KR20190022097A - Energy harvesting apparatus - Google Patents

Abstract

The present invention relates to an energy collecting device capable of collecting maximum power from a plurality of energy sources, comprising: a maximum power point tracking part for extracting a maximum power point voltage of a corresponding energy source on the basis of an output voltage outputted from each energy source; a selection part for comparing the output voltage of the energy source with the extracted maximum power point voltage to select an energy source having the greatest error; a maximum power collecting part for collecting the maximum power by adjusting the output voltage of the energy source selected from the selection part to the maximum power point voltage and outputting the collected maximum power; and a control part for detecting a selection mode from the selection part and controlling the maximum power collecting part in accordance with the detected selection mode.

Description

[0001] ENERGY HARVESTING APPARATUS [0002]

The present invention relates to an energy collecting apparatus, and more particularly, to an energy collecting apparatus capable of collecting maximum power from a plurality of energy sources.

In general, as energy problems become serious due to depletion of fossil fuels, the development of energy collecting devices for collecting and generating energy from renewable energy sources such as solar light is accelerating.

Such an energy collecting apparatus can obtain the maximum power when the output characteristic curve of the energy source reaches the maximum power point.

However, since the maximum power point is a value that varies depending on the environment of the energy source, maximum power point can be obtained by finding the maximum power point which varies according to the environment change.

Therefore, the energy collecting apparatus requires a Max Power Point Tracking (MPPT) capable of tracking the maximum power point.

In addition, although the energy collecting device can obtain maximum power from one energy source through the maximum power point tracking device, it can not be applied to other energy sources, and inefficiency in designing an energy collecting device corresponding to another energy source there was.

Therefore, it is required to develop an energy collecting apparatus which is commonly applied to a plurality of different energy sources in the future and is capable of efficiently collecting the maximum power from a plurality of energy sources.

The present invention is directed to solving the above-mentioned problems and other problems. It is yet another object of the present invention to provide a power supply control apparatus and a power supply control method thereof, which are capable of selecting an energy source having the largest error by comparing an output voltage of each energy source with an extracted maximum power point voltage, An energy collecting device capable of efficiently collecting maximum power from a plurality of energy sources by disposing a control section for controlling the power collecting section.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

An energy collecting apparatus for collecting maximum power from a plurality of energy sources according to an embodiment of the present invention includes a maximum power point tracing unit for extracting a maximum power point voltage of a corresponding energy source based on an output voltage output from each energy source, A selection unit for selecting an energy source having the largest error by comparing the output voltage of the energy source with the extracted maximum power point voltage, and a controller for adjusting the output voltage of the energy source selected by the selection unit to a maximum power point voltage And a control unit for detecting the selection mode from the selection unit and controlling the maximum power collection unit according to the detected selection mode.

Here, the selector includes an error amplifier receiving an output voltage of each energy source and a maximum power point voltage, amplifying an error between the output voltage of each energy source and the maximum power point voltage and outputting the amplified error signal, A first comparator for comparing the signals output from the error amplifiers, and a second comparator for receiving signals output from the error amplifiers corresponding to the respective energy sources, and selecting an energy source having the largest error according to an output signal of the first comparator And a second comparator for comparing an error of the energy source selected from the first selector with a minimum reference value.

The selector includes a third comparator for comparing the signals output from the first selectors, and a second comparator for receiving signals output from the first selectors and selecting an energy source having the largest error according to an output signal of the third comparator And may further include a second selector.

The maximum power collecting unit includes a first buffer unit for storing an output voltage of the selected energy source, a first switching unit for switching according to a control signal such that the voltage stored in the first buffer unit is output, A second switching unit for switching a voltage stored in the first buffer to a maximum power point voltage, a second switching unit for switching a voltage controlled by the voltage control unit according to a control signal, And a third switching unit for switching the voltage stored in the first buffer according to the control signal so that the voltage stored in the first buffer is output to the second buffer unit.

Then, when detecting the selection mode from the selection unit, the control unit selects the first selection mode in which the same energy source is consecutively selected, the second selection mode in which different energy sources are consecutively selected, A selection mode, and a fourth selection mode in which the battery is selected only once.

When controlling the maximum power collecting unit, the control unit may generate the PWM signal by adjusting the duty ratio according to the detected selection mode, and may control the voltage controlling unit based on the generated PWM signal.

