CN104656629B - Sintering detection apparatus and method for contactor - Google Patents

Sintering detection apparatus and method for contactor Download PDF

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Publication number
CN104656629B
CN104656629B CN 201310578707 CN201310578707A CN104656629B CN 104656629 B CN104656629 B CN 104656629B CN 201310578707 CN201310578707 CN 201310578707 CN 201310578707 A CN201310578707 A CN 201310578707A CN 104656629 B CN104656629 B CN 104656629B
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signal
contact
test signal
contactor
recovery
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CN 201310578707
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CN104656629A (en )
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熊燕飞
齐阿喜
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比亚迪股份有限公司
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Abstract

本发明提出一种用于接触器的烧结检测装置和方法,所述装置包括:设置在电机接触器的两个触点处的第一检测端和第二检测端;变压器,变压器副边的两个端口分别与第一检测端和第二检测端相连,用于采集第一检测端和第二检测端的通断状态;控制模块和运算放大模块,控制模块用于生成测试信号并将测试信号发送至变压器的原边,运算放大模块用于采集原边两端的信号并进行放大以生成回采信号,控制模块判断回采信号与测试信号的差值大于预设阈值时控制接触器断开,若之后回采信号与测试信号的差值依然大于预设阈值,则判定接触器已烧结。 The present invention provides a sintering apparatus and method for detecting contact, the apparatus comprising: a detection terminal disposed at a first end and a second detecting two contacts at the motor contactor; transformer secondary side of the transformer two ports are connected to the first detection terminal and second detection terminal for detecting a first on-off state of the collection end and a second end detection; operational amplifier and a control module, a control module for generating a test signal and the test signal transmission to the primary side of the transformer, means for collecting operational amplifier signal across the primary recovery and amplification to generate signals to control the control module determines when the contactor is disconnected mining predetermined threshold difference signal is greater than the test signal, if after recovery difference signal with the test signal is still greater than a predetermined threshold value, it is determined that the contact is sintered. 根据本发明实施例的装置,可以检测接触器是否烧结,当接触器烧结时,采取措施保护驱动模块,提高电动汽车的安全性。 The embodiment of the apparatus of the present embodiment of the invention, sintering can detect whether a contact, when the contact sintering, measures to protect the drive module, to improve the safety of the electric vehicle.

Description

用于接触器的烧结检测装置和方法 Sintering detection apparatus and method for contactor

技术领域 FIELD

[0001]本发明涉及电动汽车领域,特别涉及一种用于接触器的烧结检测装置和方法。 [0001] The present invention relates to an electric vehicle, and particularly to the sintering apparatus and method for detecting contactor.

背景技术 Background technique

[0002]电机驱动过程中是需要电流回路的,而单相接触器相连无法构成回路,因此在电动汽车的电机三相线中,使用两个接触器分别控制电机的v相和w相,u相则与控制器的驱动f吴块IGBT(Insulated Gate Bipolar Transistor,绝缘挪双极型晶体管)直接相连,不用接触器进行断开处理。 [0002] Motor driven process is the need of the current loop, and not the single-phase contactor connected to form a loop, so the motor three-phase line electric vehicle, a two contactors control the v phase and w-phase motor, u phase directly connected to the controller f Wu driving block IGBT (insulated Gate bipolar transistor, Norway insulated bipolar transistor), is performed without touching the disconnection processing.

[0003] 对于大多数的电动汽车来说,其驱动功率较小,增加电池包的数量可以使电压增大,那么所需的驱动电流就会比较小。 [0003] For most of the electric vehicle, its driving power is small, the number of the battery pack can increase the voltage increases, the required drive current will be relatively small. 因此,可以选择的交流接触器种类较多。 Therefore, you can choose many kinds of exchanges and contacts. 但是,目前在电动汽车的大功率VT0G (双向逆变充放电技术)设计中,驱动功率较大,而电池包的数量不可能无限增多,即电池包电压不会无限增高,因此驱动电流就不可避免的会增大。 However, the current in the electric vehicle power VT0G (bidirectional inverter charge-discharge technology) design, the drive power is larger, and the number of the battery pack can not be infinitely increased, i.e., the battery pack voltage will not increase infinitely, so that the drive current is not to avoid increases.

[0004]目前,主要存在以下问题:(1)大电流的交流接触器种类较少,多数大电流的交流接触器都使用非标件定制,或者采用直流接触器进行替代,因此,大大增加了接触器失效的风险;(2)接触器是机械器件,使用寿命较短,故在使用中容易出现损坏;(3)接触器在高压配电箱中,不能对接触器的状态进行检测,当接触器发生烧结时,不能及时地采取措施对电动汽车进行保护,容易造成电动汽车的严重损坏。 [0004] Currently, the following problems: low AC type contactor (1) large current, a large majority of the current AC contactor using non-standard items are custom, or DC contactor for substitution, therefore, greatly increased risk of contact failure; (2) is in contact with mechanical devices, short life, it is prone to damage in use; (3) in contact with the high-pressure distribution box, the state of contact can not be detected, if sintered contact occurs, we can not take measures in a timely manner to protect against electric vehicles, likely to cause serious damage to electric vehicles.

发明内容 SUMMARY

[0005] 本发明的目的旨在至少解决上述的技术缺陷之一。 Objective [0005] The present invention is intended to solve at least one of the above technical defects.

[0006] 为此,本发明的第一个目的在于提出一种用于接触器的烧结检测装置,该装置可以检测接触器是否烧结,当检测到接触器烧结时,采取措施保护电机的驱动模块,提高了电动汽车的安全性。 [0006] For this purpose, a first object of the present invention to provide sintering apparatus for detecting the contact, the device can detect whether the contact sintering, is detected when the contactor sintering take measures to protect the motor driving module to improve the safety of electric vehicles.

