KR102234439B1 - Stator and motor and compressor therewith and mehod for manufacturing stator - Google Patents

Abstract

Disclosed is a stator, a motor having the same, a compressor, and a method of manufacturing the stator. The disclosed invention is characterized in that the core is provided with a plurality of poles, and the pole shoe disposed between the rotor and the pole is detachably coupled to the pole.

Description

A stator and a method of manufacturing a motor, a compressor, and a stator having the same {STATOR AND MOTOR AND COMPRESSOR THEREWITH AND MEHOD FOR MANUFACTURING STATOR}

The present invention relates to a compressor, and more particularly, to a stator and a motor including the same, a compressor, and a method of manufacturing the stator.

The motor generates power while rotating in an interaction between a rotor having a plurality of magnets and an electromagnetic force generated by a coil wound on the stator.

Such a motor may include a shaft that is rotatably formed, a rotor coupled to the shaft, and a stator fixed inside the housing.

The stator is installed with a gap along the circumference of the rotor. A coil forming a rotating magnetic field is wound on the stator, and the coil induces an electrical interaction with the rotor to induce rotation of the rotor.

Further, in the stator provided in the motor, a core member made of a metal material is provided in a cylindrical shape. In this core member, a plurality of poles are formed to protrude toward the inside. And by winding the coils on each pole formed as described above, the stator can be installed.

In recent years, as the motor is miniaturized, the stator core is also required to be miniaturized and lightweight, and the stator core is often formed in a form in which thin metal plates are stacked to a predetermined thickness rather than a case where the stator core is formed as a single body.

As another example, a stator core in which an approximately "T"-shaped divided core having one pole is assembled into a cylindrical shape is also commonly used. However, in the case of a stator having a stator core having such a structure, not only the durability is weak, but also there is a disadvantage in that the manufacturing efficiency is deteriorated because the coil must be wound on one pole separately during the winding operation.

Meanwhile, in the motor, magnetic flux generated by a magnet installed in the rotor is linked to the stator, and an induced current is formed in the coil included in the stator by an electromagnetic induction action, and accordingly, the rotor rotates. In such a motor, cogging torque can be a problem at initial start-up.

The cogging torque is a non-uniform torque in the motor, and is a force in the tangential direction to move to a position where the magnetic energy of the motor is minimum. The cogging torque is generated by the interaction between the magnet of the rotor and the slot of the stator. This cogging torque is the main cause of vibration generated during the initial start of the motor.

There are various ways to solve this noise/vibration, but one of the most obvious solutions is to give a skew to the rotor or stator.

When the stator core is formed in a form in which thin metal plates are stacked to a predetermined thickness, skew may be applied to the stator by stacking the metal plates so that each pole is slightly distorted.

When the stator core is formed in a form in which the divided core is assembled in a cylindrical shape, the skew may be applied to the stator by applying the skew to the poles of each divided core.

In a structure in which thin metal plates are stacked to have a predetermined thickness and skew the stator in which the stator core is formed, leakage may occur between each metal plate of the core. In addition, in the structure in which the skew is applied to the stator as described above, since the dot ratio of the coil is inevitably reduced, there may be a problem that the output of the motor is reduced compared to the same volume. In addition, since the pole shape in each metal plate has already been determined, it is difficult to apply various types of skew to the stator.

In addition, even if the stator core is formed of one body, this structure also has a problem in that the dot ratio of the coil is reduced and that it is difficult to apply various types of skew to the stator.

An object of the present invention is to provide a stator having an improved structure so that skew can be easily applied to the stator while maintaining the rigidity of the stator, and a motor and a method of manufacturing the stator having the same.

Another object of the present invention is to provide a stator capable of providing an improved output, a motor including the same, and a method of manufacturing the stator.

Another object of the present invention is to provide a stator capable of applying various types of skew, a motor including the same, and a method of manufacturing the stator.

