KR102567571B1 - Module combined Bi-directional DC/DC Converter - Google Patents

Module combined Bi-directional DC/DC Converter Download PDF

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KR102567571B1
KR102567571B1 KR1020210115382A KR20210115382A KR102567571B1 KR 102567571 B1 KR102567571 B1 KR 102567571B1 KR 1020210115382 A KR1020210115382 A KR 1020210115382A KR 20210115382 A KR20210115382 A KR 20210115382A KR 102567571 B1 KR102567571 B1 KR 102567571B1
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connection terminal
connection
series
converter
exposed
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KR1020210115382A
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KR20230032482A (en
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이창호
레동부
김국현
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주식회사 지엔이피에스
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

본 발명은 모듈 결합형 양방향 DC/DC 컨버터에 관한 것으로서, 제1커패시터의 양단과 각각 접속되어 외부로 노출된 제1 및 제2 접속단자와, 제2커패시터의 양단과 각각 접속되어 외부로 노출된 제3 및 제4접속단자와, 제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제1 및 제2스위치소자와, 일단은 제1접속단자와 접속되어 있고 타단은 제1 및 제2스위치 소자 사이의 제1직렬 연결선에 접속된 제1인덕터를 구비하고, 제1스위치소자의 제1직렬 연결선과 접속된 하단 맞은편의 상단은 제3접속단자와 접속되어 있고, 제2스위치소자의 제1직렬 연결선과 접속된 상단 맞은편의 하단은 제4접속단자와 접속되게 결선되어 있고, 제2접속단자와 상기 제4접속단자는 제1공통선을 통해 상호 접속된다. 이러한 모듈 결합형 양방향 DC/DC 컨버터에 의하면, 모듈형태로 복수개를 상호 접속하여 사용할 수 있도록 지원하여 다양한 입력범위에 맞게 적용할 수 있는 장점을 제공한다. The present invention relates to a module-coupled bidirectional DC/DC converter, in which first and second connection terminals are connected to both ends of a first capacitor and are exposed to the outside, and are connected to both ends of a second capacitor and are exposed to the outside. Third and fourth connection terminals, and first and second switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other, one end connected to the first connection terminal and the other end connected to the first and second switch elements A first inductor connected to the first series connection line between the second switch elements is provided, the upper end opposite the lower end connected to the first series connection line of the first switch element is connected to the third connection terminal, and the second switch element The lower end opposite the upper end connected to the first series connection line of is connected to the fourth connection terminal, and the second connection terminal and the fourth connection terminal are interconnected through a first common line. According to this module-coupled bidirectional DC/DC converter, it provides the advantage of being applicable to a variety of input ranges by supporting a plurality of modules to be interconnected and used.

Description

모듈 결합형 양방향 DC/DC 컨버터{Module combined Bi-directional DC/DC Converter}Module combined Bi-directional DC/DC Converter {Module combined Bi-directional DC/DC Converter}

본 발명은 양방향 DC/DC 컨버터에 관한 것으로서, 모듈형태로 형성되어 단독 또는 복수개를 상호 접속하여 사용할 수 있도록 지원하는 모듈 결합형 양방향 DC/DC 컨버터에 관한 것이다. The present invention relates to a bidirectional DC/DC converter, and relates to a module-coupled bidirectional DC/DC converter that is formed in the form of a module and supports a single or a plurality of interconnected bidirectional DC/DC converters for use.

전력변환기 중 승압 또는 강압 컨버터는 입출력 정의에 따라 승압 또는 감압 컨버터로 만 사용 가능하며 입력전압 운용범위가 제한적이나, 전류도통 루프에서 스위치 소자 1개 도통으로 고효율화가 가능한 특징이 있다. Among power converters, step-up or step-down converters can only be used as step-up or step-down converters according to the definition of input and output, and have a limited input voltage operating range, but can be highly efficient with one switch element conducting in a current conduction loop.

