JPH11150900A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a coil space factor of a motor and, at the same time, to tightly adhere a coil to rising steps, by forming a bobbin to have a core section and flange sections which are tilted outward as a whole at both end sections of the bobbin. SOLUTION: A coil bobbin 1 is provided with flange sections 6a and 6b at both ends of a rectangular core section 4 and one flange section 6a is formed of a plate-like member which is formed nearly perpendicularly to the core section 4. The other flange section 6b is formed of a plate-like member provided with a step section 11 having concentrically formed steps, so that the step sections 11 may be inclined outward from the flange section 6a. Therefore, the flange section 6b has steps on both inside and outside and the planes connecting the bottom sections of the steps are tilted by 60±5 deg. against the teeth surface 3 of a magnetic pole. Then, a wire 7 is tightly wound in layers around the area of the coil bobbin 1 controlled by the flange sections 6a and 6b and core section 4. Therefore, the occupying space of the wire 7 can be expanded, because the flange sections 6a and 6b can be utilized widely due to the outward inclined parts though the number of tuns of the winding 7 varies depending upon the steps of the step section 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor having a stator structure of an electric motor in which a coil formed by winding a wire around a winding frame is mounted on a plurality of magnetic pole teeth and incorporated into a stator yoke. In particular, the present invention relates to an electric motor having a winding structure that increases the space factor of a coil in the volume of a stator and has good adhesion accuracy.

[0002]

2. Description of the Related Art In general, as shown in FIGS. 27 and 28, a stator of an electric motor is formed by winding a wire 7 such as a fusible polyurethane-coated copper wire around a coil bobbin (winding frame) 1 to form a coil 2. The coil bobbin 1 on which the coil 2 is wound is inserted into each of the magnetic pole teeth 3 to assemble. As shown in FIG. 27, the coil bobbin 1 has a substantially rectangular parallelepiped core portion 4 and a rectangular hole 5 having a rectangular cross section corresponding to the outer shape of the magnetic pole teeth 3 formed inside. At both ends of the core portion 4, rectangular thin plate-shaped flange portions 6 are provided so as to face each other in parallel. The square hole 5 of the core 4 penetrates the flange 6.

A wire 7 such as a copper wire is wound around the coil bobbin 1 in a layered manner in a multilayer manner. Both ends of each layer are restrained by the flange portion 6 to prevent the wire 7 from slipping. A predetermined number of these coils 2 are formed, and each of them is
To fit. The magnetic teeth 3 have a transverse section that forms a half-moon portion 8a on one end side, expands in a half-moon shape, and is gradually narrowed toward the other end side to form a rectangular portion 8b. The vertical cross-sectional area of the rectangular portion 8b is formed so as to fit the square hole 5 of the coil bobbin 1 exactly, and the coil bobbin 1 is fitted. At that time, the coil bobbin 1 is inserted and locked / fixed to the half-moon portion 8a where the rectangular portion 8b of the magnetic pole teeth 3 starts to spread in a half-moon shape. In this state, the half-moon portion 8a and the flange portion 6
A space G is formed between. Then, in a state where the coil bobbin 1 is incorporated in the magnetic pole teeth 3, the rectangular portion 8 b side of the magnetic pole teeth 3 is inserted, fixed, and assembled into grooves 10 equally provided on the inner peripheral side of the yoke 9. By this assembly, the inner circumferential surface of the half-moon portion 8a of the magnetic pole tooth 3 is arranged on the same circumference. Therefore, when a rotor (not shown) is incorporated in the stator, the distance from the outer peripheral surface of the rotor becomes uniform, and the stator can be smoothly rotated.