Next, the control unit includes: a storage unit for storing the duty information corresponding to the selection mode in advance; an extraction unit for extracting the duty information corresponding to the detected selection mode from the storage unit; A first comparator for comparing the output signal of the digital-to-analog converter with the output signal of the ramp signal generator, and a comparator for comparing the output signal of the digital-analog converter with the ramp signal of each energy source, And a PWM signal generation unit for generating a PWM signal by adjusting a duty ratio based on the output signals of the first and second comparison units.

In addition, the present invention is characterized by generating a cold start voltage based on an output voltage output from each energy source, detecting whether the generated cold start voltage reaches a reference voltage, and, when the cold start voltage reaches a reference voltage, And a cold start unit for outputting to the control unit and turning on the control unit.

Here, the cold start portion can be turned off at the same time as turning on the control portion.

Next, the cold start section includes an energy source voltage synthesizing section for synthesizing an output voltage outputted from each energy source, a clock signal generating section for generating a clock signal based on the synthesized voltage, A cold start voltage generating unit for generating a cold start voltage, a detecting unit for detecting whether the generated cold start voltage reaches a reference voltage, and a cold start voltage detecting unit for detecting a cold start voltage from the detecting unit and outputting a cold start voltage to the control unit, The first switching unit switches the first switching unit to the first switching unit.

The cold start unit may include a second switching unit that outputs a voltage of the battery to the control unit to switch the control unit on when the cold start voltage reaches the reference voltage when the output terminal is connected to the battery.

Effects of the energy collecting apparatus according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, there is provided a power supply control method for a power supply apparatus, comprising: a selection unit for selecting an energy source having the largest error by comparing an output voltage of each energy source with an extracted maximum power point voltage; By disposing a control unit for controlling the maximum power collecting unit in accordance with the detected selection mode, it is possible to efficiently collect the maximum power from a plurality of energy sources.

According to at least one of the embodiments of the present invention, the cold start section can be arranged to stably drive the control section.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

FIG. 1 is a block diagram for explaining an energy collecting apparatus according to the present invention.
FIG. 2 is a block diagram showing a layout relationship between a plurality of energy sources and a maximum power point tracking unit according to the first embodiment of the present invention.
3 is a block diagram showing a layout relationship between a plurality of energy sources and a maximum power point tracking unit according to the second embodiment of the present invention.
4 is a circuit diagram showing the selector of FIG.
5 is a clock timing diagram of the selector.
6 is a circuit diagram showing the maximum power collection unit of FIG.
7 is a circuit diagram showing the control unit of FIG.
FIG. 8 is a timing chart showing PMW signal generation.
9 is a circuit diagram showing a maximum power collecting section including a cold start section.
10 is a circuit diagram showing the cold start portion of FIG.
11 is a circuit diagram showing the energy source voltage synthesizing unit of FIG.
12 is a circuit diagram showing the detection unit of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a block diagram for explaining an energy collecting apparatus according to the present invention.

As shown in FIG. 1, the energy collecting apparatus according to the present invention can collect maximum power from a plurality of energy sources 100.

Here, the plurality of energy sources 100 may be different energy sources.

For example, the plurality of energy sources 100 may include a first energy source 110 such as a solar energy source, a second energy source 120 such as a radio frequency (RF) signal energy source, 3 energy source 130, and a fourth energy source 140 such as a battery.

The energy collection device may include a maximum power point tracking unit 200, a selection unit 300, a maximum power collection unit 400, and a control unit 500.

The maximum power point collecting unit 200 can extract the maximum power point voltage of the corresponding energy source based on the output voltage output from each energy source.

Here, the maximum power point tracking unit 200 may be plural, and may be arranged in a one-to-one correspondence with respect to each energy source 100.

For example, the number of the maximum power point tracking units 200 may be the same as the number of the energy sources 100.

For example, if the maximum power point tracer 200 includes a first maximum power point tracker, a second maximum power point tracker, a third maximum power point tracker, and a fourth maximum power point tracker, Extracts the maximum power point of the first energy source corresponding to the first energy source, the second maximum power point tracker extracts the maximum power point of the second energy source corresponding to the second energy source, The point tracker may extract the maximum power point of the third energy source corresponding to the third energy source and the fourth maximum power point tracker may extract the maximum power point of the fourth energy source corresponding to the fourth energy source.

In this case, the maximum power point tracking unit 200 can simultaneously extract the maximum power point voltage for a plurality of energy sources, and the maximum power point can be collected at a high speed.

