KR101683994B1 - DC-DC converter circuit - Google Patents

DC-DC converter circuit Download PDF

Info

Publication number
KR101683994B1
KR101683994B1 KR1020140152519A KR20140152519A KR101683994B1 KR 101683994 B1 KR101683994 B1 KR 101683994B1 KR 1020140152519 A KR1020140152519 A KR 1020140152519A KR 20140152519 A KR20140152519 A KR 20140152519A KR 101683994 B1 KR101683994 B1 KR 101683994B1
Authority
KR
South Korea
Prior art keywords
voltage
transformer
output
circuit
converter circuit
Prior art date
Application number
KR1020140152519A
Other languages
Korean (ko)
Other versions
KR20160054071A (en
Inventor
이대우
여인용
양진영
송병섭
이우영
Original Assignee
현대자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020140152519A priority Critical patent/KR101683994B1/en
Publication of KR20160054071A publication Critical patent/KR20160054071A/en
Application granted granted Critical
Publication of KR101683994B1 publication Critical patent/KR101683994B1/en

Links

Images

Classifications

    • 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
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • H02M1/34—Snubber circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • 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
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

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

Abstract

본 발명의 DC/DC 컨버터 회로는 1차측으로 입력된 교류전압을 감압하여 2차측으로 출력하는 변압기; 변압기 2차측의 제1 및 제2 단자에 일단이 각각 연결된 출력 다이오드들; 및 출력 다이오드로부터 발생되는 서지 전압을 낮추도록 변압기 2차측의 제3 단자와 상기 출력 다이오드들의 타단 사이에 연결된 스너버회로;를 포함할 수 있다.The DC / DC converter circuit of the present invention includes: a transformer for reducing an AC voltage inputted to a primary side and outputting the reduced AC voltage to a secondary side; Output diodes whose ends are respectively connected to first and second terminals of the secondary side of the transformer; And a snubber circuit connected between the third terminal of the secondary side of the transformer and the other end of the output diodes so as to lower the surge voltage generated from the output diode.

Description

DC/DC 컨버터 회로 {DC-DC converter circuit}DC / DC converter circuit < RTI ID = 0.0 >

본 발명은 스너버 회로가 적용되는 DC/DC 컨버터 회로에 관한 것이다.
The present invention relates to a DC / DC converter circuit to which a snubber circuit is applied.

세계적인 환경오염 문제의 대두에 따른 친환경차에 대한 관심이 높아진 상황에서 컨버터의 효율과 전자파 문제는 차량 품질과 직결되는 문제가 되었다.With the increasing interest in environmentally friendly vehicles due to global environmental pollution problems, converter efficiency and electromagnetic problems have become a problem directly related to vehicle quality.

종래에는 도 1과 같이 변압기 1차측에 스너버회로(10)를 적용함으로써 스너버용 공진 인덕터와 다이오드를 이용하여 출력 다이오드에서 발생하는 서지성 전압(Surge Voltage) 노이즈를 제거하였다.Conventionally, the snubber circuit 10 is applied to the primary side of the transformer as shown in FIG. 1, thereby removing the surge voltage noise generated in the output diode by using the resonant inductor and diode for the snubber.

하지만, 변압기 1차측에는 전압과 전류가 높게 형성되기 때문에, 변압기 1차측에 적용되는 스너버회로의 부품이 비싸진다는 문제점이 있었다.However, since the primary side of the transformer is formed with a high voltage and current, there is a problem that parts of the snubber circuit applied to the primary side of the transformer are expensive.

상기의 배경기술로서 설명된 사항들은 본 발명의 배경에 대한 이해 증진을 위한 것일 뿐, 이 기술분야에서 통상의 지식을 가진자에게 이미 알려진 종래기술에 해당함을 인정하는 것으로 받아들여져서는 안 될 것이다.
It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KRKR 10-2008-002612510-2008-0026125 AA

본 발명은 이러한 문제점을 해결하기 위하여 제안된 것으로, 변압기 2차측에 스너버회로를 구비하는 DC/DC 컨버터 회로를 제공하는데 그 목적이 있다.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a DC / DC converter circuit having a snubber circuit on the secondary side of a transformer.

