CN101939188A - 控制电机的方法和控制装置 - Google Patents
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Abstract
本发明涉及一种控制电动汽车的电机(5)的方法。在此方法中检测用于控制电机(5)的控制信号。此外还检测电机(5)的运行状态。检测到的电机(5)运行状态用输送给电机(5)的控制信号来校验合理性。当电机(5)出现不合常规的运行状态时,使电机(5)和供电装置(6)之间的连接断开。此外本发明还涉及一种用于电机(5)的控制装置。
Description
技术背景
本发明涉及一种按照权利要求1的前序部分所述的,用于控制电机的方法。本发明还涉及一种按权利要求7前序部分所述的控制装置。按照本发明,所谓电机是指电动汽车的电驱动马达或者用于汽车的混合驱动装置的电动机。已经知道有发动机电子控制仪,它们包括有功能计算机和监测模块。功能计算机和监测模块通过一种问答通信相互监测。功能计算机和监测模块通常由分开的,具有固有频率标准(石英)的电子开关回路组成。在识别问答通信中的错误时,无论是功能计算机还是监测模块都可以通过分开的断开线路使与它们连接的功率终端级断开,从而使整个驱动系统可以达到一种可靠的运行状态。这种运行状态的特征例如在于,节气门和喷油阀都关闭着。对于断开线路,每个行驶循环都测试一次,其方法是,通过SPI-总线来回读功率终端级的状态。因此要确保,在出现错误时可以使功率终端级断开。但是可能发生,在校验断开线路之后,在一个行驶循环开始时,功率终端级的断开机构有故障,例如当行驶循环很长时,因为惯性运行总是被中断。如果在行驶循环结束时,也就是在惯性运行时,就是在汽车电路的端子15之后对断开线路进行测试,那么同样也会发生以下情况:断开机构在下一个起动过程时不再起作用。此外通常的断开线路测试,其中只是反馈一个功率终端级的状态,并不明确说明:是否能够有效地断开功率终端级的执行机构。之前所说的问题在具有混合驱动的汽车或者在一种电动汽车上具有特别的意义。首先电驱动由于延迟时间较短,因此可以比内燃发动机快得多地产生一个转矩。转矩也可以是负的,那么电动汽车可以以最大的向后加速度行驶,这是因为在电动汽车中通常既没有离合器,也没有带倒档的变速器。代之以使电机的输出轴与传动系和车轮硬连接。因此一种可靠的断开在电动汽车中是很重要的。此外在许多电动汽车中都在一个汽车驾驶控制仪里计算所希望的转矩,并通过一个总线,尤其是CAN-总线,将其发送给驱动控制仪。汽车驾驶控制仪可以在故障时可以将断开驱动的要求通过另一个导线,例如一个,总线系统或者一个分立的导线,继续传给驱动控制仪。驱动控制仪的功能计算机和监测模块也具有内部的断开线路,因此接收到来自汽车驾驶计算机的断开要求,并使电驱动的功率终端级断开。但这意味着:断开机构在一种这样的配置时,还是比用内燃发动机的通常驱动时复杂得多并因此易发故障。
发明内容
技术任务
本发明的任务是提出一种控制电动汽车电机的改进的方法,这种方法可以用来实现汽车的可靠运行,而且即使在有故障时也保证一种明确可靠的运行状态。另外本发明的任务还在于提出一种改进的控制仪。
技术解决办法
这些任务通过一种具有权利要求1的特征的控制方法和具有权利要求7的特征的控制仪来解决。本发明基于以下认识:在故障情况下只要使电机与其供电装置可靠分开,就可以实现汽车的可靠运行状态。
发明的优点
在按照本发明设计的用于控制电机的方法中,检测用于控制电机的控制信号并同时检测电机的运行状态。通过合理性检验来检查:是否协调一致。当发生偏差或者不协调一致时,使电机与供电装置分离开。这样避免了不合常规的运行状态,并确保了电动汽车的可靠运行状态。即使正常的断开线路失效,由此也可以排除在汽车的传动系上作用有不受欢迎的转矩。因此对于一种装备有电驱动装置的汽车来说达到一种最大可能的安全性。
特别有利的是,例如借助于适合的传感器来检测电机的转矩和/或转速和/或转速的变化,并且在合理地性方面一个由汽车驾驶控制仪产生的断开信号进行比较,因为这些测量值可以比较容易而且可靠地检测到。也可以备选和或附加地检测汽车本身的运行特性参数,尤其是例如汽车的加速度,并进行合理性检验。
为了实施合理性检验,按照本发明设计的控制装置有利地包括有一个检测模块,电机的控制信号,尤其也有断开信号和表示出电机运行特征参数的其它信号都输送给这模块。在按照本发明的合理性检验范围中确定电机的不合常规的运行状态,例如一个转矩,尽管有一个断开信号,然后为了安全起见使电机与其供电装置分开。这种分开有利地用一种可以由监测模块来控制的开关装置来进行,这种装置使电机和供电装置之间的电流电路中断开。
本发明的其它优点可见以下的说明,权利要求书和附图。
附图说明
以下根据附图对于发明的一种举例的实施形式进行详细说明。所示为:
图1:一种供电和控制装置的框图;
图2:控制装置的一种监测模块的举例的框图。
具体实施方式
图1表示了电机5的一种供电装置和控制装置1的框图。电机5设计成电动汽车的驱动机。用附图标记3表示了一个用于汽车驾驶的控制仪。控制仪3包括有一个功能计算机3.1和一个监测模块3.2。功能计算机3.1和监测模块3.2在输出侧与一个逻辑构件3.3的输入连接,这逻辑构件例如包括有一种OR(或)功能。与逻辑构件3.3的输入相连接的功能计算机3.1和监测模块3.2的输出还通过输出线路3A1和3A2与一个监测模块2连接。一个内部与逻辑构件3.3的输出连接的控制仪3的输出线路3A3与另一个控制仪4的输入相连接。一个内部与功能计算机3.1的一个输出连接的输出线路3A4与控制仪4的另一个输入连接。输出线路3A3也通过输出线路3A5与控制仪2连接。控制仪4用于控制电机5。控制仪4为此包括有一个功能计算机4.1,一个监测模块4.2,一个逻辑构件4.3,一个开关装置4.4和一个终端级4.5。功能计算机4.1的输入与输出线路3A4连接。逻辑构件4.3的第一个输入接头与输出线路3A3连接。逻辑构件4.3的另一个输入接头与监测模块4.2的输出连接。逻辑构件4.3的第三个输入接头与功能计算机4.1的第一个输出连接。同样也例如包括有一种OR-功能的逻辑构件4.3的输出与开关装置4.4的一个输入连接。功能计算机4.1的第二个输出与一个控制着电机5的终端级4.5的第一个输入连接。终端级4.5的第二个输入与开关装置4.4的一个输出连接。监测模块4.2和功能计算机4.1通过输出线路4A3,4A4与监测模块2连接。终端级4.5的输出与电机5连接。用附图标记6表示一个供电装置,它尤其也给电机5供电。对于供电装置6来说,例如是指一种固定装入在电动汽车里的电池或者一种容易更换的电池模块。也可以考虑其它的备选方案,例如像一种发电机或者燃料电池。
在图2中举例表示的框图表示了监测模块2一种简单的实施例和通过这监测模块2对电机5的控制。监测模块2包括有两个比较器2.1,2.2和一个优选转变AND-(和)功能的逻辑构件2.3。通过输入23可以给第一个比较器2.1的输入输送一个用于断开电机5的要求信号。用附图标记24表示了一种分路电阻,这电阻接入在电机5的电流回路里。在分路电阻24上出现的压降通过线路24.1,24.2输送给第二个比较器2.2的输入。比较器2.1和2.2的输出与逻辑构件2.3的输入连接。逻辑构件23的一个输出与开关装置22的一个控制输入22.1连接。开关装置22布置在电机5和供电装置6之间的连接线路中,并且可以通过借助于监测模块2的控制,使电机5与供电装置6分开。除了用分路电阻24检测通过的电机5的电流之外,也还可以用传感器5.1,5.2来检测电机5的相应的运行状态。传感器5.1例如是指一种转速传感器,它检测电机的转速或者转速的变化。传感器5.2例如可以是一种与电机的轴连接的转矩传感器,例如一种应变计的形式,它检测电机5的转矩。
在图1举例表示的一种按照本发明设计的供电和控制装置的实施例中,为了看得更清楚起见,将控制仪3和4分开表示。在本发明的一种实施方案中可以考虑将这些控制仪的功能也汇合在一个唯一的控制仪里。那么也可以替代两个监测模块3.2和4.2和两个功能计算机3.1和4.1,而分别只是设一个监测模块和只设一个功能计算机。
以下叙述用于控制电机5的按照本发明的方法。控制仪3计算出电机5的转矩的名义值Msoll,并通过输出导线3A4将一个对应的控制信号传输给用于控制电机5的控制仪4。由于这个控制信号,控制仪4为电机5提供了一个相应的电流(输出线路4A2)。监测模块2例如通过输出线路3A5检测一种由控制仪3传输的用于断开电机5的要求,并用电机5当前的电耗使之合理。如果电机,尽管要求断开,消耗电流和/或产生一个力矩,则由于安全性的原因通过开关装置22的控制使电机5与供电装置6分开。也可以备选和/或附加地检测电动汽车的运行特征参数,例如像它的加速度,并通过监测模块2校验合理性。
Claims (12)
1.控制电动汽车的电机的方法,电机由供电装置(6)供电,其特征在于,检测用于控制电机(5)的控制信号;检测电机(5)的运行状态;所检测的电机(5)运行状态用输送给电机(5)的控制信号来校验合理性;并且当电机(5)出现不合常规的运行状态时,使电机(5)和供电装置(6)之间的连接断开。
2.按权利要求1所述的方法,其特征在于,检测电机(5)的转矩并用传输给电机(5)的控制信号来校验该转矩的合理性。
3.按上述权利要求之一所述的方法,其特征在于,检测电机(5)的转速,并用传输给电机(5)的控制信号来校验该转速的合理性。
4.按上述权利要求之一所述的方法,其特征在于,检测电机(5)的转速变化,并用传输给电机(5)的控制信号来校验该转速变化的合理性。