A stator according to an embodiment of the present invention for achieving the above object is characterized in that a plurality of poles are provided in a core, and a pole shoe disposed between the rotor and the poles is detachably coupled to the poles.

In addition, another aspect of the present invention is characterized in that the skew is applied to the pole shoe that is provided separately from the pole and is coupled to the pole.

With this configuration, the skew of the stator can be easily applied while maintaining the stiffness of the stator, and the dot ratio of the coil may not be reduced even when the skew is applied to the stator.

In addition, another aspect of the present invention is characterized in that the pole shoe is molded by a powder metallurgy method.

With this configuration, it is possible to provide an effect of enabling the stator to be easily manufactured and applied to the stator in various forms of skew.

A stator according to an aspect of the present invention includes: a yoke formed in a ring shape, and a core including a plurality of poles protruding from the yoke; And a pole shoe disposed between the rotor and the pole and detachably coupled to the pole.

In addition, the pole shoe includes a pole shoe body portion, and a first coupling portion provided on the pole shoe body portion, and the pole is provided on a pole body portion protruding from the yoke, and the pole body portion, and the first coupling portion and It is preferable to include a second coupling portion to be fitted.

In addition, the first coupling portion is formed to protrude from the pole shoe body portion, the second coupling portion is formed to be concave in the pole body portion in a shape corresponding to the shape of the first coupling portion, and the first coupling portion It is preferable that the first coupling portion and the second coupling portion are fitted by being inserted into the second coupling portion.

In addition, it is preferable that the first coupling portion is formed to protrude from the pole shoe body in a "T" shape, and the second coupling portion is formed concave in the pole body in a "T" shape.

In addition, it is preferable that a plurality of cores are stacked in the thickness direction of the core to form one core assembly, and the pawl shoe is provided with a thickness corresponding to the total thickness of the core assembly.

In addition, a plurality of the cores are stacked so that the positions of the poles and the second coupling portions provided in each of the cores coincide in the thickness direction of the core, and the first coupling portion has a thickness corresponding to the total thickness of the core assembly. It is preferably provided with a fitting coupling with the second coupling portion.

In addition, the pole shoe is preferably formed in a shape including a skew shape.

In addition, the pole shoe includes a pole shoe body portion including a surface facing the rotor, and a first coupling portion provided on the pole shoe body, wherein the pole is a pole body portion protruding from the yoke, and the pole body Includes a second coupling portion provided in the portion and fitted with the first coupling portion, and the pole body portion, the first coupling portion, and the second coupling portion are provided in a shape extending in a straight line along the thickness direction of the core. It is preferable that the pole shoe body portion is provided in a form in which a surface facing the rotor is formed in a skew shape.

In addition, it is preferable that a plurality of cores are stacked in the thickness direction of the core to form one core assembly, and the pawl shoe is formed to a thickness corresponding to the total thickness of the core assembly.

In addition, the pole shoe is preferably formed by compression molding and then sintering the metal powder.

In addition, a motor according to another aspect of the present invention includes: a yoke formed in a ring shape, and a core including a plurality of pawls protruding from the yoke; And a stator disposed between the rotor and the pole and having a pole shoe detachably coupled to the pole.

In addition, a method of manufacturing a stator according to another aspect of the present invention includes: manufacturing a core including a yoke formed in a ring shape and a plurality of pawls protruding from the yoke; Forming a pole shoe; And coupling the pawl shoe to the pawl so that the pawl shoe is disposed between the rotor and the pawl.

In addition, the present invention further includes the step of manufacturing a core assembly by stacking a plurality of the cores in the thickness direction of the core, and the pole shoe is preferably formed to have a thickness corresponding to the total thickness of the core assembly.

In addition, the pole shoe is preferably molded into a shape including a skew shape.

In addition, in the step of forming the pole shoe, it is preferable to compress the metal powder into the pole shoe shape and then sinter it.

According to the stator of the present invention, a motor including the same, and a method of manufacturing the stator, it is possible to provide an effect of facilitating application of the skew to the stator while maintaining the rigidity of the stator.

