CN110383405B

CN110383405B - Winding device and winding inspection method

Info

Publication number: CN110383405B
Application number: CN201880014748.3A
Authority: CN
Inventors: 中田智; 水野健; 长谷川治之
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2017-03-06
Filing date: 2018-01-29
Publication date: 2021-06-22
Anticipated expiration: 2038-01-29
Also published as: WO2018163656A1; JPWO2018163656A1; CN110383405A; JP6687293B2

Abstract

The invention relates to a winding device and a winding inspection method, comprising: a winding section (1) for winding a wire (3) around the magnetic pole teeth (11); a measuring unit (4) that measures the tension applied to a wire (3) that forms a coil (2) when the coil (2) is wound by the winding unit (1); a calculation unit (6) that calculates a determination value based on both the tension at the time of winding the coil (2) to be inspected and data of a predetermined tension; and a determination unit (7) that determines whether the coil to be inspected is good or not, based on the determination value calculated by the calculation unit (6).

Description

Winding device and winding inspection method

Technical Field

The present invention relates to a winding device and a winding inspection method for a coil used in a rotating electrical machine.

Background

As a structure of an armature of a rotating electric machine, there is a coil in which a wire material is wound around each magnetic pole tooth. Since an abnormality such as winding disorder of the coil may cause a failure of the rotating electric machine, an inspection for determining an abnormality of the winding is required. In patent document 1 described below, an image of a coil is acquired, the appearance of the coil is evaluated, and an inspection is performed.

Patent document 1: japanese patent laid-open publication No. 2005-241582

Disclosure of Invention

In the above patent document 1, since the coil is inspected by taking an image, there is a limitation in a winding method of the coil when the entire circumference of the coil is inspected by a single camera. Further, when an inspection is performed by a plurality of cameras, there are cases where a limitation is imposed on the mounting position of the camera, and the luminance of the captured image differs for each camera, so that it is difficult to set a threshold value so as to become an equivalent criterion for determination in each captured image.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a winding device and a winding method capable of detecting an abnormality for the entire circumference of a coil regardless of the winding method and the shape of a magnetic pole tooth, and capable of detecting an abnormality in a short processing time regardless of the position of the coil where the abnormality occurs.

The winding device according to the present invention includes: a winding portion for winding a wire around the magnetic pole teeth; a measuring section that measures a tension applied to the wire material when the wire material is wound around the winding section; and a determination unit that determines whether the winding state is satisfactory or not based on a result of comparing the measured tension data with the predetermined tension data.

In the winding inspection method according to the present invention, the measuring unit measures the tension applied to the wire rod when the wire rod is wound around the magnetic pole teeth by the winding unit, and determines whether the winding state is good or not based on a result of comparing data of the measured tension with data of a predetermined tension.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the winding device and the winding inspection method described above, it is possible to detect an abnormality for the entire circumference of the coil regardless of the winding method and the shape of the magnetic pole teeth, and it is possible to detect an abnormality in a short processing time regardless of where the abnormality occurs in the coil.

Drawings

Fig. 1 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 1.

Fig. 2 is a graph showing an example of data in the storage unit according to embodiment 1.

Fig. 3 is a graph showing data processing in the arithmetic unit according to embodiment 1.

Fig. 4 is a graph showing data processing in the determination unit according to embodiment 1.

Fig. 5 is a sectional view showing a state in which a wire material is wound around the magnetic pole teeth.

Fig. 6 is a sectional view showing a state in which a wire material is wound around the magnetic pole teeth.

Fig. 7 is a schematic diagram showing a state in which a coil is photographed by a camera.

Fig. 8 shows a winding state of the coil in embodiment 1.

Fig. 9 shows a winding state of the coil in embodiment 1.

Fig. 10 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 2.

Fig. 11 is a graph showing an example of data in the storage unit according to embodiment 2.

Fig. 12 is a graph showing data processing in the arithmetic unit according to embodiment 2.

Fig. 13 is a graph showing data processing in the determination unit according to embodiment 2.

Fig. 14 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 3.

Fig. 15 is a schematic view showing the orbit of the winding nozzle in embodiment 3.

Fig. 16 is a schematic view showing the orbit of the winding nozzle in embodiment 3.

Fig. 17 shows the variation of the tension in embodiment 3.

Fig. 18 shows the variation of the tension in embodiment 3.

Fig. 19 shows the amplitude of fourier transform of the tension in embodiment 3.

