JP2024044240A - Stator, rotating electric machine, and stator winding method - Google Patents

Abstract

[Problem] To provide a stator, a rotating electric machine, and a winding method that can suppress costs and form a coil with a high space factor. [Solution] An outer flange 1OUT of an insulator 1 has inlet 1A for introducing and outlet 1B for leading out electric wires 60 forming a coil 5 at different circumferential positions from the axial upper surface to the upper surface of a tooth end surface covering portion 1T, and the coil 5 has a first electric wire to an Nth electric wire (N is an integer of 2 or more) as electric wires 60, and all of the first electric wire to the Nth electric wire are introduced from inlet 1A and led out from outlet 1B and wound, forming a parallel winding in which the first electric wire to the Nth electric wire are connected in parallel on the outside of a stator core 3, and the first electric wire to the Nth electric wire are wound in order from the inside of the outer periphery of the insulator 1 to the outside of the outer periphery. [Selected Figure] Fig. 11

Description

This application relates to a stator, a rotating electric machine, and a stator winding method.

In recent years, motor technology has developed, and the demand for high-output, high-rotation-speed motors is increasing. When using a constant-voltage power source, a large driving force can be obtained by passing a large current. To pass a large current, the cross-sectional area of the wire that makes up the coil must be large. However, when the frequency becomes high, the skin effect causes the current to flow only on the surface of the wire. Therefore, the above problem can be solved by dividing the thick wire and forming a parallel winding using multiple thin wires. Even if this is done, if the diameter of the wire is large, it becomes difficult to wind the wire or insert the coil into the stator core.

Moreover, since a para-winding is formed using a plurality of thin electric wires, a plurality of bobbins corresponding to a plurality of electric wires are arranged, and a plurality of electric wires are provided at the same time. Therefore, in the conventional parallel winding technique, it is difficult to use a large number of electric wires, and in many cases, the number of electric wires in the parallel winding is three or less (see, for example, Patent Document 1).

Patent No. 5321983

Conventional winding methods for stators, rotating electric machines, and stators use winding devices that wind multiple wires in parallel windings, so the winding positions of the wires are moved. Otherwise, interference may occur. As a result, there was a problem in that the gap between the wires became large and the space factor of the coil decreased. Furthermore, when a plurality of electric wires are wound in parallel at the same time, there is a problem in that the lead-in wire and the upper layer electric wire interfere, the wound electric wire swells, and the space factor of the coil decreases. Furthermore, since a plurality of bobbins are arranged, it is necessary to secure a large layout for storing the bobbins in the process, which poses a problem of increased costs. Furthermore, when replacing the bobbins, it is necessary to replace a plurality of bobbins at the same time, resulting in longer line stop times and increased costs.

This application discloses technology to solve the problems described above, and aims to provide a stator, a rotating electric machine, and a stator winding method that can reduce costs and form coils with a high space factor.

The stator disclosed in this application is
A stator in which a plurality of coil wrapping bodies each having a coil formed on a stator core via an insulator for electrically insulating the stator core are arranged annularly in the circumferential direction,
The insulator includes a tooth end covering portion that covers an axial end of the tooth portion of the stator core;
an outer flange that is connected to the radially outer end of the tooth end covering part, covers the axial end of the yoke part of the stator core, and rises upward in the axial direction;
The outer flange includes an inlet for introducing the electric wire forming the coil and an outlet for leading out the electric wire at different positions in the circumferential direction from the upper surface in the axial direction to the upper surface of the tooth end surface covering part,
The coil has a first electric wire to an Nth electric wire (N is an integer of 2 or more) as the electric wires, and all of the first electric wire to the Nth electric wire are introduced from the introduction port and are connected to the conductor. A para-winding wire led out from the outlet and wound, in which the first electric wire to the Nth electric wire are connected in parallel on the outside of the stator core,
The first to second electric wires are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery.
Furthermore, the rotating electrical machine disclosed in this application is
The stator described above,
The rotor is rotatably disposed opposite the stator with a gap therebetween.
Furthermore, the stator winding method disclosed in this application includes:
The stator winding method described above,
One electric wire is introduced from the inlet of the insulator and wound, and then led out from the outlet of the insulator to the outside of the stator core. The process of fixing the electric wire to the fixing part installed in the electric wire is repeated N times using one continuous electric wire.

