KR101253600B1 - Uninterruptible power supply - Google Patents

Abstract

PURPOSE: An integrated uninterruptible power supply device is provided to secure a free space by removing an overlapped device and increasing an installation space. CONSTITUTION: A first transformer(31) transforms a voltage level of utility power into a voltage level of a chargeable voltage in a battery. A first rectifier(33) rectifies AC power of the transformed voltage level into DC power. An inverter(44) changes the DC power discharged from the battery to the AC power. A second transformer(41) transforms the voltage level of the AC power transformed in the inverter into a driving voltage level. A first supply line supplies the AC power transformed by the second transformer into a power supply target device. [Reference numerals] (30) First power supply unit; (31) First transformer; (32) Current control means; (33) First rectifier; (40) Second power supply unit; (41) Second transformer; (42) Second rectifier; (43) Battery; (44) Inverter; (45) Third transformer; (46) Converter; (AA,BB) Commercial AC power source; (CC) AC power supply; (DD) DC power supply;

Description

Integrated Uninterruptible Power Supply {UNINTERRUPTIBLE POWER SUPPLY}

The present invention relates to an integrated uninterruptible power supply, and more particularly, to an integrated uninterruptible power supply that converts and converts AC power into direct current, and supplies DC power and AC power by using charged power when a power failure occurs.

The uninterruptible power supply charges power to a battery provided therein, and supplies a DC power to a device requiring power supply or converts it into AC power when a power failure occurs.

1 is a configuration diagram of a conventional uninterruptible power supply for DC power supply, Figure 2 is a configuration diagram of a conventional uninterruptible power supply for AC power supply.

As shown in FIG. 1, a conventional uninterruptible power supply for direct current power supply includes a first transformer 1 for converting a voltage level by receiving a commercial AC power, and an alternating voltage level at a first transformer 1. It includes a first rectifier (2) for converting the power to a direct current power source and a first battery (3) for charging the direct current power converted by the first rectifier (2).

The conventional uninterruptible power supply for DC power supply configured as described above supplies DC power charged in the first battery 3 to a device requiring power supply when a power failure occurs.

As shown in FIG. 2, the conventional uninterruptible power supply for alternating current power is supplied with a commercial AC power to convert a voltage level into a second transformer 11 and an alternating voltage level of the second transformer 11. The second rectifier 12 converts the power into DC power, the second battery 13 charging the DC power converted by the second rectifier 12, and the DC power charged in the second battery 13 when the power failure occurs. An inverter 14 for converting to a power source and a third transformer 15 for converting the voltage level of the AC power output from the inverter 14 to the voltage level of the device requiring power supply are included.

In addition, the conventional uninterruptible power supply for AC power supply has a fourth transformer 16 according to the control signal of the fourth transformer 16 and the controller (not shown) for converting the voltage level of the commercial AC power supply when no power failure occurs. Further comprising a current control means 17 for controlling the average current of the AC power source voltage is converted in the.

Therefore, the conventional uninterruptible power supply for AC power supply converts the DC power charged in the second battery 13 back to AC power when a power failure occurs and supplies it to a device requiring power supply.

As described above, in the apparatus using a DC power source and an AC power source, the uninterruptible power supply unit for the DC power supply shown in FIG. 1 and the uninterruptible power supply unit for the AC power supply shown in FIG. Had to be provided separately.

Therefore, conventionally, such as the first and second transformers (1, 11), the first and second rectifiers (2, 12), the first and second batteries (3, 13), the uninterruptible power supply for supplying DC power and The manufacturing costs of the uninterruptible power supply are increased due to the devices provided in the uninterruptible power supply for the AC power supply separately and overlapped with each other.

In addition, according to the related art, since power cables for inputting power to each uninterruptible power supply are separately provided, installation costs increase as power cable usage increases.

In addition, conventionally provided with the first and second batteries (3, 13) together, the power of the temperature control device for maintaining a constant temperature of the battery (batter room) in which the first and second batteries (3, 13) are installed There was a problem that the maintenance cost increases due to increased consumption.
On the other hand, U.S. Patent No. 7763990 (registered on July 27, 2010, hereinafter referred to as 'Patent Document 1') discloses a hybrid uninterruptible power supply system.
Hybrid uninterruptible power system according to Patent Document 1 normally supplies AC power and DC power through AC power output port, inverter module and DC power output port.
Patent Document 1 discloses that when an abnormal state of input power is detected in a monitor module detecting a state of input power, DC power charged in a battery is discharged to supply DC power through a DC power output port and discharged from the battery at the same time. The power is converted from the bidirectional converter module to AC power to supply AC power through the AC power output port.
As described above, Patent Document 1 requires a control process for controlling the bidirectional converter module using a monitor module, thus complicating the configuration and control process of the uninterruptible power supply and increasing the manufacturing cost.

