CN101254757A - 用于车辆的能量分配系统 - Google Patents
用于车辆的能量分配系统 Download PDFInfo
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
- B60L7/16—Dynamic electric regenerative braking for vehicles comprising converters between the power source and the motor
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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
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/15—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines with additional electric power supply
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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
- B60L2210/00—Converter types
- B60L2210/20—AC to AC converters
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- 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
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- 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
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- 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
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- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
Abstract
本发明涉及用于车辆的能量分配系统。一种配电系统,其被配置为有助于在能源与负载之间传递能量。该配电系统可配置为或另外地适合于在驱动该负载时将DC能量转换为AC能量,以及在对该能源重新充电时将AC能量转换为DC能量。
Description
发明背景
1.发明领域
本发明涉及一种适合与车辆一起使用的能量分配系统,例如但不限于电力可驱动的车辆。
2.背景技术
混合动力电动车(HEV)和电动车(EV)包含部分地和/或完全地由于电能的作用来驱动车辆的能力。典型地,电能由高压电源提供给发动机或其它电可操作的组件,以便以驱动或另外地移动车辆的方式来开动发动机。
附图说明
在随附的权利要求中详细指出了本发明。然而,通过结合附图参考下列详细描述,本发明的其它特征会变得更明显,并且本发明会被最好地理解,其中:
图1示出了根据本发明的一个非限制性方面的电驱动系统;
图2示出了根据本发明的一个非限制性方面的配电系统的特征;
图3示出了根据本发明的一个非限制性方面的逆变器(inverter)和变换器(converter);和
图4-6示出了根据本发明的一个非限制性方面的附加的逆变器和变换器。
具体实施方式
图1示出了根据本发明的一个非限制性方面的电驱动系统10。驱动系统10可配置为或另外地适合于用在HEV或EV中,以支持基于电的操作,例如但不限于与驱动电力发动机或负载有关的操作。该系统通常包括高压电池/能源12,其用于将高压能量提供给与车辆有关的电负载16。
出于示例性的目的,且不旨在限制本发明的范围和意图,负载16主要是关于作为适合于驱动车辆的电力发动机而被描述的。然而,本发明并不旨在如此限制,而是完全地将负载16设想为AC电源设备,不论其被包括在车辆上和/或另外地连接到车辆上。