[0004]

In the conventional electric motor stator, the flange 6 of the coil bobbin 1 is formed so as to face in parallel with the core 4 interposed therebetween, so that the number of coils 2 is the same. The size of the flange 6 is regulated by the inner diameter of the yoke 9 and the outer diameter of the rotor to be assembled. Since the inner diameter of the yoke and the outer shape of the rotor are arc-shaped, and the flange 6 is a straight line inscribed or circumscribed with the arc, the outer periphery of the coil bobbin 1, that is, between the flange 6 and the inner periphery of the yoke 9, and the flange. A space G is formed between the magnetic teeth 6 and the half-moon portion 8a of the magnetic pole teeth 3, and the coil 2
There is a drawback in improving the space factor of

The present invention has been made in view of these circumstances, and provides a motor stator having an improved coil space factor, and an aligned winding having good coil adhesion.
It is an object of the present invention to provide an electric motor using a stator having a coil with good adhesiveness, in which a step is always performed with high accuracy when stepping up to an upper layer at an end portion of each winding layer.

[0006]

According to the first aspect of the present invention, there is provided an electric motor having a stator and a rotor formed by incorporating a winding frame on which a wire is wound around a magnetic pole tooth into a stator yoke. The electric motor is characterized in that the winding frame has a shape having a winding core and flanges at both ends thereof, and at least one of the flanges is inclined outward as a whole.

[0007] According to the second aspect of the present invention,
The electric motor is characterized in that the inclination of the flange is not provided at a portion where the step of the winding end of the wire occurs.

[0008] According to the means of the invention of claim 3,
The electric motor is characterized in that the inclination of the flange portion is different from that of the other portion at the portion where the winding layer end of the wire rises.

According to the means of the invention of claim 4,
The inclination of the flange portion is a step-like step, and is an electric motor.

According to the fifth aspect of the present invention,
The inclination of the flange is an inclined surface, and the inclination angle is 60 ± 5 degrees with respect to the core.

Further, according to the means of the present invention,
The height H of the step of the flange is determined by the standard finished outer diameter of the wire as d.
And = 31/2/2 × ( ¹ ± 0.05) ×
dn (where n is an integer of 1 or more).

Further, according to the invention according to claim 7,
The inclination of the flange portion is a combination of an inclined surface and a step, and the length N1 of the step is N1 = (1 ± 0.05) × dn (where n is the standard finished outer diameter of the wire wire). Is an integer of 1 or more).

Further, according to the means of the invention of claim 8,
The inclination of the flange portion is a combination of an inclined surface and a vertical surface perpendicular to the winding core portion. The length N2 of the vertical surface is N2 = (where the standard finish outer diameter of the wire is d). 3 ^1/2 /
2) × (1 ± 0.05) × dn (where n is an integer of 1 or more).

According to a ninth aspect of the present invention, there is provided:
An electric motor characterized in that a winding groove is provided on a surface of the core of the winding frame.

According to a tenth aspect of the present invention, there is provided an electric motor characterized in that the flange portion is provided with an escape groove for wire withdrawal, a terminal connecting portion, or a projection for holding a crossover wire of the in-phase coil. is there.

According to the eleventh aspect of the present invention, in the electric motor, the bobbin is dividable in the axial direction.

According to a twelfth aspect of the present invention, the electric motor is characterized in that the winding frame can be connected in a ring shape.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1, 2, 3, and 4
Explanation will be made based on FIG. Coil bobbin (reel)
Reference numeral 1 denotes flanges 6a and 6b formed at both ends of a rectangular core 4. One of the flanges 6a is formed in a flat plate shape and is substantially perpendicular to the core 4, and the other flange 6b is formed so as to be inclined outwardly on the opposite side of the one flange 6a. A step-shaped portion 11 having a concentric step formed in the shape member is formed. Since the flange portion 6b is formed of a plate-like member as described above, a similar step is formed on both the outside and the inside.
This step is formed on a slope where the surface connecting the bottoms of the steps is 60 degrees with respect to the three faces of the magnetic pole teeth. A wire 7 is wound around the area of the coil bobbin 1 that is regulated by the flanges 6a and 6b and the core 4 in a layered manner as in the prior art.

