KR101695961B1 - Power conversion module, stable power supplying device and method by using it - Google Patents

Abstract

The present invention relates to a power conversion module, a stable power supply using the same, and a stable power supply method. According to a preferred embodiment of the present invention, a power generated by using light or wind is boosted or reduced A power conversion module comprising: a frequency modulation unit for setting an operation frequency at a specific frequency; A power switching unit for controlling supply of the generated power by pulse width modulation; A rectifying unit for increasing or decreasing the power generated by opening and closing the switch of the power switching unit to a preset power supply range and converting the power; A detecting unit for detecting at least one of the input power source and the power source converted through the rectifying unit; And a control unit for controlling the power switching unit and the frequency modulation unit. The power supply unit may be configured to store the boosted power supply in the capacitor when the generated power supply is boosted, and to supply the boosted power to the output side only when the power supply stored in the capacitor reaches a preset power supply range. Power conversion module is provided.

Description

Technical Field [0001] The present invention relates to a power conversion module and a stable power supply using the same, and a stable power supplying module,

The present invention relates to a power conversion module and a stable power supply device using the same and a stable power supply method. More specifically, the present invention relates to a power conversion module that converts a power generated by sunlight or wind power into a predetermined power range through a power conversion module, The present invention relates to a power conversion module and a stable power supply method using the same and a stable power supply method using the same.

In recent years, everyone is sympathetic to the fact that there is a need for eco-friendly alternative energy such as a nuclear accident caused by a tsunami in Japan, environmental pollution of chemical energy, and exhaustion of resources for generating chemical energy.

However, the environmentally friendly alternative energy has a problem that the power generation amount is smaller than that of the nuclear power plant and the chemical energy, and the power can not be supplied constantly.

Particularly, the power generated by the sunlight can supply only a small amount of time and time when the amount of sunshine is not abundant, and it is difficult to supply the power generated by the wind power and the power supply smoothly in the windy area .

The "energy charging device for hybrid power generation system" of the prior art No. 10-0993224 has been developed in order to equalize power generated by sunlight and wind power to improve charging efficiency.

The prior art includes a temperature detector for detecting a temperature rise state of the wind turbine due to overcharge or overdischarge of the wind turbine; A voltage detector for recognizing an output voltage of the two generators; A switching unit for intermittently controlling power supplied from each generator and power applied to the battery; A boosting circuit part for selectively boosting the generated voltage of each generator; And the output voltage of the two generators. When the overdischarge state of the battery is recognized from the temperature detector, the generator voltage of the two generators is regulated to the reference value voltage to charge the battery, If the output voltage of the two generators is equal to or lower than the reference value, if any one of the high output voltages is charged by boosting but the charging rate of the battery is low, And a control unit for operating and controlling the switching unit so as to increase the voltage of one output voltage. The above-described prior art can prevent deterioration of the durability of the system due to the difference in power supplied from the wind power generation system and the solar power generation system, and can improve the charging efficiency of the power generation system, have.

However, the above-mentioned prior art has a problem in that it can not provide a solution for allowing a voltage generated by sunlight or wind power to be supplied directly to the load side without a battery, It is unnecessary to waste the voltage supplied from the side where the voltage is relatively small and the voltage is very small and the voltage can not be used as it is when the voltage is increased. , Resistance, and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a method and apparatus for automatically increasing / decreasing a voltage according to the size of a power source generated based on a preset power source range, / ≪ / RTI > static power supply.

It is another object of the present invention to provide a stable power supply device capable of transferring a power generated by sunlight or wind power to a load without consuming it unnecessarily or charging the battery.

According to an aspect of the present invention, there is provided a power conversion module for converting a power generated by using light or wind into a predetermined power source range, A frequency modulator for setting an operating frequency; A power switching unit for controlling supply of the generated power by pulse width modulation; A rectifying unit for increasing or decreasing the power generated by opening and closing the switch of the power switching unit to a preset power supply range and converting the power; A detecting unit for detecting at least one of the generated power source and the power source converted through the rectifying unit; And a control unit for controlling the power switching unit and the frequency modulation unit. The power supply unit may be configured to store the boosted power supply in the capacitor when the generated power supply is boosted, and to supply the boosted power to the output side only when the power supply stored in the capacitor reaches a preset power supply range. Power conversion module is provided.