Fig. 20 shows the amplitude of fourier transform of the tension in embodiment 3.

Fig. 21 shows a model of the winding in embodiment 3.

Fig. 22 shows fourier transform of tension in embodiment 3.

Fig. 23 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 4.

Fig. 24 is a schematic view showing a winding device of a rotating electric machine according to embodiment 5.

Fig. 25 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 6.

Fig. 26 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 7.

Detailed Description

Embodiment mode 1

Embodiment 1 is explained below based on the drawings. Fig. 1 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 1. The winding device includes a winding unit 1, a measuring unit 4, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring section 4 measures the tension applied to the wire 3 forming the coil 2 when the coil 2 is wound by the winding section 1. In the measuring section 4, the wire 3 is sandwiched by the 3

pulleys

4A, 4B, 4C, and the tension is measured from the force received by the intermediate pulley 4B. Further, the number of pulleys may be other than 3. That is, in the measuring section 4, the wire 3 is sandwiched between the plurality of pulleys, and the tension is measured based on the force received by some or all of the plurality of pulleys. The storage unit 5 stores the tension measured by the measuring unit 4 as data. Fig. 2 shows an example of data actually stored in the storage unit 5, in which the vertical axis represents tension (N) and the horizontal axis represents time (t).

The calculation unit 6 calculates a determination value based on both the tension when the coil to be inspected stored in the storage unit 5 is wound and the data of the tension when the coil to be compared stored in advance is wound. Here, the data of the tension when the coil to be compared is wound may be measurement data acquired before and after the present measurement, or may be an average value of all the measurement data. The tension data may be obtained by winding the coil of a non-defective product. In fig. 3, the difference between the tension when the coil to be inspected was wound and the tension when the coil to be compared was wound was obtained. In fig. 3, it is clear that a large difference E is generated at a certain time. In addition to the difference thus obtained, a correlation with the tension at the time of winding the coil to be compared may be obtained.

Here, the cross-correlation computation value C is explained briefly.

When tensions when the coil to be inspected at times t1, t2, and t3 … tn is wound are x1, x2, and x3 … xn, and tensions when the coil to be compared at times t1, t2, and t3 … tn is wound are y1, y2, and y3 … yn, C ═ x1y1+ x2y2 … + xnyn)/{ (x1 83 { (x1 83 + x2y2 … + xnyn) }²+x2²+…+xn²)^1/2×(y1²+y2²+…+yn²)^1/2Calculating the correlation value C, and comparing the value C with a comparison value.

The determination unit 7 determines whether or not the coil to be inspected is good based on the determination value calculated by the calculation unit 6. That is, the determination unit 7 determines whether the winding state is good or not based on the result of comparing the measured tension data with the predetermined tension data. In fig. 4, since the difference E exceeds the reference value M, an abnormality of the coil 2 can be detected. According to the above configuration, it is possible to detect an abnormality over the entire circumference of the coil 2 regardless of the winding method and the shape of the magnetic pole teeth 11. In addition, it is possible to detect an abnormality in a short processing time regardless of the position of the coil 2 at which the abnormality occurs.

In fig. 1, the wire 3 passes through the bobbin 8, the adjusting pulley 9, the movable pulley 10, the measuring section 4, and the winding section 1 in this order, but the measuring section 4 may be attached to another position. In fig. 1, a flyer winding method is employed in which the winding nozzle 12 is rotated about the magnetic pole teeth 11, but the winding method and the shape of the magnetic pole teeth 11 are not limited to these methods and shapes. That is, the winding method may be a nozzle winding method or a spindle winding method. Further, a method of winding the magnetic pole teeth 11 around the bobbin instead of directly winding the magnetic pole teeth may be employed.

Next, a method of detecting winding disorder over the entire circumference of the coil 2 by tension will be described. Fig. 5 and 6 are sectional views showing a state in which a wire is wound around the magnetic pole teeth. Fig. 5 is a sectional view showing the wire rods arranged in order, and fig. 6 is a sectional view showing the wire rods in which winding disorder occurs. The wire 3 is wound around the magnetic pole teeth 11 via the insulator 13. As a structure of an armature of a rotating electric machine, there is a coil 2 in which a wire 3 is wound around each magnetic pole tooth 11. In the slot space of each magnetic pole tooth 11, the efficiency of the rotating electric machine increases as the ratio of the area of the conductor portion occupying the region in which the coil 2 is wound, that is, the coil space factor increases. Therefore, the winding is performed such that the upper layer wire is disposed at the center between the adjacent lower layer wires, that is, the wires 3 are alternately stacked on the cross section of the coil 2, whereby the coil space factor can be increased.