In addition, the present invention can provide an improved output by preventing the drop ratio of the coil from being reduced while the skew is applied to the stator.

In addition, the present invention can provide an effect of making it possible to apply various types of skew to the stator while it is easy to manufacture the stator.

1 is a cross-sectional view schematically showing the configuration of a compressor according to an embodiment of the present invention.
2 is a perspective view showing a stator according to an embodiment of the present invention.
3 is an enlarged view showing an enlarged portion "II" shown in FIG. 1.
4 is a plan view showing a part of the stator shown in FIG. 3.
5 is a flowchart showing a manufacturing process of a stator according to an embodiment of the present invention.
6 to 8 are views showing a manufacturing process of a stator according to an embodiment of the present invention.
9 is a perspective view showing a first modification of the pole shoe.
10 is a front view showing the shape of the pawl shoe shown in FIG. 9.
11 is a perspective view showing a second modification of the pole shoe.
12 is a front view showing the shape of the pawl shoe shown in FIG. 11.
13 is a perspective view showing a third modified example of the pole shoe.
14 is a front view showing the shape of the pawl shoe shown in FIG. 13.

Hereinafter, an embodiment of a stator according to the present invention, a motor including the same, a compressor, and a method of manufacturing the stator will be described with reference to the accompanying drawings. For convenience of description, thicknesses of lines or sizes of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

[Overall structure of compressor]

1 is a cross-sectional view schematically showing the configuration of a compressor according to an embodiment of the present invention.

Referring to FIG. 1, a compressor 300 according to an embodiment of the present invention may include a housing 310, a motor part, a compression part, and an inverter part.

The housing 310 forms the exterior of the compressor 300 according to the present embodiment. Inside the housing 310, an internal space for accommodating various components constituting the scroll compressor 300 is formed.

In this embodiment, the housing 310 is illustrated as being formed in an approximately cylindrical shape. A cylindrical inner space may be formed inside the housing 310. The internal space of the housing 310 may be divided into a motor part, which is a space in which the motor 330 is installed, and a compression part, which is a space in which the refrigerant is compressed.

The motor 330 is accommodated in an inner space of the housing 310, more specifically, a motor unit. The motor 330 may include a stator 1 and a rotor 2. Further, as the motor 330, a constant speed motor having the same rotational speed of the rotor 2 may be used, but an inverter motor capable of varying the rotational speed of the rotor 2 may be used.

In the compression unit, a configuration for compressing the refrigerant introduced into the housing 310 is disposed. In this embodiment, the compressor 300 is illustrated as being a scroll type compressor, and a fixed scroll 320 and an orbiting scroll 325 are provided in the compression unit.

Accordingly, the drive shaft 3 is connected to the rotor 2 of the motor 330, and the drive shaft 3 can be rotated by a rotational force generated by the motor 330. This drive shaft 3 may be combined with the orbiting scroll 325, and the orbiting scroll 325 may be combined with the drive shaft 3 to perform a orbiting motion. The orbiting scroll 325 may be engaged with the fixed scroll 320 disposed in the compression unit to form a compression chamber.

In addition, the compressor 300 may be provided with a suction port and a discharge port. The suction port is a passage formed to allow the refrigerant to flow into the housing 310, and the discharge port is a passage formed to discharge the refrigerant compressed inside the housing 310 to the outside of the housing 310. The discharge port may be disposed adjacent to the side of the compression unit, and the suction port may be disposed adjacent to the side of the inverter unit to be described later.

In the compressor 300 configured as described above, the refrigerant flows into the compressor 300 through a suction port. The refrigerant introduced in this way passes through the motor unit and flows into the compression unit. The refrigerant introduced into the compression unit is introduced into a compression chamber formed by interlocking the orbiting scroll and the fixed scroll to be compressed, and the high-pressure refrigerant compressed in the compression chamber is discharged to the outside of the scroll compressor 300 through a discharge port.