According to the stator, rotating electric machine, and stator winding method disclosed in the present application,
This reduces costs and enables the production of coils with a high space factor.

2 is a perspective view showing a configuration of a coil winding body of a stator according to the first embodiment; FIG. 2 is an exploded perspective view showing the configuration of the coil winding body of the stator shown in FIG. 1 before the coils are formed. FIG. 2 is a perspective view showing the configuration of a rotating electric machine including a stator using the coil winding body shown in FIG. 1 . FIG. 2 is a perspective view showing the configuration of one first insulator in the axial direction of the coil-wound body of the stator shown in FIG. 1; 2 is a perspective view showing a configuration of a second insulator on the other side in the axial direction of the coil winding body of the stator shown in FIG. 1 . FIG. 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; FIG. FIG. 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; FIG. 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; FIG. FIG. 2 is a plan view showing a method of winding the coil winding body of the stator shown in FIG. 1; 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; FIG. FIG. 2 is a perspective view showing a method of winding the coil winding body of the stator shown in FIG. 1; FIG. 2 is a diagram showing the configuration of a winding device used in the method of winding the coil winding body of the stator shown in FIG. 1; 2 is a flowchart illustrating a method for winding the coil winding body of the stator shown in FIG. 1 .

DESCRIPTION OF THE PREFERRED EMBODIMENTS A stator, a rotating electric machine, and a stator winding method according to embodiments will be described below with reference to the drawings. In this specification, unless otherwise specified, "axial direction," "circumferential direction," and "radial direction" refer to the "axial direction," "circumferential direction," and "radial direction" of the stator, respectively. . Also, unless otherwise specified, when referring to "upper" or "lower", we assume a plane perpendicular to the axial direction at a reference location, and "lower" refers to the side that includes the center point of the stator with that plane as the boundary. , the opposite is called "upper".

Embodiment 1.
Fig. 1 is a perspective view showing the configuration of a coil winding body of a stator according to embodiment 1. Fig. 2 is an exploded perspective view showing the configuration of the coil winding body shown in Fig. 1 before the coil is formed. Fig. 3 is a perspective view showing the configuration of a rotating electric machine formed by a stator using the coil winding body shown in Fig. 1. Fig. 4 is a perspective view showing the configuration of one first insulator in the axial direction of the coil winding body shown in Fig. 1.

Figure 5 is a perspective view showing the configuration of the other second insulator in the axial direction of the coil winding body shown in Figure 1. Figures 6 to 10, 12 and 13 are perspective views showing a winding method for the stator coil winding body shown in Figure 1. Figure 11 is a plan view showing a winding method for the stator coil winding body shown in Figure 1. Figure 14 is a diagram showing the configuration of a winding device used in the winding method for the stator coil winding body shown in Figure 1. Figure 15 is a flowchart explaining the winding method for the coil winding body shown in Figure 1.

As shown in FIG. 3, the rotating electrical machine 100 includes a stator 10 and a rotor 11 that is rotatably disposed opposite to the inner circumferential side of the stator 10 with a gap in between. The stator 10 is formed by a plurality of coil winding bodies 4 arranged in a ring shape in the circumferential direction.

The coil winding body 4 forming the stator 10 includes a first insulator 1, a second insulator 2, a stator core 3, and a coil 5, as shown in FIG. The stator core 3 is formed by laminating a plurality of magnetic plates in the axial direction. The first insulator 1 and the second insulator 2 electrically insulate the stator core 3 and the coil 5. The coil 5 is formed by winding an electric wire 60 (see FIG. 6). Details of the configuration of the coil 5 will be described later.

As shown in FIG. 2, the stator core 3 has a yoke portion 3A extending in the circumferential direction, teeth portions 3B protruding radially inward from the yoke portion 3A, and shoe portions 3C protruding on both sides in the circumferential direction from the radially inner tips of the teeth portions 3B. The area surrounded by the yoke portion 3A, teeth portions 3B, and shoe portions 3C is the slot portion 3S for installing the coil 5.

As shown in FIG. 4, the first insulator 1 has a tooth end covering portion 1T, an outer flange 1OUT, an inner flange 1IN, a slot covering portion 1S, and a chamfered portion 1F. As shown in FIG. 5, the second insulator 2 has a tooth end covering portion 2T, an outer flange 2OUT, an inner flange 2IN, a slot covering portion 2S, and a chamfered portion 2F.