As another example, the maximum power point tracking unit 200 may be arranged corresponding to a plurality of energy sources.

Here, the number of the maximum power point tracking units 200 may be smaller than the number of the plurality of energy sources 100.

For example, if the maximum power point tracking unit 200 includes one maximum power point tracker, the maximum power point tracker is electrically connected corresponding to the first, third, fourth, and fourth energy sources, , And the maximum power points of the second, third, and fourth energy sources can be extracted.

In this case, the maximum power point tracking unit 200 can extract the maximum power point voltage sequentially for a plurality of energy sources. Since only one maximum power point tracker is used, circuit design is simple and manufacturing cost is reduced There is an effect that can be.

Next, the selecting unit 300 can compare the output voltage of the energy source 100 with the extracted maximum power point voltage to select the energy source having the largest error.

At this time, the reason why the selecting unit 300 selects an energy source having a large error is to maximize the maximum power collection time and efficiency by preferentially collecting the maximum power among the energy sources having the largest errors among the plurality of energy sources It is because.

Here, the selector 300 may include an error amplifier, a first comparator, a first selector, and a second comparator.

The error amplifier receives the output voltage of each energy source and the maximum power point voltage and can amplify and output the error between the output voltage of each energy source and the maximum power point voltage.

The first comparator can then compare the signals output from the error amplifiers corresponding to each energy source.

Next, the first selector receives the signals output from the error amplifiers corresponding to each energy source, and can select the energy source having the largest error according to the output signal of the first comparator.

Then, the second comparator can compare the error of the energy source selected from the first selector with the minimum reference value.

Optionally, the selector 300 may further include a third comparator and a second selector.

Here, the third comparator compares the signals output from the first selectors, the second selector receives the signals output from the first selectors, and receives the energy having the largest error according to the output signal of the third comparator You can choose the circle.

For example, when the controller 500 recognizes that the error of the energy source is smaller than the minimum reference value based on the signal output from the second comparator of the selection unit 300, the controller 500 can select the battery instead of selecting the energy source.

Next, the maximum power collecting unit 400 may collect the maximum power by regulating the output voltage of the selected energy source from the selecting unit 300 to the maximum power point voltage, and output the collected maximum power.

For example, the maximum power collecting unit 400 may be a dc-dc converter driven according to a control signal of the controller 500.

The maximum power collecting unit 400 includes a first buffer unit for storing an output voltage of the selected energy source, a first switching unit for switching the voltage stored in the first buffer unit according to a control signal, A second switching unit for switching a voltage stored in the first buffer to a maximum power point voltage, a second switching unit for switching a voltage controlled by the voltage control unit according to a control signal, a voltage controlled by the switching of the second switching unit, And a third switching unit for switching the voltage stored in the first buffer according to the control signal so that the voltage stored in the first buffer is output to the second buffer unit.

Here, the third switching unit may store the voltage stored in the first buffer in the second buffer and switch the output to the battery.

The control unit 500 can detect the selection mode from the selection unit 300 and control the maximum power collection unit 400 according to the selected selection mode.

Here, when detecting the selection mode from the selection unit 300, the control unit 500 may include a first selection mode in which the same energy source is continuously selected, a second selection mode in which different energy sources are consecutively selected, A third selection mode continuously selected, and a fourth selection mode in which the battery is selected only once. However, the present invention is not limited thereto.

When the control unit 500 controls the maximum power collecting unit 400, the control unit 500 generates a PWM signal by adjusting a duty ratio according to the detected selection mode, and generates a PWM signal based on the generated PWM signal, Can be controlled.

For example, the control unit 500 may increase the duty ratio of the PWM signal when the detected selection mode is a mode in which the same energy source is continuously selected or a mode in which the battery is continuously selected.

In addition, the control unit 500 can reduce the duty ratio of the PWM signal when the detected selection mode is a mode in which different energy sources are continuously selected or a mode in which the battery is selected only once.

In some cases, when the duty ratio is adjusted according to the detected selection mode, the controller 500 may adjust the duty ratio based on the preset value stored in advance and corresponding to the duty ratio corresponding to the selection mode.

As described above, according to the present invention, the control unit 500 controls the maximum power collecting unit 400 by adjusting the duty ratio according to the selection mode, thereby maximizing the maximum power collecting time and efficiency.