The inverter unit is disposed on one side of the housing 310, and an inverter 340 may be disposed on the inverter unit. The inverter 340 may control the motor 330 so that the number of rotations of the motor 330 can be adjusted, whereby the cooling efficiency of the compressor 300 can be variably adjusted.

[Overall structure of stator]

2 is a perspective view showing a stator according to an embodiment of the present invention.

1 and 2, a motor according to an embodiment of the present invention may include a stator 1 and a rotor 2. A coil is wound around the stator 1, and the rotor 2 can be rotated by an electromagnetic action with the stator 1.

The rotor 2 may include a conductor or a magnet. Such a rotor 2 can be rotated by an electromagnetic action with a coil wound around the stator 1. In addition, a drive shaft 3 (see FIG. 1) is connected to the center of the rotor 2, and the drive shaft 3 is coupled to the orbiting scroll 325 to rotate the orbiting scroll 325. Since the structure of the rotor 2 is a known configuration, a detailed description thereof will be omitted.

The stator 1 may be provided in a form surrounding the rotor 2 from the outside. This stator 1 may include a core assembly 10 and a coil.

The core assembly 10 may include a plurality of cores 100. That is, a plurality of cores 100 may be stacked in the thickness direction to form one core assembly 10.

Each core 100 may be provided with a plurality of poles 120. Each pole 120 may be wound with a coil, and the coil thus wound may interact with the rotor to rotate the rotor.

[Structure of stator]

FIG. 3 is an enlarged view showing an enlarged "± part of FIG. 2, and FIG. 4 is a plan view illustrating a part of the stator shown in FIG. 3.

2 to 4, the stator 1 may include a core assembly 10 and a pole shoe 20.

As an example, the core assembly 10 may be provided in a form in which a plurality of cores 100 are stacked in the thickness direction. The core assembly 10 may be formed as a single core 100 rather than a stacked form of a plurality of cores 100, but in this embodiment, the core assembly 10 is formed in a form in which a plurality of cores 100 are stacked. Is illustrated as being provided.

Each core 100 may include a yoke 110 and a pole 120. The yoke 110 is disposed on the outermost side of the stator 1 and may be formed in a ring shape. A rotor and a drive shaft 3 may be disposed inside the yoke 110.

And the pole 120 is formed to protrude from the yoke 110. As an example, the pole 120 is formed to protrude from the inner circumferential surface of the yoke 110 toward the center in the radial direction of the yoke 110. This pole 120 may be disposed between the yoke 110 and the rotor.

In the core 100, a plurality of poles 120 may be radially arranged. That is, a plurality of poles 120 may be disposed at predetermined intervals along the circumferential direction of the yoke 110. In each of the poles 120 arranged in this way, coils may be wound respectively.

And inside the core 100, the pole shoe 200 is arranged. The pole shoe 200 is disposed between the core 100 and the rotor, and may be provided separately from the core 100 to be coupled to the core 100. As an example, the pole shoe 200 is coupled to the inner end of the pole 120, it may be detachably coupled to the pole 120. The pole shoe 200 may be provided with a thickness corresponding to the total thickness of the core assembly 10.

The pole shoe 200 may be formed in a shape including a skew shape. The pole shoe 200 may be provided in a form in which a surface facing the rotor does not extend in a straight line along the thickness direction of the core 100 but extends obliquely. That is, the pole shoe 200 may be formed such that a surface facing the rotor extends in the thickness direction of the core 100, but extends obliquely along the circumferential direction of the core 100.

According to the stator 1 including the core 100 and the pole shoe 200 as described above, a skew shape is not applied to the pole 120, which is a part where the coil is wound, and the core 100 including the same. The skew shape is applied only to the pole shoe 200, which is a configuration that is not related to the winding.

In a structure in which thin metal plates are stacked to have a predetermined thickness and skew the stator in which the stator core is formed, leakage may occur between each metal plate of the core. In addition, in the structure in which the skew is applied to the stator as described above, since the dot ratio of the coil is inevitably reduced, there may be a problem in that the output of the motor is reduced relative to the same volume.

