KR102325394B1 - Multi-Functional Multi-Ratio OBC/LDC Integrated circuit - Google Patents

Multi-Functional Multi-Ratio OBC/LDC Integrated circuit Download PDF

Info

Publication number
KR102325394B1
KR102325394B1 KR1020190150545A KR20190150545A KR102325394B1 KR 102325394 B1 KR102325394 B1 KR 102325394B1 KR 1020190150545 A KR1020190150545 A KR 1020190150545A KR 20190150545 A KR20190150545 A KR 20190150545A KR 102325394 B1 KR102325394 B1 KR 102325394B1
Authority
KR
South Korea
Prior art keywords
turns ratio
ldc
selection switch
switching unit
transformer
Prior art date
Application number
KR1020190150545A
Other languages
Korean (ko)
Other versions
KR20210062781A (en
Inventor
박정욱
김이삭
Original Assignee
연세대학교 산학협력단
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 연세대학교 산학협력단 filed Critical 연세대학교 산학협력단
Priority to KR1020190150545A priority Critical patent/KR102325394B1/en
Publication of KR20210062781A publication Critical patent/KR20210062781A/en
Application granted granted Critical
Publication of KR102325394B1 publication Critical patent/KR102325394B1/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/19—Switching between serial connection and parallel connection of battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • 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
    • H02M3/33569—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 having several active switching elements
    • H02M3/33576—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33592—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 having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal 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
    • H02M7/219—Conversion of ac power input into dc power output without possibility of reversal 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 in a bridge configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/10—DC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/52—Drive Train control parameters related to converters
    • B60L2240/527—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/547—Voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/90—Vehicles comprising electric prime movers
    • B60Y2200/91—Electric vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

Abstract

본 발명은 전기자동차 배터리 충전 시스템에서 높은 전력밀도를 갖고 추가적인 제어없이 넓은 전압범위의 양방향 동작이 가능하도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로에 관한 것으로, 선택적으로 권선비를 사용하는 것에 의해 추가적인 제어 없이 넓은 전압범위에서 양방향 G2V 와 V2G 기능을 모두 수행하고, LDC 기능에서 적은 스위치만을 사용하여 동작하는 것에 의해 충전 효율을 높일 수 있도록 한 것이다.The present invention relates to an OBC/LDC integrated circuit having a high power density and a multi-function and turns ratio enabling bidirectional operation of a wide voltage range without additional control in an electric vehicle battery charging system. It performs both G2V and V2G functions in a wide voltage range without additional control and improves charging efficiency by operating using only a small number of switches in the LDC function.

Description

멀티 기능과 권선비를 갖는 ＯＢＣ/ＬＤＣ 통합형 회로{Multi-Functional Multi-Ratio ＯＢＣ/ＬＤＣ Integrated circuit}Multi-Functional Multi-Ratio OBC/LDDC Integrated circuit with multi-function and turns ratio

본 발명은 전기자동차 배터리 충전 시스템에 관한 것으로, 구체적으로 높은 전력밀도를 갖고 추가적인 제어없이 넓은 전압범위의 양방향 동작이 가능하도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로에 관한 것이다.The present invention relates to an electric vehicle battery charging system, and more particularly, to an OBC/LDC integrated circuit having a high power density and a multi-function and turns ratio enabling bidirectional operation of a wide voltage range without additional control.

전기자동차는 기존의 화석연료가 아니라 전기에너지를 이용하는 자동차로서 최근 화석연료의 고갈 및 친환경자동차 개발경향에 부응하여 관련기술들이 빠르게 발전하고 있다.Electric vehicles are vehicles that use electric energy rather than fossil fuels, and related technologies are rapidly developing in response to the recent depletion of fossil fuels and the development of eco-friendly vehicles.

전기자동차에서는 에너지원으로 전기를 사용하기 때문에 전기를 에너지원으로 저장하여 보관하여야 하는데 이를 위해 일반 상용전원을 통하여 배터리를 충전하여야 한다.Since electric vehicles use electricity as an energy source, electricity must be stored and stored as an energy source.

이때 고전압인 상용전원을 이용하여 전기차의 에너지저장장치인 배터리를 충전하는데 사용되는 회로가 전기자동차용 충전회로인 OBC(On-Board Charger) 회로이다.At this time, the circuit used to charge the battery, which is the energy storage device of the electric vehicle, using the high voltage commercial power is the OBC (On-Board Charger) circuit, which is the charging circuit for the electric vehicle.

도 1a와 도 1b는 일반적인 OBC 구성 블록도 및 회로 구성도이다.1A and 1B are a block diagram and a circuit diagram of a general OBC configuration.

OBC 회로는 PFC(Power Factor Corrector)(10),DC/DC(11),HVB(12)의 구조를 갖는다.The OBC circuit has a structure of a Power Factor Corrector (PFC) 10 , DC/DC 11 , and HVB 12 .

OBC 회로는 완속충전회로 또는 차량 탑재형 배터리충전기로도 불리며, OBC 회로에서는 교류인 상용전원을 직류로 변환하여 배터리에 충전하여 이때 배터리에 충전되는 전압은 전기자동차를 구동하기 위한 모터에 공급되는 고전압의 직류이다.The OBC circuit is also called a slow charging circuit or a vehicle-mounted battery charger. In the OBC circuit, commercial power, which is alternating current, is converted into direct current and charged to the battery. is the direct current of

도 2a와 도 2b는 일반적인 LDC 구성 블록도 및 회로 구성도이다.2A and 2B are a general LDC configuration block diagram and a circuit configuration diagram.

LDC 회로는 HVB(20),DC/DC(21),LVB(22)의 구조를 갖는다.The LDC circuit has a structure of HVB (20), DC/DC (21), and LVB (22).

전력변환회로인 LDC(Low voltage DC-DC Converter) 회로는 보조배터리 충전기로 사용되는 것으로, 고전압을 저전압으로 변환하여 주는 회로로서 OBC 회로에서 출력되어 모터구동에 사용되는 고전압의 직류를 저전압인 12V 또는 24V로 변환하여 차량의 전장 부품들에서 사용하는 12V 또는 24V의 저전압을 공급한다.The LDC (Low voltage DC-DC Converter) circuit, which is a power conversion circuit, is used as an auxiliary battery charger and is a circuit that converts high voltage to low voltage. It converts to 24V and supplies a low voltage of 12V or 24V used in the vehicle's electronic components.

이와 같이 차량 탑재형 배터리충전기(On Board Charger;OBC)는 그리드로부터의 전력을 역률 보상 회로를 통해 역률을 상승시킨 후, 이 회로의 출력전압을 DC/DC 컨버터를 통해 고전압 배터리에 맞게 변환하며 동작한다.As described above, the on-board battery charger (OBC) increases the power factor through the power factor correction circuit by increasing the power from the grid, and then converts the output voltage of this circuit to match the high voltage battery through the DC/DC converter. do.

보조배터리 충전기(LDC)는 고전압 배터리의 높은 전압을 DC/DC 컨버터를 통해 보조배터리의 낮은 전압으로 강압을 시키며 동작한다.The auxiliary battery charger (LDC) operates by stepping down the high voltage of the high voltage battery to the low voltage of the auxiliary battery through a DC/DC converter.

종래 기술에서 주로 사용되는 배터리 충전 시스템의 경우는 OBC를 통해 고전압 배터리를 충전하고, 고전압 배터리를 입력으로 하여 LDC를 통해 보조배터리를 충전한다.In the case of a battery charging system mainly used in the prior art, the high voltage battery is charged through the OBC, and the auxiliary battery is charged through the LDC with the high voltage battery as an input.

즉, 두 개의 회로가 배터리 충전 시스템을 구성한다.That is, the two circuits constitute the battery charging system.

이러한 방식은 스위치와 소자의 개수를 증가시켜 충전시스템의 부피가 커지게 된다.In this way, the number of switches and elements increases, thereby increasing the volume of the charging system.

이러한 문제를 해결하기위해 OBC와 LDC를 통합한 통합형 회로를 사용하는 방식이 있으나 LDC 로 동작할 때의 효율이 낮고 넓은 전압범위에서 양방향으로 동작하기 위해선 추가적인 제어가 필요하다는 단점이 있다. To solve this problem, there is a method of using an integrated circuit that integrates OBC and LDC, but the efficiency when operating as an LDC is low and additional control is required to operate in both directions in a wide voltage range.

도 3은 종래 기술의 OBC/LDC 통합형 회로 구성도이다.3 is a block diagram of an OBC/LDC integrated circuit of the prior art.

종래 기술의 OBC/LDC 통합형 회로를 갖는 배터리 충전 시스템의 경우 선택형 모드에 따라 스위치 M이 동작하고 (G2V, V2G 기능에선 b에 연결, LDC 기능에선 a에 연결), 각 모드 안에서의 S 1 ~ S 12의 스위칭 동작으로 여러 기능을 수행한다. In the case of a battery charging system having an OBC/LDC integrated circuit of the prior art, switch M operates according to the selectable mode (connected to b for G2V, V2G function, connected to a for LDC function), and S 1 to S in each mode 12 switching operations to perform multiple functions.