승강압 컨버터의 경우 입출력 정의에 관계없이 승강압을 할 수 있으며 입력전압 운용범위의 제한이 없으나, 전류도통 루프에서 스위치 소자 2개 도통으로 고효율화가 어렵다.In the case of a buck-boost converter, it can step-up and step-down regardless of the definition of input and output, and there is no limit on the operating range of the input voltage, but it is difficult to achieve high efficiency due to the conduction of two switch elements in the current conduction loop.

양방향 DC/DC 컨버터는 컨버터의 양단 중 일단에 입력 전압을 가하면 타단으로 승압 또는 강압된 출력 전압이 나오는 회로이다. 이러한 양방향 DC/DC 컨버터는 국내 등록특허 제10-1678451호 등 다양하게 개시되어 있다. A bidirectional DC/DC converter is a circuit in which an input voltage is applied to one of the both ends of the converter and a step-up or step-down output voltage is output to the other end. Such bi-directional DC/DC converters are variously disclosed, such as Korean Patent Registration No. 10-1678451.

일반적으로 양방향 전력흐름이 가능하며 양방향 모두 승·강압을 할 수 있는 컨버터로서 동기정류를 적용한 벅-부스트 컨버터와 축(C'uk) 컨버터, 세픽(SEPIC) 컨버터가 있다. In general, bidirectional power flow is possible and converters capable of step-up and step-down in both directions include buck-boost converters, axial (C'uk) converters, and SEPIC converters to which synchronous rectification is applied.

그러나 이들은 스위치의 전압정격이 입·출력 전압의 합으로 매우 크고, 전류도통 루프에서 스위칭 소자가 2개씩 도통하여 고효율화가 어렵다는 단점이 있다.However, these switches have a disadvantage in that the voltage rating of the switch is very high as the sum of the input and output voltages, and it is difficult to achieve high efficiency because two switching elements are conducted in a current conduction loop.

한편, 국내외에서 에너지 효율을 높일 수 있는 다양한 전압(250~1500[V])의 DC-Grid에 대한 수요가 급증하고 있다. 다양한 DC-Grid 전압에 대응하기 위해 전력변환기를 모듈화 형태를 바탕으로 병렬운전을 통해 용량을 가변할 수 있는 구조가 요구되고 있다.On the other hand, demand for DC-Grid of various voltages (250~1500 [V]) that can increase energy efficiency is rapidly increasing at home and abroad. In order to respond to various DC-grid voltages, a structure that can vary the capacity through parallel operation based on modularization of power converters is required.

본 발명은 상기와 같은 요구사항을 해결하기 위하여 창안된 것으로서, 상호 접속이 가능하게 지원하는 모듈화 형태로 형성되어 다양한 직류 전압범위에 대한 승강압을 양방향을 지원할 수 있는 모듈 결합형 양방향 DC/DC 컨버터를 제공하는데 그 목적이 있다.The present invention was invented to solve the above requirements, and is formed in a modular form that supports interconnection and supports bidirectional step-up and step-down for various DC voltage ranges. Its purpose is to provide