In contrast, in the stator 1 of the present embodiment, since the core 100 is stacked so that the skew is not applied to the core 100, the possibility of leakage between the stacked cores 100 may be reduced. In addition, in the stator 1 of the present embodiment, since skew is not applied to the pole 120 portion where the coil is wound, the dot ratio of the coil may also be increased compared to other types of steers to which the skew is applied. The effect of increasing the output of may also be provided.

[Coupling structure between pole and pole shoe]

According to this embodiment, the pole shoe 200 may include a pole shoe body part 210 and a first coupling part 220.

The pole shoe body portion 210 occupies most of the pole shoe body portion 200, and a skew is also applied to the pole shoe body portion 210. As an example, the inner surface of the pole shoe body 210 facing the rotor (hereinafter, referred to as "the inner surface of the pole shoe body") may be formed as a curved surface corresponding to the shape of the rotation region of the rotor. The pole shoe body part 210 is formed to have a wider width than the pole 120, and at least a portion of the pole shoe body part 210 may protrude outward in the width direction of the pole 120. In addition, a skew is applied to the pole shoe body part 210, and as an example, the pole shoe body part 210 may be formed in a shape in which the inner side thereof is skewed toward one side in the width direction as it goes from one side in the thickness direction to the other side.

Define the direction. The thickness direction indicates a direction in which the core 100 is stacked, and the width direction is defined as a direction parallel to the circumferential direction of the core 100. In addition, the radial direction is defined as a direction parallel to a straight line connecting the yoke 110 from the radial center of the core 100.

The first coupling part 220 is provided on the pole shoe body part 210, and is provided on the outer surface of the pole shoe body part 210 facing the pole 120. The first coupling part 220 is provided as a structure for achieving a coupling between the pole shoe 200 and the pole 120.

Meanwhile, the pole 120 may include a pole body part 121 and a second coupling part 123.

The pole body part 121 occupies most of the pole 120 and is formed to protrude from the yoke 110. The pole body portion 121 may be formed to protrude from the inner circumferential surface of the yoke 110 toward the center of the yoke 110, and a coil may be wound around the pole body portion 121.

The second coupling part 123 is provided on the pole body part 121, and is provided on the inner side of the pole body part 121 facing the pole shoe 200. This second coupling part 123 is provided as a structure for achieving a coupling between the pole shoe 200 and the pole 120.

According to this embodiment, a plurality of cores 100 are stacked to form a core assembly 10, and the pole shoe 200 may be coupled to each pole 120 of the core assembly 10 formed as described above. At this time, each of the cores 100 is stacked so that the positions of the poles 120 and the second coupling portions 123 provided in each of the cores 100 coincide in the thickness direction.

That is, when a plurality of cores 100 are stacked to form the core assembly 10, a plurality of poles 120 are disposed along the circumferential direction of the yoke 110 in the core assembly 10, and each pole 120 ) And the second coupling portion 123 formed therein may be provided in a shape extending in a straight line along the thickness direction.

According to the present embodiment, the first coupling portion 220 and the second coupling portion 123 are fitted to each other, so that the pole 120 and the pole shoe 200 may be coupled. In this embodiment, it is exemplified that the first coupling portion 220 is formed in a protruding shape, and the second coupling portion 123 is formed in a groove shape having a shape corresponding thereto.

According to this, the first coupling portion 220 may be formed in a protrusion shape protruding from the pole shoe body portion 210. The first coupling part 220 may be formed to protrude in the radial direction from the outer surface of the pole shoe body part 210.