OBC/LDC 통합형 회로 같은 경우는 그리드로부터 고전압 배터리를 충전하는 Grid to Vehicle(G2V) 기능과 고전압 배터리로부터 그리드로 전력을 전송하는 Vehicle to Grid(V2G) 기능, 그리고 고전압 배터리로부터 저전압 배터리를 충전하는 Low Voltage DC/DC Converter (LDC) 기능을 하나의 회로로 수행한다. In the case of the OBC/LDC integrated circuit, the Grid to Vehicle (G2V) function that charges the high voltage battery from the grid, the Vehicle to Grid (V2G) function that transmits power from the high voltage battery to the grid, and the Low voltage battery that charges the low voltage battery from the high voltage battery Voltage DC/DC Converter (LDC) functions as one circuit.

이와 같은 종래 기술의 통합형 회로는 OBC와 LDC가 분리된 회로에 비해 LDC 부분을 추가하지 않고, 기존 OBC 회로 만으로 LDC 기능까지 수행하기 때문에 스위치와 소자수가 줄어든다는 장점이 있다.Compared to the circuit in which the OBC and the LDC are separated, the integrated circuit of the prior art does not add an LDC part and performs the LDC function only with the existing OBC circuit, so that the number of switches and elements is reduced.

그러나 LDC로 동작할 때 12개의 스위치를 모두 동작하기 때문에 효율이 낮고, 기존의 OBC의 단점인 고정된 턴수비에 의해 추가적인 제어가 없이는 넓은 전압범위에서 G2V 와 V2G 양방향 동작이 어렵다는 단점이 존재한다. However, when operating as an LDC, the efficiency is low because all 12 switches are operated, and it is difficult to operate both G2V and V2G in a wide voltage range without additional control due to the fixed turn ratio, which is a disadvantage of the existing OBC.

즉, 종래 기술의 OBC/LDC 통합형 회로는 Function Ⅰ : G2V(Grid to Vehicle), Function Ⅱ : V2G(Vehicle to Grid) 동작에서 고정된 트랜스 권선비에 의해 승압/강압 동작에 한계가 있어 저효율/고복잡도의 문제가 있다.That is, the OBC/LDC integrated circuit of the prior art has a limit in step-up/step-down operation due to a fixed transformer turns ratio in Function I: G2V (Grid to Vehicle), Function II: V2G (Vehicle to Grid) operation. There is a problem of

G2V(Grid to Vehicle), V2G(Vehicle to Grid) 동작에서 다음과 같은 특성이 요구되고 있다.The following characteristics are required in G2V (Grid to Vehicle) and V2G (Vehicle to Grid) operation.

Ⅰ. G2V 기능에서의 넓은 출력전압 범위I. Wide output voltage range in G2V function

Ⅱ. V2G 기능에서의 넓은 입력전압 범위에서 Vdc = 350 V로 제어II. Controlled by Vdc = 350 V over a wide input voltage range in V2G function

이와 같이 요구되는 특성을 모두 달성하기 위해선 추가적인 제어가 필요하다.Additional control is required to achieve all of these required characteristics.

① G2V기능에서 넓은 출력전압 범위 보장하기 위해 420/380 보다 높은 턴 수비 설정이 필요하고, V2G 기능에서 목표달성 위해 낮은 HVB 전압에서 S5 ~ S8 는 부스트 컨버터 동작하도록 제어(Boost Control)① In the G2V function, a higher turn defense setting than 420/380 is required to ensure a wide output voltage range, and S 5 to S 8 are controlled to operate as a boost converter at a low HVB voltage to achieve the target in the V2G function (Boost Control)

② V2G 기능에서의 넓은 입력전압범위에서 Vdc = 350 V로 제어하기 위해 300/350 보다 낮은 턴수비 설정이 필요하고, G2V 기능에서 넓은 출력전압범위를 보장하기 위해 출력전압에 따라 DC 링크 전압을 변경시키는 제어(Variable DC Link Voltage Control)가 필요하다.② In the V2G function, a lower turn ratio setting than 300/350 is required to control Vdc = 350 V in the wide input voltage range, and the DC link voltage is changed according to the output voltage to ensure a wide output voltage range in the G2V function. Variable DC Link Voltage Control is required.

그리고 Function Ⅲ : LDC(Low Voltage DC/DC Converter)을 위해서는 12개 스위치 모두 사용하여야 하고, 모든 스위치에서 손실 발생한다.And for Function Ⅲ: LDC (Low Voltage DC/DC Converter), all 12 switches must be used, and loss occurs in all switches.

그리고 Front-end 컨버터에서의 하드 스위칭, 고주파 스위치 사용(G2V에서 높은 효율 위해), 높은 도통손실에 의해 Front-end 컨버터에서의 높은 손실 발생 문제가 있다.In addition, there is a problem of high loss in the front-end converter due to hard switching in the front-end converter, the use of a high-frequency switch (for high efficiency in G2V), and high conduction loss.

따라서, 충전 시스템의 크기를 줄여 전력밀도를 높이고, 하나의 회로로 고전압 배터리와 저전압 보조 배터리를 충전시킬 수 있로고 하는 새로운 기술의 충전 시스템에 관한 기술의 개발이 요구되고 있다.Accordingly, there is a demand for the development of a new charging system technology capable of increasing the power density by reducing the size of the charging system and charging a high voltage battery and a low voltage auxiliary battery with a single circuit.

대한민국 등록특허 제10-1903121호Republic of Korea Patent Registration No. 10-1903121 대한민국 등록특허 제10-1959922호Republic of Korea Patent Registration No. 10-1959922

본 발명은 종래 기술의 전기자동차 배터리 충전 시스템의 문제점을 해결하기 위한 것으로, 높은 전력밀도를 갖고 추가적인 제어없이 넓은 전압범위의 양방향 동작이 가능하도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로를 제공하는데 그 목적이 있다.The present invention is to solve the problems of the electric vehicle battery charging system of the prior art, and provides an OBC/LDC integrated circuit having a high power density and a multi-function and turns ratio enabling bidirectional operation of a wide voltage range without additional control. but it has a purpose.

본 발명은 OBC와 LDC를 통합하여 하나의 회로로 고전압 배터리와 저전압 보조 배터리를 충전시키는 것에 의해 충전 시스템의 크기를 줄여 전력밀도를 높이고 효율적인 전기자동차 배터리 충전 및 관리가 가능하도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로를 제공하는데 그 목적이 있다.The present invention integrates OBC and LDC to charge a high-voltage battery and a low-voltage auxiliary battery in one circuit, thereby reducing the size of the charging system to increase power density and to provide multi-functions and turns ratio that enable efficient charging and management of electric vehicle batteries. An object of the present invention is to provide an OBC/LDC integrated circuit with

본 발명은 OBC/LDC 통합형 회로를 구성하여 추가적인 DC/DC 컨버터가 없이 OBC의 회로만으로 LDC 기능까지 수행할 수 있도록 하여 회로의 복잡도 및 손실을 줄일 수 있도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로를 제공하는데 그 목적이 있다.The present invention is an OBC/LDC integrated type having multi-functions and turns ratio that reduces circuit complexity and loss by configuring an OBC/LDC integrated circuit so that the LDC function can be performed only with the OBC circuit without an additional DC/DC converter. The purpose is to provide a circuit.

본 발명은 선택적으로 권선비를 사용하는 것에 의해 추가적인 제어 없이 넓은 전압범위에서 양방향 G2V 와 V2G 기능을 모두 수행하고, LDC 기능에서 적은 스위치만을 사용하여 동작하는 것에 의해 충전 효율을 높일 수 있도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로를 제공하는데 그 목적이 있다.The present invention selectively uses a turns ratio to perform both the bidirectional G2V and V2G functions in a wide voltage range without additional control, and a multi-function and It is an object to provide an OBC/LDC integrated circuit having a turns ratio.

본 발명은 OBC의 두가지 G2V와 V2G 기능에서 추가적인 제어없이 단순 동기정류기 역할만으로 넓은 전압범위의 양방향 동작이 가능하고, LDC 기능에서 6개의 스위치만의 동작으로 인한 높은 효율을 갖도록 한 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로를 제공하는데 그 목적이 있다.The present invention enables bidirectional operation of a wide voltage range with only the role of a simple synchronous rectifier without additional control in the two G2V and V2G functions of OBC, and provides multi-functions and turns ratio that have high efficiency due to the operation of only 6 switches in the LDC function. An object of the present invention is to provide an OBC/LDC integrated circuit with

본 발명의 다른 목적들은 이상에서 언급한 목적으로 제한되지 않으며, 언급되지 않은 또 다른 목적들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.Other objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

