KR20200069152A - Apparatus for controlling voltage - Google Patents

Abstract

A voltage control device according to an embodiment of the present invention comprises: a power source unit which supplies a direct voltage; a first control unit which receives the direct voltage and controls an inrush current generated upon reception of the direct voltage as a plurality of switching elements repeat on-off operation; a second control unit which turns off the switching elements of the first control unit if the size of the inrush current exceeds a predetermined value; and a delayed output unit which receives a direct voltage having the inrush current controlled and outputs an output voltage to a load terminal, wherein the delayed output unit increases the size of the output voltage for a fixed time until the size of the output voltage reaches the size of the direct voltage having the inrush current controlled.

Description

Voltage control device {APPARATUS FOR CONTROLLING VOLTAGE}

The embodiment relates to a voltage control device for charging an electric vehicle.

An electric vehicle is a vehicle that obtains the driving energy of the vehicle from electric energy, not from fossil fuel combustion. Such electric vehicles are of increasing interest due to the fact that they have no exhaust gas and very little noise, so that they are pollution-free and environmentally friendly.

Such an electric vehicle drives a motor through a battery embedded in the vehicle. At this time, the battery supplies not only the motor but also the electric power required by the communication controller of the electric vehicle (EVCC). Specifically, the electric vehicle supplies power to the EVCC through a power supply using a battery as an input.

When charging the battery, in order to control the battery charging, the electric vehicle mainly uses a contactor. In detail, the contactor controls battery charging by connecting a switch using a magnetic field formed when an electric current is applied through an operation technique of a solenoid coil.

However, all contactors generate an inrush current during initial operation. As a result, parts of the electric vehicle are damaged or the output voltage is lowered due to a high current inrush current, which causes a problem in supplying a stable output voltage.

In order to control inrush current and supply a stable output voltage, a dedicated IC device or MCU device for controlling a contactor is sometimes used, but the circuit configuration for using this is complicated and the cost of product production increases. have.

The embodiment is to provide a voltage control device capable of controlling the inrush current generated during the initial operation of the contactor.

An embodiment is to provide a voltage control device that supplies a stable output voltage by preventing a phenomenon in which an output voltage is lowered by an inrush current generated during an initial operation of a contactor.

The problem to be solved in the embodiment is not limited to this, and it will be said that the object or effect that can be grasped from the solution means or embodiment of the problem described below is also included.

The voltage control device according to an embodiment of the present invention is a power supply unit for supplying a DC voltage, the DC voltage is applied, and a plurality of switching elements repeats an on-off operation to control an inrush current generated when the DC voltage is applied. When the magnitude of the inrush current exceeds a preset value, the control unit, a second control unit that turns off the switching element of the first control unit, receives the DC voltage controlled by the inrush current, and outputs an output voltage to the load stage. And a delay output unit for increasing the magnitude of the output voltage for a predetermined time until the inrush current reaches the controlled magnitude of the DC voltage.

The first control unit may further include a driving unit supplying a driving voltage for initially driving.

The first control unit may turn on the plurality of switching elements when the driving voltage is input, and turn off the plurality of switching elements when the ground power is input from the second control unit to control the inrush current.

The second control unit may turn off a plurality of switching elements of the first control unit by applying a ground power to the first control unit when the magnitude of the inrush current exceeds a preset value.

When the predetermined amount of charge is charged according to a preset time constant, the delay output unit turns on a switching element to increase the output voltage level according to the time constant until the inrush current reaches a controlled DC voltage level. Can be.

The apparatus may further include a noise removing unit that removes a noise signal generated during at least one of the first control unit and the delay output unit.

The first control unit includes a first switching element, the first terminal of which is connected to the positive terminal of the power supply unit, a first resistance element of which the first terminal is connected to the second terminal of the first switching element, and the first terminal of the first control unit. A second resistor element connected to the third terminal of the first switching element, a third resistor element connected to the second terminal of the second resistor element and a second terminal connected to the ground terminal, and a first terminal connected to the third terminal of the first switching element The second switching is connected to the first end of the second resistance element, the second end is connected to the second end of the first resistance element, and the third end is connected to the second end of the second resistance element. It may include a device.

