KR20230092512A - Stator comprising three assembly teeth and stator core comprising three integral teeth - Google Patents

Abstract

According to various embodiments, the stator 4 includes a stator core body 42 having a ring shape and three integral teeth 43 connected to the stator core body and integrally formed with the stator core body. It may include a stator core 41, three assembly teeth 44 connected to the stator core body, and coils 59A and 59B wound around the three integral teeth and the three assembly teeth, respectively.

Description

A stator core including three integral teeth and a stator including three assembling teeth

Various embodiments of the present disclosure relate to a stator core including three integral teeth and a stator including three assembly teeth.

An electric motor is a device that converts electrical energy into mechanical energy to obtain rotational power. Electric motors are widely used in various fields because they are easy to start and operate. Electric motors are widely used in precision machinery and portable devices because of their simple operation principle, low noise and vibration generation, and high output despite their small size and light weight.

The stator may include a plurality of teeth. The three-phase stator may include six teeth spaced apart in the circumferential direction. Each of the six teeth may be provided at intervals of 60 degrees. Among the six teeth, pairs of teeth provided opposite to each other may have the same phase. Any two of the six teeth may have a U phase, the other two teeth may have a V phase, and the remaining two teeth may have a W phase.

Each of the teeth may include a tooth body having a relatively small width and capable of supporting a coil, and a tooth head formed at an end of the tooth body. A slot may be provided between two adjacent teeth. The slots may include slot openings and dead zones to prevent contact of the teeth with the nozzles supplying the coils. For example, a slot opening may be a space provided between two adjacent tooth heads. A dead zone means a space in which a coil cannot be positioned. When all of the teeth are integrally formed, there is a limit to reduction since the width of the slot opening must be greater than the thickness of the nozzle. In addition, when all of the teeth are integrally formed, there is a possibility that the size of the dead zone may be large.

Various embodiments may provide a stator core including three integral teeth and a stator including three assembly teeth.

According to various embodiments, the stator 4 includes a stator core body 42 having a ring shape and three integral teeth 43 connected to the stator core body and integrally formed with the stator core body. It may include a stator core 41, three assembly teeth 44 connected to the stator core body, and coils 59A and 59B wound around the three integral teeth and the three assembly teeth, respectively.

According to various embodiments, the stator 4 includes a stator core body 42 having a ring shape and three integral teeth 43 connected to the stator core body and integrally formed with the stator core body. A stator core 42, three assembled teeth 44 connected to the stator core body, and coils 59A and 59B wound around the three integral teeth and the three assembled teeth, respectively, wherein the stator Based on the circumferential direction of the core body, the integrated teeth and assembly teeth are alternately disposed, each of the assembly teeth is connected to the stator core body, and the width becomes narrower as it approaches the stator core body. An assembly type tooth base including a shape, an assembly type tooth body protruding from an outer surface of the assembly type tooth base and supporting the coil, and provided at an end of the assembly type tooth body to prevent the coil from coming off. It may include an assembly-type tooth head that does.

According to various embodiments, since the stator includes three assembling teeth, the width of the slot opening can be set very small, and the coil can be provided even in an area corresponding to an existing dead zone. Compared to the size of the motor, the amount of wound coils can be increased. With the amount of added coils, the efficiency and output of the motor can be improved.

According to various embodiments, contact between the nozzle and the coil may be prevented in the process of winding the coil around the three assembly teeth and/or the three integrated teeth. When contact between the nozzle and the coil is prevented, damage to the coil can be prevented, and thus the defect rate of the stator can be reduced.

According to various embodiments, since three teeth are integrally formed and the remaining three teeth are assembled, the number of parts may be relatively small compared to a stator in which all teeth are assembled. A reduction in counter electromotive force may be relatively small.

According to various embodiments, the stator may configure any one of the two U-phase, V-phase, and W-phase teeth as an assembly type and integrally configure the other tooth. Through such a structure, the counter electromotive force reduction amount can be reduced.

In addition to this, various effects identified directly or indirectly through this document may be provided.

