CN103424690A - 用于诊断电动车辆的继电器触点的装置及其方法 - Google Patents
用于诊断电动车辆的继电器触点的装置及其方法 Download PDFInfo
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- CN103424690A CN103424690A CN2013101926597A CN201310192659A CN103424690A CN 103424690 A CN103424690 A CN 103424690A CN 2013101926597 A CN2013101926597 A CN 2013101926597A CN 201310192659 A CN201310192659 A CN 201310192659A CN 103424690 A CN103424690 A CN 103424690A
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- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
本发明公开了一种用于诊断电动车辆的继电器触点的装置及其方法。该方法包括测量从高压电池输入到逆变器的第一电压;比较第一电压和通过高压电池输出的第二电压;当第一电压大于第二电压时,识别第一电压的检测时间点;以及基于所识别的检测时间点,确定中断高压电池的输出电压的高压继电器是否发生故障。
Description
相关申请的交叉引用
本申请根据35U.S.C.119和35U.S.C.365要求第10-2012-0054264号(2012年5月22日提交的)韩国专利申请的优先权,这里通过引用将其全部并入。
技术领域
本发明涉及一种连接到用于电动车辆的逆变器的诊断装置。更特别地,本发明涉及一种用于诊断继电器触点的装置及其方法,该装置安装在连接到电动机控制器的电力线处以诊断闭合或断开主电源的高压继电器触点的熔融。
背景技术
用作环保车辆中采用的电动机控制器的逆变器是将高压DC电力转换成AC电力或DC电力以用于控制电动机的目的的电子的/电的子组件(ESA)。逆变器是用作车辆的电驱动设备的主要构件。
在这样的环保车辆中,将高压继电器连接到用于每个电动机的电力线并且每个电动机控制器包括逆变器,使得高压继电器闭合或断开用作主电源的电池。高压继电器配备有用于通过电动机驱动车辆的紧急运行控制功能,并配备有电力切断功能(其甚至在由于三个电动机和三个电动机控制器中的两个电动机和两个电动机控制器的故障而引起执行紧急运行时也可用)。
也就是说,当正运行车辆时当由于过压或者过流在IGBT(绝缘栅双极晶体管)中发生电介质崩溃或问题时,,连接到电力线的高压继电器切断正供应到对应的电动机和电动机控制器的电力并且使用仍然在正常状态中的其它电动机和电动机控制器来执行紧急运行,其中,该IGBT是包括在电动机控制器中的逆变器。
因为大的电流双向流动通过控制到电动机和电动机控制器的电力供应的高压继电器,由于温度增加和故障构件,所以高压继电器熔融的概率非常高。因为不可能在熔融状态中切断到遇到障碍的电动机和电动机控制器的电力供应,所以由于具有障碍的电动机的旋转而生成的反电动势对其它正常的电动机和电动机控制器产生影响,使得连续的电流发生。
图1是图示根据在第10-2009-0118728号韩国专利申请中公开的相关技术的诊断继电器触点的方法的流程图。
参见图1,在在步骤S101中运行燃料电池车辆的状态中,在步骤S102中确定燃料电池堆是否响应于车辆的停止而正常关闭。
在步骤S102中,如果燃料电池堆正常关闭,主控制器首先关闭第一继电器到第三继电器Ry1、Ry2和Ry3,从而首先切断燃料电池堆和超级电容器的输出功率并且然后关闭为高电压继电器的第四继电器,从而阻断到电动机控制器的电力供应。
在这一情况下,尽管***补充装置阻断供应给燃料电池堆的正极的氢并且供应氧以去除残留的氢,因为未正常供应电力,内部电容器C的能量用于驱动***补充装置,从而发生电压变化。
此外,如果由于第四继电器Ry4的关闭而切断供应给电动机控制器的电力,则内部电阻R时常引起电容器C1的电压降。
因而,在步骤S103中,主控制器检测内部电容器C的电压变量(△(LDC)),在步骤S104中检测内部电容器C1的电压变量(△(MCU)),并且然后,在步骤S105中比较检测到的两个电压变量值。
在步骤S106中确定所检测到的主电压值是否彼此相等。如果电压值彼此不相等,则在步骤S109中确定连接到电力线的高压继电器Ry4是正常的。
