Inserted line stator detection system of fan motor

Abstract

The utility model relates to the technical field of motor detection, in particular to an inserted line stator detection system of a fan motor, which comprises a control cabinet, and an integrated tester, a voltage regulator, a boosting transformer, a pulse module and a PLC (programmable logic controller) control module are mounted in the control cabinet; the workbench is provided with a steering rod, a storage rack and a clamping assembly, the storage rack is installed on the workbench, the steering rod is installed on the storage rack, and the steering rod is connected to the integrated tester and the PLC control module through a first test line; the clamping assembly is installed on the workbench and is connected between the integrated tester and the coil inserting stator. And an industrial personal computer is mounted on the operation table. According to the utility model, a main body structure of the voltage regulator and the boosting transformer is adopted, and the voltage output and the current protection value of the equipment are controlled according to the detection voltage withstand requirement and the leakage current requirement of the coil-inserted stator, so that the highest 10kV voltage withstand test of the coil-inserted stator is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor detection technical field, concretely relates to a fan motor's embedded wire stator detection system. BACKGROUND

[0002] The ventilation cooling fan for rail transit provides cooling air volume heat dissipation for the normal operation of electrical elements such as traction motor, converter, transformer and the like, and the embedded wire stator is an important component of the motor driving the fan to operate, and the insulation reliability, the qualification of direct current resistance and the correctness of phase sequence are the prerequisite for ensuring the safe and reliable operation of the fan. The electrical performance of the embedded wire stator is detected, such as three-phase cold-state direct current resistance detection, ground insulation, phase-to-phase insulation and turn-to-turn insulation voltage resistance detection and phase sequence detection, so as to ensure that the embedded wire stator has correct number of turns, correct embedded wire, correct winding head and tail connection method, qualified main insulation and turn-to-turn insulation of the embedded wire stator and correct rotation of the motor. The stable operation of the motor with the fan is ensured, and the motor is not burned due to insulation problems, so the test and detection of the embedded wire stator are particularly important.

[0003] At present, the detection method for the embedded wire stator after manufacturing is completed is that: the dispersion test instrument is used to detect each test item point respectively: handheld resistance meter, handheld insulation meter, turn-to-turn / ground / phase-to-phase voltage resistance tester. The test method for the phase sequence of the embedded wire stator is to detect by using a handheld dummy rotor, the rotating part of which is close to the inner circle center of the embedded wire stator, three-phase winding is connected with three-phase alternating current of not more than 100V, and the phase sequence correctness of the embedded wire stator is determined by manually observing the rotation direction of the rotating part of the dummy rotor. The direct current resistance value needs to be manually converted to the standard temperature for manual qualification determination, manual filling of detection records and manual issuance of detection reports.

[0004] Under the current technical conditions, the embedded wire stator detection has the following problems: low safety; the dummy rotor cannot be put into the embedded wire stator with small size during phase sequence testing; manual observation of waveform coincidence degree during turn-to-turn insulation voltage resistance detection without quantitative index; with the increase of the severity of product application environment, the insulation voltage test index of the embedded wire stator in the developed new product project is increased to more than 5kV, the current insulation voltage test capability cannot meet the design technical requirements, and during the embedded wire stator detection, all test contents cannot be completed by one-time wiring, and only one test can be completed at one time, the test efficiency is not high, and the production demand cannot be met. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a fan motor's embedded wire stator detection system to solve the technical problem that the insulation voltage test device in the prior art cannot meet the insulation voltage test index of the embedded wire stator of more than 5kV, and the specific technical scheme is as follows:

[0006] The utility model provides a stator wire embedding detection system for a fan motor, comprising:

[0007] A control cabinet is installed with an integrated tester, a voltage regulator, a step-up transformer, a pulse module and a PLC control module, and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer and the pulse module;

[0008] A workbench, the workbench being provided with a steering rod, a storage rack, and a clamping assembly. The storage rack is mounted on the workbench, the steering rod is mounted on the storage rack, and the steering rod is connected to the integrated tester and the PLC control module via a first test line. The clamping assembly is mounted on the workbench and connected between the integrated tester and the wire-inserting stator.