1 is a perspective view illustrating a compressor according to various embodiments.
FIG. 2 is a perspective view of the compressor in FIG. 1 with the container removed.
3 is a cross-sectional view taken along line AA of FIG. 2 .
4A is a plan view illustrating a stator according to an exemplary embodiment.
FIG. 4B is a plan view illustrating a state in which the stator shown in FIG. 4A is separated.
5A is a plan view illustrating a state in which a coil is wound around a separated stator according to an exemplary embodiment.
FIG. 5B is a plan view showing an assembled state of the stator shown in FIG. 5A.
6A is a plan view illustrating a state in which a stator is separated according to an exemplary embodiment.
FIG. 6B is a plan view illustrating an assembled state of the stator shown in FIG. 6A.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited. A (e.g., first) component is said to be "coupled" or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

According to various embodiments, each component (eg, module or program) of the components described above may include a single object or a plurality of objects, and some of the multiple objects may be separately disposed in other components. . According to various embodiments, one or more components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. . According to various embodiments, operations performed by modules, programs, or other components are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

1 is a perspective view showing a compressor according to a first embodiment of the present invention.

Referring to FIG. 1, a hermetic compressor 1 includes a compression unit 10 sealed in an inner space of a container 2, an electric motor 20 providing power to the compression unit 10, and compression A support frame 30 supporting the unit 10 and the electric motor 20 may be included. The vessel 2 may include an upper vessel 2-1 and a lower vessel 2-2. The upper container 2-1 and the lower container 2-2 may be coupled to each other while accommodating the compressor 1 therein.

FIG. 2 is a perspective view of the compressor from which the container is removed in FIG. 1, and FIG. 3 is a cross-sectional view taken along line A-A in FIG.

Referring to FIGS. 2 and 3, the compression unit 10 has a cylinder 12 having a cylindrical compression space PS for compressing a gas, for example, a refrigerant, and reciprocating in the compression space PS. It may include a piston 14 that operates and a connecting rod 16 provided between the piston 14 and the electric motor 20 to convert the rotational motion of the electric motor 20 into linear reciprocating motion of the piston 14.

The electric motor 20 may transmit power to the piston 14 of the compression unit 10 so that the piston 14 performs an operation of sucking and compressing gas. The electric motor 20 includes a stator 22, a cylindrical rotor 24 that surrounds and rotates the stator 22, and a rotating shaft that is connected to the center of the rotor 24 and transmits the rotational force of the rotor 24. (26) may be included. In addition, although not shown in FIGS. 1 and 2 , the electric motor 20 may include one or more bearings supporting the rotation shaft 26 .

The motor 20 may include a power supply unit and a switching unit receiving power from the power supply unit and applying it to the winding coil.

The power supply unit may supply DC power by rectifying and converting the input AC power. The power supply unit may include a rectifier circuit composed of a rectifier and a smoothing capacitor. The power supply unit may convert the rectified DC power into three-phase AC power in the form of a pulse having an arbitrary variable frequency.

The switching unit may include a plurality of switching elements. As the switching elements are turned on or off, power supplied from the power supply unit may be applied to the stator 22 .

The electric motor 20 may include a controller for driving control as a system.

4A is a plan view illustrating a stator according to an exemplary embodiment, and FIG. 4B is a plan view illustrating a state in which the stator illustrated in FIG. 4A is separated.

Referring to FIGS. 4A and 4B , a stator core including three integral teeth and a stator (4, hereinafter referred to as “stator”) including three assembly teeth include a stator core 41 and a stator core 41 ) may include three assembly teeth 44 assembled to. The stator core 41 may include a stator core body 42 constituting the center of the stator 4 and three integral teeth 43 integrally formed with the stator core body 42 .

The stator core body 42 may have a ring shape. For example, the stator core body 42 may have a circular ring shape. It should be noted that the shape of the stator core body 42 is not limited thereto. For example, the stator core body 42 may have a polygonal ring shape. The stator core body 42 may have a hole for accommodating a shaft (not shown) in a central portion. A plurality of grooves may be provided on the inner surface of the stator core body 42 . The shaft may have a protrusion accommodated in the corresponding groove. The plurality of grooves may receive at least a portion of the shaft, and the shaft and the stator core body may be fixed. As another example, a plurality of protrusions protruding toward the center may be provided on an inner surface of the stator core body 42, and the shaft may have a groove accommodating the protrusions.

