CN112172509A - 四轮驱动车辆 - Google Patents
四轮驱动车辆 Download PDFInfo
- Publication number
- CN112172509A CN112172509A CN201911219526.8A CN201911219526A CN112172509A CN 112172509 A CN112172509 A CN 112172509A CN 201911219526 A CN201911219526 A CN 201911219526A CN 112172509 A CN112172509 A CN 112172509A
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- Prior art keywords
- switching element
- input
- output port
- battery
- power
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 78
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
- B60L53/24—Using the vehicle's propulsion converter for charging
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Abstract
一种四轮驱动车辆,包括:主驱动轮和辅助驱动轮;第一驱动电机,向主驱动轮提供动力;第二驱动电机,向辅助驱动轮提供动力;电池,储存电能;逆变器,对储存在电池中的电能进行转换并提供给第一驱动电机;以及双向功率转换器,通过转换从车辆外部供应的功率来生成用于对电池充电的充电电力,并对储存在电池中的电能进行转换并提供给第二驱动电机。
Description
技术领域
本公开涉及一种四轮驱动车辆。
背景技术
这部分的陈述仅提供与本公开相关的背景信息,并且可能不构成现有技术。
通常,四轮驱动车辆是通过向车辆的所有前轮和后轮供电来驱动的车辆。特别地,全轮驱动(AWD)车辆总是将动力传递给四个车轮,同时考虑到抓地力和车轮的转数将动力适当地分配给车轮,从而提高车轮的抓地力并实现稳定行驶。
最近,环保车辆(特别是电动车辆)配备有驱动电机,以便选择性地驱动前轮或后轮作为主驱动轮,并驱动未选择的驱动轮作为辅助驱动轮。驱动电机将电能转换成机械旋转能,电力被分别供应给主驱动轮的驱动电机和辅助驱动轮的驱动电机。特别地,这些驱动电机配备有逆变器,逆变器转换存储在电池中的DC能量,并分别将其提供给驱动电机。此外,电动车辆必须配备车载充电器(OBC),用于对电池进行充电,该电池从外部充电设施提供给驱动电机的电能。
我们已经发现,由于包括四轮驱动系统(特别是AWD系统)的电动车辆必须配备几个驱动电机、逆变器和充电器,因此该系统很复杂,并且因此大大增加了车辆的制造成本。
以上作为本公开的相关技术提供的描述仅仅是为了帮助理解本公开的背景,不应被解释为包括在本领域技术人员已知的相关技术中。
发明内容
因此,本公开提供了一种电动四轮驱动车辆,其中,可以通过将四轮驱动系统中的一些部件的功能相乘来简化系统结构。
鉴于一个方面,根据本公开的四轮驱动车辆可以包括:主驱动轮和辅助驱动轮;第一驱动电机,向主驱动轮提供动力;第二驱动电机,向辅助驱动轮提供动力;电池,储存电能;逆变器,对储存在电池中的电能进行转换并提供给第一驱动电机;以及双向功率转换器,通过转换从车辆外部供应的功率来生成用于对电池充电的充电电力,并对储存在电池中的电能进行转换并提供给第二驱动电机。
在本公开的实施方式中,第二驱动电机的额定功率可以小于第一驱动电机的额定功率。
在本公开的实施方式中,四轮驱动车辆还可以包括:第一开关元件,其连接在双向功率转换器和充电入口之间,该充电入口被配置为供应外部充电电力;以及第二开关元件,设置在双向功率转换器和第二驱动电机之间。