U.S. Patent No.7763990 (registered July 27, 2010)

The present invention is to solve the above problems, an object of the present invention is to provide an integrated uninterruptible power supply that can supply DC power and AC power to a device that requires power supply in the event of a power failure.

It is another object of the present invention to provide an integrated uninterruptible power supply that can be configured simply by removing redundant devices to supply DC power and AC power.

According to a feature of the present invention for achieving the above object, the present invention converts the voltage level of the AC power supply to the voltage level required for driving the power supply target device in the normal power supply state to supply the AC power supply and DC power supply. A second power supply unit which charges the battery using a first power supply unit and a commercial AC power source, and converts the power discharged from the battery into a voltage level of the power supply target device when a power failure occurs to supply AC power and DC power. do.

The second power supply unit is a first conversion unit for converting a commercial AC power into a DC power of a voltage level that can be charged in the battery, a battery for charging the DC power converted from the first conversion unit, a direct current discharged from the battery when a power failure occurs And a second converting unit converting power into AC power and a third converting unit converting the DC power discharged from the battery into a voltage level required for driving the power supply target device when a power failure occurs.

The first converter includes a first transformer for converting a voltage level of a commercial AC power supply into a voltage level chargeable to the battery, and a first rectifier for rectifying an AC power whose voltage level is converted from the first transformer into a DC power source. It is characterized by.

The second converter is an inverter for converting the DC power discharged from the battery into an AC power, a second transformer for converting the voltage level of the AC power converted in the inverter to a voltage level required for driving the power supply target device and the first And a first supply line for supplying the AC power whose voltage level is converted in the two transformers to the power supply target device.

The third converter is configured to supply a DC-DC converter for converting the DC power discharged from the battery to a voltage level required for driving the power supply target device, and a DC power supply having a voltage level converted from the converter to the power supply target device. It is characterized by comprising a supply line.

The first power supply unit directly supplies a third transformer for converting the voltage level of the commercial AC power supply to a voltage level required for driving the power supply target device, and an AC power whose voltage level is converted in the third transformer directly to the power supply target device. A first supply line configured to control the output of the AC power whose voltage level is converted in the third transformer based on a control signal of the controller, and a rectifier configured to rectify the AC power output from the current control means into a DC power source. And a fourth supply line for supplying a second rectifier and a DC power rectified by the second rectifier to a power supply target device.

First and second circuit breakers are respectively installed at input terminals of the first power supply port and the second power supply unit to which the commercial AC power is supplied, and between the first rectifier and the battery and between the first supply line and the third supply line, respectively. The fourth circuit breaker is installed, and the fifth and sixth circuit breakers are installed between the third supply line, the three transformers, and the current control means, respectively.

The current control means is a triac, and the first to sixth breakers are characterized in that the mold case current breaker (MCCB).

As described above, the present invention integrates the conventional uninterruptible power supply for direct current power supply and the uninterruptible power supply for AC power supply to charge commercial AC power to the battery, and supply the DC power discharged from the battery when a power failure occurs. The DC power supply and the AC power supply required for driving the target device can be converted and supplied.

Accordingly, the present invention can simplify the configuration by removing the redundant device, thereby reducing the manufacturing cost of the uninterruptible power supply, it is possible to provide a free space for installing other devices as the installation space is reduced.

In addition, the present invention can reduce the manufacturing cost by reducing the amount of power cable used.

According to the present invention, since the heat generation amount of the battery is reduced as compared with the case in which two batteries are conventionally provided by supplying AC power and DC power when a power failure occurs using a single battery, the temperature of the space where the battery is installed is kept constant. The maintenance cost can be reduced by reducing the power consumption of the thermostat.

As a result, the present invention has the effect of reducing the manufacturing cost and maintenance cost of the uninterruptible power supply to improve the manufacturability, and can be widely applied to small devices having insufficient installation space by simplifying the configuration.

1 is a configuration diagram of a conventional uninterruptible power supply for direct current power supply.
2 is a block diagram of a conventional uninterruptible power supply for AC power supply.
3 is a block diagram of an integrated uninterruptible power supply according to a preferred embodiment of the present invention.

