CN116679203A - Method and device for detecting geometric neutral line of direct-current motor - Google Patents
Method and device for detecting geometric neutral line of direct-current motor Download PDFInfo
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- CN116679203A CN116679203A CN202310484327.XA CN202310484327A CN116679203A CN 116679203 A CN116679203 A CN 116679203A CN 202310484327 A CN202310484327 A CN 202310484327A CN 116679203 A CN116679203 A CN 116679203A
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000004804 winding Methods 0.000 claims abstract description 32
- 230000005284 excitation Effects 0.000 claims abstract description 24
- 230000005672 electromagnetic field Effects 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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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
- G01R31/343—Testing dynamo-electric machines in operation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The application discloses a method and a device for detecting the geometric neutral line of a direct current motor, which comprises the following steps: step S100: connecting an alternating current power supply to the main excitation winding; step S200: connecting an electron tube voltmeter to the electric brush, and measuring the induced electromotive force of the electric brush through the electron tube voltmeter; step S300: and (3) by adjusting the position of the electric brush, finding out the position with the minimum electric brush induced electromotive force, and determining the position with the minimum electric brush induced electromotive force as the geometric neutral line of the direct current motor. The application changes the traditional direct current power supply into the alternating current power supply to be connected to the main excitation winding, and finds the position with minimum electric brush induced electromotive force by continuously adjusting the position of the electric brush, and determines the position as the geometric neutral line of the direct current motor.
Description
Technical Field
The application relates to the technical field of motors, in particular to a method and a device for detecting a geometric neutral line of a direct current motor.
Background
The geometric neutral line of the brush refers to the position of the brush when the energy on the commutator reaches the maximum induced electromotive force during no-load operation of the exciting current and the rotating speed of the direct current motor. And when the brushes deviate from the neutral position, the commutator commutation will advance or retard. If the position deviation is too large, a large no-load spark is generated by the motor when the commutator enters the main pole magnetic flux area. Therefore, the brushes of the direct current motor must be strictly controlled in the geometric neutral line position, i.e. in the magnetic pole neutral line, to prevent the commutation effect from being affected, to avoid the occurrence of severe sparks and even the occurrence of the phenomenon of reverse polarity during operation.
In the prior art, the geometric neutral line of the electric brush of the direct-current motor is measured by adopting a direct-current induction method in engineering, namely, an armature winding is static, excitation winding is separately excited, and the excitation current of the motor is frequently switched on and off for measurement. However, the dc induction method is often affected by the stability and reliability of the power supply, and the readings at the moment of switching on and off the power supply are also deviated, so that the geometric neutral line position of the dc motor measured by the method is not particularly accurate.
Disclosure of Invention
The application aims to solve the technical problems that: the prior art has difficulty in accurately detecting the geometric neutral position of a direct current motor.
In order to solve the technical problems, the application provides a method and a device for detecting a geometric neutral line of a direct current motor, comprising the following steps:
step S100: connecting an alternating current power supply to the main excitation winding;
step S200: connecting an electron tube voltmeter to the electric brush, and measuring the induced electromotive force of the electric brush through the electron tube voltmeter;
step S300: and (3) finding out the position with minimum brush induced electromotive force by adjusting the position of the brush, and determining the position with minimum brush induced electromotive force as the geometric neutral line of the direct current motor.
Further, in the step S100, the method specifically includes:
connecting an alternating current power supply with a voltage value of 110V-220V to two ends of the main excitation winding through wires;
and starting the alternating current power supply to electrify the main excitation winding.
Further, in the step S200, the method specifically includes:
connecting the electron tube voltmeter to the two ends of the electric brush through wires;
and gradually moving the electric brush to be close to the main excitation winding, and determining the position of the first reading of the valve voltmeter as the initial position of the electric brush.
Further, in the step S300, the method specifically includes:
starting to adjust the electric brush to be positioned at different positions from the initial position of the electric brush, and recording the induced electromotive force of the position of the electric brush each time;
and screening out the minimum induced electromotive force from all the recorded induced electromotive forces, finding out the position of the electric brush corresponding to the minimum induced electromotive force, and determining the position of the electric brush as the geometric neutral line of the direct current motor.
In one embodiment of the application, the application provides an apparatus for detecting a geometric neutral of a DC motor, comprising:
an alternating current power supply;
the main excitation winding is connected to the alternating current power supply;
the electric brush is arranged in an electromagnetic field generated by the main excitation winding;
and the electron tube voltmeter is connected to the electric brush and is used for detecting the induced electromotive force of the electric brush.
Further, the alternating current power supply adopts an alternating current power supply with a voltage value of 110V-220V.