In practice, winding is performed while the tooth tip and the core back of each magnetic pole tooth 11 reciprocate, but the wire rods 3 are sometimes not stacked alternately due to variations in wire diameter during the manufacture of the wire rods 3 or variations in tension applied to the wire rods 3 during winding. A state in which the respective wire materials 3 are arranged substantially in a staggered stack in the cross section of the coil 2 is referred to as a coil having an ordered arrangement, and a state in which a deviation occurs from the staggered stack is referred to as a coil in which winding disorder occurs. If winding disturbances occur in the coil 2, the coil space factor may be reduced, or the arrangement of the coil 2 may be shifted due to vibration during operation of the rotating electrical machine, thereby deteriorating the characteristics of the rotating electrical machine. Further, since the outermost peripheral position of the coil 2 is moved to the outer peripheral side, the adjacent coils 2 are brought into contact with each other at the time of assembly, or the frame arranged in the axial direction of the coil 2 is brought into contact with the coil 2, and the wire 3 is overflowed from the groove space in which the coil 2 is wound, whereby there is a possibility that the withstand voltage of the rotating electrical machine is deteriorated. As described above, winding disorder of the coil 2 may cause a failure of the rotating electric machine, and therefore, an inspection for determining winding disorder of the coil 2 is required. In patent document 1, a picked-up image of the coil 2 is acquired, the appearance of the coil 2 is evaluated, and the coil 2 is inspected.

However, since the defect caused by the winding disorder of the coil 2 does not depend on the position of the wire 3 at which the winding disorder occurs, it is necessary to perform an inspection for determining the winding disorder over the entire circumference of the coil 2. That is, the coil 2 needs to be inspected over the entire circumference. As shown in patent document 1, in the method of inspecting the coil 2 by imaging, a plurality of cameras are required to inspect the entire circumference of the coil 2 as long as the coil 2 side is not rotated as in the case of the main shaft winding or the entire circumference of the coil 2 can be imaged from one direction as in the case of winding the coil material 3 in the barrel (in fig. 7, since the tip of the magnetic pole teeth is not present, the entire circumference of the coil 2 can be imaged from one direction of the barrel 50 by 1 camera 100).

When an inspection is performed by a plurality of cameras, the plurality of cameras must be arranged so as to sandwich the coil 2, and therefore, there is a case where a limitation is imposed on the mounting position of the cameras. Further, since the positional relationship between the light source and each camera is different, the luminance of the captured image differs for each camera, and it is difficult to set the threshold value so as to be an equivalent criterion for determination in each captured image. The present embodiment has been made to solve the above-described problems, and provides a coil inspection device and an inspection method capable of determining winding disorder around the entire circumference of the coil 2 regardless of the winding method and the shape of the magnetic pole teeth 11.

Regardless of the winding method and the shape of the magnetic pole teeth 11, tension is applied to the wire 3 so that the coil 2 does not slacken during winding. Since the outer peripheral shape of the magnetic pole teeth 11 is generally not a perfect circle but a substantially rectangular shape, the distance between the tip of the winding nozzle 12 and the position where the wire 3 is wound around the magnetic pole teeth 11 varies during winding, and the tension applied to the wire 3 also varies. In general, the outer peripheral shape of the magnetic pole tooth 11 is substantially rectangular, and the tension applied to the wire 3 at the moment when the wire 3 is wound at the corner of the substantially rectangular shape is increased, and the tension applied to the wire 3 at the time of winding at the short side is larger than that at the long side of the substantially rectangular shape.