상기와 같은 목적을 달성하기 위한 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 풀 브릿지 회로를 구성하는 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)를 갖고 제 1,2 인덕터(L1)(L2)를 통하여 계통에 연결되는 제 1 스위칭부;제 2 스위칭부 또는 DC 링크 커패시터와 병렬 연결되는 저전압 배터리(LVB);제 1 스위칭부의 일단(a) 또는 저전압 배터리(LVB)의 일단(b)에 선택적으로 연결하기 위한 스위칭을 하는 모드선택 스위치(M);저전압 배터리(LVB)에 병렬 연결되는 DC 링크 커패시터(Cdc) 및 서로 직렬 연결되어 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 1,2 커패시터(C1)(C2);하프 브릿지 회로를 구성하는 제 5,6 스위치 소자(S5)(S6)를 갖고 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 2 스위칭부;하프 브릿지 회로를 구성하는 제 7,8 스위치 소자(S7)(S8)를 갖고 제 2 스위칭부에 병렬 연결되는 제 3 스위칭부;권선비 선택 스위치(M1)(M2)(M3)의 스위칭 동작에 의해 서로 다른 권선비를 갖고 변압 동작을 수행하는 변압 회로부;제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)를 갖고 제 2,3 스위칭부에 대응하여 변압 회로부에 연결되어 DC-DC 컨버터를 구성하는 제 4 스위칭부; 및 제 4 스위칭부에 병렬 연결되는 고전압 배터리(HVB);를 포함하는 것을 특징으로 한다.The OBC/LDC integrated circuit having a multi-function and turns ratio according to the present invention for achieving the above object is the first , second , third, and fourth switch elements (S 1 ) (S 2 ) (S) constituting the full-bridge circuit 3 ) (S 4 ) and having the first and second inductors (L 1 ) (L 2 ) a first switching unit connected to the grid; a second switching unit or a low voltage battery (LVB) connected in parallel with the DC link capacitor; A mode selection switch (M) for selectively connecting one end (a) of the first switching unit or one end (b) of the low voltage battery (LVB); a DC link capacitor (C dc) connected in parallel to the low voltage battery (LVB) ) and the first and second capacitors (C 1 ) (C 2 ) connected in series to each other and connected in parallel to the DC link capacitor (C dc ); fifth and sixth switch elements constituting the half-bridge circuit (S 5 ) (S 6 ) ) and a second switching unit connected in parallel to the DC link capacitor (C dc ); The seventh and eighth switch elements constituting the half-bridge circuit (S 7 ) (S 8 ) and having a second switching unit connected in parallel 3 switching unit; Transformer circuit unit for performing a transformation operation with a different turns ratio by the switching operation of the turns ratio selection switch (M 1 ) (M 2 ) (M 3 ); 9th, 10th, 11th, and 12th switch elements (S 9 ) ) (S 10 ) (S 11 ) (S 12 ) having a fourth switching unit connected to the transformer circuit unit corresponding to the second and third switching units to configure a DC-DC converter; and a high voltage battery (HVB) connected in parallel to the fourth switching unit.

여기서, 권선비 선택 스위치(M1)은 제 2 스위칭부를 구성하는 제 5 스위치 소자(S5)와 제 6 스위치 소자(S6)의 공통 출력단과 변압 회로부의 제 1 권선비 단자 사이에 위치하고, 권선비 선택 스위치(M2)는 서로 직렬 연결되는 제 1 커패시터(C1)와 제 2 커패시터(C2)의 공통 출력단과 변압 회로부의 제 2 권선비 단자 사이에 위치하고, 권선비 선택 스위치(M3)는 제 3 스위칭부를 구성하는 제 7 스위치 소자(S7)와 제 8 스위치 소자(S8)의 공통 출력단과 변압 회로부의 제 3 권선비 단자 사이에 위치하는 것을 특징으로 한다.Here, the turns ratio selection switch (M 1 ) is located between the common output terminal of the fifth switch element (S 5 ) and the sixth switch element (S 6 ) constituting the second switching unit and the first turns ratio terminal of the transformer circuit part, and selects the turns ratio The switch M 2 is located between the common output terminal of the first capacitor C 1 and the second capacitor C 2 connected in series with each other and the second turns ratio terminal of the transformer circuit part, and the turns ratio selection switch M 3 is the third It is characterized in that it is positioned between the common output terminal of the seventh switch element (S 7 ) and the eighth switch element (S 8 ) constituting the switching unit and the third turns ratio terminal of the transformer circuit unit.

그리고 모드선택 스위치(M) 및 권선비 선택 스위치(M1)(M2)(M3)의 스위칭 동작에 의해 서로 다른 권선비를 갖고 G2V(Grid to Vehicle) 동작, V2G(Vehicle to Grid) 동작, LDC(Low Voltage DC/DC Converter)을 하고, G2V(Grid to Vehicle) 동작시에 primary/secondary/tertiary winding 3개 모두를 사용하고, V2G(Vehicle to Grid) 동작시에 primary/tertiary winding 두 개만 사용하고, LDC(Low Voltage DC/DC Converter) 동작시에는 primary/secondary winding 두 개만 사용하는 것을 특징으로 한다.And, by the switching operation of the mode selection switch (M) and the turns ratio selection switch (M 1 ) (M 2 ) (M 3 ), it has a different turns ratio and has a G2V (Grid to Vehicle) operation, V2G (Vehicle to Grid) operation, LDC (Low Voltage DC/DC Converter), all three primary/secondary/tertiary windings are used in G2V (Grid to Vehicle) operation, and only two primary/tertiary windings are used in V2G (Vehicle to Grid) operation. , It is characterized by using only two primary/secondary windings during LDC (Low Voltage DC/DC Converter) operation.

그리고 G2V(Grid to Vehicle) 동작시에 모드선택 스위치(M)가 제 1 스위칭부의 일단(a)에 연결되고 권선비 선택 스위치(M1)과 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M2)는 열린 상태에서 동작하고, V2G(Vehicle to Grid) 동작시에 모드선택 스위치(M)가 제 1 스위칭부의 일단(a)에 연결되고, 권선비 선택 스위치(M2)와 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M1)이 열린 상태에서 동작하고, LDC(Low Voltage DC/DC Converter) 동작시에 모드선택 스위치(M)가 저전압 배터리(LVB)의 일단(b)에 연결되고, 권선비 선택 스위치(M1)과 권선비 선택 스위치(M2)가 닫히며 권선비 선택 스위치(M3)가 열린 상태에서 동작하는 것을 특징으로 한다.And during G2V (Grid to Vehicle) operation, the mode selection switch (M) is connected to one end (a) of the first switching unit, the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 3 ) are closed, and the turns ratio selection switch ( M 2 ) operates in an open state, and during V2G (Vehicle to Grid) operation, the mode selection switch M is connected to one end (a) of the first switching unit, and the turns ratio selection switch M 2 and the turns ratio selection switch ( M 3 ) is closed and the turns ratio selection switch (M 1 ) operates in the open state, and when the LDC (Low Voltage DC/DC Converter) is operating, the mode selection switch (M) is connected to one end (b) of the low voltage battery (LVB). It is connected, and the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 2 ) are closed, and the turns ratio selection switch (M 3 ) is characterized in that it operates in an open state.

그리고 G2V(Grid to Vehicle) 동작시에, 제 1 스위칭부의 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)는 승압형 PFC 제어, 제 2 스위칭부의 제 5,6 스위치 소자(S5)(S6) 및 제 3 스위칭부의 제 7,8 스위치 소자(S7)(S8)는 위상천이 제어, 제 4 스위칭부의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 동기정류기 제어를 하는 것을 특징으로 한다.And during the G2V (Grid to Vehicle) operation, the first, second, and third switch elements (S 1 ) (S 2 ) (S 3 ) (S 4 ) of the first switching unit step-up PFC control, the second switching The negative fifth and sixth switch elements (S 5 ) (S 6 ) and the seventh and eighth switch elements (S 7 ) (S 8 ) of the third switching unit are phase shift control, the fourth switching unit 9, 10, 11, 12 switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) are characterized in that the synchronous rectifier control.

그리고 G2V(Grid to Vehicle) 동작시에, 승압형 PFC(Power Factor Corrector) 컨버터를 통해 220Vrms를 380V로 승압하고, 변압 회로부를 통해 380V를 380 * Np/(Ns+Nt)V(420V 이상)로 승압하고, PSFB(Phase Shifted Full Bridge) 컨버터의 동작을 통해 출력전압 조절을 하고, 출력전압 범위는 300 ~ 420V인 것을 특징으로 한다.And, during G2V (Grid to Vehicle) operation, 220Vrms is boosted to 380V through a step-up PFC (Power Factor Corrector) converter, and 380V is increased to 380 * N p /(N s +N t )V(420V) through the transformer circuit part. above), the output voltage is adjusted through the operation of a PSFB (Phase Shifted Full Bridge) converter, and the output voltage range is 300 ~ 420V.

그리고 V2G(Vehicle to Grid) 동작시에, 제 4 스위칭부의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어, 제 3 스위칭부의 제 7,8 스위치 소자(S7)(S8)는 동기정류기 제어를 하여 추가적인 제어없이 입력전압 범위에서 DC링크 전압을 유지하고, 제 1 스위칭부의 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)는 단상 인버터 제어를 하는 것을 특징으로 한다.And during V2G (Vehicle to Grid) operation, the fourth switching unit 9,10,11,12 switch element (S 9 ) (S 10 ) (S 11 ) (S 12 ) is a phase shift control, the third switching unit The seventh and eighth switch elements (S 7 ) (S 8 ) control the synchronous rectifier to maintain the DC link voltage in the input voltage range without additional control, and the first, second, third, and fourth switch elements (S) of the first switching unit 1 ) (S 2 ) (S 3 ) (S 4 ) is characterized in that the single-phase inverter control.

그리고 V2G(Vehicle to Grid) 동작시에, 입력전압 범위는 300 ~ 420V이고, 변압 회로부를 통해 Vp를 Vt= Vp*Nt/Np로 강압하고, Vdc는 최대 Vt의 2배의 전압을 통해 조절하고, FB(Full Bridge)-HB(Half Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vdc/2=175V 전압을 유지하고, 출력 전압은 220Vrms인 것을 특징으로 한다.And during V2G (Vehicle to Grid) operation, the input voltage range is 300 ~ 420V, and V p is stepped down to V t = V p *N t /N p through the transformer circuit part, and V dc is 2 of the maximum V t Adjusted through the voltage of the double, and through the FB (Full Bridge)-HB (Half Bridge) converter, the first and second capacitors (C 1 ) (C 2 ) maintain the voltage V dc /2=175V, and the output voltage is characterized as 220Vrms.