As shown in FIGS. 4 and 5, the tooth end covering parts 1T and 2T are parts that cover the ends of the tooth part 3B in the axial direction. Chamfered portions 1F and 2F having circular arc cross sections in the circumferential direction are provided at circumferential corners of the tooth end covering portions 1T and 2T. When forming the coil 5 by winding in parallel using the electric wire 60 (see FIG. 6), the electric wire 60 can be smoothly wound around the chamfered portions 1F and 2F. However, the curvature of the chamfered portions 1F and 2F is not necessarily fixed, and may be set depending on the diameter W3 of the electric wire 60 used.

The outer flanges 1OUT and 2OUT are connected to the radially outer ends of the tooth end covering parts 1T and 2T, cover the axial end of the yoke part 3A, and rise axially upward or downward. The inner flanges 1IN and 2IN are connected to the radially inner ends of the tooth end covering parts 1T and 2T, cover the axial end of the radially inner end of the tooth part 3B and the axial end of the shoe part 3C, and rise axially upward or downward.

The slot covering parts 1S and 2S cover the radially inner surface of the yoke part 3A of the stator core 3, the circumferential side surface of the teeth part 3B, and the radially outer surface of the shoe part 3C. The axial length of the slot covering parts 1S and 2S is set to 1/2 the axial length of the stator core 3 in order to cover the entire side surface of the slot part 3S around which the coil 5 is wound. The thickness of the slot covering parts 1S and 2S (corresponding to the distance between the stator core 3 and the coil 5) is set appropriately depending on the applied voltage value, but here an example is shown in which it is set to 0.5 mm. However, the thickness of the slot covering parts 1S and 2S is not necessarily 0.5 mm, and the minimum thickness required may be taken depending on the voltage value and the insulating material.

Next, the configuration essential to the first insulator 1 among the first insulator 1 and the second insulator 2 will be described. As shown in FIG. 4, the outer flange 1OUT is formed with an inlet 1A and an outlet 1B at different locations in the circumferential direction, which penetrate in the radial direction and are open from the upper surface in the axial direction to the tooth end covering part 1T. . Further, in order to smoothly connect the lower portions of the inlet 1A and the outlet 1B to the slot covering portion 1S, it is chamfered along the chamfered portion 1F of the tooth end covering portion 1T.

The circumferential widths W1 and W2 of the inlet 1A and the outlet 1B are larger than the diameter W3 of one of the electric wires 60 (see FIG. 6). Thereby, the electric wire 60 can be easily introduced and led out from the inlet 1A and the outlet 1B. Note that the width W1 of the inlet port 1A and the width W2 of the outlet port 1B do not necessarily have to be the same length as long as the conditions shown above are met. Further, although an example has been shown in which the inlet 1A and the outlet 1B are arranged symmetrically in the circumferential direction in the outer flange 1OUT, the present invention is not limited to this.

The second insulator 2 does not necessarily require the same inlet port 1A and outlet port 1B as the first insulator 1. However, from the viewpoint of productivity, the first insulator 1 and the second insulator 2 are formed in substantially the same shape as shown in FIGS. 4 and 5, and the second insulator 2 also has the same shape as the first insulator 1. An example is shown in which an inlet 2A and an outlet 2B are formed.

The coil 5 has electric wires 60 from the first electric wire to the Nth electric wire (N is an integer of 2 or more). All of the electric wires 60 from the first electric wire to the Nth electric wire are wound by being introduced through the inlet 1A of the first insulator 1 and being led out through the outlet 1B. Then, on the outside of the stator core 3, the electric wires 60 from the first electric wire to the Nth electric wire are connected in parallel to form a parallel winding. The electric wires 60 from the first electric wire to the Nth electric wire are wound in order from the inside of the outer periphery of the first insulator 1 and the second insulator 2 to the outside of the outer periphery. Further details of the configuration of the coil 5 will be described in the winding method of the coil winding body 4 of the stator 10.

Next, the winding method for the stator of the rotating electric machine of the first embodiment configured as described above, particularly the winding method for the coil winding body, will be explained based on the winding device in Figures 6 to 13 and 14, and the flow chart in Figure 15. Here, an example of the manufacturing method for one coil winding body 4 is shown. However, when performing parallel winding, it is not necessarily the case that only one coil winding body 4 is manufactured at the same time.