상기의 목적을 달성하기 위하여 본 발명에 따른 모듈 결합형 양방향 DC/DC 컨버터는 제1커패시터의 양단과 각각 접속되어 외부로 노출된 제1 및 제2 접속단자와; 제2커패시터의 양단과 각각 접속되어 외부로 노출된 제3 및 제4접속단자와; 제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제1 및 제2스위치소자와; 일단은 상기 제1접속단자와 접속되어 있고 타단은 상기 제1 및 제2스위치 소자 사이의 제1직렬 연결선에 접속된 제1인덕터;를 구비하고, 상기 제1스위치소자의 상기 제1직렬 연결선과 접속된 하단 맞은편의 상단은 상기 제3접속단자와 접속되어 있고, 상기 제2스위치소자의 상기 제1직렬 연결선과 접속된 상단 맞은편의 하단은 상기 제4접속단자와 접속되게 결선되어 있고, 상기 제2접속단자와 상기 제4접속단자는 제1공통선을 통해 상호 접속된다. In order to achieve the above object, a module-coupled bidirectional DC/DC converter according to the present invention includes first and second connection terminals connected to both ends of a first capacitor and exposed to the outside; third and fourth connection terminals connected to both ends of the second capacitor and exposed to the outside; first and second switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other; and a first inductor having one end connected to the first connection terminal and the other end connected to a first series connection line between the first and second switch elements, and a first inductor connected to the first series connection line of the first switch element. The upper end opposite the connected lower end is connected to the third connection terminal, and the lower end opposite the upper end connected to the first series connection line of the second switch element is connected to the fourth connection terminal, and the second switch element is connected to the fourth connection terminal. The second connection terminal and the fourth connection terminal are interconnected through a first common line.

바람직하게는 상기 제1 및 제2 접속단자는 상기 제1 및 제2커패시터, 상기 제1인덕터, 상기 제1 및 제2스위치소자가 내장되게 수용되는 단위 하우징의 일측에 노출되게 배치되어 있고, 상기 제3 및 제4 접속단자는 상기 단위 하우징의 타측에 노출되게 배치된다.Preferably, the first and second connection terminals are disposed to be exposed on one side of a unit housing in which the first and second capacitors, the first inductor, and the first and second switch elements are accommodated, and The third and fourth connection terminals are disposed to be exposed on the other side of the unit housing.

또한, 본 발명의 일 측면에 따르면, 제3커패시터의 양단과 각각 접속되어 외부로 노출된 제5 및 제6접속단자와; 제4커패시터의 양단과 각각 접속되어 외부로 노출되며 상기 제3접속단자와 접속되는 제7접속단자와 상기 제4접속단자와 접속되는 제8접속단자와; 제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제3 및 제4스위치소자와; 일단은 상기 제5접속단자와 접속되어 있고 타단은 상기 제3 및 제4스위치 소자 사이의 제2직렬 연결선에 접속된 제2인덕터;를 구비하고, 상기 제3스위치소자의 상기 제2직렬 연결선과 접속된 하단 맞은편의 상단은 상기 제7접속단자와 접속되어 있고, 상기 제4스위치소자의 상기 제2직렬 연결선과 접속된 상단 맞은편의 하단은 상기 제6접속단자와 접속되게 결선되어 있고, 상기 제6접속단자와 상기 제8접속단자는 제2공통선을 통해 상호 접속된 구조로 이용될 수 있다.Further, according to one aspect of the present invention, fifth and sixth connection terminals connected to both ends of the third capacitor and exposed to the outside; a seventh connection terminal connected to both ends of the fourth capacitor and exposed to the outside and connected to the third connection terminal and an eighth connection terminal connected to the fourth connection terminal; third and fourth switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other; A second inductor having one end connected to the fifth connection terminal and the other end connected to a second series connection line between the third and fourth switch elements, and a second inductor connected to the second series connection line of the third switch element and The upper end opposite the connected lower end is connected to the seventh connection terminal, the lower end opposite the upper end connected to the second series connection line of the fourth switch element is connected to the sixth connection terminal, and the The 6 connection terminal and the 8 connection terminal may be used in a structure interconnected through a second common line.