在本公开的实施方式中,当通过充电入口施加外部充电电力或者通过充电入口输出电池电力时,所述第一开关元件可以短路并且所述第二开关元件可以断开,并且当驱动四轮驱动车辆时,第一开关元件可以断开并且第二开关元件可以短路。
在本公开的实施方式中,双向功率转换器可以包括:双向功率因数校正电路,连接到第二驱动电机和充电入口,充电入口被配置为提供外部充电电力;以及双向DC-DC转换器,连接在双向功率因数校正电路和电池之间。
在本公开的实施方式中,双向功率因数校正电路可以包括:第一输入/输出端口,选择性地连接到充电入口或第二驱动电机;第二输入/输出端口,连接到双向DC-DC转换器;升压电感器电路,包括分别连接到第一输入/输出端口的端子的多个升压电感器;以及开关电路,包括连接到升压电感器电路的多个开关元件。
在本公开的实施方式中,第一输入/输出端口可以具有三个端子,并且多个升压电感器可以包括分别连接到所述第一输入/输出端口的三个端子的第一升压电感器、第二升压电感器和第三升压电感器;第二输入/输出端口可以具有两个端子,并且开关电路可以包括在第二输入/输出端口的两个端子之间彼此串联连接的第一开关元件和第二开关元件、在第二输入/输出端口的两个端子之间彼此串联连接的第三开关元件和第四开关元件以及在第二输入/输出端口的两个端子之间彼此串联连接的第五开关元件和第六开关元件;并且所述第一升压电感器的第二端可以连接到第一开关元件和第二开关元件的连接节点,所述第二升压电感器的第二端可以连接到第三开关元件和第四开关元件的连接节点,所述第三升压电感器的第二端可以连接到第五开关元件和第六开关元件的连接节点。
在本公开的实施方式中,当具有不同相位的三相AC电流分别从充电入口输入到第一输入/输出端口的端子并且电池充电时,第一升压电感器、第一开关元件和第二开关元件可以形成第一升压电路,第二升压电感器、第三开关元件和第四开关元件可以形成第二升压电路,并且第三升压电感器、第五开关元件和第六开关元件可以形成第三升压电路,使得具有不同相位的AC电力可以以提高的功率因数输出到第二输入/输出端口。
在本公开的实施方式中,当驱动电流提供给第二驱动电机或者电池的电力被转换然后被提供到充电入口时,所述开关电路可以作为逆变器操作。
在本公开的实施方式中,双向功率因数校正电路还可以包括额外输入/输出端口,额外输入/输出端口具有连接到第一开关元件和第二开关元件的端子、连接到第三开关元件和第四开关元件的端子以及连接到第五开关元件和第六开关元件的端子,并且额外输入/输出端口可以连接到第二驱动电机。
在本公开的实施方式中,四轮驱动车辆还可以包括连接在第一输入/输出端口和充电入口之间的第一开关元件和连接在额外输入/输出端口和第二驱动电机之间的第二开关元件。
在本公开的实施方式中,当通过充电入口施加外部充电电力或者通过充电入口输出电池的电力时,第一开关元件可以短路并且所述第二开关元件可以断开,并且当驱动四轮驱动车辆时,所述第一开关元件可以断开并且所述第二开关元件可以短路。
在本公开的实施方式中,双向DC-DC转换器可以包括:第一输入/输出端口,连接到双向功率因数校正电路;变压器,包括形成互感的第一线圈和第二线圈;第一开关电路,连接在第一输入/输出端口和变压器的第一线圈之间;第二输入/输出端口,连接到电池;以及第二开关电路,连接在第二输入/输出端口和变压器的第二线圈之间。
在本公开的实施方式中,当对电池充电时,第一开关电路可以将施加到第一输入/输出端口的DC电压转换成AC电压,然后可以将AC电压施加到变压器的第一线圈,并且所述第二开关电路可以将感应到变压器的第二线圈的AC电压转换成DC电压,然后可以将DC电压施加到第二输入/输出端口。
在本公开的实施方式中,当驱动电流提供给第二驱动电机或者电池的电力被转换然后被提供到充电入口时,第二开关电路可以将施加到第二输入/输出端口的电池的DC电压转换成AC电压,然后可以将AC电压施加到变压器的第二线圈,并且所述第一开关电路可以将感应到变压器的第一线圈的AC电压转换成DC电压,然后可以将DC电压施加到第一输入/输出端口。