First, the winding device 6 used here will be described with reference to FIG. 14. The winding device 6 winds the electric wire 60 stored in the bobbin 6A around the stator core 3 via the first and second insulators 1 and 2 to form the coil 5. The winding device 6 includes at least a tension applying section 6C, a winding section 6D, a core fixing section 6F, a lead-in wire fixing section 6G, and a hook 3F as a fixing section.

The tension applying section 6C applies necessary tension (pressure) to the electric wire 60. However, the method of applying tension to the electric wire 60 is not particularly limited. A nozzle 6E through which the electric wire 60 passes is provided at the tip of the winding portion 6D. The winding portion 6D can freely move in the illustrated X direction, Y direction, and Z direction, and can adjust the radial position of the electric wire 60 within the slot portion 3S (see FIG. 2) during winding.

This allows the winding unit 6D to freely rotate the nozzle 6E on the YZ plane. The winding unit 6D then uses the nozzle 6E to wind the electric wire 60, to which tension has been applied by the tension application unit 6C, around a predetermined location on the stator core 3 via the first and second insulators 1 and 2. The nozzle 6E is formed of a rod-shaped jig with a hole in the center through which the electric wire 60 passes, and serves to adjust the winding position of the electric wire 60 during winding. It is desirable to adjust the rotation measurement of the winding unit 6D as necessary.

The core fixing part 6F fixes the stator core 3 on which the first and second insulators 1 and 2 are installed. Note that illustration of the fixing method is omitted. The lead-in wire fixing part 6G is installed outside the core fixing part 6F and fixes the starting part of the winding of the electric wire 60, but illustration of the fixing method is omitted. The hook 3F is installed outside the core fixing part 6F, and hooks and fixes the electric wire 60 in the middle of winding.

As shown in FIG. 9, the hook 3F includes a bar-shaped convex portion 3F1 extending in the axial direction, and extends outward in the circumferential direction on the upper surface of the convex portion 3F1, hooks the electric wire 60, and serves as a guide to prevent the electric wire 60 from slipping. It has a convex portion 3F2. The convex portion 3F2 can prevent the electric wire 60 hooked onto the convex portion 3F1 of the hook 3F from sliding out in the axial direction. In order to avoid damaging the electric wire 60, it is desirable to chamfer the inside of the convex portion 3F1 to form an arcuate surface.

Further, the height position H1 of the upper surface of the convex portion 3F2 in the axial direction is a position closer to the center in the axial direction than the height position H2 of the upper surface of the first insulator 1, that is, the position H1 is lower than the position H2 in the drawing of FIG. It is desirable to install it in the position of In this way, the axial upper surface height position H1 of the convex portion 3F2 is formed at a lower position in the axial direction than the upper surface height position H2 of the first insulator 1 in the axial direction (in FIG. 9). , the electric wire 60 hooked on the hook 3F can be prevented from slipping out from the inlet 1A or the outlet 1B. Note that the fixing part does not necessarily use the hook 3F, and may be any fixing part that can fix the electric wire 60 on the outside of the first insulator 1.

The winding device 6 is used to perform the following winding method for forming the coil winding body 4. First, a bobbin 6A containing one electric wire 60 is set in the winding device 6. Next, the electric wire 60 is prepared by passing it through each part. Next, the stator core 3 on which the first insulator 1 and the second insulator 2 are installed is fixed to the core fixing part 6F. Next, a lead-in wire fixing process is performed in which the first part of the electric wire 60 is fixed to the lead-in wire fixing part 6G (step K001 in FIG. 15). Note that the position of the lead-in wire fixing part 6G and the fixing method of the electric wire 60 are not necessarily limited. The position of the lead-in wire fixing part 6G and the fixing method are determined as necessary.

Next, an introduction process is performed in which the electric wire 60 is introduced from the introduction port 1A of the first insulator 1 (step K002 in Figs. 6 and 15). Here, the electric wire 60 is introduced into the stator core 3 for the first time, so this corresponds to the electric wire 60 of the first electric wire. Next, a winding process is performed in which the winding section 6D is rotated and the electric wire 60 is wound a predetermined number of times around the stator core 3 on which the first insulator 1 and the second insulator 2 are installed, here the winding process of the electric wire 60 of the first electric wire (step K003 in Figs. 7 and 15).

