JP2000060024A - DC power supply - Google Patents

Abstract

(57) [Problem] To provide a load voltage compensator with a voltage control function at an output section of a charger panel, and to automatically control an output voltage by detecting a bus voltage of a distribution board installed on a downstream side. Provided is a DC power supply that constantly supplies a stable DC voltage to a load. A DC power supply device according to claim 1 is provided.
Is a DC power supply device that converts AC power into DC power, supplies the load from a switchboard to a load, and charges a storage battery. In the DC power supply device, floating charging is performed on the storage battery 6 and a downstream side of the storage battery 6 is provided. The load voltage compensator 4 with a voltage control function inserted in the output section of the charger panel 5 and the voltage of the upper bus 10 of the upper distribution board 8 which is a distribution board are detected, and the higher distribution board bus voltage signal 12 is detected. A voltage monitoring control means for outputting a voltage control signal for maintaining a predetermined voltage range to the load voltage compensating device with a voltage control function is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC power supply for electric equipment driven by a DC power supply, and more particularly to a DC power supply for controlling a DC voltage output from a storage battery and a charger.

[0002]

2. Description of the Related Art A DC power supply, which is a power supply for various electric devices driven by DC power, converts AC power supplied from an AC switchboard, which is an AC power supply, into DC power at a charger panel. This DC power is branched and supplied to a plurality of load devices via a distribution board which is a distribution board. Also,
At the time of a power failure such as the loss of the AC power, the storage battery is used as a DC power supply for the load. In order to always obtain stable DC power, the storage battery is floating-charged by the charger panel.

[0003] In the charger panel, uniform charging (overvoltage charging) is performed several times a year in order to eliminate variations in the charging state caused by self-discharge of the storage battery and to make the charging state uniform. Like that. At this time, since a higher voltage is applied to the storage battery than during the floating charge,
Make sure that the voltage to each load device that supplies DC power from the distribution board is overvoltage and does not exceed the allowable voltage range.
A load voltage compensator is provided at the output of the charger panel to suppress the output voltage from the charger panel to each load device.

[0004]

When the storage battery is charged evenly several times a year, the output voltage from the charger panel is suppressed by the load voltage compensator so that an overvoltage is not applied to each load. I have. However, each load to which DC power is supplied from this charger panel is a wide variety of devices, some of which do not operate normally and operate only at the time of blackout due to loss of AC power, etc. There are also applications where small fluctuations in the power supply voltage are required in devices and the like.

Further, even if the overvoltage is suppressed at the output section of the charger panel, the voltage at each load terminal becomes unstable depending on the operation state such as the load amount of each load device, and the load function is affected. There was a problem that it might be affected.

It is an object of the present invention to provide a load voltage compensator with a voltage control function at an output section of a charger panel, and to automatically control an output voltage by detecting a bus voltage of a distribution board installed on the downstream side. Accordingly, it is an object of the present invention to provide a DC power supply that always supplies a stable DC power to a load.

[0007]

In order to achieve the above object, a DC power supply according to the present invention converts AC power from an AC power supply into DC power and supplies it to a load via a switchboard. A DC power supply device comprising a charger panel for charging a storage battery together with the battery, performs floating charging on the storage battery, and a load voltage with a voltage control function inserted in an output section of the charger panel downstream of the storage battery. And a voltage monitoring control means for detecting a bus voltage of the switchboard and outputting a control signal for maintaining the bus voltage within a predetermined voltage range to the load voltage compensator with a voltage control function. And

When a charger panel converts AC power from an AC power supply into DC power and performs floating charging of a storage battery and supply of DC power to a load via a switchboard, a bus voltage of an upstream switchboard is used. Is detected by the voltage monitoring control means, and the output voltage from the charger panel to the switchboard is automatically controlled by the load voltage compensator with the voltage control function. Thus, the DC voltage supplied from the switchboard to the load is always stably maintained within a predetermined voltage range without being affected by the floating charging voltage for the storage battery, load fluctuation, and the like.

According to a second aspect of the present invention, there is provided a DC power supply device according to the first aspect, wherein the storage battery is subjected to floating charging and equal charging. At the time of uniform charging that applies a higher voltage than floating charging, which is carried out from the time of maintaining the function of the storage battery, the output voltage at the switchboard supplied to the load by the load voltage compensator with voltage control function automatically falls within the appropriate voltage range. Controlled.