Fig. 8 and 9 show the winding state of the coil in embodiment 1, fig. 8 is a sectional view showing the coil, and fig. 9 is a view of the coil and the magnetic pole teeth as viewed from the center side of the rotating electric machine. Unlike the tension fluctuation due to the outer peripheral shape of the magnetic pole teeth 11, the tension applied to the wire 3 fluctuates at the moment when winding disturbance occurs in the coil 2. For example, as shown in fig. 8 and 9, when the wire 3 is caught by the wound wire 3 or the like and cannot be arranged at a predetermined position, the tension applied to the wire 3 increases, and when the wire 3 falls from the arranged position (3A) to the lower layer (3B), the wire 3 is instantaneously loosened, and therefore, the tension applied to the wire 3 decreases. Therefore, a difference is generated between the tension when the acceptable coil 2 wound in an orderly manner is wound and the tension when the coil 2 in which winding disorder occurs is wound (see fig. 3), and therefore, the winding disorder of the coil 2 can be detected from the tension when the wire material 3 is wound. In addition, in the measurement based on the captured image, the data amount increases, and the processing time becomes long. In contrast, in the measurement based on the tension, since the amount of data is relatively small, the processing time is short, and the abnormality can be detected in the short processing time regardless of the position where the winding disorder of the coil 2 occurs.

Embodiment mode 2

Fig. 10 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 2. The winding device includes a winding unit 1, a measuring unit 4, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring section 4 measures the tension applied to the wire 3 when the jumper wire 21 connecting the coils 2 is wound by the winding section 1. That is, in the present embodiment, the measuring section 4 measures the tension applied to the wire material 3 while the wire material 3 is caused to straddle from 1 magnetic pole tooth 11 to another magnetic pole tooth 11. In the measuring section 4, the wire 3 is sandwiched by the 3

pulleys

4A, 4B, 4C, and the tension is measured from the force received by the intermediate pulley 4B. The storage unit 5 stores the tension measured by the measuring unit 4 as data. Fig. 11 shows an example of data actually stored in the storage unit 5, in which the vertical axis represents tension (N) and the horizontal axis represents time (t).

The calculation unit 6 calculates the determination value based on both the tension when the coil to be inspected stored in the storage unit 5 is wound and the data of the tension when the coil to be compared stored in advance is wound. Here, the data of the tension when the coil to be compared is wound may be measurement data acquired before and after the present measurement, or may be an average value of all the measurement data. The tension data may be obtained by winding the coil of a non-defective product. In fig. 12, the difference between the tension when the coil to be inspected was wound and the tension when the coil to be compared was wound was obtained. In fig. 12, it is clear that a large difference G occurs at a certain time. In addition to the difference thus obtained, a correlation with the tension at the time of winding the coil to be compared can be obtained.

The determination unit 7 determines whether or not the winding state is good (whether or not the coil to be inspected is good) based on the determination value calculated by the calculation unit 6. In fig. 13, since the difference in tension exceeds the reference value H, an abnormality of the coil 2 can be detected. According to the above configuration, the abnormality of the jumper wire 21 can be detected regardless of the winding method and the shape of the magnetic pole teeth 11.

Next, a method of detecting the floating of the jumper line 21 by the tension will be described. After the wire material 3 is wound around 1 magnetic pole tooth 11 constituting the rotating electric machine, the wire material 3 is wound around the other magnetic pole teeth 11 without being cut, and thus, the man-hours for connecting the coils 2 of the different magnetic pole teeth 11 to each other can be reduced. At this time, the jumper wire 21 connecting the coils 2 of different magnetic pole teeth 11 is guided to a predetermined position by the jumper pin 22 provided on the magnetic pole tooth 11. However, the jumper wire 21 may be caught by the unevenness of the surface of the jumper pin 22 and float. If the jumper wire 21 floats, the coil 2 is loosened to deteriorate the characteristics of the rotating electric machine, or the jumper wire 21 itself may be broken, and therefore, it is necessary to detect the float of the jumper wire 21.

When the jumper wire 21 is caught by the irregularities on the surface of the jumper pin 22, the tension applied to the wire 3 is instantaneously increased. The direction of the difference G in fig. 12 is positive, while the direction of the difference E in fig. 3 is negative, because the instantaneous tension applied to the wire 3 when the jumper wire 21 is caught by the irregularities on the surface of the jumper pin 22 is measured in embodiment 2, the direction is positive, unlike embodiment 1. By measuring the tension in this manner, it is possible to detect whether or not the jumper wire 21 is stuck to the irregularities on the surface of the jumper pin 22. In the measurement based on the captured image, the amount of data increases and the processing time increases, but in the measurement based on the tension, the amount of data is small, and therefore, the processing time becomes short, and it is possible to detect an abnormality in a short processing time regardless of where the jumper 21 floats.

