Device for automatically measuring number of turns of remanufactured motor winding

Abstract

The utility model discloses an automatic measuring device for the number of turns of a remanufactured motor winding, which relates to the technical field of remanufactured motors and comprises a base, a driving motor, a rotor module, a jacking and positioning module and a data acquisition system, the driving motor is mounted on the base, an output shaft of the driving motor is connected with one end of the rotor module, and the other end of the rotor module is connected with the jacking and positioning module. The other end of the rotor module abuts against the jacking and positioning module, the jacking and positioning module is installed on the base, the rotor module is of an assembly structure, the outer diameter of the rotor module can be adjusted, the periphery of the rotor module is used for being sleeved with the stator winding, and the lower end of the stator winding is movably connected to the base and can move in the length direction of the base. And the data acquisition system is used for acquiring back electromotive force signals generated in the stator winding in real time. According to the utility model, the number of turns of the remanufactured motor stator winding can be automatically and accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of remanufactured motors, in particular to an automatic measuring device for the number of turns of a remanufactured motor winding. Background Technique

[0002] A remanufactured motor refers to the process of disassembling, inspecting, cleaning, repairing, replacing parts, reassembling and testing a used motor through remanufacturing processes to restore it to its original or higher performance level. During the remanufacturing process of a motor, the accurate measurement of the number of turns of the stator winding is crucial. The number of turns of the stator winding not only directly affects the design and performance of the motor, but also has a significant impact on cost control and efficiency improvement in remanufacturing.

[0003] Traditional methods for measuring the number of turns of a stator winding mainly rely on manual counting and empirical judgment. This method has the following disadvantages: (1) Low efficiency: The manual counting process is cumbersome, time-consuming, and requires disassembling the motor. Especially when dealing with a large number of motors, it is difficult to meet the requirements of industrial production; (2) Large error: Manual counting is prone to human errors, resulting in inaccurate measurement results and thus affecting the motor performance; (3) Poor repeatability: The counting results of different operators may vary greatly, lacking consistency and repeatability. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an automatic measuring device for the number of turns of a remanufactured motor winding to solve the problems existing in the above-mentioned prior art and be able to automatically and accurately measure the number of turns of the stator winding of a remanufactured motor.

[0005] To achieve the above purpose, the utility model provides the following scheme:

[0006] The utility model provides an automatic measuring device for the number of turns of a remanufactured motor winding, including a base, a driving motor, a rotor module, a tightening and positioning module, and a data acquisition system. The driving motor is installed on the base, and the output shaft of the driving motor is connected to one end of the rotor module. The other end of the rotor module abuts against the tightening and positioning module. The tightening and positioning module is installed on the base. The rotor module is an assembled structure, and the outer diameter of the rotor module can be adjusted. The outer circumference of the rotor module is used for sleeving the stator winding. The lower end of the stator winding is movably connected to the base and can move along the length direction of the base. The data acquisition system is used to collect the back electromotive force signal generated in the stator winding in real time.

[0007] Preferably, a linear guide rail is provided at the upper end of the base. A carriage is slidably connected to the linear guide rail. A standard block is installed at the upper end of the carriage, and the upper end of the standard block is used for installing the stator winding.

[0008] Preferably, the rotor module includes a rotating shaft, a rotor core, a plurality of wedge bars, and a plurality of permanent magnets. One end of the rotating shaft is used to connect to the output shaft of the driving motor, and the other end of the rotating shaft is used to abut against the pressing and positioning module. The rotor core is sleeved on the outer periphery of the rotating shaft, and a plurality of wedge-shaped grooves are circumferentially arranged on the outer wall of the rotor core. The extending direction of the wedge-shaped grooves is consistent with the axial direction of the rotating shaft. The wedge-shaped grooves, the wedge bars, and the permanent magnets correspond one by one. The wedge bars are inserted into the wedge-shaped grooves, and the permanent magnets are detachably installed on the side of the wedge bars away from the rotor core, and the polarities of adjacent permanent magnets are opposite.

[0009] Preferably, the pressing and positioning module includes a hydraulic cylinder and a support frame. The driving motor is installed at one end of the upper surface of the base, the support frame is installed at the other end of the upper surface of the base, the hydraulic cylinder is installed on the support frame, and the output shaft of the hydraulic cylinder presses against one end of the rotating shaft.