在本公开的实施方式中,双向DC-DC转换器还可以包括第一开关元件和第二开关元件,第一开关元件和第二开关元件使变压器中的第一线圈和第二线圈中的每一个的两端电断开或短路,其中,当对电池充电时,第一开关元件和所述第二开关元件可以断开,并且当驱动电流被提供给第二驱动电机或者电池的电力被转换然后被提供给充电入口时,所述第一开关元件和所述第二开关元件可以短路。
在本公开的实施方式中,所述双向DC-DC转换器可以包括:第一输入/输出端口,连接到双向功率因数校正电路;第二输入/输出端口,连接到电池;第一开关元件,第一端连接到第一输入/输出端口的第一端子;电感器,两端分别连接到第一开关元件的第二端和第二输入/输出端口的第一端;以及第二开关元件,第一端连接到第一开关元件和电感器的连接节点,以及第二端共同连接到第一输入/输出端口的第二端子和第二输入/输出端口的第二端子。
在本公开的实施方式中,当对电池充电时,可以控制第一开关元件的占空比,使得第一输入/输出端口的电压可以升高,使得能够对电池充电的充电电压可以被输出到第二输入/输出端口。
在本公开的实施方式中,当驱动电流被提供给第二驱动电机或者电池的电力被转换然后被提供到充电入口时,可以控制所述第二开关元件的占空比,使得电池的电压升高并输出到第一输入/输出端口,或者所述第一开关元件短路并且所述第二开关元件断开,使得电池的电压未改变地施加到第一输入/输出端口。
根据四轮驱动车辆,由于四轮驱动车辆包括双向功率转换器,该双向功率转换器在车辆行驶时将储存在电池中的电力进行转换并提供给驱动电机,在对电池充电时,转换并提供从外部充电设施提供的电力,因此可以减少部件的数量,从而能够简化四轮驱动系统并提高竞争力。
本公开的效果不限于上述效果,本领域技术人员可以从以下描述中清楚地理解其他效果。
从本文提供的描述中,进一步的应用领域将变得显而易见。应该理解的是,描述和具体示例仅仅是为了说明的目的,而不是为了限制本公开的范围。
附图说明
为了更好地理解本公开,现在将参考附图以示例的方式描述其各种形式,其中:
图1是示出根据本公开的实施方式的四轮驱动车辆的构造的框图;
图2是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器的构造的框图;
图3是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向功率因数校正电路的电路图;
图4是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向DC-DC转换器的示例的电路图;以及
图5是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向DC-DC转换器的另一示例的电路图。
本文描述的附图仅用于说明的目的,并非旨在以任何方式限制本公开的范围。
具体实施方式
以下描述本质上仅仅是示例性的,并非旨在限制本公开、应用或用途。应当理解,在所有附图中,相应的附图标记表示相似或相应的部件和特征。
在下文中,将参考附图详细描述根据本公开的各种实施方式的四轮驱动车辆。
图1是示出根据本公开的实施方式的四轮驱动车辆的构造的框图。
参考图1,四轮驱动车辆10可以包括:主驱动轮16和辅助驱动轮17;第一驱动电机12,向主驱动轮16提供动力;第二驱动电机14,向辅助驱动轮17提供动力;电池11,储存电能;逆变器13,对储存在电池11中的电能进行转换并提供给第一驱动电机12;以及双向功率转换器15,通过转换从车辆外部供应的功率来生成用于对电池11充电的充电电力,对存储在电池11中的电能进行转换并提供给第二驱动电机14。
主驱动轮16可以是由用于驱动车辆的动力中较大动力驱动的车轮,而辅助驱动轮17可以是由用于驱动车辆的动力中较小动力驱动的车轮。