For example, the control unit 500 may include a storage unit for storing duty information corresponding to the selection mode in advance, an extraction unit for extracting the duty information corresponding to the detected selection mode from the storage unit, the extracted duty information as an analog signal A first comparator for comparing an output signal of the digital-analog converter with an output signal of the ramp signal generator, a second comparator comparing the output signal of the digital-analog converter with the ramp signal of each energy source, And a PWM signal generator for generating a PWM signal by adjusting the duty ratio based on the output signals of the first and second comparators.

In some cases, the present invention may further include a cold start portion.

Here, the cold start unit generates a cold start voltage based on the output voltage output from each energy source, detects whether the generated cold start voltage reaches the reference voltage, and outputs a cold start voltage when the cold start voltage reaches the reference voltage The control unit can be turned on by outputting it to the control unit.

The cold start unit can be turned off at the same time that the control unit 500 is turned on.

Accordingly, the present invention can stably drive the control unit 500 by arranging the cold start unit.

For example, when the output terminal is connected to the battery, the cold start unit may output the voltage of the battery to the control unit 500 to turn on the control unit 500 when the cold start voltage reaches the reference voltage.

For example, the cold start section includes an energy source voltage synthesizing section for synthesizing an output voltage output from each energy source, a clock signal generating section for generating a clock signal based on the synthesized voltage, a step- A cold start voltage generating unit for generating a cold start voltage, a detection unit for detecting whether the generated cold start voltage reaches a reference voltage, a cold start voltage output unit for outputting a cold start voltage to the control unit 500 when the cold start voltage reaches a reference voltage, The first switching unit may switch the first switching unit to ON.

Here, the first switching unit may switch the control unit 500 on and at the same time switch the cold start unit off.

The cold start unit may include a second switching unit that, when the output terminal is connected to the battery, outputs the voltage of the battery to the control unit 500 when the cold start voltage reaches the reference voltage to switch the control unit 500 on .

The clock signal generator of the cold start unit may be a ring oscillator, but is not limited thereto.

FIG. 2 is a block diagram showing a layout relationship between a plurality of energy sources and a maximum power point tracking unit according to the first embodiment of the present invention. FIG. 3 is a block diagram showing a relationship between a plurality of energy sources and a maximum power And a point tracking unit.

2, the maximum power point collecting unit 200 can extract the maximum power point voltage of the corresponding energy source based on the output voltage output from each energy source. The maximum power point tracking unit 200 May be arranged in a one-to-one correspondence with respect to each energy source 100. [

Here, the number of the maximum power point tracking units 200 may be equal to the number of the energy sources 100.

For example, the maximum power point tracking unit 200 may be configured as a first maximum power point tracker 201, a second maximum power point tracker 202, a third maximum power point tracker 203, 204, the first maximum power point tracker 201 extracts the maximum power point of the first energy source 110 corresponding to the first energy source 110 and the maximum power point 210 of the second maximum power point tracker 202, The third maximum power point tracker 203 extracts the maximum power point of the second energy source 120 corresponding to the second energy source 120 and the third maximum power point tracker 203 extracts the third energy source 120 corresponding to the third energy source 130, And the fourth maximum power point tracker 204 may extract the maximum power point of the fourth energy source 140 corresponding to the fourth energy source 140. [

In this case, the maximum power point tracking unit 200 can simultaneously extract the maximum power point voltage for a plurality of energy sources, and the maximum power point can be collected at a high speed.

Also, as shown in FIG. 3, the maximum power point tracking unit 200 may be arranged corresponding to a plurality of energy sources.

Here, the number of the maximum power point tracking units 200 may be smaller than the number of the plurality of energy sources 100.

For example, if the maximum power point tracer 200 includes one maximum power point tracer, the maximum power point tracer may be coupled to the first, third, fourth, and fourth energy sources 110, 120, 130, And the maximum power points of the first, second, third, and fourth energy sources 110, 120, 130, and 140 can be extracted.

In this case, the maximum power point tracking unit 200 can extract the maximum power point voltage sequentially for a plurality of energy sources. Since only one maximum power point tracker is used, circuit design is simple and manufacturing cost is reduced There is an effect that can be.

FIG. 4 is a circuit diagram showing the selector of FIG. 1, and FIG. 5 is a clock timing diagram of the selector.

4 and 5, the selecting unit 300 of the energy collecting apparatus according to the present invention compares the output voltage Vbuffer of the energy source 100 with the extracted maximum power point voltage Vmpp You can choose the energy source with the largest error.