Embodiment 3

Fig. 14 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 3. The winding device includes a winding unit 1, a measuring unit 4, a storage unit 5, a calculating unit 6, a detecting unit 31, and a correcting unit 32. The measuring section 4 measures the tension applied to the wire 3 forming the coil 2 when the coil 2 is wound by the winding section 1. In the measuring section 4, the wire 3 is sandwiched by the 3

pulleys

4A, 4B, 4C, and the tension is measured from the force applied to the intermediate pulley 4B. The storage unit 5 stores the tension measured by the measuring unit 4 as data. The calculation unit 6 performs a calculation based on fourier transform based on the tension stored in the storage unit 5. The detector 31 detects the positional displacement between the magnetic pole tooth 11 (coil 2) and the winding unit 1 from the value calculated by the calculator 6. The correction unit 32 corrects the position of the winding unit 1 based on the calculated value of the positional deviation detected by the detection unit 31.

According to the above configuration, the positional displacement between the magnetic pole tooth 11 and the winding portion 1 can be detected and reduced regardless of the winding method and the shape of the magnetic pole tooth 11.

Next, a method of detecting a positional displacement between the magnetic pole tooth 11 and the winding portion 1 by tension will be described. Fig. 15 and 16 are schematic views showing the trajectory of the winding nozzle in embodiment 3. Fig. 15 shows the trajectory 33A of the winding nozzle when the eccentricity is not present, and fig. 16 shows the trajectory 33B of the winding nozzle when the eccentricity is present. When the position of the magnetic pole tooth 11 is shifted when the magnetic pole tooth 11 for winding the wire material 3 is fixed, the center of the magnetic pole tooth 11 and the center of the orbit of the winding nozzle 12 for winding the wire material 3 are shifted, and this shift is referred to as eccentricity.

Fig. 17 and 18 show variations in tension in embodiment 3. Fig. 17 shows the variation of the tension when the eccentricity is not present, and fig. 18 shows the variation of the tension when the eccentricity is present. The eccentricity causes a large variation in the distance between the tip of the winding nozzle 12 and the position where the wire 3 is wound during winding, and therefore the range of variation in the tension applied to the wire 3 increases. Since the possibility of occurrence of winding disorder of the coil 2 increases if the fluctuation range of the tension increases, it is necessary to detect the fluctuation of the tension and suppress eccentricity.

As shown in fig. 15, the outer peripheral shape of the magnetic pole tooth 11 of the wound wire 3 is substantially rectangular, and the magnitude of the distance from the magnetic pole tooth 11 varies 2 times when the winding nozzle 12 winds around the magnetic pole tooth 11 for one circumference. That is, the case of moving from the long side to the short side and the case of moving from the short side to the long side are described. Therefore, as shown in fig. 17, the magnitude of the tension applied to the wire 3 during winding also varies 2 times. If there is eccentricity, a difference occurs between one and the other of the 2 times of the fluctuation of the magnitude of the distance when the winding nozzle 12 winds around the magnetic pole teeth 11 for one circumference, and therefore, as shown in fig. 18, a difference also occurs between one and the other of the 2 times of the fluctuation of the magnitude of the tension applied to the wire 3 during winding.

Fig. 19 and 20 show the fourier transform amplitude of the tension in embodiment 3. Fig. 19 shows the amplitude of fourier transform of tension when there is no eccentricity, and fig. 20 shows the amplitude of fourier transform of tension when there is eccentricity. If the tension with respect to the measurement time is fourier-transformed, an amplitude component of a frequency equal to the winding frequency, which is the number of revolutions that the winding nozzle 12 rotates around the magnetic pole tooth 11 for 1 second, appears when the tension level fluctuates 1 time around the magnetic pole tooth 11. Therefore, in the case where there is no eccentricity, the amplitude component of the same frequency as the winding frequency is 0, but in the case where there is eccentricity, the amplitude component of the same frequency as the winding frequency is not 0.

For example, the case where the rectangular magnetic pole teeth 11 are wound by the flyer nozzle is modeled and fixed. As shown in fig. 21, the tension F applied to the wire 3 is directed to 1 of the four corners of the magnetic pole teeth 11 of the wound wire 3, and the rotational motion is performed at a fixed frequency F with a component Fcos Φ toward the rotational center as a centripetal force. The centripetal force of the rotational motion at a fixed frequency, Fcos phi, is a fixed force F 'independent of time, and therefore the time variation of the tension force F is represented by the time variation of F'/cos phi.