在实际车辆中,主驱动轮16和辅助驱动轮17可以是车辆的前轮或后轮。例如,在基于前轮的四轮驱动车辆中,前轮可以是主驱动轮16,后轮可以是辅助驱动轮17。作为另一示例,在基于后轮的四轮驱动车辆中,后轮可以是主驱动轮16,前轮可以是辅助驱动轮17。
驱动轮16和17可以分别由来自驱动电机12和14的动力旋转。为了便于描述,将向主驱动轮16供应动力的驱动电机12称为第一驱动电机,将向辅助驱动轮17供应动力的驱动电机14称为第二驱动电机。
第一驱动电机12和第二驱动电机14是用于分别向驱动轮提供能够驱动车辆的动力的旋转机电设备,可以是本领域中已知的各种类型的驱动电机。例如,驱动电机可以是同步电机,包括:定子,该定子包括多个线圈,该多个线圈使用单独供应的多相(3相)AC电力产生磁通量;以及具有永磁体的转子。
AWD系统防止行驶过程中转向不足和转向过度,并且与连接到主驱动轮的第一驱动电机12相比,连接到用于逃离雪地道路的辅助驱动轮的第二驱动电机14即使通过使用1/9至1/4的小功率也可以确保足够的适合于期望用途的性能。因此,第二驱动电机14可以是额定功率小于第一驱动电机12的电机。
主驱动轮16和辅助驱动轮17之间的动力分配可以通过使用设置在车辆中的控制器100(例如,车辆控制单元(VCU))控制第一驱动电机12和第二驱动电机14的功率(扭矩)来实现。第一驱动电机12和第二驱动电机14的功率控制可以通过分别向驱动电机供应驱动电流的电功率转换器13和15来实现。
输出大功率的第一驱动电机12的功率可以通过使用控制器100控制逆变器13来确定,逆变器13将存储在电池11中的能量转换成三相AC电力并将三相AC电力提供给驱动电机12。
逆变器13是包括多个开关元件的电功率转换器,并且开关元件可以被脉宽调制,使得对应于车辆期望的目标扭矩的驱动电流可以提供给第一驱动电机12。控制逆变器13使得车辆中使用的驱动电机能够输出所要求的扭矩的各种方法在本领域中是已知的,因此不再进一步描述控制逆变器13的方法。
可以向与第一驱动电机12相比输出较小功率的第二驱动电机14提供由双向功率转换器15从电池11的电力转换而来的三相AC电力。
双向功率转换器15可以作为车载充电器操作,当车辆被驱动时,该车载充电器将电池11的电力转换成三相电力,并且将三相电力供应给第二驱动电机14,当对电池11充电时,该车载充电器通过转换通过车辆的充电入口18提供的外部充电设施的电力来生成能够对电池11充电的充电电力。因此,双向功率转换器15可以称为双向OBC。
双向功率转换器15是能够执行双向供电的设备,其中,当驱动第二驱动电机14时,电力从电池11传输到第二驱动电机14,在充电期间,电力被传输到电池11。
图2是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器的构造的框图。
参考图2,四轮驱动车辆的双向功率转换器15可以包括双向功率因数校正电路151和双向DC-DC转换器152。
功率因数校正电路151可以通过公共升压电路的拓扑来实现,该公共升压电路的拓扑用于增加AC电流的功率因数,并且当电池11被从充电入口18供应的外部充电设施的系统电力充电时,向电池11提供AC电流。
此外,当驱动电流供应给第二驱动电机14时,双向PFC电路151可以将从电池11提供的DC电力转换成三相AC电力。此外,双向PFC电路151还可以在实施将存储在车辆的电池11中的电力供应给外部系统的车辆到电网(V2G)的过程中,将从电池11提供的DC电力转换成三相AC电力。
当电池11由从充电入口18供应的外部充电设施的系统电力充电时,双向DC-DC转换器152可以将双向PFC电路151的输出电压的幅度改变为可以对电池11充电的电压的幅度,并且可以将该电压施加到电池11。