Since the stepped portion 11 is formed on the flange portion 6b, the number of turns for each layer differs according to the step of the stepped portion 11, but the coil bobbin 1 which can be fitted to the magnetic pole teeth 3 of the same size is provided. The area in which the wire 7 can be wound is wider than that of the conventional coil bobbin 1 because the flanges 6a and 6b are inclined outward, so that the space occupied by the wire 7 can be greatly increased.

Since a stepped recess is formed outside the flange 6b of the coil bobbin 1, the half-moon portion 8a of the magnetic pole teeth 3 is covered with the outer recess of the flange 6b as shown in FIGS. Can be deeply fitted. In this manner, in a state where the coil bobbin 1 on which the coil 2 is wound is assembled to the magnetic pole teeth 3, the outer ends 3 a of the magnetic pole teeth 3 are inserted into the concave portions 10 provided on the inner peripheral side of the yoke 9 and assembled.

The winding of the wire 7 on the stepped portion 11 will be described in detail with reference to FIGS. 4 and 5. In FIG. 4, after the wire 7 is wound on the coil bobbin 2 in two layers, the process proceeds to the next step and the same process is performed. Layer-wrapped. Thereafter, winding is performed for each step in the same manner. In order to obtain the height (DF in the figure) from the surface of the winding core 4 of the coil bobbin 1 to the lower portion of the second-layer wire 7 at that time, when the standard finished outer diameter of the wire 7 is d, the adjacent 3
Since the triangle ABC connecting the center points A, B, and C of each of the wires 7 is a regular triangle, a middle point E between the points A and BC is obtained.
Length AE's to become 3 ^1/2 / 2 × d. The length AD from the point A to the intersection D with the AE of the circle centered on the point A and the length E from the point E to the intersection F between the extension of the AE and the four surfaces of the core 4
Since F is the radius of the coil 2, the length of the DF, that is, the height h, is 3 ^1/2/2 × d.

Similarly, the height of the second layer is 3 ^1/2/2 ×
d. Therefore, the height H of the step is 2h. Since then
Since the height H increases by h each time the coil 2 increases by one layer, n is the number of layers of the coil 2 per one stage (an integer of 1 or more).
Further, the error of the standard finished outer diameter of the coil 2 is set to 5
%, And considering this, the height of the step is h × (1 ± 0.
05) × n. FIG. 4 shows a case where d is 1.0 mm and n is 2, and FIG. 5 shows a case where d is 0.5 mm and n is 4.

(Embodiment 2) A description will be given based on FIGS. 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b).

In the first embodiment, the step portion 11 is formed by providing a step on one of the flange portions 6b. However, in the present embodiment, the step is not provided, but is simply inclined. The form of the vicinity will be described with reference to FIGS.

From the winding core 4 of the coil bobbin 1, one inclined portion 12 extends at an inclination of 60 degrees. Since the slope 12 is formed of a plate-like member, a similar slope is formed outside the slope 12. Next, the wire 7 is wound closely along each gradient along the gradient. Each layer of the wire 7 is aligned and wound according to the gradient of the gradient section 12. Since the respective layers of the wire 7 are wound closely, no winding deviation occurs due to the gradient, and the coil 2 wound more frequently than the conventional one by the gradient in the gradient portion 12 as in the first embodiment. Can be manufactured. When the coil bobbin 1 around which the coil 2 is wound is inserted into the magnetic pole teeth 3 from the side where the inclined section 12 is provided, the inclined section 12 can enter the magnetic teeth 3 to a position covering the half-moon section 8a shown in FIG. The space G between the coil bobbin 1 and the magnetic pole teeth 3 becomes extremely small, so that the number of coils 2 can be increased effectively and an efficient stator can be manufactured.

