KR100739859B1 - Lighting system - Google Patents

Abstract

The present invention relates to a lighting system that can improve efficiency by simplifying the power conversion step supplied from a direct current energy source.

To this end, the lighting system of the present invention, in the lighting system using an alternative energy for generating a direct current power source, converts into a direct current energy source for generating a direct current power source, and a DC power stabilized AC power from the direct current energy source to output Including a DC ballast and a lamp driven by the AC power input from the DC ballast, further comprising an AC energy source for supplying commercial AC power, the DC energy source and AC energy source is stably linked to each other and the electrical energy It further comprises a composite power supply for outputting.

DC, Uninterruptible, Power Conversion, AC

Description

Lighting system {LIGHTING SYSTEM}

1 is a schematic structural block diagram of a lighting system according to an embodiment of the present invention;

2 is a block diagram of a lighting system according to another embodiment of the present invention.

3 is a circuit configuration diagram of each element of the DC power converter of FIG. 2;

4 is a schematic structural block diagram of a lighting system using alternative energy according to the prior art;

<Description of the symbols for the main parts of the drawings>

1: DC energy source

2: DC ballast

3: lamp

4: AC energy source

5: composite power supply

    51: DC power converter

         511: D / A converter, 512: rectifier, 513: filter

    52: AC power converter

         521: rectifier, 522: power factor control circuit, 523: D / D converter

    53: controller

6: energy storage device

7: transformers

The present invention relates to a lighting system, and more particularly to a lighting system that can improve the efficiency by simplifying the power conversion step supplied from a direct current energy source.

Today, in order to solve international environmental and energy problems, researches and developments on alternative energy are being actively conducted in each country of the world. In particular, the rising interest in alternative energy is closely related to the recent international oil price hike and the future international energy problem.

Electricity generated by the power generation system by such alternative energy is used for a light emitting device that converts electrical energy into light energy, that is, an illumination system.

Figure 4 is a schematic block diagram of a lighting system using alternative energy according to the prior art, the lighting system is an inverter for receiving a DC power from the DC energy source 100 generated by the generator to convert to an AC power (D / A: 200 and an AC ballast 300 for stabilizing power by receiving AC power output from the inverter 200 and a lamp 400 driven by AC power output from the AC ballast 300. .

At this time, the AC stabilizer 300 receives the AC power output from the inverter 200, rectifier 310 for converting the AC power into DC power through the rectifier circuit, and receives the DC power output from the rectifier After converting to a power source and outputs to the lamp 400 of the rear stage includes a 320.

However, in the conventional power generation system using alternative energy, since a DC power is generated unlike a commercial power source, in order to drive a lighting device, that is, a lamp using alternative energy, a DC power source generated from a DC energy source is converted into an AC ballast. It must be stabilized through and supplied to the lamp.

That is, the inverter 200 is converted from the DC energy source 100 to commercial AC power and then supplied to the lamp 400. The AC power output through the inverter 200 uses a ballast including a general electronic ballast. Rectified through the rectifier 310 to change back to DC power, and converts the converted DC power into an AC power suitable for driving the lamp again by using the inverter 320, so the circuit configuration And there was a drawback of complicated driving.

An object of the present invention for solving the problems according to the prior art is to provide a lighting system that can improve the efficiency of the lighting system by simplifying the conversion step of the power supplied from the direct current energy source to the load.

In addition, the present invention is configured to be stored in the energy storage device after the energy supplied in the form of current from a commercial AC power source and a direct current energy source through a common connection point, the amount of energy stored in the energy storage device and the amount of energy required by the load And continuously monitoring the amount of energy generated from the direct current energy source, thereby controlling the driving of the energy source to prevent the power supply to the load from being interrupted.

The lighting system of the present invention for solving the above technical problem, in the lighting system using alternative energy for generating a direct current power source, a direct current energy source for generating a direct current power source, and a direct current power stabilized AC power supply from the direct current energy source And a lamp driven by an AC power source inputted from the DC ballast and outputting the DC ballast, and further comprising an AC energy source for supplying commercial AC power, wherein the DC energy source and the AC energy source are stable to each other. It is further provided with a complex power supply device that is linked and outputs electrical energy.

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The composite power supply device includes a DC power converter for converting the DC power output from the DC energy source into a form of electric current that can be stored, and an AC power source for converting the AC power output from the AC energy source into a form of current that can be output. And a controller for controlling the driving of the DC power converter and the AC power converter.

The DC power converter includes a D / A inverter for converting DC power output from the DC energy source into AC power, a rectifier for converting AC power output from the D / A inverter into a stable DC power source, and the rectifier. It consists of a filter that filters out the electrical noise present in the DC power output.

The AC power converter includes a rectifier for converting AC power output from the AC energy source into a stable DC power source, a power factor control circuit for compensating a power factor of the DC power output from the rectifier, and the power factor control circuit. It is composed of D / D converter that converts DC power output from DC power.