According to still another preferred embodiment of the present invention, the inrush current limiting unit limits the input of excessive current to the front end of the frequency modulation unit.

According to another preferred embodiment of the present invention, in the stable power supply using the power conversion module, the stable power supply includes an input unit to which power is supplied; An output unit for transmitting the converted power to at least one of a battery unit and a load; When the size of the power supplied to the input unit is smaller than a predetermined power range, the power is boosted by the power conversion module and stored in the capacitor, and when the stored power reaches the preset power range, A step-up switching unit A static pressure switching unit for transmitting the power supplied to the input unit to the output unit when the size of the power supplied to the input unit corresponds to a preset power supply range; A decompression switching unit for decompressing the power supply to a predetermined power supply range using a power conversion module when the size of the power supplied to the input unit is greater than a predetermined power supply range and to transmit the reduced power to the output unit; A power detector for detecting at least any one of a magnitude of power supplied to the input unit and a magnitude of power supplied to the output unit; And an integrated controller for controlling the step-up switching unit, the constant-voltage switching unit, and the power detection unit.

According to still another preferred embodiment of the present invention, when the size of the power supplied to the input unit is larger than a predetermined power range, the stable power supply using the power conversion module may use a predetermined power And a decompression switching unit for decompressing the decompression voltage to a predetermined range and delivering the decompressed voltage to the output unit, wherein the integrated control unit further includes the decompression switching unit.

According to another preferred embodiment of the present invention, the battery unit includes at least two battery modules, and the battery module includes a battery and a changeover switch for interrupting / supplying power to the battery unit, And a battery detector for detecting a power source to be supplied and a power source to be charged at the rear stage.

According to still another preferred embodiment of the present invention, the battery unit controls the changeover switch and the battery detector, and a battery controller for automatically charging the battery with a small charge amount according to the magnitude of the battery residual amount detected and stored in real time And the like.

According to another preferred embodiment of the present invention, there is provided a stable power supply method using the power conversion module, comprising the steps of: a) supplying generated power to an input of a stable power supply including a power conversion module; b) detecting a magnitude of the supplied power source; c) activating the step-up switching unit when the size of the detected power source is smaller than a predetermined power source range, activating the constant-voltage switching unit when the detected power source size corresponds to a predetermined power source range, Operating the reduced pressure switching unit when the power supply voltage is greater than a predetermined power supply range; and d) transferring power from the switching unit to the battery unit through the output unit.

According to still another preferred embodiment of the present invention, after the step d), e) a battery controller which automatically detects the amount of battery remaining in the battery in accordance with the size of the battery residual amount detected and stored in real time through the battery detector included in the battery part, And charging the battery.

According to the present invention, the following effects can be obtained.

First, there is an effect that the power generated by the wind or solar light is constantly and stably supplied to the battery unit or the load.

Second, even if the size of the power generated by the wind or sunlight is very small, it can be supplied to the battery without unnecessarily consuming it, thereby increasing the efficiency of generating the environmentally friendly power source.

1 is a schematic diagram of a power conversion module according to an embodiment of the present invention.
2 is a schematic diagram of a stable power supply using a power conversion module according to an embodiment of the present invention.
3 is a schematic diagram of a battery unit according to an embodiment of the present invention.
4 is a flowchart of a stable power supply method according to an embodiment of the present invention.
5 is a flowchart of a power conversion step according to an embodiment of the present invention.
6 is a flowchart of a power conversion step according to another embodiment of the present invention.
7 is a flowchart of a power conversion step according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, however, it is to be understood that the present invention is not limited to the disclosed embodiments.

1 is a schematic diagram of a power conversion module 100 according to an embodiment of the present invention.

The power conversion module 100 according to the present embodiment allows the power generated by using light or wind to be boosted or reduced in pressure to a preset power supply range and includes a frequency modulation unit 110, A rectifying unit 130, a detecting unit 140, and a controller 150.

The frequency modulator 110 sets the operating frequency at a specific frequency.

For example, the frequency modulator 110 may be set to 70 kHz and may be appropriately adjusted according to the magnitude of the input power source.

The power conversion module 100 according to an embodiment of the present invention can adjust power supply by a PWM (Pulse Width Modulation) method.

The power switching unit 120 controls the supply of the generated power by pulse width modulation.

The power supply switching unit 120 may be an insulated gate bipolar transistor (iGBT) or a triac diode.