It is also possible to provide a surface 21 parallel to the surface of the winding core 4 or a surface 22 perpendicular to the surface of the core 4 as shown in FIG. 7A. The length of the parallel surface 21 and the length of the vertical surface 22 are as follows. FIG.
In (a), the length of βγ is equal to the height h between the four winding cores and the second-layer wire 7 described in the first embodiment.
Further, since the triangle αβγ in FIG. 7A is a right triangle with an angle γαβ = 60 °, the length of the parallel plane, that is, αβ, is d. That is, when n is an integer of 1 or more and the error of the standard finished outer diameter of the coil 2 is set to 5% and this is taken into consideration, the length N of the parallel surface is (1 ± 0.05) × d × n. Also,
In FIG. 7B, the length of β′γ ′ is h when considered in the same manner as in FIG. Also, the triangle α′β′γ ′ becomes the angle α′γ ′
Since β ′ = 60 °, the length of the vertical plane, that is, α′γ ′, is 3 ^1/2 × d. Therefore, if n is an integer of 1 or more and the error of the standard finished outer diameter of the coil 2 is 5%, the length of the vertical surface is 3 ^1/2 × (1 ± 0.05) × d ×
n.

Further, as shown in FIG. 8, a step connecting the concave portions of the steps of the step-like portion 11 is provided on the inclined surface so as to be 60 ° with respect to the three faces of the magnetic pole teeth, or as shown in FIG. Is formed on the inclined surface so that the surface connecting the magnetic pole teeth is at an angle of 60 ° with respect to the surface of the magnetic pole teeth 3, so that the alignment winding can be facilitated.

In each of the above embodiments, the coil 7 is formed by winding the wire 7 around the coil bobbin 1 as shown in FIG. 1, and the square hole 5 of the coil bobbin 1 is inserted and fixed in the magnetic pole teeth 3. However, as shown in FIG. 10, the coil bobbin 1 may be divided into two parts in the axial direction of the electric motor and mounted on the magnetic pole teeth 3.

Further, as shown in FIG. 11, the coil bobbin 1 is connected in a ring shape, as shown in FIG. 12, the protrusion 14 for holding the crossover 13 on the yoke side (not shown) of the coil bobbin 1 and the terminal of the coil 2 are processed. By providing the connection portion 15 and the relief groove, the workability of assembling the motor is improved.

Further, as shown in FIG. 13, the square where the wire 7 of the coil bobbin 1 is formed has a roundness larger than the standard finished outer diameter of the coil 2, or the coil bobbin 1 is wound around a square or square where the wire 7 is formed as shown in FIG. 14. The provision of the groove 16 facilitates the alignment winding.

In the above embodiments, the angle of the step or the slope provided on the coil bobbin is set to 60 degrees.
The same effect can be obtained even in the range of about 5 degrees.

(Embodiment 3) Next, in an aligned winding having good adhesion of a coil, when stepping up to an upper layer at the end of each winding layer, the stepping up is always performed with high accuracy. Hereinafter, the stator of the electric motor that can be wound well will be described with reference to FIGS.

As shown in FIG. 15, the stator includes a magnetic pole tooth 3 formed by laminating a plurality of punched electromagnetic steel sheets, and an annular yoke 9 arranged on the outer periphery thereof. The magnetic pole teeth 3 and the yoke 9 are divided. After the coil bobbin (winding frame) 1 on which the coil 2 is wound is mounted on the magnetic pole teeth 3, the outer end of the magnetic pole teeth 3 is inserted into a concave portion 10 formed inside the yoke 9. 3a is fixedly attached to the base.

As shown in FIG. 16, the coil bobbin 1 has a rectangular core 4 and flanges 50a, 50a formed at both ends thereof.
b. Collar 50a at the tip of magnetic teeth 3
Of the contact portion between the inner side and the core 4, the three surfaces except for the staggered portion (the upper surface of the core 4 in FIG. 16) when the stairs are formed when climbing to the upper layer at the end of each winding layer are approximately A 60-degree slope is provided on three surfaces.

