CN111289896B - An electrical measuring device based on motor - Google Patents
An electrical measuring device based on motor Download PDFInfo
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- CN111289896B CN111289896B CN202010087073.4A CN202010087073A CN111289896B CN 111289896 B CN111289896 B CN 111289896B CN 202010087073 A CN202010087073 A CN 202010087073A CN 111289896 B CN111289896 B CN 111289896B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/12—Circuits for multi-testers, i.e. multimeters, e.g. for measuring voltage, current, or impedance at will
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
Description
技术领域technical field
本申请涉及电机技术领域,特别涉及一种基于电机的电性测量装置。The present application relates to the technical field of motors, and in particular, to a device for measuring electrical properties based on a motor.
背景技术Background technique
电机是工业中一种常用装置,负责将电能转化为机械能,对其他装置进行做功。随着国家对新能源汽车产业的推动,近年来有越来越多的车型加汽油发动机,改为驱动用电动机。在新能源汽车中,应用最多的为永磁电机。由于新能源驱动用永磁电机的一些工作特点,如高频控制、大扭矩、大电流、高转速等,新能源驱动用永磁电机较工业电机,将产生更大的轴电流。同时其轴电流的危害也更大。A motor is a common device in industry, responsible for converting electrical energy into mechanical energy and performing work on other devices. With the country's promotion of the new energy vehicle industry, in recent years, more and more models have been equipped with gasoline engines and replaced with electric motors for driving. In new energy vehicles, permanent magnet motors are the most widely used. Due to some working characteristics of permanent magnet motors for new energy drives, such as high frequency control, high torque, high current, high speed, etc., permanent magnet motors for new energy drives will generate larger shaft currents than industrial motors. At the same time, the harm of the shaft current is also greater.
轴电流产生的主要原因包括:1、因为电机内部电磁方案的不均匀性,导致磁通不均匀,进而在电机结构中感应生产电流;2、电机在高压工作状态下,转子高速旋转产生静电荷,随着静电荷的积累,逐渐产生较大的电流;3、新能源永磁电机通常采用高频变频控制,不断变频的电流或电压在电机结构件中感应产生电流。轴电流的危害主要体现在对电机轴承的伤害。轴电流是流经电机轴、轴承,到机壳的电流,在流经轴承的过程中,对轴承产生电腐蚀或其他同类伤害,伤害长期积累,进而导致轴承的完全损坏,导致电机异响、工作噪音大、轴部磨损、温升高等故障。在电动汽车中,为了将电机轴电流的危害降到最大,需要首先对电机工作中的轴电流进行测定,根据所测得的轴电流大小,选择针对性的措施,进而降低轴电流的影响。The main reasons for the generation of shaft current include: 1. Due to the non-uniformity of the internal electromagnetic scheme of the motor, the magnetic flux is not uniform, which in turn induces production current in the motor structure; 2. The rotor rotates at high speed to generate static charge when the motor is in a high-voltage working state. , With the accumulation of static charge, a larger current is gradually generated; 3. The new energy permanent magnet motor usually adopts high-frequency variable frequency control, and the current or voltage of constant frequency conversion induces current in the motor structural parts. The harm of shaft current is mainly reflected in the damage to the motor bearing. The shaft current is the current that flows through the motor shaft, bearing, and the casing. During the process of flowing through the bearing, electrical corrosion or other similar damage is caused to the bearing, and the damage accumulates for a long time, which in turn leads to complete damage to the bearing, resulting in abnormal noise of the motor, Large working noise, shaft wear, temperature rise and other faults. In electric vehicles, in order to minimize the damage of the motor shaft current, it is necessary to first measure the shaft current during the operation of the motor, and select targeted measures according to the measured shaft current to reduce the impact of the shaft current.