According to a third aspect of the present invention, there is provided a DC power supply device comprising a charger panel for converting AC power from an AC power source into DC power, supplying the DC power to a load via a switchboard, and charging a storage battery. In the DC power supply device, a floating charging panel that performs floating charging on the storage battery and converts AC power from a standby AC power supply connected to a downstream side of the storage battery via a switch into DC power; A load voltage compensator with a voltage control function interposed in the output unit of the switchboard, and a control signal for detecting a bus voltage of the switchboard and maintaining the bus voltage in a predetermined voltage range to the load voltage compensator with a voltage control function. And a voltage monitoring control means for outputting.

At the time of inspection of the charger panel, switching to the spare charger panel is performed, and the DC power is supplied to the load via the floating charging of the storage battery and the switchboard. At this time, the bus voltage of the upstream switchboard is monitored by voltage monitoring and control means. And automatically controls the output voltage from the charger panel to the switchboard in the load voltage compensator with the voltage control function. Thus, the DC voltage from the switchboard to the load is stably maintained in a predetermined voltage range without being affected by the floating charging voltage for the storage battery, load fluctuation, and the like.

According to a fourth aspect of the present invention, there is provided a direct-current power supply device according to the third aspect, wherein the storage battery is equally charged together with the floating charge. When DC power is supplied from the pre-charger panel during uniform charging that applies a higher voltage than during floating charging, which is performed as appropriate from the time of maintaining the function of the storage battery, it is supplied to the load by the load voltage compensator with voltage control function The output voltage for the switchboard is automatically controlled to an appropriate voltage range.

According to a fifth aspect of the present invention, there is provided the DC power supply device according to any one of the first to fourth aspects, wherein the AC power supply from the AC power supply and the standby AC power supply is cut off when the AC power supply is lost.
A DC power supply device, wherein DC power is supplied from the storage battery via a load voltage compensation device with a voltage control function.

When the AC power supply is lost, the DC power is supplied from the switchboard to the load via the load voltage compensator with the voltage control function using the storage battery that has been performing the floating charging as a DC power supply. In this case, the output voltage to the switchboard supplied to the load by the load voltage compensator with voltage control function is:
It is automatically controlled to the appropriate voltage range.

According to a sixth aspect of the present invention, there is provided a DC power supply device comprising a charger panel for converting AC power from an AC power supply to DC power, supplying the DC power to a load via a switchboard, and charging a storage battery. In the DC power supply device, while performing floating charging on the storage battery, a load voltage compensating device with a voltage control function inserted into the output section of the charger panel downstream of the storage battery, and an arbitrary bus connected to the load And a voltage monitoring and control means for outputting a control signal for maintaining the bus voltage within a predetermined voltage range to the load voltage compensator with a voltage control function.

When a charger panel converts AC power from an AC power supply into DC power and performs floating charging of a storage battery and supply of DC power to a load via a switchboard, a bus voltage of an arbitrary switchboard is provided. Is detected by the voltage monitoring and control means, and the output voltage to the switchboard from which the bus voltage is detected from the charger panel is automatically controlled by the load voltage compensator with the voltage control function.

Thus, the DC voltage supplied from the switchboard, which has detected the bus voltage, to the load is stably controlled within a predetermined voltage range without being affected by the floating charging voltage, load fluctuation, and the like for the storage battery. .

According to a seventh aspect of the present invention, there is provided a direct-current power supply device according to the sixth aspect, wherein the storage battery is equally charged together with floating charge. The output voltage of the switchboard, which detects the bus voltage supplied to the load by the load voltage compensator with voltage control function during the equal charging that applies a higher voltage than the floating charging, which is performed as appropriate from the time of maintaining the function of the storage battery, is automatically performed. The voltage is appropriately controlled.