FIG. 15 shows the core 4 of the coil bobbin 1.
Has shown the case where is a rectangular shape, but the core part 4 may use arbitrary shapes, such as a cylindrical shape and a polygonal shape. In this case, similarly, a slope of the same angle is provided in a portion other than a portion where the step of the winding layer end on the inner side surface of the flange portion occurs, and the step-up portion is not provided with a slope or different from the above-described slope. A similar effect can be obtained by making the shape.

The coil 2 is closely wound around the coil bobbin 1 by passing the wire 7 through the clearance groove 61 provided in the flange 50b on the yoke 9 side, similarly to the prior art. Since the step-up of every two winding layers of the coil occurs between the previously wound coil and the flange 50a, the dried bird portion does not shift as shown in FIG. 17 and the alignment is not deteriorated.

Also, as shown in FIG. 18, when the ratio of inclination to the core 4 is large and the number of coils wound on the upper layer is larger than the number of coils on the first layer, the staggered stairs A step-like projection 62 is provided at the location where the portion occurs (in FIG. 18, the upper surface of the core 4).

After the wire 7 is wound in two layers as shown in FIG. 19, the process proceeds to the next stage, and the wire 7 is similarly wound in two layers. Step 6
The height H of the coil 3 is the same as the height of the bottom of the coil so that the coils 2 are arranged in a line.

More specifically, referring to FIG.
Where d is the standard finished outer diameter of the wire 7 constituting
A triangle A connecting the centers of three adjacent coils 2
BC is the length of the AE of because equilateral triangle Fig. 3 ^1/2 / 2 × d
Becomes Since the length of the EF is the radius of the coil 2, d /
It becomes 2. The length of AF is ( ^31/2/2 × d). On the other hand, since the length of AD is also the radius of the coil 2, it becomes d / 2,
The length of the DF, that is, the height h1 is 3 ^1/2/2 × d. Figure height in the same manner h2 becomes a 3 ^1/2 / 2 × d.
Therefore, the height H of the step 63 is 3 ^1/2/2 × d + d
/ 2. As described above, since the coil 63 having an even number of layers is provided at the step 63 of one step, the number of layers of the coil 2 per step is set to 2n (n is an integer of 1 or more), and the coil 2 has a thickness outside the standard finish. Assuming that the diameter error is 5%, the height H of the step 63 is 3
^1/2 x (0.05 per soil) x d x n.

The above is the case where each step is at a right angle, and it may not be appropriate if the step has a chamfer 14 as shown in FIG. The angle of the chamfer 64 is preferably about 45 degrees so that the coil can be easily fixed. Similar effects can be obtained by providing an inclined surface 65 having an inclination angle different from those of the other three surfaces as shown in FIG. 21 instead of the step-like projections.

As shown in FIGS. 22 and 23, the flange 50b of the coil bobbin 1 on the yoke 9 side is provided with a projection 67 for holding a crossover (not shown) between the in-phase coils, a terminal portion 69 for connecting the terminal of the coil 5, and a relief groove. By providing the motor, the workability of motor assembly can be improved.

Further, as shown in FIG. 24, by providing a roundness or a winding groove 70 having a diameter equal to or larger than the standard finished outer diameter of the coil 2 in the square of the winding core 4, the winding can be made accurate and easy.

In addition, the coil bobbin 1 is not used at the time of winding, and the coil 2 wound by a winding machine may be fixed and then incorporated in the magnetic pole teeth 3 molded in advance.

Usually, the coil bobbin 1 is mounted on the magnetic pole teeth 3 from the opening 5 (see FIG. 22) of the coil bobbin 1 after molding. However, as shown in FIG. 25, the coil bobbins 1a and 1b are mounted in the axial direction of the electric motor. The end plate 72 which is divided into two parts or connected annularly as shown in FIG. 26 or an integral molding method can be applied to an integral stator core which is not divided.