[0010] Preferably, the data acquisition system includes a display screen, a data storage unit, a voltage sensor, and a microcontroller. The voltage sensor is used to collect the back electromotive force signal generated in the stator winding in real time. The microcontroller is used to calculate the number of turns of the stator winding according to the back electromotive force signal. The display screen is used to display the turn calculation result obtained by the microcontroller in real time. The data storage unit is used to store and record the turn calculation result obtained by the microcontroller.

[0011] The present invention has achieved the following technical effects compared with the prior art:

[0012] The automatic measuring device for the number of turns of the remanufactured motor winding provided by the present invention has the driving motor installed on the base, and the output shaft of the driving motor is connected to one end of the rotor module. The other end of the rotor module abuts against the pressing and positioning module to realize the axial limit of the rotor module. The outer periphery of the rotor module is used to sleeve the stator winding. When the driving motor starts, it can drive the rotor module to rotate at a constant speed. During the rotation of the rotor module, the rotor module continuously cuts the magnetic force lines of the stator winding, causing the magnetic flux in the stator winding to change, and then generating an induced electromotive force, that is, the back electromotive force, in the stator winding. Moreover, the magnitude of the back electromotive force is proportional to the rotation speed of the rotor module, the number of turns of the stator winding, and the magnetic flux change rate. The pressing and positioning module is installed on the base. The rotor module is an assembled structure, and the outer diameter of the rotor module can be adjusted. The lower end of the stator winding is movably connected to the base and can move along the length direction of the base. The data acquisition system is used to collect the back electromotive force signal generated in the stator winding in real time, calculate the number of turns of the stator winding according to the back electromotive force signal, realize the automatic measurement of the number of turns of the stator winding and the collection of data, without being interfered by the outside world, and improve the measurement accuracy and reliability. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of an automatic measuring device for the number of turns of a remanufactured motor winding in the present invention;

[0015] Figure 2 It is a schematic diagram of the cooperation between the rotor module and the stator winding in the present invention;

[0016] Figure 3 It is a schematic structural diagram of the rotor module in the present invention;

[0017] In the figure: 1 - driving motor, 2 - rotor module, 21 - rotating shaft, 22 - rotor core, 23 - wedge bar, 24 - permanent magnet, 3 - stator winding, 4 - hydraulic cylinder, 5 - data acquisition system, 6 - carriage, 7 - standard block. Detailed implementation manners

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] The purpose of the present invention is to provide an automatic measuring device for the number of turns of a remanufactured motor winding to solve the problems existing in the prior art and be able to automatically and accurately measure the number of turns of the stator winding of a remanufactured motor.

[0020] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0021] Such as Figures 1 - 3As shown in the figure, this embodiment provides an automatic measuring device for the number of turns of a remanufactured motor winding, which includes a base, a driving motor 1, a rotor module 2, a tightening and positioning module, and a data acquisition system 5. The driving motor 1 is installed on the base, and the output shaft of the driving motor 1 is connected to one end of the rotor module 2. The other end of the rotor module 2 abuts against the tightening and positioning module to realize the axial limit of the rotor module 2. The outer circumference of the rotor module 2 is used to sleeved with the stator winding 3. When the driving motor 1 starts, it can drive the rotor module 2 to rotate at a constant speed. During the rotation of the rotor module 2, the rotor module 2 continuously cuts the magnetic field lines of the stator winding 3, causing the magnetic flux in the stator winding 3 to change. According to Faraday's law of electromagnetic induction, an induced electromotive force, that is, a back electromotive force, will be generated in the stator winding 3, and the magnitude of the back electromotive force is proportional to the rotation speed of the rotor module 2, the number of turns of the stator winding 3, and the magnetic flux change rate. The tightening and positioning module is installed on the base. The rotor module 2 is an assembled structure, and the outer diameter of the rotor module 2 can be adjusted. The lower end of the stator winding 3 is movably connected to the base and can move along the length direction of the base. The data acquisition system 5 is used to collect the back electromotive force signal generated in the stator winding 3 in real time, calculate the number of turns of the stator winding 3 according to the back electromotive force signal, realize the automatic measurement of the number of turns of the stator winding 3 and the collection of data, without being interfered by the outside world, and improve the measurement accuracy and reliability.

[0022] Specifically, a linear guide rail is provided at the upper end of the base. A carriage 6 is slidably connected to the linear guide rail. A standard block 7 is installed at the upper end of the carriage 6. The upper end of the standard block 7 is used to install the stator winding 3. By reciprocating the carriage 6 on the linear guide rail, the standard block 7 is driven to drive the stator winding 3 to slide, so as to realize position adjustment and facilitate installation.