The DC power supply device according to the present invention comprises a charger panel for converting AC power from an AC power supply to DC power, supplying the DC power to a load via a switchboard, and charging a storage battery. In the DC power supply device, a floating charging panel that performs floating charging on the storage battery and converts AC power from a standby AC power supply connected to a downstream side of the storage battery via a switch into DC power; A load voltage compensator with a voltage control function interposed in the output section of the power supply, and a control signal for detecting the voltage of an arbitrary bus connected to the load and maintaining the bus voltage within a predetermined voltage range, Voltage monitoring control means for outputting to the load voltage compensating device is provided.

At the time of inspection of the charger panel, the battery is switched to the spare charger panel and floating power of the storage battery is supplied, and DC power is supplied to the load via the switchboard. At this time, the bus voltage of any switchboard is monitored by voltage monitoring and control means. , And automatically controls the output voltage to the switchboard which has detected the bus voltage from the charger panel in the load voltage compensator with the voltage control function. This allows
The DC voltage from the switchboard to the load, which has detected the bus voltage, is stably maintained within a predetermined voltage range without being affected by the floating charging voltage for the storage battery, load fluctuation, and the like.

According to a ninth aspect of the present invention, there is provided a DC power supply device according to the eighth aspect, wherein the storage battery is subjected to floating charging and equal charging. When DC power is supplied from the pre-charger panel during uniform charging that applies a higher voltage than during floating charging, which is performed as appropriate from the time of maintaining the function of the storage battery, it is supplied to the load by the load voltage compensator with voltage control function The output voltage to the switchboard that has detected the voltage of the generated bus is automatically controlled to an appropriate voltage range.

According to a twelfth aspect of the present invention, in the DC power supply according to the sixth to ninth aspects, when the AC power from the AC power supply and the standby AC power supply is interrupted and the AC power supply is lost,
DC power is supplied from a storage battery via the load voltage compensator with a voltage control function.

When the AC power supply is lost, the storage battery that has been performing floating charging is used as a DC power supply to supply DC power from the switchboard to the load via the load voltage compensator with a voltage control function. In this case, in any switchboard supplied to the load by the load voltage compensator with the voltage control function, the output voltage to the switchboard where the voltage monitoring and control means detects the bus voltage is:
It is automatically controlled to the appropriate voltage range.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. The first embodiment relates to claim 1 or claim 2. As shown in the block circuit diagram of FIG. 1, the DC power supply 1 receives supply of AC power from the AC switchboard 2 and converts it to DC power. A charger panel 5 including a rectifier 3 and a load voltage compensator 4 with a voltage control function for controlling a DC voltage from the rectifier 3 is provided.

The rectifying means 3 in the charger panel 5
Is connected to a storage battery 6 as an emergency DC power supply in the event of a power failure such as when AC power is lost.
On the output side of the load voltage compensator 4 with a voltage control function,
It is connected to an upper distribution board 8 and a lower distribution board 9 that supply DC power to a plurality of devices 7, 7a.

In the upper distribution board 8 and the lower distribution board 9 which are the above-mentioned distribution boards, a plurality of loads 7 are connected via an upper distribution board bus 10 and a plurality of loads 7 are connected via a lower distribution board bus 11. Are connected. Further, the load voltage compensator 4 with the voltage control function inputs the upper distribution board bus voltage signal 12 from the upper distribution board bus 10 of the upper distribution board 8 to the voltage monitoring control means 13 and outputs the voltage control signal. It is configured to input as 14.

Next, the operation of the above configuration will be described. In the DC power supply device 1, the charger panel 5 that has received AC power from the AC switchboard 2 converts the DC power into DC power in the rectifier 3, and converts the DC power to the storage battery 6 as an appropriate voltage for floatingly charging the storage battery 6. Supply. In order to drive the plurality of loads 7, 7a, the load voltage compensating device 4 with a voltage control function controls the load to an appropriate voltage for the loads 7, 7a, and then controls the upper distribution board 8 and the lower distribution board. The load is supplied to a plurality of loads 7, 7a via a panel 9.

At this time, the voltage monitoring control means 13 inputs the bus voltage of the upper distribution board bus 10 in the upper distribution board 8 as the upper distribution board bus voltage signal 12 and monitors the voltage level. . Further, the voltage monitoring control means 13 controls the voltage control signal 14 so that the voltage level in the upper distribution board bus 10 is set to a voltage appropriate for each of the predetermined loads 7, 7a.
Is output to the load voltage compensator 4 with the voltage control function.