The three integral teeth 43 are connected to the stator core body 42 and may be integrally formed with the stator core body 42 . The three integral teeth may be equally spaced. The three integral teeth 43 may be provided 120 degrees apart from each other. Each of the three integral teeth 43 may have a different phase. For example, the three integral teeth 43 may include a first integral tooth 43A, a second integral tooth 43B and a third integral tooth 43C. For example, the first integral tooth 43A may have a U phase, the second integral tooth 43B may have a V phase, and the third integral tooth 43C may have a W phase.

The three assembly teeth 44 can be assembled to the stator core body 42 . The three assembled teeth 44 may be configured separately from the stator core body 42 . The three stator teeth can be arranged equally spaced. The three assembly teeth 44 may be provided 120 degrees apart from each other. Each of the three assembly teeth 44 may have a different phase. For example, the three building teeth 44 may include a first building tooth 44A, a second building tooth 44B and a third building tooth 44C. For example, the first built-up teeth 44A may have a U-phase, the second built-up teeth 44B may have a V-phase, and the third built-up teeth 44C may have a W-phase.

The integrated teeth 43 and the assembly teeth 44 provided on opposite sides of the stator core body 42 may have the same phase. For example, the first integrated teeth 43A and the first assembly teeth 44A provided on opposite sides of the stator body core 42 may have a U-phase. The second integral teeth 43B and the second assembly teeth 44B provided on opposite sides of the stator body core 42 may have a V-phase. The third integrated teeth 43C and the third assembly teeth 44C provided on opposite sides of the stator body core 42 may have a W phase.

Based on the circumferential direction of the stator core body 42, integral teeth 43 and assembly teeth 44 may be alternately arranged. On a clockwise or counter-clockwise basis, integral tooth 43 may be placed between two other assembly teeth 44 . On a clockwise or counterclockwise basis, the build-up teeth 44 can be positioned between two other integral teeth 43 . According to this arrangement, in a state in which the three assembly teeth 44 are separated, the three integral teeth 43 may be 120 degrees apart from each other, and the adjacent two integral teeth of the three integral teeth 43 Between the teeth 43, sufficient space can be provided for winding the coil. The operator can wind the coil around the three integral teeth 43 while leaving the three assembled teeth 44 separate.

The integral tooth 43 includes an integral tooth base 431 protruding from the outer surface of the stator core body 42, an integral tooth body 432 protruding from the outer surface of the integral tooth base 431, and an integral tooth base 431. It may include an integral tooth head 433 provided at the end of the tooth body 432.

The assembly tooth 44 includes an assembly tooth base 441 connected to the stator core body 42 and an assembly tooth body 442 protruding from the outer surface of the assembly tooth base 441. It may include an assembled tooth head 443 provided at the end of the mold tooth body 442. The built-up teeth 44 can for example be glued to the stator core body 42 and integral teeth 43 . For example, an adhesive, for example, a bond, may be provided between the assembly teeth 44 and the stator core body 42 or between the assembly teeth 44 and the integral teeth 43 .

The assembled tooth base 441 may have an inner surface provided in a surface contactable state with the stator core body 42 . For example, the assembled tooth base 441 may have a concave inner surface contactable with a convex outer surface of the stator core body 42 . Specifically, the assembled tooth base 441 includes an inner surface 441a capable of surface contact with the stator core body 42 and both side surfaces 441b provided in a surface contactable state with two adjacent integral teeth 43; 441c), and an outer surface 441d provided opposite the inner surface 441a and facing the assembled tooth head 443. For example, in the case of a built-in tooth base 441 of a first built-up tooth 44A, the first side surface 441b is in surface contact with the second built-in tooth 43B, and the second side surface 441c is in surface contact with the second built-in tooth 43B. It can make surface contact with three integral teeth 43C.

The assembled tooth base 441 can contact the stator core body 42 and the two integral teeth 43 on at least three sides. For example, while the inner surface of the assembled tooth base 441 is connected to the stator core body 42, both sides of the assembled tooth base 441 are connected to the integral teeth 43, thus ensuring a stable coupling state. can keep The assembled tooth base 441 may have a shape in which the width becomes narrower as it approaches the stator core body 42 . According to this shape, the user can bring the assembly tooth 44 close to the stator core 42 without interfering with the adjacent two integral teeth 43 .