此外,当将驱动电流供应给第二驱动电机14时,双向DC-DC转换器152可以在改变DC电压的幅度或旁路DC电压之后,将从电池11输出的DC电压提供给双向PFC电路151。此外,双向DC-DC转换器152还可以在实施将存储在车辆的电池11中的电力提供给外部系统的车辆到电网(V2G)的过程中,在改变DC电压的幅度或旁路DC电压之后,将从电池11输出的DC电压供应给双向PFC电路151。
根据本公开的实施方式的四轮驱动车辆可以包括开关单元191和192,用于根据双向功率转换器15的使用来确定供电路径。例如,当电池11被充电或实现V2G时,连接在车辆的充电入口18和双向PFC电路151之间的开关元件191可以短路,并且连接在第二驱动电机14和双向PFC电路151之间的开关元件192可以断开。此外,当驱动第二驱动电机14时,连接在车辆的充电入口18和双向PFC电路151之间的开关元件191可以断开,并且连接在第二驱动电机14和双向PFC电路151之间的开关元件192可以短路。
图3是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向功率因数校正电路的电路图。
参考图3,四轮驱动车辆的双向功率转换器中的双向功率因数校正电路可以包括:连接到充电入口18或第二驱动电机14的第一输入/输出端口T11;连接到双向DC-DC转换器152的第二输入/输出端口T2;升压电感器电路21,包括多个升压电感器L1、L2、L3,并且设置在第一输入/输出端口T11和第二输入/输出端口T12之间;以及开关电路23,包括开关元件S1~S6。
第一输入/输出端口T11可以具有三个端子,升压电感器L1、L2和L3的第一端可以分别连接到这些端子。开关电路23可以包括在具有两个端子的第二输入/输出端口T2的两个端子之间彼此串联连接的第一开关元件S1和第二开关元件S2、在第二输入/输出端口T2的两个端子之间彼此串联连接的第三开关元件S3和第四开关元件S4、以及在第二输入/输出端口T2的两个端子之间彼此串联连接的第五开关元件S5和第六开关元件S6。升压电感器L1、L2和L3的第二端可以分别连接到第一开关元件S1和第二开关元件S2的连接节点、第三开关元件S3和第四开关元件S4的连接节点以及第五开关元件S5和第六开关元件S6的连接节点。
当具有不同相位的三相AC电流分别从充电入口18输入到第一输入端口T11的端子并且对电池11充电时,输入到第一输入/输出端口T11的电力以由升压电感器电路21和开关电路23形成的升压电路校正的功率因数输出到第二输入/输出端口T2。
即,第一升压电感器L1、第一开关元件S1和第二开关元件S2形成一个升压电路,第二升压电感器L2、第三开关元件S3和第四开关元件S4形成另一升压电路,并且第三升压电感器L3、第五开关元件S5和第六开关元件S6形成另一升压电路,由此可以以提高(improved,改善)的功率因数向第二输入/输出端口T2输出具有不同相位的AC电力。
通过在第二输入/输出端口T2的两个端子之间连接DC链路电容器(图2中的Cdc),可以在双向DC-DC转换器152的输入/输出端口生成DC电压。
同时,当将驱动电流供应给第二驱动电机14或者电池11的电力被转换然后被提供到充电入口18以实现V2G时,开关电路23可以操作,以将施加到第二输入/输出端口T2的DC电力转换成输出到第一输入/输出端口T11的每个端子的三相AC电力。即,当开关元件23与逆变器相同地操作时,从电池11的DC电力转换成的三相AC电力可以提供给第一输入/输出端口T11。开关电路23的这种操作可以由控制器100控制。
开关单元191可以设置在第一输入/输出端口T11和充电入口18之间,并且开关单元192可以设置在第一输入/输出端口T11和第二驱动电机14之间。开关单元191和192的短路或断开状态也可以通过控制器10的控制来确定,从而可以适当地形成供电路径。