As a result, the DC power output from the rectifier 3 is supplied to the floating charging of the storage battery 6 and is also supplied to the plurality of loads 7, 7a in the load voltage compensator 4 with the voltage control function. The voltage of the DC power is automatically controlled to an appropriate voltage level in the upper distribution board bus 10 even if the floating charging state or the driving state of the loads 7, 7a fluctuates.

Therefore, even if the state of floating charging of the storage battery 6 and the number of operating and driving states of the loads 7 and 7a fluctuate, DC power of a stable voltage is always supplied to each of the loads 7 and 7.
Since the power is supplied to the storage battery 7a, the reliability of the DC power supply of each of the loads 7, 7a driven by the DC power is improved while maintaining the sound charging function of the storage battery 6 (claim 1).

The storage battery 6 normally performs floating charging in which a DC voltage is always applied to perform charging.
From the viewpoint of maintaining the function of making the state of charge uniform by eliminating variations in the state of charge caused by self-discharging of the storage battery 6 and the like, equal charge (overvoltage charge), in which charging is performed several times a year at a higher voltage than during floating charge, is performed. Will be implemented. At the time of this uniform charging, the output voltage of the rectifier 3 is increased by switching means (not shown) in the charger panel 5, but also at this time, the upper distribution board bus voltage signal 12 is It is input to the monitoring control means 13.

The voltage monitoring and control means 13 outputs a voltage control signal 14, which is an output voltage of a voltage level appropriate for each of the loads 7, 7a, to the higher distribution board bus voltage signal 12, and outputs a load voltage compensator having a voltage control function. 4 to automatically control the bus voltage of the upper distribution board bus 10 of the upper distribution board 8 to a voltage level appropriate for each of the loads 7, 7a (claim 2).

Since the second embodiment is a modification of the first embodiment according to the third to fifth aspects, a description of the same configuration, operation and effect as those of the first embodiment will be omitted. A description will be omitted, and different parts will be described. As shown in the block circuit diagram of FIG. 2, in the DC power supply 15, the rectifier 3 of the charger panel 5 and the load voltage compensator 4 with a voltage control function shown in FIG. A switch 16 is interposed between them.

Further, between the switch 16 and the load voltage compensating device 4 having a voltage control function, an AC power source of a different system from the AC power distribution panel 2 is used as a spare AC power distribution panel for supplying AC power.
17 and the preliminary rectification means 18 and the preliminary switch connected thereto
A spare charger panel 20 comprising 19 is connected. The other configuration is the same as that of FIG.

Next, the operation of the above configuration will be described. When performing a periodic inspection of the DC power supply 15,
In this case, the switch 16 is opened to disconnect the rectifier 3 from the load voltage compensator 4 having a voltage control function. Thereafter, the auxiliary switch 19 is closed and the AC power from the auxiliary AC switchboard 17 is supplied to the auxiliary charger panel.
The DC power is converted into DC power by the 20 pre-rectifiers 18 and supplied to the load voltage compensator 4 with a voltage control function.

Thus, the inspection of the rectifier 3 is completed, the preliminary switch 19 is opened, the switch 16 is closed instead, and the DC power is again supplied from the rectifier 3
Floating charging of the storage battery 6 is directly performed by a plurality of loads 7,7.
DC power for driving a is supplied from the pre-charger panel 20 via the load voltage compensator 4 with a voltage control function.

Thus, at the time of inspection of the rectifier 3, even if the DC power supplied from the backup AC switchboard 17 and the backup rectifier 18 different from the AC switchboard 2 and the rectifier 3, the floating charge to the storage battery 6 is performed. And the load 7, 7a
, The DC power at a stable voltage level is always supplied to each of the loads 7, 7a even if the operating number and the driving state of the storage battery 6 fluctuate. The reliability as a power supply is improved (claim 3).

In addition, the storage battery 6 normally performs floating charging in which a DC voltage is always applied to perform charging.
Equal charging (overvoltage charging) in which charging is performed at a higher voltage than during floating charging, if necessary from the state of function management of the storage battery 6
Is performed. However, the load voltage compensator with the voltage control function automatically controls the bus voltage of the upper distribution board bus 10 of the upper distribution board 8 to a voltage level appropriate for each of the loads 7, 7a even at the time of the uniform charging. Claim 4).