상기의 목적을 달성하기 위한 본 발명에 따른 DC/DC 컨버터 회로는 1차측으로 입력된 교류전압을 감압하여 2차측으로 출력하는 변압기; 상기 변압기 2차측의 제1 및 제2 단자에 일단이 각각 연결된 출력 다이오드들; 및 상기 출력 다이오드로부터 발생되는 서지 전압을 낮추도록 상기 변압기 2차측의 제3 단자와 상기 출력 다이오드들의 타단 사이에 연결된 스너버회로;를 포함할 수 있다.According to an aspect of the present invention, there is provided a DC / DC converter circuit comprising: a transformer for reducing an AC voltage inputted to a primary side and outputting the reduced AC voltage to a secondary side; Output diodes whose ends are respectively connected to first and second terminals of the secondary side of the transformer; And a snubber circuit connected between the third terminal of the secondary side of the transformer and the other end of the output diodes so as to lower the surge voltage generated from the output diode.

상기 스너버회로는 제3 단자에 일단이 직렬연결된 콘덴서; 상기 콘덴서의 타단과 상기 출력 다이오드들의 타단 사이에 연결되되, 서로 병렬연결되는 인덕터 및 다이오드를 포함할 수 있다.The snubber circuit includes: a capacitor having one end connected in series to a third terminal; And an inductor and a diode connected between the other end of the capacitor and the other end of the output diodes and connected in parallel with each other.

고전압배터리로부터 입력된 직류전압을 교류전압으로 변환하여 상기 변압기의 1차측에 출력하는 스위칭회로;를 더 포함할 수 있다.And a switching circuit for converting the DC voltage input from the high voltage battery into an AC voltage and outputting the AC voltage to the primary side of the transformer.

상기 스위칭회로는 제1 스위칭소자, 제2 스위칭소자, 제3 스위칭소자 및 제4 스위칭소자를 포함하고, 제어기의 위상제어에 따라 상기 제1 및 제3 스위칭소자가 스위칭되고 제2 및 제4 스위칭소자가 스위칭되는 풀브리지 방식으로 구동될 수 있다.Wherein the switching circuit includes a first switching element, a second switching element, a third switching element, and a fourth switching element, and the first and third switching elements are switched according to the phase control of the controller and the second and fourth switching elements The device can be driven in a full bridge mode in which the device is switched.

상기 스너버회로 양단에 연결되되, 일단은 전장부하를 매개로 연결되어 상기 전장부하로 출력되는 전류의 리플을 감소시키는 출력 인덕터를 더 포함할 수 있다.
And an output inductor connected to both ends of the snubber circuit, one end of which is connected through an electric field load to reduce a ripple of a current output to the electric field load.

상술한 바와 같은 구조로 이루어진 DC/DC 컨버터 회로에 따르면, 스너버회로가 변압기 1차측보다 낮은 전압과 전류가 형성되는 변압기 2차측에 마련되기 때문에 보다 저렴한 가격의 부품이 적용가능하여 DC/DC 컨버터의 원가가 절감될 수 있다.According to the DC / DC converter circuit having the above-described structure, the snubber circuit is provided at the secondary side of the transformer, which is lower in voltage and current than the primary side of the transformer, Can be reduced.

또한, 변압기가 가지는 누설 인덕턴스와 출력 다이오드들에 의해 발생하는 서지성전압을 낮춤으로써 전장부하의 파손이나 역기전력 발생을 막아 안전성을 향상시킬 수 있다.
In addition, by lowering the leakage inductance of the transformer and the surge voltage generated by the output diodes, it is possible to improve the safety by preventing the damage of the electric field load or the generation of the back electromotive force.

도 1은 종래기술의 일 실시예에 따른 DC/DC 컨버터 회로를 도시한 회로이다.
도 2는 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로를 도시한 회로이다.
도 3은 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로에서 스너버회로를 제거했을 경우의 전압변화를 도시한 그래프이다.
도 4는 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로에 스너버회로를 적용했을 경우의 전압변화를 도시한 그래프이다.1 is a circuit diagram showing a DC / DC converter circuit according to an embodiment of the prior art.
2 is a circuit diagram showing a DC / DC converter circuit according to an embodiment of the present invention.
3 is a graph illustrating a voltage change when the snubber circuit is removed from the DC / DC converter circuit according to an embodiment of the present invention.
4 is a graph illustrating a voltage change when a snubber circuit is applied to a DC / DC converter circuit according to an embodiment of the present invention.

