED lights 145. [ The control unit 150c and the plurality of switches 160 may be installed on the control board 170 (Fig. 10).

Although the number of the power conversion modules 115 and the number of the diodes 123 are shown to be equal to each other and the number of the LED lights 145 is four in FIG. 11, this is only exemplary, Lt; / RTI > According to the embodiment of FIG. 11, the number of power conversion modules 115 is greater than the number of LED lights 145. Each of the power conversion modules 115 can supply the power required for one LED light 145 to emit at the target brightness.

The power conversion modules 115 can convert the AC power received from the commercial AC power supply VS into DC power. The switches 160 are connected between the respective power conversion modules 115 and the commercial AC power supply VS, respectively. The switches 160 may be controlled by the control unit 150. [ The controller 150 may control the switches 160 according to the state of the power conversion modules 115. [

The controller 150 may sense an output voltage of each of the power conversion modules 115 and an output current output through the first output terminal 121. [ The control unit 150 may be connected to the second output terminal 122 and grounded.

The controller 150 may compare an output current output through the first output terminal 121 with a predetermined current reference value. The control unit 150 may include a comparison circuit for the comparison or may include an analog digital circuit to perform a comparison function through calculation. The current reference value can be preset to, for example, 90% of the current required when the LED illumination unit 140 emits light at the target brightness.

The controller 150 may compare the output voltage of each of the power conversion modules 115 with a predetermined voltage reference value. The voltage reference value may be preset to, for example, 90% of the rated voltage of the power conversion modules 115.

The control unit 150 may turn on the switches 160 sequentially until the output current becomes larger than the predetermined current reference value. For example, when it is assumed that each of the power conversion modules 115 outputs a DC power of 100 W and consumes 100 W of DC power when each of the LED lights 145 emits a target brightness, For example, 360W.

When the controller 150 turns on the switches 160 in turn and the four power conversion modules 115 output 400 W, the controller 150 may no longer turn on the switch 160 . If any one of the four power conversion modules 115 fails, the output current will be 300W and the controller 150 turns on the switch 160 that has been turned off, And control the switches 160 to output this power. Accordingly, if any one of the power conversion modules 115 fails, the controller 150 turns on the switches 160 connected to the normal power conversion modules 115 to turn on the LED lights 145, All of which can emit light at the target brightness.

The order in which the control unit 150 turns on the switches 160 may be set in advance. The controller 150 may control the switches 160 so that the switch 160 to be turned off is changed so that the power conversion modules 115 operate normally. For example, the controller 160 may change the switch 160 that the control unit 150 first turns on. For example, if the controller 150 turns on the first switch 160 to the fourth switch 160, the controller 150 turns on the fifth switch 160 to the third switch 160 next time . To this end, the controller 150 may include a memory for storing the identification number of the switch 160 that was turned off last.

The controller 150 may store the cumulative operation time of each of the power conversion modules 115 in the memory. The controller 150 may turn on the switch 160 connected to the power conversion module 115 having the smallest cumulative operation time so that the power conversion modules 115 can operate equally with each other. When all of the power conversion modules 115 are normal, the power conversion module 115 having the longest cumulative operation time is rested, so that the power conversion modules 115 can operate equally with each other. This makes it possible for both the power conversion modules 115 to have a long life and lower the failure occurrence ratio.

The control unit 150 may detect the defective power conversion module 115 having an output voltage lower than a predetermined voltage reference value among the power conversion modules 115. [ The control unit 150 turns off the switch 160 connected to the defective power conversion module 115 and outputs information for identifying the defective power conversion module 115 to the memory 160. [ Lt; / RTI > The controller 150 excludes the switch 160 connected to the defective power conversion module 115 from turning on so that the power conversion module 115 identified as defective is controlled so as not to apply the commercial AC power VS can do.

The control unit 150 may output information for identifying the defective power conversion module 115 to the outside. To this end, the same number of display elements (for example, LEDs) as the power conversion module 115 may be installed in the control board 170 (FIG. 10). For example, when the power conversion module 115 operates normally, the controller 150 may control the display device so that the corresponding display device emits green light. When the power conversion module 115 is identified as bad, the controller 150 may control the display element so that the corresponding display element emits red light. When the switch 160 connected to the power conversion module 115 is turned off, the controller 150 can control the display element so that the corresponding display element emits yellow light.

According to another example, the control board 170 may be provided with a communication device. The control unit 150 may transmit information for identifying the defective power conversion module 115 to a predetermined address by using the communication device. The preset address may be a server of a vendor responsible for the maintenance of the LED lighting device. In the case of the embodiment of FIG. 11, the company can visit the LED lighting device to repair it, when receiving information that the two power conversion modules 115 are defective. Therefore, the maintenance can be performed more efficiently. In addition, even if two power conversion modules 115 fail, the LED lighting 145 emits light, so that the reliability of the customer will not be lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (13)