现有的测量方式为使用万用表,将万用表的一支表笔接触电机壳体,另一支表笔接触电机轴。此时,轴电流将通过万用表的表笔进入万用表,通过万用表读出示数,进而得到电机的轴电流大小。现有方法的弊端在于,轴电流是电机在运转时才会产生的,电机在静止状态下,无轴电流。所以测试时,电机轴是在转动的状态,此时,需要人工手持万用表表笔,并将其接触在转动状态的轴的表面。测试时,电机为带电工作状态,测试人员有一定的危险;万用表的一支表笔要接触在旋转状态下的轴面上,容易接触不良,导致测量结果不准确,影响测试效果。In the existing measurement method, a multimeter is used, and one test lead of the multimeter is in contact with the motor housing, and the other test lead is in contact with the motor shaft. At this time, the shaft current will enter the multimeter through the test pen of the multimeter, and the output value will be read by the multimeter, and then the shaft current of the motor will be obtained. The disadvantage of the existing method is that the shaft current is only generated when the motor is running, and there is no shaft current when the motor is in a static state. Therefore, during the test, the motor shaft is in a rotating state. At this time, it is necessary to manually hold the multimeter pen and touch it to the surface of the rotating shaft. During the test, the motor is in a live working state, and the tester is in a certain danger; a test lead of the multimeter needs to be in contact with the shaft surface in the rotating state, which is easy to make poor contact, resulting in inaccurate measurement results and affecting the test effect.
发明内容SUMMARY OF THE INVENTION
本申请要解决是电机的轴电流测试装置测试结果不准且安全性不高的技术问题。The present application aims to solve the technical problems of inaccurate test results and low safety of the shaft current testing device of the motor.
为解决上述技术问题,本申请实施例公开了一种基于电机的电性测量装置,包括电机、测量器、第一导电件、第二导电件、第一传导件、第二传导件和固定结构;In order to solve the above technical problems, the embodiment of the present application discloses a motor-based electrical property measurement device, including a motor, a measuring device, a first conductive member, a second conductive member, a first conductive member, a second conductive member, and a fixing structure ;
电机包括壳体和转轴;The motor includes a casing and a rotating shaft;
固定结构固定于壳体上,第一导电件的第一端和第二导电件的第一端分别与固定结构可拆卸连接,第一导电件的第二端与壳体连接,第二导电件的第二端与转轴连接;固定结构为绝缘体;The fixing structure is fixed on the housing, the first end of the first conductive member and the first end of the second conductive member are respectively detachably connected to the fixing structure, the second end of the first conductive member is connected to the housing, and the second conductive member The second end is connected with the rotating shaft; the fixed structure is an insulator;
第一传导件的一端与第一导电件连接,第一传导件的另一端与测量器的第一端连接;One end of the first conductive member is connected to the first conductive member, and the other end of the first conductive member is connected to the first end of the measuring device;
第二传导件的一端与第二导电件连接,第二传导件的另一端与测量器的第二端连接。One end of the second conducting member is connected to the second conducting member, and the other end of the second conducting member is connected to the second end of the measuring device.
进一步地,测量器包括万用表、电流表或电压表。Further, the measuring device includes a multimeter, an ammeter or a voltmeter.
进一步地,第一导电件包括至少一个第一接触部,至少一个第一接触部与壳体连接;Further, the first conductive member includes at least one first contact portion, and the at least one first contact portion is connected to the housing;
第二导电件包括至少一个第二接触部,至少一个第二接触部与转轴连接。The second conductive member includes at least one second contact portion, and the at least one second contact portion is connected to the rotating shaft.
进一步地,包括紧固件,固定结构与壳体通过紧固件可拆卸连接。Further, a fastener is included, and the fixing structure is detachably connected to the housing through the fastener.
进一步地,固定结构与壳体粘接。Further, the fixing structure is bonded to the casing.
进一步地,固定结构与壳体卡接。Further, the fixing structure is clamped with the casing.
进一步地,第一传导件和第二传导件均包括铜导线。Further, both the first conductive member and the second conductive member include copper wires.
进一步地,第一导电件和第二导电件均为弹性导电件;Further, the first conductive member and the second conductive member are both elastic conductive members;
第一导电件和第二导电件均包括弹性铜片。Both the first conductive member and the second conductive member include elastic copper sheets.
