CN103269927A - 主动的高压总线泄放 - Google Patents
主动的高压总线泄放 Download PDFInfo
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Abstract
本发明涉及一种用于使机器(100)的公用总线(116)主动放电的方法,所述机器具有发动机(102)、发电机(112)、牵引马达(124)以及一个或多个辅助装置(126)。该方法可监测发动机(102)的速度相对于第一阈值的关系,监测公用总线(116)的电压相对于第二阈值的关系,并且若发动机速度下降到第一阈值以下且电压超过第二阈值时启动发电机(112)、马达(124)以及辅助装置(126)的一个或多个,从而从公用总线(116)释放电压。
Description
技术领域
本发明总体上涉及电驱动组件,并且更特别地,涉及用于使电力总线主动放电的系统和方法。
背景技术
公用或电力总线用于包括工作机器、车辆以及计算机的多种应用中。电力总线还可用于高压应用中以将动力从动力源传递至电力装置。电力总线本质上是并联电路,所述并联电路用于将多个电力装置与动力源(例如发电机、太阳能电池、蓄电池、等等)连接在一起。此外,电力总线可用于直流(DC)应用中,并且具有正线和负线(或地线),在所述正线和负线上可提供电势差。
在DC电压应用中可能出现的问题是电力装置会存储电能。结果,当电力总线从动力源断开时,电力装置用所存储的电能继续给电力总线提供能量。因此,电力总线要回至低能量状态会需要相对较长的时间,在所述低能量状态下正线和负线之间的电势差最小。由于技术人员在开始修理之前被迫等待电力总线回至低能量状态,因此修理和维护这种机器所需的总时间以及与之相关的成本急剧增加。
许多现存的高压电力总线利用泄放电阻以在相联的动力源被关停或断开时帮助消耗所存储的能量。例如,授予Hickam的美国专利申请第2009/0141412号披露了具有功率电阻的放电电路,所述功率电阻跨连相联电力总线的正线和负线以便释放通过它的电流。在这种泄放电阻提供某种程度的能量耗散的同时,放电的速率仍然局限于自然衰减率,这仍然需要大量的等待时间,尤其是对高压应用来说。此外,这种放电电路和泄放电阻容易失效,这会在没有配备二次保护作为后备的设备中引起重大的安全风险。
本发明的系统和方法旨在克服上述的一个或多个问题。
发明内容
本发明的一方面提供了使机器的公用总线主动放电的方法,所述机器具有发动机、发电机、牵引马达和一个或多个辅助装置。该方法监测发动机的速度相对于第一阈值的关系,监测公用总线的电压相对于第二阈值的关系,并且若发动机速度下降到第一阈值之下且电压超过第二阈值时启动发电机、马达和辅助装置的一个或多个,从而从公用总线释放电压。
本发明的另一方面提供了使机器的公用总线主动放电的方法,所述机器具有发动机和发电机。该方法为发动机确定了速度阈值,为公用总线确定了电压阈值,将发动机的即时速度与速度阈值比较,将公用总线的即时电压与电压阈值比较,并且若发动机的即时速度下降到速度阈值之下且公用总线的即时电压超过电压阈值时将发电机切换至运行模式,从而从公用总线部分地释放多余电压。
本发明的还有一个方面提供了用于机器的主动泄放系统,所述机器具有发动机、发电机、牵引马达和一个或多个辅助装置。主动泄放系统包括公用总线和控制器。公用总线与机器的发电机、牵引马达以及辅助装置的至少之一电连通。控制器至少与机器的发动机和公用总线电连通。控制器还构造成监测发动机的速度相对于第一阈值的关系,监测公用总线的电压相对于第二阈值的关系,并且若发动机速度下降到第一阈值之下且电压超过第二阈值时启动发电机、马达和辅助装置的一个或多个,从而从公用总线释放电压。
附图说明
图1是根据本发明的范例性实施例构成的机器的简图;
图2是主动泄放系统的范例性实施例的示意图,所述主动泄放系统应用于典型的电驱动机器;以及
图3是使机器的电力公用总线主动放电的范例性方法的流程图。
具体实施方式
现在将详细参考特定的实施例或特征,所述实施例或特征的范例在附图中示出。总体而言,对应的参考标号将用在整个附图中以指代相同或对应的部分。