As an example, the first coupling part 220 may be formed in a "T" shape from the outer surface of the pole shoe body part 210. For example, the first coupling part 220 includes a first protrusion protruding in the radial direction from the outer surface of the pole shoe body 210, and a second protrusion protruding in the width direction from the end of the first protrusion. It can be formed as

In addition, the second coupling portion 123 may be formed in a groove shape concavely formed in the pole body portion 121. The second coupling part 123 may be concavely formed on the inner side of the pole body part 121, and may be concave in a shape corresponding to the shape of the first coupling part 220. As an example, the second coupling part 123 may be concavely formed in a "T" shape corresponding to the shape of the first coupling part 220.

The second coupling part 123 may be formed to have a length corresponding to the total thickness of the core assembly 10. In addition, the first coupling part 220 may be provided to have a thickness corresponding to the total thickness of the core assembly 10 and may be fitted and coupled with the second coupling part 123. Accordingly, the pole shoe 200 is not coupled with only some of the cores 100 constituting the core assembly 10, but can be coupled with the entire core assembly 10, so that the pole shoe 200 has a strong bonding force to the core assembly 10. It will be able to be firmly combined.

In addition, according to the present embodiment, while the skew shape is applied to the pole shoe body part 210, the pole body part 121, the first coupling part 220, and the second coupling part 123 are in a straight line along the thickness direction. It is provided in an elongated shape.

Accordingly, it has been mentioned above that the possibility of leakage occurring between the stacked cores 100 is reduced, and the dot ratio of the coil may also be increased. In addition, since the first coupling portion 220 is inserted into the second coupling portion 123 in the thickness direction, a fitting coupling between the first coupling portion 220 and the second coupling portion 123 is possible, The advantage that the installation of the pole shoe 200 can be made more easily and quickly can also be provided.

[Method of manufacturing stator]

5 is a flowchart showing a manufacturing process of a stator according to an embodiment of the present invention, and FIGS. 6 to 8 are views showing a manufacturing process of a stator according to an embodiment of the present invention.

Hereinafter, a process of manufacturing the stator will be described with reference to FIGS. 5 to 8.

5 and 6, in order to manufacture a stator according to an embodiment of the present invention, the core 100 must first be manufactured (S10). The core 100 may be manufactured in a form in which a thin metal plate is processed so that the shape of the yoke 110 and the pole 120 can be represented.

Then, as shown in FIGS. 5 and 7, a core assembly 10 is manufactured by stacking a plurality of cores 100 manufactured as described above (S20). At this time, the plurality of cores 100 include poles 120 formed on the other cores 100 around the pole body portion 121 and the second coupling portion 123 of the poles 120 formed on each core 100. ) Of the pole body portion 121 and the second coupling portion 123 are stacked to coincide with each other in the position and thickness direction. Accordingly, the pole body portion 121 and the first coupling portion 220 provided in the core assembly 10 may be formed in a shape extending in a straight line along the thickness direction of the core 100.

In addition, separately from the manufacture of the core 100 and the core assembly 10, a pole shoe 200 (see FIG. 8) is molded (S30). Since the molding of the pole shoe 200 is performed separately from the manufacturing process of the core 100 and the core assembly 10, it may be made before the manufacture of the core 100 or after the manufacture of the core assembly 10.

The pole shoe 200 may be formed by a powder metallurgy method, that is, a method of compressing and sintering metal powder. The powder metallurgy method has the advantage that it is possible to manufacture a structure using a metallic material that is difficult to manufacture industrially using a melting method because the melting point is too high, and it is possible to manufacture structures of various shapes at low cost.

According to the present embodiment, a skew shape is applied to the pole shoe 200, and if such a skew shape is formed by machining, it will inevitably take a lot of time and cost for manufacturing. In consideration of this point, in this embodiment, the pole shoe 200 is formed by the powder metallurgy method, so that the pole shoe 200 to which the skew of various shapes is applied can be formed at low cost.

As described above, when the manufacturing of the core assembly 10 and the molding of the pole shoe 200 are completed, the pole shoe 200 is disposed between the rotor and the pole 120 as shown in FIGS. 5 and 8. 200) is coupled to the pole 120 (S40).