또 다르게는 제3커패시터의 양단과 각각 접속되어 외부로 노출되며 상기 제1접속단자와 접속되는 제5접속단자 및 상기 제2접속단자와 접속되는 제6접속단자와; 제4커패시터의 양단과 각각 접속되어 외부로 노출되는 제7접속단자와 제8접속단자와; 제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제3 및 제4스위치소자와; 일단은 상기 제5접속단자와 접속되어 있고 타단은 상기 제3 및 제4스위치 소자 사이의 제2직렬 연결선에 접속된 제2인덕터;를 구비하고, 상기 제3스위치소자의 상기 제2직렬 연결선과 접속된 하단 맞은편의 상단은 상기 제7접속단자와 접속되어 있고, 상기 제4스위치소자의 상기 제2직렬 연결선과 접속된 상단 맞은편의 하단은 상기 제8접속단자와 접속되게 결선되어 있고, 상기 제6접속단자와 상기 제8접속단자는 제2공통선을 통해 상호 접속된 구조로 이용될 수 있다.Alternatively, a fifth connection terminal connected to both ends of the third capacitor and exposed to the outside and connected to the first connection terminal and a sixth connection terminal connected to the second connection terminal; a seventh connection terminal and an eighth connection terminal connected to both ends of the fourth capacitor and exposed to the outside; third and fourth switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other; A second inductor having one end connected to the fifth connection terminal and the other end connected to a second series connection line between the third and fourth switch elements, and a second inductor connected to the second series connection line of the third switch element and The upper end opposite the connected lower end is connected to the seventh connection terminal, the lower end opposite the upper end connected to the second series connection line of the fourth switch element is connected to the eighth connection terminal, and the The 6 connection terminal and the 8 connection terminal may be used in a structure interconnected through a second common line.

본 발명에 따른 모듈 결합형 양방향 DC/DC 컨버터에 의하면, 모듈형태로 복수개를 상호 접속하여 사용할 수 있도록 지원하여 다양한 입력범위에 맞게 적용할 수 있는 장점을 제공한다. According to the module-coupled bidirectional DC / DC converter according to the present invention, it provides the advantage of being applicable to a variety of input ranges by supporting a plurality of mutually connected and used modules in the form of modules.

도 1은 본 발명에 따른 모듈 결합형 양방향 DC/DC 컨버터를 나타내 보인 도면이고,
도 2는 본 발명의 일 실시예에 따른 결합구조를 설명하기 위한 도면이고,
도 3은 본 발명의 또 다른 실시예에 따른 결합구조를 설명하기 위한 도면이다.1 is a diagram showing a module-coupled bidirectional DC/DC converter according to the present invention;
2 is a view for explaining a coupling structure according to an embodiment of the present invention,
3 is a view for explaining a coupling structure according to another embodiment of the present invention.

이하, 첨부된 도면을 참조하면서 본 발명의 바람직한 실시예에 따른 모듈 결합형 양방향 DC/DC 컨버터를 더욱 상세하게 설명한다.Hereinafter, a module-coupled bidirectional DC/DC converter according to a preferred embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 모듈 결합형 양방향 DC/DC 컨버터를 나타내 보인 도면이다. 1 is a diagram showing a module-coupled bidirectional DC/DC converter according to the present invention.

도 1을 참조하면, 본 발명에 따른 모듈 결합형 양방향 DC/DC 컨버터(100)는 단위 하우징(110)과, 단위 하우징(110)에 장착되어 양방향 승강압을 지원하는 회로요소인 제1 및 제2커패시터(C1)(C2)(121)(122), 제1 및 제2스위치소자(Q1)(Q2)(131)(132), 제1인덕터(151)를 구비한다.Referring to FIG. 1, a module-coupled bidirectional DC/DC converter 100 according to the present invention includes a unit housing 110, and first and second circuit elements mounted on the unit housing 110 to support bidirectional step-up and step-down. 2 capacitors (C1) (C2) (121) (122), first and second switch elements (Q1) (Q2) (131) (132), and a first inductor (151).

여기서, 단위 하우징(110)은 회로요소가 내장될 수 있는 내장공간을 갖으며 회로요소를 보호할 수 있게 형성되면 된다. Here, the unit housing 110 may have a built-in space in which circuit elements can be embedded and be formed to protect the circuit elements.