The rectifying unit 130 boosts or reduces the power generated by the switch opening / closing of the power switching unit 120 to a predetermined power source range and converts the power.

The detecting unit 140 detects at least one of the generated power source and the power source converted through the rectifying unit 130.

The detecting unit 140 may detect a current output from the power switching unit 120 through the rectifying unit 130 according to an exemplary embodiment of the present invention.

The control unit 150 controls the power switching unit 120 and the frequency modulation unit 110.

The control unit 150 controls the switching operation of the power switching unit 120 to control the size and shape of the output voltage. The control unit 150 controls the size and shape of the output voltage corresponding to a predetermined power supply range Can be selected, and the selected and converted voltages can be output. For example, when the preset power source range is 48V +/- 1V, the controller 150 compares the power source size calculated by the current value detected by the detector 140 with a predetermined power source range and outputs The power switching unit 120 may be controlled.

The power conversion module 100 may be set to store the boosted power supply at the time of stepping up the generated power supply in a capacitor and to be supplied to the output side only when the power stored in the capacitor reaches a preset power supply range.

For example, when the step-up voltage of the generated power source is raised to reach a predetermined power source range, the boosted power source is stored in the capacitor. However, if the current is very low, So that a stable power source can be supplied. It can be understood that the voltage and current ranges are all included in the preset power source range.

A generated power of about 90V to 230V can be used. However, since the generated power of about 7V to 300V can be used through the power conversion module 100 of the present embodiment, unnecessary power consumption Is rarely generated.

The predetermined power source range is set in advance in the integrated control unit 800 of the stable power supply apparatus 10 using the power conversion module 100 of the present embodiment. The power source generated by light or wind is converted into an appropriate range of power source To be charged and / or loaded to the battery 912 in a stable manner.

The power supply range may be set to have a specific voltage and a peripheral voltage, for example, 24V + 1V or 48V + 1V, but is not limited thereto.

The inrush current limiting unit 160 may limit the input of excessive current to the front end of the frequency modulating unit 110 of the power conversion module 100 according to an embodiment of the present invention.

The inrush current limiting unit 160 may be used to limit a high current that can flow instantaneously when a power generated by light or wind is supplied to the power conversion module 100. For example, , A thermistor, and a silicon controlled rectifier (SCR).

2 is a schematic diagram of a stable power supply 10 using a power conversion module 100 according to an embodiment of the present invention.

2, the stable power supply apparatus 10 using the power conversion module 100 according to the present embodiment includes an input unit 200 to which power is supplied, And a load, a step-up switching unit (400) for step-up by using the power conversion module (100) according to the size of the supplied power, A power source detecting unit 700 for detecting a power source, and an integrated controller 800 for controlling the same.

The stable power supply apparatus 10 using the power conversion module 100 according to the present embodiment may further include a reduced pressure switching unit 600 for reducing the power using the power conversion module 100, The pressure reduction switching unit 600 is also controlled by the integrated control unit 800.

Generally, the power generated by the light is smaller than the power generated by the wind, and there is a limit to the supplied power. Therefore, it is often unnecessary to decompress the power. However, In the case of a power source generated by this high wind, it is preferable to include the reduced pressure switching unit 600, but it is not limited thereto.

When the magnitude of the power supplied to the input unit 200 is smaller than a predetermined power range, the step-up switching unit 400 boosts the power using the power conversion module 100 and stores the power in the capacitor, When the power source reaches the preset power source range, the power source is transmitted to the output unit 300.

The step-up switching unit 400 includes a power conversion module 100 for boosting the size of the power source, a boost capacitor 420 for storing the boosted power through the capacitor through the power conversion module 100, And a step-up switch 410 for connecting / disconnecting the power supply to the switching unit 400 and the output from the step-up switching unit 400.

When the size of the power supplied to the input unit 200 corresponds to a preset power source range, the static pressure switching unit 500 transmits the power to the output unit 300.

The static pressure switching unit 500 includes a static pressure switch 510 for supplying power to the static pressure switching unit 500 and connecting / disconnecting the output from the static pressure switching unit 500.

The constant-voltage switching unit 500 may be configured such that when a part (for example, a voltage) of the supplied power corresponds to a predetermined power source range and a part (for example, a current) does not correspond to a predetermined power source range And a static pressure capacitor 520 for storing the supplied power through a capacitor.