The invention will become more apparent through the preferred embodiments described below with reference to the accompanying drawings. Hereinafter will be described in detail to enable those skilled in the art to easily understand and reproduce through embodiments of the present invention.

1 is a schematic block diagram of a lighting system according to an exemplary embodiment of the present invention, in which a DC energy source 1 generating a DC power source and a DC power source from the DC energy source 1 are converted into an AC power source. And a lamp 3 which is a load driven by an AC power source input from the DC ballast 2 and the DC ballast 2 to output. At this time, the DC ballast 2 is composed of an inverter 21 for converting the DC power output from the DC energy source 1 into an AC power that can be used stably in the load, that is, the lighting lamp (3).

According to this configuration, compared to the method of converting a few stages of power using a conventional AC ballast and then supplying AC power to the load, the DC power is directly converted into a stable AC power using the DC ballast and then the load By supplying to, the efficiency is improved.

2 is a block diagram of a lighting system according to another embodiment of the present invention. The lighting system of the present invention includes an AC energy source 4 for supplying a DC energy source 1 and commercial AC power, and the DC energy source ( 1) and the alternating current energy source 4 are reliably connected to each other and output the electric energy, and the energy storage device 6 for storing the electric energy output from the composite power supply (5). ) And a DC ballast 2 for stabilizing the DC energy output from the energy storage device 6 and outputting it to the lamp 3 serving as a load.

At this time, the composite power supply device 5 is a direct current power converter 51 for converting the direct current power output from the direct current energy source 1 into a form of electric current that can be stored and the alternating current output from the alternating current energy source 4. An AC power converter 52 for converting power into a current form that can be output, and a controller 53 for controlling the driving of the DC power converter 51 and the AC power converter 52.

In addition, since the DC power converter 51 and the AC power converter 52 are commonly connected to the energy storage device 6 through connection points, respectively, and supply energy in the form of current, the voltages are different from each other. Even energy combinations are possible.

The controller 53 is preferably configured to continuously grasp the amount of energy used in the load, that is, the lighting lamp, the remaining amount of energy stored in the energy storage device 6 and the amount of energy output from the DC power converter 51. .

As described above, the controller 53 continuously understands the energy state, and when the amount of energy required by the lamp 3 is greater than the amount of energy supplied and stored through the DC energy source 1 and the When the amount of energy supplied from the direct current energy source (1) is less than the reference value serves to drive the AC power converter 52 so that power is supplied from the alternating energy source (4) providing commercial alternating current.

For example, when using a solar cell as a direct current energy source 1, if only 1 mW is generated by the amount of sunshine of the day, and 3 mW of power is required for driving the lighting lamp 3 serving as a load, an energy storage device (6) should store 2 kW of additional power, and if the amount of remaining energy stored in the energy storage device 6 becomes too low because the supply time is long, it must supply energy from the commercial alternating energy source 4.

On the other hand, when using a solar cell, or a direct current energy source 1, 3 kW of electric power is generated by the amount of sunshine of the day, and 2 kW of power energy remaining when 1 kW is required in the load is stored in the energy storage device 6. To save it.

The DC power converter 51 includes a D / A inverter 511 for converting DC power output from the DC energy source 1 into AC power, and an AC power output from the D / A inverter 511. A rectifier 512 for converting the signal into a stable DC power supply, and a filter 513 for filtering out electrical noise present in the DC power output from the rectifier 512.

The energy storage device 6 may include at least one selected from a capacitor, a super capacitor, and a storage battery.

The DC ballast 2 is composed of a D / A inverter for converting the DC energy source stored in the energy storage device into an AC state to supply to the load.

3 is a circuit configuration diagram of each element of the DC power converter of FIG. 2, wherein a capacitor C1 is connected to both ends of the DC energy source 1, and the capacitor C1 is connected to the DC energy source 1. The D / A inverter 511 is connected to both output terminals.

The D / A inverter 511 is configured by arranging four switch elements SW1, SW2, SW3, and SW4 in a full bridge shape, and the switch elements SW1, SW2, SW3, and SW4 are formed as MOSFETs or MOSFETs. IGBT etc. are used.

The rectifier 512 is composed of four diodes D1, D2, D3, and D4, and is configured to full-wave rectify and output AC power output from the D / A inverter 511.

In this case, since a difference occurs between the voltage output from the DC energy source 1 and the voltage output through the D / A inverter 511, the D / A inverter 511 and the D / A inverter are adjusted to adjust the ratio of the output voltage. The transformer 7 is further configured between the rectifiers 512.

The input terminal of the transformer 7 is connected to the output terminal of the full bridge, and the output terminal of the transformer 7 is connected to the contacts between the diodes D1, D2, D3, D4 of the input terminal of the rectifier 512. Connected.