제1접속단자(P1)(111)은 제1커패시터(C1)(121)의 일단과 접속되어 단위 하우징(110) 외부로 노출되게 마련되어 있다.The first connection terminal (P1) 111 is connected to one end of the first capacitor (C1) 121 and exposed to the outside of the unit housing 110.

제2접속단자(N1)(112)는 제1커패시터(C1)(121)의 타단과 접속되어 단위 하우징(110) 외부로 노출되게 마련되어 있다.The second connection terminal (N1) 112 is connected to the other end of the first capacitor (C1) 121 and exposed to the outside of the unit housing 110.

제3접속단자(P2)(113)는 제2커패시터(C2)(122)의 일단과 접속되어 단위 하우징(110) 외부로 노출되게 마련되어 있다.The third connection terminal (P2) 113 is connected to one end of the second capacitor (C2) 122 and exposed to the outside of the unit housing 110.

제4접속단자(N2)(114)는 제2커패시터(C2)(122)의 타단과 접속되어 단위 하우징(110) 외부로 노출되게 마련되어 있다.The fourth connection terminal (N2) 114 is connected to the other end of the second capacitor (C2) 122 and exposed to the outside of the unit housing 110.

제1 및 제2스위치소자(131)(132)는 제1 및 제2 게이트단자(131a)(132a)를 통해 인가되는 제어신호의 유무에 따라 턴온 또는 턴오프 되며 제1직렬연결선(135)을 통해 상호 직렬상으로 접속되어 있다. 제1스위치소자(131)의 제1직렬 연결선(135)과 접속된 하단 맞은편의 상단은 제3접속단자(113)와 접속되어 있고, 제2스위치소자(132)의 제1직렬 연결선(135)과 접속된 상단 맞은편의 하단은 제4접속단자(114)와 접속되게 결선되어 있다.The first and second switch elements 131 and 132 are turned on or off according to the presence or absence of a control signal applied through the first and second gate terminals 131a and 132a, and connect the first serial connection line 135. are connected in series with each other. The upper end opposite the lower end connected to the first series connection line 135 of the first switch element 131 is connected to the third connection terminal 113, and the first series connection line 135 of the second switch element 132 The lower end opposite the upper end connected to is connected to the fourth connection terminal 114.

참조부호 D1, D2는 제1 및 제2스위치소자(131)(132)에 역방향으로 병렬접속된 프리휠 다이오드이다.Reference numerals D1 and D2 denote freewheel diodes connected in parallel to the first and second switch elements 131 and 132 in reverse directions.

제1 및 제2 게이트단자(131a)(132a)는 단위 하우징(110) 외부에서 제어신호를 수신받을 수 있도록 단위 하우징(110) 외부에 마련된 제어단자(미도시)와 각각 접속되어 있다.The first and second gate terminals 131a and 132a are respectively connected to control terminals (not shown) provided outside the unit housing 110 to receive control signals from outside the unit housing 110 .

제1인덕터(L1)(151)는 일단이 제1접속단자(111)와 접속되어 있고 타단은 제1 및 제2스위치 소자(131)(132) 사이의 제1직렬 연결선(135)에 접속되어 있다.The first inductor (L1) 151 has one end connected to the first connection terminal 111 and the other end connected to the first series connection line 135 between the first and second switch elements 131 and 132 there is.

제1공통선(161)은 제2접속단자(112)와 제4접속단자(114)를 상호 연결하는 선이다.The first common line 161 is a line connecting the second connection terminal 112 and the fourth connection terminal 114 to each other.

이러한 구조에서 제1 및 제2 접속단자(111)(112)는 제1 및 제2커패시터(121)(122), 제1인덕터(151), 제1 및 제2스위치소자(131)(132)가 내장되게 수용되는 단위 하우징(110)의 일측에 노출되게 배치되어 있고, 제3 및 제4 접속단자(113)(114)는 단위 하우징(110)의 타측에 노출되게 배치되는 것이 바람직하다.In this structure, the first and second connection terminals 111 and 112 include the first and second capacitors 121 and 122, the first inductor 151, and the first and second switch elements 131 and 132 is disposed to be exposed on one side of the unit housing 110 in which is accommodated, and the third and fourth connection terminals 113 and 114 are preferably disposed to be exposed on the other side of the unit housing 110.