이하에서는 첨부된 도면을 참조하여 본 발명의 바람직한 실시 예에 따른 DC/DC 컨버터 회로에 대하여 살펴본다. 도 2는 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로를 도시한 회로이고,도 3은 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로에서 스너버회로를 제거했을 경우의 전압변화를 도시한 그래프이며, 도 4는 본 발명의 일 실시예에 따른 DC/DC 컨버터 회로에 스너버회로를 적용했을 경우의 전압변화를 도시한 그래프이다. Hereinafter, a DC / DC converter circuit according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 2 is a circuit diagram showing a DC / DC converter circuit according to an embodiment of the present invention. FIG. 3 is a circuit diagram illustrating a voltage change when the snubber circuit is removed in the DC / DC converter circuit according to an embodiment of the present invention. FIG. 4 is a graph illustrating a voltage change when a snubber circuit is applied to a DC / DC converter circuit according to an embodiment of the present invention. Referring to FIG.

도 2를 참조하면, DC/DC 컨버터 회로는 1차측으로 입력된 교류전압을 감압하여 2차측으로 출력하는 변압기(110); 상기 변압기(110) 2차측의 제1 및 제2 단자(113,115)에 일단이 각각 연결된 출력 다이오드들(120); 및 상기 출력 다이오드(120)로부터 발생되는 서지 전압을 낮추도록 상기 변압기(110) 2차측의 제3 단자(117)와 상기 출력 다이오드들(120)의 타단 사이에 연결된 스너버회로(130);를 포함할 수 있다.Referring to FIG. 2, the DC / DC converter circuit includes a transformer 110 for reducing an AC voltage inputted to a primary side and outputting the reduced AC voltage to a secondary side; Output diodes 120 each having one end connected to the first and second terminals 113 and 115 of the secondary side of the transformer 110; And a snubber circuit (130) connected between the third terminal (117) of the secondary side of the transformer (110) and the other end of the output diodes (120) so as to lower the surge voltage generated from the output diode .

본 발명의 변압기(110)는 감압한 전압을 2차측으로 출력하되, 3개의 단자로 분기되어 출력되도록 마련된다. 특히, 변압기(110)는 변압과정 중 제3 단자(117)로는 계속 전압이 출력되되, 제1 단자(113)와 제2 단자(115)는 서로 교번하여 전압이 출력되도록 마련될 수 있다.The transformer 110 of the present invention outputs the reduced voltage to the secondary side and is branched to three terminals and is output. Particularly, in the transformer 110, the voltage is continuously outputted to the third terminal 117 during the transforming process, and the first terminal 113 and the second terminal 115 may be alternated to output the voltage.

변압기(110) 내부에는 기생하는 누설 인덕턴스(111)가 포함된다. 만약, 출력 다이오드(120)가 오프(OFF)될 경우, 누설 인덕턴스(111)에 의해 변압기의 제1 및 제2 단자(113,115)에 높은 서지(Surge) 전압이 발생할 수 있다. 이때 서지 전압은 고주파, 고전압의 특성을 가지는 전압을 말한다. 이러한 서지 전압이 변압기(110)를 통해 출력 다이오드들(120)에 전달되면 출력 다이오드(120)의 수명이 짧아지고 전장부하(170)에 손상이 가해질 수 있기 때문에 서지 전압의 고주파, 고전압 특성을 낮출 필요가 있게 되었다. 도 3은 본 발명에서 스너버회로(130)를 적용하지 않았을 경우, 서지 전압으로 인한 노이즈 파형을 확인할 수 있다.
A parasitic leakage inductance 111 is included in the transformer 110. If the output diode 120 is turned off, a high surge voltage may be generated in the first and second terminals 113 and 115 of the transformer by the leakage inductance 111. In this case, the surge voltage refers to a voltage having characteristics of high frequency and high voltage. When the surge voltage is transmitted to the output diodes 120 through the transformer 110, the lifetime of the output diode 120 may be shortened and the electrical load 170 may be damaged, so that the high frequency and high voltage characteristics of the surge voltage may be lowered It became necessary. FIG. 3 is a graph showing a noise waveform due to a surge voltage when the snubber circuit 130 is not used in the present invention.