At this time, the reason why the selecting unit 300 selects an energy source having a large error is to maximize the maximum power collection time and efficiency by preferentially collecting the maximum power among the energy sources having the largest errors among the plurality of energy sources It is because.

Here, the selector 300 may include an error amplifier 310, a first comparator 320, a first selector 330, and a second comparator 340.

For example, the error amplifier 310 receives the output voltage Vbuffer of each energy source and the maximum power point voltage Vmpp, and amplifies the error between the output voltage of each energy source and the maximum power point voltage Can be output.

The first comparator 320 may compare the signals output from the error amplifiers 310 corresponding to the respective energy sources.

Next, the first selector 330 receives the signals output from the error amplifiers 310 corresponding to the respective energy sources, selects an energy source having the largest error according to the output signal of the first comparator 320 .

If there is no third comparator 350 and no second selector 360 and only the first selector 330 is present, the second comparator 340 compares the error of the selected energy source from the first selector 330 with the minimum reference value Can be compared.

Optionally, the selector 300 may further include a third comparator 350 and a second selector 360.

Here, the third comparator 350 compares the signals output from the first selectors 330, the second selector 360 receives the signals output from the first selectors 330, The energy source having the largest error can be selected according to the output signal of the comparator 350. [

At this time, when the third comparator 350 and the second selector 360 exist, the second comparator 340 may compare the error of the selected energy source from the second selector 360 with the minimum reference value.

For example, when the controller 500 recognizes that the error of the energy source is smaller than the minimum reference value based on the signal output from the second comparator 340 of the selection unit 300, the controller 500 can select the battery instead of selecting the energy source .

6 is a circuit diagram showing the maximum power collection unit of FIG.

6, the maximum power collecting unit 400 collects the maximum power by regulating the output voltage of the selected energy source from the selecting unit 300 to the maximum power point voltage, and outputs the collected maximum power have.

For example, the maximum power collecting unit 400 may be a dc-dc converter driven according to a control signal of the controller 500.

The maximum power collecting unit 400 includes a first buffer unit 410, a first switching unit 420, a voltage regulating unit 430, a second switching unit 440, a second buffer unit 450, 3 switching unit 460. [

Here, the first buffer unit 410 may store the output voltage of the selected energy source.

The first switching unit 420 may switch according to a control signal so that the voltage stored in the first buffer unit 410 is output.

The voltage regulator 430 may adjust the voltage stored in the first buffer unit 410 to the maximum power point voltage according to the switching of the first switching unit 420.

Next, the second switching unit 440 may switch according to the control signal so that the voltage regulated by the voltage regulator 430 is output.

The second buffer unit 450 may store the adjusted voltage according to the switching of the second switching unit 460 and output the collected maximum power.

The third switching unit 460 may switch the voltage stored in the first buffer unit 410 according to a control signal so that the voltage stored in the first buffer unit 410 is output to the second buffer unit 450.

Here, the third switching unit 460 may store the voltage stored in the first buffer unit 410 in the second buffer unit 450 and switch the output to the battery.

FIG. 7 is a circuit diagram showing the control unit of FIG. 1, and FIG. 8 is a timing chart showing PMW signal generation.

As shown in Figs. 7 and 8, the control unit 500 can detect the selection mode from the selection unit and control the maximum power collection unit according to the detected selection mode.

Here, the control unit 500 includes a first selection mode in which the same energy source is continuously selected, a second selection mode in which different energy sources are consecutively selected, and a second selection mode in which the batteries are continuously selected A third selection mode in which the battery is selected only once, and a fourth selection mode in which the battery is selected only once. However, the present invention is not limited to this.

Next, when controlling the maximum power collecting unit, the controller 500 may control the voltage regulator based on the generated PWM signal by adjusting the duty ratio according to the detected selection mode to generate the PWM signal .

For example, the control unit 500 may increase the duty ratio of the PWM signal when the detected selection mode is a mode in which the same energy source is continuously selected or a mode in which the battery is continuously selected.

In addition, the control unit 500 can reduce the duty ratio of the PWM signal when the detected selection mode is a mode in which different energy sources are continuously selected or a mode in which the battery is selected only once.

In some cases, when the duty ratio is adjusted according to the detected selection mode, the controller 500 may adjust the duty ratio based on the preset value stored in advance and corresponding to the duty ratio corresponding to the selection mode.

As described above, according to the present invention, the control unit 500 controls the maximum power collecting unit 400 by adjusting the duty ratio according to the selection mode, thereby maximizing the maximum power collecting time and efficiency.