이러한 양방향 DC/DC 컨버터(100)는 하나의 단위 모듈로서 제1스위치 소자(131)와 제2스위치소자(132)의 소자의 선택적 구동에 의해 양방향에 대해 승압, 강압을 지원할 수 있으며, 전력변환에 따른 손실을 최소화할 수 있다.The bi-directional DC/DC converter 100, as a unit module, can support step-up and step-down in both directions by selectively driving the first switch element 131 and the second switch element 132, and convert power. losses can be minimized.

또한, 다양한 직류 전압범위에 양방향 DC/DC 컨버터(100)를 복수개 접속하여 이용할 수 있고, 고전압 변환이 요구될 때 도 2에 도시된 구조로 결합하여 사용하면 된다. 설명의 편의를 위해 앞서 도 1을 통해 설명된 양방향 DC/DC 컨버터(100)를 제1양방향 DC/DC컨버터라 하고, 이에 접속되는 동일 구조의 컨버터에 대해 제2양방향 DC/DC컨버터(200)로 명명하여 설명한다. In addition, a plurality of bidirectional DC/DC converters 100 may be connected and used in various DC voltage ranges, and when high voltage conversion is required, the structure shown in FIG. 2 may be combined and used. For convenience of explanation, the bidirectional DC/DC converter 100 previously described with reference to FIG. 1 is referred to as a first bidirectional DC/DC converter, and the second bidirectional DC/DC converter 200 is referred to as a converter having the same structure connected thereto. Named and explained.

도 2를 참조하면, 제2양방향 DC/DC컨버터(200)는 제3커패시터(C3)의 양단과 각각 접속되어 외부로 노출된 제5 및 제6접속단자(115)(116)가 마련되어 있다.Referring to FIG. 2 , the second bi-directional DC/DC converter 200 is provided with fifth and sixth connection terminals 115 and 116 connected to both ends of the third capacitor C3 and exposed to the outside, respectively.

또한, 제7접속단자(117)는 제4커패시터(C4)의 일단과 접속되어 외부로 노출되며 외부에서 제3접속단자와 결합된다.In addition, the seventh connection terminal 117 is connected to one end of the fourth capacitor C4, exposed to the outside, and coupled to the third connection terminal from the outside.

제8접속단자(118)는 제4커패시터(C4)의 타단과 접속되어 외부로 노출되며 외부에서 제4접속단자(114)와 접속된다.The eighth connection terminal 118 is connected to the other end of the fourth capacitor C4 and exposed to the outside, and is connected to the fourth connection terminal 114 from the outside.

제3 및 제4스위치 소자(Q3)(Q4)는 제3 및 제4 게이트단자(133a)(134a)를 통해 인가되는 제어신호의 유무에 따라 턴온 또는 턴오프 되며 제2직렬연결선(136)을 통해 상호 직렬상으로 접속되어 있다. The third and fourth switch elements Q3 and Q4 are turned on or off according to the presence or absence of a control signal applied through the third and fourth gate terminals 133a and 134a, and connect the second series connection line 136. are connected in series with each other.

제2인덕터(L2)는 일단이 제5접속단자(115)와 접속되어 있고 타단은 제3 및 제4스위치 소자(Q3)(Q4) 사이의 제2직렬 연결선(136)에 접속되어 있다.The second inductor L2 has one end connected to the fifth connection terminal 115 and the other end connected to the second series connection line 136 between the third and fourth switch elements Q3 and Q4.