但是,如果电压值彼此相等,则在步骤S107中确定由于连接到电动机控制器的电力线的高压继电器Ry4的熔融而使***补充装置使用电动机控制器的内部电容器C1的电压。
如上所述,如果确定发生连接到电力线的高压继电器Ry4的熔融,则将诊断代码存储在存储器中使得驱动器能够快速地更换继电器。
当关闭点火时,通过单独的电子构件(LDC;低压DC-DC转换器)执行根据相关技术的诊断继电器触点的方法,从而检测继电器的熔融。
但是,根据相关技术的诊断继电器触点的方法需要与单独的电子组件(LDC)相关并且在关闭时执行。当单独的电子组件在关闭时出故障时,通常不执行继电器诊断,使得驱动器可能遭受危险的情形。
发明内容
本发明提供了一种用于诊断继电器触点的装置及其方法,该装置仅仅使用电动机控制器而不使用单独的电子构件来诊断继电器触点。
本发明提供了一种用于诊断继电器触点的装置,通过在点火状态而非关闭状态时诊断继电器触点状态,该装置能够防止由于车辆构件故障而引起的紧急情形。
同时,本发明实现的目标可以不限于以上目标,并且从以下描述中,本领域技术人员能够清楚地理解其它目标。
根据本发明,提供了一种诊断电动车辆的继电器触点的方法。该方法包括测量从高压电池输入到逆变器的第一电压;比较第一电压和通过高压电池输出的第二电压;当第一电压大于第二电压时,识别第一电压的检测时间点;以及基于所识别的检测时间点,确定用于中断高压电池的输出电压的高压继电器是否发生故障。
根据本发明,提供了一种用于诊断电动车辆的继电器触点的装置。该装置包括用作主电源的高压电池;从高压电池接收DC(直流)电力并且通过改变DC电力的相位来驱动电动机的逆变器;以及在高压电池和逆变器之间的高压继电器,高压继电器中断通过高压电池输出的DC电力,其中,基于这样的时间点:根据DC电力的供应的DC链路电压值等于或大于高压电池的电压值,逆变器确定高压继电器是否发生故障,并且根据诊断结果中断输入到电动机的电力。
根据本发明,诊断安装在电动车辆的电力线上的高压继电器是否熔融并且将诊断结果指示给驾驶员,使得在驱动车辆之前能够执行快速检修或更换,从而提高稳定性和可靠性。
根据本发明,逆变器可以不与其它电组件相互作用地诊断继电器的熔融,使得用户可以基于继电器的熔融状态针对危险情形采取必要的措施。
进一步,根据本发明,在电动车辆的点火状态时诊断继电器是否熔融,使得能够防止在电动车辆的熔融状态下驱动电动车辆。
附图说明
图1是图示根据相关技术的诊断继电器触点的方法的流程图;
图2是示出根据实施例的电动车辆的电路图;
图3是具体示出图2中描述的逆变器的方框图;
图4是图示根据实施例的正常运行中的电压变化的曲线图;
图5是图示根据实施例的异常运行中的电压变化的曲线图;以及
图6是图示根据实施例的逐步诊断继电器触点的方法的流程图。
具体实施方式
以下将描述实施例的原理。因此,尽管在说明书中没有具体描述和叙述,具有本领域普通技术的人员可以实现实施例的原理并且可以发明在实施例的构思和范畴内的各种装置。进一步,原则上,说明书中提及的条件术语和实施例显然应当旨在用于理解实施例的构思并且不可限制实施例的范围。
进一步,应当理解,教导具体实施例以及原理、方案和实施例的所有的具体描述旨在包括结构上和功能上的等同方案。进一步,应该理解等同方案可以包括未来待开发的等同方案以及已知的等同方案并且可以包括不论其结构的发明用于执行同样的功能的所有设备。
根据实施例,逆变器可以不与其它电子组件相互作用地诊断继电器的熔融,使得用户可以基于继电器的熔融状态针对危险情形采取必要的措施。
图2是示出根据实施例的电动车辆的电路图。
参见图2,电动车辆200包括高压电池210、高压继电器220、逆变器230和电动机240。
高压电池210供应驱动电力给电动车辆200。具体地,高压电池210供应DC电力给电动车辆200中的电容器C。
高压电池210可以包括多个单元电池的套。单元电池可以由BMS(电池管理***)来管理,从而维持恒定电压。因而,通过BMS,单元电池可以输出恒定电压。
例如,BMS可以检测高压电池210的电压并且可以将所检测的电压传送到电动车辆200中的电子控制单元(未示出)或逆变器。当电池电压下降到下限值以下时,BMS可以将存储在电动车辆的电容器中的DC电力供应给电池。进一步,当电池电压增加到上限值或者高于上限值时,可以将DC电力供应给电动车辆200的电容器C。
优选地,高压电池210包括能够充电或放电的副电池,但是实施例不限于此。