Further, in the storage battery 6, when the AC power from the AC switchboard 2 and the standby AC switchboard 17 is interrupted and the AC power is lost, the battery is discharged in place of the AC power and applied to the loads 7, 7a. DC power to supply DC power.

Also in this case, the DC power output from the storage battery 6 is not affected by the voltage fluctuation of the storage battery 6 and the fluctuations of the loads 7, 7a in the load voltage compensator 4 with a voltage control function. The bus voltage in the upper distribution board bus 10 is always automatically controlled to an appropriate voltage level. Thus, DC power is supplied to each of the loads 7, 7a at a stable voltage, so that the reliability as a DC power supply is improved (claim 5).

In the third embodiment, claim 6 or claim 7
In this regard, in particular, since the voltage for a local load is stabilized and is a modification of the first embodiment, the description of the same configuration, operation, and effect as those of the first embodiment will be omitted. Then, different parts will be described.

As shown in the block circuit diagram of FIG. 3, in the DC power supply 21, the voltage monitoring control means 13 shown in FIG. The configuration is such that a lower distribution board bus voltage signal 22 is input from the board bus 11. The other configuration is the same as that of FIG.

Next, the operation of the above configuration will be described. In the DC power supply 21, in order to drive the plurality of loads 7, 7a, the load voltage compensator 4 with the voltage control function
After controlling the voltage to be appropriate for the loads 7 and 7a, the plurality of loads 7, 7a are controlled via the upper distribution board 8 and the lower distribution board 9.
To supply.

At this time, in the voltage monitoring control means 13, the voltage of an arbitrary bus, for example,
The bus voltage of the lower distribution board bus 11 is input as the lower distribution board bus voltage signal 22 and the voltage level is monitored, and the voltage level of the lower distribution board bus 11 is set for each of the preset loads 7a. Then, a voltage control signal 14 having a particularly appropriate voltage is output to the load voltage compensator 4 with a voltage control function.

Here, among the devices which are the loads 7, 7a driven by DC power, it is required that the fluctuation of the supplied power supply voltage is small due to the operation accuracy of the measuring instrument or the like. Sometimes.

However, in the load voltage compensator 4 with the voltage control function, the output from the rectifier 3 is provided to the floating charge of the storage battery 6 and the plurality of loads 7,
Even if the voltage of the DC power supplied also to the floating state 7a varies in the floating charging state or the driving state of the loads 7, 7a, particularly in the lower distribution board bus 11 where the lower distribution board bus voltage signal 22 is detected. Can automatically control the bus voltage to an appropriate voltage level.

Therefore, even if the state of floating charging of the storage battery 6 and the number of operating and driving states of the loads 7 and 7a fluctuate, the DC power of a stable voltage is always supplied to each of the loads 7, 7a.
Since the power is supplied to the load 7a, the load 7a in the lower distribution board 9 driven by the DC power becomes a DC power supply having a particularly small voltage change, while maintaining the sound charging function of the storage battery 6 and the operation reliability of the load 7a. The performance can be improved (claim 6).

The storage battery 6 normally performs floating charging in which a direct-current voltage is always applied for charging.
From the viewpoint of maintaining the function of making the state of charge uniform by eliminating variations in the state of charge caused by self-discharging of the storage battery 6 and the like, equal charge (overvoltage charge), in which charging is performed several times a year at a higher voltage than during floating charge, is performed. Will be implemented.

At the time of this uniform charging, the output voltage of the rectifying means 3 is increased by a switching means (not shown) in the charger panel 5. At this time, in the charger panel 5, the voltage by the lower distribution board bus voltage signal 22 is applied. The voltage control signal 14 from the monitoring control means 13 is input to the load voltage compensator 4 with a voltage control function, and the bus voltage of the lower distribution board bus 11 of the lower distribution board 9 is appropriately applied to each of the loads 7, 7a. Automatic control to a suitable voltage level (claim 7).

The fourth embodiment relates to claims 8 to 10, and is particularly for facilitating stabilization of a voltage to a local load, and is a modification of the second embodiment. A description of the same configuration, operation, and effect as those of the first and second embodiments will be omitted, and different portions will be described.