The second control unit may include: a fourth resistor element having a first terminal connected to the first controller, a fifth terminal having a first terminal connected to a second terminal of the fourth resistor element, and a second terminal connected to a ground terminal; A resistor element may include a regulator element having a first terminal connected to the ground terminal, a second terminal connected to the first controller, and a third terminal connected to the second terminal of the fourth resistance element. .

The delay output unit includes a sixth resistance element, the first terminal of which is connected to the first control unit, a seventh resistance element of which the first terminal is connected to the second terminal of the sixth resistor element, and the second terminal is connected to the ground terminal. , A first capacitor having a first terminal connected to the second terminal of the sixth resistor element, an eighth resistor element connected to the second terminal of the eighth resistor element, and a second terminal connected to the ground terminal. , A ninth resistance element with a first terminal connected to the first terminal of the sixth resistance element, a tenth resistance element with a first terminal connected to the second terminal of the ninth resistance element, and a first terminal with the tenth resistance element The third switching element is connected to the second terminal of the third terminal is connected to the second terminal of the eighth resistance element, the first terminal is connected to the second terminal of the third switching element, the second terminal is a ground terminal An 11th resistance element connected to and a first end is connected to the first end of the ninth resistance element, a second end is connected to the first end of the eleventh resistance element, and a third end is connected to the ninth And a fourth switching element connected to the second end of the resistance element.

The driving unit includes a twelfth resistance element having a first terminal connected to the power supply unit, a thirteenth resistance element having a first terminal connected to a second terminal of the twelfth resistance element, and a second terminal connected to a ground terminal. One end is connected to the first end of the twelfth resistance element and the first control unit is a fourteenth resistance element, and the first end is connected to the first control unit, and the second end is the second of the fourteenth resistance element. It may include a fifth switching element connected to the terminal, the third terminal is connected to the second terminal of the twelfth resistance element.

The twelfth resistance element may include at least one diode element.

The noise removing unit may include at least one of a second capacitor disposed between the first control unit and the delay output unit and a third capacitor disposed in the delay output unit.

According to an embodiment, the inrush current generated during the initial operation of the contactor may be controlled to prevent circuit breakage due to the inrush current, and the life and reliability of the component may be improved.

In an embodiment, a stable output voltage may be supplied by preventing a phenomenon in which an output voltage is lowered by an inrush current generated during an initial operation of the contactor.

In the embodiment, a dedicated IC (intergrated circuit) or microcontroller unit (MCU) for controlling a contactor is not required, thereby reducing product manufacturing cost.

In the embodiment, it is possible to design a circuit in a functional block unit, so it is easy to design a circuit change according to the type or specification of a contactor.

Various and beneficial advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a configuration diagram of a voltage control device according to an embodiment of the present invention.
2 is a circuit diagram of the voltage control device according to the first embodiment.
3 is a circuit diagram of a voltage control device according to a second embodiment.
4 is a circuit diagram of a voltage control device according to a third embodiment.
5 is a view showing the output voltage simulation result of the voltage control device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the technical spirit of the present invention is not limited to some embodiments described, but may be implemented in various different forms, and within the scope of the technical spirit of the present invention, one or more of its components between embodiments may be selectively selected. It can be used by bonding and substitution.

In addition, the terms used in the embodiments of the present invention (including technical and scientific terms), unless specifically defined and described, can be generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and commonly used terms, such as predefined terms, may interpret the meaning in consideration of the contextual meaning of the related technology.

In addition, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In the present specification, a singular form may also include a plural form unless specifically stated in the phrase, and is combined with A, B, and C when described as "at least one (or more than one) of A and B, C". It can contain one or more of all possible combinations.

In addition, in describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used.

These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component.

And, when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected to, coupled to, or connected to the other component, but also to the component It may also include the case of'connected','coupled' or'connected' due to another component between the other components.

Further, when described as being formed or disposed in the "top (top) or bottom (bottom)" of each component, the top (top) or bottom (bottom) is one as well as when the two components are in direct contact with each other It also includes a case in which another component described above is formed or disposed between two components. In addition, when expressed as "up (up) or down (down)", it may include the meaning of the downward direction as well as the upward direction based on one component.

The voltage control device 100 according to an embodiment of the present invention is a device for stably outputting a voltage by removing an inrush current generated during an initial operation of a DC contactor used to control battery charging of an electric vehicle .

1 is a configuration diagram of a voltage control device according to a first embodiment of the present invention.

