JPH0715318Y2 - Uninterruptible power system - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) This invention is an electrical appliance that is relatively small in personal computers, FA computers, FA devices, such as sequencers, and that suffers significant damage due to unexpected output cutoff of commercial power sources.・
The present invention relates to an uninterruptible power supply device which is preferably used in electronic equipment.

(Prior Art) Conventionally, for example, in a system of a personal computer, an FA computer, or an FA device, in order to cope with a power supply accident such as an unexpected power failure of a commercial power supply or an abnormal voltage drop caused by a load in use during its operation. There is an uninterruptible power supply,
Such an uninterruptible power supply device has, for example, a charging circuit, a battery, an inverter, and the like, and detects an abnormality in the power supply in the case of the power supply failure and supplies current from the battery. Therefore, even software assets that are in RAM of a personal computer body or the like and have not yet been protected by being transferred to a floppy disk or a hard disk are possible within a range in which the destruction can be prevented. That is, the uninterruptible power supply supplies a current to a personal computer system or the like at the time of the power failure, etc., thereby transferring the software on the RAM to a disk drive or the like, and avoiding unnecessary use of the battery thereafter. Therefore, the operation was performed so as to keep the movement to the minimum.

(Problems to be Solved by the Invention) The conventional power supply device configured as described above has the following problems. That is, although the charging power is supplied from the power supply device in the case of a power failure as described above, it is a condition that the power failure process is artificially executed, and after the completion of the power failure process, unless the switch is manually turned off, A control circuit or the like including an indicator such as an LED of the uninterruptible power supply is in operation, and thus, there is a drawback that charging power of a battery is wastefully wasted by charging for a long time in general.

In view of the above, it is an object of the present invention to provide an uninterruptible power supply device that effectively uses battery charging power, which generally requires a long time for charging, without waste.

(Means for Solving Problems) An uninterruptible power supply according to the present invention converts a direct current supplied from a commercial power source into a direct current, and outputs a set signal to a latching relay when the battery capacity is sufficient, Controls the battery that normally charges the direct current, the power supply circuit that stabilizes the direct current supplied from the battery in the event of a commercial power supply accident, the display, etc., and latches when the battery capacity is insufficient. A control circuit that outputs a reset signal to a relay; an inverter that converts at least direct current supplied from the battery into an alternating current; a control circuit that is provided between the battery and the inverter and is set by the output of the charging circuit; Power output that outputs the output of the latching relay and power failure detection circuit to the outside From a signal output terminal, an external signal input terminal for inputting an external signal to the latching relay, a through circuit for directly outputting an alternating current supplied from a commercial power supply, and a circuit switching means for switching between the inverter side and the through circuit side. It is characterized by being composed of.

(Function) When a power supply accident such as a power failure occurs and the supply of current from the commercial power supply is stopped, the circuit used is switched from the through circuit side to the side including the battery, and then the direct current of the battery output is converted to alternating current and the personal computer is used. Supplies current to computers, FA computers, and FA equipment systems. At the same time, the power failure signal from the power failure detection circuit is output to the power failure signal output terminal. Next, the power failure signal is received, preferably via an external input terminal such as a RAS terminal of an FA computer, and the power failure processing is performed on the computer side or the like according to a procedure formed by software therein. That is, in the case of an FA computer, the software on its RAM is stored on a floppy disk or hard disk.
Here, it is desirable to output a signal indicating the end of the power failure process from an external output terminal such as a RAS terminal of an FA computer or the like. The external output terminal is connected to the external signal input terminal of the uninterruptible power supply of the present invention, and this signal shuts off the latching relay.

(Embodiment) Next, an uninterruptible power supply 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 the uninterruptible power supply device of the present invention, in which an input terminal 1 is connected to an ordinary commercial 100V AC output terminal, that is, an outlet. When the power switch 2 is turned on or closed, a current is input to the uninterruptible power supply device 3 of the present invention to be in an operating state. The charging circuit 4 converts the alternating current supplied from the commercial power source into at least the direct current as described above, and also converts the voltage level into a predetermined voltage according to the characteristics of the battery described later. As the battery 5, for example, a sealed lead acid battery or the like is used.

The latching relay (keep relay) 6 is, for example, a contact 7,
It is composed of a set coil 8 and a reset coil 9.
The contact 7 of the latching relay 6 is set coil 8 by a set signal 10 output from the charging circuit 4, for example.
Is excited to be closed, and this state is maintained thereafter, but the set signal 10 is output from the charging circuit 4.
In the above state, when the reset signal is input to the reset coil 9 from the control circuit or the external signal input terminal described later, the contact 7 is opened. The power supply 12 is the battery 5
At least stabilizes the direct current output by, and converts the voltage level, for example, outputs a stabilized 12 V direct current.