Further, the winding of the wire around the coil bobbin 1 can be carried out by using an air-core coil jig (not shown) having the same shape as the coil bobbin 1, and the wound coil 2 can be mounted on the coil bobbin 1.

With the structure shown in each of the above embodiments, a step is provided on the magnetic pole teeth 3 side of the coil bobbin 1 around which the wire 7 used for the stator of the electric motor is wound, so that the space factor of the coil 2 is increased. The characteristics of the stator have been improved, and miniaturization has become possible.

The wire 7 used for the stator of the electric motor
By providing a slope on the side of the magnetic pole teeth 3 of the coil bobbin 1 on which the coil is wound, the space factor of the coil 2 can be increased, the characteristics of the stator of the electric motor can be improved, and the motor can be reduced in size.

The wire 7 used for the stator of the electric motor
A step or a slope is provided on the side of the magnetic pole teeth 3 of the coil bobbin 1 on which the coil is wound, and the coil bobbin 1 can be disassembled in the axial direction of the motor, so that the characteristics of the stator of the motor can be improved and the motor can be downsized. The assemblability has been greatly improved.

The wire 7 used for the stator of the electric motor
Since the step or the slope is provided on the side of the magnetic pole teeth 3 of the coil bobbin 1 on which the coil is wound, the characteristics of the stator of the electric motor can be improved and the motor can be miniaturized, and the stator of the electric motor can be assembled with high precision. .

The wire 7 used for the stator of the electric motor
A step or an inclined surface is provided on the side of the magnetic pole teeth 3 of the coil bobbin 1 on which the coil is wound, so that the characteristics of the stator of the electric motor can be improved and the motor can be reduced in size. Since the coil bobbin 1 is provided, accurate winding can be performed on the coil bobbin 1.

The wire 7 used for the stator of the electric motor
By providing a step or a slope on the magnetic pole teeth 3 side of the coil bobbin 1 around which the coil 2 is wound, the space factor of the coil 2 is increased,
The characteristics of the motor have been improved, and the motor can be downsized.

[0053] In addition, the coil winding of the coil 2 has good adhesion, and when stepping up to an upper layer at the terminal end of each winding layer, the step is always accurately performed, and the coil winding having good adhesion is provided. Is obtained.

[0054]

According to the present invention, as described above, the space capable of winding in the slot of the electric motor is enlarged,
Since the arrangement winding with good adhesion can be formed, the coil space factor can be increased, and the motor characteristics can be improved and the size can be reduced.

As a result, it is possible to reduce the size and weight of the motor and to increase the torque and the copper loss by increasing the thickness of the coil.

[Brief description of the drawings]

FIG. 1 is a perspective view of a coil bobbin used for a stator of an electric motor according to the present invention.

FIG. 2 is a plan view showing a stator part of the electric motor of the present invention.

FIG. 3 is an enlarged view of a main part of a coil bobbin used for a stator of the electric motor of the present invention.

FIG. 4 is an explanatory view showing a state of a wire to a coil bobbin according to the present invention.

FIG. 5 is a sectional view illustrating the relationship between the coil bobbin and the magnetic pole teeth of the present invention.

FIG. 6 is an explanatory view showing another embodiment of the present invention.

FIG. 7 is an explanatory view showing a modification of the present invention.

FIG. 8 is a sectional view of a modification of the present invention.

FIG. 9 is a sectional view of another modification of the present invention.

FIG. 10 is a perspective view showing the division of a bobbin according to an embodiment of the present invention.

FIG. 11 is a plan view showing another example of the embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating a connection state of crossover wires of the in-phase coil of the present invention.

FIG. 13 is a perspective view showing an example of a coil bobbin according to the embodiment of the present invention.

FIG. 14 is a perspective view showing a winding groove of the coil bobbin according to the embodiment of the present invention.

FIG. 15 is a plan view of a stator according to an example of the embodiment of the present invention.