Referring to FIG. 1, the voltage control device 100 according to an embodiment of the present invention includes a power supply unit 110, a first control unit 120, a second control unit 130, a delay output unit 140, and a driving unit 150 It may include.

First, the power supply unit 110 supplies a DC voltage.

According to an embodiment, the power supply unit 110 may be a PFC boost converter. For example, when the power supply unit 110 is a PFC boost converter, the power supply unit 110 propagates and rectifies an alternating voltage of 220[V] size supplied from the power system through a bridge diode circuit, and then power factor ( By increasing the power factor), it is possible to supply the boosted DC voltage of 16[V].

The PFC boost converter described above is only an embodiment of the power supply unit 110, and the power supply unit 110 may be implemented in various structures that supply DC voltage.

Next, the first control unit 120 receives a DC voltage, and the plurality of switching elements repeat on-off operations to control an inrush current generated when the DC voltage is applied. The rush current means a maximum instantaneous pressure current that flows temporarily when the electric device is turned on, that is, a transient current. The inrush current may have the same meaning as an input surge current or a switch-on surge.

Specifically, the first control unit 120 turns on a plurality of switching elements when a driving voltage is input, and turns off a plurality of switching elements when ground power is applied from the second control unit 130. To control the inrush current.

For example, when a driving voltage is input from the driving unit 150, the first control unit 120 supplies a switching current to turn on the switching elements to a plurality of switching elements using the driving voltage. In addition, a DC voltage may be supplied to the delay output unit 140 by flowing current according to the DC voltage by a plurality of turned-on switching elements.

On the other hand, when receiving ground power from the second control unit 130, the first control unit 120 is cut off the supply of the driving voltage. Accordingly, the supply of switching current to turn on the plurality of switching elements is cut off. Accordingly, the plurality of switching elements are turned off, and supply of the DC voltage to the delay output unit 140 is stopped.

That is, when the inrush current occurs according to the application of the DC voltage, the first control unit 120 may control the flow of the inrush current by supplying ground power from the second control unit 130 and turning off a plurality of switching elements.

Next, the second control unit 130 is configured to control the operation of the first control unit 120 that controls the inrush current by using the detected magnitude of the inrush current. When the magnitude of the inrush current exceeds a preset value, the second control unit 130 turns off the switching element of the first control unit 120.

Specifically, when the magnitude of the inrush current exceeds a preset value, the second control unit 130 may turn off a plurality of switching elements of the first control unit 120 by applying ground power to the first control unit 120. have.

Next, the delay output unit 140 receives the DC voltage controlled by the inrush current and outputs the output voltage to the load terminal 200. At this time, the delay output unit 140 increases the magnitude of the output voltage for a predetermined time until the inrush current reaches the controlled magnitude of the DC voltage.

Specifically, when a predetermined amount of charge is charged according to a preset time constant, the delay output unit 140 increases the magnitude of the output voltage according to the preset time constant until the inrush current reaches the controlled level of the DC voltage. Can be.

Meanwhile, the DC voltage in which the inrush current is controlled may be dropped by passing through the first control unit 120. Therefore, the DC voltage of which the inrush current is controlled may be smaller than the magnitude of the DC voltage supplied by the power supply unit 110.

Next, the driving unit 150 supplies a driving voltage for initially driving the first control unit 120. In this case, the driving voltage may be generated using the DC voltage supplied from the power supply unit 110.

2 is a circuit diagram of the voltage control device according to the first embodiment.

Referring to FIG. 2, a circuit diagram of each component included in the voltage control device 100 according to an embodiment of the present invention and its operation will be described in detail.

First, the circuit configuration of the driver 150 will be described with reference to FIG. 2. The driving unit 150 includes a twelfth resistance element R12, a thirteenth resistance element R13, a fourteenth resistance element R14, and a fifth switching element SW5.

The first terminal of the twelfth resistance element R12 is connected to the power supply unit 110. Specifically, the first terminal of the twelfth resistance element R12 is connected to a positive (+) terminal of the power supply unit 110. The first end of the twelfth resistance element R12 is connected to the first end of the fourteenth resistance element R14 and the first switching element SW1.

In the thirteenth resistance element R13, the first end is connected to the second end of the twelfth resistance element R12, and the second end is connected to the ground terminal. The ground terminal may mean a terminal connected to a ground power supply.

The first terminal of the fourteenth resistor element R14 is connected to the first terminal and the first controller 120 of the twelfth resistor element R12.

