CN114726290A - 马达控制装置 - Google Patents
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Abstract
公开马达控制装置。一种马达控制装置(10),控制通过从电池(7)供给的电力而驱动的马达(6),其中,马达控制装置(10)具备大气压传感器(11)和线圈温度传感器(12),设定电池(7)的上限充电率,在大气压为预定压以下、或者、线圈温度为预定温度以上的情况下,降低地设定电池(7)的上限充电率。
Description
相关申请的交叉引用
本申请要求于2021年1月7日提交的日本专利申请No.2021-0001489的优先权,其通过引用整体并入本文,其包括说明书、权利要求书、附图和摘要。
技术领域
本公开涉及进行保护马达的线圈的绝缘覆膜的控制的马达的控制装置。
背景技术
马达设置于例如电动车辆。在马达中,在施加的电压超过预定电压(部分放电开始电压)时,在线圈的绝缘覆膜中发生部分放电,绝缘覆膜的绝缘性能劣化,马达的耐久寿命降低。部分放电开始电压依赖于大气压和线圈温度。因此,例如,在电动车辆在高地行驶的情况下,部分放电开始电压比平地降低,绝缘性能易于劣化。
在日本特开2020-018067号公报中,公开一种在施加到马达的电压超过部分放电开始电压的情况下,通过升压转换器使施加到马达的电压降低的马达控制装置。由此,避免马达的绝缘覆膜的绝缘性能劣化,避免马达的耐久寿命降低。
发明内容
但是,根据搭载于电动车辆的马达,存在不具有升压转换器的情况。另外,升压转换器以及构成升压转换器的升压电路昂贵且部件成本高。
因此,本公开的目的在于提供一种即使在大气压降低或者马达的线圈温度上升的情况下,也无需使用升压转换器而能够避免施加到马达的电压超过部分放电开始电压的马达控制装置。
本公开提供一种马达控制装置,控制通过从电池供给的电力而驱动的马达,其中,所述马达控制装置具备:电子控制单元ECU;大气压检测部,检测大气压;以及线圈温度检测部,检测马达的线圈的温度,ECU构成为:设定电池的上限充电率,在由大气压检测部检测的大气压为预定压以下、或者、由线圈温度检测部检测的线圈温度为预定温度以上的情况下,降低地设定电池的上限充电率。
在本公开所涉及的马达控制装置中,ECU优选地构成为:在大气压为预定压以下、或者、线圈温度为预定温度以上的情况下,与大气压的降低或者线圈温度的上升相应地,阶段性地降低地设定电池的上限充电率。
根据本公开的马达控制装置,即使在大气压降低或者马达的线圈温度上升的情况下,也通过降低地设定电池的上限充电率而降低施加到马达的电压,从而无需使用升压转换器而能够避免施加到马达的电压超过部分放电开始电压。
附图说明
图1是示出设置作为实施方式的一个例子的马达控制装置的车辆的示意图。
图2是示出马达控制装置的结构的框图。
图3是示出电池的电压与充电率的相关性的图表。
图4是示出部分放电开始电压以及电池的电压限制、各特性中的施加到马达的电压与大气压的相关性的图表。
图5是示出部分放电开始电压以及电池的电压限制、各特性中的施加到马达的电压与大气压的相关性的另一图表。
图6是示出部分放电开始电压以及电池的电压限制、各特性中的施加到马达的电压与线圈温度的相关性的图表。
图7是示出部分放电开始电压以及电池的电压限制、各特性中的施加到马达的电压与线圈温度的相关性的另一图表。
图8是示出绝缘覆膜保护控制的流程的流程图。
具体实施方式
以下,详细说明本公开的实施方式的一个例子。在以下的说明中,具体的形状、材料、方向、数值等是用于使本公开易于理解的例示,能够与用途、目的、规格等符合地适当变更。
使用图1,说明设置作为实施方式的一个例子的马达控制装置10的车辆5。图1是示出车辆5的示意图。
如图1所示,马达控制装置10设置于车辆5,包括作为进行各种数据处理的处理器的ECU20(Electronic Control Unit,电子控制单元)。本例子的车辆5是通过从电池7供给的电力驱动马达6并将马达6作为动力行驶的电动车辆。此外,车辆5也可以是例如混合动力车辆。
马达控制装置10是进行保护马达6的线圈的绝缘覆膜的绝缘覆膜保护控制的马达6的控制装置。根据马达控制装置10,即使在大气压降低或者马达6的线圈温度上升的情况下,也通过降低地设定电池7的上限充电率而降低向马达6的施加电压,从而能够避免施加电压超过部分放电开始电压,详细内容后述。由此,无需使用升压转换器而能够避免绝缘覆膜的绝缘性能劣化。
马达控制装置10具备:大气压传感器11,检测大气压;以及线圈温度传感器12,检测马达6的线圈温度。
使用图2至图7,说明马达控制装置10的结构。图2是示出马达控制装置10的结构的框图。图3是示出电池7的电压与充电率的相关性的图表。图4是示出部分放电开始电压以及电池7的电压限制,示出各特性中的向马达6的施加电压与大气压的相关性的图表。图5是示出部分放电开始电压以及电池7的电压限制,示出向马达6的施加电压与大气压的相关性的另一图表。图6是示出部分放电开始电压以及电池7的电压限制,示出向马达6的施加电压与线圈温度的相关性的图表。图7是示出部分放电开始电压以及电池7的电压限制,示出向马达6的施加电压与线圈温度的相关性的另一图表。
