CN117250555A - Method, system and electronic equipment for testing short circuit between motor stator bar strands - Google Patents
Method, system and electronic equipment for testing short circuit between motor stator bar strands Download PDFInfo
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- CN117250555A CN117250555A CN202311229402.4A CN202311229402A CN117250555A CN 117250555 A CN117250555 A CN 117250555A CN 202311229402 A CN202311229402 A CN 202311229402A CN 117250555 A CN117250555 A CN 117250555A
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- 238000012360 testing method Methods 0.000 title claims abstract description 197
- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000001514 detection method Methods 0.000 claims description 16
- 230000003993 interaction Effects 0.000 claims description 15
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000004020 conductor Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000009954 braiding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000007103 stamina 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- 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
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The application discloses a method, a system and electronic equipment for testing short circuit among motor stator bar strands, and belongs to the technical field of motor testing. The method comprises the steps that in response to a test instruction, a processor sends test voltage to a voltage regulator, so that the test voltage output by the voltage regulator is applied to a stator bar to be tested through a control circuit; a first electrode of the test voltage is applied to one strand of the electronic bar, and a second electrode of the test voltage is applied to at least one of the other strands of the electronic bar except for the one strand; the processor acquires a test result fed back by the control circuit and displays information of the test result; the test result comprises: and determining a short circuit result between the strands based on the comparison of the current value flowing through the one strand and the preset current value. Based on the method and the device, the short circuit test between the stator bar strands can be realized rapidly, and the test result is accurate and reliable.
Description
Technical Field
The application belongs to the technical field of motor testing, and particularly relates to a method, a system and electronic equipment for testing short circuits among motor stator bar strands.
Background
The conductor of the motor stator bar is formed by braiding a plurality of electromagnetic wires (namely, stranded wires), and the surface of each electromagnetic wire is covered with an insulating layer. The conductor of the stator bar is required to ensure that the insulation between any 2 strands has certain strength so as to ensure that the stator bar meets the operation requirement. In order to eliminate the short circuit condition between conductor strands of the stator bar, a manual root-by-root measurement mode is adopted at present, which specifically comprises the following steps: any 2 strands are connected by a stylus pen loaded with specified voltage, and whether short circuit conditions exist among conductor strands of the stator bar is judged by whether audible and visual alarm prompt occurs.
The strands of the motor stator bar are more, whether the insulation between any 2 strands is good or not is tested by a manual mode, and the operation process needs careful stamina of operators; in the long-term detection process, the condition that short circuit is not detected due to manual test omission inevitably exists; under certain special requirements, the voltage withstand requirement of 5-10 s is required to be applied when each group of short circuit tests are needed, the test time is multiplied by adopting the traditional manual root-by-root test method, and the traditional manual test method is almost impossible to realize.
The traditional strand-by-strand short circuit test method judges whether a short circuit exists or not by manually judging whether an audible and visual alarm exists during the test, and can not accurately record the short circuit condition, and the manual recording also has error recording and leakage recording conditions, so that the recording and the rechecking are not facilitated.
Disclosure of Invention
The embodiment of the application provides a method, a system and electronic equipment for testing short circuits among motor stator bar strands, which can solve the problem of low accuracy of test results of the existing test means.
In a first aspect, an embodiment of the present application provides a method for testing a short circuit between strands of a stator of an electric machine, where the method includes:
responding to a test instruction, and sending a test voltage to a voltage regulator by a processor, so that the test voltage output by the voltage regulator is applied to a stator bar to be tested through a control circuit; a first electrode of the test voltage is applied to one strand of the electronic bar, and a second electrode of the test voltage is applied to at least one of the other strands of the electronic bar except for the one strand;
the processor acquires a test result fed back by the control circuit and displays information of the test result; the test result comprises: and determining a short circuit result between the strands based on the comparison of the current value flowing through the one strand and the preset current value.
Further, before the processor sends the test voltage to the voltage regulator, the method further includes:
the processor acquires a detection signal of the control circuit, wherein the detection signal is used for detecting whether the wiring terminal and the wire rod strand form a loop or not; if a loop is formed, sending a test voltage to a voltage regulator;
the connecting terminals are at least two, one connecting terminal is connected with the first electrode, and the other connecting terminals are connected with the second electrode.
Further, the application of the second electrode of the test voltage to at least one of the other strands of the electronic bar except the one strand comprises:
if the second electrode is applied to at least two strands, the at least two strands are connected in parallel.
Further, the information of the test result comprises at least one of test normal, short-circuit strand number and audible and visual alarm
In a second aspect, an embodiment of the present application provides a system for testing short circuits between strands of a stator of an electric machine, the system comprising:
the human-computer interaction interface is used for acquiring a test instruction and test parameters and sending the test instruction to the processor; the device is also used for displaying a test result;
the processor is used for receiving the test instruction, acquiring test parameters based on the test instruction and sending the test parameters to the control circuit;
the control circuit is used for sending target test voltage in the test parameters to the voltage regulator, receiving the test voltage output by the voltage regulator and applying the test voltage to the stator bar to be tested;
the voltage regulator is used for regulating voltage and outputting test voltage based on the received target test voltage instruction;
the electrode comprises a first electrode and a second electrode, and is used for connecting a test voltage with a to-be-tested stator bar strand through a wiring terminal, wherein the first electrode is applied to one strand of an electronic bar, and the second electrode of the test voltage is applied to at least one strand of the electronic bar except the one strand.
Further, the control circuit is further configured to:
and receiving a test instruction of the processor, analyzing the test instruction of the processor to determine test time, and sending test voltage with duration time not less than the test time to the wiring terminal.
Further, the system also includes a power supply that provides operating voltages to the voltage regulator and the processor, respectively.
Further, the control circuit is further configured to:
receiving a test instruction of the processor, sending a detection signal to the wiring terminal to detect whether the wiring terminal and the wire rod strand form a loop or not, and sending a detection result to the processor.
Further, the other strands applied by the second electrode are connected in parallel.
In a third aspect, an embodiment of the present application provides an electronic device, where the system is installed on the electronic device.
In the embodiment of the application, the test parameters set by the tester are obtained, the corresponding test voltage is output based on the voltage regulator, the test voltage is applied to the electronic bar to be tested through the control circuit, the first electrode of the test voltage is applied to one strand, the second voltage is applied to at least one of the other strands, the short circuit condition between one strand and the other strands can be realized through one-time test, and the test efficiency is greatly improved. And the detected short-circuit fault can be clearly displayed on a human-computer interaction interface, so that the accuracy and the testing efficiency of the testing result are improved.
Drawings
Fig. 1 is a schematic flow chart of a method for testing short circuit between stator strands of a motor according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of motor connection in a first strand short circuit test in a method for testing short circuit between motor stator strands according to an embodiment of the present application;
fig. 3 is a schematic diagram of motor connection in a second strand short circuit test in a method for testing short circuit between motor stator strands according to an embodiment of the present application;
fig. 4 is a schematic diagram of motor connection in a third strand short circuit test in the method for testing short circuit between motor stator strands according to the embodiment of the present application;
fig. 5 is a schematic diagram of motor connection in an nth strand short circuit test in a method for short circuit testing between motor stator strands according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a short circuit test system between strands of a motor stator according to an embodiment of the present application.
In the figure, a power supply 1, a voltage regulator 2, a control circuit 3, a processor 4, a man-machine interaction interface 5, a printer 6, a wiring terminal 7, a first electrode 71 and a second electrode 72.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The method, the system and the electronic equipment for testing the short circuit between the stator bar strands of the motor provided by the embodiment of the application are described in detail through specific embodiments and application scenes of the specific embodiments with reference to the accompanying drawings.
Fig. 1 illustrates a method for testing short circuits between stator strands of a motor, which may be performed by an electronic device, which may include a terminal device or a test tool, according to one embodiment of the present invention. In other words, the method may be performed by a processor installed on a terminal device, the method comprising the steps of:
s1, responding to a test instruction, and sending a test voltage to a voltage regulator by a processor, so that the test voltage output by the voltage regulator is applied to a stator bar to be tested through a control circuit; the first electrode of the test voltage is applied to one strand of the electronic wire rod to be tested, and the second electrode of the test voltage is applied to at least one strand of the electronic wire rod to be tested except the one strand;
s2, the processor acquires a test result fed back by the control circuit and displays information of the test result; the test result comprises: and determining a short circuit result between the strands based on the comparison of the current value flowing through the one strand and the preset current value.
In step S1, before the processor sends the test voltage to the voltage regulator, the method further includes:
the processor acquires a detection signal of the control circuit, wherein the detection signal is used for detecting whether the wiring terminal and the wire rod strand form a loop or not; if a loop is formed, sending a test voltage to a voltage regulator;
the connecting terminals are at least two, one connecting terminal is connected with the first electrode, and the other connecting terminals are connected with the second electrode.
Wherein the first electrode and the second electrode represent two electrodes of the test voltage, namely a positive electrode and a negative electrode.
The application of the second electrode of the test voltage to at least one of the other strands of the electronic bar except the one strand comprises: if the second electrode is applied to at least two strands, the at least two strands are connected in parallel.
For example, as shown in fig. 2-5, the first electrode is taken as an anode:
the short circuit test flow is as follows:
(1) the 1 st strand is separated from all other strands, the 1 st strand is connected with the first electrode, the 1 st strand is used as an anode terminal, and the other strands are used as cathode terminals (namely, the other strands are connected in parallel), so that a short circuit test is carried out. If no short circuit exists, the step (2) is directly carried out; if short circuit occurs during test, the 1 st strand is used as an anode terminal, and the other strands are used as a cathode terminal and the 1 st strand in turn for instantaneous voltage withstand test so as to determine the strand number of the short circuit with the 1 st strand.
(2) And (3) after the short-circuit test of the 1 st strand is finished, removing the 1 st strand, and carrying out the short-circuit test on the 2 nd and 3 … n strands in the mode of step 1 until all strands finish the short-circuit test in the mode.
In step S2, the information of the test result includes at least one of the test normal, the short-circuit strand number and the audible and visual alarm.
In step S2, the preset current value calculates the corresponding current threshold according to the sizes of the bars of the different motor units, and when testing, the control circuit sets the different current thresholds for detection. Similarly, the test voltage is correspondingly set through the test parameters based on the requirements of different units.
As shown in fig. 6, the embodiment of the application further provides a system for testing short circuit between motor stator strands, which comprises a power supply 1, a voltage regulator 2, a control circuit 3, a processor 4, a man-machine interaction interface 5, a printer 6, a wiring terminal 7, a first electrode 71 and a second electrode 72.
The power supply 1 is used to provide an operating voltage for the system.
The man-machine interaction interface 5 is used for acquiring a test instruction and a test parameter and sending the test instruction to the processor; the device is also used for displaying a test result; the printer 6 is connected with the man-machine interaction interface and is used for printing test results.
The processor 4 is connected with the man-machine interaction interface 5 and the control circuit 3, and the processor 4 is used for receiving the test instruction, acquiring test parameters based on the test instruction and sending the test parameters to the control circuit. The processor may be a CPU.
The processor 4 stores a test program written according to a test principle, and outputs test instructions according to the program. And (5) carrying out operation processing on the received feedback signals, generating and storing test results, and outputting the test results to 5. The method specifically comprises the following steps: storing and running a custom-developed test program; receiving test parameters transmitted by the man-machine interaction interface 5; transmitting various control signals to the control circuit 3; receiving various detection signals transmitted by the control circuit 3; and calculating and storing test data, and transmitting test results to the human-computer interaction interface 5.
The control circuit 3 is connected with the voltage regulator 2 and the wiring terminal 7, and the control circuit 3 is used for sending target test voltage in the test parameters to the voltage regulator, receiving the test voltage output by the voltage regulator and applying the test voltage to the stator bar to be tested; the control circuit may be a microcontroller, a CPLD (Complex Programmable Logic Device ) or an FPGA (Field Programmable Gate Array, field programmable gate array).
The control circuit 3 is also configured to:
and receiving a test instruction of the processor, analyzing the test instruction of the processor to determine test time, and sending test voltage with duration time not less than the test time to the wiring terminal.
The control circuit 3 is also configured to:
receiving a test instruction of the processor, sending a detection signal to the wiring terminal to detect whether the wiring terminal and the wire rod strand form a loop or not, and sending a detection result to the processor.
And the voltage regulator 2 is used for voltage regulation and outputting test voltage based on the received target test voltage command.
The electrodes comprise a first electrode 71 and a second electrode 72 and are used for connecting a test voltage with the strands of the stator bar to be tested through a wiring terminal, wherein the first electrode is applied to one strand of the electronic bar, and the second electrode of the test voltage is applied to at least one strand of the electronic bar except the one strand.
The connection terminal 7 serves as a connection path between the control circuit 3 and the strands, separates each strand connection portion of the bar, applies the test voltage output from the voltage regulator 2 to the strand-designated strand, and transmits a signal fed back from the strand to the control circuit 3.
The workflow of the system of the present application may be: after the power supply 1 is started, an operator inputs test parameters at the man-machine interaction interface 5 and transmits the test parameters to the CPU4. The bar strands are connected to the connection terminals 7, and the control circuit 3 feeds back detection signals of the strand connections to the connection terminals 7 to the CPU4. The CPU4 processes the operation to judge whether the strand and the wiring terminal 7 are connected to form a loop. If no loop is formed, the strand number which is not connected with the wiring terminal 7 is displayed on the man-machine interaction interface 5, and an alarm prompt is given. After confirming that the strand is connected with the wiring terminal 7 to form a loop, the CPU4 outputs a set test voltage value, and transmits the set test voltage value to the voltage regulator 2 through the control/feedback circuit 3, and the voltage regulator 2 regulates and outputs the test voltage according to the target test voltage value. The control circuit 3 outputs test instructions according to the CPU4, performs short circuit test on the strands one by one, and feeds back test results to the CPU4. The CPU4 processes the test result, stores the test result, and transmits the test result to the man-machine interaction interface 5. The man-machine interaction interface 5 displays the test result in a specified form, if the inter-strand short circuit occurs, an audible and visual alarm is sent out, and the fault strand number is displayed on the man-machine interaction interface 5. The printer 6 outputs a test report.