Compared with the prior art, the method and the device for detecting the geometric neutral line of the direct current motor have the beneficial effects that:
the application changes the traditional direct current power supply into the alternating current power supply to be connected to the main excitation winding, and finds the position with minimum electric brush induced electromotive force by continuously adjusting the position of the electric brush, and determines the position as the geometric neutral line of the direct current motor.
Drawings
FIG. 1 is a general flow diagram of a method for detecting a geometric neutral of a DC motor in accordance with an embodiment of the present application;
FIG. 2 is a schematic illustration of a first flow chart of a method for detecting a geometric neutral of a DC motor according to an embodiment of the present application;
FIG. 3 is a second flow chart of a method for detecting a geometric neutral of a DC motor according to an embodiment of the present application;
FIG. 4 is a schematic illustration of a third flow chart of a method for detecting a geometric neutral line of a DC motor according to an embodiment of the present application;
FIG. 5 is a schematic view showing the composition of an apparatus for detecting the geometric neutral of a DC motor according to an embodiment of the present application;
fig. 6 is a schematic circuit diagram of an apparatus for detecting a geometric neutral of a dc motor in accordance with an embodiment of the present application.
In the figure, 1, an alternating current power supply; 2. a main excitation winding; 3. a brush; 4. a valve voltmeter.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
The terms "", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "", "second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, in an embodiment of the present application, there is provided a method of detecting a geometric neutral line of a dc motor, including: step S100: connecting an alternating current power supply 1 to a main excitation winding 2; step S200: a valve voltmeter 4 is connected to the electric brush 3, and the induced electromotive force of the electric brush 3 is measured through the valve voltmeter 4; step S300: and (3) by adjusting the position of the electric brush 3, finding out the position with minimum induced electromotive force of the electric brush 3, and determining the position with minimum induced electromotive force of the electric brush 3 as the geometric neutral line of the direct current motor.
Furthermore, the application changes the traditional direct current power supply into the alternating current power supply 1 to be connected to the main excitation winding 2, and finds the position with minimum induced electromotive force of the electric brush 3 by continuously adjusting the position of the electric brush 3, and determines the position as the geometric neutral line of the direct current motor.
As shown in fig. 2, in an embodiment of the present application, there is provided a method for detecting a geometric neutral line of a dc motor, and in the step S100, the method specifically includes: connecting an alternating current power supply 1 with a voltage value of 110V-220V to two ends of the main excitation winding 2 through wires; and starting the alternating current power supply 1 to electrify the main excitation winding 2.
Specifically, an ac power source 1 with a voltage value of 110V-220V is connected to two ends of the main exciting winding 2 through a wire, and the ac power source 1 is turned on to perform an energizing operation on the main exciting winding 2, so that the main exciting winding 2 generates an electromagnetic field.
As shown in fig. 3, in an embodiment of the present application, there is provided a method for detecting a geometric neutral line of a dc motor, and in the step S200, the method specifically includes: connecting a valve voltmeter 4 to two ends of the electric brush 3 through wires; by gradually moving the brush 3 closer to the main exciting winding 2, the position where the valve voltmeter 4 has a reading for the first time is determined as the initial position of the brush 3.
Specifically, the valve voltmeter 4 is connected to two ends of the brush 3 through a wire, the brush 3 and the main exciting winding 2 are placed on the same plane, the brush 3 is moved in the horizontal direction, the brush 3 is gradually close to the position of the main exciting winding 2, in the moving process of the brush 3, until the valve voltmeter 4 has a reading display, and the position where the valve voltmeter 4 has a reading is determined to be the initial position of the brush 3.
As shown in fig. 4, in an embodiment of the present application, there is provided a method for detecting a geometric neutral line of a dc motor, and in the step S300, the method specifically includes: starting to adjust the position of the electric brush 3 from the initial position of the electric brush 3, positioning the electric brush 3 at different positions, and recording the induced electromotive force of the position of the electric brush 3 each time; and screening out the minimum induced electromotive force from all the recorded induced electromotive forces, finding out the position of the electric brush 3 corresponding to the minimum induced electromotive force, and determining the position of the electric brush 3 as the geometric neutral line of the direct current motor.
Specifically, the position of the brush 3 is gradually adjusted from the initial position of the brush 3, so that the brush 3 is located at different positions, the induced electromotive force of the position of the brush 3 is recorded at the same time, after the induced electromotive forces of all the positions are recorded, the minimum induced electromotive force is screened out from all the recorded induced electromotive forces, the position of the brush 3 corresponding to the minimum induced electromotive force is found, and the position of the brush 3 is determined to be the geometric neutral line of the direct current motor.
As shown in fig. 5-6, in one embodiment of the present application, the present application provides an apparatus for detecting a geometric neutral of a dc motor, comprising: an alternating current power supply 1; a main exciting winding 2 connected to the ac power supply 1; a brush 3 disposed in an electromagnetic field generated by the main exciting winding 2; and a valve voltmeter 4 connected to the brush 3, the valve voltmeter 4 detecting an induced electromotive force of the brush 3.