图1概略示出移动机器100,所述机器可采用电驱动装置来致使运动。更特别地,机器100可包括主动力源102,所述主动力源连结至电驱动装置104以便经由牵引装置106致使运动。这种移动机器100可用作工作机器,所述工作机器用于执行与某一行业(例如采矿、建筑、农作、运输)或本领域已知的任何其它适合的行业相关联的特定类型的操作。例如,机器100可以是土方机械、船舶、飞机、牵引机、越野车、公路客运车辆、或任何其它合适的移动机器。
转到图2,它示出了范例性泄放系统108,所述泄放系统应用于机器100的电驱动装置104。电驱动装置104可包括主动力源102,例如柴油发动机、汽油发动机、天然气发动机、或任何其它类型的通常用于产生动力的内燃机。电驱动装置104还可与任何其它适合的动力源(例如燃料电池,等等)一起使用。发动机102可构造成经由传送带、液压系统等等直接或间接传送动力至寄生负载110。发动机102还可构造成经由联轴器或轴向旋转驱动轴114向发电机112机械地传送功率。
图2的发电机112可以是开关磁阻(SR)发电机,或任何其它合适的发电机,所述发电机构造成产生电功率以响应来自发动机102的旋转输入。正如本领域所熟知,发电机112可包括转子(未示出),所述转子可旋转地布置在固定的定子(未示出)之中。发电机112的转子可经由直接的曲轴、齿轮系、液压回路等等可旋转地连结至发动机102的输出。发电机112的定子可经由变换器电路118连接至电驱动装置104的公用总线116,所述变换器电路118具有整流器、反相器、电容器等等。在发电运行模式期间,当发电机112的转子因主动力源102而在定子内旋转时,可产生电流并将电流供应至变换器电路118。变换器电路118可将电信号变换为适当的直流(DC)电压以便分配至机器100的各个电力装置和子部件。此外,例如在电机的运行状态期间,可启动发电机112以致使转子旋转来响应从公用总线116提供给定子的电信号。
公用总线116可提供正线120和负线或地线122,通过所述正线和负线,公用总线116可在机器100的一个或多个电力并联部件之间传递公用DC总线电压。例如,公用总线116可将由发动机102和发电机112供应的动力传递至一个或多个马达124以便经由牵引装置106致使运动。特别地,与发电机112相联的第一变换器电路118可提供DC信号,所述DC信号被传送至与一个或多个马达124相联的第二变换器电路118。第二变换器电路118可将DC信号变换成用于驱动马达124所必需的适当的相位信号。公用总线116还可将公用DC电压传递至机器100的辅助装置126,所述辅助装置例如包括采暖通风和制冷(HVAC)系统128、高压泵130、高压风扇132、或任何其它可由公用DC电压操作的电力装置。此外,辅助装置126可包括二级动力源或混合系统134,所述混合系统构造成将任何的公用DC电压存储在可再充电的储能装置136中,例如蓄电池或大电容器。在这种实施例中,公用总线116可构造成使得存储在储能装置136中的动力可选择性地被传递至发电机112和/或一个或多个马达124,从而使动力源102消耗的燃料或能量最少。在还有其它可供选择的实施例中,辅助装置126可配有可开关的泄放电阻138,所述电阻可选择性地在正线和负线120、122之间结合,从而被动地泄放公用总线116中的任何多余电压。
如图2举例示出,公用总线116还可配备有用于主动泄放或释放存储在公用总线116中的多余电压的装置。更特别地,泄放系统108可配备有控制器140,所述控制器至少与公用总线116和机器100的主动力源或发动机102连通。控制器140可监测机器100的即时运行状态,并且基于这些运行状态进一步确定是否应消耗公用总线电压。运行状态可反映出例如机器100的负载,机器100的对地速度,由操作员输入的机器100的所需操作,等等。基于机器100的这种运行状态,若控制器140确定应泄放公用总线电压,则控制器140可通过启动发电机112、牵引马达124、辅助装置126的一个或多个,或任何其它从公用总线116接收动力的装置来释放总线电压。