[0007] 本发明的第二个目的在于提出一种用于接触器的烧结检测方法。 [0007] A second object of the present invention is to propose a method for detecting sintering contactor.

[0008] 为达到上述目的,本发明第一方面实施例的用于接触器的烧结检测装置,包括:设置在电机接触器的两个触点处的第一检测端和第二检测端;变压器,所述变压器副边的两个端口分别与所述第一检测端和所述第二检测端相连,用于采集所述第一检测端和所述第二检测端的通断状态;控制模块和运算放大模块,所述控制模块用于生成测试信号并将所述测试信号发送至所述变压器的原边,所述运算放大模块用于采集所述原边两端的信号并进行放大以生成回采信号,所述控制模块判断所述回采信号与所述测试信号的差值大于预设阈值时控制所述接触器断开,若之后所述回采信号与所述测试信号的差值依然大于预设阈值,则判定所述接触器已烧结。 [0008] To achieve the above object, detecting means for contacting the sintering according to the first aspect of an embodiment of the present invention, comprising: a first end and a second detector detecting two contacts at the ends of the motor contactor; transformer two ports of the secondary transformer with said first end and said second detection terminal is connected to the detection, for the acquisition of the first on-off state detection end and the second end detection; and a control module operational amplifier module, the control module for generating a test signal and the test signal is transmitted to the primary side of the transformer, the operational amplifier of the signal across the primary means for collecting and amplifying the signal to generate a recovery , the control module controls the contactor open determines the preset threshold value of the difference signal and the recovery signal is larger than the test, when the difference after the recovery signal and the test signal remains greater than a predetermined threshold value , it is determined that the contact is sintered.

[0009] 本发明实施例的用于接触器的烧结检测装置,至少具有以下有益效果:(1)在每次电动汽车启动前,对接触器的状态进行检测,确保未吸合接触器之前接触器是断开的状态, 避免电动汽车启动时出现误动作;(2)通过对电机接触器进行检测并判断接触器是否发生烧结,如果接触器烧结,立即采取措施对驱动模块进行保护,提高了驱动模块的使用寿命, 提高了电动汽车的安全性。 [0009] Sintering detecting means for contacting to an embodiment of the present invention, at least the following advantageous effects: (1) Before each time the electric vehicle is started, the state of contact is detected, prior to ensure contact not pull contactor is turned off, to avoid malfunction when starting the electric vehicle; (2) of the motor contactor by detecting and determining whether the sintered contact occurs, if the contact sintering, immediately take measures to protect the drive module, to improve the the life of the drive module, to improve the safety of electric vehicles.

[0010] 为达到上述目的,本发明第二方面实施例的用于接触器的烧结检测方法,包括以下步骤:将变压器副边的两个端口分别与第一检测端和第二检测端相连接,其中,所述第一检测端和所述第二检测端分别设置在接触器的两个触点处;生成测试信号并将所述测试信号发送至变压器的原边;采集所述原边两端的信号并进行放大以生成回采信号;获取所述回采信号,并判断所述回采信号与所述测试信号的差值是否大于预设阈值;当判断大于所述预设阈值时,控制所述接触器断开,以及继续获取所述回采信号;若所述回采信号与所述测试信号的差值仍大于所述预设阈值,则判断所述接触器已烧结。 [0010] To achieve the above object, a method for detecting sintering contactor according to a second aspect of the embodiment of the present invention, comprising the steps of: two ports respectively connected to the transformer secondary side of the first detection and the second detection terminal end wherein said first detection terminal and said second detection terminal are respectively disposed at two contact points of the contacts; generating a test signal and the test signal is transmitted to the primary side of the transformer; acquiring the primary side two amplifying the signal terminal and to generate a signal recovery; obtaining the recovery signal, and determines whether the difference signal and the recovery of the test signal is greater than a predetermined threshold; when it is judged greater than the preset threshold value, controls the contact disconnected, and continue receiving the signal recovery; recovery if said difference signal and the test signal is still greater than the preset threshold value, it is determined that the contact is sintered.

[0011] 本发明实施例的用于接触器的烧结检测方法,至少具有以下有益效果:(1)在每次电动汽车启动前,对接触器的状态进行检测,确保未吸合接触器之前接触器是断开的状态, 避免电动汽车启动时出现误动作d2)通过对电机接触器进行检测并判断接触器是否发生烧结,如果接触器烧结,立即采取措施对驱动模块进行保护,提高了驱动模块的使用寿命, 提高了电动汽车的安全性。 [0011] The sintering process for detecting a contact according to an embodiment of the present invention, at least the following advantageous effects: (1) Before each time the electric vehicle is started, the state of contact is detected, prior to ensure contact not pull contactor is turned off, to avoid malfunction when the electric car starts d2) by detecting motor contactor contacts and determines whether the sintering occurs, if the contact sintering, immediately take measures to protect the drive module, the drive module improved life, improve the safety of electric vehicles.

[0012] 本发明附加的方面和优点将在下面的描述中部分给出,部分将从下面的描述中变得明显,或通过本发明的实践了解到。 [0012] This additional aspects and advantages of the invention will be set forth in part in the description which follows, from the following description in part be apparent from, or learned by practice of the present invention.