The control circuit 13 controls the LED display, the inverter, etc.,
Also, the voltage level of the battery 5 is detected. When the voltage level of the battery 5 is at least immediately before the over-discharged state, the reset signal 11 is output, and the inverter operation permission signal 14 switching signal 15 and the like are output to the inverter and the switching circuit, respectively. The power failure detection circuit 16 notifies the control circuit 13 of the power failure by a power failure signal 17. The power failure signal output terminal 18 is for sending the output of the power failure detection circuit 18 to the outside and is usually connected to an external signal input terminal of a computer for FA or the like.
The power failure process is unintentionally started via software that is pre-formed inside the computer for use. The external signal input terminal 19 is connected to the external output terminal of the FA computer or the like as described above, and a signal such as the end of power failure processing is input from the FA computer or the like. The inverter 20 converts direct current supplied from the battery 5 into alternating current having a voltage of 100V, for example. The control of the frequency (50 / 60HZ) is performed by the control circuit 13 via the signal 14, for example.

The through circuit 21 is used during normal times without a power failure or the like, and operates when the current supplied to the input terminal 1 is output as it is. In the circuit switching means 22, the first contact 23 is normally closed, and the first contact 23 is opened and the second contact 24 is closed when the commercial power source is abnormal such as power failure. Switching control of the first and second contacts 23 and 24 of the circuit switching means 22 is performed via the power failure detection circuit 16 and the like. The output terminal 25 outputs 100V alternating current such as 50 or 60HZ, and therefore, the power input terminal of a personal computer system or the like is connected thereto.

Next, the operation of the uninterruptible power supply device of the present invention for preventing the over-discharge will be described. When the commercial power supply is normal, the charging circuit 4 operates and the battery is charged. At this time, the signal 10 causes the set coil 8 of the latching relay 6 to be excited and the contact 7 to be turned on, thereby performing normal operation. At this point, backup will start when there is a power outage, but at this time, the signal
Although 10 is OFF, the contact 7 is O due to its self-holding function.
The N state is retained. In this way, the battery continues to discharge, its battery capacity drops, its voltage drops, and
When 14 becomes, for example, 1.75 V / cell or less, the internal detection circuit operates to stop the inverter 23, and at the same time, the reset coil 9 of the latching relay 6 is excited by the signal 11 and the contact 7 is closed.
It turns off. As a result, the input to the power supply device 12 is cut off and the internal circuits such as the display circuit also stop operating.

Next, explaining the automatic power failure processing of the FA computer, etc., when a power failure signal is input from the power failure detection circuit 16 to the FA computer etc. through the power failure signal output terminal 18, the power failure processing is started. Then, when the power failure signal output terminal 18 inputs the external signal input terminal to the FA computer or the like, the power failure processing, that is, the software on the RAM is transferred to each disk or the like. Protected against software destruction.

Explaining the effective use of battery charging power, a signal is output from the FA computer or the like to its external output terminal, and this signal is input from the external signal input terminal 19 to the uninterruptible power supply 3 of the present invention. As a result, the latching relay 6 is reset and its operation is stopped, and useless consumption of battery charging power is suppressed.

(Effect of the Invention) As described above, the uninterruptible power supply of the present invention converts the alternating current supplied from the commercial power source into the direct current, and outputs the set signal to the latching relay when the battery capacity is sufficient, and Controls the battery that normally charges the direct current, the power supply circuit that stabilizes the direct current supplied from the battery in the event of a commercial power supply accident, the display, etc., and latches when the battery capacity is insufficient. A control circuit that outputs a reset signal to a relay; an inverter that converts at least direct current supplied from the battery into an alternating current; a control circuit that is provided between the battery and the inverter and is set by the output of the charging circuit; Output that outputs the output of the latching relay and the power failure detection circuit to the outside From an output terminal, an external signal input terminal for inputting an external signal to the latching relay, a through circuit for directly outputting an alternating current supplied from a commercial power source, and a circuit switching means stage for switching between the inverter side and the through circuit side. In the event of a power failure such as a power failure, the power failure process is executed, and after that, the uninterruptible power supply stops its operation quickly, so the data on the RAM of the FA computer etc. is a disk such as a floppy disk. It is remarkable in the industry that it can be transferred over and protected, and the charging power of the battery is effectively used, and thus, it can fully support the protection of data against the accident of commercial power supply such as an unexpected power failure. Produce an effect.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the uninterruptible power supply device of the present invention. In the figure, 1: input terminal, 5: battery, 6: latching relay, 13: control circuit, 16: power failure detection circuit, 18: power failure signal output terminal, 19: external signal input terminal, 20: inverter, 21: through circuit , 22: circuit switching means, 25: output terminal.

Claims (1)

[Scope of utility model registration request] 1. An uninterruptible power supply that supplies power to a computer and automatic production equipment in the event of a power failure, converts AC supplied from a commercial power supply into DC, and outputs a set signal to a latching relay when the battery capacity is sufficient. A charging circuit, a battery that normally stores the direct current, a power supply circuit that stabilizes at least the direct current supplied from the battery in the event of a commercial power supply failure, an indicator, etc. are controlled, and the capacity of the battery is insufficient. In the case of, a control circuit for outputting a reset signal to the latching relay, an inverter for converting at least direct current supplied from the battery into an alternating current, provided between the battery and the inverter, and set by the output of the charging circuit. A latching relay that is set according to the output of the control circuit; Data output terminal of the power failure detection circuit to an external device, an external signal input terminal for inputting an external signal from the computer or the like as a reset signal of the latching relay, and an alternating current supplied from a commercial power source. An uninterruptible power supply comprising: a through circuit for outputting as it is and a circuit switching means for switching between the inverter side and the through circuit.