在一个特定的实施例中,控制器140可使发电机112进入电机运行模式,从而至少部分地释放多余的总线电压。相应地,泄放系统108的控制器140可与发电机112通讯从而确定和/或选择其运行模式。例如,可经由至开关的直接连接和/或开关磁阻发电机的绕组来管理开关磁阻发电机的控制。控制器140还可构造成通过牵引马达124、HVAC系统128、高压泵130、高压风扇132、或它们的任何组合来释放总线电压。利用混合系统134时,控制器140还可构造成将所释放的总线电压调节和存储在储能装置136中供后续使用。通过启动这种装置,控制器140能够利用现有部件和典型地从机器100内部执行的操作来安全地释放总线电压
泄放系统108的运行可内置或整合至机器100的现有控制中。此外,可利用一个或多个处理器、微处理器、微控制器、电控模块(ECM)、电控单元(ECU)、或任何其它合适用于电子控制泄放系统108的功能的装置来实现控制器140。控制器140可构造成按照预定的算法或指令集运行以便基于机器100的各种运行状态来控制泄放系统108。这种算法或指令集可如本领域通用的那样编程或整合至控制器140的存储器中。
现在参考图3的流程图,它披露了主动泄放或放电机器100的公用总线116的范例性方法。所披露的方法可作为算法或程序代码集来执行,控制器140构造成由所述算法或程序代码集来运行。如图所示,控制器140可起初确定一组阈值,所述阈值用于监测机器100的与公用总线电压相关的一个或多个参数。例如,控制器140可确定用于发动机速度的第一阈值或下限,以及用于公用总线电压的第二阈值或上限。可基于机器100的即时运行状态的组合(例如机器100上的负载、机器100的对地速度、操作员输入、等等)来确定适当的第一和第二阈值。可选地,用于发动机速度和总线电压的阈值可以是编程至控制器140中的预先确定的值。在其它可供选择的实施例中,可将多个预先确定的阈值映射为机器100的不同运行状态,从而使控制器140能够基于所探测到的即时运行状态来取回待采用的理想的阈值集。
图2的控制器140可至少与发电机102和电驱动装置104的公用总线116通讯,以在机器100的正常运行期间监测即时的发电机速度和总线电压,如图3所示。此外,控制器140可持续比较即时发动机速度与发动机速度阈值,并进一步比较即时公用总线电压和总线电压阈值。若两个阈值都达到,例如,若即时发动机速度下降到最小速度阈值之下且总线电压超过最大电压阈值,则控制器140可确定公用总线116中存储有潜在不安全水平的电能而没有对其适当的释放。相应地,如图3所示,控制器140可通过启动发电机112、牵引马达124、一个或多个辅助装置126、或它们的任何组合来开始释放公用总线116的电压。通过将总线电压供应给发电机112、牵引马达124、HVAC系统128、高压泵130或风扇132,可将公用总线116安全地从机器100内放电,同时执行机器100或其操作员可能需要的典型的操作或功能。
在图3的实施例中,例如当即时发动机速度下降到最小速度阈值之下且总线电压超过最大电压阈值时,控制器140可构造成使发电机112进入运行模式。控制器140引发发电机112的运行模式的方式可根据所用的发电机112的构型和类型而不同。例如,在发电机112是开关磁阻型发电机的构型中,控制器140可通过将开关电流引导至发电机112的每一相位并通过斩波、脉宽调制、或本领域通用的任何其它适当的方式将脉冲的正确顺序提供至每一相位来引发电机的运行模式。通过将存储在公用总线116中的电能重新导向回到发电机112中并致使发电机112的转子旋转,控制器140可有效地将公用总线电压释放至较安全的水平。在这种方式下,控制器140可使发电机112进入电机模式,直至离开一个或多个阈值。例如,若公用总线电压下降到最大电压阈值之下,或确认发电机速度超过最小速度阈值,则控制器140可停止从公用总线116引导电流至发电机112,并退出电机的运行模式,如图3所示。一旦控制器140退出电机的运行模式,控制器140可恢复为监测发电机速度和公用总线电压。可选地,控制器140可在返回到监测步骤之前返回以确定新的发电机速度和总线电压阈值。
工业适用性
总体而言,前述的说明在各种工业应用中(例如农业、建筑和采矿工业)找到了用途,例如,在高压移动作业车辆和/或机器中(例如牵引机、挖掘装载机、压实机、伐木集束机、林业机械、工业装载机、滑移装载机、轮式装载机,等等)提供更有效的电力总线泄放。本文披露的系统和方法通过使机器的一个或多个现存装置进入运行模式来释放存储在电力总线中的能量。由于电力总线可快速地放电并由技术员在其上操作,修理和/或维护所费的停机时间显著减少。