When the magnitude of the power supplied to the input unit 200 is greater than a preset power range, the pressure reducing unit 600 reduces the power to a predetermined power range using the power conversion module 100, 300).

The depressurizing switch 600 is connected to a power conversion module 100 for reducing the size of the power source and a power supply to the depressurizing switch 600 and an output of the depressurized power source through the power conversion module 100 / RTI > switch 610 for shutting off the < / RTI >

The pressure-increasing switch 410, the constant-pressure switch 510, and the pressure-reducing switch 610 may be set to operate independently or independently when they are made of two or more switches.

The stable power supply 10 according to another embodiment of the present invention includes a power supply unit 400 connected to one end of the output 300 of the step-up switching unit 400, the constant-voltage switching unit 500, And an additional capacitor 650 may be further provided to store the input signal and supply the signal to the output unit 300. The additional capacitor 650 may further serve as a buffer for stable power supply in an emergency.

The power detecting unit 700 detects at least one of the size of the power supplied to the input unit 200 and the size of the power transmitted to the output unit 300.

The power detector 700 may be provided in at least one of the input unit 200 and the output unit 300 to detect the size of the power source so that the supplied power source can be compared with a predetermined power source range. The integrated controller 800 detects that the supplied power is supplied to the voltage raising switching unit 400 and the constant voltage switching unit 500, And the pressure reduction switching unit 600, as shown in FIG.

The integrated control unit 800 of the present embodiment includes the voltage step-up switching unit 400, the constant voltage switching unit 500, the pressure reduction switching unit 600, and the power source detection unit 700. The power source detection unit 700 The detected power source size is compared with a predetermined power source range, and the operations of the voltage step-up switching unit 400, the constant voltage switching unit 500, and the pressure reduction switching unit 600 are controlled according to the predetermined power source range, .

The integrated control unit 800 is configured to enable the unattended operation of the stable power supply unit 10 or to notify the administrator of abnormality through the temperature sensing of the stable power supply unit 10 itself, (Not shown) that provides the user with the required information.

The integrated controller 800 may include a microcomputer and may be configured to control the respective modules including the operation management module by using a microcomputer.

3 is a schematic diagram of a battery unit 900 according to an embodiment of the present invention.

The power transmitted through the output unit 300 through either the boosting switching unit 400, the constant-voltage switching unit 500, or the reduced-pressure switching unit 600 is supplied to at least one of the load and the battery unit 900 .

3, the battery module 900 includes at least two battery modules 910. The battery module 910 includes a battery 912 and a switch 911 for interrupting / A switch 914 is provided.

The changeover switch 914 may be a device capable of switching at a high speed so that charging of each battery module 910 can be rapidly performed. For example, an insulated gate bipolar transistor (iGBT), a field effect transistor ), Triac (Triac) devices can be used. Since the iGBT and the MOSFET can be controlled only in one direction, it is preferable to use a non-contact triac device for bidirectional control, but it is not impossible to use the unidirectional switching device or the contact type triac device.

The changeover switch 914 opens the supply side changeover switch 914 of the charged battery 912 when charging of the battery 912 is completed by using a high-speed switching element having a high operation speed and a small power loss , It is possible to shorten the time for short-circuiting the supply side change-over switch 914 by finding the battery 912 to be charged next time, so that quick charging can be easily performed.

The battery detector 920 may further include a battery detector 920 for detecting a power source and a power source to be supplied to at least one of a front end and a rear end of the battery unit 900, It is also possible to arrange them at the front end and the rear end.

The battery unit 900 controls the changeover switch 914 and the battery detector 920 to automatically charge the battery 912 with a smaller charge amount according to the size of the battery remaining amount detected and stored in real time. A controller 930 may be further included.

The battery controller 930 displays at least one of the voltage, the current, the charged state, and the consumed amount of each battery 912, and notifies the manager when the voltage reaches the preset value or goes out of the preset value And a notification and display function for displaying the status.

The battery controller 930 can maintain the charging for a predetermined time interval even if the battery 912 is detected as being charged when the battery 912 is charged. The predetermined time interval may be, for example, 20 to 30 minutes. In order to prevent a false voltage displayed as a buffer even though the voltage and the current are not fully charged due to an increase in the charging voltage, Can be set to complete the substantial charging by allowing the charging of the battery 912 to continue for a time interval.

The load (not shown) may be any of various known devices using a power source, and may be used regardless of any device using a power source, and thus a detailed description thereof will be omitted.