可包括配电系统14,以有助于在能源12与负载16,以及可选地连接到其上的其它设备和网络之间传递能量。配电系统14可被配置为或另外地适合于在驱动负载时将DC能量转换为AC能量,并且在对电池重新充电时将AC能量转换为DC能量。以这种方式,配电系统14可作为能够转换相对高的电压的双向逆变器,以便容易从家用墙壁电源插座或其它电源给所述能源充电。
图2示出了根据本发明的一个非限制性方面的配电系统14的特征。这些特征可包括输入滤波器20、DC/AC逆变器22、AC/AC变换器24和输出滤波器26。滤波器可配置为滤除噪声和其它来自所传递的能量的变量。逆变器22和变换器24可以被配置和相应地用控制器或其它部件(没有显示)控制,以有助于期望的转换过程,也就是说,转换能量以有助于给AC负载供能和/或有助于给电池充电。
关于依赖于连接到DC/AC变换器的DC/DC的系统,DC/AC逆变器22和AC/AC变换器24的组合被认为是获取低的总谐波阈值(total harmonicthreshold,THD)的高电压AC输出的有效方式。DC/DC DC/AC级逆变器的输出滤波器往往体积大,这是因为功率因数校正采用主要是扼流圈(choke)和电力电容器的无源元件实现。当使用本发明的AC/AC变换器时,可以以有源方式进行功率因数校正,从而减少输出滤波器组件的大小、重量和成本。
图3示出了根据本发明的一个非限制性方面的逆变器22和变换器24。逆变器22和变换器24可彼此连接以提供集成的结构。逆变器22可构造为全桥逆变器,变换器24可构造为全桥变换器。逆变器22和变换器24的这些特殊结构被认为提供了优于其它装置,如半桥变换器30(图4)、推挽式逆变器32(图5)、半桥逆变器34(图6)的性能。然而,本发明并不旨在如此限制,而是充分考虑使用这些其它结构中的任意一个。
关于半桥逆变器(图4),尽管设计仅需要两个功率MOSFET(M1和M2),但是与全桥变换器相比,需要两个额外的电力电容(Cp1和Cp2)。此外,因为电流诱发(solicitation in current)较高,所以相对于半桥逆变器的较小的相应部件来说,MOSFET和变压器必须是尺寸特别大的。这些差别增大了系统的尺寸、重量和成本。而且,由于MOSFET中的电流应力较高,所以该功率MOSFET比全桥变换器的MOSFET消耗更多的能量。后者增大了半导体中的损耗且产生热点,这些非常难以控制,因此使得所需的冷却台更加昂贵并且难以进行设计来清除这种能量损耗。由于半导体必须承受两倍的DC/AC逆变器的输入电流的事实,而这可能会导致使用不常见且昂贵的功率MOSFET,因此进一步加重了成本增加。
推挽式逆变器(图5)比半桥逆变器更不适用,这是因为半导体必须承受两倍的DC/AC逆变器的输出电流,而这可能会导致使用不常见且昂贵的功率MOSFET(M1和M2)。此外,由于初级变压器的分接,在初级功率MOSFET两端存在由于初级绕组的泄漏电感产生的电流/电压的峰值。因此,为了防止这个电压峰值的产生,可能需要缓冲器,而由于缓冲器的存在就使得设计更加复杂、更大、更重并且更加昂贵。
因此本发明一个方面的全桥逆变器(图3)22的配置被选作解决方案,这是因为它使用标准的功率MOSFET(M1-M4)并且因为它使用未分接的初级绕组(L1)以及没有缓冲器。此外,因为全桥可用作ZVT(零电压转换),由此当开关两端的电压为0时,接通功率MOSFET(M1-M4)的开关,使损耗减到最少,因此使本发明的4开关应用得以实现。这项功能对半桥逆变器和推挽式逆变器不可行,这是因为只使用了2个功率开关。
再来谈谈变换器,对于单向操作,半桥AC/AC变换器(图6)可由两个开关(Q1,Q4)和两个二极管(D1,D3)组成。如果需要双向逆变器/电池充电器,那么可使用两个上部开关(Q1,Q2)和两个上部二极管(D1,D2)以及两个下部开关(Q3,Q4)和两个下部二极管(D3,D4)。
图2-3中描绘的配电系统14由DC/AC逆变器22和AC/AC变换器24组成。DC/AC级可配置为由四个功率MOSFET(M1-M4)和与四个功率MOSFET中的每个并联的四个二极管(D1-D4)组成的全桥逆变器。单向全桥AC/AC变换器可由一个右上和左上开关(Q1,Q5)和一个左上和右上二极管(D1,D5)以及一个左下和右下开关(Q3,Q7)和一个左下和右下二极管(D3,D7)组成。如果需要双向逆变器/电池充电器,那么可使用两个左上和右上开关(Q1,Q2,Q5,Q6)和两个左上和右上二极管(D1,D2,D5,D6)以及两个左下和右下开关(Q3,Q4,Q7,Q8)和两个左下和右下二极管(D3,D4,D7,D8)。变换器可在输出处包括由两个电感(L3和L4)和电容C2组成的共模滤波器,其中两个电感可以耦合或不耦合并且电容C2与负载并联。
