KR20190093457A - Stator for motor having split core with vibration and noise reduction structure - Google Patents

Abstract

The present invention relates to a division core typed motor stator with a vibration and noise reduction structure. According to an embodiment of the present invention, the division core typed motor stator is formed by stacking and coupling a plurality of division cores including: a yoke unit formed through an external end unit; a teeth unit extending from the yoke unit toward an inner center direction; and a pole unit protruding in a circular arc shape through an inner end unit of the teeth unit. The plurality of division cores include: an open slot typed core in which a gap between the pole units adjacent to each other are opened in a predetermined shape and size to form a slop open unit when the yoke unit is annularly rolled to form a stator core; and a close slot typed core vertically stacked with the open slot typed core and shielding the gap between the pole units adjacent to each other when the yoke unit is annularly rolled to form the stator core. According to the present invention, efficiency of a motor can be increased, vibration and noise can be reduced, and assembly hardness can be maintained, thereby increasing quality and reliability of the motor.

Description

Split-core motor stator with vibration and noise reduction structure {STATOR FOR MOTOR HAVING SPLIT CORE WITH VIBRATION AND NOISE REDUCTION STRUCTURE}

The present invention relates to a split core motor stator having a vibration and noise reduction structure.

In order to improve the efficiency of the motor, there are many methods such as magnetic circuit design and construction method.

In the related art, a core (hereinafter referred to as a barrel core) in which a stator portion of a motor is integrated is used. In this case, the reliability of the manufacturing process has an advantage, but on the other hand, there is a problem in that the area of the effective slot in which the winding of the motor is wound is limited due to securing a space of a nozzle for winding. This resulted in limiting the improvement of the efficiency of the motor.

As a solution to this conventional problem, a core (hereinafter, referred to as a split core ') that divides and stirs the stator of the motor and is assembled is used.

As a prior document related to the present invention, Korean Patent Publication No. 10-2005-0048962 (2005.05.25, publication date) (hereinafter referred to as "prior document 1") discloses a split core coupling structure of an electric motor. The split core coupling structure disclosed in the prior document 1 is configured to include a yoke portion connecting the two ends of the stator core in a circular arc shape, a tooth portion winding the winding coil, and a pole portion. However, this split core structure has a disadvantage in that it is not suitable for reducing the vibration and noise of the motor.

As a prior document related to the present invention, the Republic of Korea Patent Publication No. 10-2009-0077592 (2009.07.15, publication date) (hereinafter referred to as 'prior document 2') is disclosed as a split core type motor stator. The conventional split core motor stator according to the prior art 2 is shown through FIG. 1.

Referring to FIG. 1, the conventional motor stator 20 includes a stator core 22 to which a plurality of split cores 23 are coupled. The coil 30 is wound around the slot 26 formed in the stator core 22 with the insulator 28 interposed therebetween. The split core 23 includes an outer arc portion 24 and an inner arc portion 24 ′ having different radii. The inner arc portion 24 ′ and the outer arc portion 24 are connected to each other by the protrusion 25.

 According to such a structure, the inner arc portion 24 ′ and the outer arc portion 24 are in close contact with each other and do not flow relative to each other when the split core 23 is assembled.

Accordingly, shape deformation of the stator core 22 is not induced, and noise and vibration can be suppressed to some extent during the operation of the motor. However, according to the structure of the conventional motor stator, since the stator inner portion is formed of a closed slot structure, there is a problem that the amount of leakage of magnetic flux generated in the permanent magnet increases. As a result, the problem of increased leakage flux is a serious cause of deteriorating the efficiency of the motor.

An object of the present invention is to provide a split core type motor stator which can prevent the increase of leakage magnetic flux and improve the efficiency of the motor by forming the slot open part by applying the open slot and the closed slot together at the inside of the stator when the split core is applied. do.

An object of the present invention is to provide a split core type motor stator that can reduce the vibration and noise as well as improve the efficiency of the motor by presenting the optimal application ratio for the open slot and the closed slot inside the stator when applying the split core. do.

An object of the present invention is to provide a split core type motor stator that can secure structural rigidity in forming a slot opening by applying an open slot and a closed slot to the inside of the stator when applying the split core.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

According to an aspect of the present invention for achieving the above object, a slot of a predetermined size through the inside of the stator by applying an open slot type core with an inner side of the stator core and a closed slot type core with the inside shielded together A split core type motor stator having an open portion can be provided.