As shown in the block circuit diagram of FIG. 4, in the DC power supply unit 23, the voltage monitoring control means 13 shown in FIG. The configuration is such that the lower distribution board bus voltage signal 22 is input from the board board 11. Other configurations are the same as those in FIG.

Next, the operation of the above configuration will be described. In the DC power supply 23, in order to drive the plurality of loads 7, 7a, the load voltage compensator 4 with the voltage control function
After controlling the voltage to be appropriate for the loads 7 and 7a, the plurality of loads 7, 7a are controlled via the upper distribution board 8 and the lower distribution board 9.
To supply.

At this time, the voltage monitoring control means 13 inputs the bus voltage of the lower distribution board bus 11 of the lower distribution board 9 as the lower distribution board bus voltage signal 22 to monitor the voltage level. A voltage control signal 14 is output to the load voltage compensator 4 with a voltage control function so that the voltage level in the lower distribution board bus 11 is set to a voltage particularly suitable for each of the loads 7a set in advance.

Thus, in the load voltage compensator 4 with the voltage control function, the output from the rectifier 3 is provided to the floating charge of the storage battery 6 and the plurality of loads 7, 7 are provided.
The voltage of the DC power supplied also to the lower distribution board bus 11 which has detected the lower distribution board bus voltage signal 22, especially when the floating charging state or the driving state of the loads 7, 7a fluctuates. The bus voltage can be automatically controlled to an appropriate voltage level.

Therefore, even if the state of floating charging of the storage battery 6 or the number of operating units and the driving state of the loads 7 and 7a fluctuate, DC power of a stable voltage is always supplied to each of the loads 7 and 7.
Since the power is supplied to the load 7a, the load 7a in the lower distribution board 9 driven by the DC power is supplied to the load 7a by the DC power supply having a small voltage change, in addition to the sound charge function maintenance and management of the storage battery 6. The performance can be improved (claim 8).

The storage battery 6 normally performs floating charging in which a DC voltage is always applied to perform charging.
From the viewpoint of maintaining the function of making the state of charge uniform by eliminating variations in the state of charge caused by self-discharging of the storage battery 6 and the like, equal charge (overvoltage charge), in which charging is performed several times a year at a higher voltage than during floating charge, is performed. Will be implemented.

At the time of this uniform charging, the output voltage of the rectifier 3 is increased by switching means (not shown) in the charger panel 5.
The voltage control signal 14 of the voltage monitoring and control means 13 based on the lower distribution board bus voltage signal 22 is transmitted to the load voltage compensator 4 having a voltage control function.
To automatically control the bus voltage of the lower distribution board bus 11 of the lower distribution board 9 to a voltage level appropriate for each of the loads 7, 7a (claim 9).

Further, in the storage battery 6, when the AC power from the AC switchboard 2 and the standby AC switchboard 17 is cut off and the AC power is cut off, the storage battery 6 discharges instead of the AC power to the respective loads 7, 7a. DC power to supply DC power.

Also in this case, the DC power output from the storage battery 6 is not affected by the voltage fluctuation of the storage battery 6 and the fluctuations of the loads 7, 7a in the load voltage compensator 4 with a voltage control function. The bus voltage at the lower distribution board bus 11 is always automatically controlled to an appropriate voltage level. As a result, a stable voltage is always supplied to each of the loads 7, 7a, so that the reliability as a DC power supply is improved (claim 10).

[0060]

As described above, according to the present invention, the bus voltage level in the distribution board for supplying DC power to a plurality of loads is monitored, and the output voltage of the charger board is controlled by the load voltage compensator having the voltage control function. By appropriately controlling, it is possible to always supply a stable DC power to the load.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram of a DC power supply device according to a first embodiment of the present invention.

FIG. 2 is a circuit configuration diagram of a DC power supply device according to a second embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of a DC power supply device according to a third embodiment of the present invention.

FIG. 4 is a circuit configuration diagram of a DC power supply device according to a fourth embodiment of the present invention.