In the fifth switching element SW5, the first end is connected to the first control unit 120, the second end is connected to the second end of the fourteenth resistance element R14, and the third end is the twelfth resistance element ( R12). In this case, the fifth switching element SW5 may be a bipolar junction transistor (BJT) element or a PNP type BJT element. In this case, the first terminal may be a collector terminal, the second terminal may be an emitter terminal, and the third terminal may be a base terminal.

Referring to FIG. 2, the circuit operation of the driver 150 will be described.

The input voltage supplied from the power supply unit 110 is voltage-divided by the twelfth resistance element R12 and the thirteenth resistance element R13, and the divided voltage is applied to the third stage, thereby providing current to the fifth switching element SW5. Is supplied.

When the fifth switching element SW5 is turned on by the current supplied to the third terminal of the fifth switching element SW5, a current between the first and second terminals of the fifth switching element SW5 flows. That is, current flows from the emitter terminal to the collector terminal. The current flowing through the first stage of the fifth switching element SW5 may be the same as the sum of the current flowing through the second stage and the third stage, and the current flowing through the first stage is supplied to the first control unit 120. .

Next, a circuit configuration of the first control unit 120 will be described with reference to FIG. 2. The first control unit 120 includes a first switching element SW1, a first resistance element R1, a second resistance element R2, a third resistance element R3, and a second switching element SW2.

The first switching element SW1 has a first end connected to the power supply 110. Specifically, the first terminal of the first switching element SW1 is connected to the positive terminal of the power supply unit 110. In this case, the first switching element SW1 may be a BJT element or an NPN type BJT element. In this case, the first terminal may be a collector terminal, the second terminal may be an emitter terminal, and the third terminal may be a base terminal.

The first terminal of the first resistor element R1 is connected to the second terminal of the first switching element SW1.

The first terminal of the second resistor element R2 is connected to the third terminal of the first switching element SW1.

In the third resistor element R3, the first terminal is connected to the second terminal of the second resistor element R2, and the second terminal is connected to the ground terminal.

In the second switching element SW2, the first end is connected to the first end of the second resistance element R2, the second end is connected to the second end of the first resistance element R1, and the third end is It is connected to the second end of the second resistor element R2. In this case, the second switching element SW2 may be a BJT element or an NPN type BJT element. In this case, the first terminal may be a collector terminal, the second terminal may be an emitter terminal, and the third terminal may be a base terminal.

Referring to FIG. 2, the circuit operation of the first control unit 120 will be described.

When a driving voltage is applied from the driving unit 150, current is supplied to the third stages of the first switching element SW1 and the second switching element SW2. Then, the first switching element SW1 and the second switching element SW2 are turned on. At this time, the voltage applied to the third terminal of the first switching element SW1 is the same as the voltage of the first terminal of the fifth switching terminal, that is, the driving voltage, and is applied to the third terminal of the second switching element SW2. The voltage is the same as the voltage applied to the third resistance element R3 according to the voltage distribution between the second resistance element R2 and the third resistance element R3.

The voltage formed at the second end of the first switching element SW1 is applied to the second control unit 130. Here, the voltage formed at the second end of the first switching element SW1 has a magnitude equal to the voltage dropped through the first resistance element R1 from the DC voltage applied from the power supply unit 110. For example, when the DC voltage is 16[V], a voltage of 12[V] may be formed in the second stage of the first resistance element R1 due to the voltage drop by the first resistance element R1. .

Next, a circuit configuration of the second control unit 130 will be described with reference to FIG. 2. The second control unit 130 includes a fourth resistance element R4, a fifth resistance element R5, and a regulator element U1.

The first terminal of the fourth resistor element R4 is connected to the first control unit 120. Specifically, the first end of the fourth resistance element R4 is connected to the second end of the first resistance element R1.

In the fifth resistor element R5, the first terminal is connected to the second terminal of the fourth resistor element, and the second terminal is connected to the ground terminal.

In the regulator element U1, the first terminal is connected to the ground terminal, the second terminal is connected to the first control unit 120, and the third terminal is connected to the second terminal of the fourth resistor element R4. Specifically, the second end of the regulator element U1 is connected to the first end of the second resistor element R2. At this time, the regulator device U1 may be a programmable regulator device such as a TL431 device in which an anode terminal and a cathode terminal are conducted when a voltage of a predetermined size or more is applied to a reference terminal. In this case, the first terminal may be an anode terminal, the second terminal may be a cathode terminal, and the third terminal may be a reference terminal.