이러한 문제점을 해결하기 위하여 본 발명은 변압기(110)에 2차측 제3 단자(117)와 출력 다이오드들(120) 사이에 스너버회로(130)를 추가하는데, 스너버회로(130)는 제3 단자(117)에 일단이 직렬연결된 콘덴서(131); 상기 콘덴서(131)의 타단과 상기 출력 다이오드들(120)의 타단 사이에 연결되되, 서로 병렬연결되는 인덕터(133) 및 다이오드(135)를 포함할 수 있다.In order to solve such a problem, the present invention adds a snubber circuit 130 between the secondary side third terminal 117 and the output diodes 120 to the transformer 110, A capacitor 131 whose one end is connected in series to the terminal 117; And an inductor 133 and a diode 135 connected between the other end of the capacitor 131 and the other end of the output diodes 120 and connected in parallel with each other.

즉, 스너버회로(130)에 포함된 콘덴서(131)와 인덕터(133)의 공진에 의해 출력 다이오드(120)에 발생하는 서지 전압의 주파수와 전압이 감소하게 된다. 즉, 도 4와 같이 스너버회로(130)를 적용하였을 경우, 서지 전압으로 인한 전압 피크치가 감소하고 이후 노이즈 파형이 잦아드는 것을 확인할 수 있다. 이를 통해, 출력 다이오드(120)가 오프(OFF)될 시 발생하는 서지 전압을 감소시켜 출력 다이오드(120)의 수명을 연장시킬 수 있다.That is, the resonance between the capacitor 131 and the inductor 133 included in the snubber circuit 130 reduces the frequency and voltage of the surge voltage generated in the output diode 120. That is, when the snubber circuit 130 is applied as shown in FIG. 4, it can be seen that the voltage peak due to the surge voltage decreases and then the noise waveform decreases. As a result, the surge voltage generated when the output diode 120 is turned off can be reduced to prolong the life of the output diode 120.

이때, 스너버회로(130)의 콘덴서(131)와 인덕터(133)는 변압기(110) 2차측에 마련되기 때문에 고전압 부품을 적용하지 않아도 된다.
At this time, since the capacitor 131 and the inductor 133 of the snubber circuit 130 are provided on the secondary side of the transformer 110, a high-voltage component may not be applied.

한편, DC/DC 컨버터 회로는 고전압 배터리(150)로부터 입력된 직류전압을 교류전압으로 변환하여 상기 변압기(110)의 1차측에 출력하는 스위칭회로(140)와 스너버회로(130) 양단에 연결되되, 일단은 전장부하(170)를 매개로 연결되어 상기 전장부하(170)로 출력되는 전류의 리플을 감소시키는 출력 인덕터(160)를 더 포함할 수 있다. The DC / DC converter circuit includes a switching circuit 140 for converting a DC voltage input from the high voltage battery 150 into an AC voltage and outputting the AC voltage to the primary side of the transformer 110, and a switching circuit 140 connected to both ends of the snubber circuit 130 The output inductor 160 may include an output inductor 160 connected to one end through an electric field load 170 to reduce a ripple of a current output to the electric field load 170.

요약하자면, DC/DC 컨버터 회로는 고전압 배터리(150)로부터 입력된 직류전압을 스위칭회로(140)를 통해 교류전압으로 변환하여 변압기(110) 1차측에 출력한 후, 변압기(110)를 통해 입력된 높은 교류전압을 낮은 교류전압으로 출력한다. 변압기(110)로부터 출력된 교류전압을 출력 다이오드(120)를 이용하여 직류전압으로 변환하고 출력 인덕터(160)를 이용하여 전류의 리플을 감소시킨다. 이때, 출력 다이오드(120)에 발생하는 서지 전압을 변압기(110) 2차측에 마련된 스너버 회로(130)의 인덕터(131)와 콘덴서(133)를 이용하여 감소시키도록 구성된다. 이에 따라 종래에 변압기(110) 1차측에 마련되던 고전압, 고전류용 스너버 회로를 구성하지 않아도 되어 가격이 절감될 수 있다.In summary, the DC / DC converter circuit converts the DC voltage input from the high voltage battery 150 into an AC voltage through the switching circuit 140, outputs the AC voltage to the primary side of the transformer 110, And outputs a high AC voltage with a low AC voltage. The AC voltage output from the transformer 110 is converted to a DC voltage using the output diode 120 and the ripple of the current is reduced using the output inductor 160. At this time, the surge voltage generated in the output diode 120 is reduced by using the inductor 131 and the capacitor 133 of the snubber circuit 130 provided at the secondary side of the transformer 110. Accordingly, it is not necessary to construct a snubber circuit for a high voltage and high current, which is conventionally provided on the primary side of the transformer 110, so that the cost can be reduced.