Specifically, the electric wire 60 is inserted into the introduction port 1A from the outside in the radial direction, and is bent in the circumferential direction along the wall of the introduction port 1A. The electric wire 60 is bent along the inner wall of the outer collar 1OUT to the slot covering portion 1S. After the electric wire 60 is introduced from the introduction port 2A in this manner, it is wound around the slot portion 3S.

In this case, the number of winding turns of the electric wire 60 of the first electric wire is the number of winding turns determined in the design of the rotating electric machine 100. In addition, when winding, it is desirable that the electric wire 60 is uniformly distributed within the inner diameter width of the slot portion 3S. In addition, it is desirable to arrange the electric wire 60 so that, at the end of winding the predetermined number of winding turns, it approaches the inner wall of the outer flange 1OUT of the first insulator 1.

More specifically, as shown in FIG. 11, the first layer of electric wire 60 of the first electric wire is wound in the direction of arrow J1. Since it is wound in this manner, the radial width W4 of the tooth end covering portion 1T is determined from the number of winding turns. In the illustrated example, the number of winding turns of the first electric wire is 15 turns, and the first layer has eight turns, so the width W4 is formed to be eight times the diameter W3 of the electric wire 60. The electric wire 60 of the first electric wire is introduced from the introduction port 1A, and is wound radially inward in eight turns in the direction of arrow J1, thereby forming a first layer coil of the first electric wire. Next, it is wound radially outward in seven turns in the direction of arrow J2, forming a second layer coil of the first electric wire. Then, the number of winding turns of the electric wire 60 of the first electric wire is completed by winding a total of 15 turns.

Next, when the number of winding turns of the electric wire 60 of the first electric wire is completed, a derivation step is performed in which the electric wire 60 is led out from inside the slot portion 3S to outside of the outer flange 1OUT along the derivation port 1B of the first insulator 1. (Step K004 in FIGS. 8 and 15). Next, the winding part 6D moves in the positive direction of the X direction while holding the led-out electric wire 60 in the nozzle 6E, and moves to a position beyond the hook 3F (in FIG. 14, a position on the right side of the drawing from the hook 3F). do. Then, a hook winding step is performed in which the hook 3F is rotated and the electric wire 60 is wound and fixed around the convex portion 3F1 of the hook 3F (step K005 in FIGS. 9 and 15).

Next, an introduction process is performed in which the single electric wire 60 wound around the hook 3F is introduced again from the introduction port 2A of the first insulator 1 (step K002 in FIG. 15). Therefore, the electric wire 60 inserted here corresponds to the second electric wire. Next, as in the case of the first electric wire shown above, the winding part 6D is rotated and the electric wire 60 is wrapped around the stator core 3 where the first insulator 1 and the second insulator 2 are installed a predetermined number of times. A winding step, here a winding step of the electric wire 60 of the second electric wire, is performed (step K003 in FIG. 15).

At this time, the number of turns of winding of the electric wire 60 of the second electric wire is the number of turns of winding of the electric wire 60 of the first electric wire, which is determined in the design of the rotating electric machine 100, similarly to the number of turns of winding of the electric wire 60 of the first electric wire. Further, when winding, it is desirable that the electric wire 60 is uniformly distributed within the width of the slot portion 3S in the inner diameter direction. Further, when the predetermined number of winding turns is completed, it is desirable that the electric wire 60 be arranged so as to approach the inner wall of the outer collar 1OUT of the first insulator 1.

More specifically, as shown in FIG. 11, after a total of 15 turns of the first and second layers of the first electric wire, the first and second layers are A second electric wire is wound and formed on the outside of the outer periphery of the two insulators 1 and 2. As in the case of the first electric wire 60, in the example shown in FIG. 11, the second electric wire 60 is introduced from the introduction port 1A, and is wound inward in the radial direction as indicated by the arrow J3. The first layer of the electric wire 60 of the second electric wire is formed by winding eight turns in the direction. Next, it is wound radially outward in seven turns in the direction of arrow J4, forming a second layer coil of the second electric wire 60. Then, the number of winding turns of the electric wire 60 of the second electric wire is completed by winding a total of 15 turns.