The circuit operation of the second control unit 130 will be described with reference to FIG. 2.

A voltage according to the voltage distribution between the fourth resistor element R4 and the fifth resistor element R5 is applied to the third stage of the regulator element U1. When the inrush current does not occur, the reference value of the regulator element U1 Do not exceed Therefore, the regulator element U1 remains open, and does not affect the first control unit 120.

However, when an inrush current occurs and the voltage level applied to the third terminal of the regulator element U1 exceeds a reference value, the regulator element U1 is changed to a conduction state. Then, the ground voltage applied to the first terminal of the regulator element U1 is applied to the third terminal of the first switching element SW1 and the third terminal of the second switching element SW2. Due to this, the first switching element SW1 and the second switching element SW2 are turned off, and the first control unit 120 cuts off the voltage supply to the delay output unit 140.

Next, a circuit configuration of the delay output unit 140 will be described with reference to FIG. 2. The delay output unit 140 includes a sixth resistance element R6, a seventh resistance element R7, an eighth resistance element R8, a first capacitor C1, a ninth resistance element R9, and a tenth resistance It includes an element R10, a third switching element SW3, an eleventh resistance element R11, and a fourth switching element SW4.

The first terminal of the sixth resistor element R6 is connected to the first control unit 120. Specifically, the first end of the sixth resistive element R6 is connected to the second end of the first resistive element R1 and the first end of the fourth resistive element R4.

In the seventh resistor element R7, the first terminal is connected to the second terminal of the sixth resistor element R6, and the second terminal is connected to the ground terminal.

In the eighth resistance element R8, the first end is connected to the second end of the sixth resistance element R6.

In the first capacitor C1, the first terminal is connected to the second terminal of the eighth resistor element R8, and the second terminal is connected to the ground terminal.

In the ninth resistor element R9, the first terminal is connected to the first terminal of the sixth resistor element R6.

In the tenth resistance element R10, the first end is connected to the second end of the ninth resistance element R9.

In the third switching element SW3, the first terminal is connected to the second terminal of the tenth resistance element R10, and the third terminal is connected to the second terminal of the eighth resistance element R8. In this case, the third switching element SW3 may be a BJT element or an NPN type BJT element. In this case, the first terminal may be a collector terminal, the second terminal may be an emitter terminal, and the third terminal may be a base terminal.

In the eleventh resistance element R11, the first terminal is connected to the second terminal of the third switching element SW3, and the second terminal is connected to the ground terminal.

In the fourth switching element SW4, the first terminal is connected to the first terminal of the ninth resistor element R9, and the second terminal is connected to the first terminal and the load terminal 200 of the eleventh resistor element R11. And the third end is connected to the second end of the ninth resistor element R9. In this case, the fourth switching element SW4 may be a Field Effect Transistor (FET) element, or a P channel enhancement-type Metal-Oxide-Semiconductor Field Effect Transistor (MOS) element. In this case, the first terminal may be a source terminal, the second terminal may be a drain terminal, and the third terminal may be a gate terminal.

The circuit operation of the delay output unit 140 will be described with reference to FIG. 2.

When a DC voltage is applied from the first control unit 120, charge is gradually charged to the first capacitor C1 according to a time constant. Before the first capacitor C1 is charged with a predetermined amount or more, the third switching element SW3 and the fourth switching element SW4 are in an open state (that is, a turn-off state), so that the output voltage is applied to the load terminal 200. It is not supplied.

Thereafter, when a predetermined amount of charge is charged to the first capacitor C1 and a current greater than or equal to a reference value is supplied to the third terminal of the third switching element SW3, the third switching element SW3 is turned on.

Then, a voltage is applied to the fourth switching element SW4 according to the voltage distribution of the ninth resistance element R9, the tenth resistance element R10, and the eleventh resistance element R11, so that the fourth switching element SW4 is applied. It is turned on, and a voltage is supplied to the load terminal 200.

Even if the voltage supply to the load terminal 200 starts, the first capacitor (C1) continues to charge until the maximum charge charge amount, so the magnitude of the output voltage supplied to the load terminal 200 is the first capacitor ( It gradually increases with time constant until the maximum charge is charged to C1).