스위칭회로(140)는 제1 스위칭소자(141), 제2 스위칭소자(143), 제3 스위칭소자(145) 및 제4 스위칭소자(147)를 포함하고, 제어기(미도시)의 위상제어에 따라 상기 제1 및 제3 스위칭소자(141,145)가 스위칭되고 제2 및 제4 스위칭소자(143,147)가 스위칭되는 풀브리지 방식으로 구동될 수 있다.
The switching circuit 140 includes a first switching device 141, a second switching device 143, a third switching device 145 and a fourth switching device 147 and is connected to the phase control of the controller (not shown) The first and third switching devices 141 and 145 are switched and the second and fourth switching devices 143 and 147 are switched.

상술한 바와 같은 구조로 이루어진 DC/DC 컨버터 회로에 따르면, 스너버회로(130)가 변압기(110) 1차측보다 낮은 전압과 전류가 형성되는 변압기(110) 2차측에 마련되기 때문에 보다 저렴한 가격의 부품이 적용가능하여 DC/DC 컨버터의 원가가 절감될 수 있다.According to the DC / DC converter circuit having the above-described structure, since the snubber circuit 130 is provided on the secondary side of the transformer 110 in which voltage and current are formed lower than the primary side of the transformer 110, The cost of the DC / DC converter can be reduced because the parts are applicable.

또한, 변압기(110)가 가지는 누설 인덕턴스(111)와 출력 다이오드(120)들에 의해 발생하는 서지성전압을 낮춤으로써 전장부하(170)의 파손이나 역기전력 발생을 막아 안전성을 향상시킬 수 있다.
In addition, by reducing the surge voltage generated by the leakage inductance 111 and the output diodes 120 of the transformer 110, it is possible to prevent breakage of the electric field load 170 and generation of counter-electromotive force, thereby improving safety.

본 발명은 특정한 실시예에 관련하여 도시하고 설명하였지만, 이하의 특허청구범위에 의해 제공되는 본 발명의 기술적 사상을 벗어나지 않는 한도 내에서, 본 발명이 다양하게 개량 및 변화될 수 있다는 것은 당 업계에서 통상의 지식을 가진 자에게 있어서 자명할 것이다.
While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

100: 변압기 111: 누설 인덕턴스
113: 제1 단자 115: 제2 단자
117: 제3 단자 120: 출력 다이오드
130: 스너버 회로 131: 콘덴서
133: 인덕터 135: 다이오드
140: 스위칭회로 150: 고전압배터리
160: 출력 인덕터 170: 전장부하100: Transformer 111: Leakage inductance
113: first terminal 115: second terminal
117: third terminal 120: output diode
130: Snubber circuit 131: Capacitor
133: Inductor 135: Diode
140: Switching circuit 150: High voltage battery
160: Output inductor 170: Electric field load

Claims (5)