Next, when the number of winding turns of the electric wire 60 of the second electric wire is completed, the electric wire 60 is inserted into the slot portion 3S along the outlet 1B of the first insulator 1, similarly to the case of the electric wire 60 of the first electric wire. A derivation process is performed to derive the outside of the outer tsuba 1OUT from the outside (step K004 in FIG. 15). Next, the winding part 6D moves in the positive direction of the X direction while holding the led-out electric wire 60 in the nozzle 6E, and moves to a position beyond the hook 3F (in FIG. 14, a position on the right side of the drawing from the hook 3F). do. Then, a hook winding step is performed in which the hook 3F is rotated and the electric wire 60 is fixed so as to be wound around the convex portion 3F1 of the hook 3F (step K005 in FIGS. 10 and 15).

Such steps from step K002 to step K005 are repeated N times. In addition, in FIG. 11, the configuration of the electric wires 60 of the first electric wire and the second electric wire is shown, but up to N times, that is, the electric wires 60 of the first electric wire to the Nth electric wire are connected in the same order as the first electric wire and the second electric wire. The second insulators 1 and 2 are formed by being wound from the inside of the outer periphery to the outside of the outer periphery. Further, N times means 2 or more times, and in the case of 2 times, it is possible that the process ends in the state shown in FIG. 11.

Next, after repeating the above steps up to N times, the hook 3F fixing the electric wire 60 is removed (FIG. 12). In addition, in FIG. 12 and FIG. 13, an example is shown in which the process is performed five times (N times), that is, the electric wires 60 from the first electric wire to the fifth electric wire are formed. In this way, when the repetition is completed N times, a plurality of electric wires 60 are connected in advance to the entire axial end surface of the stator core 3 and the side surface of the slot portion 3S via the first and second insulators 1 and 2. A coil 5 is formed by being wound a predetermined number of times and turns. Then, the wire bundle 5A formed by the led-out wires 60 is present on the outside of the outer collar 1OUT of the first insulator 1 in the radial direction.

Then, a wire bundle cutting process is performed in which the led-out wire bundle 5A is cut at the middle position into an inlet side 5AIN and an outlet side 5AOUT (step K006 in FIG. 13 and FIG. 15). When cut in this way, one wire 60 is divided to form the first to Nth wires. Note that the position where the wire bundle 5A is cut does not necessarily have to be the middle, and the cutting position of the wire bundle 5A can be determined according to the needs when assembling the rotating electric machine 100. Next, all the wire coatings at the tip ends of the first to Nth wires on the inlet side 5AIN and the tip ends of the first to Nth wires on the outlet side 5AOUT are peeled off.

Next, after peeling off the coating, the peeled portions of the coating on the inlet side 5AIN are joined together to form an introduction wire. Further, the peeled portions of the coating on the outlet side 5AOUT are joined together to form a lead-out line. In this way, a para winding is formed. Further, the lead-in wire and the lead-out wire are connected as necessary. Then, the coil wrapping 4 (FIG. 1) is formed. A stator 10 is formed by arranging a plurality of coil wrapping bodies 4 formed in this manner in the circumferential direction. Then, a rotating electric machine 100 (FIG. 3) is manufactured by installing a rotor 11 that is rotatably arranged to face the stator 10 with a gap in between.

According to the stator of the first embodiment configured as described above,
A stator in which a plurality of coil windings, each having a coil formed on a stator core via an electrically insulating insulator, are arranged in a circular manner in the circumferential direction,
The insulator includes a tooth end covering portion that covers an axial end portion of the tooth portion of the stator core,
an outer flange connected to a radially outer end of the tooth end covering portion, covering an axial end of the yoke portion of the stator core, and rising axially upward;
the outer flange includes an inlet for introducing an electric wire forming the coil and an outlet for leading out the electric wire at different circumferential positions from an axial upper surface to an upper surface of the tooth end surface covering portion,
The coil includes a first electric wire to an Nth electric wire (N is an integer of 2 or more) as the electric wires, and all of the first electric wire to the Nth electric wire are introduced through the inlet and led out through the outlet and wound, and the first electric wire to the Nth electric wire are connected in parallel outside the stator core to form a para-winding,
The first electric wire and the second electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery of the insulator.
Moreover, according to the rotating electric machine of the first embodiment configured as described above,
The stator described above;
and a rotor rotatably disposed opposite the stator via a gap.
This reduces costs and enables the formation of coils with a high space factor.