Hereinafter, an integrated uninterruptible power supply according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of an integrated uninterruptible power supply according to a preferred embodiment of the present invention.

As shown in FIG. 3, the integrated uninterruptible power supply 20 according to the preferred embodiment of the present invention requires a power supply for supplying a voltage level of a commercial AC power in a normal power supply state (hereinafter, 'a device for supplying power). Charges the battery 43 by using the first power supply unit 30 and the AC power supply to supply AC power and DC power by converting to a voltage level required to drive the power, and discharging from the battery 43 when a power failure occurs. And a second power supply unit 40 for converting the power to the voltage level of the power supply target device to supply AC power and DC power.

The first power supply unit 30 converts the AC power voltage of the first transformer 31 and the first transformer 31 to convert the voltage level of the commercial AC power supply into a voltage level required for driving the power supply target device. Current control means 32 for controlling the output of the AC power whose voltage level is converted in the first transformer 31 under the control of the first supply line PL1 and the controller (not shown) directly supplying the power supply target device. ), A second supply line for supplying the first rectifier 33 for rectifying the AC power output from the current control means 32 to the DC power supply and the DC power rectified in the first rectifier 33 to the power supply target device ( PL2).

The current control means 32 switches according to a control signal of a controller (not shown) to control the current output of the AC power source in which the voltage level is converted in the first transformer 31.

In the present embodiment, the current control means 32 is provided with a triac, which is a two-way three-terminal thyristor that connects two silicon controlled rectifiers (SCRs) in a reverse direction.

That is, the present invention supplies the AC power converted from the first transformer to the voltage level required by the power supply target device through the first supply line to the power supply target device, and the DC power supply from the first rectifier through the second supply line. To the power supply target device.

Accordingly, the present invention can separately supply AC power and DC power to the power supply target device through the first supply line and the second supply line.

The second power supply unit 40 includes a first conversion unit for converting commercial AC power into a DC power of a voltage level chargeable to the battery, a battery 43 for charging the DC power converted from the first conversion unit, and a battery in case of power failure ( And a second conversion unit for converting the DC power discharged from 43 into an AC power source and a third conversion unit for converting the DC power discharged from the battery 43 to a voltage level required for driving the power supply target device in the event of a power failure.

The first converting unit rectifies the AC power whose voltage level is converted from the second transformer 41 and the second transformer 41 to convert the voltage level of the commercial AC power supply into a voltage level that can be charged in the battery 43. A second rectifier 42 is included.

Accordingly, the battery 43 receives the converted DC power from the first converter and charges the internal battery cells, and discharges the charged DC power when a power failure occurs.

The second converter converts the voltage level of the inverter 44 converting the DC power discharged from the battery 43 into AC power and the AC power converted from the inverter 44 to the voltage level required for driving the power supply target device. And a third power supply line PL3 for supplying the AC power whose voltage level is converted by the third transformer 45 and the third transformer 45 to the power supply target device.

The third converting unit is provided from a DC-DC converter (hereinafter referred to as a "converter") 46 and a converter 46 for converting the DC power discharged from the battery 43 into a voltage level required for driving the power supply target device. And a fourth supply line PL4 for supplying the DC power whose voltage level is converted to the power supply target device.

Meanwhile, first and fourth breakers B1 and B4 are installed at input terminals of the first power supply unit 30 and the second power supply unit 40 to which the commercial AC power is supplied.

Second and third breakers B2 and B3 are installed between the first transformer 31 and the current control means 32 and the first supply line PL1, respectively.

In addition, fifth and sixth breakers B5 and B6 are installed between the second rectifier 42 and the battery 43 and the third supply line PL3, respectively.

The first to sixth breakers B1 to B6 are overcurrent protection breakers for protecting a circuit by cutting off current when an overcurrent is generated. In this embodiment, the first to sixth breakers B1 to B6 are provided as a mold case current breaker (MCCB).

Next, the operation of the integrated uninterruptible power supply according to the preferred embodiment of the present invention will be described in detail.

The integrated uninterruptible power supply 20 according to the preferred embodiment of the present invention supplies AC power and DC power to the power supply target device through the first power supply 30 until commercial AC power is normally supplied and a power failure occurs. Supply.

That is, the first transformer 31 of the first power supply unit 30 converts the voltage level of the commercial AC power supply into a voltage level required for driving the power supply target device.

Then, the AC power whose voltage level is converted from the first transformer 31 is directly supplied to the power supply target device through the first supply line PL1.