그리고 LDC(Low Voltage DC/DC Converter) 동작시에, 제 4 스위칭부의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어, 제 2 스위칭부의 제 5,6 스위치 소자(S5)(S6)는 동기정류기 제어를 하는 것을 특징으로 한다.And when the LDC (Low Voltage DC/DC Converter) operation, the 9th, 10 , 11 , 12th switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the fourth switching unit phase shift control, The fifth and sixth switch elements (S 5 ) (S 6 ) of the 2 switching unit control the synchronous rectifier.

그리고 LDC(Low Voltage DC/DC Converter) 동작시에, 입력전압 범위는 300 ~ 420V이고, 변압 회로부를 통해 Vp를 Vs=Vp*Ns/Np로 강압하고, Vo는 Vs의 2배의 전압을 통해 24V로 조절하고, HB(Half Bridge)-FB(Full Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vo/2=12V로 유지하고, 출력전압은 24V로 유지하는 것을 특징으로 한다.And when LDC (Low Voltage DC/DC Converter) is operating, the input voltage range is 300 ~ 420V, and V p is stepped down to V s =V p *N s /N p through the transformer circuit, and V o is V s controlled by a voltage twice that of a 24V, and through the (Half Bridge) (Full Bridge) -FB HB converter, the first and second capacitors (C 1) (C 2) is kept at V o / 2 = 12V and , the output voltage is maintained at 24V.

이상에서 설명한 바와 같은 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 다음과 같은 효과가 있다.The OBC/LDC integrated circuit having multi-function and turns ratio according to the present invention as described above has the following effects.

첫째, 높은 전력밀도를 갖고 추가적인 제어없이 넓은 전압범위의 양방향 동작이 가능하도록 한다.First, it has high power density and enables bidirectional operation of a wide voltage range without additional control.

둘째, OBC와 LDC를 통합하여 하나의 회로로 고전압 배터리와 저전압 보조 배터리를 충전시키는 것에 의해 충전 시스템의 크기를 줄여 전력밀도를 높이고 효율적인 전기자동차 배터리 충전 및 관리가 가능하도록 한다.Second, by integrating OBC and LDC to charge a high-voltage battery and a low-voltage auxiliary battery in one circuit, the size of the charging system is reduced to increase power density and enable efficient electric vehicle battery charging and management.

셋째, OBC/LDC 통합형 회로를 구성하여 추가적인 DC/DC 컨버터가 없이 OBC의 회로만으로 LDC 기능까지 수행할 수 있도록 하여 회로의 복잡도 및 손실을 줄일 수 있도록 한다.Third, the OBC/LDC integrated circuit is configured so that the LDC function can be performed only with the OBC circuit without an additional DC/DC converter, thereby reducing the complexity and loss of the circuit.

넷째, 선택적으로 권선비를 사용하는 것에 의해 추가적인 제어 없이 넓은 전압범위에서 양방향 G2V 와 V2G 기능을 모두 수행하고, LDC 기능에서 적은 스위치만을 사용하여 동작하는 것에 의해 충전 제어 효율을 높일 수 있도록 한다.Fourth, by selectively using the turns ratio, both the bidirectional G2V and V2G functions are performed in a wide voltage range without additional control, and the charge control efficiency can be increased by operating using only a small number of switches in the LDC function.

도 1a와 도 1b는 일반적인 OBC 구성 블록도 및 회로 구성도
도 2a와 도 2b는 일반적인 LDC 구성 블록도 및 회로 구성도
도 3은 종래 기술의 OBC/LDC 통합형 회로 구성도
도 4는 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로 구성도
도 5내지 도 7은 본 발명에 따른 OBC/LDC 통합형 회로의 모드에 따른 동작 설명도1A and 1B are a block diagram and a circuit diagram of a general OBC configuration.
2a and 2b are a general LDC configuration block diagram and circuit configuration diagram
3 is an OBC / LDC integrated circuit diagram of the prior art
4 is a block diagram of an OBC/LDC integrated circuit having a multi function and a turns ratio according to the present invention;
5 to 7 are operation explanatory diagrams according to the mode of the OBC / LDC integrated circuit according to the present invention

이하, 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로의 바람직한 실시 예에 관하여 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the OBC/LDC integrated circuit having multi-function and turns ratio according to the present invention will be described in detail as follows.

본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로의 특징 및 이점들은 이하에서의 각 실시 예에 대한 상세한 설명을 통해 명백해질 것이다.Features and advantages of the OBC/LDC integrated circuit having a multi-function and turns ratio according to the present invention will become apparent through the detailed description of each embodiment below.

도 4는 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로 구성도이다.4 is a block diagram of an OBC/LDC integrated circuit having multiple functions and a turns ratio according to the present invention.

본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 OBC와 LDC를 통합하여 하나의 회로로 고전압 배터리와 저전압 보조 배터리를 충전시키는 것에 의해 충전 시스템의 크기를 줄여 전력밀도를 높이고 효율적인 전기자동차 배터리 충전 및 관리가 가능하도록 한 것이다.The OBC/LDC integrated circuit having multi-function and turns ratio according to the present invention reduces the size of the charging system by integrating OBC and LDC to charge a high-voltage battery and a low-voltage auxiliary battery in one circuit, thereby increasing power density and increasing the efficiency of electric vehicles. It is designed to enable battery charging and management.

본 발명은 OBC/LDC 통합형 회로를 구성하여 추가적인 DC/DC 컨버터가 없이 OBC의 회로만으로 LDC 기능까지 수행할 수 있도록 하고, 선택적으로 권선비를 사용하는 것에 의해 추가적인 제어 없이 넓은 전압범위에서 양방향 G2V 와 V2G 기능을 모두 수행하고, LDC 기능에서 적은 스위치만을 사용하여 동작하는 것에 의해 충전 효율을 높일 수 있도록 한 것이다.The present invention configures an OBC/LDC integrated circuit so that the LDC function can be performed only with the OBC circuit without an additional DC/DC converter, and bidirectional G2V and V2G in a wide voltage range without additional control by selectively using a turns ratio By performing all functions and operating using only a small number of switches in the LDC function, the charging efficiency can be increased.

이하의 설명에서 Function I으로 설명되는 G2V(Grid to Vehicle)는 그리드(Grid)로부터 고전압 배터리(HVB)를 충전하는 기능이고, Function Ⅱ로 설명되는 V2G(Vehicle to Grid)는 고전압 배터리(HVB)로부터 그리드로 전력을 전송하는 기능이고, Function Ⅲ으로 설명되는 LDC(Low Voltage DC/DC Converter)는 고전압 배터리로부터 저전압 배터리를 충전하는 기능을 의미한다.G2V (Grid to Vehicle) described as Function I in the following description is a function of charging the high voltage battery (HVB) from the grid, and V2G (Vehicle to Grid) described as Function II is from the high voltage battery (HVB). It is a function of transmitting power to the grid, and LDC (Low Voltage DC/DC Converter) described as Function Ⅲ means a function of charging a low voltage battery from a high voltage battery.

그리고 도면 및 이하의 설명에서 변압기의 권선수는 Np는 변압기 1차 권선 수,　Ns는 변압기 2차 권선 수, Nt는 변압기 3차 권선 수로 정의되고, 변압기의 기전력은 Vp는　변압기 1차 기전력, Vs는 변압기 2차 기전력, Vt는 변압기 3차 기전력이고, Vo는 LDC의 출력 전압을 의미한다.And in the drawings and the following description, the number of turns of the transformer is defined as N p is the number of primary windings of the transformer, N s is the number of secondary windings of the transformer, N t is the number of tertiary windings of the transformer, and the electromotive force of the transformer is V p is the number of transformer 1 The secondary electromotive force, V s is the transformer secondary electromotive force, V t is the transformer third electromotive force, and V o is the output voltage of the LDC.