与全桥DC/AC变换器比较,半桥变换器可能需要分接的次级绕组,使其结构制造起来更加复杂并且产生泄漏电感。为了最小化DC/AC设计中泄漏电感的众所周知的不良效应,必须使用复杂的平面变压器和缓冲器以最小化横跨功率IGBT的尖峰信号。此外,由于半导体必须承受两倍的DC/AC逆变器的输入电流,这可能会导致使用不常见且昂贵的功率MOSFET,这就可能进一步加重了成本增加。
如所需要的,这里公开了本发明的详细的实施例;然而,应理解,所公开的实施例仅是本发明的示例,本发明可以不同和可选的形式体现。图形不必按比例绘制,某些部件可被放大或缩小以显示特定元件的细节。因此,这里公开的具体的结构和功能细节不应被解释为限制性的,而仅是作为权利要求的代表性基础和/或作为教导本领域的技术人员的代表性基础,以不同地使用本发明。
尽管已经示出和描述了本发明的实施例,但是并不旨在这些实施例显示和描述本发明的所有可能的形式。更确切地说,说明书中使用的词语是描述性而不是限制性的词语,且应理解,可进行各种变化且不背离本发明的精神和范围。
Claims (20)
1.一种配电系统,其用于转换在车辆电池和车辆负载之间传递的能量,所述系统包括:
DC/AC逆变器,其与所述电池电连通,所述逆变器被配置为将DC能量转换为AC能量;和
AC/AC变换器,其与所述逆变器和车辆负载电连通,所述变换器被配置为变换来自所述逆变器的所述AC能量输出,以用于到所述车辆负载的输出。
2.如权利要求1所述的系统,其中所述逆变器直接连接到所述变换器。
3.如权利要求1所述的系统,其中所述逆变器是全桥逆变器。
4.如权利要求3所述的系统,其中所述全桥逆变器包括四个开关。
5.如权利要求1所述的系统,其中所述变换器是全桥变换器。
6.如权利要求5所述的系统,其中所述全桥变换器包括有助于单向操作的两个开关。
7.如权利要求5所述的系统,其中所述全桥变换器包括有助于双向操作的四个开关。
8.如权利要求1所述的系统,其中所述变换器是全桥变换器且所述逆变器是全桥逆变器。
9.如权利要求1所述的系统,其中所述车辆负载是电力发动机,所述电力发动机被配置为由于所述变换器的所述AC能量输出的作用而驱动所述车辆。
10.如权利要求9所述的系统,其中所述发动机、变换器和逆变器为双向的,以便有助于用来自所述发动机的能量对所述电池充电。
11.如权利要求1所述的系统,其中所述负载通过包括在所述车辆上的插头连接到所述变换器,所述负载是与所述车辆相分离的。
12.如权利要求1所述的系统,其中所述变换器和逆变器为双向的,以便有助于用来自连接到车辆插头的家用墙壁电源插座的能量对所述电池充电。
13.如权利要求1所述的系统,其进一步包括用于对所述DC能量进行滤波的输入滤波器和用于对从所述变换器输出的所述AC能量进行滤波的的输出滤波器。
14.如权利要求1所述的系统,其进一步包括连接在所述变换器和所述车辆负载之间的共模输出滤波器。
15.如权利要求14所述的系统,其中在所述车辆电池与逆变器之间连接有共模滤波器。
16.如权利要求15所述的系统,其中所述滤波器、逆变器和变换器是通过接线盒而被包括在所述系统内的。
17.一种配电系统,其用于转换在车辆电池与车辆负载之间传递的能量,所述系统包括:
全桥DC/AC逆变器,其与所述电池电连通,所述逆变器被配置为将DC能量转化为AC能量;和
全桥AC/AC变换器,其与所述逆变器和车辆负载电连通,所述变换器被配置为变换来自所述逆变器的所述AC能量输出,以用于到所述车辆负载的输出。
18.一种配电系统,其用于转换在车辆电池与车辆负载之间传递的能量,所述系统包括:
DC/AC逆变器,其与所述电池电连通,所述逆变器被配置为将DC能量转化为AC能量;
AC/AC变换器,其与所述逆变器和车辆负载电连通,所述变换器被配置为变换来自所述逆变器的所述AC能量输出,以用于到所述车辆负载的输出;和
其中所述变换器和逆变器是双向的,以便有助于用来自连接到车辆插头的家用墙壁电源插座的能量和来自用于驱动所述车辆的电力发动机的能量给所述电池充电。
19.如权利要求18所述的系统,其中所述逆变器是全桥逆变器。
20.如权利要求18所述的系统,其中所述变换器是全桥逆变器。
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