JPH02249016A - Discharge preventing circuit for power failure prevented power unit - Google Patents

Abstract

PURPOSE:To prevent the total discharge of a power failure prevented power unit even if power failure occurs for a long time by conducting a computer unit from the above power unit, protecting a disk device and stopping conduction from the above power unit when the power failure occurs. CONSTITUTION:When no power failure exists, the uninterruptive power unit 3 (UPS) is charged by a normal power unit. When power failure occurs, the normal power unit is interrupted due to the power failure, and the computer unit 7 is operated by the power unit by only charge of UPS 3. As soon as the conduction of a relay on the normal power unit-side is interrupted, a contact point R1 is opened and the contact point R2 of a relay on a computer unit-side is closed. A power failure signal is transmitted from UPS 3 to the computer unit 7 simultaneously with the start of power failure, and the computer unit 7 stops the writing of a disk 2, whereby the content of the disk 2 is protected. Then the computer unit 7 opens a contact point X and opens the contact point R2 and interrupts the energizing of its own computer unit. Thus, the total discharge of the power failure prevented power unit can be prevented when long power failure occurs.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a discharge prevention circuit for an uninterruptible power supply, and particularly to a circuit suitable for preventing a full discharge of an uninterruptible power supply during a long power outage. This invention relates to a discharge prevention circuit for a power outage device.

[Prior Art] Generally, when storing various data in a computer device, the data is often written to a disk. In this case, if a power outage occurs during writing (or reading), the data content on the disk may be destroyed.

When management is performed using a computer, the management status may be written to a disk at regular intervals, and there is a high risk of data destruction due to a power outage.

Therefore, when handling important data, an uninterruptible power supply, i.e. an uninterruptible power supply, is required.
A battery called 5upply (hereinafter abbreviated as UPS) is used, and in the event of a power outage, power is supplied from the battery to avoid data destruction.

FIG. 2 is a block diagram showing the operation of a conventional uninterruptible power supply for computer equipment.

In Fig. 2, 1' is a computer device, 2' is a disk unit (hereinafter simply referred to as a disk) of the computer device 1', and 3' is an uninterruptible power supply, that is, a UPS.
It is.

The operation of the conventional device will be explained.

First, during non-power outage, the UP S 3' is charged by the normal power source and the computer equipment 1' is energized.

Here, in the example shown in Fig. 2, the UPS 3' is always charged by the normal power supply and energized the computer equipment 1', but depending on the type of UPS, the normal power supply may be switched off from the UPS during non-power outages. Some are bypassed and supplied to computer equipment.

When a power outage occurs, the normal power supply is cut off due to the power outage, and the computer equipment 1' is operated with the power charged by the UPS 3'.

Further, at the same time as the power failure, a power failure occurrence signal is sent from the UPS 3' to the computer equipment 1', and the computer equipment 1' stops writing to (or reading from) the disk 2'.

In the event of a long power outage, computer equipment 1' will switch to UPS3.
The charge amount continues to be consumed, and eventually the battery protection circuit (not shown) of the UPS 3' is activated, and the power supply from the UPS 3' to the computer equipment 1' is stopped.

[Problems to be Solved by the Invention] According to the above-mentioned conventional technology, the UPS is completely discharged during a long power outage, and even if the power is restored after a power outage, if another power outage occurs immediately, the UPS will not be able to function for a while. Unable to cope with power outages.

The present invention has been made to solve the problems in the prior art described above, and when an uninterruptible power supply is used in computer equipment, when a long power outage occurs, the uninterruptible power supply is completely discharged. It is an object of the present invention to provide a discharge prevention circuit for an uninterruptible power supply that can prevent this.

[Means for Solving the Problems] In order to achieve the above object, the configuration of the discharge prevention circuit of the uninterruptible power supply according to the present invention is such that the discharge prevention circuit of the uninterruptible power supply according to the present invention is configured to connect a computer device having a disk and a computer device that is charged by a normal power source and is not used during a power outage. an uninterruptible power supply that supplies power, and a transmission system that transmits a power outage occurrence signal from the uninterruptible power supply to the computer equipment in the event of a power outage, wherein: between the uninterruptible power supply and the computer equipment; , contact R1 of the relay means on the normal power supply side of the uninterruptible power supply, and in the event of a power outage, the uninterruptible power supply supplies power to the computer equipment to protect the disk contents, and then the uninterruptible power supply supplies power to the computer equipment. The contact point R2 of the relay means on the computer equipment side that stops the operation is provided in parallel.

More specifically, the computer equipment is provided with a contact X, and after the disk contents are protected in the event of a power outage, this contact X is opened to open the contact R2 of the relay means of the computer equipment.

[Effect] The operation of the above technical means is as follows.

During non-power outages, the UPS is charged by the normal power supply, and
The computer equipment is energized.

When a power outage occurs, the normal power supply is cut off and computer equipment is operated using the power supplied by the UPS.

Normally, at the moment when the relay on the power supply side is de-energized, the contact R1 is opened, but the contact R2 of the relay on the computer equipment side is closed.