Fig. 21 shows a model of the winding in embodiment 3. If the rotation radius is r, the length of the long side of the magnetic pole tooth 11 is 2a, the length of the short side is 2b, the eccentricity in the long side direction is c, and the eccentricity in the short side direction is d, the value of Φ varies depending on which of the four corners of the magnetic pole tooth 11 is wound, and the value of the tension F is expressed as follows.

When the 1 st quadrant angle 41 is wound, the following formula (1) is established.

Equation 1

When the 2 nd quadrant angle 42 is wound, the following equation (2) holds.

Equation 2

When the 3 rd quadrant 43 is wound, the following formula (3) is established.

Equation 3

In the 4 th quadrant 44 winding, the following equation (4) holds.

Equation 4

The fourier transform of the tension F expressed by the following equation (5) depends on the eccentricity c in the longitudinal direction and the eccentricity d in the short direction.

Equation 5

Fig. 22 shows fourier transform of tension in embodiment 3. When the rotation radius r is 33, the long side length 2a of the magnetic pole tooth 11 is 21, and the short side length 2b is 6.6, the fourier transform of the tension F is represented by a contour diagram, in which the horizontal axis is an eccentricity d in the short side direction and the vertical axis is an eccentricity c in the long side direction. Here, a component appearing at a frequency n times the frequency f of the winding is referred to as an n-th order component. The value obtained by dividing the amplitude of the 1 st order component by the amplitude of the 2 nd order component is defined as an amplitude ratio, and the value obtained by subtracting the amplitude of the 2 nd order component from the amplitude of the 1 st order component is defined as a phase difference. The amplitude ratio is in dimensionless units and the phase difference is in rad. A plurality of ellipses centered at the center of fig. 22 are contour lines of amplitude ratios, and a line radially spreading from the center of fig. 22 is a contour line of phase differences. The larger the eccentricity is, the larger the 1 st-order component of the amplitude of the fourier transform of the tension F becomes, and the 1 st-order component of the phase of the fourier transform of the tension F is clearly different depending on the direction of eccentricity.

Further, it is clarified that the eccentricity c in the longitudinal direction and the eccentricity d in the short direction are uniquely obtained from the amplitude ratio and the phase difference of the fourier transform of the tension F. Therefore, the magnitude and direction of the amplitude ratio and phase difference eccentricity from the fourier transform of the tension F are detected. By correcting the position of the winding portion 1 and reducing the eccentricity, the positional deviation of the coil 2 and the winding portion 1 can be reduced.

The flow is shown below. The contour map shown in fig. 22 is stored in advance as a data table. The computing unit 6 measures the tension F and performs fourier transform to obtain an amplitude ratio and a phase difference. The detection unit 31 compares the obtained amplitude ratio and phase difference with the data table, and obtains the eccentricity c in the longitudinal direction and the eccentricity d in the short direction, which have the closest values. Based on the calculated long-side direction eccentricity c and short-side direction eccentricity d, a command is issued to the correcting unit 32 having a linear motion XY table, for example, in its configuration, to drive the winding unit 1, thereby reducing the positional deviation between the magnetic pole teeth 11 and the winding unit 1.

The method of correcting the positional deviation according to the present embodiment can be performed simultaneously with the coil inspection described in

embodiments

1 and 2.

Embodiment 4

Fig. 23 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 4. The winding device includes a winding unit 1, a measuring unit 40, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring section 40 measures the tension applied to the wire 3 when the coil 2 is wound by the winding section 1. Here, as the measuring unit 40, there is a laser displacement meter that measures the position of the movable sheave 10. The storage unit 5 stores the tension data measured by the measuring unit 40. The calculation unit 6 calculates a determination value based on both the tension when the coil to be inspected stored in the storage unit 5 is wound and the data of the tension when the coil to be compared stored in advance is wound. The determination unit 7 determines whether or not the coil to be inspected is good based on the determination value calculated by the calculation unit 6.

In the present embodiment, the measuring unit 40 measures the tension by detecting the position of the movable sheave 10 through which the wire 3 passes. That is, the movable sheave 10 is attached to the fixing portion 48 via the rod 49, and if the tension changes, the degree of bending of the rod 49 changes, so that the position of the movable sheave 10 changes, and the position of the movable sheave 10 is detected using a laser displacement meter or the like, and the tension is measured. According to the above configuration, the device for inspecting the coil 2 can be added after the existing winding device so as not to change the coil 2. The data stored in the storage unit 5, the calculation method by the calculation unit 6, and the determination method by the determination unit 7 are the same as those in embodiment 1.