Furthermore, according to the stator of the first embodiment configured as described above,
If N is an integer of 3 or more,
Since the first electric wire to the Nth electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery,
Furthermore, a coil with a high space factor can be formed.

Furthermore, according to the stator of the first embodiment configured as described above,
The circumferential width of the inlet and the outlet is longer than the diameter of the electric wire.
It is possible to easily introduce and lead out electric wires to and from the inlet and outlet.

Also, according to the stator winding method performed as described above,
One electric wire is introduced from the inlet of the insulator and wound, and then led out from the outlet of the insulator to the outside of the stator core. Since the process of fixing to the fixing part installed in the wire is repeated N times with one continuous electric wire,
When manufacturing one coil winding body, it is possible to use only one bobbin to store the electric wire, and winding can be performed using one electric wire, so the winding position of the electric wire is not fixed. It is possible to prevent the electric wires from moving unintentionally and causing interference with each other, and it becomes possible to wind the electric wires in an aligned manner, improving the space factor of the coil.
Furthermore, since this can be done by arranging only one bobbin, there is no need to secure a large amount of storage space for bobbins within the process, the layout can be simplified, and costs can be suppressed.
Further, when replacing the bobbin, it is possible to replace only one bobbin, so the line stop time is shortened and costs are suppressed.

Furthermore, according to the stator winding method of the first embodiment carried out as described above,
After the N repetitions,
cutting the wire bundle of the electric wires fixed to the fixing portion into an inlet side and an outlet side on the outside of the stator core to form the first electric wire to the Nth electric wire from one electric wire;
and forming the parallel winding by connecting the first electric wire to the Nth electric wire on the inlet side and the first electric wire to the Nth electric wire on the outlet side in parallel,
The parallel winding can be formed reliably and easily.

Furthermore, according to the stator winding method of Embodiment 1 performed as described above,
Since the height position of the axially upper end face of the fixing part is installed at a position closer to the center in the axial direction than the height position of the axially upper end face of the insulator,
It is possible to prevent the electric wire from coming off from the inlet and the outlet.

Furthermore, according to the stator winding method of the first embodiment performed as described above,
Since the fixing part includes a guide to prevent the electric wire from slipping,
It is possible to prevent the electric wire from coming off from the fixed part.

Although this application describes exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to application of particular embodiments, and may be used alone or It is applicable to the embodiments in various combinations.
Therefore, countless variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, this includes cases in which at least one component is modified, added, or omitted.

Various aspects of this disclosure are summarized below as appendices.

(Appendix 1)
A stator in which a plurality of coil windings, each having a coil formed on a stator core via an electrically insulating insulator, are arranged in a circular manner in the circumferential direction,
The insulator includes a tooth end covering portion that covers an axial end portion of the tooth portion of the stator core,
an outer flange connected to a radially outer end of the tooth end covering portion, covering an axial end of the yoke portion of the stator core, and rising axially upward;
the outer flange includes an inlet for introducing an electric wire forming the coil and an outlet for leading out the electric wire at different circumferential positions from an axial upper surface to an upper surface of the tooth end surface covering portion,
The coil includes a first electric wire to an Nth electric wire (N is an integer of 2 or more) as the electric wires, and all of the first electric wire to the Nth electric wire are introduced through the inlet and led out through the outlet and wound, and the first electric wire to the Nth electric wire are connected in parallel outside the stator core to form a para-winding,
The first electric wire and the second electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery of the insulator to form a stator.
(Appendix 2)
When N is an integer of 3 or more,
2. The stator according to claim 1, wherein the first electric wire to the Nth electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery of the insulator.
(Supplementary Note 3) The stator according to Supplementary Note 1 or Supplementary Note 2, wherein the circumferential width of the inlet and the outlet is longer than a diameter of the electric wire.
(Supplementary Note 4) A stator according to any one of Supplementary Note 1 to Supplementary Note 3;
a rotor rotatably disposed opposite the stator with a gap therebetween,
(Supplementary Note 5) A winding method for a stator according to any one of Supplementary Note 1 to Supplementary Note 3, comprising:
A stator winding method in which a single piece of the electric wire is introduced through the inlet of the insulator, wound around it, and then led out from the outlet of the insulator to the outside of the stator core, and the led out electric wire is fixed to a fixing portion installed on the outside of the stator core, the process being repeated N times with one continuous piece of the electric wire.
(Additional Note 6) After repeating the above N times,
cutting the wire bundle of the electric wires fixed to the fixing portion into an inlet side and an outlet side on the outside of the stator core to form the first electric wire to the Nth electric wire from one electric wire;
and forming the para-winding by connecting in parallel the first electric wire to the Nth electric wire on the inlet side and the first electric wire to the Nth electric wire on the outlet side.
(Appendix 7) A stator winding method according to appendix 5 or appendix 6, wherein the height position of the axially upper end face of the fixed portion is set at a position closer to the center in the axial direction than the height position of the axially upper end face of the insulator.
(Supplementary Note 8) The stator winding method according to any one of Supplementary Note 5 to Supplementary Note 7, wherein the fixing portion is provided with an anti-slip guide for the electric wire.

