JP6769864B2 - AC / DC power supply system - Google Patents

Description

The present invention relates to an AC / DC power supply system capable of supplying power not only to an AC load but also to a DC load.

DC power supply is being studied from the viewpoint of energy efficiency. Further, in recent years, a DC load such as a DC LED lighting has been developed, and a power power supply system capable of supplying DC power to the DC load is being studied because it is efficient and can reduce the number of members.
For example, in Patent Document 1, an AC / DC converter (AC / DC converter) is arranged in or near the distribution board to generate DC power, and the distribution board is separated or AC-branched into a common distribution board. A circuit and a DC branch circuit are formed to handle AC load and DC load.

Japanese Unexamined Patent Publication No. 2004-282802

As described in Patent Document 1 above, the distribution board is configured to have a DC branch circuit, so that it can handle DC loads, but it can handle only AC loads. Compared to the conventional distribution board, it is larger in the lateral direction, cannot fit in the conventional distribution board installation space, and the amount of work near the ceiling increases, which increases the burden on the operator.

Therefore, in view of such a problem, it is an object of the present invention to provide an AC / DC power supply system having good workability without having to worry about securing an installation space.

In order to solve the above problems, the invention of claim 1 is an AC distribution board in which a plurality of branch breakers are assembled to branch the drawn commercial power, and an AC / DC conversion that generates DC power from the commercial power. An AC / DC power supply system equipped with a device and a DC distribution board in which a plurality of DC branch breakers are assembled to branch the DC power generated by the AC / DC conversion device. The case, the case of the AC / DC converter, and the case of the DC distribution board are formed with the same width according to the spacing of the pillars arranged in the wall of the dwelling unit, and can be installed vertically between the same pillars. It is characterized by the fact that.
According to this configuration, the AC distribution board, AC / DC converter, and DC distribution board can be installed vertically between the studs, so it is necessary to install all the cases side by side near the ceiling as in the past. It disappears and workability can be greatly improved. And since it can be installed between studs, a large installation space can be secured, so there is no need to worry about securing the installation space, and by installing it inside the wall surface, it can be installed without protruding from the wall surface, and it can be installed in high places. It can be installed out of the way even if it is not installed.

The invention of claim 2 includes, in the configuration of claim 1, a DC voltage converter that converts DC power converted by an AC / DC converter into DC power of a different voltage, and the DC voltage converter also includes the DC voltage converter. It is characterized in that, together with a DC branch breaker that branches the DC power converted by the DC voltage converter, the case is housed in a case having the same width as the case having a width matching the distance between the columns.
According to this configuration, since DC branch electric circuits having two types of voltages can be arranged, it is possible to deal with DC devices having different voltages. In addition, it can be placed between studs like a case such as an AC distribution board, and can be installed without difficulty.

According to the invention of claim 3, in the configuration according to claim 1 or 2, a storage battery that can be used as a power source by switching to the DC power generated by the AC / DC converter is connected to the DC distribution board. , Has a DC / AC converter that is supplied with power from the branch circuit of the DC distribution board and generates AC power that matches the commercial power, and the DC / AC converter also has a case with a width that matches the spacing between the columns. It is characterized by being housed in a case of the same width.
According to this configuration, even if a power failure occurs in the commercial power source, power can be continuously supplied by the storage battery to a specific AC device such as an evacuation route lighting. The DC / AC converter can also be stored between the studs that can secure a large installation space, so there is no difficulty in securing the installation location.

The invention of claim 4 is characterized in that, in the configuration according to any one of claims 1 to 3, the DC distribution board includes a DC ground fault detection unit and a DC current measurement unit.
According to this configuration, since the DC distribution board includes a DC ground fault detection unit and a DC current measurement unit, it can be safely used even if the generated DC voltage is a high voltage, and power management is easy.

According to the present invention, the AC distribution board, the AC / DC converter, and the DC distribution board can be installed vertically between the studs, so that all the cases need to be installed side by side near the ceiling as in the conventional case. It disappears and workability can be greatly improved. And since it can be installed between studs, a large installation space can be secured, so there is no need to worry about securing the installation space, and by installing it inside the wall surface, it can be installed without protruding from the wall surface, and it can be installed in high places. It can be installed out of the way even if it is not installed.

It is a block diagram which shows an example of the AC / DC power supply system which concerns on this invention. It is an external appearance explanatory view of the AC / DC power supply system of FIG.