7 and 8, the control unit 500 includes a storage unit 510, an extraction unit 520, a digital-analog conversion unit 530, a ramp signal generation unit 540, a first comparison unit 550, A second comparator 560, and a PWM signal generator 570.

Here, the storage unit 510 may store the duty information corresponding to the selection mode in advance.

The extraction unit 520 may extract the duty information corresponding to the detected selection mode from the storage unit 510. [

Next, the digital-analog converter 530 converts the extracted duty information into an analog signal. The digital-analog converter and the ramp signal generator 540 generate a ramp signal of each energy source .

The first comparator 550 compares the output signal of the digital-analog converter 530 with the output signal of the ramp signal generator 540 and the second comparator 560 compares the output signal of each energy source The lamp signal and the reference signal can be compared.

The PWM signal generating unit 570 can generate the PWM signal by adjusting the duty ratio based on the output signals of the first and second comparing units 550 and 560.

9 is a circuit diagram showing a maximum power collecting unit including a cold start unit, FIG. 10 is a circuit diagram showing a cold start unit of FIG. 9, FIG. 11 is a circuit diagram showing an energy source voltage synthesizing unit of FIG. 10, Fig.

9 to 12, the maximum power collecting unit of the present invention may further include a cold start unit 600.

Here, the cold start unit 600 generates a cold start voltage based on the output voltage output from each energy source, detects whether the generated cold start voltage reaches the reference voltage, and when the cold start voltage reaches the reference voltage The cold start voltage may be outputted to the control unit to turn on the control unit.

Then, the cold start unit 600 can be turned off at the same time that the control unit is turned on.

Therefore, according to the present invention, by placing the cold start part 600, the control part can be stably driven.

For example, when an output terminal is connected to a battery, the cold start unit 600 may output the voltage of the battery to the control unit to turn on the control unit when the cold start voltage reaches the reference voltage.

10, for example, the cold start unit 600 includes an energy source voltage synthesizer 630, a clock signal generator 640, a cold start voltage generator 650, a detector 660, A first switching unit 670, and a first switching unit 620.

Here, the energy source combiner 630 combines output voltages output from the respective energy sources, and the clock signal generator 640 can generate a clock signal based on the synthesized voltage.

Next, the cold start voltage generating unit 650 can generate a cold start voltage by stepping up the generated clock signal, and the detecting unit 660 detects whether the generated cold start voltage reaches the reference voltage, The control unit 670 may control the first switching unit 620 to output the cold start voltage to the control unit when the cold start voltage reaches the reference voltage from the detection unit 660 so that the control unit is turned on.

Next, the first switching unit 620 may output the cold start voltage to the control unit according to the control signal of the switching control unit 670, and may switch the control unit to be on.

Here, the first switching unit 620 may switch the control unit on and the cold start unit 600 off.

The cold start unit 600 includes a second switching unit 610 for outputting the voltage of the battery to the control unit and switching the control unit on when the cold start voltage reaches the reference voltage when the output terminal is connected to the battery .

Here, the switching control unit 670 of the cold start unit 600 may control the second switching unit 610 to output the voltage of the battery to the control unit and turn on the control unit when the cold start voltage reaches the reference voltage.

The clock signal generator 640 of the cold start unit 600 may be a ring oscillator, but is not limited thereto.

As described above, according to the present invention, there is provided a power supply control apparatus comprising: a selector for comparing an output voltage of each energy source with an extracted maximum power point voltage to select an energy source having the largest error; By arranging a control unit for controlling the maximum power collecting unit in accordance with this, it is possible to efficiently collect the maximum power from a plurality of energy sources.

Further, the present invention can stably drive the control unit by arranging the cold start unit.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

The present invention described above can be embodied as computer-readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer-readable medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and also implemented in the form of a carrier wave (for example, transmission over the Internet) . Also, the computer may include a control unit of the terminal.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: energy source
200: maximum power point tracking unit
300:
400: maximum power collecting unit
500:

Claims (15)