进一步地,固定结构上设有第一固定部,第一导电件通过第一固定部与固定结构连接。Further, the fixing structure is provided with a first fixing portion, and the first conductive member is connected to the fixing structure through the first fixing portion.
进一步地,固定结构上设有第二固定部,第二导电件通过第二固定部与固定结构连接。Further, the fixing structure is provided with a second fixing portion, and the second conductive member is connected to the fixing structure through the second fixing portion.
采用上述技术方案,本申请具有如下有益效果:Adopting the above-mentioned technical scheme, the application has the following beneficial effects:
本申请提供的基于电机的电性测量装置通过第一导电件和第二导电件分别与电机的转轴和和壳体接触,能够改善接触效果,减小测试误差;并且通过传导件将电机的轴电流的测试点引到安全区域,能够提高人员安全性。The electrical property measuring device based on the motor provided by the present application is in contact with the rotating shaft and the housing of the motor respectively through the first conductive member and the second conductive member, which can improve the contact effect and reduce the test error; and the shaft of the motor is connected by the conductive member. The test point of the current is led to a safe area, which can improve the safety of personnel.
附图说明Description of drawings
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.
图1为本申请实施例一种基于电机的电性测量装置的结构示意图;1 is a schematic structural diagram of a motor-based electrical property measuring device according to an embodiment of the present application;
图2为本申请实施例一种基于电机的电性测量装置的第一导电件的结构示意图。FIG. 2 is a schematic structural diagram of a first conductive member of a motor-based electrical property measuring device according to an embodiment of the present application.
以下对附图作补充说明:The following supplementary descriptions are provided for the accompanying drawings:
1-第一导电件;2-第二导电件;3-第一传导件;4-第二传导件;5-固定结构;6-壳体;7-转轴;8-第一接触部。1-first conductive member; 2-second conductive member; 3-first conductive member; 4-second conductive member; 5-fixed structure; 6-shell; 7-rotating shaft; 8-first contact portion.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.
此处所称的“一个实施例”或“实施例”是指可包含于本申请至少一个实现方式中的特定特征、结构或特性。在本申请实施例的描述中,需要理解的是,术语“上”、“下”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本申请和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本申请的限制。此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含的包括一个或者更多个该特征。而且,术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施。Reference herein to "one embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. In the description of the embodiments of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, only It is for the convenience of describing the present application and to simplify the description, rather than indicating or implying that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. Also, the terms "first," "second," etc. are used to distinguish between similar objects, and are not necessarily used to describe a particular order or precedence. It is to be understood that data so used may be interchanged under appropriate circumstances so that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.
请参见图1,图1为本申请实施例一种基于电机的电性测量装置的示意图,包括电机、测量器、第一导电件1、第二导电件2、第一传导件3、第二传导件4和固定结构5;测量器可以为万用表、电流表或电压表等能够直接或间接获得电机的电流、电压、电阻等的仪器,下面以测量器为万用表测量电机的轴电流为例;Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a motor-based electrical property measuring device according to an embodiment of the application, including a motor, a measuring device, a first
电机包括壳体6和转轴7;The motor includes a
固定结构5固定于壳体6上,第一导电件1的第一端和第二导电件2的第一端分别与固定结构5可拆卸连接,第一导电件1的第二端与壳体6连接,第二导电件2的第二端与转轴7连接;The fixing
固定结构5为绝缘体,根据电机的不同,可以制作相应固定结构5,固定结构5需要为绝缘体的原因是防止轴电流会通过固定结构5流动,再使用万用表测量时,将影响测量结果。其中,第一导电件1和第二导电件2均为弹性导电件;第一导电件1和第二导电件2均可以为弹性铜片;The fixed
将其中一弹性铜片压在转轴7上,并施加一定的压力,使弹性铜片能够稳定地和转轴7面相接触。弹性铜片上设置多个弹性触点(图1中所示为3个),可以避免因转轴7表面测试点粗糙度不同而带来的误差;同时,弹性薄铜片与转轴7接触面积要远大于万用表笔和转轴7的接触面积,进一步改善接触效果,减小测试误差。Press one of the elastic copper sheets on the
第一传导件3的一端与第一导电件1连接,第一传导件3的另一端与测量器的第一端连接;One end of the first conducting
第二传导件4的一端与第二导电件2连接,第二传导件4的另一端与测量器的第二端连接。第一传导件3和第二传导件4均可以为铜导线;通过铜导线将测试点引出到安全距离以外的区域,测试人员使用万用表的两支表笔,测量铜导线两端的电流,即可得到轴电流值。One end of the second conducting
本申请实施例的基于电机的电性测量装置既可以用于测量电机的轴电流、也可以用于测量电压、电阻等其他电性特征,本装置也可用于其他领域。The motor-based electrical property measuring device of the embodiments of the present application can be used to measure the shaft current of the motor, and can also be used to measure other electrical properties such as voltage and resistance, and the device can also be used in other fields.