A post that is fixed vertically on the ground;
First and second connection wirings installed in the strut and extending along the strut;
An LED lighting unit installed at an upper end of the strut;
First and second common wirings constituting the LED illumination unit and connected to the first and second connection wirings, respectively;
A plurality of LED lights constituting the LED illumination unit and connected in parallel to the first and second common wirings;
A distribution board installed at a lower end of the strut;
A plurality of power conversion modules installed in the distribution board for generating direct current power from a commercial AC power source;
A plurality of primary junction boxes installed in the distribution board and configured to receive the direct current power from the plurality of power conversion modules; And
And a secondary junction box provided in the distribution board and configured to output the DC power received from the plurality of primary junction boxes to the first and second connection wirings and having the same configuration as each of the plurality of primary boxes Including,
Wherein each of the plurality of primary junction boxes comprises:
A plurality of first and second input terminals configured to respectively receive the direct current power from a corresponding one of the plurality of power conversion modules;
A plurality of input connectors each comprising the plurality of first and second input terminals, each of the plurality of input connectors configured to be connected to each of the corresponding power conversion modules;
A first output terminal;
A second output terminal commonly connected to the plurality of second input terminals;
An output connector including the first and second output terminals; And
And a plurality of Schottky diodes connected between the plurality of first input terminals and the first output terminal, respectively,
The secondary junction box includes:
A plurality of first and second input terminals respectively connected to the first and second output terminals of the plurality of first junction boxes and configured to respectively receive the direct current power from the plurality of first junction boxes;
A plurality of input connectors each including the plurality of first and second input terminals, and configured to be connected directly to the output connector of each of the plurality of first junction boxes;
A first output terminal configured to be connected to the first connection wiring;
A second output terminal commonly connected to the plurality of second input terminals and configured to be connected to the second connection wiring;
An output connector including the first and second output terminals, the output connector being configured to be connected to the first and second connection wirings; And
And a plurality of Schottky diodes connected between the plurality of first input terminals and the first output terminal, respectively,
The plurality of power conversion modules being respectively connected to the input connectors of each of the plurality of primary junction boxes,
Wherein the output connector of each of the plurality of primary junction boxes is directly connected to each of the plurality of input connectors of the secondary junction box,
The output connector of the secondary junction box is connected to the first and second connection wirings,
Wherein the DC power generated from the plurality of power conversion modules is supplied to the plurality of first junction box, the second junction box, the first and second connection wiring, and the plurality of And the LED lighting device is supplied to the LED lighting device. delete delete The method according to claim 1,
Wherein the plurality of power conversion modules includes a plurality of main power conversion modules and a standby power conversion module,
Wherein the number of the plurality of main power conversion modules is equal to the number of the plurality of LED lights. 5. The method of claim 4,
A switch connected between the spare power conversion module and the commercial AC power source; And
Further comprising a control unit for controlling the switch in accordance with states of the plurality of main power conversion modules,
Wherein the plurality of main power conversion modules are directly connected to the commercial AC power source through a switch. 6. The method of claim 5,
Wherein the control unit senses an output voltage of each of the plurality of power conversion modules and an output current output through the first output terminal. The method according to claim 6,
The control unit may control the switch such that the output voltage of at least one of the main power conversion modules is lower than a preset voltage reference value and the output current is smaller than a preset current reference value, On,
At least one Schottky diode coupled to the at least one main power conversion module outputting an output voltage that is lower than the predetermined voltage reference value allows the output current from the remaining main power conversion modules to be supplied to the at least one main power conversion module And the LED lighting device is prevented from flowing backward to the LED lighting device. The method according to claim 1,
A plurality of switches connected between each of the plurality of power conversion modules and the commercial AC power supply;
A memory for storing an accumulated operation time of each of the plurality of power conversion modules; And
A plurality of power conversion modules, each of the plurality of power conversion modules sensing an output voltage of each of the plurality of power conversion modules and an output current output through the first output terminal, and controlling the plurality of switches according to a state of the plurality of power conversion modules, The plurality of switches are turned on in order from the switch corresponding to the power conversion module having the short cumulative operation time stored in the memory until the output current becomes larger than the predetermined current reference value, Wherein the number of the plurality of power conversion modules is larger than the number of the plurality of LED lights. 9. The method of claim 8,
Wherein,
When a defective power conversion module having an output voltage lower than a predetermined voltage reference value is detected among the power conversion modules, a switch corresponding to the defective power conversion module is turned off,
Storing an identification number corresponding to the bad power conversion module in the memory,
And the switch corresponding to the defective power conversion module is excluded from the turn-on object switch by referring to the memory. delete delete 10. The method of claim 9,
Further comprising a number of display elements equal in number to the plurality of power conversion modules,
Wherein the control unit refers to the memory and causes the display element corresponding to the defective power conversion module to emit light in a preset color. A post that is fixed vertically on the ground;
First and second connection wirings installed in the strut and extending along the strut;
An LED lighting unit installed at an upper end of the strut;
First and second common wirings constituting the LED illumination unit and connected to the first and second connection wirings, respectively;
N ² (n is a natural number of 2 or more) LED lights constituting the LED illumination unit and connected in parallel to the first and second common wirings;
A distribution board installed at a lower end of the strut;
N ² power conversion modules provided in the distribution board to generate DC power from a commercial AC power source;
N primary junction boxes installed in the distribution board for receiving the DC power from the n ² power conversion modules;
And one secondary junction box provided in the distribution board and configured to receive the direct current power from the n primary junction boxes and output the direct current power to the first and second connection wiring,
Wherein each of the n primary junction boxes comprises:
N number of first and second input terminals from the n number of power conversion modules corresponding to n from the ^second of the power conversion module, configured to receive said DC power, respectively;
A first output terminal;
A second output terminal commonly connected to the n second input terminals; And
And n Schottky diodes connected between the n first input terminals and the first output terminal, respectively,
The secondary junction box includes:
N first and second input terminals respectively connected to the first and second output terminals of the n first-order junction boxes and configured to respectively receive the direct-current power from the n first-order junction boxes;
A first output terminal configured to be connected to the first connection wiring;
A second output terminal commonly connected to the n second input terminals and configured to be connected to the second connection wiring; And
And n Schottky diodes connected between the n first input terminals and the first output terminal, respectively.

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