[0009] An operating table is provided with an industrial computer, which is connected to the PLC control module.

[0010] A further improvement of the wire-embedded stator detection system for the fan motor of the present invention is that an oscilloscope card is further installed in the control cabinet, and the oscilloscope card is connected to the industrial computer.

[0011] A further improvement of the wire-embedded stator detection system for a fan motor of the present invention is that the number of the workbenches is at least two, and the two workbenches are arranged at intervals in the test site.

[0012] A further improvement of the wire-embedded stator detection system of the fan motor of the present invention is that the clamping assembly includes a first clamp-shaped crocodile clip and a second clamp-shaped crocodile clip, the first clamp-shaped crocodile clip is connected to the wire-embedded stator through a second test line, and the second clamp-shaped crocodile clip is connected to the wire-embedded stator through a third test line.

[0013] A further improvement of the wire-embedded stator detection system of the fan motor of the present invention is that a temperature sensor is provided outside the control cabinet, and the temperature sensor is connected to the integrated tester.

[0014] A further improvement of the wire-embedded stator detection system for a fan motor of the utility model is that the operating table is further provided with a display and a printer, and the display and the printer are connected to the industrial computer.

[0015] A further improvement of the wire-embedded stator detection system of the fan motor of the present invention is that the detection system also includes a safety door and an audible and visual alarm, and the lock switch on the safety door and the audible and visual alarm are connected to the PLC control module in the control cabinet.

[0016] A further improvement of the wire-embedded stator detection system of the fan motor of the utility model is that the detection system further comprises a storage rack for storing the steering rods.

[0017] A further improvement of the embedded wire stator detection system of the fan motor of the present invention is that a switching switch for switching lines is provided in the control cabinet, and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer and the pulse module through the switching switch.

[0018] A further improvement of the wire-embedded stator detection system of the fan motor of the utility model is that a heat dissipation fan is provided on the cabinet door of the control cabinet.

[0019] The application of the technical solution of the utility model has the following beneficial effects:

[0020] This utility model utilizes a voltage regulator and step-up transformer as the main structure. Based on the stator's withstand voltage and leakage current requirements, the device's voltage output and current protection value are controlled to achieve withstand voltage testing up to 10kV on the stator. This solves the technical problem of existing insulation withstand voltage testing devices failing to meet the insulation withstand voltage assessment criteria of motor stators above 5kV. With a single wiring connection, the system can simultaneously complete all required test items on two stator test objects. The console allows for the entire test process, including operational monitoring, data entry, testing, automatic recording, automatic calculation, automatic qualification determination, abnormality alarms, and automatic storage of test data. Combined with a printer, it can automatically generate and print reports, thus ensuring the quality of the stator.

[0021] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the structure of the stator wire embedded detection system of the fan motor of the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the stator wire embedded detection system of the fan motor of the utility model. Figure 2 ;

[0025] Figure 3 This is a schematic structural diagram of the safety door of the wire-embedded stator detection system of the fan motor of the utility model;

[0026] Figure 4This is a schematic diagram of the connection relationship of the wire-embedded stator detection system of the fan motor of the utility model;

[0027] Figure 5 The utility model is a schematic diagram of a voltage regulator and a step-up transformer of a wire-embedded stator detection system of a fan motor.

[0028] Among them, 1. Operating table; 2. Industrial computer; 3. Workbench; 4. Embedded wire stator; 5. Steering rod; 6. Storage rack; 7. Control cabinet; 8. Lock switch; 9. Safety door; 10. Temperature sensor. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] See also Figures 1 to 5 As shown in the figure, a detection system for the wire-embedded stator 4 of a fan motor includes: a control cabinet 7, in which an integrated tester, a voltage regulator, a step-up transformer, a pulse module and a PLC (programmable logic controller) control module are installed, and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer and the pulse module; a workbench 3, on which a steering rod 5, a storage rack and a clamping assembly are provided, and the storage rack is installed on the workbench 3, and the steering rod 5 is installed on the storage rack, and the steering rod 5 is connected to the integrated tester and the PLC control module through a first test line, and the clamping assembly is installed on the workbench 3 and connected between the integrated tester and the wire-embedded stator 4; an operating table 1, on which an industrial computer 2 is installed, and the industrial computer 2 is connected to the PLC control module.