In the core assembly 10, a plurality of poles 120 are disposed along the circumferential direction of the core 100. The pole shoe 200 is provided in the same number as the number of the poles 120, and each pole shoe 200 may be coupled to each pole 120, respectively.

The coupling between the pole 120 and the pole shoe 200 may be achieved by a fitting coupling between the first coupling part 220 provided on the pole shoe 200 and the second coupling part 123 provided on the pole 120. The first coupling portion 220 and the second coupling portion 123 may be fitted in a manner in which the first coupling portion 220 is inserted into the second coupling portion 123 in the thickness direction.

In the present embodiment, it is exemplified that the first coupling portion 220 is formed in a protrusion shape and the second coupling portion 123 is formed in a groove shape, but the present invention is not limited thereto. As another example, a fitting coupling between the first coupling portion 220 and the second coupling portion 123 in a form in which the second coupling portion 123 formed in the shape of a protrusion is inserted into the first coupling portion 220 formed in a groove shape There may be several variations, such as this may be made.

[Operation and effect of the stator and the motor having the same]

The stator 1 having the above-described configuration and a motor having the same may provide the following effects.

First, the stator 1 and the motor having the same according to the present embodiment may provide an effect of facilitating application of the skew to the stator 1 while maintaining the rigidity of the stator 1.

According to the present embodiment, the basic skeleton of the stator 1 is made of a core assembly 10 formed by stacking a plurality of cores 100 formed in a form including all of a plurality of poles. The core assembly 10 having such a structure can maintain higher rigidity than a structure in which a plurality of divided cores each having one pole are assembled in a circumferential direction and assembled in a cylindrical shape.

In addition, in the present embodiment, the core assembly 10 and the pole shoe 200 molded separately from the core assembly 10 are coupled to the core assembly 10 having the above structure, and a skew may be applied to the pole shoe 200. That is, the pole shoe 200 to which the skew is applied is molded into a separate object from the core assembly 10, and the pole shoe 200 provided as a separate object is installed in the core assembly 10, so that the skew of the stator 1 can be applied. have. At this time, the pole shoe 200 is coupled to the inside of the stator 1, and the pole shoe 200 and the pole 120 are also coupled in the radial direction, so that the pole shoe 200 and the core assembly 10 are provided separately. Even if there is, it will be said that this is difficult to become a factor that lowers the rigidity of the stator 1.

Accordingly, while maintaining the stiffness of the core assembly 10 at a high level, it is possible to easily apply the skew of the stator 1.

Second, the stator 1 and the motor having the same according to the present embodiment can provide improved output by preventing a reduction in the dot ratio of the coil despite the structure to which the skew is applied.

According to the present embodiment, the skew is applied only to the pole shoe 200 portion, which is less related to the coil winding, and the skew is not applied to the pole 120, which is the portion where the coil is wound. Accordingly, although the skew shape for suppressing the occurrence of cogging torque and torque ripple is applied to the stator 1, the dot ratio of the coil is not reduced, so that the motor can provide more improved output.

Third, the stator 1 and the motor having the same according to the present embodiment can provide an effect of enabling various types of skew applications while being easy to manufacture.

According to the present embodiment, the pole shoe 200, which is a part for imparting skew to the stator 1, is provided separately from the core 100, and the pole shoe 200 is a powder which is a method of compressing and sintering metal powder. It can be molded by metallurgical methods. Accordingly, the pole shoe 200 may be formed at low cost, as well as various shapes. Below, a modified embodiment of the pole shoe 200 formed in various shapes is illustrated.

9 is a perspective view showing a first modification of the pole shoe, and FIG. 10 is a front view showing the shape of the pole shoe shown in FIG. 9. In addition, FIG. 11 is a perspective view showing a second modified example of the pawl shoe, and FIG. 12 is a front view showing the shape of the pawl shoe shown in FIG. 11. In addition, FIG. 13 is a perspective view showing a third modified example of the pawl shoe, and FIG. 14 is a front view showing the shape of the pawl shoe shown in FIG. 13.