In addition, the current control means 32 receives the AC power whose voltage level is converted from the first transformer 31 and performs a switching operation according to the control signal of the controller to control the current output, and the first rectifier 33 The AC power output from the current control means 32 is rectified to DC power.

Then, the DC power rectified by the first rectifier 33 is supplied to the power supply target device through the second supply line PL2.

Meanwhile, the second transformer 41 of the second power supply unit 40 converts the voltage level of the commercial AC power supply into a voltage level that can be charged in the battery 43, and the second rectifier 42 converts the voltage into a second transformer 41. The rectified AC power whose voltage level has been converted is rectified with a DC power supply.

Accordingly, the battery 43 charges the battery cell inside the DC power rectified from the second rectifier 42.

If a power failure occurs, the battery 43 discharges the DC power charged therein.

Thus, the inverter 44 converts the DC power discharged from the battery 43 into AC power, and the third transformer 45 converts the voltage level of the AC power converted from the inverter 44 into the power supply target device. Convert to voltage level.

Then, the AC power whose voltage level is converted in the third transformer 45 is supplied to the power supply target device through the third supply line PL3.

On the other hand, the converter 46 of the second power supply unit converts the DC power discharged from the battery 43 into a voltage level required for driving the power supply target device, and the DC power whose voltage level is converted in the converter 46 4 It is supplied to the power supply target device through the supply line PL4.

Through the above process, the present invention integrates the conventional uninterruptible power supply for DC power supply and the uninterruptible power supply for AC power supply to charge a commercial AC power to the battery, DC power discharged from the battery when a power failure occurs Is converted into DC power and AC power required to drive the power supply target device.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is used in the apparatus for driving the DC power supply and the AC power supply to the power supply target device using the power charged in the battery in the event of a power failure.

20: integrated uninterruptible power supply 30: first power supply
31: first transformer 32: current control means
33: first rectifier 40: second power supply
41: second transformer 42: second rectifier
43: battery 44: inverter
45: third transformer 46: converter
B1 to B6: breaker PL1 to PL4: supply line

Claims (8)

A first power supply unit for supplying AC power and DC power by converting the voltage level of the commercial AC power to the voltage level required for driving the power supply target device under the normal power supply;
A second power supply unit which charges the battery using a commercial AC power source and converts the power discharged from the battery when the power failure occurs to the voltage level of the power supply target device to supply AC power and DC power;
The second power supply unit converts commercial AC power into a DC power source having a voltage level that can be charged in a battery;
Battery for charging the DC power converted from the first conversion unit,
A second conversion unit converting DC power discharged from the battery into AC power when a power failure occurs;
And a third converting unit converting the DC power discharged from the battery to a voltage level required for driving the power supply target device when a power failure occurs.
The first transformer converts a voltage level of a commercial AC power supply into a voltage level chargeable to the battery;
A first rectifier configured to rectify the AC power whose voltage level is converted from the first transformer into a DC power source,
The second converter is an inverter for converting the DC power discharged from the battery into an AC power source,
A second transformer for converting the voltage level of the AC power converted by the inverter into a voltage level required for driving the power supply target device;
And a first supply line for supplying an AC power whose voltage level is converted in the second transformer to a power supply target device.
The third conversion unit and the DC-DC converter for converting the DC power discharged from the battery to a voltage level required for driving the power supply target device;
And a second supply line for supplying a DC power having a voltage level converted from the converter to a power supply target device. delete delete delete delete The method of claim 1, wherein the first power supply unit
A third transformer for converting the voltage level of the commercial AC power supply into a voltage level required for driving the power supply target device;
A third supply line for directly supplying an AC power whose voltage level is converted in the third transformer to a power supply target device;
Current control means for controlling the output of the AC power whose voltage level is converted in the third transformer based on a control signal of the controller;
A second rectifier for rectifying the AC power output from the current control means into a DC power source;
And a fourth supply line for supplying the DC power rectified by the second rectifier to a power supply target device. The method according to claim 6,
First and second circuit breakers are respectively installed at input terminals of the first power supply unit and the second power supply unit to which the commercial AC power is supplied.
Third and fourth circuit breakers are installed between the first rectifier and the battery and the first supply line, respectively.
And a fifth and a sixth circuit breaker, respectively, between the third supply line and the three transformers and the current control means. 8. The method of claim 7,
The current control means is triac,
Wherein said first to sixth breakers are molded case current breakers (MCCBs).

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