[0031] Specifically, such as Figure 4 As shown, the integrated tester in the control cabinet 7 is connected to the PLC control module via a switch; the voltage regulator + step-up transformer is connected to the high-voltage pulse module and the switch, and the PLC control module is further connected to the switch; when the oscilloscope card (oscilloscope) is 5kV to 10kV interturn withstand voltage, in order to detect voltage and time data acquisition and convert it into a waveform display, the high-voltage pulse module is connected to the oscilloscope card via a step-down acquisition module, and then connected to the operating console 1 (industrial computer 2) via communication. The experimental operation test is carried out by the industrial computer 2.

[0032] like Figure 5As shown in the figure, a 220V voltage is input into the voltage regulator and transformer, directly obtaining a 10kV power frequency output, or further passing through the high-voltage pulse generation circuit to obtain a 10kV inter-turn output. This voltage regulator is a single-phase voltage regulator. The utility model adopts the main structure of a single-phase voltage regulator + step-up transformer to achieve a 10kV inter-turn withstand voltage function. This function uses the principle of high-frequency and high-voltage series resonance of capacitors + resistors + inductors to generate high-voltage shock waves to simulate overvoltage shock waves in the four three-phase windings of the embedded stator. The faulty coil is identified by comparing the waveforms of the two coils displayed on the storage oscilloscope.

[0033] In this embodiment, the integrated tester combines the AN96951 model stator comprehensive tester and a voltage regulator. It has a high degree of integration and is placed in the control cabinet 7. It is used for DC resistance detection, insulation resistance detection, ground withstand voltage test, phase-to-phase withstand voltage test, turn-to-turn withstand voltage test, and embedded stator 4-phase sequence detection. The voltage regulator is used in combination with a step-up transformer to output the required voltage for 5kV to 10kV withstand voltage test. The high-voltage pulse module is used to generate high-voltage pulses and control the circuit during turn-to-turn withstand voltage. The high-voltage pulse module is made of a PCB circuit board according to the actual number of connections required and the product test withstand voltage standard requirements. The product test withstand voltage range is between 5 and 30kV. The PLC control module is used for all logic control, logic interlocking protection control, safety protection control, and collection of relevant parameters of the test and detection system.

[0034] Preferably, an oscilloscope card is installed in the control cabinet 7, and the oscilloscope card is connected to the industrial computer 2. The oscilloscope card is used to collect the inter-turn withstand voltage waveform.

[0035] Preferably, Figure 1 and Figure 2 As shown, there are at least two workbenches 3 , which are arranged at intervals in the test site, and the embedded stator 4 is placed on the tooling test bench position of the workbench 3 , so as to complete two tests at the same time with one wiring.

[0036] Preferably, the clamping assembly includes a first alligator clip and a second alligator clip. The first alligator clip is connected to the stator 4 through a second test line, and the second alligator clip is connected to the stator 4 through a third test line. The second and third test lines are hung on the workbench 3. During testing, the second and third test lines are removed, and the first alligator clip on the second test line is connected to one of the stator 4 lead lines, and the second alligator clip on the third test line is connected to another stator 4 lead line. Specifically, the second test line is a low-voltage test line with a voltage below 5kV. The low-voltage test line and the alligator clip connected to the low-voltage test line are led out from the bottom of the control cabinet 7. The first alligator clip (red corresponds to phase A, yellow corresponds to phase B, and green corresponds to phase C) is installed in place with the three-phase lead lines of the stator 4. The three-phase DC resistance test, the ground, phase-to-phase and turn-to-turn withstand voltage test (below 5kV) and the insulation resistance test can be completed at one time. The third test line is a high-voltage test line, which can be used with the second clamp-shaped alligator clip to complete the ground, phase-to-phase and turn-to-turn withstand voltage tests above 5kV to 10kV.

[0037] Preferably, a temperature sensor 10 is provided outside the control cabinet 7 , and the temperature sensor 10 is connected to the integrated tester and is used for detecting temperature data during three-phase cold DC resistance detection.