附图说明 BRIEF DESCRIPTION

[0013] 本发明上述的和/或附加的方面和优点从下面结合附图对实施例的描述中将变得明显和容易理解,其中: [0013] The present invention described above and / or additional aspects and advantages from the following description of embodiments in conjunction with the accompanying drawings of the embodiments will become apparent and more readily appreciated, wherein:

[0014] 图1是根据本发明一个实施例的用于接触器的烧结检测装置的结构示意图; [0014] FIG. 1 is a schematic diagram for the structure of the sintered contact detecting apparatus according to one embodiment of the present invention;

[0015] 图2是根据本发明一个实施例的用于接触器的烧结检测装置的结构示意图; [0015] FIG. 2 is a schematic diagram for the structure of the sintered contact detecting apparatus according to one embodiment of the present invention;

[0016] 图3是根据本发明一个实施例的用于接触器的烧结检测装置的电路结构示意图; [0016] FIG. 3 is a schematic diagram of a circuit configuration of the detection apparatus for sintering a contactor according to one embodiment of the present invention;

[0017] 图4是根据本发明一个实施例的用于接触器的烧结检测方法的流程图。 [0017] FIG. 4 is a flowchart of a method for detecting a sintered contactor according to one embodiment of the present invention.

具体实施方式 detailed description

[0018] 下面详细描述本发明的实施例,所述实施例的示例在附图中示出,其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。 [0018] Example embodiments of the present invention is described in detail below, exemplary embodiments of the embodiment shown in the accompanying drawings, wherein same or similar reference numerals designate the same or similar elements or elements having the same or similar functions. 下面通过参考附图描述的实施例是示例性的,仅用于解释本发明,而不能解释为对本发明的限制。 By following with reference to the embodiments described are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0019] 下文的公开提供了许多不同的实施例或例子用来实现本发明的不同结构。 [0019] The following disclosure provides many different embodiments or examples to achieve different structures of the present invention. 为了简化本发明的公开,下文中对特定例子的部件和设置进行描述。 To simplify the disclosure of the present invention, be described hereinafter and the members of the specific examples provided. 当然,它们仅仅为示例,并且目的不在于限制本发明。 Of course, they are only illustrative, and are not intended to limit the present invention. 此外,本发明可以在不同例子中重复参考数字和/或字母。 Further, the present disclosure may repeat reference numerals and / or letters in the various examples. 这种重复是为了简化和清楚的目的,其本身不指示所讨论各种实施例和/或设置之间的关系。 This repetition is for the purpose of simplicity and clarity, and does not indicate a relationship between the embodiments and / or arrangements being discussed. 此夕卜,本发明提供了的各种特定的工艺和材料的例子,但是本领域普通技术人员可以意识到其他工艺的可应用于性和/或其他材料的使用。 Bu this evening, the present invention provides various specific examples of materials and processes, but one of ordinary skill in the art that other processes can be applied and / or the use of other materials. 另外,以下描述的第一特征在第二特征之“上”的结构可以包括第一和第二特征形成为直接接触的实施例,也可以包括另外的特征形成在第一和第二特征之间的实施例,这样第一和第二特征可能不是直接接触。 Further, the first characteristic configuration described below in the "on" a second feature may comprise first and second features are formed in direct contact embodiment may also include additional features may be formed between the first and second feature embodiments, so that the first and second features may not be in direct contact.

[0020] 在本发明的描述中,需要说明的是,除非另有规定和限定,术语“安装”、“相连”、 “连接”应做广义理解,例如,可以是机械连接或电连接,也可以是两个元件内部的连通,可以是直接相连,也可以通过中间媒介间接相连,对于本领域的普通技术人员而言,可以根据具体情况理解上述术语的具体含义。 [0020] In the description of the present invention, it is noted that, unless otherwise specified or limited, the terms "mounted," "connected to", "connected" are to be broadly understood, for example, may be a mechanical or electrical connection, It may be in communication the interior of the two elements, may be directly connected, can also be connected indirectly through an intermediary, to those of ordinary skill in the art, to be understood that the specific meanings depending on the circumstances.

[0021] 参照下面的描述和附图,将清楚本发明的实施例的这些和其他方面。 [0021] reference to the following description and the accompanying drawings, embodiments will be apparent to the embodiment of the present invention These and other aspects. 在这些描述和附图中,具体公开了本发明的实施例中的一些特定实施方式,来表示实施本发明的实施例的原理的一些方式,但是应当理解,本发明的实施例的范围不受此限制。 In the description and drawings, particular embodiments disclosed embodiment a specific embodiment of the present invention, indicative of some embodiments of the principles of the embodiments of the present invention, it should be understood that the scope of the embodiments of the present invention are not this limitation. 相反,本发明的实施例包括落入所附加权利要求书的精神和内涵范围内的所有变化、修改和等同物。 In contrast, embodiments of the present invention includes all variations that fall within the appended claims the spirit and terms, modifications and equivalents thereof.

[0022] 在电动汽车的电机三相线中,采用两个电机接触器控制电机的三相线,当接触器发生烧结后,可能会导致与电机相连的驱动模块损坏,为了保护驱动模块以及保证电动汽车的安全,本发明提出一种用于电机的接触器烧结检测装置,下面参考说明书附图描述根据本发明实施例的用于电机的接触器烧结检测装置。 [0022] In the motor of the electric vehicle three-phase line, three-phase two-line control of the motor motor contactor, the contactor when the sintering occurs, the drive module may cause damage to the motor is connected, in order to protect and ensure the driving module safety electric vehicles, the present invention proposes a machine for sintering contact detecting means, is described below with reference means for detecting contact sintering machine according to embodiments of the present specification.