The split-core motor stator according to an embodiment of the present invention for this purpose, the yoke portion formed through the outer end, the tooth portion extending in the inner center direction from the yoke portion, and protrudes in an arc shape through the inner end of the tooth portion. It may be formed by stacking a plurality of split cores including a pole portion. In this case, when the plurality of split cores are rolled in an annular shape to form a stator core, an open slot type core in which a slot opening is formed by opening a predetermined shape and size between adjacent pole parts, and an up and down together with an open slot type core When stacked, the yoke portion is rolled up to form a stator core, and includes a closed slotted core that is shielded between the pole portions adjacent to each other, thereby preventing an increase in leakage flux and improving the efficiency of the motor.

According to another aspect of the present invention for achieving the above another object, a split core type motor in which an open slot type core and a closed slot type core are formed in an appropriate ratio so as to improve the efficiency of the motor and reduce vibration and noise. Stator can be provided.

The split-core motor stator according to another embodiment of the present invention for this purpose consists of a stack height ratio of the closed slotted core of 9.5 to 10.5% relative to the total stacking height of the stator core to prevent an increase in leakage magnetic flux. It is possible to reduce vibration and noise while improving efficiency.

According to another aspect of the present invention for achieving the another object, a split core type motor stator capable of maintaining rigidity in forming a slot opening by applying an open slot type core and a closed slot type core together inside the stator. Can be provided.

Split core type motor stator according to another embodiment of the present invention for this purpose may be arranged at least one closed slot-type core on the upper, lower ends, and an open slot core between them. At this time, the thickness of the closed slot-type core may be determined according to the size required to maintain the assembly rigidity of the split core type motor stator (eg, 1.0 ~ 1.5mm, etc.). Accordingly, by providing a slot open portion, it is possible to improve assembly quality while maintaining motor rigidity while improving motor efficiency.

According to the present invention, in forming a split core type motor stator by stacking a plurality of split cores up and down, a slot open portion may be formed inside the stator using an open slot type core and a closed slot type core. As a result, the leakage magnetic flux of the permanent magnet can be prevented from increasing, and as a result, the efficiency of the motor can be significantly improved.

In addition, according to the present invention, an optimal application height ratio (eg, 9.5 to 10.5%, etc.) for a closed slotted core that does not provide a slot opening may be provided relative to the overall height of the motor stator. Thereby, the vibration noise reduction effect can be improved while improving the efficiency of the motor.

Further, according to the present invention, at least one closed slotted core is disposed at the upper and lower ends of the stator, and an open slotted core is disposed therebetween, and the minimum thickness of the closed slotted core at this time (for example, 1.0 to 1.5 mm). And the like). As a result, the assembly stiffness can be maintained while improving the motor efficiency, thereby improving the quality and reliability of the motor.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a view schematically showing a conventional split core type motor stator.
2 is a diagram illustrating a split core type motor stator according to an exemplary embodiment of the present invention.
3 is a view schematically showing a closed slotted core according to an embodiment of the present invention.
4 is a view schematically showing an open slotted core according to an embodiment of the present invention.
Figure 5 is a view showing a slot opening formed in the inner portion of the split core type motor stator according to an embodiment of the present invention.
FIG. 6 is an enlarged view of area A of FIG. 5 and comparing the total height L of the split core type motor stator and the total stack heights T1, T2, and T3 of the closed slotted core according to an exemplary embodiment of the present disclosure. to be.
7 is a view showing a slot opening of the split core type motor stator according to another embodiment of the present invention.
8 is a graph showing that the motor efficiency, noise, stiffness is changed according to the ratio of the slot contact surface of the split core type motor stator according to the embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and like reference numerals designate like elements throughout the specification. In addition, some embodiments of the invention will be described in detail with reference to exemplary drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

In describing a component of the present invention, when a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to that other component. It is to be understood that other components may be "interposed" between each component, or that each component may be "connected", "coupled" or "connected" through other components.

In the related art, a core (hereinafter referred to as a barrel core) in which a stator portion of a motor is integrated is used. In this case, the reliability of the manufacturing process has an advantage, but on the other hand, the area of the effective slot in which the winding of the motor is wound is limited due to the securing of the space of the nozzle for winding. As a result, it became a cause to limit the improvement of motor efficiency.

As a method for improving the efficiency of the motor, a core structure in which the stator of the motor is divided and wound and then assembled is used. Hereinafter, such a core structure is called a split core, and a stator of a motor to which the split core is applied is referred to as a split core type motor stator.

2 is a diagram illustrating a split core type motor stator according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the split core motor stator 100 includes a plurality of split cores 110 and 130 having a yoke part, a tooth part, and a pole part.

The plurality of split cores 110 and 130 include a plurality of closed slotted cores 110 and a plurality of open slotted cores 130.