[Explanation of symbols]

1, 15, 21, 23 ... DC power supply unit, 2 ... AC switchboard, 3 ...
Rectifying means, 4 ... Load voltage compensator with voltage control function, 5 ...
Charger panel, 6: storage battery, 7: load, 8: upper distribution board, 9
... lower distribution board, 10 ... upper distribution board bus, 11 ... lower distribution board bus, 12 ... upper distribution board bus voltage signal, 13 ... voltage monitoring and control means, 14 ... voltage control signal, 16 ... switch, 17 ... Preliminary AC switchboard, 18 ... Preliminary rectification means, 19 ... Preliminary switch, 20 ... Preliminary charger panel, 22 ... Lower distribution board bus voltage signal.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinji Hirota 66-2 Horikawa-cho, Saiwai-ku, Kawasaki-shi, Kanagawa Prefecture Inside Toshiba Engineering Corporation (72) Inventor Fumio Kamoda 8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Address F-term in Toshiba Yokohama Office (reference) 5G003 AA01 BA01 DA03 DA15 5G015 FA13 GB01 HA01 JA34 JA47 JA54

Claims (10)

[Claims] 1. A DC power supply device comprising a charger panel for converting AC power from an AC power supply into DC power, supplying the DC power to a load via a switchboard, and charging a storage battery.
Floating charging is performed on the storage battery, and a load voltage compensator with a voltage control function inserted into an output section of a charger panel downstream of the storage battery, and a bus voltage of the switchboard is detected to detect the bus voltage. A DC power supply device comprising: a voltage monitoring control unit that outputs a control signal for maintaining a predetermined voltage range to the load voltage compensator with a voltage control function. 2. The direct-current power supply device according to claim 1, wherein the direct-current power supply device performs floating charging and equal charging of the storage battery. 3. A DC power supply device comprising a charger panel for converting AC power from an AC power source into DC power, supplying the DC power to a load via a switchboard, and charging a storage battery.
Floating charging is performed on the storage battery, and a preliminary charging panel for converting AC power from a preliminary AC power supply connected to a downstream side of the storage battery via a switch into DC power, and an output section of the charger panel. An inserted load voltage compensator with a voltage control function, and a voltage monitoring control for detecting a bus voltage of the switchboard and outputting a control signal for maintaining the bus voltage in a predetermined voltage range to the load voltage compensator with a voltage control function. And a DC power supply device. 4. The direct-current power supply according to claim 3, wherein the direct-current power supply performs equal charging as well as floating charging of the storage battery. 5. In the DC power supply device, when AC power from the AC power supply and the standby AC power supply is interrupted and the AC power supply is lost, DC power is supplied from a storage battery via the load voltage compensator with a voltage control function. The direct-current power supply device according to claim 1, wherein: 6. A DC power supply device comprising a charger panel for converting AC power from an AC power supply into DC power, supplying the converted power to a load via a switchboard, and charging a storage battery.
Floating charging is performed on the storage battery, and a load voltage compensator with a voltage control function inserted into the output unit of the charger panel downstream of the storage battery, and a voltage of an arbitrary bus to which a load is connected is detected. A DC power supply device comprising: a voltage monitoring control unit that outputs a control signal for maintaining a lever bus voltage within a predetermined voltage range to the load voltage compensator with a voltage control function. 7. The direct-current power supply device according to claim 6, wherein the direct-current power supply device performs floating charging and equal charging of the storage battery. 8. A DC power supply device comprising a charger panel for converting AC power from an AC power supply to DC power, supplying the DC power to a load via a switchboard, and charging a storage battery.
Floating charging is performed on the storage battery, and a preliminary charging panel for converting AC power from a preliminary AC power supply connected to a downstream side of the storage battery via a switch into DC power, and an output section of the charger panel. The inserted load voltage compensator with voltage control function, and a control signal for detecting the voltage of an arbitrary bus to which the load is connected and maintaining this bus voltage in a predetermined voltage range is transmitted to the load voltage compensator with voltage control function. A DC power supply device comprising: a voltage monitoring control means for outputting. 9. The direct-current power supply according to claim 8, wherein the direct-current power supply performs equal charging together with floating charging of the storage battery. 10. The DC power supply device supplies DC power from a storage battery via the load voltage compensator with a voltage control function when the AC power from the AC power supply and the standby AC power supply is cut off and the AC power supply is lost. The direct-current power supply device according to claim 6, wherein: