WO2011099704A2 - Electric vehicle driving system having a battery charging function - Google Patents

Electric vehicle driving system having a battery charging function Download PDF

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Publication number
WO2011099704A2
WO2011099704A2 PCT/KR2011/000481 KR2011000481W WO2011099704A2 WO 2011099704 A2 WO2011099704 A2 WO 2011099704A2 KR 2011000481 W KR2011000481 W KR 2011000481W WO 2011099704 A2 WO2011099704 A2 WO 2011099704A2
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Prior art keywords
power
electric vehicle
battery
bidirectional converter
output terminal
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PCT/KR2011/000481
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French (fr)
Korean (ko)
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WO2011099704A3 (en
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오용승
안강순
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주식회사 윌링스
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Publication of WO2011099704A2 publication Critical patent/WO2011099704A2/en
Publication of WO2011099704A3 publication Critical patent/WO2011099704A3/en

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    • 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
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • B60L53/10—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 the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • 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
    • 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

Definitions

  • the present invention relates to a driving system of an electric vehicle, and more particularly, a battery charging function is provided in the system itself so that the battery charging function does not have to be provided with a separate charger for charging the battery inside or outside the electric vehicle. It relates to a drive system of the electric vehicle provided.
  • Electric cars are cars that run on electricity, using batteries and motors, without using petroleum fuel.
  • FIG. 1 is a view showing a driving system of a conventional electric vehicle.
  • the conventional driving system 10 is provided in an electric vehicle, and includes a battery 11, a converter 12, an inverter 13, and a motor ( 14).
  • the battery 11 stores power
  • the converter 12 boosts the power of the battery 11 and supplies the power to the inverter 13, and the inverter 13 switches the boosted power.
  • the motor 14 rotates by supplying it to the motor 14.
  • the motor 14 is connected to the drive shaft of the electric vehicle to rotate to move the electric vehicle.
  • the conventional driving system 10 when charging the power to the battery 11, after rectifying the system power source, the charger 30 to charge the power to the battery 11 needed to be recharged .
  • the charger 30 may be provided inside or outside the electric vehicle, and is connected to an output terminal of the battery 11 to charge the system power source 20 with the battery 11.
  • the drive system 10 of the conventional electric vehicle has a disadvantage in that the manufacturing cost of the drive system 10 is increased because a separate charger for charging power to the battery 11 is provided, and the configuration becomes complicated. There is a problem.
  • the present inventors have tried to lower the manufacturing cost of the drive system of the electric vehicle and to simplify the configuration. As a result, the present inventors have developed a technical configuration capable of simply charging the battery by providing only a rectifier without a separate charger for charging the battery. Thus, the present invention has been completed.
  • an object of the present invention is to provide an electric vehicle driving system capable of charging a battery in a simple configuration without having to provide a separate charger for charging a battery in an electric vehicle driving system.
  • the present invention provides a battery for power supply, and an input terminal is connected to an output terminal of the battery.
  • a bidirectional converter connected to an output terminal of the bidirectional converter using a DC link, an inverter for outputting AC power for driving the following motor, and an electric motor including a motor that is connected to a drive shaft of an electric vehicle and receives and rotates the AC power Provides a drive system for a vehicle.
  • the output terminal is connected to the output terminal of the bidirectional converter, and further rectified by receiving an external system power, and further includes a rectifier for outputting the DC power to the bidirectional converter.
  • the output terminal of the rectifier and the connection of the inverter is cut off It further comprises a first relay.
  • DC link provided on the DC link, and further provided between the bi-directional converter and the first relay and a charging terminal for receiving the DC power.
  • it further comprises a system input terminal provided at the input terminal of the rectifier for receiving the system power.
  • it further comprises a second relay provided between the output terminal of the rectifier and the DC link, when the bidirectional converter supplies power to the inverter, the second relay for disconnecting the DC link and the rectifier.
  • the present invention has the following excellent effects.
  • the manufacturing cost of the system can be greatly reduced. It has an effect.
  • the inverter since the connection of the bidirectional converter and the inverter can be cut off when the battery is charged, the inverter can be safely protected.
  • FIG. 1 is a view showing a driving system of a conventional electric vehicle
  • FIG. 2 is a view showing a driving system of an electric vehicle according to an embodiment of the present invention.
  • FIG. 2 is a view showing a driving system of an electric vehicle according to an embodiment of the present invention.
  • the driving system 100 of an electric vehicle includes a battery 110, a bidirectional converter 120, an inverter 130, a motor 140, and a first relay 150. And a rectifier 160 and a second relay 170.
  • the battery 110 stores power capable of rotating the motor 140.
  • the bidirectional converter 120 has an input terminal connected to an output terminal of the battery 110 and boosts and outputs power stored in the battery.
  • the bidirectional converter 120 may be a variety of isolated or non-isolated converters known as DC-DC converters.
  • the bidirectional converter 120 may be a bidirectional buck-boost converter and may be flyback, half-bridge, full-bridge, or push. It may be provided with an isolated bidirectional converter configured in a push-full form.
  • the bidirectional converter 120 receives DC power as an output terminal to charge the battery with power.
  • the output terminal of the bidirectional converter 120 is provided with a charging terminal 122 for receiving the DC power.
  • the charging terminal 122 is a terminal for receiving a DC power output from the rectifier 160 when the rectifier 160 to be described below is not provided in the electric vehicle but provided outside.
  • the inverter 130 is connected to the bidirectional converter 120 using the DC link 121, and switches the power boosted by the bidirectional converter 120 to provide the motor 140.
  • the inverter 130 may be provided as a three-phase bridge inverter in which six switching elements are connected in a bridge form.
  • the motor 140 is rotated by the control of the inverter 130, the rotary shaft is connected to the drive shaft of the electric vehicle to move the electric vehicle.
  • the first relay 150 is provided in the DC link 121 and when the bidirectional converter 120 charges the battery 110, cuts off the connection between the bidirectional converter 120 and the inverter 130. To protect the inverter 130.
  • the first relay 150 serves to improve the stability of the system when charging the battery 110.
  • the rectifier 160 has an input terminal connected to the grid power supply 20 and an output terminal connected to the output terminal of the bidirectional converter 120.
  • the rectifier 160 rectifies the grid power supply 20 to perform the bidirectional operation. DC power is supplied to the converter 120.
  • the rectifier 160 may be provided outside the driving system 100 of the present invention.
  • the input terminal of the rectifier 160 is provided with a system power terminal 161 to be connected to the system power source 20.
  • the rectifier 160 is provided as a bridge diode in which four diodes are connected in a full bridge form.
  • the battery 110 can be charged using a simple bridge diode and the bidirectional converter 120 as compared to a charger 30 having a rectifier and a converter. It can be.
  • the second relay 170 is provided between the rectifier 160 and the bidirectional converter 120, and when the bidirectional converter 120 outputs power for the rotation of the motor 140, The rectifier 160 is protected by blocking the connection of the bidirectional converter 120.
  • the driving system of an electric vehicle may be utilized in a driving system of an electric vehicle and a hybrid vehicle, and may be applied to a driving system such as a bike driven by a motor as well as an automobile.

Abstract

The present invention relates to an electric vehicle driving system, and more particularly, an electric vehicle driving system having a built-in battery charging function, so as not to require a separate charger within or outside an electric vehicle to charge a battery.

Description

배터리 충전기능이 구비된 전기 자동차의 구동시스템Drive system of electric vehicle with battery charging function
본 발명은 전기 자동차의 구동시스템에 관한 것으로, 보다 구체적으로는 시스템 자체에 배터리 충전기능이 구비되어 전기 자동차의 내부 또는 외부에 배터리를 충전하기 위한 별도의 충전기를 구비할 필요가 없는 배터리 충전기능이 구비된 전기 자동차의 구동시스템에 관한 것이다.The present invention relates to a driving system of an electric vehicle, and more particularly, a battery charging function is provided in the system itself so that the battery charging function does not have to be provided with a separate charger for charging the battery inside or outside the electric vehicle. It relates to a drive system of the electric vehicle provided.
전기 자동차는 석유 연료를 사용하지 않고 배터리와 모터를 이용하여 전기를 이용하여 움직이는 자동차를 말한다.Electric cars are cars that run on electricity, using batteries and motors, without using petroleum fuel.
또한, 전기 자동차는 가솔린 자동차보다 먼저 제작되었으나 배터리의 중량, 충전 시간 등의 문제로 실용화되지 못하다가, 최근 기술이 발달함에 따라 배터리의 중량이 감소하고 충전 시간도 단축할 수 있는 배터리들이 개발되어 최근 연구가 활발하다.In addition, although electric vehicles were manufactured earlier than gasoline vehicles, they were not practically used due to problems such as weight and charging time of the battery. However, with the recent development of technology, batteries have been developed that can reduce the weight of the battery and shorten the charging time. The research is active.
또한, 전기 자동차는 매연이 없으며 환경파괴의 주범인 탄소를 배출하지 않기 때문에 최근 녹색산업의 성장에 발맞춰 매우 각광받고 있다.In addition, since electric vehicles are free of smoke and do not emit carbon, which is the main culprit of environmental destruction, they are in the spotlight recently in line with the growth of the green industry.
도 1은 종래의 전기 자동차의 구동시스템을 보여주는 도면이다.1 is a view showing a driving system of a conventional electric vehicle.
도 1을 참조하여 종래의 전기 자동차의 구동시스템(10)을 간단히 설명하면 종래의 구동시스템(10)은 전기 자동차에 구비되며, 배터리(11), 컨버터(12), 인버터(13) 및 모터(14)를 포함하여 이루어진다.Referring to FIG. 1, the driving system 10 of a conventional electric vehicle is briefly described. The conventional driving system 10 is provided in an electric vehicle, and includes a battery 11, a converter 12, an inverter 13, and a motor ( 14).
또한, 상기 배터리(11)는 전력을 저장하고, 상기 컨버터(12)는 상기 배터리(11)의 전력을 승압하며 상기 인버터(13)로 공급하며, 상기 인버터(13)는 상기 승압된 전력을 스위칭하여 상기 모터(14)로 공급함으로써 상기 모터(14)가 회전하게 한다.In addition, the battery 11 stores power, the converter 12 boosts the power of the battery 11 and supplies the power to the inverter 13, and the inverter 13 switches the boosted power. The motor 14 rotates by supplying it to the motor 14.
또한, 상기 모터(14)는 전기 자동차의 구동축과 연결되어 회전함으로써 전기 자동차가 움직이게 한다.In addition, the motor 14 is connected to the drive shaft of the electric vehicle to rotate to move the electric vehicle.
한편, 종래의 구동시스템(10)은 상기 배터리(11)에 전력을 충전할 때, 계통전원을 정류한 후, 전력을 강압하여 상기 배터리(11)에 충전할 수 있는 충전기(30)가 필요하였다.On the other hand, the conventional driving system 10, when charging the power to the battery 11, after rectifying the system power source, the charger 30 to charge the power to the battery 11 needed to be recharged .
또한, 상기 충전기(30)는 전기 자동차의 내부 또는 외부에 구비될 수 있으며, 상기 배터리(11)의 출력단에 연결되어, 계통전원(20)을 상기 배터리(11)로 충전하였다.In addition, the charger 30 may be provided inside or outside the electric vehicle, and is connected to an output terminal of the battery 11 to charge the system power source 20 with the battery 11.
즉, 종래의 전기 자동차의 구동시스템(10)은 상기 배터리(11)에 전력을 충전하기 위한 별도의 충전기가 구비되어야 하므로 구동시스템(10)의 제작단가가 상승하는 단점이 있고, 구성이 복잡해지는 문제점이 있다.That is, the drive system 10 of the conventional electric vehicle has a disadvantage in that the manufacturing cost of the drive system 10 is increased because a separate charger for charging power to the battery 11 is provided, and the configuration becomes complicated. There is a problem.
본 발명자들은 전기 자동차의 구동시스템의 제작 단가를 낮추고 구성을 단순화하고자 연구 노력한 결과, 배터리를 충전할 수 있는 별도의 충전기를 구비하지 않고 간단히 정류기만을 구비하여 배터리를 충전할 수 있는 기술적 구성을 개발하게 되어 본 발명을 완성하게 되었다.The present inventors have tried to lower the manufacturing cost of the drive system of the electric vehicle and to simplify the configuration. As a result, the present inventors have developed a technical configuration capable of simply charging the battery by providing only a rectifier without a separate charger for charging the battery. Thus, the present invention has been completed.
따라서, 본 발명의 목적은 전기 자동차의 구동시스템에 있어서, 배터리를 충전하기 위한 별도의 충전기를 구비할 필요가 없고, 간단한 구성으로 배터리를 충전할 수 있는 전기 자동차의 구동시스템을 제공하는 것이다.Accordingly, an object of the present invention is to provide an electric vehicle driving system capable of charging a battery in a simple configuration without having to provide a separate charger for charging a battery in an electric vehicle driving system.
본 발명의 목적들은 이상에서 언급한 목적들로 제한되지 않으며, 언급되지 않은 또 다른 목적들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.
상기의 목적을 달성하기 위하여 본 발명은 전력공급을 위한 배터리, 입력단이 상기 배터리의 출력단에 연결되며, 상기 배터리의 전력을 승압하여 하기 인버터로 공급하거나, 출력단으로 입력되는 직류전원을 상기 배터리에 충전하는 양방향 컨버터, DC링크를 이용하여 상기 양방향 컨버터의 출력단에 연결되며 하기 모터를 구동하기 위한 교류전력을 출력하는 인버터 및 전기자동차의 구동축과 연결되며 상기 교류전력을 입력받아 회전하는 모터를 포함하는 전기 자동차의 구동시스템을 제공한다.In order to achieve the above object, the present invention provides a battery for power supply, and an input terminal is connected to an output terminal of the battery. A bidirectional converter connected to an output terminal of the bidirectional converter using a DC link, an inverter for outputting AC power for driving the following motor, and an electric motor including a motor that is connected to a drive shaft of an electric vehicle and receives and rotates the AC power Provides a drive system for a vehicle.
바람직한 실시예에 있어서, 출력단이 상기 양방향 컨버터의 출력단에 연결되고, 외부의 계통전원을 입력받아 정류하며, 상기 양방향 컨버터로 상기 직류전원을 출력하는 정류기를 더 포함한다.In a preferred embodiment, the output terminal is connected to the output terminal of the bidirectional converter, and further rectified by receiving an external system power, and further includes a rectifier for outputting the DC power to the bidirectional converter.
바람직한 실시예에 있어서, 상기 DC링크에 구비되되, 상기 정류기의 출력단과 상기 인버터 사이에 구비되며, 상기 양방향 컨버터의 출력단으로 상기 직류전원이 입력될 때, 상기 정류기의 출력단과 상기 인버터의 연결을 차단하는 제1릴레이를 더 포함한다.In a preferred embodiment, provided on the DC link, provided between the output terminal of the rectifier and the inverter, when the DC power is input to the output terminal of the bidirectional converter, the output terminal of the rectifier and the connection of the inverter is cut off It further comprises a first relay.
바람직한 실시예에 있어서, 상기 DC링크에 구비되되, 상기 양방향 컨버터와 상기 제1릴레이 사이에 구비되고 상기 직류전원을 입력받기 위한 충전단자를 더 포함한다.In a preferred embodiment, provided on the DC link, and further provided between the bi-directional converter and the first relay and a charging terminal for receiving the DC power.
바람직한 실시예에 있어서, 상기 정류기의 입력단에 구비되고 상기 계통전원을 입력받기 위한 계통입력단자를 더 포함한다.In a preferred embodiment, it further comprises a system input terminal provided at the input terminal of the rectifier for receiving the system power.
바람직한 실시예에 있어서, 상기 정류기의 출력단과 상기 DC링크 사이에 구비되며, 상기 양방향 컨버터가 상기 인버터로 전력을 공급할 때, 상기 DC링크와 상기 정류기의 연결을 차단하는 제2릴레이를 더 포함한다.In a preferred embodiment, it further comprises a second relay provided between the output terminal of the rectifier and the DC link, when the bidirectional converter supplies power to the inverter, the second relay for disconnecting the DC link and the rectifier.
본 발명은 다음과 같은 우수한 효과를 가진다.The present invention has the following excellent effects.
먼저, 본 발명에 따른 전기 자동차의 구동시스템에 의하면 별도의 충전기가 필요없이 배터리의 전력을 승압하여 인버터로 공급하기 위한 양방향 컨버터를 이용하여 배터리를 충전할 수 있으므로 시스템의 제작단가를 매우 감소시킬 수 있는 효과가 있다.First, according to the driving system of an electric vehicle according to the present invention, since the battery can be charged using a bidirectional converter for boosting the power of the battery and supplying it to the inverter without a separate charger, the manufacturing cost of the system can be greatly reduced. It has an effect.
또한, 본 발명에 따른 전기 자동차의 구동시스템에 의하면 배터리를 충전할 때 상기 양방향 컨버터와 상기 인버터의 연결을 차단할 수 있으므로 상기 인버터를 안전하게 보호할 수 있다.In addition, according to the driving system of the electric vehicle according to the present invention, since the connection of the bidirectional converter and the inverter can be cut off when the battery is charged, the inverter can be safely protected.
도 1은 종래의 전기 자동차의 구동시스템을 보여주는 도면,1 is a view showing a driving system of a conventional electric vehicle,
도 2는 본 발명의 일 실시예에 따른 전기 자동차의 구동시스템을 보여주는 도면이다.2 is a view showing a driving system of an electric vehicle according to an embodiment of the present invention.
<부호의 설명><Description of the code>
100:전기 자동차의 구동시스템 110:배터리100: drive system of the electric vehicle 110: battery
120:양방향 컨버터 121:DC링크120: bidirectional converter 121: DC link
122:충전단자 130:인버터 122: charging terminal 130: inverter
140:모터 150:제1 릴레이140: motor 150: the first relay
160:정류기 161:계통입력단자160: rectifier 161: system input terminal
170:제2 릴레이170: the second relay
본 발명에서 사용되는 용어는 가능한 현재 널리 사용되는 일반적인 용어를 선택하였으나, 특정한 경우는 출원인이 임의로 선정한 용어도 있는데 이 경우에는 단순한 용어의 명칭이 아닌 발명의 상세한 설명 부분에 기재되거나 사용된 의미를 고려하여 그 의미가 파악되어야 할 것이다.The terms used in the present invention are selected as general terms as widely used as possible, but in some cases, the terms arbitrarily selected by the applicant, in which case, the meanings described or used in the detailed description of the present invention, rather than simply the names of the terms, are considered. The meaning should be grasped.
이하, 첨부한 도면에 도시된 바람직한 실시예들(첨부한 도면 및 바람직한 실시예들)을 참조하여 본 발명의 기술적 구성을 상세하게 설명한다.Hereinafter, with reference to the preferred embodiments (attached drawings and preferred embodiments) shown in the accompanying drawings will be described in detail the technical configuration of the present invention.
그러나, 본 발명은 여기서 설명되는 실시예에 한정되지 않고 다른 형태로 구체화 될 수도 있다. 명세서 전체에 걸쳐 동일한 참조번호는 동일한 구성요소를 나타낸다.However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Like numbers refer to like elements throughout the specification.
도 2는 본 발명의 일 실시예에 따른 전기 자동차의 구동시스템을 보여주는 도면이다.2 is a view showing a driving system of an electric vehicle according to an embodiment of the present invention.
도 2를 참조하면, 본 발명의 일 실시예에 따른 전기 자동차의 구동시스템(100)는 배터리(110), 양방향 컨버터(120), 인버터(130), 모터(140), 제1 릴레이(150), 정류기(160) 및 제2 릴레이(170)을 포함하여 이루어진다.2, the driving system 100 of an electric vehicle according to an embodiment of the present invention includes a battery 110, a bidirectional converter 120, an inverter 130, a motor 140, and a first relay 150. And a rectifier 160 and a second relay 170.
상기 배터리(110)는 상기 모터(140)를 회전시킬 수 있는 전력을 저장한다.The battery 110 stores power capable of rotating the motor 140.
상기 양방향 컨버터(120)는 입력단이 상기 배터리(110)의 출력단에 연결되고, 상기 배터리에 저장된 전력을 승압하여 출력한다.The bidirectional converter 120 has an input terminal connected to an output terminal of the battery 110 and boosts and outputs power stored in the battery.
또한, 상기 양방향 컨버터(120)는 DC-DC컨버터로써 공지된 다양한 절연 또는 비 절연 컨버터일 수 있다.In addition, the bidirectional converter 120 may be a variety of isolated or non-isolated converters known as DC-DC converters.
예를 들면, 상기 양방향 컨버터(120)는 양방향 벅-부스트(buck-boost) 컨버터일 수 있고, 플라이 백(flyback), 하프-브릿지(harf-bridge), 풀-브릿지(full-bridge) 또는 푸쉬-풀(push-full) 형태로 구성되는 절연형 양방향 컨버터로 구비될 수도 있다.For example, the bidirectional converter 120 may be a bidirectional buck-boost converter and may be flyback, half-bridge, full-bridge, or push. It may be provided with an isolated bidirectional converter configured in a push-full form.
또한, 상기 양방향 컨버터(120)는 출력단으로 직류전원을 입력받아 상기 배터리에 전력을 충전한다.In addition, the bidirectional converter 120 receives DC power as an output terminal to charge the battery with power.
또한, 상기 양방향 컨버터(120)의 출력단에는 상기 직류전원을 입력받기 위한 충전 단자(122)가 구비된다.In addition, the output terminal of the bidirectional converter 120 is provided with a charging terminal 122 for receiving the DC power.
또한, 상기 충전 단자(122)는 아래에서 설명할 정류기(160)가 전기 자동차에 구비되지 않고 외부에 구비될 경우 상기 정류기(160)에서 출력되는 직류전원을 입력받기 위한 단자이다.In addition, the charging terminal 122 is a terminal for receiving a DC power output from the rectifier 160 when the rectifier 160 to be described below is not provided in the electric vehicle but provided outside.
상기 인버터(130)는 DC링크(121)를 이용하여 상기 양방향 컨버터(120)와 연결되며, 상기 양방향 컨버터(120)에서 승압된 전력을 스위칭하여 상기 모터(140)로 제공한다.The inverter 130 is connected to the bidirectional converter 120 using the DC link 121, and switches the power boosted by the bidirectional converter 120 to provide the motor 140.
예를 들면, 상기 인버터(130)는 여섯 개의 스위칭 소자가 브릿지 형태로 연결되는 3상 브릿지 인버터로 구비될 수 있다.For example, the inverter 130 may be provided as a three-phase bridge inverter in which six switching elements are connected in a bridge form.
상기 모터(140)는 상기 인버터(130)의 제어에 의해 회전하고, 회전축이 전기 자동차의 구동축에 연결되어 전기 자동차가 움직이게 한다.The motor 140 is rotated by the control of the inverter 130, the rotary shaft is connected to the drive shaft of the electric vehicle to move the electric vehicle.
상기 제1 릴레이(150)는 상기 DC링크(121)에 구비되고 상기 양방향 컨버터(120)가 상기 배터리(110)를 충전할 때, 상기 양방향 컨버터(120)와 상기 인버터(130)의 연결을 차단하여 상기 인버터(130)를 보호한다.The first relay 150 is provided in the DC link 121 and when the bidirectional converter 120 charges the battery 110, cuts off the connection between the bidirectional converter 120 and the inverter 130. To protect the inverter 130.
즉, 상기 제1 릴레이(150)는 상기 배터리(110)를 충전할 때 시스템의 안정성을 향상시키는 역할을 한다.That is, the first relay 150 serves to improve the stability of the system when charging the battery 110.
상기 정류기(160)는 입력단이 계통전원(20)과 연결되고 출력단은 상기 양방향 컨버터(120)의 출력단에 연결되며, 상기 배터리(110)를 충전할 때, 계통전원(20)을 정류하여 상기 양방향 컨버터(120)로 직류전원을 공급한다.The rectifier 160 has an input terminal connected to the grid power supply 20 and an output terminal connected to the output terminal of the bidirectional converter 120. When charging the battery 110, the rectifier 160 rectifies the grid power supply 20 to perform the bidirectional operation. DC power is supplied to the converter 120.
또한, 상술한 바와 같이 상기 정류기(160)는 본 발명의 구동시스템(100)의 외부에 구비될 수도 있다.In addition, as described above, the rectifier 160 may be provided outside the driving system 100 of the present invention.
또한, 상기 정류기(160)의 입력단에는 상기 계통전원(20)과 연결될 계통전원단자(161)가 구비된다.In addition, the input terminal of the rectifier 160 is provided with a system power terminal 161 to be connected to the system power source 20.
또한, 상기 정류기(160)는 네 개의 다이오드가 풀 브릿지 형태로 연결되는 브릿지 다이오드로 구비된다.In addition, the rectifier 160 is provided as a bridge diode in which four diodes are connected in a full bridge form.
즉, 종래의 정류기 및 컨버터 등을 구비하는 충전기(30)에 비해 간단한 브릿지 다이오드와 상기 양방향 컨버터(120)를 이용하여 상기 배터리(110)를 충전할 수 있으므로 소자의 수를 줄여 제작단가를 매우 낮출 수 있는 것이다.That is, the battery 110 can be charged using a simple bridge diode and the bidirectional converter 120 as compared to a charger 30 having a rectifier and a converter. It can be.
상기 제2 릴레이(170)는 상기 정류기(160)와 상기 양방향 컨버터(120) 사이에 구비되며, 상기 양방향 컨버터(120)가 상기 모터(140)의 회전을 위한 전력을 출력할 때, 상기 정류기와 상기 양방향 컨버터(120)의 연결을 차단하여 상기 정류기(160)를 보호한다.The second relay 170 is provided between the rectifier 160 and the bidirectional converter 120, and when the bidirectional converter 120 outputs power for the rotation of the motor 140, The rectifier 160 is protected by blocking the connection of the bidirectional converter 120.
이상에서 살펴본 바와 같이 본 발명은 바람직한 실시예를 들어 도시하고 설명하였으나, 상기한 실시예에 한정되지 아니하며 본 발명의 정신을 벗어나지 않는 범위 내에서 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 의해 다양한 변경과 수정이 가능할 것이다.As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above-described embodiments, and is provided to those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.