本申请实施例中,第一导电件1包括至少一个第一接触部8,至少一个第一接触部8与壳体6连接;In the embodiment of the present application, the first
第二导电件2包括至少一个第二接触部,至少一个第二接触部与转轴7连接。The second
本申请实施例中,固定结构5与壳体6固定的方式有多种,下面简要介绍其中的若干种:In the embodiment of the present application, there are various ways of fixing the fixing
第一种可实施的方案中,该基于电机的电性测量装置包括紧固件,固定结构5与壳体6通过紧固件可拆卸连接;可选的,紧固件为可以用于固定的螺栓或螺母等,固定结构5通过螺栓或螺母等固定于电机壳体6上。In a first feasible solution, the motor-based electrical property measuring device includes fasteners, and the fixing
第二种可实施的方案中,固定结构5与壳体6粘接,可选的,固定结构5可以用胶水等胶黏性物质粘贴于壳体6上。In a second feasible solution, the fixing
第三种可实施的方案中,固定结构5与壳体6卡接,可选的,壳体6上设有第一卡接部,固定结构5上设有第二卡接部,固定结构5通过第一卡接部和第二卡接部与壳体6卡接。In a third possible solution, the fixing
本申请实施例中,固定结构上设有第一固定部,第一导电件1通过第一固定部与固定结构5连接。第一导电件1与固定结构5连接的方式也可以有多种,可以为卡接、粘接、螺栓连接等。In the embodiment of the present application, the fixing structure is provided with a first fixing portion, and the first
本申请实施例中,固定结构上设有第二固定部,第二导电件2通过第二固定部与固定结构5连接。第二导电件2与固定结构5连接的方式也可以有多种,可以为卡接、粘接、螺栓连接等。In the embodiment of the present application, the fixing structure is provided with a second fixing portion, and the second
基于上文的方案下面介绍若干种实施方案。Based on the above solutions, several implementations are described below.
实施例1:Example 1:
请参见图1,图1为本申请实施例一种基于电机的电性测量装置的示意图,包括电机、测量器、第一导电件1、第二导电件2、第一传导件3、第二传导件4和固定结构5;其中测量器选择万用表;Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a motor-based electrical property measuring device according to an embodiment of the application, including a motor, a measuring device, a first
电机包括壳体6和转轴7;The motor includes a
固定结构5固定于壳体6上,第一导电件1的第一端和第二导电件2的第一端分别与固定结构5可拆卸连接,第一导电件1的第二端与壳体6连接,第二导电件2的第二端与转轴7连接;The fixing
固定结构5为绝缘体,其中,第一导电件1和第二导电件2均为弹性导电件;第一导电件1和第二导电件2均为弹性铜片;The fixing
将其中一弹性铜片压在转轴7上,并施加一定的压力,使弹性铜片能够稳定地和转轴7面相接触。弹性铜片上设置多个弹性触点(图1中所示为3个),可以避免因转轴7表面测试点粗糙度不同而带来的误差;同时,弹性薄铜片与转轴7接触面积要远大于万用表笔和转轴7的接触面积,进一步改善接触效果,减小测试误差。Press one of the elastic copper sheets on the
第一传导件3的一端与第一导电件1连接,第一传导件3的另一端与测量器的第一端连接;One end of the first conducting
第二传导件4的一端与第二导电件2连接,第二传导件4的另一端与测量器的第二端连接。第一传导件3和第二传导件4均为铜导线;通过铜导线将测试点引出到安全距离以外的区域,测试人员使用万用表的两支表笔,测量铜导线两端的电流,即可得到轴电流值。One end of the second conducting
本申请实施例中,第一导电件1包括3个第一接触部8,3第一接触部8与壳体6连接;In the embodiment of the present application, the first
第二导电件2包括3个第二接触部,3个第二接触部与转轴7连接。The second
