JPH01117630A - No-brake power unit - Google Patents

Abstract

PURPOSE:To eliminate the over discharge of a battery and to prevent the breakdown of software by providing an apparatus with a relay to be reset at the time of insufficient capacity of a power failure backup battery and with a means notifying a computer of a power failure. CONSTITUTION:In an apparatus switching from a through circuit 15 to an inverter 14 getting electricity from a backup battery 5 by a switching means 16 to supply power at the time of power failure of a commercial power supply, a latching relay 6 to be reset at the time of insufficient capacity of the battery 5 is inserted into a feeder path on the battery 5 side. Also, there is provided a microprocessor 20 for transmitting a power failure notification to a computer via RS232C interface 22 and receiving a notification of completion of emergency refuge from said computer. In this manner, the over discharge of the battery 5 is eliminated and the breakdown of computer software can be prevented.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention is applicable to devices used in relatively small electrical and electronic equipment such as personal computers, which may suffer from some kind of harm due to unexpected interruption of power supply. The present invention relates to an uninterruptible power supply device, and particularly to an uninterruptible power supply device that prevents over-discharging of a built-in battery and that can notify the computer of a power outage in the event of a power outage.

(Prior Art) Conventionally, for example, in a personal computer system, there is an uninterruptible power supply system for dealing with a power failure such as an unexpected power outage of the commercial power supply or an abnormal drop in voltage caused by a load during the operation of the system. Such uninterruptible power supplies include, for example, a charging circuit, a battery, an inverter, a display, and the like, and in the event of a power failure, the power supply abnormality is detected and current is supplied from the battery. Therefore, it is possible to prevent the destruction of software assets that are built on the main memory of the personal computer's RAM but have not yet been transferred to a floppy disk, hard disk, or the like and have not been protected. That is, the uninterruptible power supply supplies current to a personal computer system, etc. during a power outage, and thereby transfers the software on the RAM to a disk drive, etc., and thereafter avoids unnecessary battery usage. It was configured to keep the movement to a minimum.

(Problems to be Solved by the Invention) However, the conventional power supply device configured as described above has the following problems. In other words, even if the above is done, the power supply device itself will remain in operation unless it is manually turned off, so the control circuit, including indicators such as LEDs, of the uninterruptible power supply will remain in operation. , which often causes the control circuit to over-discharge the battery and damage the uninterruptible power supply. Even if an uninterruptible power supply is used, if the power outage lasts for a relatively long time, the battery will run out and the software on the computer will be destroyed.

In view of the above, an object of the present invention is to provide an uninterruptible power supply in which the built-in battery is not over-discharged and the computer software is not destroyed even in a long power outage.

(Means for Solving the Problem) The uninterruptible power supply according to the present invention includes a charging circuit that converts at least AC supplied from a commercial power source into DC, a battery that stores the DC in normal times, and a power supply circuit that at least stabilizes the direct current supplied from the battery; a control circuit that controls a display, etc.; an inverter that converts the direct current supplied from the battery to at least alternating current; and a link between the battery and the inverter. a latching relay that is provided in the battery and is in a set state when the capacity of the battery is sufficient and is in a reset state when the capacity is insufficient; a through circuit that outputs alternating current supplied from a commercial power supply as it is; circuit switching means for switching between the side and the through circuit side, detecting a power outage, resetting the latching relay, and transmitting a power outage report to the computer via the R5-232G signal line; This system is characterized by comprising a microprocessor that receives notification of completion of emergency evacuation.

(Function) When a power failure such as a power outage occurs and the supply of current from the commercial power supply stops, the circuit used is switched from the through circuit side to the side containing the battery, and then the DC output from the battery is converted to AC and converted to AC power. “It supplies current to the computer system and handles the necessary protection of soft assets.

At the same time, a power failure notification is sent to the computer via the R3-232C signal line. When the computer receives such a report, the computer closes the data file, etc. that is in operation, and stores it on a disk or the like.

When the completion of such emergency evacuation is received, the latching relay is cut off.

Meanwhile, the battery voltage level is also measured.

“Then, when at least the voltage of the battery facing the over-discharge state is detected, a reset signal is output from the control circuit, which is input to the reset coil of the latching relay, etc., and the latching relay installed between the battery and the control circuit becomes the cutoff.

(Embodiment) Next, an uninterruptible power supply device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an example of an uninterruptible power supply according to the present invention, and in the figure, 1 is an AC input terminal, which is normally connected to an output terminal of a commercial 100V power supply, that is, an outlet. 2 is a power switch, and by manually turning on or closing this power switch,
A current is input to this uninterruptible power supply 3 and it becomes operational.

Reference numeral 4 denotes a charging circuit which converts the alternating current supplied from the commercial power supply as described above into at least direct current, and also converts the voltage level according to the characteristics of the battery, which will be described later. Reference numeral 5 denotes a battery, and for example, a lead storage battery or the like is used.