본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 도 4에서와 같이, 풀 브릿지 회로를 구성하는 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)를 갖고 제 1,2 인덕터(L1)(L2)를 통하여 계통(40)에 연결되는 제 1 스위칭부(41)와, 제 2 스위칭부(44) 또는 DC 링크 커패시터(Cdc)와 병렬 연결되는 저전압 배터리(LVB)(43)와, 제 1 스위칭부(41)의 일단(a) 또는 저전압 배터리(LVB)(43)의 일단(b)에 선택적으로 연결하기 위한 스위칭을 하는 모드선택 스위치(M)(42)와, 저전압 배터리(LVB)(43)에 병렬 연결되는 DC 링크 커패시터(Cdc) 및 서로 직렬 연결되어 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 1,2 커패시터(C1)(C2)와, 하프 브릿지 회로를 구성하는 제 5,6 스위치 소자(S5)(S6)를 갖고 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 2 스위칭부(44)와, 하프 브릿지 회로를 구성하는 제 7,8 스위치 소자(S7)(S8)를 갖고 제 2 스위칭부(44)에 병렬 연결되는 제 3 스위칭부(45)와, 권선비 선택 스위치(M1)(M2)(M3)의 스위칭 동작에 의해 G2V(Grid to Vehicle) 동작,V2G(Vehicle to Grid) 동작,LDC(Low Voltage DC/DC Converter) 동작에 따라 서로 다른 권선비를 갖고 변압 동작을 수행하는 변압 회로부(48)와, 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)를 갖고 제 2,3 스위칭부(44)(45)에 대응하여 변압 회로부(48)에 연결되어 DC-DC 컨버터를 구성하는 제 4 스위칭부(46)와, 제 4 스위칭부(46)에 병렬 연결되는 고전압 배터리(HVB)(47)를 포함한다.The OBC/LDC integrated circuit having a multi-function and turns ratio according to the present invention is, as shown in FIG. 4, the first , second , third , and fourth switch elements constituting the full bridge circuit (S 1 ) (S 2 ) (S 3 ) A first switching unit 41 having (S 4 ) and connected to the system 40 through the first and second inductors (L 1 ) (L 2 ), and a second switching unit 44 or DC link capacitor (C) dc ) and a low voltage battery (LVB) 43 connected in parallel, and switching for selectively connecting one end (a) of the first switching unit 41 or one end (b) of the low voltage battery (LVB) 43 Mode selection switch (M) 42 and the low voltage battery (LVB) (43) connected in parallel to the DC link capacitor (C dc ) and each other in series with the first connected in parallel to the DC link capacitor (C dc ), 2 capacitors (C 1 ) (C 2 ) and fifth and sixth switch elements (S 5 ) (S 6 ) constituting the half-bridge circuit and a second switching unit connected in parallel to the DC link capacitor (C dc ) ( 44), a third switching unit 45 having seventh and eighth switch elements (S 7 ) (S 8 ) constituting a half-bridge circuit and connected in parallel to the second switching unit 44, and a turns ratio selection switch ( By switching operation of M 1 )(M 2 )(M 3 ), it has different turns ratio according to G2V(Grid to Vehicle) operation, V2G(Vehicle to Grid) operation, and LDC(Low Voltage DC/DC Converter) operation. It has a transformer circuit unit 48 for performing an operation, and ninth , 10 , 11 , and twelfth switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) and second, third switching units 44, 45 ), a fourth switching unit 46 that is connected to the transformer circuit unit 48 to configure a DC-DC converter, and a high voltage battery (HVB) 47 connected in parallel to the fourth switching unit 46 . .

여기서, 권선비 선택 스위치(M1)은 제 2 스위칭부(44)를 구성하는 제 5 스위치 소자(S5)와 제 6 스위치 소자(S6)의 공통 출력단과 변압 회로부(48)의 제 1 권선비 단자와 연결되고, 권선비 선택 스위치(M2)는 서로 직렬 연결되는 제 1 커패시터(C1)와 제 2 커패시터(C2)의 공통 출력단과 변압 회로부(48)의 제 2 권선비 단자와 연결되고, 권선비 선택 스위치(M3)는 제 3 스위칭부(45)를 구성하는 제 7 스위치 소자(S7)와 제 8 스위치 소자(S8)의 공통 출력단과 변압 회로부(48)의 제 3 권선비 단자와 연결되는 것이다.Here, the turns ratio selection switch (M 1 ) is a common output terminal of the fifth switch element (S 5 ) and the sixth switch element (S 6 ) constituting the second switching unit 44 and the first turns ratio of the transformer circuit unit 48 . connected to the terminal, and the turns ratio selection switch (M 2 ) is connected to a common output terminal of the first capacitor (C 1 ) and the second capacitor (C 2 ) connected in series with each other and the second turns ratio terminal of the transformer circuit unit (48), The turns ratio selection switch (M 3 ) is a third turns ratio terminal and a common output terminal of the seventh switch element (S 7 ) and the eighth switch element (S 8 ) constituting the third switching unit 45 and the third turns ratio terminal of the transformer circuit unit 48 and will be connected

도 4에서와 같이, 모드선택 스위치(M)(42)가 제 1 스위칭부(41)의 일단(a) 또는 저전압 배터리(LVB)(43)의 일단(b)를 DC 링크 커패시터(Cdc)에 병렬 연결하기 위한 위치에 구성되고, 스위칭 동작에 의해 G2V(Grid to Vehicle) 동작,V2G(Vehicle to Grid) 동작,LDC(Low Voltage DC/DC Converter) 동작에 따라 서로 다른 권선비를 갖고 변압 동작되도록 하는 권선비 선택 스위치(M1)(M2)(M3)가 구비된다.As in FIG. 4 , the mode selection switch (M) 42 connects one end (a) of the first switching unit 41 or one end (b) of the low voltage battery (LVB) 43 to the DC link capacitor (C dc ) It is configured in a position for parallel connection to the A turns ratio selection switch (M 1 ) (M 2 ) (M 3 ) is provided.

그리고 DC 링크 캐패시턴스 크기를 유지하기 위하여 DC 링크 커패시터(Cdc) 및 서로 직렬 연결되어 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 1,2 커패시터(C1)(C2)가 구비된다.And in order to maintain the DC link capacitance size, the DC link capacitor (C dc ) and first and second capacitors (C 1 ) (C 2 ) connected in series to each other and connected in parallel to the DC link capacitor (C dc ) are provided.

본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 [Function Ⅰ]의 G2V(Grid to Vehicle) 동작시에 primary/secondary/tertiary winding 3개 모두를 사용한다.The OBC/LDC integrated circuit having multi-function and turns ratio according to the present invention uses all three primary/secondary/tertiary windings during G2V (Grid to Vehicle) operation of [Function I].

[Function Ⅱ]의 V2G(Vehicle to Grid) 동작시에 primary/tertiary winding 두 개만 사용한다.Only two primary/tertiary windings are used during V2G (Vehicle to Grid) operation of [Function Ⅱ].

[Function Ⅱ]의 V2G(Vehicle to Grid) 동작시에 제 7,8,9,10,11,12 스위치 소자(S7)(S8)(S9)(S10)(S11)(S12)가 FB(Full Bridge)-HB(Half Bridge) DC/DC 컨버터를 구성하고, 추가적인 제어과정 없이 넓은 입력전압 범위의 동작이 가능하도록 한다. 7,8,9,10,11,12th switch element (S 7 )(S 8 )(S 9 )(S 10 )(S 11 )(S during V2G (Vehicle to Grid) operation of [Function Ⅱ] 12 ) constitutes the FB (Full Bridge)-HB (Half Bridge) DC/DC converter and enables operation of a wide input voltage range without additional control process.

[Function Ⅲ]의 LDC(Low Voltage DC/DC Converter) 동작시에는 primary/secondary winding 두 개만 사용하고, When the LDC (Low Voltage DC/DC Converter) of [Function Ⅲ] operates, only two primary/secondary windings are used,

제 5,6,9,10,11,12 스위치 소자(S5)(S6)(S9)(S10)(S11)(S12)가 FB(Full Bridge)-HB(Half Bridge) DC/DC 컨버터를 구성하고, 제 1,2 커패시터(C1)(C2)의 전압은 Vaux/2=Vs를 유지한다.5,6,9,10,11,12th switch element (S 5 )(S 6 )(S 9 )(S 10 )(S 11 )(S 12 ) is FB(Full Bridge)-HB(Half Bridge) A DC/DC converter is configured, and the voltage of the first and second capacitors C 1 (C 2 ) is maintained at V aux /2=V s .

이와 같은 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 통합하지 않은 분리형 회로에 비해 적은 스위치로 3가지 기능을 모두 수행할 수 있다는 장점이 있다. The OBC/LDC integrated circuit having the multi-function and turns ratio according to the present invention has the advantage that it can perform all three functions with fewer switches compared to the non-integrated separate circuit.

동작 과정은 첫 번째 G2V 기능은 모드선택 스위치(M)(42)가 제 1 스위칭부(41)의 일단(a)에 연결되고 권선비 선택 스위치(M1)과 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M2)는 열린 상태에서 동작한다. 이때는 3개의 권선비를 모두 사용하여 기존의 통합형 회로와 동일하게 동작하게 된다. The operation process is the first G2V function, the mode selection switch (M) 42 is connected to one end (a) of the first switching unit 41, and the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 3 ) are closed. and turns ratio selection switch (M 2 ) operates in an open state. In this case, all three turns ratios are used to operate the same as the existing integrated circuit.

두 번째 V2G 기능은 모드선택 스위치(M)(42)가 제 1 스위칭부(41)의 일단(a)에 연결되고, 권선비 선택 스위치(M2)와 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M1)이 열린 상태에서 동작한다.The second V2G function is that the mode selection switch (M) 42 is connected to one end (a) of the first switching unit 41, the turns ratio selection switch (M 2 ) and the turns ratio selection switch (M 3 ) are closed, and the turns ratio The selection switch (M 1 ) operates in an open state.

이때 DC/DC 컨버터의 권선비는 3가지 권선비중 Np와 Nt 두개의 권선비만 사용하게 되고, 앞 단은 풀 브릿지로, 뒷단은 하프 브릿지로 이루어진 DC/DC컨버터의 동작으로 기능을 수행한다. At this time, the turns ratio of the DC/DC converter uses only two turns ratios, N p and N t, of three turns ratio, and the front stage functions as a full bridge and the rear stage functions as a DC/DC converter consisting of a half bridge.

이때 뒷단을 구성하는 제 7,8 스위치 소자(S7)(S8)는 동기정류기의 제어만으로 동작한다.At this time, the seventh and eighth switch elements (S 7 ) (S 8 ) constituting the rear stage operate only under the control of the synchronous rectifier.