The assembled tooth body 442 may have a shape protruding outward from the outer surface of the assembled tooth base 441 . The built-in tooth body 442 may have a relatively small width when compared to the built-in tooth base 441 . The built-in tooth body 442 may support the coil.

The built-in tooth head 443 may be formed at the end of the built-in tooth body 442 . The assembled tooth head 443 may have a shape protruding from the end of the assembled tooth body 442 to both sides. The assembled tooth head 443 can prevent the coil from coming out.

The first thickness L1 from the stator core body 42 to the outer surface of the integral tooth base 431 is substantially equal to the second thickness L2 from the inner surface to the outer surface of the assembled tooth base 441. can be the same According to this structure, the outer surfaces of the integrated tooth base 431 and the assembled tooth base 441 may form a smooth curved shape.

5A is a plan view illustrating a state in which a coil is wound around a separated stator according to an exemplary embodiment, and FIG. 5B is a plan view illustrating an assembled state of the stator illustrated in FIG. 5A.

5A and 5B, the stator (eg, the stator 4 of FIG. 4A) includes a stator core body 52 (eg, the stator core body 42 of FIG. 4A), and three integral teeth 53 (eg, integral teeth 43 in FIG. 4A), three built-in teeth 54 (eg, built-up teeth 44 in FIG. 4A), a coil 59A, 59B) may be included.

The coils 59A and 59B may include a first coil 59A wound around integral teeth 53 and a second coil 59B wound around built-up teeth 54 . The stator may reduce the size of a dead zone provided in the stator by using the three integrated teeth 53 and the three assembled teeth 54 . A first coil 59A wound on an integral tooth body (e.g., integral tooth body 432 in FIG. 4A) and an assembled tooth body (e.g., assembled tooth body 442 in FIG. 4A) The first distance d1, which is the minimum distance between the wound second coil 59B, is defined as an integral tooth head (e.g., integral tooth head 433 in FIG. 4A) and an assembled tooth head (e.g., It may be smaller than the second distance d2, which is the minimum distance between the assembled tooth heads 434 of FIG. 4A.

The electric motor (eg, the electric motor 20 of FIG. 3) includes a stator (eg, the stator 22 of FIG. 3 and the stator 4 of FIG. 4A) and a rotor surrounding the stator (eg, the stator 22 of FIG. 3). , the rotor 24 of FIG. 3).

6A is a plan view illustrating a state in which the stator is separated according to an exemplary embodiment, and FIG. 6B is a plan view illustrating a state in which the stator illustrated in FIG. 6A is assembled.

6A and 6B, the stator includes a stator core body 62 (eg, the stator core body 42 of FIG. 4A) and three integral teeth 63 (eg, the stator core body 42 of FIG. 4A). integral teeth 43), and three build-up teeth 64 (eg, build-up teeth 44 in FIG. 4A). The build tooth 64 may include a build tooth base 641 , a build tooth body 642 , a build tooth head 643 and a build tooth protrusion 644 .

The assembled tooth protrusion 644 may protrude from the assembled tooth base 641 . The assembly tooth protrusion 644 may protrude from the assembly tooth base 641 in the opposite direction to the assembly tooth body 642 . The assembled teeth 644 may be inserted into the stator core body 62 . The assembled tooth protrusion 644 may include a shape that widens as it moves away from the assembled tooth base 641 . For example, the assembled tooth protrusion 644 may have a shape in which the width increases in the second arrow direction A2 as it goes in the first arrow direction A1.

According to various embodiments, the stator 4 includes a stator core body 42 having a ring shape and three integral teeth 43 connected to the stator core body and integrally formed with the stator core body. It may include a stator core 41, three assembly teeth 44 connected to the stator core body, and coils 59A and 59B wound around the three integral teeth and the three assembly teeth, respectively.

In various embodiments, based on the circumferential direction of the stator core body, the integral teeth 43 and the assembly teeth 44 may be alternately disposed.

In various embodiments, each of the assembly teeth 44 protrudes from an assembly tooth base 441 connected to the stator core body, an outer surface of the assembly tooth base, and supports the coil. A tooth body and an assembled tooth head provided at an end of the assembled tooth body and preventing the coil from coming off.