Hereinafter, embodiments embodying the present invention will be described in detail with reference to the drawings. 1 and 2 show an example of an AC / DC power supply system according to the present invention, FIG. 1 is a configuration diagram, and FIG. 2 is an external explanatory view. In the figure, 1 is a commercial power source that is a commercial power source drawn by a drop wire or the like, 2 is an AC distribution board that branches to supply the commercial power source 1 to a load, and 3 is an AC commercial power source that is DC. The AC / DC board that houses the AC / DC converter 3a that converts to the AC / DC converter, 4 is the DC distribution board that branches to supply the generated DC power to the DC load, and 5 is the AC / DC converter 3a. A DC / DC board containing a DC voltage converter 5a that generates a DC with a voltage different from the generated DC voltage, 6 is a DC / AC converter 6a that converts the generated DC into an AC that matches the commercial power supply again. Is a DC / AC board that houses.
Reference numeral 10 denotes studs arranged in the wall surface of the dwelling unit, and cases 11 (11a to 11e) constituting each board are arranged vertically between the studs 10.

The AC distribution board 2 is configured by assembling a main breaker (AC main breaker) 21 and a plurality of branch breakers (AC branch breakers) 22 in the case 11a. In the main breaker 21, a commercial power supply is connected to the primary side, a plurality of branch breakers 22 are connected to the secondary side, and branch electric circuits are individually connected to the secondary side of the branch breaker 22 for transmission.
In FIG. 2, the wiring and the branch electric circuit between the devices are omitted.

The AC / DC board 3 is configured by accommodating an AC / DC conversion device 3a in a case 11b, and is arranged directly below the AC distribution board 2. Then, one of the branch electric circuits of the AC distribution board 2 is connected, AC power is input, converted into a DC voltage of a predetermined voltage, and output to the DC distribution board 4. For example, a direct current having a relatively high voltage of 48 volts is generated and output.

The DC distribution board 4 is configured by assembling a DC main breaker 41 and a plurality of DC branch breakers 42 in the case 11c, and is arranged directly below the AC / DC board 3. In the DC main breaker 41, the output of the AC / DC converter 3a is connected to the primary side, and a plurality of DC branch breakers 42 are connected to the secondary side. A DC branch electric circuit (high-voltage DC branch electric circuit) is individually connected to the secondary side of the DC branch breaker 42, and even a DC load (not shown) is arranged.

Further, the DC main breaker 41 has a built-in DC ground fault detection unit 44 (shown in FIG. 1), and is configured to shut off when a DC ground fault occurs. Further, reference numeral 45 denotes a DC current measuring unit, which can measure the DC current flowing through the DC main breaker 41 to measure the power consumed by the entire DC load.

Further, as shown in FIG. 1, a storage battery 7 installed outside is connected to the DC distribution board 4, and a power source connected to the primary side of the DC main breaker 41 is connected to the DC distribution board 4. A switch 43 for switching between the output of the AC / DC converter 3a and the storage battery 7 is provided. The storage battery 7 is configured to output the same voltage as the DC voltage generated by the AC / DC converter 3a, and is installed to supply electric power in the event of a power failure.

The DC / DC board 5 is configured by assembling a plurality of DC branch breakers 52 into a case 11d accommodating a DC voltage converter 5a, and is arranged directly below the DC distribution board 4. One of the DC branch electric lines of the DC distribution board 4 is connected to the DC voltage converter 5a, and a DC having a voltage lower than the voltage generated by the AC / DC converter 3a (for example, 12 volts) is generated and output. A plurality of DC branch breakers 52 are connected to the end of this output. A plurality of DC branch electric circuits (low-voltage DC branch electric circuits) are connected to the secondary side of the DC branch breaker 52, and even a DC load (not shown) is arranged. As the DC branch breaker 52, the same one as the DC branch breaker 42 assembled on the DC distribution board 4 can be used.

The DC / AC board 6 is configured by assembling a plurality of branch breakers 62 into a case 11e accommodating a DC / AC converter 6a, and is arranged directly below the DC / DC board 5. One of the branch electric circuits in the DC distribution board 4 is connected to the DC / AC converter 6a, AC power corresponding to the commercial power source 1 is generated and output, and for example, an evacuation route is generated via the branch breaker 62. A specific load such as lighting in the corridor is sent to the connected branch electric circuit. As the branch breaker 62, the same one as the branch breaker 22 assembled to the AC distribution board 2 can be used.