[0023] 在电动汽车的电机三相线中,采用两个电机接触器控制电机的三相线,其中接触器是机械器件,接触器的断开一般是在有大电流流过的时候发生的,在这种情况下最容易出现接触器端子的拉弧现象,触点会产生高温而渐渐融化,然后极易粘连在一起,即所谓的接触器烧结。 [0023] In the motor of the electric vehicle three-phase line, three-phase two-line control of the motor motor contactor, wherein the contactor is a mechanical device, the contactor is disconnected typically occurs when a large current flows through the in this case, the contact terminal most prone to arcing contacts will generate heat and gradually melts, and stick together easily, so-called contact sintering. 接触器发生烧结后,可能会导致与电机相连的驱动模块损坏,为了保护驱动模块以及提高电动汽车的安全性,本发明提出一种用于电机的接触器烧结检测装置和方法, 下面参考说明书附图描述根据本发明实施例提出的用于电机的接触器烧结检测装置和方法。 After the contacts are sintered, the drive module may cause damage to the motor is connected, in order to protect and improve the safety of the driving module of the electric vehicle, the present invention proposes a sintered contact detecting apparatus and method for a motor, the following description with reference to attached contactor sintering detection apparatus and method for a motor according to the proposed embodiment of the present invention described in accordance with FIG.

[0024]图1是本发明实施例的用于接触器的烧结检测装置的结构示意图。 [0024] FIG. 1 is a schematic view of the sintering apparatus for detecting a contact according to an embodiment of the present invention.

[0025]如图1所示,本发明实施例的用于接触器的烧结检测装置包括:第一检测端1 〇〇、第二检测端200、变压器300、控制模块400和运算放大模块500。 [0025] As shown in FIG 1, the sintering apparatus for detecting a contact according to an embodiment of the present invention comprises: a first detecting terminal 1 thousand and, a second detection terminal 200, the transformer 300, the control module 400 and a 500 operational amplifier.

[0026]其中,第一检测端100和第二检测端200分别设置在接触器的两个触点处。 [0026] wherein detecting a first end 100 and a second detection terminal 200 are respectively disposed at two contact points of contacts. 在本发明的一个实施例中,接触器为电动汽车中的电机控制器。 In one embodiment of the present invention, the contactor for the motor controller of the electric vehicle.

[0027]变压器300副边的两个端口分别与第一检测端100和第二检测端200相连,用于采集第一检测端100和第二检测端200的通断状态。 Two ports [0027] side of the transformer 300 and 100 respectively connected to the first detector detecting a second end 200, for collecting a first detection terminal 100 and the second detection terminal 200 of the off state.

[0028]具体地,变压器300将接触器触点上的高压和大电流隔离。 [0028] Specifically, the high voltage transformer 300 and the high current isolation contactor. 变压器300用于采集第一检测端100和第二检测端2〇〇之间的通断状态,例如,当接触器的两个触点吸合时,第一检测端100和第二检测端200之间为接通状态,则变压器300的副边短路,当接触器的两个触点未吸合时,第一检测端100和第二检测端200之间为断开状态,变压器300的副边无回路。 Transformer 300 for the on-off state between the detection terminal 100 and the second 2〇〇 acquisition of the first detection terminal, for example, when two pulls in the contactor contacts, the first end 100 and a second detection terminal 200 detected between the ON state, the secondary side of the transformer 300 is short-circuited, when the two contacts are not pulls in the contactor, a first OFF state between the detection terminals 100 and the second detection terminal 200, the sub transformer 300 no edge loop. [0029]在本发明的一个实施例中,变压器300对功率和砸比无要求,可以是1:1也可以是其他比例。 [0029] embodiment, the power transformer 300 and the hit ratio in a No embodiment of the present invention, may be 1: 1 may be other ratios. 变压器3〇0副边的电阻R3和电容C1是可耐高压的器件,而由电阻R3和电容C1构建的高通滤波器参数则需根据接触器的不同进行相应的参数匹配,参数的匹配可以通过实验完成。 3〇0 secondary side of the transformer resistor R3 and the capacitor C1 are high voltage devices, constructed by the resistor R3 and the capacitor C1 high pass filter parameters need to match the corresponding parameters depending on the contactor, by matching the parameters completion of the experiment.

[0030]控制模块400用于生成测试信号并将测试信号发送至变压器300的原边,运算放大模块500用于采集原边两端的信号并进行放大以生成回采信号,控制模块4〇〇判断回采信号与测试信号的差值大于预设阈值时控制接触器断开,若之后回采信号与测试信号的差值依然大于预设阈值,则判定接触器已烧结。 [0030] The control module 400 for generating a test signal and the test signal is transmitted to the primary side of transformer 300, operational amplifier 500 for acquiring a signal across the primary recovery and amplification to generate signals, the control module determines 4〇〇 Mining difference signal with the test signal is greater than the control when the contactor is disconnected preset threshold, if the difference signal and the test signal after the recovery is still greater than a predetermined threshold value, it is determined that the contact is sintered.

[0031]在本发明的一个实施例中,运算放大模块500可以是运算放大器。 [0031] In one embodiment of the present invention, the operational amplifier 500 may be an operational amplifier.

[0032]具体地,钢|如,控制模块400生成测试信号并将测试信号发送至变压器3〇〇的原边, 运算放大模块500采集原边两端的信号并进行放大以生成回采信号,而变压器300的副边与第一检测端100和第二检测端200相连,即与接触器的触点相连,当变压器300副边所连接的接触器吸合时,由变压器300的特点可知,变压器300的副边短路,会导致回采信号发生畸变;当变压器300副边所连接的接触器未吸合时,变压器300的副边断路,对变压器300原边的信号没有影响。 [0032] In particular, steel | e.g., the control module 400 generates a test signal and the test signal is transmitted to the primary side of the transformer 3〇〇, the operational amplifier 500 at both ends of the primary signal acquisition and to generate an amplified signal recovery, while the transformer and the secondary side 300 and a first detecting terminal 100 is connected to the second detection terminal 200, i.e., connected to the contactor contacts, when the side of the transformer 300 is connected to the contact pulls, seen from the characteristics of the transformer 300, transformer 300 the secondary short circuit, a signal will lead to distorted mining; side when the transformer 300 is not connected to the contact pulls in, the open circuit secondary transformer 300, signal 300 has no effect on the primary side of the transformer. 那么可以设定一个预设阈值并通过判断回采信号与测试信号的差值是否大于该预设阈值来判断接触器是否处于吸合状态,当判断回采信号与测试信号的差值大于预设阈值时(即接触器吸合时),控制接触器断开,若之后回采信号与测试信号的差值依然大于预设阈值,则说明接触器的触点粘连在一起无法断开,即判断接触器己烧结。 It can set a predetermined threshold value and whether the difference signal and a recovery test signal is greater than the predetermined threshold value is determined by determining whether the contact is in the pull condition when the mining determination signal of the test signal when the difference is greater than a predetermined threshold value (i.e., the contact pulls), controlled contactor is opened, if the difference signal after the recovery of the test signal remains greater than a predetermined threshold value, then the contact of the contact sticking together can not be turned off, i.e., has determined contactor sintering.