1차측으로 입력된 교류전압을 감압하여 2차측으로 출력하는 변압기;
상기 변압기 2차측의 제1 및 제2 단자에 일단이 각각 연결된 출력 다이오드들; 및
상기 출력 다이오드로부터 발생되는 서지 전압을 낮추도록 상기 변압기 2차측의 제3 단자와 상기 출력 다이오드들의 타단 사이에 연결된 스너버회로;를 포함하고,
상기 스너버회로는 제3 단자에 일단이 연결된 하나의 콘덴서; 및
상기 콘덴서의 타단과 상기 출력 다이오드들의 타단 사이에 연결되되, 서로 병렬연결되는 하나의 인덕터와 하나의 다이오드로 구성되는,
DC/DC 컨버터 회로.A transformer for reducing the AC voltage inputted to the primary side and outputting the reduced AC voltage to the secondary side;
Output diodes whose ends are respectively connected to first and second terminals of the secondary side of the transformer; And
And a snubber circuit connected between the third terminal of the secondary side of the transformer and the other end of the output diodes so as to lower the surge voltage generated from the output diode,
The snubber circuit includes: a capacitor having one end connected to the third terminal; And
And a diode connected between the other end of the capacitor and the other end of the output diodes and connected in parallel to each other,
DC / DC converter circuit. 삭제delete 제1항에 있어서,
고전압배터리로부터 입력된 직류전압을 교류전압으로 변환하여 상기 변압기의 1차측에 출력하는 스위칭회로;를 더 포함하는,
DC/DC 컨버터 회로.The method according to claim 1,
And a switching circuit for converting the DC voltage input from the high voltage battery into an AC voltage and outputting the AC voltage to the primary side of the transformer,
DC / DC converter circuit. 제3항에 있어서,
상기 스위칭회로는 제1 스위칭소자, 제2 스위칭소자, 제3 스위칭소자 및 제4 스위칭소자를 포함하고, 제어기의 위상제어에 따라 상기 제1 및 제3 스위칭소자가 스위칭되고 제2 및 제4 스위칭소자가 스위칭되는 풀브리지 방식으로 구동되는,
DC/DC 컨버터 회로.The method of claim 3,
Wherein the switching circuit includes a first switching element, a second switching element, a third switching element, and a fourth switching element, and the first and third switching elements are switched according to the phase control of the controller and the second and fourth switching elements The device is driven in a full bridge mode,
DC / DC converter circuit. 제1항에 있어서,
상기 스너버회로 양단에 연결되되, 일단은 전장부하를 매개로 연결되어 상기 전장부하로 출력되는 전류의 리플을 감소시키는 출력 인덕터를 더 포함하는,
DC/DC 컨버터 회로.The method according to claim 1,
Further comprising an output inductor connected to both ends of the snubber circuit, the output inductor being connected at one end through an electric field load to reduce ripple of current output to the electric field load,
DC / DC converter circuit.
KR1020140152519A 2014-11-05 2014-11-05 DC-DC converter circuit KR101683994B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140152519A KR101683994B1 (en) 2014-11-05 2014-11-05 DC-DC converter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140152519A KR101683994B1 (en) 2014-11-05 2014-11-05 DC-DC converter circuit

Publications (2)

Publication Number Publication Date
KR20160054071A KR20160054071A (en) 2016-05-16
KR101683994B1 true KR101683994B1 (en) 2016-12-08

Family

ID=56108879

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140152519A KR101683994B1 (en) 2014-11-05 2014-11-05 DC-DC converter circuit

Country Status (1)

Country Link
KR (1) KR101683994B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008172894A (en) 2007-01-10 2008-07-24 Sony Corp Switching power supply circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1202440B1 (en) * 2000-10-17 2006-12-20 Omron Corporation Snubber circuit and power converter using the same
CN101248575A (en) 2005-06-29 2008-08-20 株式会社村田制作所 DC-DC converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008172894A (en) 2007-01-10 2008-07-24 Sony Corp Switching power supply circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Sam Ben-Yaakov et al., PASSIVE LOSSLESS SNUBBERS FOR HIGH FREQUENCY PWM CONVERTERS, IEEE PESC Conference 1999 논문(1999.03)*

Also Published As

Publication number Publication date
KR20160054071A (en) 2016-05-16

Similar Documents

Publication Publication Date Title
JP5995139B2 (en) Bidirectional DC / DC converter
US9570991B2 (en) Bidirectional DC/DC converter
US9025345B2 (en) Power supply apparatus
KR101218953B1 (en) System interconnection inverter
US9019736B2 (en) DC-to-AC power conversion system and method of operating the same
JP6706811B2 (en) Snubber circuit and power conversion system using the same
JP2016019463A (en) Pulse width modulation resonant converter, and vehicle charger utilizing the same
JP2012186872A (en) Dc power supply apparatus
US20070115697A1 (en) Method of controlling DC-to-DC converter whereby switching control sequence applied to switching elements suppresses voltage surges at timings of switch-off of switching elements
JP2014180110A (en) DC-DC converter
JPWO2014155604A1 (en) DC / DC converter
RU2012119257A (en) INVERTER GENERATOR
EP2814165B1 (en) DC Power Supply
JP2019083658A (en) Power converter
CN102891606B (en) Switching power supply
KR101734641B1 (en) Charging device of vehicle
JP6709965B2 (en) Snubber circuit and power conversion system using the same
KR102211454B1 (en) Isolated DC-DC converter and driving method thereof
KR101683994B1 (en) DC-DC converter circuit
KR101558770B1 (en) Charging device of vehicle
CN110447163B (en) Power conversion device
JP2012210028A (en) Switching power supply device
JP4635584B2 (en) Switching power supply
JP6503269B2 (en) Gate drive circuit
TWI568163B (en) Isolated converter and isolated converter? control method

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20191127

Year of fee payment: 4