본 발명의 일 실시예에 따른 전기 자동차의 구동시스템은 전기자동차, 하이브리드 자동차의 구동시스템에 활용이 가능하며, 자동차 뿐만아니라 모터로 구동되는 바이크등의 구동시스템에도 적용이 가능하다.The driving system of an electric vehicle according to an embodiment of the present invention may be utilized in a driving system of an electric vehicle and a hybrid vehicle, and may be applied to a driving system such as a bike driven by a motor as well as an automobile.

Claims (6)

  1. 전력공급을 위한 배터리;A battery for power supply;
    입력단이 상기 배터리의 출력단에 연결되며, 상기 배터리의 전력을 승압하여 하기 인버터로 공급하거나, 출력단으로 입력되는 직류전원을 상기 배터리에 충전하는 양방향 컨버터;A bidirectional converter having an input terminal connected to an output terminal of the battery and boosting the power of the battery and supplying the same to an inverter or charging a DC power input to the battery;
    DC링크를 이용하여 상기 양방향 컨버터의 출력단에 연결되며 하기 모터를 구동하기 위한 교류전력을 출력하는 인버터; 및An inverter connected to an output terminal of the bidirectional converter using a DC link and outputting AC power for driving a motor; And
    전기자동차의 구동축과 연결되며 상기 교류전력을 입력받아 회전하는 모터;를 포함하는 전기 자동차의 구동시스템.And a motor connected to the driving shaft of the electric vehicle and receiving and rotating the AC power.
  2. 제 1 항에 있어서,The method of claim 1,
    출력단이 상기 양방향 컨버터의 출력단에 연결되고, 외부의 계통전원을 입력받아 정류하며, 상기 양방향 컨버터로 상기 직류전원을 출력하는 정류기를 더 포함하는 것을 특징으로 하는 전지 자동차의 구동시스템.And an output terminal connected to an output terminal of the bidirectional converter, rectifying and receiving an external system power, and outputting the DC power to the bidirectional converter.
  3. 제 2 항에 있어서,The method of claim 2,
    상기 DC링크에 구비되되, 상기 정류기의 출력단과 상기 인버터 사이에 구비되며, 상기 양방향 컨버터의 출력단으로 상기 직류전원이 입력될 때, 상기 정류기의 출력단과 상기 인버터의 연결을 차단하는 제1릴레이를 더 포함하는 것을 특징으로 하는 전기 자동차의 구동시스템.Is provided in the DC link, provided between the output terminal of the rectifier and the inverter, when the DC power is input to the output terminal of the bidirectional converter, the first relay for blocking the connection of the output terminal of the rectifier and the inverter further A drive system for an electric vehicle, comprising:
  4. 제 3 항에 있어서,The method of claim 3, wherein
    상기 DC링크에 구비되되, 상기 양방향 컨버터와 상기 제1릴레이 사이에 구비되고 상기 직류전원을 입력받기 위한 충전단자를 더 포함하는 것을 특징으로 하는 전기 자동차의 구동시스템.The driving system of the electric vehicle provided on the DC link, further comprising a charging terminal provided between the bidirectional converter and the first relay for receiving the DC power.
  5. 제 2 항에 있어서,The method of claim 2,
    상기 정류기의 입력단에 구비되고 상기 계통전원을 입력받기 위한 계통입력단자를 더 포함하는 것을 특징으로 하는 전기 자동차의 구동시스템.And a system input terminal provided at an input terminal of the rectifier and configured to receive the system power.
  6. 제 2 항에 있어서,The method of claim 2,
    상기 정류기의 출력단과 상기 DC링크 사이에 구비되며, 상기 양방향 컨버터가 상기 인버터로 전력을 공급할 때, 상기 DC링크와 상기 정류기의 연결을 차단하는 제2릴레이를 더 포함하는 것을 특징으로 하는 전기 자동차의 구동시스템.And a second relay provided between the output terminal of the rectifier and the DC link, and disconnecting the connection between the DC link and the rectifier when the bidirectional converter supplies power to the inverter. Drive system.
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WO2011099704A3 (en) 2012-01-05

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