이를 통해 고정된 권선비에 의한 추가적인 제어 없이 단순 동기정류기 역할만으로는 넓은 전압범위의 양방향 동작이 불가능 하다는 단점을 개선하는 것이다.This is to improve the disadvantage that bidirectional operation of a wide voltage range is impossible only with a simple synchronous rectifier role without additional control by a fixed turns ratio.

세 번째 LDC 기능은 모드선택 스위치(M)(42)가 저전압 배터리(LVB)(43)의 일단(b)에 연결되고, 권선비 선택 스위치(M1)과 권선비 선택 스위치(M2)가 닫히며 권선비 선택 스위치(M3)가 열린 상태에서 동작한다.The third LDC function is that the mode selection switch (M) 42 is connected to one end (b) of the low voltage battery (LVB) 43, the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 2 ) are closed, Turns ratio selection switch (M 3 ) operates in an open state.

이 기능에서도 Np와 Ns 두개의 권선비만 사용하게 되고, 앞 단은 풀 브릿지로, 뒷단은 하프 브릿지로 이루어진 DC/DC컨버터의 동작으로 기능을 수행한다. In this function, only two turns ratios of N p and N s are used, and the front stage functions as a full bridge and the rear stage functions as a DC/DC converter consisting of a half bridge.

종래 기술의 통합형 회로가 12개의 스위치를 거쳐 LDC 동작을 수행하는 반면 위의 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 6개의 스위치를 거쳐 동작하고, 이에 따라 효율이 높아지는 장점이 있다.While the integrated circuit of the prior art performs the LDC operation through 12 switches, the OBC/LDC integrated circuit having multi-function and turns ratio according to the present invention operates through 6 switches, and thus the efficiency is increased. have.

G2V(Grid to Vehicle) 동작,V2G(Vehicle to Grid) 동작,LDC(Low Voltage DC/DC Converter) 동작에 따른 구체적인 동작 특성을 설명하면 다음과 같다.Specific operating characteristics according to G2V (Grid to Vehicle) operation, V2G (Vehicle to Grid) operation, and LDC (Low Voltage DC/DC Converter) operation will be described as follows.

도 5내지 도 7은 본 발명에 따른 OBC/LDC 통합형 회로의 모드에 따른 동작 설명도이다.5 to 7 are operation explanatory diagrams according to modes of the OBC/LDC integrated circuit according to the present invention.

도 5는 [Function Ⅰ]의 G2V(Grid to Vehicle) 동작시의 동작 설명도이다.5 is an explanatory diagram of the operation of [Function I] during G2V (Grid to Vehicle) operation.

모드선택 스위치(M)(42)가 제 1 스위칭부(41)의 일단(a)에 연결되고 권선비 선택 스위치(M1)과 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M2)는 열린 상태에서 G2V(Grid to Vehicle) 동작을 시작한다.The mode selection switch (M) 42 is connected to one end (a) of the first switching unit 41 and the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 3 ) are closed, and the turns ratio selection switch (M 2 ) Starts G2V (Grid to Vehicle) operation in the open state.

승압형 PFC(Power Factor Corrector) 컨버터를 통해 220Vrms를 380V로 승압하고, 변압 회로부를 통해 380V를 380 * Np/(Ns+Nt)V(420V 이상)로 승압한다.It boosts 220Vrms to 380V through a step-up PFC (Power Factor Corrector) converter, and boosts 380V to 380 * N p /(N s +N t )V (more than 420V) through the transformer circuit.

PSFB(Phase Shifted Full Bridge) 컨버터의 동작을 통해 출력전압 조절을 하고, 출력전압 범위는 300 ~ 420V이다.The output voltage is controlled through the operation of the PSFB (Phase Shifted Full Bridge) converter, and the output voltage range is 300 ~ 420V.

G2V(Grid to Vehicle) 동작 제어는 제 1 스위칭부(41)의 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)는 승압형 PFC 제어, 제 2 스위칭부(44)의 제 5,6 스위치 소자(S5)(S6) 및 제 3 스위칭부(45)의 제 7,8 스위치 소자(S7)(S8)는 위상천이 제어, 제 4 스위칭부(46)의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 동기정류기 제어를 한다.G2V (Grid to Vehicle) operation control is the first, second, and third switch elements (S 1 ) (S 2 ) (S 3 ) (S 4 ) of the first switching unit 41 is a step-up PFC control, the first The fifth and sixth switch elements (S 5 ) (S 6 ) of the second switching unit 44 and the seventh and eighth switch elements (S 7 ) (S 8 ) of the third switching unit 45 are phase shift control, first The 9th, 10th, 11th, and 12th switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the 4 switching unit 46 control the synchronous rectifier.

도 6은 [Function Ⅱ]의 V2G(Vehicle to Grid) 동작시의 동작 설명도이다.6 is an explanatory diagram of the operation of [Function II] during V2G (Vehicle to Grid) operation.

모드선택 스위치(M)(42)가 제 1 스위칭부(41)의 일단(a)에 연결되고, 권선비 선택 스위치(M2)와 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M1)이 열린 상태에서 V2G(Vehicle to Grid) 동작을 시작한다.The mode selection switch (M) 42 is connected to one end (a) of the first switching unit 41, the turns ratio selection switch (M 2 ) and the turns ratio selection switch (M 3 ) are closed, and the turns ratio selection switch (M 1 ) ) is opened and V2G (Vehicle to Grid) operation starts.

입력전압 범위는 300 ~ 420V이고, 변압 회로부를 통해 Vp를 Vt= Vp*Nt/Np로 강압하고, Vdc는 최대 Vt의 2배의 전압을 통해 조절 가능하다.The input voltage range is 300 ~ 420V, and V p is stepped down to V t = V p *N t /N p through the transformer circuit part, and V dc is adjustable through a voltage twice the maximum V t .

FB(Full Bridge)-HB(Half Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vdc/2=175V 전압을 유지하고, 출력 전압은 220Vrms이다.Through the FB (Full Bridge)-HB (Half Bridge) converter, the first and second capacitors C 1 (C 2 ) maintain a voltage of V dc /2=175V, and the output voltage is 220Vrms.

제 4 스위칭부(46)의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어, 제 3 스위칭부(45)의 제 7,8 스위치 소자(S7)(S8)는 동기정류기 제어를 하여 추가적인 제어 없이 넓은 입력전압 범위에서 350V의 DC링크 전압을 유지할 수 있다. The ninth , 10 , 11 , twelfth switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the fourth switching unit 46 are phase shift control, the seventh of the third switching unit 45 , 8 switch elements (S 7 ) (S 8 ) can maintain a DC link voltage of 350V in a wide input voltage range without additional control by controlling the synchronous rectifier.

제 1 스위칭부(41)의 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)는 단상 인버터 제어를 한다.The first, second, and third switch elements (S 1 ) (S 2 ) (S 3 ) (S 4 ) of the first switching unit 41 perform single-phase inverter control.

본 발명은 [Function Ⅱ]의 V2G(Vehicle to Grid) 동작시에 Variable DC Link Control 및 Boost control 등의 추가적인 제어 불필요한 것으로, 추가적인 제어 없이 넓은 입력전압 범위의 동작이 가능하고, 시뮬레이션상 효율을 증가시킨다.The present invention does not require additional control such as Variable DC Link Control and Boost control during V2G (Vehicle to Grid) operation of [Function II]. It enables operation of a wide input voltage range without additional control and increases simulation efficiency. .

도 7은 [Function Ⅲ]의 LDC(Low Voltage DC/DC Converter) 동작시의 동작 설명도이다.7 is an explanatory diagram of the operation of [Function Ⅲ] when the LDC (Low Voltage DC/DC Converter) is in operation.

모드선택 스위치(M)(42)가 저전압 배터리(LVB)(43)의 일단(b)에 연결되고, 권선비 선택 스위치(M1)과 권선비 선택 스위치(M2)가 닫히며 권선비 선택 스위치(M3)가 열린 상태에서 LDC 동작을 시작한다.The mode selection switch (M) 42 is connected to one end (b) of the low voltage battery (LVB) 43, the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 2 ) are closed, and the turns ratio selection switch (M 3 ) starts LDC operation in the open state.

입력전압 범위는 300 ~ 420V이고, 변압 화로부를 통해 Vp를 Vs=Vp*Ns/Np로 강압하고, Vo는 Vs의 2배의 전압을 통해 24V로 조절 가능하다.The input voltage range is 300 ~ 420V, and V p is stepped down to V s =V p *N s /N p through the transformer furnace, and V o can be adjusted to 24V through twice the voltage of V s.

HB(Half Bridge)-FB(Full Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vo/2=12V로 유지하고, 출력전압은 24V로 유지한다.Through the HB (Half Bridge)-FB (Full Bridge) converter, the first and second capacitors C 1 (C 2 ) are maintained at V o /2=12V, and the output voltage is maintained at 24V.

제 4 스위칭부(46)의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어, 제 2 스위칭부(44)의 제 5,6 스위치 소자(S5)(S6)는 동기정류기 제어를 하여, Buck control 등의 추가적인 제어가 불필요하여 추가적인 제어 및 소자 없이 LDC 동작이 가능하고, 시뮬레이션상 효율을 향상시킬 수 있다. The ninth , 10 , 11 , twelfth switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the fourth switching unit 46 are phase shift control, the fifth of the second switching unit 44, 6 switch elements (S 5 ) (S 6 ) control the synchronous rectifier, so that additional control such as buck control is unnecessary, LDC operation is possible without additional control and element, and efficiency in simulation can be improved.

이상에서 설명한 본 발명에 따른 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로는 OBC/LDC 통합형 회로를 구성하여 추가적인 DC/DC 컨버터가 없이 OBC의 회로만으로 LDC 기능까지 수행할 수 있도록 하고, 선택적으로 권선비를 사용하는 것에 의해 추가적인 제어 없이 넓은 전압범위에서 양방향 G2V 와 V2G 기능을 모두 수행하고, LDC 기능에서 적은 스위치만을 사용하여 동작하는 것에 의해 충전 효율을 높일 수 있도록 한 것이다.The OBC/LDC integrated circuit having multiple functions and turns ratio according to the present invention described above constitutes the OBC/LDC integrated circuit so that the LDC function can be performed only with the OBC circuit without an additional DC/DC converter, and optionally the turns ratio By using , both the bidirectional G2V and V2G functions are performed in a wide voltage range without additional control, and the charging efficiency can be increased by operating using only a small number of switches in the LDC function.

이상에서의 설명에서와 같이 본 발명의 본질적인 특성에서 벗어나지 않는 범위에서 변형된 형태로 본 발명이 구현되어 있음을 이해할 수 있을 것이다.It will be understood that the present invention is implemented in a modified form without departing from the essential characteristics of the present invention as described above.

그러므로 명시된 실시 예들은 한정적인 관점이 아니라 설명적인 관점에서 고려되어야 하고, 본 발명의 범위는 전술한 설명이 아니라 특허청구 범위에 나타나 있으며, 그와 동등한 범위 내에 있는 모든 차이점은 본 발명에 포함된 것으로 해석되어야 할 것이다.Therefore, the specified embodiments are to be considered in an illustrative rather than a restrictive sense, the scope of the present invention is indicated in the claims rather than in the foregoing description, and all differences within the scope equivalent thereto are included in the present invention. will have to be interpreted.

40. 계통 41. 제 1 스위칭부
42. 모드 선택 스위치 43. LVB
44. 제 2 스위칭부 45. 제 3 스위칭부
46. 제 4 스위칭부 47. HVB
48. 변압 회로부40. System 41. First switching unit
42. Mode select switch 43. LVB
44. Second switching unit 45. Third switching unit
46. Fourth switching unit 47. HVB
48. Transformer circuit part

Claims (10)

풀 브릿지 회로를 구성하는 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)를 갖고 제 1,2 인덕터(L1)(L2)를 통하여 계통에 연결되는 제 1 스위칭부;
제 2 스위칭부 또는 DC 링크 커패시터(Cdc)와 병렬 연결되는 저전압 배터리(LVB);
제 1 스위칭부의 일단(a) 또는 저전압 배터리(LVB)의 일단(b)에 선택적으로 연결하기 위한 스위칭을 하는 모드선택 스위치(M);
저전압 배터리(LVB)에 병렬 연결되는 DC 링크 커패시터(Cdc) 및 서로 직렬 연결되어 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 1,2 커패시터(C1)(C2);
하프 브릿지 회로를 구성하는 제 5,6 스위치 소자(S5)(S6)를 갖고 DC 링크 커패시터(Cdc)에 병렬 연결되는 제 2 스위칭부;
하프 브릿지 회로를 구성하는 제 7,8 스위치 소자(S7)(S8)를 갖고 제 2 스위칭부에 병렬 연결되는 제 3 스위칭부;
상기 제 2,3 스위칭부에 일단이 연결되고, 권선비 선택 스위치(M1)(M2)(M3)의 스위칭 동작에 의해 서로 다른 권선비를 갖고 변압 동작을 수행하는 변압 회로부;
제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)를 갖고 제 2,3 스위칭부에 대응하여 변압 회로부의 타단에 연결되어 DC-DC 컨버터를 구성하는 제 4 스위칭부; 및 제 4 스위칭부에 병렬 연결되는 고전압 배터리(HVB);를 포함하고,
모드선택 스위치(M) 및 권선비 선택 스위치(M1)(M2)(M3)의 스위칭 동작에 의해 서로 다른 권선비를 갖고 G2V(Grid to Vehicle) 동작, V2G(Vehicle to Grid) 동작, LDC(Low Voltage DC/DC Converter)을 하고, G2V(Grid to Vehicle) 동작시에 primary/secondary/tertiary winding 3개 모두를 사용하고, V2G(Vehicle to Grid) 동작시에 primary/tertiary winding 두 개만 사용하고, LDC(Low Voltage DC/DC Converter) 동작시에는 primary/secondary winding 두 개만 사용하는 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로. The first , second , and third switch elements (S 1 ) (S 2 ) (S 3 ) (S 4 ) constituting the full bridge circuit have the first and second inductors (L 1 ) (L 2 ) through the system a first switching unit connected to;
Low voltage battery (LVB) connected in parallel with the second switching unit or DC link capacitor (C dc );
a mode selection switch (M) for selectively connecting to one end (a) of the first switching unit or one end (b) of the low voltage battery (LVB);
DC link capacitor (C dc ) connected in parallel to the low voltage battery (LVB) and first and second capacitors (C 1 ) (C 2 ) connected in series to each other and connected in parallel to the DC link capacitor (C dc );
A second switching unit having fifth and sixth switch elements constituting the half-bridge circuit (S 5 ) (S 6 ) and connected in parallel to the DC link capacitor (C dc );
a third switching unit having seventh and eighth switch elements constituting the half-bridge circuit (S 7 ) (S 8 ) and connected in parallel to the second switching unit;
a transformer circuit unit having one end connected to the second and third switching units and performing a transformation operation with a different turns ratio by a switching operation of a turns ratio selection switch (M 1 ) (M 2 ) (M 3 );
The 9th, 10th, 11th, and 12th switch elements (S 9 ) (S 10 ) (S 11 ) (S 12 ) are connected to the other end of the transformer circuit unit corresponding to the second and third switching units to constitute a DC-DC converter a fourth switching unit; and a high voltage battery (HVB) connected in parallel to the fourth switching unit;
A mode selection switch (M) and a turn ratio selection switch (M 1) (M 2) (M 3) have a different turns ratio by the switching operation (Grid to Vehicle) G2V of operation, V2G (Vehicle to Grid) operation, LDC ( Low Voltage DC/DC Converter), all three primary/secondary/tertiary windings are used in G2V (Grid to Vehicle) operation, and only two primary/tertiary windings are used in V2G (Vehicle to Grid) operation, OBC/LDC integrated circuit with multi-function and turns ratio, characterized in that only two primary/secondary windings are used during LDC (Low Voltage DC/DC Converter) operation. 제 1 항에 있어서, 권선비 선택 스위치(M1)은 제 2 스위칭부를 구성하는 제 5 스위치 소자(S5)와 제 6 스위치 소자(S6)의 공통 출력단과 변압 회로부의 제 1 권선비 단자 사이에 위치하고,
권선비 선택 스위치(M2)는 서로 직렬 연결되는 제 1 커패시터(C1)와 제 2 커패시터(C2)의 공통 출력단과 변압 회로부의 제 2 권선비 단자 사이에 위치하고,
권선비 선택 스위치(M3)는 제 3 스위칭부를 구성하는 제 7 스위치 소자(S7)와 제 8 스위치 소자(S8)의 공통 출력단과 변압 회로부의 제 3 권선비 단자 사이에 위치하는 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.According to claim 1, wherein the turns ratio selection switch (M 1 ) between the common output terminal of the fifth switch element (S 5 ) and the sixth switch element (S 6 ) constituting the second switching part and the first turns ratio terminal of the transformer circuit part located,
The turns ratio selection switch (M 2 ) is located between the common output terminal of the first capacitor (C 1 ) and the second capacitor (C 2 ) connected in series with each other and the second turns ratio terminal of the transformer circuit part,
The turns ratio selection switch (M 3 ) is located between the common output terminal of the seventh switch element (S 7 ) and the eighth switch element (S 8 ) constituting the third switching unit and the third turns ratio terminal of the transformer circuit part. OBC/LDC integrated circuit with multi-function and turns ratio. 삭제delete 제 1 항에 있어서, G2V(Grid to Vehicle) 동작시에 모드선택 스위치(M)가 제 1 스위칭부의 일단(a)에 연결되고 권선비 선택 스위치(M1)과 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M2)는 열린 상태에서 동작하고,
V2G(Vehicle to Grid) 동작시에 모드선택 스위치(M)가 제 1 스위칭부의 일단(a)에 연결되고, 권선비 선택 스위치(M2)와 권선비 선택 스위치(M3)가 닫히며 권선비 선택 스위치(M1)이 열린 상태에서 동작하고,
LDC(Low Voltage DC/DC Converter) 동작시에 모드선택 스위치(M)가 저전압 배터리(LVB)의 일단(b)에 연결되고, 권선비 선택 스위치(M1)과 권선비 선택 스위치(M2)가 닫히며 권선비 선택 스위치(M3)가 열린 상태에서 동작하는 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.The method according to claim 1, wherein the mode selection switch (M) is connected to one end (a) of the first switching unit during G2V (Grid to Vehicle) operation, and the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 3 ) are closed. and turns ratio selection switch (M 2 ) operates in an open state,
During V2G (Vehicle to Grid) operation, the mode selection switch (M) is connected to one end (a) of the first switching unit, the turns ratio selection switch (M 2 ) and the turns ratio selection switch (M 3 ) are closed, and the turns ratio selection switch ( M 1 ) operates in the open state,
During LDC (Low Voltage DC/DC Converter) operation, the mode selection switch (M) is connected to one end (b) of the low voltage battery (LVB), and the turns ratio selection switch (M 1 ) and the turns ratio selection switch (M 2 ) are closed. OBC/LDC integrated circuit with multi-function and turns ratio, characterized in that it operates in an open state and turns ratio selection switch (M 3 ). 삭제delete 삭제delete 제 4 항에 있어서, V2G(Vehicle to Grid) 동작시에,
제 4 스위칭부의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어,
제 3 스위칭부의 제 7,8 스위치 소자(S7)(S8)는 동기정류기 제어를 하여 추가적인 제어없이 입력전압 범위에서 DC링크 전압을 유지하고,
제 1 스위칭부의 제 1,2,3,4 스위치 소자(S1)(S2)(S3)(S4)는 단상 인버터 제어를 하는 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.The method of claim 4, wherein during V2G (Vehicle to Grid) operation,
9th, 10 , 11 , 12th switch element (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the fourth switching unit is a phase shift control,
The seventh and eighth switch elements (S 7 ) (S 8 ) of the third switching unit maintain the DC link voltage in the input voltage range without additional control by controlling the synchronous rectifier,
OBC/LDC integrated type with multi-function and turns ratio, characterized in that the first , second , third , and fourth switch elements (S 1 ) (S 2 ) (S 3 ) (S 4 ) of the first switching unit perform single-phase inverter control Circuit. 제 4 항 또는 제 7 항에 있어서, V2G(Vehicle to Grid) 동작시에,
입력전압 범위는 300 ~ 420V이고, 변압 회로부를 통해 Vp를 Vt= Vp*Nt/Np로 강압하고, Vdc는 최대 Vt의 2배의 전압을 통해 조절하고,
FB(Full Bridge)-HB(Half Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vdc/2=175V 전압을 유지하고, 출력 전압은 220Vrms이고, Vp는　변압기 1차 기전력,Vt는 변압기 3차 기전력,Np는 변압기 1차 권선 수, Nt는 변압기 3차 권선 수인 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.The method of claim 4 or 7, wherein during V2G (Vehicle to Grid) operation,
The input voltage range is 300 ~ 420V, and V p is stepped down to V t = V p *N t /N p through the transformer circuit part, and V dc is controlled through a voltage twice the maximum V t ,
Through the FB (Full Bridge)-HB (Half Bridge) converter, the first and second capacitors (C 1 )(C 2 ) maintain a voltage of V dc /2=175V, the output voltage is 220Vrms, and V p is a transformer OBC/LDC integrated circuit with multi-function and turns ratio, characterized in that the primary electromotive force, V t is the transformer tertiary electromotive force, N p is the number of primary windings of the transformer, and N t is the number of tertiary windings of the transformer. 제 4 항에 있어서, LDC(Low Voltage DC/DC Converter) 동작시에,
제 4 스위칭부의 제 9,10,11,12 스위치 소자(S9)(S10)(S11)(S12)는 위상천이 제어,
제 2 스위칭부의 제 5,6 스위치 소자(S5)(S6)는 동기정류기 제어를 하는 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.The method according to claim 4, wherein when a Low Voltage DC/DC Converter (LDC) is operated,
9th, 10 , 11 , 12th switch element (S 9 ) (S 10 ) (S 11 ) (S 12 ) of the fourth switching unit is a phase shift control,
OBC/LDC integrated circuit with multi-function and turns ratio, characterized in that the fifth and sixth switch elements (S 5 ) (S 6 ) of the second switching unit control the synchronous rectifier. 제 4 항 또는 제 9 항에 있어서, LDC(Low Voltage DC/DC Converter) 동작시에,
입력전압 범위는 300 ~ 420V이고, 변압 회로부를 통해 Vp를 Vs=Vp*Ns/Np로 강압하고, Vo는 Vs의 2배의 전압을 통해 24V로 조절하고,
HB(Half Bridge)-FB(Full Bridge) 컨버터를 통해, 제 1,2 커패시터(C1)(C2)는 Vo/2=12V로 유지하고, 출력전압은 24V로 유지하고, Vp는　변압기 1차 기전력,Vs는 변압기 2차 기전력,Np는 변압기 1차 권선 수,Ns는 변압기 2차 권선 수,Vo는 LDC의 출력 전압인 것을 특징으로 하는 멀티 기능과 권선비를 갖는 OBC/LDC 통합형 회로.
10. The method of claim 4 or 9, when the LDC (Low Voltage DC/DC Converter) operation,
The input voltage range is 300 ~ 420V, and V p is stepped down to V s =V p *N s /N p through the transformer circuit part, and V o is adjusted to 24V through a voltage twice V s ,
Through the HB (Half Bridge)-FB (Full Bridge) converter, the first and second capacitors (C 1 ) (C 2 ) are maintained at V o /2=12V, the output voltage is maintained at 24V, and V p is Transformer primary electromotive force, V s is transformer secondary electromotive force, N p is the number of transformer primary windings, N s is the number of transformer secondary windings, and V o is the output voltage of the LDC. /LDC integrated circuit.
KR1020190150545A 2019-11-21 2019-11-21 Multi-Functional Multi-Ratio OBC/LDC Integrated circuit KR102325394B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020190150545A KR102325394B1 (en) 2019-11-21 2019-11-21 Multi-Functional Multi-Ratio OBC/LDC Integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020190150545A KR102325394B1 (en) 2019-11-21 2019-11-21 Multi-Functional Multi-Ratio OBC/LDC Integrated circuit