[0023] The rotor module 2 includes a rotating shaft 21, a rotor core 22, a plurality of wedge-shaped bars 23 and a plurality of permanent magnets 24. One end of the rotating shaft 21 is used to connect to the output shaft of the driving motor 1, and the other end of the rotating shaft 21 is used to abut against the tightening and positioning module. The rotor core 22 is sleeved on the outer periphery of the rotating shaft 21, and a plurality of wedge-shaped grooves are evenly arranged in the circumferential direction on the outer wall of the rotor core 22. The extending direction of the wedge-shaped grooves is consistent with the axial direction of the rotating shaft 21. The wedge-shaped grooves, the wedge-shaped bars 23 and the permanent magnets 24 correspond one by one. The wedge-shaped bars 23 are inserted into the wedge-shaped grooves to ensure tight fit and reliable fixation, which is convenient for disassembly and assembly. And in the actual application process, according to the stator windings 3 with different inner diameters, the wedge-shaped bars 23 with different sizes can be replaced, so that the rotor module 2 can quickly adapt to the stator windings 3 with different inner diameters, without the need to design different rotor modules for different stator windings, improving flexibility and scope of application. At the same time, it also reduces the complexity and operation difficulty of the device. The permanent magnets 24 can be detachably installed on the side of the wedge-shaped bars 23 far from the rotor core 22, and the polarities of adjacent permanent magnets 24 are opposite, that is, the polarities of the permanent magnets 24 are arranged alternately along the circumference of the rotor core 22 (NS poles alternate), generating a stable and strong alternating magnetic field, ensuring the stability and strength of the back electromotive force signal, and improving the accuracy and reliability of the turn number measurement.

[0024] The tightening and positioning module includes a hydraulic cylinder 4 and a support frame. The driving motor 1 is installed at one end of the upper surface of the base, the support frame is installed at the other end of the upper surface of the base, the hydraulic cylinder 4 is installed on the support frame, and the output shaft of the hydraulic cylinder 4 abuts against one end of the rotating shaft 21 to prevent the rotor module 2 from jumping during rotation, which affects the measurement.

[0025] The data acquisition system 5 includes a display screen, a data storage unit, a voltage sensor and a microcontroller. The voltage sensor is a high-precision voltage sensor and is used to collect the back electromotive force signal generated in the stator windings 3 in real time. The microcontroller is used to calculate the number of turns of the stator windings 3 according to the back electromotive force signal using the back electromotive force formula. The display screen is used to display the turn number calculation result obtained by the microcontroller in real time. The data storage unit is used to store and record the turn number calculation result obtained by the microcontroller for subsequent analysis and verification.

[0026] The back electromotive force formula is

[0027] where E is the measured back electromotive force, N is the number of turns of the stator windings 3, is the magnetic flux change rate (the magnetic flux change rate is determined by the rotation speed and magnetic field strength of the rotor module 2).

[0028] On the premise of knowing the rotation speed and magnetic field strength of the rotor module 2, through the measured back electromotive force value, the number of turns N of the stator windings 3 can be deduced.

[0029] The usage steps of this embodiment are as follows:

[0030] S1. Device initialization: Start the automatic measurement device for the number of turns of the remanufactured motor winding in this embodiment and perform self-check to ensure that all sensors, drive motor 1, and data acquisition system 5 can work normally;

[0031] S2. Rotation of rotor module 2: Start drive motor 1 and control the rotor to rotate at a constant speed, and the rotation speed can be set and adjusted as needed;

[0032] S3. Back electromotive force measurement: The voltage sensor collects the back electromotive force signal generated in stator winding 3 in real time. To improve the measurement accuracy, a data acquisition system 5 with a high sampling rate can be used;

[0033] S4. Data processing and calculation: The microcontroller receives the collected back electromotive force signal, performs data processing and noise filtering. Combining the known rotation speed and magnetic flux change rate, the microcontroller calculates the number of turns of stator winding 3 using the back electromotive force formula;

[0034] S5. Result display and recording: The calculation result is displayed in real time through the display screen for easy viewing by the operator, and the measurement data is automatically recorded in the data storage unit to support subsequent data analysis and verification.

[0035] In this embodiment, the number of turns is measured automatically, eliminating the cumbersome steps of manual operation, without the need to disassemble the motor, which can greatly improve the measurement efficiency and achieve fast and continuous measurement.