1. An energy collection device for collecting maximum power from a plurality of energy sources,
A maximum power point tracking unit for extracting a maximum power point voltage of the corresponding energy source based on an output voltage output from each energy source;
A selector for comparing an output voltage of the energy source with the extracted maximum power point voltage to select an energy source having the largest error;
A maximum power collecting part for collecting maximum power by adjusting the output voltage of the energy source selected from the selecting part to the maximum power point voltage and outputting the collected maximum power; And,
And a control unit for detecting the selection mode from the selection unit and controlling the maximum power collection unit in accordance with the detected selection mode. The apparatus according to claim 1,
An error amplifier receiving an output voltage of each energy source and a maximum power point voltage and amplifying and outputting an error between an output voltage of each energy source and a maximum power point voltage;
A first comparator for comparing signals output from error amplifiers corresponding to the respective energy sources;
A first selector that receives signals output from error amplifiers corresponding to the energy sources and selects an energy source having the largest error according to an output signal of the first comparator; And,
And a second comparator for comparing an error of the energy source selected from the first selector with a minimum reference value. 3. The apparatus according to claim 2,
A third comparator comparing signals output from the first selectors; And,
Further comprising a second selector that receives signals output from the first selectors and selects an energy source having the largest error according to an output signal of the third comparator. The apparatus of claim 3,
And selects a battery instead of selecting the energy source when it is recognized that the error of the energy source is smaller than the minimum reference value based on a signal output from the second comparator. The apparatus according to claim 1, wherein the maximum power-
A first buffer unit for storing an output voltage of the selected energy source;
A first switching unit for switching a voltage stored in the first buffer unit according to a control signal;
A voltage regulator for regulating a voltage stored in the first buffer to a maximum power point voltage according to the switching of the first switching unit;
A second switching unit for switching according to the control signal so that a voltage regulated by the voltage regulator is outputted;
A second buffer unit for storing the adjusted voltage according to the switching of the second switching unit and outputting the collected maximum power; And,
And a third switching unit for switching according to the control signal so that the voltage stored in the first buffer is output to the second buffer unit. 6. The apparatus of claim 5, wherein the third switching unit comprises:
And stores the voltage stored in the first buffer in the second buffer so as to output the voltage to the battery. The apparatus of claim 1,
And controls the voltage regulator based on the generated PWM signal when the maximum power collector is controlled by adjusting a duty ratio according to the detected selection mode to generate a PWM signal, Device. 8. The apparatus of claim 7,
Wherein the duty ratio of the PWM signal is increased when the detected selection mode is a mode in which the same energy source is continuously selected or a mode in which the battery is continuously selected. 8. The apparatus of claim 7,
Wherein the duty ratio of the PWM signal is reduced when the detected selection mode is a mode in which different energy sources are continuously selected or a mode in which the battery is selected only once. 8. The apparatus of claim 7,
Wherein the controller adjusts the duty ratio based on a preset value stored in advance when the duty ratio corresponding to the selected mode is adjusted according to the detected selection mode. The apparatus of claim 1,
A storage unit in which duty information corresponding to the selection mode is preset and stored;
An extraction unit for extracting duty information corresponding to the detected selection mode from the storage unit;
A digital-analog converter for converting the extracted duty information into an analog signal;
A lamp signal generator for generating a ramp signal of each energy source;
A first comparator for comparing an output signal of the digital-analog converter and an output signal of the ramp signal generator;
A second comparator for comparing the ramp signal of each energy source with a reference signal; And,
And a PWM signal generation unit for generating a PWM signal by adjusting a duty ratio based on the output signals of the first and second comparison units. The method according to claim 1,
A cold start voltage generating unit that generates a cold start voltage based on an output voltage from each of the energy sources, detects whether the generated cold start voltage reaches a reference voltage, and when the cold start voltage reaches a reference voltage, Further comprising a cold start unit for outputting the control signal to the control unit to turn on the control unit. 13. The apparatus according to claim 12, wherein the cold start section comprises:
Wherein the control unit is turned on and off at the same time. 13. The apparatus according to claim 12, wherein the cold start section comprises:
An energy source voltage synthesizer for synthesizing an output voltage output from each of the energy sources;
A clock signal generator for generating a clock signal based on the synthesized voltage;
A cold start voltage generator for generating a cold start voltage by stepping up the generated clock signal;
A detecting unit detecting whether the generated cold start voltage reaches a reference voltage;
And a first switching unit for outputting the cold start voltage to the control unit when the cold start voltage reaches the reference voltage from the detection unit so as to switch the control unit on. 15. The apparatus of claim 14, wherein the cold start section comprises:
And a second switching unit for outputting the voltage of the battery to the control unit when the cold start voltage reaches the reference voltage when the output terminal is connected to the battery, thereby switching the control unit on.

Images