Publications (2)

Publication Number Publication Date
KR20210062781A KR20210062781A (en) 2021-06-01
KR102325394B1 true KR102325394B1 (en) 2021-11-12

Family

ID=76375815

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020190150545A KR102325394B1 (en) 2019-11-21 2019-11-21 Multi-Functional Multi-Ratio OBC/LDC Integrated circuit

Country Status (1)

Country Link
KR (1) KR102325394B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102601935B1 (en) * 2022-12-02 2023-11-14 (주)동락포스 Compact charging device for electric vehicles with 500KHz switching DC-DC converter

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4719567B2 (en) 2005-12-21 2011-07-06 日立オートモティブシステムズ株式会社 Bidirectional DC-DC converter and control method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100923331B1 (en) * 2007-04-13 2009-10-22 주식회사 윌링스 Utility-Interactive inverter system using high frequency transformer having variable voltage ratio
KR101903121B1 (en) 2016-05-23 2018-11-13 주식회사 이진스 OBC and LDC for electric vehicle
KR101959922B1 (en) 2016-09-07 2019-03-19 현대자동차주식회사 On board charger(OBC) control method and apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4719567B2 (en) 2005-12-21 2011-07-06 日立オートモティブシステムズ株式会社 Bidirectional DC-DC converter and control method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Hybrid Battery Charging System Combining OBC with LDC for Electric Vehicles, Seonghye Kim, Feel-soon Kang 2014 International Power Electronics Conference (2014.05.18. 공개)*
LLC Synchronous Rectification Using Resonant Capacitor Voltage, Jhih-Da Hsu 외4, IEEE TRAN. ON POWER ELECTRONICS (2019.02.20. 공개)*

Also Published As

Publication number Publication date
KR20210062781A (en) 2021-06-01

Similar Documents

Publication Publication Date Title
KR101971157B1 (en) A electric vehicle on-board charger with a high power capacity
US8901883B2 (en) Charger for electric vehicle
US20190023136A1 (en) Electric vehicle
JP2021151184A (en) Pre-chargeable dcdc conversion circuit
US10654371B2 (en) Charging apparatus for electric vehicle
KR102530939B1 (en) Power converting system for vehicle
US11355947B2 (en) Apparatus incorporating non-isolated charger and DC converter
KR102563663B1 (en) Charging apparatus for low voltage and high voltagedc-dc converter
Qian et al. Buck/half-bridge input-series two-stage converter
KR102325394B1 (en) Multi-Functional Multi-Ratio OBC/LDC Integrated circuit
Reddy et al. Novel wide voltage range multi-resonant bidirectional DC-DC converter
Kumar et al. Isolated three-port bidirectional DC-DC converter for electric vehicle applications
KR20210018598A (en) Electric power conversion system and control method therefor
Geethanjali et al. Testing and implementation of dual way DC-DC converter for electric vehicle power train system
KR20200062835A (en) Isolated bi-directional DC-DC converter charger for electric vehicles
KR102376932B1 (en) Integrated Power Conversion System for Electric Vehicle
US11351881B1 (en) Multi-functional multi-ratio OBC/LDC integrated circuit
CN113346755A (en) Vehicle-mounted isolated bidirectional DCDC converter
KR20230015171A (en) Charger capable of bidirectional power transfer
Gautam et al. An interleaved ZVS full-bridge DC-DC converter with capacitive output filter for a PHEV charger
CN112865519A (en) Bidirectional direct current DC-DC converter
CN113131768A (en) Control method of seven-in-one high-voltage integrated system of electric automobile
Vinusha et al. Improved power quality of single phase on-board charger with wide voltage conversion range
Pal et al. Power electronics—EV battery charging
CN217514984U (en) Driving and charging integrated circuit, charging and discharging integrated machine and electric automobile

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right