[0038] Preferably, the operating table 1 is also provided with a display and a printer, which are connected to the industrial computer 2, and the printer is used to print the test report. All operations and displays are performed and displayed on the operating table 1. The operating table 1 is mainly equipped with an anti-static table, an industrial computer 2, a display, a keyboard and a mouse. The test software program is installed in the industrial computer 2 and is used for controlling the entire test process, managing test data and outputting test reports. The control cabinet 7 is connected to the industrial computer 2 by a communication line. During the test, the system program sets three levels of authority protection (tester, test administrator, system administrator), and the corresponding series of parameters can be set for different specifications and models of embedded stators 4.

[0039] Preferably, the detection system further comprises a safety door 9 and an audible and visual alarm, and the lock switch 8 on the safety door 9 and the audible and visual alarm are connected to the PLC control module in the control cabinet (7). The safety door 9 is connected to the lock switch 8. When the safety door 9 of the test site is in the open state, the warning light of the main interface of the software program goes out, and the power frequency withstand voltage test is terminated at the same time to ensure the personal safety of personnel who enter the test area. An audible and visual alarm is set in the detection area. After the test starts, an alarm is automatically sounded to remind the operator to pay attention to safety. The safety door 9 and the audible and visual alarm remind the operator to pay attention to safety. When a person breaks in abnormally, the door switch of the safety door 9 is disconnected, and the withstand voltage test is automatically interrupted, thereby ensuring the safety of the personnel.

[0040] Preferably, the detection system also includes a storage rack 6 for storing the steering rods 5, ensuring that the steering rods 5 are arranged neatly and the site is tidy. The first test line connected to the steering rod 5 is led out from the bottom of the control cabinet 7 and connected to the steering rod 5. The steering rod 5 is used to detect the rotation direction of the embedded stator 4. There are two steering rods 5. The two steering rods 5 are respectively placed in the iron core of the embedded stator 4 on the two workbenches 3. After starting the test program, the rotation direction of the embedded stator 4 can be detected: clockwise, counterclockwise, and not rotating. The test principle is that a 24V three-phase industrial frequency AC voltage is passed through the three-phase winding (phase A, phase B, phase C), and a three-phase rotating magnetic field is generated in the embedded stator 4. The steering rod 5 (with a built-in Hall element) detects the rotation direction of the magnetic field. Different voltage signals are generated for different rotation directions to perform rotation detection.

[0041] Preferably, a switch for switching circuits is provided in the control cabinet 7, and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer, and the pulse module via the switch. The switch is used to switch between different circuits and test points in the control cabinet 7 to complete the test point detection.

[0042] Preferably, a cooling fan is provided on the door of the control cabinet 7. Specifically, the control cabinet 7 integrates relevant electrical equipment, mainly including test equipment, switching switches, high-voltage pulse modules and some auxiliary protective electronic components. The power line is input from the bottom of the side of the control cabinet 7. An insulating plate is installed at the bottom of the control cabinet 7. All test lines are output through the lower insulating plate of the control cabinet 7 to ensure smooth on-site lines. The cooling fan installed on the cabinet door enables it to have good ventilation and heat dissipation functions to ensure the normal operation of electrical equipment. The control cabinet 7 mainly integrates an integrated tester, a voltage regulator and a step-up transformer, a high-voltage pulse module, a switching switch, an oscilloscope card, and a PLC control module.