ECU20具有作为运算处理部的CPU(Central Processing Unit,中央处理单元)和RAM(Random Access Memory,随机存取存储器)、ROM(Read Only Memory,只读存储器)等存储部,一边利用RAM的临时存储功能,一边依照预先存储于ROM的程序进行信号处理。
如图2所示,ECU20与大气压传感器11、线圈温度传感器12等连接,接收从这些发送的信号。另外,马达控制装置10与电池7连接,向它们发送信号。
ECU20包括:大气压取得部13,取得由大气压传感器11检测的大气压;线圈温度取得部14,取得由线圈温度传感器12检测的马达6的线圈温度;以及电池上限充电率降低部15,使电池7的上限充电率降低。
电池上限充电率降低部15具有如下功能:根据由大气压取得部13取得的大气压和由线圈温度取得部14取得的线圈温度,在大气压为预定压以下、或者线圈温度为预定温度以上的情况下,降低电池7的上限充电率。
电池7的上限充电率是指,预先设定的电池7的充电率的上限。电池7的充电率是指,从电池7被完全充电的状态去掉放电的电量后的剩余的比值。如图3所示,在电池7的充电率降低时,电池7的电压也降低,所以向马达6的施加电压也降低。
在图4中,示出部分放电开始电压以及电池7的电压限制,示出各特性中的向马达6的施加电压与气压的相关性。部分放电开始电压是指,在对马达6施加该电压以上的电压时在马达6的线圈的绝缘覆膜中发生部分放电的电压。在线圈的绝缘覆膜中发生部分放电时,绝缘覆膜的绝缘性能劣化,马达6的耐久寿命降低。如图4所示,如果气压降低,则部分放电开始电压降低。例如,在车辆5在高地等行驶时,部分放电开始电压比平地降低,绝缘性能易于劣化。
如图4所示,通过电池上限充电率降低部15,在大气压为预定压以下的情况下,通过降低地设定电池7的上限充电率,从而电池7的电压也被限制而降低,所以马达6的施加电压也降低。由此,即使在车辆5在高地等行驶时大气压降低的情况下,马达6的施加电压也降低,所以能够避免马达6的施加电压超过部分放电开始电压。由此,无需使用升压转换器而能够避免绝缘覆膜的绝缘性能劣化。
也可以如图5所示,通过电池上限充电率降低部15,在大气压为预定压以下的情况下,阶段性地降低地设定电池7的上限充电率。由此,电池7的电压也阶段性地降低,所以马达6的施加电压也阶段性地降低。在该情况下,也得到与上述效果同样的效果。
在图6中,示出部分放电开始电压以及电池7的电压限制,示出各特性中的向马达6的施加电压与气压的相关性。如图6所示,如果线圈温度上升,则部分放电开始电压降低。
如图6所示,通过电池上限充电率降低部15,在线圈温度为预定温度以上的情况下,通过降低地设定电池7的上限充电率,电池7的电压也被限制而降低,所以马达6的施加电压也降低。由此,即使在线圈温度上升的情况下,向马达6的施加电压也降低,所以能够避免向马达6的施加电压超过部分放电开始电压。由此,无需使用升压转换器而能够避免绝缘覆膜的绝缘性能劣化。
也可以如图7所示,通过电池上限充电率降低部15,在线圈温度为预定温度以上的情况下,阶段性地降低地设定电池7的上限充电率。由此,电池7的电压也阶段性地降低,所以向马达6的施加电压也阶段性地降低。在该情况下,也得到与上述效果同样的效果。
使用图8,说明利用马达控制装置10的绝缘覆膜保护控制。图8是示出绝缘覆膜保护控制的流程的流程图。
如图8所示,在步骤S11中,通过大气压取得部13,取得由大气压传感器11检测的大气压。在步骤S12中,通过线圈温度取得部14取得由线圈温度传感器12检测的线圈温度。
在步骤S13中,判定在步骤S11中取得的大气压是否为预定压以下。如果是预定大气压以下,则转移到步骤S15。在步骤S14中,判定在步骤S12中取得的线圈温度是否为预定温度以上。如果是预定温度以上,则转移到步骤S15。在步骤S15中,通过电池上限充电率降低部15,降低地设定电池7的上限充电率。
此外,本公开不限定于上述实施方式及其变形例,当然能够在本申请的权利要求书记载的事项的范围内进行各种变更、改良。
Claims (2)
1.一种马达控制装置,控制通过从电池供给的电力而驱动的马达,其中,所述马达控制装置具备:
电子控制单元ECU;
大气压检测部,检测大气压;以及
线圈温度检测部,检测所述马达的线圈的温度,
所述ECU构成为:设定所述电池的上限充电率,在由所述大气压检测部检测的大气压为预定压以下、或者、由所述线圈温度检测部检测的线圈温度为预定温度以上的情况下,降低地设定所述电池的所述上限充电率。
2.根据权利要求1所述的马达控制装置,其中,
所述ECU构成为:在大气压为所述预定压以下、或者、所述线圈温度为所述预定温度以上的情况下,与大气压的降低或者所述线圈温度的上升相应地,阶段性地降低地设定所述电池的所述上限充电率。
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JP4639916B2 (ja) | 2005-04-05 | 2011-02-23 | トヨタ自動車株式会社 | 移動体の制御装置 |
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