3 is a configuration diagram of a voltage control device according to a second embodiment of the present invention.

Referring to FIG. 3, the voltage control device 100 according to an embodiment of the present invention includes a power supply unit 110, a first control unit 120, a second control unit 130, and a delay output unit 140 as shown in FIG. 1. ) And the driving unit 150, and may further include a noise removing unit 160.

The contents of the power supply unit 110, the first control unit 120, the second control unit 130, the delay output unit 140, and the driving unit 150 are the same as those described with reference to FIG. 1, and a detailed description thereof will be omitted. do.

The noise removing unit 160 may remove a noise signal generated during at least one of the first control unit 120 and the delay output unit 140.

The first control unit 120 and the delay output unit 140 control the inrush current by operating a plurality of switching elements included in each or supply the output voltage to the load terminal 200, wherein noise is generated according to the operation of the switching element. Signals may occur.

The noise removing unit 160 may be connected to at least one of the first control unit 120 and the delay output unit 140 to remove the noise signal generated according to the operation of the switching element. In this case, the noise signal may include not only a signal generated according to the operation of the switching element, but also a noise signal generated as another configuration of the voltage control device 100 according to an embodiment of the present invention operates.

4 is a circuit diagram of a voltage control device according to a second embodiment.

As illustrated in FIG. 4, the voltage control device 100 according to an embodiment of the present invention may further include at least one capacitor for removing noise in the circuit configuration shown in FIG. 2.

The noise removing unit 160 may include at least one of a second capacitor C2 disposed between the first control unit 120 and the delay output unit 140 and a third capacitor C3 disposed in the delay output unit 140. It can contain. The second capacitor C2 and the third capacitor C3 absorb noise signals generated in a driving process, such as a switching operation of the voltage control device 100.

In the second capacitor C2, the first terminal is connected to the first terminal of the second resistor element R2 and the second terminal is connected to the first terminal of the fifth resistor element R5.

In the third capacitor C3, the first terminal is connected to the second terminal of the fourth switching element SW4, and the second terminal is connected to the first terminal of the eleventh resistor.

In FIG. 4, the second capacitor C2 and the third capacitor C3 are shown together, but according to an embodiment of the present invention, the noise removing unit 160 may include the second capacitor C2 or the third capacitor C3. It may contain any one of the following.

5 is a circuit diagram of a voltage control device according to a third embodiment.

According to an embodiment of the present invention, as illustrated in FIG. 5, the twelfth resistance element R12 of the driving unit 150 may include at least one diode element. When a forward voltage is applied to the diode, a voltage drop occurs, so it can have the same effect as a resistor element.

For example, as illustrated in FIG. 4, the twelfth resistance element R12 of the driver 150 may be implemented in a form in which the first diode D1 element and the second diode D2 element are connected in series. The cathode terminal of the first diode D1 is connected to the power supply unit 110, the cathode terminal of the second diode D2 is connected to the anode terminal of the first diode D1, and the anode terminal of the second diode D2 May be connected to the first end of the thirteenth resistance element R13.

When the twelfth resistance element R12 is implemented as at least one diode element, there is an effect of blocking the reverse voltage applied to the power supply unit 110.

6 is a view showing the output voltage simulation result of the voltage control device according to an embodiment of the present invention.

6 shows the magnitude of the output voltage supplied to the load terminal 200 along the time axis when the power supply unit 110 applies a DC voltage having a size of 16 [V].

As shown in FIG. 6, after the output voltage forming a waveform by charging and discharging of the delay output unit 140 increases linearly for a certain period of time (1 second in FIG. 5 ), an output voltage having a size of 12[V] is increased. It can be confirmed that it is supplied to the load stage 200. Through this, it is possible to supply a stable voltage to the load terminal 200 without the influence of the inrush current.

The term'~ unit' used in this embodiment means a software or hardware component such as a field-programmable gate array (FPGA) or an ASIC, and the'~ unit' performs certain roles. However,'~ wealth' is not limited to software or hardware. The'~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example,'~ unit' refers to components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, database, data structures, tables, arrays, and variables. The functions provided within components and'~units' may be combined into a smaller number of components and'~units', or further separated into additional components and'~units'. In addition, the components and'~ unit' may be implemented to play one or more CPUs in the device or secure multimedia card.

