KR20020063975A - Back-up Power Supply of Computer System - Google Patents

Abstract

PURPOSE: A device for supplying an auxiliary power of a computer system is provided to prevent working contents from being removed caused by a momentary power failure induced by an unstable AC power source or a power failure while the work is operated using a computer. CONSTITUTION: In a computer system(20) comprising a PC main body(21) and a monitor(22), an AC power source supplying unit(11) is provided for supplying an AC power source. A converter(12) converts an AC power source into a DC power source, and maintains a DC power source uniformly. A micro processor(C) monitors the computer system(20) and an inputted power source and a back-up battery(13) and performs a control for supplying a back-up power source at a power failure. The back-up battery(13) charges a power source being supplied from the converter(12) and supplies a power source to an inverter(14) in accordance with a command of the micro processor(C). The inverter(14) converts a DC voltage being supplied from the back-up battery(13) into an AC voltage, and supplies the AC voltage to the converter(12).

Description

Back-up Power Supply of Computer System

The present invention relates to an auxiliary power supply of a computer system, and more particularly, to prevent the work contents from disappearing due to a momentary power failure or power failure by unstable AC power during operation using a computer.

In general, if the power supply is not stable or the power disturbance occurs due to peripheral devices in the operating situation of the computer system, the working data is instantaneously destroyed or the output screen is distorted.

In order to solve such a problem, an uninterruptible power supply (UPS) is used.

The uninterruptible power supply uses bipolar switching in the vicinity of the zero voltage of the AC power supply in consideration of the difficulty in controlling the current due to the uncertainty of the inverter output value near the zero voltage during unipolar switching control. In order to reduce the switching frequency, it is a series-parallel power supply that enables the current control having a constant switching frequency by using unipolar switching.

The uninterruptible power supply has the advantage of allowing the operator to continue the work or to continue the work after the normal power is supplied after recharging the power supply to the computer system for a predetermined time in the event of power failure. Extremely complex configuration circuits, too large equipment, short battery life and limited lifespan of electrical switch operation make it difficult to manage and maintain components, resulting in increased manufacturing, maintenance, and maintenance costs. There is this high problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide an auxiliary power supply of a computer system which is stable and simple while preventing the work contents from being lost due to an instantaneous power failure or power failure by an unstable AC power supply during operation using a computer.

In order to achieve the above object, the auxiliary power supply of the computer system of the present invention is a computer system composed of a PC main body and a monitor, the AC power supply unit to which AC power is supplied, and converts AC power into DC power so that a DC voltage is constant. A microprocessor that monitors the PC and the battery and commands and controls all systems to operate in the event of a power outage; a backup battery that charges the power supplied from the converter and supplies power to the inverter at the microprocessor's command And an auxiliary power supply comprising an inverter for converting DC power supplied from the backup battery into AC power and supplying the same to the converter.

1 is a schematic block diagram showing the structure of the present invention;

2 is a block diagram embodying FIG.

<Description of the symbols for the main parts of the drawings>

10: auxiliary power supply unit 11: power supply unit

12 converter 13 backup battery

14 Inverter 20 Computer System

21: PC body 22: Monitor

C: microprocessor

1 and 2, in the computer system 20 composed of the PC main body 21 and the monitor 22, an AC power supply unit 11 for supplying AC power and AC power are converted into DC power. A converter 12 for maintaining a constant DC voltage, a microprocessor C for monitoring the computer system 20, an input power supply, and a backup battery 13 so that backup power is supplied in case of power failure, and a converter 12 Backup battery 13 to charge the power supplied from the power supply to the inverter 14 according to the command of the microprocessor (C), and converts the DC voltage supplied from the backup battery 13 to an AC voltage to convert An auxiliary power supply unit 10 composed of an inverter 14 for supplying to 12 is provided.

In the present invention configured as described above, power is supplied from the power supply unit 11 to the PC main body 21 and the monitor 22, where AC power is directly supplied to the monitor 22 and the converter 12 is supplied to the PC main body 21. Supplies AC power by converting it into DC power.

In addition, the converter 12 charges the DC voltage to the backup battery 13 by maintaining a constant DC voltage output in a state in which the main board does not overwhelm according to the control performance of the computer system 20.

At this time, the microprocessor C constantly monitors the computer system 20, the input power supply and the backup battery 13, and passes through the inverter 14 and the converter 12 from the backup battery 13 via the PC main body 21 at the time of power failure. And control so that power is supplied to the monitor 22).

For example, the microprocessor C normally monitors whether the power supplied from the power supply unit 11 is normally supplied to the PC main body 21 and the monitor 22, and the charging state of the backup battery 13 is appropriate. When the power supply is unstable and a momentary power failure or a power outage occurs for a predetermined time, the DC voltage charged in the backup battery 13 is supplied to the PC main body 21 through the inverter 12 through the inverter 14. If the main power is not supplied from the power supply unit 11, the computer system 20 operates for a predetermined time to store the data in operation and continue the operation or to save the data and wait until the normal power is supplied and then rework the control. This allows the user to enter and prevents work from being lost due to a power failure or a power outage for a certain time.

At this time, it is preferable that the monitor 22 displays the used power supply and the charge capacity of the available backup battery 13.

The auxiliary power supply of the computer system according to the present invention constantly monitors the power failure and power failure state by a microprocessor and simultaneously charges the power supplied so that the charging power is immediately supplied when the power failure and power failure state are achieved. It is effective to ensure the safety of work by preventing the disappearance of the.

In addition, the accuracy and stability of the backup power supply is improved and the structure is simple, it is a very useful invention having the effect of low production cost.

Claims (1)

In the auxiliary power supply of the computer system 20 composed of the PC main body 21 and the monitor 22, An AC power supply unit 11 for supplying AC power, a converter 12 for converting AC power into DC power to maintain a DC voltage constant, a computer system 20, an input power source and a backup battery 13 are monitored. Microprocessor C for controlling the backup power to be supplied in case of power failure, and a backup battery 13 for charging the power supplied from the converter 12 and supplying power to the inverter 14 according to the command of the microprocessor C. And an auxiliary power supply unit 10 comprising an inverter 14 for converting a DC voltage supplied from the backup battery 13 into an AC voltage and supplying the same to the converter 12. Device.