1 First insulator, 10 Stator, 11 Rotor, 1T Teeth end covering portion, 1F Chamfered portion, 1OUT Outer flange, 1IN Inner flange, 1S Slot covering portion, 1A Inlet, 1B Outlet, 2 Second insulator, 2A Inlet, 2B Outlet,
2T: tooth end covering portion, 2S: slot covering portion, 3: stator core, 3A: yoke portion, 3B: tooth portion, 3C: shoe portion, 3S: slot portion, 3F: hook, 3F1: convex portion, 3F2: convex portion, 4: coil winding body, 5: coil, 5A: wire bundle, 5AIN: inlet side,
5AOUT: outlet side; 6: winding device; 60: electric wire; 6A: bobbin;
6C tension applying portion, 6D winding portion, 6E nozzle, 6F core fixing portion,
6G lead-in line fixing part.

Claims (8)

A stator in which a plurality of coil windings, each having a coil formed on a stator core via an electrically insulating insulator, are arranged in a circular manner in the circumferential direction,
The insulator includes a tooth end covering portion that covers an axial end portion of the tooth portion of the stator core,
an outer flange connected to a radially outer end of the tooth end covering portion, covering an axial end of the yoke portion of the stator core, and rising axially upward;
the outer flange includes an inlet for introducing an electric wire forming the coil and an outlet for leading out the electric wire at different circumferential positions from an axial upper surface to an upper surface of the tooth end surface covering portion,
The coil includes a first electric wire to an Nth electric wire (N is an integer of 2 or more) as the electric wires, and all of the first electric wire to the Nth electric wire are introduced through the inlet and led out through the outlet and wound, and the first electric wire to the Nth electric wire are connected in parallel outside the stator core to form a para-winding,
The first electric wire and the second electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery of the insulator to form a stator. If N is an integer of 3 or more,
The stator according to claim 1, wherein the first electric wire to the Nth electric wire are wound in order from the inside of the outer periphery of the insulator to the outside of the outer periphery. The stator according to claim 1 or 2, wherein the width of the inlet and the outlet in the circumferential direction is longer than the diameter of the electric wire. The stator according to claim 1 or 2,
a rotor rotatably disposed opposite the stator with a gap therebetween, 3. A stator winding method according to claim 1 or 2, comprising the steps of:
A stator winding method in which a single piece of the electric wire is introduced through the inlet of the insulator, wound around it, and then led out from the outlet of the insulator to the outside of the stator core, and the led out electric wire is fixed to a fixing portion installed on the outside of the stator core, the process being repeated N times with one continuous piece of the electric wire. After repeating the above N times,
The wire bundle of the wires fixed to the fixing part is cut outside the stator core into an inlet side and an outlet side, and one electric wire is separated from the first electric wire to the Nth electric wire. The process of forming up to
forming the para winding by connecting in parallel the cut first electric wire to the Nth electric wire on the inlet side and the first electric wire to the Nth electric wire on the outlet side, respectively; The stator winding method according to claim 5, comprising: A stator winding method as described in claim 5, in which the height position of the axially upper end face of the fixed part is set at a position closer to the axial center than the height position of the axially upper end face of the insulator. The stator winding method according to claim 5, wherein the fixing portion is provided with a guide to prevent the wire from slipping.