A method of adding a device for inspecting the coil 2 will be described later. In the case where a device for inspecting the coil 2 is added after the existing winding device, as a method for measuring the tension applied to the wire 3, as described in embodiment 1, there is a method for measuring the tension from the force applied to the intermediate pulley by sandwiching the wire 3 between 3 pulleys. In this method, since the pulley is newly added, the tension applied to the wire 3 is increased as compared with before the pulley is added. In order to prevent the coil 2 from being changed in a satisfactory manner even if the device is added, the device needs to be readjusted so as to have the same tension as that before the addition, but it is difficult to apply no change at all.

As the structure of the winding device, there are an adjusting pulley 9 that adjusts the tension of the wire 3 and a movable pulley 10 that suppresses the slack of the wire 3. Although the tension applied to the wire 3 varies, the slack can be suppressed by the operation of the movable sheave 10, and therefore the wire 3 can be stably supplied to the winding portion 1. At this time, since the position of the movable sheave 10 and the tension applied to the wire 3 are correlated as described above, the position of the movable sheave 10 is measured by the measuring unit 40, i.e., a laser displacement meter or the like, whereby the tension applied to the wire 3 can be measured. In the present embodiment, the measurement unit is of a non-contact type, and therefore, a device for inspecting the coil 2 can be added after an existing winding device so as not to change the coil 2 in a satisfactory manner.

The tension measuring method according to the present embodiment may be used for measuring the tension applied to the wire rod when the jumper wire according to embodiment 2 is wound. The structure of embodiment 3 may be added to the structure of this embodiment.

Embodiment 5

Fig. 24 is a schematic view showing a winding device of a rotating electric machine according to embodiment 5. The winding device includes a winding unit 1, a measuring unit 51, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring section 51 measures the tension applied to the wire 3 when the coil 2 is wound by the winding section 1. The storage unit 5 stores the tension data measured by the measuring unit 51. The calculation unit 6 calculates a determination value based on both the tension when the coil to be inspected stored in the storage unit 5 is wound and the data of the tension when the coil to be compared stored in advance is wound. The determination unit 7 determines whether or not the coil to be inspected is good based on the determination value calculated by the calculation unit 6. The measuring unit 51 measures the tension by detecting the torque at the time of operation of the motor constituting the winding unit 1. With this configuration, it is possible to add a device for inspecting the coil 2 after an existing winding device so as not to change the quality of the coil 2.

For example, when winding is performed using a flyer nozzle, as shown in fig. 21 of embodiment 3, the tension F applied to the wire 3 is directed toward 1 of the four corners of the magnetic pole teeth 11 around which the wire 3 is wound. The component Fcos Φ toward the rotation center is a centripetal force of the rotational motion, and the remaining component Fsin Φ is a load torque received by, for example, a servo motor constituting the winding unit 1 in a direction opposite to the rotational direction. Therefore, the load torque applied to the servo motor can be calculated from the current for driving the servo motor, and therefore Fsin Φ can be measured by detecting the current for driving the servo motor by, for example, a servo amplifier constituting the measuring unit 51. Since the abnormality occurs in Fsin Φ if the tension F is abnormal, the abnormality in tension can be detected by the above method. The data stored in the storage unit 5, the calculation method by the calculation unit 6, and the determination method by the determination unit 7 are the same as those in embodiment 1.

Embodiment 6

Fig. 25 is a schematic diagram illustrating a winding device of a rotating electric machine according to embodiment 6. The winding device includes a winding unit 1, a measuring unit 70, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring unit 70 measures the tension applied to the wire 3 when the coil 2 is wound by the winding unit 1. Here, as the measuring section 70, there is a piezoelectric element or the like provided in the magnetic pole teeth 11, and it is considered that the tension is measured by converting the force applied to the magnetic pole teeth 11 when the wire material 3 is wound into a voltage. In this way, the measurement unit 70 performs measurement by detecting a reaction of the tension applied to the coil 2.