In an embodiment of the application, a device for detecting the geometric neutral line of a direct current motor is provided, wherein the alternating current power supply 1 adopts an alternating current power supply 1 with a voltage value of 110V-220V.
In summary, an embodiment of the present application provides a method and an apparatus for detecting a geometric neutral line of a dc motor, including: step S100: connecting an alternating current power supply 1 to a main excitation winding 2; step S200: a valve voltmeter 4 is connected to the electric brush 3, and the induced electromotive force of the electric brush 3 is measured through the valve voltmeter 4; step S300: and (3) by adjusting the position of the electric brush 3, finding out the position with minimum induced electromotive force of the electric brush 3, and determining the position with minimum induced electromotive force of the electric brush 3 as the geometric neutral line of the direct current motor. The application changes the traditional direct current power supply into the alternating current power supply 1 to be connected to the main excitation winding 2, and finds the position with minimum induced electromotive force of the electric brush 3 by continuously adjusting the position of the electric brush 3, and determines the position as the geometric neutral line of the direct current motor.
Finally, it should be noted that: it will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
The foregoing is merely an example of the present application and is not intended to limit the scope of the present application, and all changes made in the structure according to the present application should be considered as falling within the scope of the present application without departing from the gist of the present application. It will be clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above and the related description may refer to the corresponding process in the foregoing method embodiment, which is not repeated here.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus/apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus/apparatus.
Thus far, the technical solution of the present application has been described in connection with the further embodiments shown in the drawings, but it is readily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application.
Claims (6)
1. A method of detecting a geometric neutral of a dc motor, comprising:
step S100: connecting an alternating current power supply to the main excitation winding;
step S200: connecting an electron tube voltmeter to the electric brush, and measuring the induced electromotive force of the electric brush through the electron tube voltmeter;
step S300: and (3) finding out the position with minimum brush induced electromotive force by adjusting the position of the brush, and determining the position with minimum brush induced electromotive force as the geometric neutral line of the direct current motor.
2. The method for detecting the geometric neutral line of a dc motor according to claim 1, wherein in step S100, specifically comprising:
connecting an alternating current power supply with a voltage value of 110V-220V to two ends of the main excitation winding through wires;
and starting the alternating current power supply to electrify the main excitation winding.
3. The method for detecting the geometric neutral line of a dc motor according to claim 1, wherein in step S200, specifically comprising:
connecting the electron tube voltmeter to the two ends of the electric brush through wires;
and gradually moving the electric brush to be close to the main excitation winding, and determining the position of the first reading of the valve voltmeter as the initial position of the electric brush.
4. The method for detecting the geometric neutral line of a dc motor according to claim 1, wherein in step S300, specifically comprising:
starting to adjust the electric brush to be positioned at different positions from the initial position of the electric brush, and recording the induced electromotive force of the position of the electric brush each time;
and screening out the minimum induced electromotive force from all the recorded induced electromotive forces, finding out the position of the electric brush corresponding to the minimum induced electromotive force, and determining the position of the electric brush as the geometric neutral line of the direct current motor.
5. An apparatus for detecting a geometric neutral of a dc motor, comprising:
an alternating current power supply;
the main excitation winding is connected to the alternating current power supply;
the electric brush is arranged in an electromagnetic field generated by the main excitation winding;
and the electron tube voltmeter is connected to the electric brush and is used for detecting the induced electromotive force of the electric brush.
6. A method and apparatus for detecting a geometric neutral of a DC motor as claimed in claim 5, wherein,
the alternating current power supply adopts an alternating current power supply with the voltage value of 110V-220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310484327.XA CN116679203A (en) | 2023-04-26 | 2023-04-26 | Method and device for detecting geometric neutral line of direct-current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310484327.XA CN116679203A (en) | 2023-04-26 | 2023-04-26 | Method and device for detecting geometric neutral line of direct-current motor |
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| Publication Number | Publication Date |
|---|---|
| CN116679203A true CN116679203A (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310484327.XA Pending CN116679203A (en) | 2023-04-26 | 2023-04-26 | Method and device for detecting geometric neutral line of direct-current motor |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253686A (en) * | 2018-10-26 | 2019-01-22 | 华侨大学 | A kind of direct current motor brush location calibration device |
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- 2023-04-26 CN CN202310484327.XA patent/CN116679203A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253686A (en) * | 2018-10-26 | 2019-01-22 | 华侨大学 | A kind of direct current motor brush location calibration device |
Non-Patent Citations (1)
| Title |
|---|
| 孙启建: "用交流励磁电压测定直流电动机电刷中性线的方法", 电机技术, no. 2, 29 February 2016 (2016-02-29), pages 56 - 57 * |
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