According to the method, after the strands are connected with the equipment through the inter-strand short circuit test equipment, a test program is started, inter-strand test is automatically carried out, signals such as voltage and current are collected in real time, insulation states among the strands are automatically recorded and analyzed, strand numbers of the inter-strand short circuit are accurately judged and recorded, test results are stored in a specified database, the test results are displayed on a human-computer interface, and a test report is output.
The short circuit test process among the strands of the wire rod is convenient, reliable, efficient and safe, the automation degree is high, the test parameters can be adjusted according to the requirements, the test results are stored in the database, and the database can be inquired at any time, so that the short circuit test results have traceability.
The application also provides electronic equipment, and the electronic equipment is provided with the system.
The electronic device in the embodiment of the application comprises: a server, a terminal, or other devices besides a terminal.
It should be noted that, in this document, 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 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. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (10)
1. A method for testing short circuit between strands of a stator of an electric machine, the method comprising:
responding to a test instruction, and sending a test voltage to a voltage regulator by a processor, so that the test voltage output by the voltage regulator is applied to a stator bar to be tested through a control circuit; the first electrode of the test voltage is applied to one strand of the electronic wire rod to be tested, and the second electrode of the test voltage is applied to at least one strand of the electronic wire rod to be tested except the one strand;
the processor acquires a test result fed back by the control circuit and displays information of the test result; the test result comprises: and determining a short circuit result between the strands based on the comparison of the current value flowing through the one strand and the preset current value.
2. The method of claim 1, wherein before the processor sends the test voltage to the voltage regulator, further comprising:
the processor acquires a detection signal of the control circuit, wherein the detection signal is used for detecting whether the wiring terminal and the wire rod strand form a loop or not; if a loop is formed, sending a test voltage to a voltage regulator;
the connecting terminals are at least two, one connecting terminal is connected with the first electrode, and the other connecting terminals are connected with the second electrode.
3. The method of claim 1, wherein the application of the second electrode of the test voltage to at least one of the other strands of the electronic bar than the one strand comprises:
if the second electrode is applied to at least two strands, the at least two strands are connected in parallel.
4. The method of claim 1, wherein the information of the test results includes at least one of test normal, short-circuit strand number, and audible and visual alarm.
5. A system for testing short circuits between strands of a stator of an electric machine, the system comprising:
the human-computer interaction interface is used for acquiring a test instruction and test parameters and sending the test instruction to the processor; the device is also used for displaying a test result;
the processor is used for receiving the test instruction, acquiring test parameters based on the test instruction and sending the test parameters to the control circuit;
the control circuit is used for sending target test voltage in the test parameters to the voltage regulator, receiving the test voltage output by the voltage regulator and applying the test voltage to the stator bar to be tested;
the voltage regulator is used for regulating voltage and outputting test voltage based on the received target test voltage instruction;
the electrode comprises a first electrode and a second electrode, and is used for connecting a test voltage with a to-be-tested stator bar strand through a wiring terminal, wherein the first electrode is applied to one strand of an electronic bar, and the second electrode of the test voltage is applied to at least one strand of the electronic bar except the one strand.
6. The system of claim 5, wherein the control circuit is further configured to:
and receiving a test instruction of the processor, analyzing the test instruction of the processor to determine test time, and sending test voltage with duration time not less than the test time to the wiring terminal.
7. The system of claim 5, further comprising a power supply that provides an operating voltage to the voltage regulator and the processor, respectively.
8. The system of claim 5, wherein the control circuit is further configured to:
receiving a test instruction of the processor, sending a detection signal to the wiring terminal to detect whether the wiring terminal and the wire rod strand form a loop or not, and sending a detection result to the processor.
9. The system of claim 5, wherein the other strands applied by the second electrode are connected in parallel.
10. An electronic device having the system of any one of claims 5-9 mounted thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311229402.4A CN117250555A (en) | 2023-09-22 | 2023-09-22 | Method, system and electronic equipment for testing short circuit between motor stator bar strands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311229402.4A CN117250555A (en) | 2023-09-22 | 2023-09-22 | Method, system and electronic equipment for testing short circuit between motor stator bar strands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117250555A true CN117250555A (en) | 2023-12-19 |
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ID=89132598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311229402.4A Pending CN117250555A (en) | 2023-09-22 | 2023-09-22 | Method, system and electronic equipment for testing short circuit between motor stator bar strands |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117250555A (en) |
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2023
- 2023-09-22 CN CN202311229402.4A patent/CN117250555A/en active Pending
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