[0033]在本发明的一个实施例中,当判断接触器已经发生烧结无法断开时,为了使与电机相连的驱动模块不受损害,控制模块400则立即关闭PWM(Pulse Width Modulation,脉冲宽度调制)波以保护驱动模块。 [0033] In one embodiment of the present invention, when the sintering has occurred is determined contactor can not be disconnected, to the drive module is connected with the motor is not impaired, the control module 400 immediately off PWM (Pulse Width Modulation, Pulse Width modulation) wave to protect the drive module.

[0034] 在本发明的一个实施例中,控制模块400可以通过DSP(Digital Signal Processing,数字信号处理器)实现,也可以通过其它器件实现,在此不对控制模块400的实现方式进行限制。 [0034] In one embodiment of the present invention, the control module 400 by DSP (Digital Signal Processing, digital signal processor) implementation can be achieved by other means, this control implementation module 400 not to be limiting.

[0035]在本发明的一个实施例中,控制接触器断开之后,若回采信号与测试信号的差值变为小于预设阈值,则说明接触器的触点可以根据控制正常断开,即判断接触器未发生烧结。 [0035] In one embodiment of the present invention, the contactor is opened after the control, if the difference signal and the test signal recovery becomes less than a preset threshold, then the contactor contacts may be normally off according to a control, i.e., Analyzing unsintered contact occurs.

[0036]图2是本发明实施例的用于接触器的烧结检测装置的结构示意图,如图2所示,控制模块400具体包括:测试信号发送单元410和控制单元420。 [0036] FIG. 2 is a schematic diagram of the structure of the sintered detecting means for contacting to an embodiment of the present invention, shown in FIG. 2, the control module 400 comprises: a test signal transmitting unit 410 and control unit 420. 图3是根据本发明一个实施例的用于接触器的烧结检测装置的电路结构示意图。 FIG 3 is a diagram illustrating a circuit structure of the sintered contact detecting apparatus for an embodiment of the present invention. 下面结合图2和图3来描述测试信号发送单元410和控制单元420。 Below in connection with FIGS. 2 and 3 will be described the test signal transmission unit 410 and control unit 420.

[0037]测试信号发送单元410用于生成测试信号并将测试信号发送至变压器300的原边。 [0037] The test signal transmission unit 410 for generating a test signal and the test signal is transmitted to the primary side of the transformer 300. [0038]具体地,如图3所示,变压器300的原边为低压部分,测试信号发送单元410生成测试信号并将测试信号发送至变压器300的原边。 [0038] Specifically, the original 3, transformer 300 is a low pressure portion in FIG side, the test signal transmission unit 410 generates a test signal and the test signal is transmitted to the primary side of the transformer 300. 例如,测试信号可以是一个固定频率的正弦波。 For example, the test signal may be a sine wave of a fixed frequency. 在此不对测试信号的具体形式进行限制。 In this particular not limiting forms of the test signal.

[0039]控制单元420用于判断回采信号与测试信号的差值大于预设阈值时控制接触器断开,若之后回采信号与测试信号的差值依然大于预设阈值,则判定接触器已烧结,若之后回采信号与测试信号的差值变为小于预设阈值,则判定接触器未发生烧结。 [0039] The control unit controls the contactor 420 turned off when a preset threshold value for determining the difference between the test signal and the recovery signal is greater than the difference signal when the test signal after the recovery is still greater than a predetermined threshold value, it is determined that the contact is sintered when the difference signal after the recovery of the test signal becomes less than a preset threshold value, it is determined that contact has not occurred sintering.

[0040] 具体地,如图3所示,当变压器300的副边所连接的接触器吸合后,对于高频信号而言,变压器300副边的R3、C1相当于出现了短路现象,由变压器300的特点可知,测试信号在变压器300原边储存的能量在副边短路后向副边传递释放,此时变压器300原边两端的信号会发生畸变,那么回采信号与测试信号发送单元410发送的测试信号之间存在很大差别,控制单元420据此来判定接触器处于吸合状态。 [0040] Specifically, as shown in FIG. 3, when the side of the sub transformer 300 is connected contactor pull, for high frequency signals, the transformer 300 secondary side of R3, a C1 corresponding to the short circuit occurs, the characteristics of transformer 300 can be seen, the test signal 300 at the primary side of the transformer to store energy in the secondary transfer to the secondary side short circuit is released, a signal transformer 300 at this time will be distorted at both ends of the primary side, the transmission signal and a recovery test signal transmission unit 410 there is a big difference between the test signal, whereby the control unit 420 determines contactor is energized.