同时,可以选择性地提供额外输入/输出端口T12,额外输入/输出端口T12直接连接到开关电路23中串联连接的开关元件的连接节点。在添加额外输入/输出端口T12的实施方式中,额外输入/输出端口T12可以直接连接到第二驱动电机14。当提供额外输入/输出端口T12时,开关单元191可以设置在第一输入/输出端口T11和充电入口18之间,并且开关单元192可以设置在额外输入/输出端口T12和第二驱动电机14之间。
尽管图中未示出,但用于去除系统电力失真的EMI滤波器等可以设置在第一输入/输出端口T11和升压电感器电路21之间。即,当对电池11充电时,期望大容量EMI滤波器来去除各种噪声等,但是当向第二驱动电机14供应电力时,不需要EMI滤波器,因为驱动电机14本身具有大电感。因此,当电力供应给第二驱动电机14时,可以并且更有效地旁路升压电感器电路21或EMI滤波器,并且将开关电路23生成的三相电力直接提供给第二驱动电机14。
图4是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向DC-DC转换器的示例的电路图。
图4所示的示例是使用变压器35的绝缘DC-DC转换器。绝缘DC-DC转换器可以包括:变压器35,包括与连接到双向PFC电路151的第二输入/输出端口T2的输入/输出端口T3协作形成互感的两个线圈;开关电路31,连接在输入/输出端口T3和变压器35的线圈之间;以及开关电路33,连接在连接到电池11的输入/输出端口T4和变压器35的另一线圈之间。
当对电池11充电时,开关电路31将施加到输入/输出端口T3的DC电压(即,在双向PFC电路151的第二输入/输出端口T2生成的DC电压)转换成AC型,然后将其施加到变压器35的线圈。通过互感感应到变压器35的另一线圈的AC电压被开关电路33转换回DC型,然后输出到输入/输出端口T4,由此可以向电池11提供充电电力。显然,感应到另一线圈的AC电压的幅度可以由变压器35的两个线圈之间的匝数比来确定。
同时,当将驱动电流提供给第二驱动电机14或者电池11的电力被转换并提供给充电入口18以实现V2G时,开关电路33将施加到输入/输出端口T4的电池11的DC电压转换成AC型,然后将其施加到变压器35的线圈。通过互感感应到变压器35的另一线圈的AC电压被开关电路31转换回DC型,然后输出到输入/输出端口T3,由此电池11的电力可以转换并提供给双向PFC电路151的第二输入/输出端口T2。
选择性地,双向DC-DC转换器152还可以包括开关单元371和372,其可以电连接/断开变压器35中的两个线圈的两端。当对电池11充电时,即,当从输入/输出端口T3向输入/输出端口T4供电时,期望在输入/输出端口T4生成具有适当幅度的电压,以能够对电池11进行充电,因此期望通过断开开关单元371和372来改变电压的幅度。然而,当从电池11向第二驱动电机14或系统提供电力时,即,当从输入/输出端口T4向输入/输出端口T3供电时,开关单元371和372短路或者变压器35旁路,由此可以将电池11的电压原样施加到双向PFC电路151的第二输入/输出端口T2。
图5是详细示出根据本公开的实施方式的四轮驱动车辆的双向功率转换器中的双向DC-DC转换器的另一示例的电路图。
图5所示的示例是非绝缘DC-DC转换器。非绝缘DC-DC转换器可以包括:开关元件S7,其一端连接到输入/输出端口T3的端子;电感器L4,其两端分别连接到开关元件S7的另一端和输入/输出端口T4的端子;以及开关元件S8,其一端连接到开关元件S7和电感器L4的连接节点,并且另一端共同连接到输入/输出端口T3的另一端子和输入/输出端口T4的另一端子。
图5所示的非绝缘DC-DC转换器,可以在从输入/输出端口T3向输入/输出端口T4进行供电时,作为降低电压的降压转换器操作,并且可以在从输入/输出端口T4向输入/输出端口T3进行供电时,作为升高电压的升压转换器操作。
当电池11被充电时,通过控制开关元件S7的占空比来降低输入/输出端口T3的电压,可以在输入/输出端口T4生成能够对电池11充电的电压。