The embodiments have been mainly described above, but this is merely an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above without departing from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. And differences related to these modifications and applications should be construed as being included in the scope of the invention defined in the appended claims.

100: voltage control device
110: power supply
120: first control unit
130: second control unit
140: delay output
150: driving unit
160: noise removing unit

Claims (12)

A power supply unit that supplies a DC voltage,
A first control unit that receives the DC voltage and controls the inrush current generated when a plurality of switching elements repeat the on-off operation to apply the DC voltage,
If the magnitude of the inrush current exceeds a predetermined value, the second control unit to turn off the switching element of the first control unit, and
Receiving a DC voltage controlled by the inrush current and outputting an output voltage to a load stage, including a delay output unit that increases the magnitude of the output voltage for a period of time until the inrush current reaches the magnitude of the controlled DC voltage Voltage control device. According to claim 1,
And a driving unit supplying a driving voltage driving the first control unit for the first time. According to claim 2,
The first control unit,
When the driving voltage is input, the plurality of switching elements are turned on, and when the ground power is input from the second control unit, the plurality of switching elements are turned off to control the inrush current. According to claim 1,
The second control unit,
When the magnitude of the inrush current exceeds a predetermined value, a voltage control device that turns off a plurality of switching elements of the first control unit by applying a ground power to the first control unit. According to claim 1,
The delay output unit,
When a predetermined amount of charge is charged according to a preset time constant, the switching element is turned on to increase the magnitude of the output voltage according to the time constant until the inrush current reaches the controlled DC voltage level. According to claim 1,
And a noise removing unit removing a noise signal generated during at least one of the first control unit and the delay output unit. According to claim 1,
The first control unit,
A first switching element having a first terminal connected to a positive terminal of the power source,
A first resistor element having a first terminal connected to a second terminal of the first switching element,
A second resistor element having a first terminal connected to a third terminal of the first switching element,
A third resistor element having a first terminal connected to a second terminal of the second resistor element and a second terminal connected to a ground terminal,
The first end is connected to the first end of the second resistance element, the second end is connected to the second end of the first resistance element, and the third end is connected to the second end of the second resistance element. A voltage control device comprising a second switching element. According to claim 1,
The second control unit,
A fourth resistor element having a first end connected to the first control unit,
A fifth resistor element having a first terminal connected to a second terminal of the fourth resistor element, and a second terminal connected to a ground terminal, and
A voltage control device including a regulator element having a first terminal connected to the ground terminal, a second terminal connected to the first controller, and a third terminal connected to the second terminal of the fourth resistance element. According to claim 1,
The delay output unit,
A sixth resistance element having a first stage connected to the first control unit,
A seventh resistance element, the first terminal of which is connected to the second terminal of the sixth resistance element, and the second terminal of which is connected to the ground terminal,
An eighth resistance element having a first end connected to a second end of the sixth resistance element,
A first capacitor having a first terminal connected to the second terminal of the eighth resistance element, and a second terminal connected to the ground terminal,
A ninth resistance element, the first end being connected to the first end of the sixth resistance element,
A tenth resistance element, the first end being connected to the second end of the ninth resistance element,
A third switching element in which a first terminal is connected to the second terminal of the tenth resistance element, and a third terminal is connected to the second terminal of the eighth resistance element,
An eleventh resistance element having a first terminal connected to a second terminal of the third switching element, and a second terminal connected to a ground terminal, and
The first end is connected to the first end of the ninth resistance element, the second end is connected to the first end of the eleventh resistance element, and the third end is connected to the second end of the ninth resistance element. A voltage control device comprising a fourth switching element. According to claim 2,
The driving unit,
A twelfth resistance element having a first terminal connected to the power source,
A thirteenth resistance element having a first terminal connected to a second terminal of the twelfth resistance element and a second terminal connected to a ground terminal,
A 14th resistance element having a first end connected to the first end of the twelfth resistance element and the first control unit,
A fifth switching element having a first terminal connected to the first controller, a second terminal connected to the second terminal of the fourteenth resistance element, and a third terminal connected to the second terminal of the twelfth resistance element. Voltage control device, The method of claim 10,
The twelfth resistance element,
A voltage control device comprising at least one diode element. The method of claim 6,
The noise removal unit,
And a second capacitor disposed between the first control unit and the delay output unit and at least one of a third capacitor disposed in the delay output unit.

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