5.控制电机的方法,其特征在于,检测用于控制电机(5)的控制信号;检测电动汽车的运行状态;用传输给电机(5)的控制信号来校验电动汽车的被检测到的运行状态的合理性;并且当电动汽车出现不合常规的运行状态时,使电机(5)和供电装置(6)之间的连接断开。
6.按上述权利要求之一所述的方法,其特征在于,检测电动汽车的加速度,并用传输给电机(5)的控制信号来校验该加速度的合理性。
7.用于一种由电机(5)驱动的电动汽车的控制装置,其特征在于,设有监测模块(2);至少可以将规定用来控制电机(5)的控制信号输送给这监测模块(2);还至少可以将代表了电机(5)的运行状态的信号输送给这监测模块(2);而且监测模块(2)包括有对于输送给它的信号进行合理性检验的机构。
8.按权利要求7所述的控制装置,其特征在于,设有可以由监测模块(2)控制的开关装置(22),用这开关装置可以使电机(5)与供电装置(6)分开。
9.按上述权利要求之一所述的控制装置,其特征在于,在电机(5)的电流回路里布置了分路电阻(24),用于检测流过电机(5)的电流。
10.按上述权利要求之一所述的控制装置,其特征在于,设有传感器(5.1,5.2)用于检测电机(5)的转速和/或转速变化和/或电机(5)的转矩。
11.按上述权利要求之一所述的控制装置,其特征在于,监测模块(2)包括有两个比较器(2.1,2.2),其中可以给第一比较器(2.1)输送用于断开电机(5)的要求信号,并可以给第二比较器输送在分路电阻(24)上的压降。
12.按上述权利要求之一所述的控制装置,其特征在于,比较器(2.1,2.2)的输出端与转换AND功能的逻辑构件(2.3)的输入端相连接,后者的输出端与开关装置(22)的控制输入端(22.1)连接。
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CN105339853A (zh) * | 2013-06-26 | 2016-02-17 | 舍弗勒技术股份两合公司 | 带引导电流的线路的中断的检测的控制设备 |
CN110576754A (zh) * | 2019-08-21 | 2019-12-17 | 武汉格罗夫氢能汽车有限公司 | 一种氢燃料电池汽车的电机控制信息处理方法 |
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DE102009046583A1 (de) * | 2009-11-10 | 2011-05-12 | Robert Bosch Gmbh | Verfahren zum Plausibilisieren des Drehmomentes einer elektrischen Maschine und Maschinenregler zur Regelung einer elektrischen Maschine und zur Durchführung des Verfahrens |
DE102009055062A1 (de) * | 2009-12-21 | 2011-06-22 | Robert Bosch GmbH, 70469 | Verfahren und Vorrichtung zur Plausibilisierung eines von einer elektrischen Maschine aufgebrachten Antriebsmomentes in einem Hybridantrieb eines Kraftfahrzeuges |
DE102011055199A1 (de) * | 2011-11-10 | 2013-05-16 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Steuerschaltung für einen Elektromotor |
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CN105339853A (zh) * | 2013-06-26 | 2016-02-17 | 舍弗勒技术股份两合公司 | 带引导电流的线路的中断的检测的控制设备 |
CN105339853B (zh) * | 2013-06-26 | 2018-02-13 | 舍弗勒技术股份两合公司 | 带引导电流的线路的中断的检测的控制设备 |
CN110576754A (zh) * | 2019-08-21 | 2019-12-17 | 武汉格罗夫氢能汽车有限公司 | 一种氢燃料电池汽车的电机控制信息处理方法 |
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