In various embodiments, the built-in tooth base 441 may be disposed between two of the three integral teeth.

In various embodiments, an inner surface of the assembled tooth base 441 may be provided in a state of surface contact with the stator core body.

In various embodiments, both side surfaces of the assembled tooth base 441 may be provided in a state of surface contact with the two integral teeth.

In various embodiments, the assembled tooth base 441 may be bonded to the stator core body and the two integral teeth.

In various embodiments, each of the assembly teeth 64 further includes an assembly tooth protrusion 644 protruding from the assembly tooth base in a direction opposite to the assembly tooth body and inserted into the stator core body. can include

In various embodiments, the assembled tooth protrusion 644 may include a shape in which the width increases as it moves away from the assembled tooth base.

In various embodiments, the prefabricated tooth base 441 may have a shape in which the width becomes narrower as it approaches the stator core body.

In various embodiments, each of the three integral teeth 43 may include an integral tooth base 431 protruding from an outer surface of the stator core body, protruding from an outer surface of the integral tooth base, and supporting the coil. and an integral tooth head 433 provided at an end of the integral tooth body and preventing the coil from coming off.

In various embodiments, a first distance (d1), which is the minimum distance between the coil wound on the assembled tooth body and the coil wound on the integral tooth body, is the minimum distance between the assembled tooth head and the integral tooth head. It may be smaller than the second distance d2.

In various embodiments, any one of the three integral teeth 43 and any one of the three assembling teeth 44 provided on the opposite side of any one of the integral teeth with respect to the stator core body Assembled teeth may have the same phase.

In various embodiments, based on a direction away from the center of the stator core body, a thickness of the assembled tooth base and a thickness of the integral tooth base may be the same as each other.

According to various embodiments, the electric motor 20 may include the stator 22 and a rotator 24 surrounding the stator and rotatable.

According to various embodiments, the stator 4 includes a stator core body 42 having a ring shape and three integral teeth 43 connected to the stator core body and integrally formed with the stator core body. A stator core 42, three assembled teeth 44 connected to the stator core body, and coils 59A and 59B wound around the three integral teeth and the three assembled teeth, respectively, wherein the stator Based on the circumferential direction of the core body, the integrated teeth and assembly teeth are alternately disposed, each of the assembly teeth is connected to the stator core body, and the width becomes narrower as it approaches the stator core body. An assembly type tooth base including a shape, an assembly type tooth body protruding from an outer surface of the assembly type tooth base and supporting the coil, and provided at an end of the assembly type tooth body to prevent the coil from coming off. It may include an assembly-type tooth head that does.

In various embodiments, the built-in tooth base 441 may be disposed between two of the three integral teeth.

In various embodiments, an inner surface of the assembled tooth base 441 may be provided in a state of surface contact with the stator core body.

In various embodiments, each of the three integral teeth 43 may include an integral tooth base 431 protruding from an outer surface of the stator core body, protruding from an outer surface of the integral tooth base, and supporting the coil. and an integral tooth head 433 provided at an end of the integral tooth body and preventing the coil from coming off.

In various embodiments, any one of the three integral teeth and any one of the three assembling teeth provided on the opposite side of the one of the integral teeth with respect to the stator core body of the three assembling teeth are on the same phase may have a phase.

Stator: 4
Stator core: 41
Stator core body: 42
Integral Chi: 43
Assembled Chi: 44

Claims (20)