A latching relay (keep relay) 6 is composed of, for example, a contact 7, a set coil 8, and a reset coil 9. The contact 7 of the latching relay 6 is closed when the set coil 8 is excited by the set signal 10 outputted from the charging circuit 4, and this state is maintained thereafter. Output when running. In the above state, a reset signal 11 is output from the control circuit described later, and the reset coil 9
When input to , the contact 7 becomes open.

Reference numeral 12 denotes a DC stabilized power supply that at least stabilizes the DC output from the battery 5, converts the voltage level, and outputs, for example, a stabilized +2V DC. 13
is a control circuit that controls the LED display and the like, and also detects the voltage level of the battery 5. When the voltage level of the bubble battery 5 is at least close to its over-discharge state, the reset signal l! Output. Reference numeral 14 denotes an inverter, which converts the direct current supplied via the control circuit I3 into alternating current with a voltage toov, for example. The frequency (50H2, 60H2) is controlled by the control circuit 13, for example.

15 is a through circuit, used during normal times when there is no power outage, etc., and is an input terminal! Used when outputting the current supplied to it as is. Reference numeral 16 denotes a circuit switching means, in which the first contact 7 is closed during normal times, and when there is an abnormality in the commercial power supply such as a power outage, the first contact 17 is opened and the second contact 7 is closed.
Contact 18 is closed. Switching control of the first and second contacts 17 and 18 of the switching means 16 is provided separately and is performed via a power failure detection circuit, etc., which is not described. Reference numeral 19 denotes an output terminal, to which 100V alternating current such as 50 or 60H2 is output, so that a power input terminal of a personal computer system or the like can be connected to this.

Reference numeral 20 denotes a microprocessor, which is equipped with a memory 21 and becomes operational when supplied with current through a power supply line 22. The microprocessor 20 detects a power outage when the set signal output from the charging circuit 4 becomes, for example, a low voltage.
It becomes a serial signal through the C interface 23 and becomes the R
The signal is output to the 5-232G signal terminal 24. This R5-2
By connecting the 32G signal terminal 24 to the computer, a power failure report is sent to the computer. Here, the computer executes the emergency evacuation process, and upon completion, sends an emergency evacuation completion signal. The microprocessor 20 sends the signal to the R3-232C signal terminal 24 and R3-232.
Set 13 for receiving via C interface 23
No. 25 is output to the reset coil 9 of the latching relay 6 via the OR element 26, and the contact 7 of the latching relay 6 is output.
will be open.

(Effects of the Invention) As described above, the uninterruptible power supply of the present invention includes: a charging circuit that converts at least AC supplied from a commercial power source into DC; a battery that stores the DC in normal times;
In the event of a power failure, a power supply circuit that at least stabilizes the direct current supplied from the battery, a control circuit that controls a display, etc., an inverter that converts the direct current supplied from the battery to at least alternating current, and the battery and the inverter A latching relay is provided between the battery and is in a set state when the capacity of the battery is sufficient, and is in a reset state when the capacity is insufficient, and a through circuit that outputs the alternating current supplied from the commercial power supply as it is. , circuit switching means for switching between the inverter side and the through circuit side, detecting a power outage, resetting the latching relay, and transmitting a power outage report to the computer via an R5-232C signal line; It consists of a microprocessor that receives notification of the completion of emergency evacuation, so in the event of a power failure such as a power outage, it requests the computer to execute the necessary emergency evacuation processing to protect software assets, and after that is completed, it automatically , the supply of current to the control circuit that controls the built-in display is cut off, thus preventing the destruction of software such as created programs, and completely protecting the built-in battery from over-discharge, significantly extending its service life. It has remarkable industrial effects, such as increasing the number of

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of an uninterruptible power supply according to the present invention. In the diagram! = Input terminal 4: Charging circuit 5: Battery
6: Latching relay 13 = Control circuit 14: Inverter 16: Through circuit 16: Switching means 19: Output terminal 22: R3-232C interface.

Claims (1)

[Claims] A charging circuit that converts at least alternating current supplied from a commercial power supply into direct current; a battery that stores the direct current in normal times; a power supply circuit that at least stabilizes the direct current supplied from the battery in the event of a power failure; and a display. an inverter that converts the direct current supplied from the battery into at least an alternating current; and an inverter that converts the direct current supplied from the battery into at least an alternating current, and is provided between the battery and the inverter, and when the capacity of the battery is sufficient, it is in a set state and the capacity is changed. a latching relay that becomes a reset state when the voltage is insufficient; a through circuit that outputs AC supplied from a commercial power source as it is; a circuit switching means that switches between the inverter side and the through circuit side; and a circuit switching means that detects a power outage. An uninterruptible power supply system comprising a microprocessor that resets the latching relay, sends a power outage report to the computer via an RS-232C signal line, and receives a report from the computer indicating the completion of emergency evacuation. .