高压继电器220连接到预定电力线,预定电力线连接到高压电池210,使得高压继电器220中断通过高压电池210输出的DC电力。
具体地,高压继电器220可以包括第一高压继电器和第二高压继电器220。第一高压继电器连接到高压电池210的正极端子,从而中断DC电源。第二高压继电器连接到高压电池210的负极端子,从而中断DC电源。
根据高压继电器220的状态,从高压电池210提供DC电力给逆变器230。逆变器230将DC电力转换成AC电力并且提供AC电力给电动机240。优选地,由逆变器230转换的AC电力包括三相AC电力。
逆变器230通过三相电缆供应三相AC电力给电动机240。三相电缆可以由单独的三根电缆组成。相反地,三根电缆可以包括在单个三相电缆中。
具体地,逆变器230包括IGBT(绝缘栅双极晶体管)并且根据由将在下文描述的控制单元应用到其中的控制信号来执行PWM(脉宽调制)切换操作,从而转换供应给高压电池210的电力的相位以驱动电动机240。
电动机240包括定子(未示出)以及转子(未示出),定子处于静止状态而不旋转,转子旋转。电动机240接收通过逆变器230供应的AC电压。例如,电动机240可以是三相电动机。当具有可变电压/频率的每个相位AC电力以每个相位应用到每个定子线圈时,转子的转速取决于应用的频率而变化。
电动机240可以包括各种类型的电动机,诸如感应电动机、BLDC(无刷DC)电动机、或者磁阻电动机。
同时,可以在电动机240的一侧处设置传动齿轮(未示出)。传动齿轮根据齿轮齿数比来转换电动机240的旋转能量。将传动齿轮的旋转能量传送到前轮和/或后轮,使得电动车辆200移动。
同时,尽管未示出,电动车辆可以进一步包括电控制器以控制电动车辆的整个电设备。电控制器(未示出)控制每个设备的运行和显示。电控制器(未示出)可以控制BMS。
此外,基于从检测电动车辆的倾角的倾角检测器(未示出)、检测电动车辆的速度的速度检测器(未示出)、根据刹车踏板的运行的刹车检测器(未示出)、或者根据加速度踏板的运行的加速度检测器所传送的检测信号,电子控制器可以根据各种运行模式(传动模式、后退模式、空档模式、以及停车模式)生成驱动指示值。在这一情况下,例如,驱动指示值可以包括转矩指令值或者速度指令值。
同时,根据一个实施例的电动车辆200可以包括采用电池和电动机的纯电动车辆、以及采用电池和电动机以及发动机的混合电动车辆。
在这一情况下,混合电动车辆可以包括切换单元以选择电池和发动机中至少一个,并且混合电动车辆可以包括变速箱。同时,混合电动车辆被分成将从发动机输出的机械能转换成电能以驱动电动机的串行混合电动车辆,以及使用从发动机输出的机械能和从电池输出的电能两者的并行混合电动车辆。
图3是具体示出图2中描述的逆变器的方框图。
将参照图3描述根据实施例的触点诊断技术。
参见图3,逆变器230包括数字电源231、DC链路输入单元232、存储器233、主控单元234、电动机控制输出单元235以及显示器236。
数字电源231允许通过高压电池210供应的DC电力下降,从而将驱动电力提供给主控单元234和存储器233。
数字电源231可以是DC-DC转换器。也就是说,为低DC/DC转换器的数字电源231将从高压电池210供应的高压转换成低压并且供应低压给安装在电动车辆200上的各种电构件。
将为DC电力的输入的DC链路输入单元232连接到高压电池210,使得DC链路输入单元232接收从高压电池210提供的高压DC电力。
将运行逆变器230所需的数据以及在运行逆变器230时生成的数据存储在存储器233中。存储器233可以用诸如是EEPROM的存储器媒介来实现。
具体地,存储器233存储关于在运行逆变器230时执行的诊断的结果的诊断信息。
主控单元234控制与高压电池210的电压生成相关的整体运行并且通过控制高压继电器220和逆变器230来控制电动车辆200的整体运行。
在开启电动车辆200的时间点,主控制器234控制高压继电器220的运行以允许高压电池210输出DC电力到逆变器230。
在关闭电动车辆200的时间点,主控制器234控制高压继电器220的运行以阻断输出到逆变器230的电力。
也就是说,在开启电动车辆200的时间点,主控制器234比较输入到DC链路输入单元232的第一电压和通过高压电池210输出的第二电压以诊断高压继电器220的接触状态。
也就是说,在开启电动车辆200的时间点,主控制器234允许开启高压继电器220以允许将在高压电池210中充入的DC电力提供给逆变器230。