[0041] 更具体地,控制单元420判断回采信号与测试信号的差值大于预设阈值时控制接触器断开,若之后回采信号与测试信号的差值依然大于预设阈值,则判定接触器已烧结,若之后回采信号与测试信号的差值变为小于预设阈值,则判定接触器未发生烧结。 [0041] More specifically, the control unit controls the contactor 420 turned off when a preset threshold difference between the test signal and the recovery determination signal is greater than the difference signal when the test signal after the recovery is still greater than a predetermined threshold value, it is determined that the contactor sintered, if the difference signal after the recovery of the test signal becomes less than a predetermined threshold value, it is determined that contact has not occurred sintering.

[0042] 本发明实施例的用于接触器的烧结检测装置,至少具有以下有益效果:(1)在每次电动汽车启动前,对接触器的状态进行检测,确保未吸合接触器之前接触器是断开的状态, 避免电动汽车启动时出现误动作;(2)通过对电机接触器进行检测并判断接触器是否发生烧结,如果接触器烧结,立即采取措施对驱动模块进行保护,提高了驱动模块的使用寿命, 提高了电动汽车的安全性。 [0042] Sintering detecting means for contacting to an embodiment of the present invention, at least the following advantageous effects: (1) Before each time the electric vehicle is started, the state of contact is detected, prior to ensure contact not pull contactor is turned off, to avoid malfunction when starting the electric vehicle; (2) of the motor contactor by detecting and determining whether the sintered contact occurs, if the contact sintering, immediately take measures to protect the drive module, to improve the the life of the drive module, to improve the safety of electric vehicles.

[0043]在本发明的一个实施例中,下面举例说明使用本发明实施例的用于接触器的烧结检测装置对接触器进行烧结检测的过程:在电动汽车需要断开接触器或者其他需要检测时候,发送断开指令至接触器以控制接触器断开,然后由控制模块400发送测试信号(例如一个特定频率的正弦波)至变压器300的原边,测试信号经变压器300耦合至副边,同时运算放大模块500采集原边两端的信号并进行放大以生成回采信号;若变压器300的副边连接的接触器仍处于吸合状态,由变压器特性可知,副边短路后,会导致原边两端的信号发生畸变; 控制模块400将回采信号与测试信号进行比较,若两者的差值大于预设阈值,则说明接触器的触点粘连在一起无法断开,即判断接触器已发生烧结;若回采信号与测试信号的差值小于预设阈值(即回采信号与测试信号的差异较小),说明 [0043] In one embodiment of the present invention, the following illustrates the use of the sintering process means for detecting the contactor of contactor sintering detection embodiment of the present invention: In an electric vehicle, or other need to open the contactor needs to detect when the OFF command sent to the contactor to control the contactor is opened, and then the control module 400 transmits a test signal (e.g. a particular frequency sine wave) to the primary side of transformer 300 is coupled to the secondary side of the transformer 300 through the test signal, while the operational amplifier 500 acquired signals across the primary and amplified to generate a recovery signal; secondary side if the transformer 300 is connected to the contactor is still in pull state, seen from the transformer characteristics, the secondary short-circuit may cause the primary two end signal is distorted; recovery control module 400 compares the signal with the test signal, both if the difference is greater than a preset threshold, then the contact of the contact sticking together can not be turned off, i.e., contact sintering has occurred is determined; If the difference signal and the test signal recovery is less than a predetermined threshold value (i.e., a small difference signal and the recovery signal test), indicating that 触器可以根据断开指令正常断开,则判断接触器未发生烧结。 The touch-off command may be normally open, contact is judged not be sintered.

[0044]此外,本发明实施例的用于接触器的烧结检测装置目前仅限应用在不带回采功能的接触器,目前带回采功能的接触器较少,而大电流的接触器在做回采时其绝缘处理对成本、工艺等要求更高。 [0044] Further, the sintering means for detecting a contact according to an embodiment of the present invention is not limited to use in mining function back contact, there is less contact back mining function, and a large current contactor insulation recovery process do higher cost, process requirements.

[0045]为了实现上述实施例,本发明还提出一种用于接触器的烧结检测方法。 [0045] In order to achieve the above-described embodiments, the present invention also provides a method for detecting sintering contactor.

[0046]图4是根据本发明一个实施例的用于接触器的烧结检测方法的流程图。 [0046] FIG. 4 is a flowchart of a method for detecting a sintered contactor according to one embodiment of the present invention.

[0047]如图4所示,用于接触器的烧结检测方法包括以下步骤: [0047] As shown, the method for detecting the sintered contact 4 comprises the steps of:

[0048]步骤S101,将变压器副边的两个端口分别与第一检测端和第二检测端相连接,其中,第一检测端和第二检测端分别设置在接触器的两个触点处。 [0048] step S101, the two ports are connected to the transformer secondary side of the first detection and the second detection terminal end, wherein the first and second detection terminal are respectively disposed at two ends of the detection contacts of the contactor .

[0049] 在本发明的一个实施例中,接触器为电动汽车中的电机控制器。 [0049] In one embodiment of the present invention, the contactor for the motor controller of the electric vehicle.

[0050]具体地,变压器将接触器触点上的高压和大电流隔离。 [0050] Specifically, the high-voltage transformer on the high-current contactor and isolation. 变压器用于采集第一检测端和第二检测端之间的通断状态,例如,当接触器的两个触点吸合时,第一检测端和第二检测端之间为接通状态,则变压器的副边短路,当接触器的两个触点未吸合时,第一检测端和第二检测端之间为断开状态,变压器的副边无回路。 A transformer for acquiring on-off state between the first detection terminal and second detection terminal, for example, when two pulls in the contactor contacts, detecting an ON state between a first end and a second detection terminal, short-circuiting the secondary of the transformer, the two contacts when the contacts are not timely absorption, detecting an OFF state between the first end and the second end detection, no transformer secondary circuit.

[0051]步骤S102,生成测试信号并将测试信号发送至变压器的原边。 [0051] step S102, generates a test signal and the test signal is transmitted to the primary side of the transformer.