[0036] In this embodiment, by adopting the design of permanent magnets 24 with alternating NS poles, it is ensured that the generated back electromotive force signal is stable and strong. Combining with a high-precision voltage sensor and a data processing system, it can effectively filter noise and improve the measurement accuracy.

[0037] In this embodiment, by adopting the rotor structure design with a split wedge groove insertion method, different inner diameters of stator winding 3 can be quickly adapted by replacing wedge blocks of different sizes.

[0038] In this embodiment, the split wedge block design enables the wedge block to be quickly replaced, and the installation and debugging processes are simple and the operation is convenient.

[0039] In this embodiment, by firmly fixing the wedge block in the wedge groove in a mechanical fixing manner, it is ensured that it will not loosen or shift during high-speed rotation, maintaining the balance and stability of rotor module 2.

[0040] The design concept of this embodiment is to measure the number of turns using the electrical signals generated during the operation of the motor, specifically including:

[0041] (1) Fixed rotor design: The rotor module is designed as a fixed structure, with permanent magnets installed on the rotor core, and the rotor module is driven to rotate by an external drive motor;

[0042] (2) Magnetic field generation and induction: The permanent magnet on the rotor core generates an alternating magnetic field during rotation, inducing a back electromotive force;

[0043] (3) Voltage measurement circuit: The voltage sensor measures the back electromotive force signal in the stator winding in real time and transmits the data to the data acquisition system;

[0044] (4) Turns calculation and display: The data acquisition system calculates the number of turns of the stator winding according to the measured back electromotive force signal through the back electromotive force formula, and displays and records the result.

[0045] In the present utility model, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An automatic measuring device for the number of turns of a remanufactured motor winding, characterized in that: It includes a base, a driving motor, a rotor module, a tightening and positioning module and a data acquisition system, the driving motor is installed on the base, and the output shaft of the driving motor is connected to one end of the rotor module, the other end of the rotor module is abutted against the tightening and positioning module, the tightening and positioning module is installed on the base, the rotor module is an assembled structure, and the outer diameter of the rotor module can be adjusted, the outer periphery of the rotor module is used to cover the stator winding, the lower end of the stator winding is movably connected to the base and can move along the length direction of the base, and the data acquisition system is used to collect the back electromotive force signal generated in the stator winding in real time.

2. The automatic measuring device for the number of turns of the remanufactured motor winding according to claim 1 is characterized in that: A linear guide is provided at the upper end of the base, a carriage is slidably connected to the linear guide, a standard block is installed at the upper end of the carriage, and the upper end of the standard block is used to install the stator winding.

3. The automatic measuring device for the number of turns of the remanufactured motor winding according to claim 1 is characterized in that: The rotor module includes a rotating shaft, a rotor core, a plurality of wedge bars and a plurality of permanent magnets. One end of the rotating shaft is used to connect the output shaft of the driving motor, and the other end of the rotating shaft is used to abut against the top-tightening positioning module. The rotor core is sleeved on the outer circumference of the rotating shaft, and a plurality of wedge grooves are circumferentially provided on the outer wall of the rotor core. The extension direction of the wedge grooves is consistent with the axial direction of the rotating shaft. The wedge grooves, the wedge bars and the permanent magnets correspond one to one. The wedge bars are inserted into the wedge grooves. The permanent magnets can be detachably installed on the side of the wedge bars away from the rotor core, and the polarities of adjacent permanent magnets are opposite.

4. The automatic measuring device for the number of turns of the remanufactured motor winding according to claim 3 is characterized in that: The tightening and positioning module includes a hydraulic cylinder and a support frame, the driving motor is installed at one end of the upper surface of the base, the support frame is installed at the other end of the upper surface of the base, the hydraulic cylinder is installed on the support frame, and the output shaft of the hydraulic cylinder tightens one end of the rotating shaft.

5. The automatic measuring device for the number of turns of the remanufactured motor winding according to claim 1 is characterized in that: The data acquisition system includes a display screen, a data storage unit, a voltage sensor and a microcontroller. The voltage sensor is used to collect the back-electromotive force signal generated in the stator winding in real time. The microcontroller is used to calculate the number of turns of the stator winding according to the back-electromotive force signal. The display screen is used to display the turn calculation result obtained by the microcontroller in real time. The data storage unit is used to store and record the turn calculation result obtained by the microcontroller.

Images