Adjusting the output voltage ratio using the transformer 7 is the duty ratio of the pulse width modulation (PWM) driving signal of the gate of each switch element (SW1, SW2, SW3, SW4). Controlled by adjustment, duty ratio is the conduction period divided by one period of PWM signal, and PWM drive signal of switch element (SW1, SW2, SW3, SW4) operates at least 20㎑.

As described above, since the direct current power supplied from the direct current energy source 1 is a direct current including a large amount of pulse flow components, the pulse power component is reduced and converted to a stable high-quality power state through the PWM control signal.

The transformer 7 not only adjusts the ratio of the output voltage but also electrically insulates the input side and the output side, thereby increasing stability.

In addition, the filter 513 is configured to convert the voltage of the DC power output through the rectifier 512 into a current source that can be stored in the energy storage device 6 and to filter electrical noise of the output current source. 513 may allow the inductor or inductor and the capacitor to be configured in combination.

On the other hand, the AC power converter 52 includes a rectifier 521 for converting AC power output from the AC energy source 4 into a stable DC power and a power factor of the DC power output from the rectifier 521. A power factor control circuit 522 for compensating and a D / D converter 523 for converting the DC power output from the power factor control circuit 522 into a current source that can be stored in the energy storage device 6 are output.

According to such a configuration, the energy storage device 6 is always kept in a fully charged state through the voltage output from the direct current energy source 1, and when the amount of energy used in the lighting lamp 3 as a load is high or the direct current energy When the charge amount charged through the circle 1 is low, the controller 53 generates a control signal appropriately, receives power from the commercial AC energy source 4, and stores energy in the energy storage device 6. Check it.

As described above, according to the present invention, while supplying power to the load using a DC energy source, which is an alternative energy, if the power supply from the DC energy source is not smooth, the load is driven using a commercial AC power source. It can be maintained.

As described above, the present invention has the advantage of improving the efficiency of the lighting system by simplifying the conversion step of the power by directly supplying the load by converting the DC power output from the DC energy source into a stabilized alternating current through a DC ballast. .

In addition, the present invention is configured so that the energy supplied in the form of current from a commercial AC power source and a direct current energy source is stored in the energy storage device after being commonly connected through a connection point and the amount of energy required by the load and the energy stored in the energy storage device and the direct current By continuously monitoring the amount of energy generated from the energy source to control the operation of the energy source there is an advantage that can prevent the power supply to the load is interrupted.

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many different and obvious modifications are possible without departing from the scope of the invention from this description. Therefore, the scope of the invention should be construed by the claims described to include many such variations.

Claims (10)

In a lighting system using alternative energy generating a direct current power source, A direct current energy source (1) for generating a direct current power source; A DC ballast (2) for converting and outputting the DC power stabilized AC power from the DC energy source; And Including a lamp (3) driven by the AC power input from the DC ballast (2), It further includes an AC energy source (4) for supplying commercial AC power, The DC power source 1 and the AC energy source 4 are stably connected to each other, and the composite power supply device 5 outputting electric power from the DC energy source 1 and the AC energy source 4 as electrical energy. Lighting system characterized in that it comprises a. delete The method of claim 1, The composite power supply (5); A direct current power converter (51) for converting the direct current power output from the direct current energy source (1) into a form of electric current that can be stored; An AC power converter 52 for converting an AC power output from the AC energy source 4 into a current form that can be output; and Illumination system, characterized in that consisting of a controller (53) for controlling the drive of the DC power converter (51) and the AC power converter (52). The method of claim 3, wherein The DC power converter 51 is; A D / A inverter 511 for converting DC power output from the DC energy source 1 into AC power; A rectifier 512 for converting AC power output from the D / A inverter 511 into a stable DC power source; Illumination system, characterized in that consisting of a filter for filtering out the electrical noise present in the DC power output from the rectifier (512). The method of claim 3, wherein The AC power converter 52; A rectifier 521 for converting AC power output from the AC energy source 4 into a stable DC power source; A power factor control circuit 522 for compensating the power factor of the DC power output from the rectifier 521; Illumination system, characterized in that consisting of a D / D converter (523) for converting the DC power output from the power factor control circuit (522) to a DC power. The method according to any one of claims 1 or 3 to 5, And an energy storage device (6) between the composite power supply (5) and the direct current ballast (2) for storing electrical energy output from the composite power supply (5). The method of claim 6, The energy storage device (6); And at least one selected from a capacitor, a super capacitor, and a storage battery. The method of claim 4, wherein The D / A inverter 511 is composed of switch elements SW1, SW2, SW3, and SW4 configured in a full bridge shape, and the switch elements SW1, SW2, SW3, and SW4 are MOSFETs or IGBTs. Characterized by a lighting system. The method of claim 8, The switch element (SW1, SW2, SW3, SW4) is driven by a PWM signal. The method of claim 4, wherein The filter (513) is characterized in that the inductor or inductor and the capacitor is configured in combination.

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