4 is a flowchart of a stable power supply method according to an embodiment of the present invention.

The stable power supply method using the power conversion module 100 according to the present embodiment includes generating power, supplying the input unit 200, detecting a power source, converting power, and delivering the output unit 300 .

Hereinafter, a stable power supply method using the power conversion module 100 will be described in detail with reference to the drawings.

a) Generation of the power source and supply of the input unit 200

The power generated by light or wind is supplied to the input unit 200 of the stable power supply unit 10 including the power conversion module 100 through various stages (S100).

The various steps may be accomplished with a surge or filter to provide good quality power and may include a conversion module to convert the alternating current to direct current or direct current to alternating current. A conversion module including a silicon controlled rectifier may be used for rectification of the power source, for example, a thyristor may be used.

b) power detection step

The power detection unit 700 of the stable power supply apparatus 10 detects the magnitude of the supplied power (S200).

The power detector 700 detects a voltage and / or a current and transmits the detected value to the integrated controller 800, and the integrated controller 800 may store the transmitted detection value.

c) Power conversion step

The integrated controller 800 of the stable power supply apparatus 10 operates the boost switching unit 400 when the detected power supply size is smaller than a preset power supply range, The control unit 300 activates the static pressure switching unit 500 and activates the depressurization switching unit 600 when the detected power level is greater than a preset power level.

5 is a flowchart of a power conversion step according to an embodiment of the present invention.

The stable power supply 10 according to the present invention may include a constant voltage switching unit 500 and a reduced voltage switching unit 500 when the power generated by the light or wind does not reach a preset power supply range of 48V The switching unit 400 of the voltage step-up switching unit 400 is short-circuited and the power is supplied to the step-up switching unit 400. The supplied power is supplied to the power conversion module 100 for step- The voltage can be increased.

At this time, even if the voltage is boosted to 48 V, since the actual current is very low, the boosted power is stored through the boosting capacitor 420, and when the stored power has sufficient current, it is transmitted to the output unit 300 .

6 is a flowchart of a power conversion step according to another embodiment of the present invention.

In the stable power supply 10 of the present invention, in the case where the power generated by the light or wind corresponds to a voltage equal to or slightly smaller than the predetermined power of 48 V, The control unit 400 and the pressure reduction switching unit 600 are opened and the constant pressure switch 510 of the constant pressure switching unit 500 is short-circuited to supply power to the constant pressure switching unit 500, If not, it can be stored through the static pressure capacitor 520, and if it has a sufficient current, it can be directly transmitted to the output unit 300.

7 is a flowchart of a power conversion step according to another embodiment of the present invention.

The stabilized power supply 10 according to the present invention may be configured such that when the power generated by the light or wind is much larger than 48 V which is a preset prescribed power source and exceeds 100 V, And the static pressure switching unit 500 are opened and the pressure reducing switch 610 of the pressure reducing switching unit 600 is short-circuited and the power is supplied to the pressure reducing switching unit 600, The voltage can be reduced to a voltage of 48 V via the capacitor 100.

At this time, since the decompressed power source still has a large current, it is directly transmitted to the output unit 300 without being stored in the capacitor.

d) transmitting the output unit 300

The power passing through each switching unit is transmitted to the battery unit 900 through the output unit 300 (S400).

For reference, the power supplied to the output unit 300 is connected to a load, so that the power converted from the stable power supply unit 10 as a load can be converted through the inverter to supply stable power to the load The battery 912 that has been fully charged and the battery 912 in which the remaining amount is present in an emergency such as the supply of the generated power is stopped for a certain period of time or the like, Can be stably supplied.

e) Automatic battery selection charge phase

The method for supplying stable power using the power conversion module 100 according to an exemplary embodiment of the present invention further includes an automatic selection charging step for automatically charging the battery 912 with power supplied to the battery unit 900 (S500).

The step S500 includes a battery detecting step S510, a battery selecting step S520, a battery charging step S530, and a subordinate battery selecting step S540.

In the battery detection step, the remaining amount of the battery 912 is detected in real time through the battery detector 920 included in the battery unit 900 (S510).

Next, in step S520, the battery controller 930 automatically searches for and selects a battery 912 having a small charge amount according to the stored remaining battery amount.

The battery controller 930 charges the selected battery 912 using the power supplied from the output unit 300 of the stable power supply unit 10 in operation S530.