[0043] When testing the fan motor's embedded stator 4, ensure the 380V power switch on the control cabinet 7 is turned on, the console 1 is powered on, and the test program is started. After confirming the printer is online, the operator can transfer the two embedded stators 4 to two workbenches 3, attach the first pliers-shaped alligator clips to the three-phase lead wires of the embedded stators 4 on the two workbenches 3, and place the two steering rods 5 within the inner circle of the embedded stators 4 on the two workbenches 3. Then, exit and close the safety door 9. At this point, communication between the control cabinet 7 and the console 1 is normal, and the sound and light alarm is operating. In the test program interface on the console 1, follow the prompts to enter the embedded stator 4 test parameters: embedded stator 4 model, DC resistance upper and lower limits, judgment standard, withstand voltage value, withstand voltage leakage current standard value, interturn voltage value, interturn waveform deviation value, rotation direction standard, and test time, and save them for easy access and subsequent testing. On the test program interface, call up the product model information: Enter the number of the wire-inserted stator 4 on one workbench 3 at Station 1, and the number of the wire-inserted stator 4 on another workbench 3 at Station 2. Select the test items and start the command. All selected test items for the wire-inserted stator 4 on both stations 1 and 2 will be automatically completed at once. The test program automatically compares the test results against the set standard values ​​and automatically determines whether they pass or fail. A test report is automatically generated on the main interface of Workbench 1 and can be printed to a printer. After the test is completed, open the safety door 9, and the lock switch 8 on the safety door 9 trips, terminating the test. The operator can safely enter the test area and remove the wire-inserted stator 4. If the technical requirement is a withstand voltage of 5kV to 10kV, place the wire-inserted stator 4 on any workbench 3, attach the second alligator clip connecting the high-voltage test lead to the three-phase lead wires of the wire-inserted stator 4, select the withstand voltage test item on the test program interface, and select the 10kV test requirement to complete the withstand voltage test.

[0044] The present invention utilizes a voltage regulator and step-up transformer as the main structure. This system controls the device's voltage output and current protection value based on the stator's withstand voltage and leakage current requirements to achieve a maximum withstand voltage test of 10kV. This solves the technical problem of existing insulation withstand voltage testing devices failing to meet the insulation withstand voltage assessment criteria of 5kV or higher for motor stators. This system can simultaneously complete all required test items for two stators (4) in a single connection. The operating console (1) manages the entire test process, including operational monitoring, data entry, testing, automatic recording, automatic calculation, automatic qualification determination, abnormality alarms, and automatic storage of test data. Combined with a printer, it can automatically generate and print reports, thus ensuring the quality of the stator.

[0045] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wind turbine motor stator wire embedded detection system, characterized in that: include: A control cabinet (7), wherein an integrated tester, a voltage regulator, a step-up transformer, a pulse module, and a PLC control module are installed in the control cabinet (7), and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer, and the pulse module; A workbench (3), wherein a steering rod (5), a storage rack, and a clamping assembly are provided on the workbench (3); the storage rack is mounted on the workbench (3); the steering rod (5) is mounted on the storage rack; the steering rod (5) is connected to the integrated tester and the PLC control module via a first test line; the clamping assembly is mounted on the workbench (3) and connected between the integrated tester and the wire-inserting stator (4); An operating table (1) is provided with an industrial computer (2) installed on the operating table (1), and the industrial computer (2) is connected to the PLC control module.

2. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: An oscilloscope card is also installed in the control cabinet (7), and the oscilloscope card is connected to the industrial computer (2).

3. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: The number of the workbenches (3) is at least two, and the two workbenches (3) are arranged at intervals in the test site.

4. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: The clamping assembly comprises a first clamp-shaped crocodile clip and a second clamp-shaped crocodile clip, wherein the first clamp-shaped crocodile clip is connected to the wire-inserted stator (4) via a second test line, and the second clamp-shaped crocodile clip is connected to the wire-inserted stator (4) via a third test line.

5. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: A temperature sensor (10) is provided outside the control cabinet (7), and the temperature sensor (10) is connected to the integrated tester.

6. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: The operating table (1) is also provided with a display and a printer, and the display and the printer are connected to the industrial computer (2).

7. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: The detection system further comprises a safety door (9) and an audible and visual alarm, wherein the lock switch (8) of the safety door (9) and the audible and visual alarm are connected to a PLC control module in the control cabinet (7).

8. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: The detection system further comprises a storage rack (6) for storing the steering rod (5).

9. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: A switching switch for switching lines is provided in the control cabinet (7), and the PLC control module is connected to the integrated tester, the voltage regulator, the step-up transformer and the pulse module via the switching switch.

10. The wind turbine motor stator wire embedded detection system according to claim 1, characterized in that: A heat dissipation fan is provided on the cabinet door of the control cabinet (7).

Images