a stator core including a stator core body having a ring shape and three integral teeth connected to the stator core body and integrally formed with the stator core body;
three assembled teeth connected to the stator core body; and
A stator core including three integral teeth and a stator including three assembly teeth, including a coil wound around each of the three integral teeth and the three assembly teeth.
According to claim 1,
Based on the circumferential direction of the stator core body, the integral teeth and the assembly teeth are disposed alternately with each other, the stator core including three integral teeth and the stator including three assembly teeth.
According to claim 2,
Each of the assembly type teeth,
an assembled tooth base connected to the stator core body;
an assembly type tooth body protruding from an outer surface of the assembly type tooth base and supporting the coil; and
A stator core including three integral teeth and a stator including three assembly teeth, including an assembly tooth head provided at an end of the assembly tooth body and preventing separation of the coil.
According to claim 3,
The stator core comprising three integral teeth and the stator comprising three integral teeth, wherein the assembly tooth base is disposed between two of the three integral teeth.
According to claim 4,
The stator core including three integrated teeth and the stator including three assembly teeth, wherein the inner surface of the assembly tooth base is provided in surface contact with the stator core body.
According to claim 4,
Both side surfaces of the assembly tooth base are provided in surface contact with the two integral teeth, the stator core including three integral teeth and the stator including three assembly teeth.
According to claim 4,
wherein the assembly tooth base is bonded to the stator core body and the two integral teeth, a stator core comprising three integral teeth and a stator comprising three assembly teeth.
According to claim 4,
Each of the assembly type teeth,
A stator core including three integral teeth and three assembly teeth, further comprising an assembly tooth projection protruding from the assembly tooth base in a direction opposite to the assembly tooth body and inserted into the stator core body; Stator including.
According to claim 8,
The stator core including three integral teeth and the stator including three assembly teeth, wherein the assembly tooth protrusion includes a shape that widens as it moves away from the assembly tooth base.
According to claim 3,
The assembling tooth base includes a stator core including three integral teeth and a stator including three assembly teeth, including a shape in which the width narrows as it approaches the stator core body.
According to claim 3,
Each of the three integral teeth,
an integrated tooth base protruding from an outer surface of the stator core body;
an integral tooth body protruding from an outer surface of the integral tooth base and supporting the coil; and
A stator core including three integral teeth and a stator including three assembly teeth, including an integral tooth head provided at an end of the integral tooth body and preventing separation of the coil.
According to claim 11,
A first distance, which is the minimum distance between the coil wound around the assembled tooth body and the coil wound around the integral tooth body, is smaller than the second distance, which is the minimum distance between the assembled tooth head and the integral tooth head; A stator core comprising teeth and a stator comprising three assembling teeth.
According to claim 11,
Any one of the three integral teeth and any one of the three assembling teeth provided on the opposite side of the one of the integral teeth with respect to the stator core body of the three assembling teeth have the same phase , a stator core including three integral teeth and a stator including three assembling teeth.
According to claim 11,
In a direction away from the center of the stator core body, the stator core including three integral teeth and the stator core including three assembly teeth, the thickness of the assembled tooth base and the integrated tooth base being the same as each other, .
stator according to claim 1; and
An electric motor comprising a rotatable rotor surrounding the stator.
a stator core including a stator core body having a ring shape and three integral teeth connected to the stator core body and integrally formed with the stator core body;
three assembled teeth connected to the stator core body; and
A coil wound around each of the three integral teeth and the three assembled teeth,
Based on the circumferential direction of the stator core body, the integrated teeth and assembly teeth are alternately arranged with each other,
Each of the assembly type teeth,
an assembled tooth base connected to the stator core body and having a shape in which a width becomes narrower as it approaches the stator core body;
an assembly type tooth body protruding from an outer surface of the assembly type tooth base and supporting the coil; and
A stator core including three integral teeth and a stator including three assembly teeth, including an assembly tooth head provided at an end of the assembly tooth body and preventing separation of the coil.
17. The method of claim 16,
The stator core comprising three integral teeth and the stator comprising three integral teeth, wherein the assembly tooth base is disposed between two of the three integral teeth.
18. The method of claim 17,
The stator core including three integrated teeth and the stator including three assembly teeth, wherein the inner surface of the assembly tooth base is provided in surface contact with the stator core body.
17. The method of claim 16,
Each of the three integral teeth,
an integrated tooth base protruding from an outer surface of the stator core body;
an integral tooth body protruding from an outer surface of the integral tooth base and supporting the coil; and
A stator core including three integral teeth and a stator including three assembly teeth, including an integral tooth head provided at an end of the integral tooth body and preventing separation of the coil.
17. The method of claim 16,
Any one of the three integral teeth and any one of the three assembling teeth provided on the opposite side of the one of the integral teeth with respect to the stator core body of the three assembling teeth have the same phase , a stator core including three integral teeth and a stator including three assembling teeth.

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