The battery controller 930 automatically selects a battery 912 having the next lowest battery remaining amount when it is determined that the selected battery 912 is completely charged (S540) Battery 912 selection, etc. may be accomplished by repeating each step of the battery charging method described above.

When the charging of the selected battery 912 is indicated as being completed, even if it is detected that the battery 912 is fully charged by voltage detection as described above, it is determined that the charging is completed after the charging is maintained for a predetermined time interval And may be displayed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And the embodiments are also within the scope of the present invention defined by the following claims.

10: Stable power supply
100: power conversion module 110: frequency modulation unit
120: power supply switching unit 130:
140: Detection unit 150:
160: Inrush current limiting unit
200: input unit 300: output unit
400: step-up switching unit 500: constant-voltage switching unit
600: Decompression switching unit 700: Power supply detection unit
800:
900: Battery compartment 910: Battery compartment
912: Battery 914: Changeover switch
920: Battery detector 930: Battery controller

Claims (8)

The present invention relates to a power conversion module (100) capable of converting power generated by using light or wind to a preset power supply range,
A frequency modulator 110 for setting an operating frequency at a specific frequency;
A power switching unit 120 for adjusting the supply of the generated power by pulse width modulation;
A rectifying unit 130 for boosting or reducing the voltage of the power generated by the switching of the power switching unit 120 to a preset power supply range and converting the power;
A detecting unit 140 for detecting at least one of the generated power source and the power source converted through the rectifying unit 130;
A controller 150 for controlling the power switching unit 120 and the frequency modulator 110; And
And an inrush current limiting unit 160 included in a front end of the frequency modulation unit 110 to limit an input of an excessive current,
Wherein the boosted power source is stored in the capacitor when the generated power source is boosted, and is supplied to the output side only when the power source stored in the capacitor reaches a preset power source range.
delete In the stable power supply device (10) using the power conversion module (100) of claim 1,
The stable power supply unit 10 includes an input unit 200 to which power is supplied;
An output unit 300 for transmitting the converted power to at least one of the battery unit 900 and the load;
When the size of the power supplied to the input unit 200 is smaller than a predetermined power range, the power is boosted using the power conversion module 100 and stored in the capacitor. When the stored power reaches the predetermined power range A step-up switching unit 400 for transmitting the signal to the output unit 300;
A constant voltage switching unit 500 for transmitting the power to the output unit 300 when the power supplied to the input unit 200 corresponds to a preset power supply range;
When the magnitude of the power supplied to the input unit 200 is greater than a predetermined power range, the power is reduced to a predetermined power range using the power conversion module 100, (600);
A power detector 700 for detecting at least one of a magnitude of power supplied to the input unit 200 and a magnitude of power supplied to the output unit 300; And
And an integrated controller 800 for controlling the step-up switching unit 400, the constant-voltage switching unit 500, the pressure-reducing switching unit 600, and the power detecting unit 700. [ Power supply.
delete 4. The method of claim 3,
The battery unit 900 includes at least two battery modules 910,
The battery module 910 includes a battery 912 and a changeover switch 914 for interrupting or allowing the supply of power to the battery module 910. The battery module 910 includes a battery 910, And a battery detector (920) for detecting the battery voltage of the battery.
The method of claim 5,
The battery unit 900 controls the changeover switch 914 and the battery detector 920 to automatically charge the battery 912 with a smaller charge amount according to the size of the battery remaining amount detected and stored in real time. And a controller (930). ≪ RTI ID = 0.0 > [0002] < / RTI >
In the stable power supply method using the power conversion module (100) of claim 1,
a) providing the generated power to the input 200 of the stable power supply 10 including the power conversion module 100;
b) detecting a magnitude of the supplied power source;
c) activating the step-up switching unit (400) when the detected power source size is smaller than a predetermined power source range, and operating the constant-voltage switching unit (500) when the detected power source size corresponds to a preset power source range Operating the depressurization switching unit 600 when the detected power source size is greater than a predetermined power source range;
d) transferring the power through each of the switching units to the battery unit 900 through the output unit 300; And
e) searching and charging the battery 912 having a small charge amount automatically by the battery controller 930 according to the magnitude of the battery residual amount detected and stored in real time through the battery detector 920 included in the battery unit 900; And a second power source for supplying power to the first power source.
delete

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