In fig. 25, the measuring unit 70 measures the tension applied to the wire 3 when the coil 2 is wound by the winding unit 1. The storage unit 5 stores the tension data measured by the measuring unit 70. The calculation unit 6 calculates a determination value based on both the tension when the coil to be inspected stored in the storage unit 5 is wound and the data of the tension when the coil to be compared stored in advance is wound. The determination unit 7 determines whether or not the coil to be inspected is good based on the determination value calculated by the calculation unit 6. The measuring unit 70 is characterized by measuring by the reaction of the tension applied to the detection coil 2. With this configuration, it is possible to add a device for inspecting the coil 2 after an existing device for winding so as not to change the coil 2. The data stored in the storage unit 5, the calculation method by the calculation unit 6, and the determination method by the determination unit 7 are the same as those in embodiment 1.

Embodiment 7

Fig. 26 is a schematic diagram showing a winding device of a rotating electric machine according to embodiment 7. The winding device includes a winding unit 1, a measuring unit 80, a storage unit 5, a calculating unit 6, and a determining unit 7. The measuring unit 80 measures the tension applied to the wire 3 when the coil 2 is wound by the winding unit 1. Here, as the measuring section 80, there is a motor connected to a pulley through which the wire material 3 passes, and it is considered that the tension is measured by detecting the force applied to the magnetic pole teeth 11 when the wire material 3 is wound by the rotational torque applied to the pulley. In this way, the measurement unit 80 detects the counter electromotive force of the motor connected to the pulley to perform measurement.

In fig. 26, the measuring unit 80 measures the tension applied to the wire 3 when the coil 2 is wound by the winding unit 1. The storage unit 5 stores tension data measured by the measuring unit 80. The calculation unit 6 calculates a determination value based on both the tension at the time of winding the coil 2 to be inspected, which is stored in the storage unit 5, and the data of the tension at the time of winding the coil 2 to be compared, which is stored in advance. The determination unit 7 determines whether or not the coil to be inspected is good based on the determination value calculated by the calculation unit 6. Then, the measuring unit 80 is characterized by detecting the back electromotive force of the motor connected to the pulley to perform measurement. With this configuration, it is possible to add a device for inspecting the coil 2 after an existing device for winding so as not to change the coil 2. The data stored in the storage unit 5, the calculation method by the calculation unit 6, and the determination method by the determination unit 7 are the same as those in embodiment 1.

In addition, the present invention can freely combine the respective embodiments within the scope of the invention, or appropriately modify or omit the respective embodiments.

Description of the reference numerals

The device comprises a winding part 1, a wire 3, a measuring

part

4, 40, 51, 70 and 80, a

pulley

4A, 4B and 4C, a determining part 7, a movable pulley 10, a magnetic pole tooth 11, a jumper wire 21, a detection part 31 and a correction part 32.

Claims

1. A winding device is provided with:

a winding portion for winding a wire around the magnetic pole teeth;

a measuring section that measures a tension applied to the wire material when the wire material is wound around the winding section; and

and a determination unit that determines whether the winding state is satisfactory or not based on a result of comparing amplitude data of a frequency having the same value as the number of windings per unit time of the winding unit obtained by performing fourier transform on the measured tension with amplitude data of a frequency having the same value as the number of windings per unit time of the winding unit obtained by performing fourier transform on a predetermined tension.

2. The winding device according to claim 1,

the measuring unit clamps the wire material by a plurality of pulleys, and measures tension based on a force received by some or all of the plurality of pulleys.

3. The winding device according to claim 1,

the measuring section measures tension by detecting the position of a movable sheave through which the wire passes.

4. The winding device according to claim 1,

the measuring unit measures tension by detecting torque when a motor constituting the winding unit operates.

5. The winding device according to claim 1,

the measuring unit measures the tension by measuring the force received by the magnetic pole teeth when the wire material is wound.

6. The winding device according to claim 1,

the measuring unit measures the tension by detecting a counter electromotive force of a motor connected to a pulley through which the wire passes.

7. The winding device according to any one of claims 1 to 6, comprising:

a detection unit that detects a positional shift between the magnetic pole teeth and the winding unit based on an amplitude ratio and a phase difference obtained by fourier transform of the measured tension; and

and a correction unit that corrects the position of the winding unit based on a result detected by the detection unit.

8. A method for inspecting a winding, wherein,

the winding unit winds a wire around the magnetic pole teeth, the measuring unit measures tension applied to the wire when the wire is wound, and the determination unit determines whether the winding state is good or not based on a result of comparing amplitude data of a frequency having the same value as the number of windings of the winding unit per unit time obtained by performing Fourier transform on the tension measured by the measuring unit with amplitude data of a frequency having the same value as the number of windings of the winding unit per unit time obtained by performing Fourier transform on a predetermined tension.