本申请实施例中,该基于电机的电性测量装置包括紧固件,固定结构5与壳体6通过紧固件可拆卸连接;可选的,固定结构5通过螺栓固定于电机壳体6上。In the embodiment of the present application, the motor-based electrical measuring device includes fasteners, and the fixing
本申请实施例中,固定结构上设有第一固定部,第一导电件1通过第一固定部与固定结构5连接。第一导电件1与固定结构5通过螺栓连接。In the embodiment of the present application, the fixing structure is provided with a first fixing portion, and the first
本申请实施例中,固定结构上设有第二固定部,第二导电件2通过第二固定部与固定结构5连接。第二导电件2与固定结构5通过螺栓连接。In the embodiment of the present application, the fixing structure is provided with a second fixing portion, and the second
实施例2:Example 2:
本申请实施例提供一种基于电机的电性测量装置的示意图,包括电机、测量器、第一导电件1、第二导电件2、第一传导件3、第二传导件4和固定结构5;其中测量器选择万用表;An embodiment of the present application provides a schematic diagram of a motor-based electrical property measurement device, including a motor, a measuring device, a first
电机包括壳体6和转轴7;The motor includes a
固定结构5固定于壳体6上,第一导电件1的第一端和第二导电件2的第一端分别与固定结构5可拆卸连接,第一导电件1的第二端与壳体6连接,第二导电件2的第二端与转轴7连接;The fixing
固定结构5为绝缘体,其中,第一导电件1和第二导电件2均为弹性导电件;第一导电件1和第二导电件2均为弹性铜片;The fixing
将其中一弹性铜片压在转轴7上,并施加一定的压力,使弹性铜片能够稳定地和转轴7面相接触。弹性铜片上设置多个弹性触点(图1中所示为3个),可以避免因转轴7表面测试点粗糙度不同而带来的误差;同时,弹性薄铜片与转轴7接触面积要远大于万用表笔和转轴7的接触面积,进一步改善接触效果,减小测试误差。Press one of the elastic copper sheets on the
第一传导件3的一端与第一导电件1连接,第一传导件3的另一端与测量器的第一端连接;One end of the first conducting
第二传导件4的一端与第二导电件2连接,第二传导件4的另一端与测量器的第二端连接。第一传导件3和第二传导件4均为铜导线;通过铜导线将测试点引出到安全距离以外的区域,测试人员使用万用表的两支表笔,测量铜导线两端的电流,即可得到轴电流值。One end of the second conducting
本申请实施例中,第一导电件1包括3个第一接触部8,3第一接触部8与壳体6连接;In the embodiment of the present application, the first
第二导电件2包括3个第二接触部,3个第二接触部与转轴7连接。The second
本申请实施例中,固定结构5可以用胶水等胶黏性物质粘贴于壳体6上。In the embodiment of the present application, the fixing
本申请实施例中,固定结构上设有第一固定部,第一导电件1通过第一固定部与固定结构5连接。第一导电件1与固定结构5通过螺栓连接。In the embodiment of the present application, the fixing structure is provided with a first fixing portion, and the first
本申请实施例中,固定结构上设有第二固定部,第二导电件2通过第二固定部与固定结构5连接。第二导电件2与固定结构5通过螺栓连接。In the embodiment of the present application, the fixing structure is provided with a second fixing portion, and the second
以上仅为本申请的较佳实施例,并不用以限制本申请,凡在本申请的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本申请的保护范围之内。The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. Inside.
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