앞서와 마찬가지로 제3스위치소자(Q3)의 제2직렬 연결선(136)과 접속된 하단 맞은편의 상단은 제7접속단자(117)와 접속되어 있고, 제4스위치소자(Q4)의 제2직렬 연결선(136)과 접속된 상단 맞은편의 하단은 제6접속단자(116)와 접속되게 결선되어 있고, 제6접속단자(116)와 제8접속단자(118)는 제2공통선(162)을 통해 상호 접속되어 있다. 참조부호 D3, D4는 제3 및 제4스위치소자(Q3)(Q4)에 역방향으로 병렬접속된 프리휠 다이오드이다.As before, the upper end opposite the lower end connected to the second series connection line 136 of the third switch element Q3 is connected to the seventh connection terminal 117, and the second series connection line of the fourth switch element Q4 The lower end opposite the upper end connected to (136) is wired to be connected to the sixth connection terminal 116, and the sixth connection terminal 116 and the eighth connection terminal 118 are connected through the second common line 162. are interconnected. Reference numerals D3 and D4 denote freewheel diodes connected in parallel to the third and fourth switch elements Q3 and Q4 in reverse directions.

이러한 구조는 앞서 도 1을 통해 설명된 양방향 컨버터(100) 2개를 인덕터가 상호 거리가 멀어지는 방향에 미러형태로 배치되게 도 2에 도시된 구조로 접속하면 된다.This structure can be obtained by connecting the two bi-directional converters 100 described above with reference to FIG. 1 in the structure shown in FIG. 2 so that the inductors are disposed in a mirror shape in a direction in which a mutual distance is increased.

이러한 구조는 돌입전류(inrush current)가 크지만 리플을 작으며 고전압에 대한 승강압 변환을 지원할 수 있다.This structure has a large inrush current, but a small ripple, and can support step-up and step-down conversion for high voltage.

이와는 다르게 앞서 도 1을 통해 설명된 양방향 컨버터(100) 2개를 인덕터가 상호 가까워지는 방향에 미러형태로 배치되게 도 3에 도시된 구조로 접속하여 사용할 수 있다. 도 3에서 도 2와 동일구조는 동일 참조부호로 표기한다. Unlike this, the two bidirectional converters 100 described above with reference to FIG. 1 may be connected and used in the structure shown in FIG. 3 so that the inductors are arranged in a mirror shape in a direction in which the inductors become closer to each other. In FIG. 3, the same structures as those in FIG. 2 are denoted by the same reference numerals.

도 3을 참조하면, 도 2의 제2양방향 컨버터(200)가 제1양방향 컨버터(110)의 좌측에서 결합되어 있다.Referring to FIG. 3 , the second bi-directional converter 200 of FIG. 2 is coupled to the left side of the first bi-directional converter 110 .

즉, 제5접속단자(115)가 제1접속단자(111)와 접속되어 있고, 제6접속단자(116)가 제2접속단자(112)와 접속되어 있다. That is, the fifth connection terminal 115 is connected to the first connection terminal 111 and the sixth connection terminal 116 is connected to the second connection terminal 112 .

이러한 구조에 의하면, 돌입전류(inrush current)가 작고, 리플을 크지만 저전압에 대한 승강압 변환을 효율적으로 지원할 수 있다.According to this structure, although the inrush current is small and the ripple is large, step-up and step-down conversion for low voltage can be efficiently supported.

이상에서 설명된 모듈 결합형 양방향 DC/DC 컨버터는 DC-그리(grid) 분산전원의 소스에 따라 승압, 강압, 승강압 기능이 요구될 때 전압범위 및 용도에 맞게 하나 또는 복수개를 모듈형태로 상호 접속하여 다양한 입력범위에 맞게 사용할 수 있도록 지원할 수 있는 장점을 제공한다.The module-coupled bi-directional DC/DC converter described above is one or more modules in the form of a module to suit the voltage range and purpose when step-up, step-down, step-up and step-down functions are required depending on the source of the DC-grid distributed power supply. It provides the advantage that it can be connected and used according to various input ranges.