The case 11a of the AC distribution board 2, the case 11b of the AC / DC board 3, the case 11c of the DC distribution board 3, the case 11d of the DC / DC board 5, and the case 11e of the DC / AC board 6 are all included. It is formed with the same width (for example, 40 cm) according to the distance between the inter-columns 10 provided at regular intervals in the wall of the dwelling unit. Further, in each case 11, a lid plate (not shown) that closes the front surface of the case 11 is butterfly-attached, and the front surface is substantially flush with the surrounding wall surface in a state where the case 11 housed in the wall surface is closed. It is configured to be.

In this way, the AC distribution board 2, the case 11b accommodating the AC / DC conversion device 3a, and the DC distribution board 4 can be installed vertically side by side between the studs 10, so that all the cases 11 can be installed as in the conventional case. It is no longer necessary to install them side by side near the ceiling, which can greatly improve workability. Since it can be installed between the studs 10, that is, in the wall surface, a wide installation space can be secured, and it is not necessary to worry about securing the installation space. In addition, it can be installed without protruding from the wall surface, and can be installed without getting in the way even if it is not installed in a high place.
Further, by providing the DC voltage converter 5a, it is possible to arrange DC branch electric circuits of two types of voltages, and it is possible to correspond to DC devices having different voltages, and the case 11d containing the DC voltage converter 5a is also an AC distribution panel. It can be arranged between the inter-columns 10 like the case 11 of the second class, and can be installed without difficulty.
Further, even if a power failure occurs in the commercial power source, power can be continuously supplied by the storage battery 7 to a specific AC device such as an evacuation route lighting, and the DC / AC conversion device 6a can also secure a large installation space of the stud 10. It can be stored in between, and there is no difficulty in securing an installation location.
In addition, since the DC distribution board 4 includes a DC ground fault detection unit 44 and a DC current measurement unit 45, it can be safely used even if the generated DC voltage is a high voltage, and power management is easy.
Since each case 11 is manufactured with the same width, it is easy to unitize with common dimensions, and even if the AC / DC power supply system is composed of a plurality of cases 11, only a few types of cases 11 can be used. Therefore, the manufacturing cost can be suppressed.

In the above embodiment, the AC / DC converter 3a is housed in the independent case 11b, but it may be housed in the same case as the DC distribution board 4.

1 ... Commercial power supply (commercial power), 2 ... AC distribution board, 3 ... AC / DC board, 3a ... AC / DC converter, 4 ... DC distribution board, 5 ... DC / DC board , 5a ... DC voltage converter, 6 ... DC / AC board, 6a ... DC / AC converter, 10 ... Interpost, 11 (11a-11e) ... Case, 21 ... Main breaker, 22 ... Branch breaker, 41 ... DC main breaker, 42 ... DC branch breaker, 44 ... DC ground fault detector, 45 ... DC current measurement unit, 52 ... DC branch breaker, 62 ... Branch breaker.

Claims (4)

An AC distribution board to which a plurality of branch breakers are assembled to branch the drawn commercial power, an AC / DC conversion device that generates DC power from the commercial power, and a DC generated by the AC / DC conversion device. An AC / DC power supply system equipped with a DC distribution board to which multiple DC branch breakers are assembled to split power.
The case of the AC distribution board, the case of the AC / DC converter, and the case of the DC distribution board are formed with the same width according to the distance between the studs arranged in the wall of the dwelling unit, and are the same. An AC / DC power supply system that can be installed vertically between studs. A DC voltage converter for converting DC power converted by the AC / DC converter into DC power having a different voltage is provided.
The DC voltage converter is also characterized in that it is housed in a case having the same width as the case having a width matching the distance between the columns, together with a DC branch breaker that branches the DC power converted by the DC voltage converter. The AC / DC power supply system according to claim 1. A storage battery that can be used as a power source by switching to the DC power generated by the AC / DC conversion device is connected to the DC distribution board.
It has a DC / AC conversion device that is supplied with power from a branch circuit of the DC distribution board and generates AC power that matches the commercial power.
The AC / DC power supply system according to claim 1 or 2, wherein the DC / AC conversion device is also housed in a case having the same width as the case having a width adjusted to the distance between studs. The AC / DC power supply system according to any one of claims 1 to 3, wherein the DC distribution board includes a DC ground fault detecting unit and a DC current measuring unit.

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