9, the pole shoe 300 may be provided in a form including a first pole shoe 310 and a second pole shoe 350.

The first pole shoe 310 may be provided in a form in which two types of inner side surfaces 311 and 315 formed with different widths are disposed to cross each other along the thickness direction. And the second pole shoe 350, like the first pole shoe 310, two types of inner surfaces 311 and 315 are disposed to intersect along the thickness direction. The first pole shoe 310 and the second pole shoe 350 are disposed to cross each other along the circumferential direction of the core 100. At this time, the first pole shoe 200 and the second pole shoe 200 may be formed so that the two types of inner side surfaces 311 and 315 are arranged opposite to each other.

11 and 12, the pole shoe 400 may be provided in a shape including an inner side surface of an approximately parallelogram shape. 12 and 13, the pole shoe 500 includes a first pole shoe 510 having a trapezoid shape and a second pole shoe 550 having a trapezoid shape in which the first pole shoe 510 is vertically inverted. It can also be provided.

In addition to this, the pole shoe can be molded into various shapes. According to the present embodiment, since the pole shoe is formed as a separate material from the core, only the shape of the pole shoe can be separately changed and applied to the stator as necessary, and thus various types of skew can be applied to the stator.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is only illustrative, and those of ordinary skill in the field to which the technology pertains, various modifications and other equivalent embodiments are possible. I will understand. Therefore, the true technical protection scope of the present invention should be determined by the following claims.

1: stator
2: rotor
10: core assembly
100: core
110: York
120: Paul
121: pole body
123: second coupling portion
200: Paul Shoe
210: Pole shoe body
220: first coupling part
300: compressor
310: housing
320: fixed scroll
325: orbiting scroll
330: motor
340: inverter

Claims (16)

A core including a yoke formed in a ring shape, and a plurality of pawls protruding from the yoke; And
The metal powder is formed by compression molding and then sintering, and is disposed between the rotor and the pole, and includes a pole shoe detachably coupled to the pole,
A plurality of cores are stacked in the thickness direction of the core to form one core assembly,
The pole shoe is molded to a thickness corresponding to the total thickness of the core assembly, and is formed in a shape including a skew shape,
The pole shoe includes a pole shoe body portion including a surface facing the rotor, and a first coupling portion provided on the pole shoe body portion,
The pole includes a pole body portion protruding from the yoke, and a second coupling portion provided on the pole body portion and fitted with the first coupling portion,
The first coupling portion is formed to protrude from the pole shoe body portion,
The second coupling portion is formed to be concave in the pole body in a shape corresponding to the shape of the first coupling portion,
The pole body portion, the first coupling portion, and the second coupling portion are provided in a shape extending in a straight line along the thickness direction of the core,
The pole shoe body portion is a stator provided in a form in which a surface facing the rotor is formed in a skew shape.
The method of claim 1,
The first coupling portion is formed to protrude from the pole shoe body in a "T" shape,
The second coupling part is a stator that is concavely formed in a "T" shape in the pole body.
A motor comprising the stator of claim 1 or 2.
A compressor comprising the motor of claim 1.
As a method of manufacturing a stator for manufacturing the stator of claim 1 or 2,
Manufacturing a core including a yoke formed in a ring shape and a plurality of pawls protruding from the yoke;
Forming a pole shoe;
A method of manufacturing a stator comprising: coupling the pawl shoe to the pawl so that the pawl shoe is disposed between the rotor and the pawl.
The method of claim 5,
Further comprising the step of manufacturing a core assembly by stacking a plurality of the cores in the thickness direction of the core,
The pole shoe is a method of manufacturing a stator that is formed to a thickness corresponding to the total thickness of the core assembly.
The method of claim 6,
In the forming of the pole shoe, a method of manufacturing a stator in which metal powder is compression-molded into the pole shoe shape and then sintered. delete delete delete delete delete delete delete delete delete

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