FIG. 16 is a perspective view of a coil bobbin according to an example of the embodiment of the present invention.

FIG. 17 is an explanatory diagram of a step-up portion of a coil according to an example of an embodiment of the present invention.

FIG. 18 is a perspective view showing an example of the coil bobbin according to the embodiment of the present invention.

FIG. 19 is an explanatory view showing an example of a state of a wire to a coil bobbin according to the present invention.

FIG. 20 is an explanatory diagram illustrating an example of an embodiment of the present invention.

FIG. 21 is a perspective view showing an example of a coil bobbin according to the embodiment of the present invention.

FIG. 22 is a perspective view showing an example of the coil bobbin according to the embodiment of the present invention.

FIG. 23 is a perspective view showing an example of the coil bobbin according to the embodiment of the present invention.

FIG. 24 is a perspective view showing an example of the coil bobbin according to the embodiment of the present invention.

FIG. 25 is a perspective view showing an example of the coil bobbin according to the embodiment of the present invention.

FIG. 26 is a perspective view showing annularly connected end plates according to an embodiment of the present invention.

FIG. 27 is a perspective view of a coil bobbin used in a conventional embodiment.

FIG. 28 is a plan view of a stator of an electric motor used in a conventional embodiment.

[Explanation of symbols]

1 ... coil bobbin, 2 ... coil, 3 ... magnetic pole teeth, 4
... Core part, 5 ... Square hole, 6a, 6b, 50a, 50b ... Flange part, 7 ... Wire, 8a ... Semi-moon part, 8b ... Rectangular part, 9 ...
Yoke, 10 ... groove, 11 ... step-like part, 12 ... slope part, 1
3 ... crossover, 14 ... protrusion, 15 ... connecting part, 16, 70 ...
Winding groove

Claims (12)

[Claims] 1. An electric motor having a stator and a rotor in which a winding frame on which a wire is wound is mounted on a magnetic pole tooth and incorporated in a stator yoke, wherein the winding frame has a winding core and flanges at both ends. An electric motor characterized by having a shape having at least one of the flanges inclined outward as a whole. 2. The electric motor according to claim 1, wherein the inclination of the flange is not provided at a portion where the winding end of the wire rises. 3. The electric motor according to claim 1, wherein the inclination of the collar portion is different from that of the other portion in the portion where the winding layer end of the wire rises. 4. The electric motor according to claim 1, wherein the inclination of the flange is a step. 5. The electric motor according to claim 1, wherein an inclination of the flange portion is an inclined surface, and the inclination angle is 60 ± 5 degrees with respect to the core. . The height H of the step of wherein the collar portion, when the standard finished outer diameter of the wire was d,且^{= (3 1/2 / 2) ×} (1
The electric motor according to claim 4, wherein (± 0.05) × dn (where n is an integer of 1 or more). 7. The inclination of the flange portion is a combination of an inclined surface and a step, and the length N1 of the step is N1 = (1 ± 0.05) ×, where d is the standard finish outer diameter of the wire wire. 4. The electric motor according to claim 1, wherein d is dn (where n is an integer of 1 or more). 5. 8. The inclination of the flange portion is a combination of an inclined surface and a vertical surface perpendicular to the core portion, and the length N2 of the vertical surface is defined as a standard finish outer diameter of the wire d. When N2
= ( ^31/2/2 ) × (1 ± 0.05) × dn (where n
Is an integer of 1 or more). 9. The electric motor according to claim 1, wherein a winding groove is provided on a surface of the winding core portion of the winding frame. 10. The electric motor according to claim 1, wherein the flange portion is provided with an escape groove for drawing out a wire, a terminal connection portion, or a projection for holding a crossover wire of the in-phase coil. . 11. The electric motor according to claim 1, wherein the bobbin is dividable in an axial direction. 12. The electric motor according to claim 1, wherein the winding frames can be connected in a ring shape.