此外,当将驱动电流提供给第二驱动电机14或者电池11的电力被转换并提供给充电入口18以实现V2G时,可以通过控制开关元件S8的占空比来增加电池11的电压并将其施加到输入/输出端口T3。作为另一示例,通过使开关元件S7短路并且使开关元件S8断开,可以将电池11的电压无变化地施加到输入/输出端口T3。
如上所述,根据本公开的几个实施方式的四轮驱动车辆,集成了用于给电池充电的OBC和向给辅助轮提供动力的驱动电机供应驱动电力的逆变器,从而能够简化车辆的构造。因此,可以减小四轮驱动系统的体积并降低成本,从而能够确保高竞争力。
尽管上面参考特定实施方式描述了本公开,但是对于本领域技术人员来说,显然可以以各种方式改变和修改本公开。
Claims (15)
1.一种四轮驱动车辆,包括:
主驱动轮和辅助驱动轮;
第一驱动电机,被配置为向所述主驱动轮提供动力;
第二驱动电机,被配置为向所述辅助驱动轮提供动力;
电池,被配置为储存电能;
逆变器,被配置为对储存在所述电池中的所述电能进行转换并提供给所述第一驱动电机;以及
双向功率转换器,被配置为通过转换从车辆外部供应的功率来生成用于对所述电池充电的充电电力,并被配置为对储存在所述电池中的所述电能进行转换并提供给所述第二驱动电机。
2.根据权利要求1所述的四轮驱动车辆,其中,所述第二驱动电机的额定功率小于所述第一驱动电机的额定功率。
3.根据权利要求1所述的四轮驱动车辆,还包括:
第一开关元件,连接在所述双向功率转换器和充电入口之间,所述充电入口被配置为供应外部充电电力,以及
第二开关元件,设置在所述双向功率转换器和所述第二驱动电机之间,
其中,当通过所述充电入口施加所述外部充电电力或者通过所述充电入口输出所述电池的电力时,所述第一开关元件短路并且所述第二开关元件断开,并且当驱动所述四轮驱动车辆时,所述第一开关元件断开并且所述第二开关元件短路。
4.根据权利要求1所述的四轮驱动车辆,其中,所述双向功率转换器包括:
双向功率因数校正电路,连接到所述第二驱动电机和充电入口,所述充电入口被配置为供应外部充电电力,以及
双向DC-DC转换器,连接在所述双向功率因数校正电路和所述电池之间。
5.根据权利要求4所述的四轮驱动车辆,其中,所述双向功率因数校正电路包括:
第一输入/输出端口,选择性地连接到所述充电入口或所述第二驱动电机;
第二输入/输出端口,连接到所述双向DC-DC转换器;
升压电感器电路,包括分别连接到所述第一输入/输出端口的端子的多个升压电感器;以及
开关电路,包括连接到所述升压电感器电路的多个开关元件,
其中,所述第一输入/输出端口具有三个端子,并且所述多个升压电感器包括分别连接到所述第一输入/输出端口的三个端子的第一升压电感器、第二升压电感器和第三升压电感器;
其中,所述第二输入/输出端口具有两个端子,并且所述开关电路包括在所述第二输入/输出端口的两个端子之间彼此串联连接的第一开关元件和第二开关元件、在所述第二输入/输出端口的两个端子之间彼此串联连接的第三开关元件和第四开关元件以及在所述第二输入/输出端口的两个端子之间彼此串联连接的第五开关元件和第六开关元件;
其中,所述第一升压电感器的第二端连接到所述第一开关元件和所述第二开关元件的连接节点,所述第二升压电感器的第二端连接到所述第三开关元件和所述第四开关元件的连接节点,所述第三升压电感器的第二端连接到所述第五开关元件和所述第六开关元件的连接节点。
6.根据权利要求5所述的四轮驱动车辆,其中,当具有不同相位的三相AC电流从所述充电入口分别输入到所述第一输入/输出端口的端子并且对所述电池充电时,所述第一升压电感器、所述第一开关元件和所述第二开关元件被配置为形成第一升压电路,所述第二升压电感器、所述第三开关元件和所述第四开关元件被配置为形成第二升压电路,并且所述第三升压电感器、所述第五开关元件和所述第六开关元件被配置为形成第三升压电路,使得具有不同相位的AC电力以提高的功率因数输出到所述第二输入/输出端口。