从前文所述应理解,尽管出于说明的目的仅阐述了特定的实施例,但基于上文的描述,可供选择的方案或修改方案对本领域技术人员是显而易见的。这些以及其它可供选择的方案被认为是等效的,并在本发明和所附权利要求的精神和范围之内。
Claims (10)
1.一种用于使机器(100)的公用总线(116)主动放电的方法,所述机器具有发动机(102)、发电机(112)、牵引马达(124)以及一个或多个辅助装置(126),方法包括:
监测发动机(102)的速度相对于第一阈值的关系;
监测公用总线(116)的电压相对于第二阈值的关系;并且
若发动机速度下降到第一阈值以下且电压超过第二阈值时启动发电机(112)、马达(124)以及辅助装置(126)的其中一个或多个,从而从公用总线(116)释放电压。
2.根据权利要求1所述的方法,其中辅助装置(126)包括一个或多个采暖通风和冷却HVAC系统(128)、高压泵(130)、高压风扇(132)以及泄放电阻(138)以便被动地释放公用总线(116)中的电能。
3.根据权利要求1所述的方法,其中辅助装置(126)包括混合系统(134),所述混合系统用于将由公用总线(116)释放的电压调节和存储在储能装置(136)中。
4.根据权利要求1所述的方法,其中若发动机速度下降到第一阈值以下且电压超过第二阈值时,发电机(112)被切换至运行模式,从而从公用总线(116)释放电压。
5.根据权利要求4所述的方法,还包括这样的步骤:若公用总线(116)的电压下降到第二阈值之下,则将发电机(112)切换离开运行模式。
6.根据权利要求1所述的方法,其中第一阈值是以机器(100)的负载、机器(100)的对地速度以及操作员输入的至少其中之一为根据的。
7.根据权利要求1所述的方法,其中发电机(112)是开关磁阻发电机。
8.一种用于机器(100)的主动泄放系统(108),所述机器具有发动机(102)、发电机(112)、牵引马达(124)以及一个或多个辅助装置(126),主动泄放系统(108)包括:
与机器(100)的发电机(112)、牵引马达(124)以及辅助装置(126)的至少其中之一电连通的公用总线(116);以及
至少与机器(100)的发动机(102)和公用总线(116)电连通的控制器(140),控制器(140)构造成监测发动机(102)的速度相对于第一阈值的关系,监测公用总线(116)的电压相对于第二阈值的关系,并且若发动机速度下降到第一阈值之下且电压超过第二阈值时启动发电机(112)、马达(124)以及辅助装置(126)的其中一个或多个,从而从公用总线(116)释放电压。
9.根据权利要求8所述的系统(108),其中若发动机速度下降到第一阈值之下且电压超过第二阈值,则控制器(140)将发电机(112)切换至运行模式,并且若公用总线(116)的电压下降到第二阈值之下,则将发电机(112)切换离开运行模式。
10.根据权利要求8所述的系统(108),其中控制器(140)构造成基于机器(100)的一个或多个即时运行状态确定第一阈值,并基于机器(100)的一个或多个即时运行状态确定第二阈值。
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Also Published As
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JP2014507320A (ja) | 2014-03-27 |
WO2012087447A3 (en) | 2012-08-16 |
US8610382B2 (en) | 2013-12-17 |
US20120161679A1 (en) | 2012-06-28 |
CN103269927B (zh) | 2016-06-15 |
DE112011104517T5 (de) | 2013-10-24 |
WO2012087447A2 (en) | 2012-06-28 |
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