110: 단위 하우징 121: 제1커패시터
122: 제2커패시터 131: 제1스위치소자
132: 제2스위치 소자 151: 제1인덕터110: unit housing 121: first capacitor
122: second capacitor 131: first switch element
132: second switch element 151: first inductor

Claims (4)

삭제delete 삭제delete 삭제delete 제1커패시터의 양단과 각각 접속되어 외부로 노출된 제1 및 제2 접속단자와;
제2커패시터의 양단과 각각 접속되어 외부로 노출된 제3 및 제4접속단자와;
제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제1 및 제2스위치소자와;
일단은 상기 제1접속단자와 접속되어 있고 타단은 상기 제1 및 제2스위치 소자 사이의 제1직렬 연결선에 접속된 제1인덕터;를 구비하고,
상기 제1스위치소자의 상기 제1직렬 연결선과 접속된 하단 맞은편의 상단은 상기 제3접속단자와 접속되어 있고, 상기 제2스위치소자의 상기 제1직렬 연결선과 접속된 상단 맞은편의 하단은 상기 제4접속단자와 접속되게 결선되어 있고, 상기 제2접속단자와 상기 제4접속단자는 제1공통선을 통해 상호 접속되며,
제3커패시터의 양단과 각각 접속되어 외부로 노출되며 상기 제1접속단자와 접속되는 제5접속단자 및 상기 제2접속단자와 접속되는 제6접속단자와;
제4커패시터의 양단과 각각 접속되어 외부로 노출되는 제7접속단자와 제8접속단자와;
제어신호의 유무에 따라 턴온 또는 턴오프 되며 상호 직렬상으로 접속된 제3 및 제4스위치소자와;
일단은 상기 제5접속단자와 접속되어 있고 타단은 상기 제3 및 제4스위치 소자 사이의 제2직렬 연결선에 접속된 제2인덕터;를 구비하고,
상기 제3스위치소자의 상기 제2직렬 연결선과 접속된 하단 맞은편의 상단은 상기 제7접속단자와 접속되어 있고, 상기 제4스위치소자의 상기 제2직렬 연결선과 접속된 상단 맞은편의 하단은 상기 제8접속단자와 접속되게 결선되어 있고, 상기 제6접속단자와 상기 제8접속단자는 제2공통선을 통해 상호 접속된 것을 특징으로 하는 모듈 결합형 양방향 DC/DC 컨버터.

first and second connection terminals connected to both ends of the first capacitor and exposed to the outside;
third and fourth connection terminals connected to both ends of the second capacitor and exposed to the outside;
first and second switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other;
A first inductor having one end connected to the first connection terminal and the other end connected to a first series connection line between the first and second switch elements,
The upper end opposite the lower end connected to the first series connection line of the first switch element is connected to the third connection terminal, and the lower end opposite the upper end connected to the first series connection line of the second switch element is connected to the third connection terminal. It is wired to be connected to 4 connection terminals, and the second connection terminal and the fourth connection terminal are interconnected through a first common line,
a fifth connection terminal connected to both ends of the third capacitor and exposed to the outside and connected to the first connection terminal and a sixth connection terminal connected to the second connection terminal;
a seventh connection terminal and an eighth connection terminal connected to both ends of the fourth capacitor and exposed to the outside;
third and fourth switch elements turned on or off depending on the presence or absence of a control signal and connected in series with each other;
A second inductor having one end connected to the fifth connection terminal and the other end connected to a second series connection line between the third and fourth switch elements,
The upper end opposite the lower end connected to the second series connection line of the third switch element is connected to the seventh connection terminal, and the lower end opposite the upper end connected to the second series connection line of the fourth switch element is connected to the second series connection line. A module-coupled bidirectional DC/DC converter, characterized in that it is wired to be connected to 8 connection terminals, and the sixth connection terminal and the eighth connection terminal are interconnected through a second common line.
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