在这一情况下,主控制器234将输入到DC链路输入单元232的第一电压的电平和通过高压电池210输出的第二电压的电平相互进行比较,并且基于比较结果诊断高压继电器220是否熔融。
也就是说,当开启高压继电器220时,将在高压电池210中充入的DC电力提供给逆变器230。在这一情况下,初始地(在开启高压继电器220的时间点处)提供给逆变器230的DC电力具有低于第二电压的第一电压。
当经过了足以稳定电压的时间时,输入到逆变器230的DC电力与通过高压电池210输出的DC电力一致。
换而言之,在电压稳定之前,输入到逆变器230的第一电压低于通过高压电池210输出的第二电压,并且在电压稳定时第一电压和第二电压维持在相同电平。
但是,当由于高压继电器220的熔融而引起触点的故障时,在电压稳定之前,第一电压等于第二电压。
这意味着即使在开启电动车辆200前,由于高压继电器220的熔融,高压电池210充入的DC电力连续地应用到逆变器230。
因而,主控单元234基于第一电压等于或高于第二电压的时间点来诊断高压继电器220是否熔融。
如果第一电压等于或高于第二电压的时间点发生在稳定时间点上或稳定时间点后,则主控单元234确定高压继电器220正常。
但是,如果第一电压等于或高于第二电压的时间点发生在稳定时间点之前,则主控单元234确定高压继电器220熔融,从而根据确定结果可以伴随必要的措施。
也就是说,当主控单元234确定高压继电器220为正常时,主控单元234输出控制信号给电动机控制输出单元235,从而将驱动电力提供给电动机240。
然而,当主控单元234确定高压继电器220熔融时,主控单元234允许停止电动机240(阻断供应给电动机的电力)并且然后,存储关于高压继电器220的熔融的诊断信息。
进一步,主控单元234在显示器236上显示针对高压继电器220的熔融的必要措施的信息。因而,显示器236将从主控单元234提供的有关高压继电器220的熔融的信息通知给驾驶员。可以在板上设置显示器236。
图4是图示根据实施例的在正常运行中的电压变化的曲线图。
参见图4,在正常运行高压继电器220的状态,输入到逆变器230的第一电压(DC链路电压)从开启电动车辆的时间点逐渐增加。
也就是说,随着时间从第一时间点1T经过到第七时间点7T,第一电压逐渐增加。在这一情况下,第一电压在比第二电压(电池电压)更低的范围中逐渐增加。
然后,随着时间经过而达到电压稳定的时间点时,第一电压可以等于第二电压。
图5是图示根据实施例的在异常运行中的电压变化的曲线图。
参见图5,在异常运行高压继电器220的状态下,输入到逆变器230的第一电压(DC链路电压)从开启电动车辆的时间点突然增加。这意味着即使在启动电动车辆200之前,持续地将DC电力供应给逆变器230。
随着时间经过,第一电压在电压稳定的时间点之前达到与第二电压的电平相同的电平。
也就是说,在电压稳定之前,从逆变器230输出的电压具有与从高压电池210供应的电压的电平相同的电平。
因而,在实施例中,基于第一电压等于或者高于第二电压并且电压稳定的时间点,诊断高压继电器220是否熔融并且根据诊断结果,选择性地将驱动电压供应给电动机240。
根据实施例,诊断安装在电动车辆的电力线上的高压继电器是否熔融并且将诊断结果指示给驾驶员,使得在驱动车辆之前能够执行快速检修或更换,从而提高稳定性和可靠性。
根据实施例,逆变器可以不与其它电子构件相互作用地诊断继电器的熔融,使得用户能够基于继电器的熔融状态针对危险情形采取必要的措施。
进一步,根据实施例,当电动车辆点火时,诊断继电器是否熔融,使得能够避免在电动车辆的熔融状态驱动电动车辆。
图6是图示根据实施例的逐步诊断继电器触点的方法的流程图。
在步骤S601,电动车辆200处于点火状态。在这一时间点,驾驶员开启电动车辆。
然后,在步骤S602,在开启电动车辆200的时间点,主控单元234根据通过高压电池210输出的DC电力测量输入到逆变器230的DC链路电压(第一电压)。
在步骤S603,当测量第一电压时,主控单元234比较第一电压和通过高压电池210输出的第二电压以确定第一电压是否等于或高于第二电压。换而言之,主控单元234确定第一电压是否等于或高于第二电压。
作为在步骤S603中的确定结果,当第一电压低于第二电压时,在步骤S604中主控单元234确定当前时间点在电压稳定的时间点之前。换而言之,当第一电压低于第二电压时,主控单元234在预定时间内处于备用。然后,在经过预定时间△T之后,主控单元234返回到步骤S602,从而再次测量第一电压。