[0052]例如,可以生成一个固定频率的正弦波并发送至变压器的原边。 [0052] For example, a fixed-frequency sine wave may be generated and sent to the primary side of the transformer.

[0053]步骤Sl〇3,采集原边两端的信号并进行放大以生成回采信号。 [0053] Step Sl〇3 collected across the signal and amplifies the primary signal to generate a recovery.

[0(«4]具体地,由于测试信号经过变压器的原边线圈以及原边的电阻后会出现衰减,故在采集信号时需要将信号放大后再采集,例如通过运算放大器采集原边两端的信号并进行放大,以生成回采信号。 [0 ( «4] Specifically, since the attenuation of the test signal will appear after a primary winding of the transformer and the primary resistance, so in the collected signal after signal amplification is necessary to collect, for example by gathering both ends of the primary operational amplifier amplifies the signal and to generate a signal recovery.

[0055]步骤S104,获取回采信号,并判断回采信号与测试信号的差值是否大于预设阈值。 [0055] step S104, acquires the signal recovery, mining and determines whether the difference signal and the test signal is greater than a predetermined threshold value. [0056]具体地,例如,当接触器吸合时,变压器的副边短路,会导致变压器原边回采得到的信号发生畸变;当接触器未吸合时,变压器的副边断路,对变压器原边的信号没有影响。 [0056] Specifically, for example, when the contact pulls, shorting the secondary of the transformer, the transformer primary cause signal distorted recovery obtained; when the contactor is not pulls in, the open circuit secondary transformer, the transformer primary edge signal is not affected. 那么可以设定一个预设阈值并通过判断回采信号与测试信号的差值是否大于该预设阈值来判断接触器是否处于吸合状态。 You can set a predetermined threshold value and whether the difference signal and a recovery test signal is greater than the predetermined threshold value is determined by determining whether the contactor is energized.

[0057]步骤Sl〇5,当判断大于预设阈值时,控制接触器断开,以及继续获取回采信号。 [0057] Step Sl〇5, when it is judged greater than the predetermined threshold value, the control contactor is opened, and the signals continue to obtain recovery. [0058]具体地,当判断回采信号与测试信号的差值大于预设阈值时(即接触器吸合时), 控制接触器断开,并继续获取回采信号,以用于后续判断接触器是否可以根据控制正常断开。 When [0058] Specifically, when the test signal is determined and the recovery signal difference is greater than a predetermined threshold value (i.e., the contact pulls), controlled contactor is opened, and continues to acquire mining signals for subsequent determination whether a contact The control can be normally open.

[0059]步骤S106,若回采信号与测试信号的差值仍大于预设阈值,则判断接触器已烧结。 [0059] step S106, if the difference between the test signal and the recovery signal is still greater than the preset threshold value, it is determined that the contact is sintered.

[0060] 具体地,若之后回采信号与测试信号的差值依然大于预设阈值,说明接触器的触点粘连在一起无法断开,则判断接触器已烧结。 [0060] Specifically, if the difference signal and the test signal after the recovery is still greater than a predetermined threshold value, indicating contact of the contact sticking together can not be turned off, it is determined that the contact is sintered.

[0061] 在本发明的一个实施例中,在步骤S105之后,还可以包括:步骤S107,若回米伯号与测试信号的差值变为小于预设阈值,则判断接触器未发生烧结。 [0061] In one embodiment of the present invention, after the step S105, may further comprise: step S107, if the number of the test signal back Mibo difference becomes less than a predetermined threshold value, it is determined unsintered contact occurs.

[0062]具体地,若回采信号与测试信号的差值变为小于预设阈值,则说明接触器的触点可以根据控制正常断开,即判断接触器未发生烧结。 [0062] Specifically, if the difference between the test signal and the recovery signal becomes less than a preset threshold, then the contactor contacts may be normally off according to a control, i.e., unsintered contact occurs is determined.

[0063] 在本发明的一个实施例中,步骤S106和步骤S107在执行顺序上不分先后。 [0063] In one embodiment of the present invention, step S106 and step S107 in alphabetical order on the order of execution.

[0064]本发明实施例的用于接触器的烧结检测方法,至少具有以下有益效果:(1)在每次电动汽车启动前,对接触器的状态进行检测,确保未吸合接触器之前接触器是断开的状态, 避免电动汽车启动时出现误动作;(2)通过对电机接触器进行检测并判断接触器是否发生烧结,如果接触器烧结,立即采取措施对驱动模块进行保护,提高了驱动模块的使用寿命, 提高了电动汽车的安全性。 [0064] The sintering process for detecting a contact according to an embodiment of the present invention, at least the following advantageous effects: (1) Before each time the electric vehicle is started, the state of contact is detected, prior to ensure contact not pull contactor is turned off, to avoid malfunction when starting the electric vehicle; (2) of the motor contactor by detecting and determining whether the sintered contact occurs, if the contact sintering, immediately take measures to protect the drive module, to improve the the life of the drive module, to improve the safety of electric vehicles.

[0065]在本说明书的描述中,参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。 [0065] In the description of the present specification, reference to the term "one embodiment," "some embodiments", "an example", "a specific example", or "some examples" means that a description of the exemplary embodiment or embodiments described a particular feature, structure, material, or characteristic is included in at least one embodiment of the present invention, embodiments or examples. 在本说明书中,对上述术语的示意性表述不一定指的是相同的实施例或示例。 In the present specification, a schematic representation of the above terms necessarily referring to the same embodiment or example. 而且,描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。 Furthermore, the particular features, structures, materials, or characteristics described embodiments or examples may be at any one or more in a proper manner.