7.根据权利要求5所述的四轮驱动车辆,其中,当将驱动电流提供给所述第二驱动电机或者所述电池的电力被转换然后被提供到所述充电入口时,所述开关电路作为逆变器操作。
8.根据权利要求5所述的四轮驱动车辆,其中,所述双向功率因数校正电路还包括额外输入/输出端口,所述额外输入/输出端口具有连接到所述第一开关元件和所述第二开关元件的端子、连接到所述第三开关元件和所述第四开关元件的端子以及连接到所述第五开关元件和所述第六开关元件的端子,并且所述额外输入/输出端口连接到所述第二驱动电机,
其中,所述四轮驱动车辆还包括连接在所述第一输入/输出端口和所述充电入口之间的第一开关元件和连接在所述额外输入/输出端口和所述第二驱动电机之间的第二开关元件,其中,当通过所述充电入口施加所述外部充电电力或者通过所述充电入口输出所述电池的电力时,所述第一开关元件短路并且所述第二开关元件断开,当驱动所述四轮驱动车辆时,所述第一开关元件断开并且所述第二开关元件短路。
9.根据权利要求4所述的四轮驱动车辆,其中,所述双向DC-DC转换器包括:
第一输入/输出端口,连接到所述双向功率因数校正电路;
变压器,包括形成互感的第一线圈和第二线圈;
第一开关电路,连接在所述第一输入/输出端口和所述变压器的所述第一线圈之间;
第二输入/输出端口,连接到所述电池;以及
第二开关电路,连接在所述第二输入/输出端口和所述变压器的所述第二线圈之间。
10.根据权利要求9所述的四轮驱动车辆,其中,当对所述电池充电时,所述第一开关电路将施加到所述第一输入/输出端口的DC电压转换成AC电压,然后将所述AC电压施加到所述变压器的所述第一线圈,并且所述第二开关电路将感应到所述变压器的所述第二线圈的AC电压转换成DC电压,然后将所述DC电压施加到第二输入/输出端口。
11.根据权利要求9所述的四轮驱动车辆,其中,当驱动电流提供给所述第二驱动电机或者所述电池的电力被转换然后被提供到所述充电入口时,所述第二开关电路将施加到所述第二输入/输出端口的所述电池的DC电压转换成AC电压,然后将所述AC电压施加到所述变压器的所述第二线圈,并且所述第一开关电路将感应到所述变压器的所述第一线圈的AC电压转换成DC电压,然后将所述DC电压施加到所述第一输入/输出端口。
12.根据权利要求9所述的四轮驱动车辆,其中,所述双向DC-DC转换器还包括第一开关元件和第二开关元件,所述第一开关元件和第二开关元件使所述变压器中的所述第一线圈和所述第二线圈中的每一个的两端电断开或短路,
其中,当对所述电池充电时,所述第一开关元件和所述第二开关元件断开,并且当驱动电流被提供给所述第二驱动电机或者所述电池的电力被转换然后被提供充电入口时,所述第一开关元件和所述第二开关元件短路。
13.根据权利要求4所述的四轮驱动车辆,其中,所述双向DC-DC转换器包括:
第一输入/输出端口,连接到所述双向功率因数校正电路;
第二输入/输出端口,连接到所述电池;
第一开关元件,第一端连接到所述第一输入/输出端口的第一端子;
电感器,两端分别连接到所述第一开关元件的第二端和所述第二输入/输出端口的第一端;以及
第二开关元件,第一端连接到所述第一开关元件和所述电感器的连接节点,第二端共同连接到所述第一输入/输出端口的第二端子和所述第二输入/输出端口的第二端子。
14.根据权利要求13所述的四轮驱动车辆,其中,当对所述电池充电时,控制所述第一开关元件的占空比,使得所述第一输入/输出端口的电压升高,并且能够对所述电池充电的充电电压被输出到所述第二输入/输出端口。
15.根据权利要求13所述的四轮驱动车辆,其中,当驱动电流被提供给所述第二驱动电机或者所述电池的电力被转换然后被提供到所述充电入口时,控制所述第二开关元件的占空比,使得所述电池的电压升高并输出到所述第一输入/输出端口,或者所述第一开关元件短路并且所述第二开关元件断开,使得所述电池的电压未改变地施加到所述第一输入/输出端口。
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