同时,作为在步骤S603中的确定结果,当第一电压等于或高于第二电压时,在步骤S605中主控单元234识别测量第一电压的时间点。换而言之,当第一电压等于或高于第二电压时,主控单元234识别从点火时间点到当前时间点所经过的时间。
在步骤S606,主控单元234确定测量时间点是否在预定的电压稳定的时间点之时或之前。换而言之,主控单元234确定第一电压等于或高于第二电压的时间点是否发生在稳定时间点之时或之前。
在步骤S607中,在稳定时间点之后,当第一电压达到与第二电压的电平相同或比第二电压的电平更高的电平时,主控单元234确定高压继电器220正常。
但是,在步骤S608中,在稳定时间点之前,当第一电压增加到与第二电压的电平相同或比第二电压的电平更高的电平时,主控单元234确定高压继电器220熔融。
在步骤S609中,主控单元234在存储器233中存储有关高压继电器220的熔融的诊断信息。
在步骤S610中,主控单元234允许显示有关诊断高压继电器220的结果的信息。
根据实施例,诊断安装在电动车辆的电力线上的高压继电器是否熔融并且将诊断结果指示给驾驶员,从而在驱动车辆之前能够执行快速检修或更换,从而提高稳定性和可靠性。
根据实施例,逆变器可以不与其它电子构件相互作用地诊断继电器的熔融,使得用户可以基于继电器的熔融状态而针对危险情形采取必要的措施。
进一步,根据实施例,在电动车辆的点火状态时诊断继电器是否熔融,从而能够避免在电动车辆的熔融状态驱动电动车辆。
可以待存储在计算机可读记录媒介中的用于在计算机中执行该方法的程序来准备根据实施例的以上图象处理方法,并且计算机可读记录媒介的示例包括ROM、RAM、CD-ROM、磁带、软盘、光数据存储器等并且此外,包括载波类(例如,通过因特网的传输)。
计算机可读记录媒介分布在通过网络连接的计算机***上,并且因而可以通过分布式方案来以计算机可读代码存储和执行计算机可读记录媒介。此外,本领域编程人员能够容易地导出用于实现该方法的功能程序、代码、以及代码段。
进一步,如上所述,尽管已经图示和描述了各种示例,本公开不限于以上描述的示例并且本领域技术人员能够在不脱离所附权利要求书的范畴之下作出各种改进。此外,不应将这些改进的示例理解为独立于技术精神或展望。
Claims (8)
1.一种诊断电动车辆的继电器触点的方法,该方法包括:
测量从高压电池输入到逆变器的第一电压;
比较所述第一电压和通过所述高压电池输出的第二电压;
当所述第一电压大于所述第二电压时,识别所述第一电压的检测时间点;以及
基于所识别的检测时间点,确定用于中断所述高压电池的输出电压的高压继电器是否发生故障。
2.如权利要求1的方法,其中在所述电动车辆的点火的时间点处执行对所述第一电压的测量,以及
检测时间点为从点火的时间点到检测所述第一电压的时间点所经过的时间。
3.如权利要求1的方法,进一步包括:
当识别出检测时间点时,比较所述检测时间点和使输入到所述逆变器的电压稳定的时间点。
4.如权利要求3的方法,其中所述高压继电器的故障的确定包括:
当所述检测时间点在稳定时间点之时或之后发生时,确定所述高压继电器是正常的。
5.如权利要求3的方法,其中所述高压继电器的故障的确定包括:
当所述检测时间点在稳定时间点之前发生时,确定在所述高压继电器中发生了熔融。
6.如权利要求5的方法,进一步包括:
当确定了所述高压继电器的熔融时,存储关于所述高压继电器的熔融的诊断信息。
7.如权利要求5的方法,进一步包括:
当确定了所述高压继电器的熔融时,显示关于所述高压继电器的熔融的诊断信息。
8.如权利要求1的方法,进一步包括:
当所述第一电压低于所述第二电压时,在经过预定时间之后,再次测量从所述逆变器输入的所述第一电压。
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JP2013243919A (ja) | 2013-12-05 |
US9052364B2 (en) | 2015-06-09 |
EP2667209A2 (en) | 2013-11-27 |
CN103424690B (zh) | 2016-06-29 |
JP5886789B2 (ja) | 2016-03-16 |
KR101332871B1 (ko) | 2013-11-25 |
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US20130314012A1 (en) | 2013-11-28 |
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