Simultaneously with a power outage, a power outage occurrence signal is sent from the UPS to the computer equipment, the computer equipment stops writing (or reading) to the disk, and the contents of the disk are protected.

Therefore, the computer equipment opens the contact X, de-energizes the relay on the computer equipment side, and opens the contact R2, thereby de-energizing the computer equipment itself.

Even if the power outage lasts for a long time, the computer equipment has already been turned off and the UPS itself is consuming only the power, so when the power is restored after the power outage, the UPS will use the remaining charge.
It is ready to deal with the next power outage immediately.

[Example] An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 is a configuration diagram of a discharge prevention circuit of an uninterruptible power supply for computer equipment according to an embodiment of the present invention.

In FIG. 1, 1 is a computer device, 2 is a disk unit (hereinafter simply referred to as a disk) of the computer device 1, and 2 is an uninterruptible power supply, that is, a UPS.

4 is a transmission system that transmits a power outage occurrence signal from the UPS 3 to the computer device 1 during a power outage; 5 is the contact R1 of the relay excitation coil O on the normal power supply side of the UPS 3, and 6 is the contact of the relay excitation coil 0 on the computer device 1 side. R2, 7 is a contact X provided in the computer equipment l, and this contact (X) 7
is for operating the relay excitation coil O.

The contact (R1) 5 of the relay excitation coil 0 and the contact (R2) 6 of the relay excitation coil 0 are configured in a parallel circuit between the UPS 3 and the computer equipment 7.

The operation of this embodiment will be explained.

During a non-power outage, the UPS 3 is charged by the normal power supply and the computer equipment 1 is energized.

That is, the relay excitation coil C) of the UPS 3 is energized by the normal power source, and the contact (R1) 5 is closed. In addition, contact (X) 7 of computer equipment 1 is closed, relay excitation coil 0 is energized, contact (R2) 6 is closed, and UPS
3 itself is charged and the computer 1 is energized.

When a power outage occurs, the normal power supply is cut off due to the power outage, and the power supply computer equipment 1 is operated while the UPS 3 is being charged.

In other words, the relay excitation coil O on the normal power supply side of UPS3
The moment the current is cut off, the contact (R1) 5 opens, but the contact (R2) of the relay excitation coil 0 on the computer equipment 1 side
)6 is closed.

Simultaneously with the power outage, the transmission system 4 is activated and a power outage occurrence signal is sent from the UPS 3 to the computer equipment 1, and the computer equipment 1 stops writing (or reading) on the disk, and the contents of the disk are protected.

Then, the computer equipment 1 opens the contact (X) 7,
The relay excitation coil ◎ on the computer equipment 1 side is de-energized, contact (R2) 6 is opened, and the computer equipment 1 itself is de-energized.

At this time, contact (R1) 5, contact (R2) 6, contact (
X) 7 are all open, and FIG. 1 shows this state.

Even if the power outage lasts for a long time, the computer device 1 is already powered off and the UPS 3 is only consuming power, so when the power is restored from the power outage, the UPS 3 will immediately use the remaining charge to start the next operation. can handle power outages.

=8- This embodiment has the following effects.

If a long power outage occurs while the UPS 3 is being used in the computer equipment 1, conventional technology would not be able to deal with the next power outage until the UPS 3' is recharged, but the system of this embodiment can deal with it immediately. be able to.

Note that the technology of the present invention is applicable to all computer equipment systems that use a UPS.

[Effects of the Invention] As explained in detail above, according to the present invention, when an uninterruptible power supply is used in computer equipment, when a long power outage occurs, the uninterruptible power supply is completely discharged. It is possible to provide a discharge prevention circuit for an uninterruptible power supply that can prevent this.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a discharge prevention circuit of an uninterruptible power supply for computer equipment according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the operation of a conventional uninterruptible power supply for computer equipment. . 1... Computer equipment, 2... Disk device section,
3...UPS, 4...Transmission system, 5...Contact R1,
6...Contact R2, 7...Contact X.

Claims (1)

[Claims] 1. A computer device having a disk device, and an uninterruptible power supply device that is charged by a normal power source and supplies power to the computer device during a power outage, and the uninterruptible power supply device supplies power to the computer device during a power outage. In the system including a transmission system for transmitting a generated signal, a contact point R of a relay means on the normal power supply side of the uninterruptible power supply is connected between the uninterruptible power supply and the computer equipment.
1 and a contact R2 of a relay means on the computer equipment side that supplies power from the uninterruptible power supply to the computer equipment in the event of a power outage to protect the disk device, and then stops the power supply from the uninterruptible power supply. A discharge prevention circuit for an uninterruptible power supply, characterized in that the circuit is provided with a discharge prevention circuit for an uninterruptible power supply. 2. The uninterruptible power supply according to claim 1, wherein the computer equipment is provided with a contact X, and after protecting the disk contents in the event of a power outage, the contact X is opened to open the contact R2 of the relay means of the computer equipment. Discharge prevention circuit of the device.