[0066]尽管已经示出和描述了本发明的实施例,本领域的普通技术人员可以理解:在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型,本发明的范围由权利要求及其等同物限定。 [0066] While there has been illustrated and described embodiments of the present invention, those of ordinary skill in the art can be appreciated: that various changes may be made to these embodiments without departing from the principles and spirit of the invention, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (7)

  1. 1. 一种用于接触器的烧结检测装置,其特征在于,包括: 设置在接触器的两个触点处的第一检测端和第二检测端•, 变压器,所述变压器副边的两个端口分别与所述第一检测端和所述第二检测端相连, 用于采集所述第一检测端和所述第二检测端的通断状态; 控制模块和运算放大模块,所述控制模块用于生成测试信号并将所述测试信号发送至所述变压器的原边,所述运算放大模块用于采集所述原边两端的信号并进行放大以生成回采信号,所述控制模块判断所述回采信号与所述测试信号的差值大于预设阈值时控制所述接触器断开,若之后所述回采信号与所述测试信号的差值依然大于预设阈值,则判定所述接触器己烧结。 A sintering apparatus for detecting the contact, characterized in that, comprising: a first end and a second detection terminal detecting two contacts at contactor •, transformer, the secondary side of the transformer two with said first port and said second detection terminal is connected to the detection terminal for collecting on-off state of the first detection terminal and said second detection terminal; operational amplifier and a control module, the control module for generating a test signal and the test signal is transmitted to the primary side of the transformer, the operational amplifier for the signal acquisition and across the primary recovery amplified signal to generate said control module determines said controlling the contactor open mining the difference signal and the test signal is greater than a predetermined threshold value, if the difference after the recovery signal and the test signal remains greater than a predetermined threshold value, it is determined that the contact hexyl sintering.
  2. 2. 根据权利要求1所述的用于接触器的烧结检测装置,其特征在于,控制所述接触器断开之后,若所述回采信号与所述测试信号的差值变为小于所述预设阈值,则判定所述接触器未发生烧结。 The sintering apparatus for detecting the contact of claim 1, wherein after controlling the contactor open if said difference signal and the test signal recovery becomes less than the pre- set threshold value, it is determined that the unsintered contact occurs.
  3. 3. 根据权利要求2所述的用于接触器的烧结检测装置,其特征在于,所述控制模块包括: 测试信号发送单元,用于生成测试信号并将所述测试信号发送至所述变压器的原边; 控制单元,用于判断所述回采信号与所述测试信号的差值大于预设阈值时控制所述接触器断开,若之后所述回采信号与所述测试信号的差值依然大于所述预设阈值,则判定所述接触器已烧结,若之后所述回采信号与所述测试信号的差值变为小于所述预设阈值,则判定所述接触器未发生烧结。 The sintering apparatus for detecting the contact of claim 2, wherein said control module comprises: a test signal transmission unit for generating a test signal and the test signal to the transformer the primary side; and a control unit for controlling the contactor open mining determining said difference signal and the test signal is greater than a predetermined threshold value, if the difference after the recovery signal and the test signal is still greater than the preset threshold, it is determined that the contact is sintered after the recovery if the test signal and the difference signal becomes less than the preset threshold value, it is determined that the unsintered contact occurs.
  4. 4. 根据权利要求1-3任一项所述的用于接触器的烧结检测装置,其特征在于,所述接触器为电动汽车中的电机控制器。 The contact detecting means for sintering according to any one of claims 1-3, characterized in that the contact is an electric automobile motor controller.
  5. 5. —种用于接触器的烧结检测方法,其特征在于,包括以下步骤: 51、 将变压器副边的两个端口分别与第一检测端和第二检测端相连接,其中,所述第一检测端和所述第二检测端分别设置在接触器的两个触点处; 52、 生成测试信号并将所述测试信号发送至所述变压器的原边; 53、 采集所述原边两端的信号并进行放大以生成回采信号; 54、 获取所述回采信号,并判断所述回采信号与所述测H式信号的差值是否大于预设阈值; 55、 当判断大于所述预设阈值时,控制所述接触器断开,以及继续获取所述回采信号; 56、 若所述回采信号与所述测试信号的差值仍大于所述预设阈值,则判断所述接触器己烧结。 5. - A method for detecting kinds of sintering the contactor, characterized by comprising the steps of: 51, the two ports are connected to the transformer secondary side of the first detection and the second detection terminal end, wherein said first a detection terminal and the second detector are respectively disposed at two ends of the contacts of the contactor; 52, generates a test signal and the test signal is transmitted to the primary side of the transformer; 53, acquiring the two primary amplifying the signal terminal and to generate a signal recovery; 54, obtaining the recovery signal, and determine whether the difference signal with said measured recovery of formula H signal is greater than a predetermined threshold value; 55, when it is judged greater than the preset threshold value when controlling the contactor is opened, and continue receiving the signal recovery; 56, if the difference between the test signal and the recovery signal is still greater than the preset threshold value, it is determined that the contact already sintered.
  6. 6. 根据权利要求5所述的用于接触器的烧结检测方法,其特征在于,所述步骤S5之后, 还包括: 若所述回采信号与所述测试信号的差值变为小于所述预设阈值,则判断所述接触器未发生烧结。 The sintering method for detecting contact of claim 5, wherein, after the step S5, further comprising: if the difference between the test signal and the recovery signal becomes less than the pre- set threshold value, it is determined that the unsintered contact occurs.
  7. 7. 根据权利要求6所述的用于接触器的烧结检测方法,其特征在于,所述接触器为电动汽车中的电机控制器。 The sintering process for the detection of the contact as claimed in claim 6, characterized in that the contact is an electric automobile motor controller.
CN 201310578707 2013-11-18 2013-11-18 Sintering detection apparatus and method for contactor CN104656629B (en)

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