Each of the split cores 110 and 130 may be provided in the form of a thin plate, and may be stacked up and down to form a predetermined height. In addition, the stacked cores 110 and 130 coupled in this manner may be formed in a cylindrical shape in the stator 100 shown in FIG.

Specifically, each of the split cores (110, 130) has an arc-shaped cross-section, it can be rolled in the circumferential direction in the state of being laminated up and down to form a cylindrical shape of the stator 100 as a whole.

3 is a view schematically showing a closed slotted core according to an embodiment of the present invention, and FIG. 4 is a view schematically showing an open slotted core according to an embodiment of the present invention.

Referring to FIG. 3, the closed slotted core 110 includes a yoke portion 111, a tooth portion 113, and a pawl portion 115.

The yoke portion 111 may be formed through the outer end of the stator 100 (see FIG. 2) core. The yoke portion 111 may have an arc shape, and may be circumferential when several are connected along the edge.

The tooth portion 113 extends in the inner center direction from the yoke portion 111. The tooth portion 113 protrudes radially from the inner circumferential surface of the yoke portion 111 to allow the winding coil to be wound.

The pole portion 115 protrudes in an arc shape at the inner end of the tooth portion 113 and forms a polarity.

On the other hand, the arc length of the pawl portion 115 of the closed slot core 110 is S1, compared to S2 which is the arc length of the pawl portion 135 (see FIG. 3) of the open slotted core 130 (see FIG. 3) to be described later. It is formed long.

As shown in FIG. 2, the difference between the arc-shaped arc lengths S1 and S2 between the closed slotted core 110 and the open slotted core 130 (see FIG. 3) is shown. The slot opening 150 is formed only at the portion at which the 130 is laminated.

Referring to FIG. 4, the open slotted core 130 has a yoke portion 131 formed through the outer end in the same manner as the closed slotted core 110 (see FIG. 3) and the inside of the yoke portion 131. Teeth portion 133 and pole portion 135 extending to the.

However, the arc length of the pawl portion 135 of the open slotted core 130 is S2, which is the arc of the pawl portion 115 (see FIG. 3) of the closed slotted core 110 (see FIG. 3) as shown in FIG. 3. The length is shorter than that of S1 (see FIG. 3). The difference in length between S1 and S2 can be confirmed in detail with reference to FIG. 2.

As such, the open slotted core 130 has a predetermined shape and size between the pole portions 135 adjacent to each other when the yoke portion 131 is rolled up to form a cylindrical stator 100 as shown in FIG. 2. To form a slot opening 150 to be opened.

In contrast, the closed slot core 110 shown in FIG. 3 has a structure in which the pole portions 115 adjacent to each other are shielded when the yoke portion 111 is rolled in an annular form to form a stator core, and the pole portions 115 adjacent to each other. An open space is not formed between the).

Referring back to FIG. 2, in the split-core motor stator 100 according to an embodiment of the present invention, the closed slotted core 110 is provided at upper and lower ends of the stator 100 (ie, the stator core), respectively. Can be.

In addition, a plurality of open slotted cores 130 may be stacked and coupled upwardly and downwardly between closed slotted cores 110 provided at upper and lower ends of the stator 100.

Figure 5 is a view showing a slot opening formed in the inner portion of the split core type motor stator according to an embodiment of the present invention.

Referring to FIG. 5, the closed slotted core 110 is disposed at the top, bottom and height centers of the stator 100, respectively.

The open slotted core 130 is stacked and coupled between the upper end of the stator 100, the center of the height of the stator 100, and the closed slotted core 110 provided at each of the lower ends of the stator 100.

If only the open slotted core 130 is used, structural rigidity may be reduced when the split core type motor stator 100 is applied. This decrease in stiffness increases vibration and noise during operation of the motor.

Therefore, by arranging the closed slot type core 110 and the open slot type core 130 at an appropriate position and at an appropriate height, an effect of improving motor efficiency according to the split core method and reducing vibration noise when driving the motor is obtained. Can be.

As such, the slot opening 150 may include a closed slotted core 110 formed at an upper end of the stator 100, a closed slotted core 110 formed at a height center of the stator 100, and a stator 100. It may be formed between the closed slot-shaped core 110 formed in the lower end.

Meanwhile, the closed slotted core 110 may be formed to have an appropriate height ratio with respect to the overall height of the stator 100, which will be described with reference to FIG. 6.

FIG. 6 is an enlarged view of area A of FIG. 5 and comparing the total height L of the split core type motor stator and the total stack heights T1, T2, and T3 of the closed slotted core according to an exemplary embodiment of the present disclosure. to be.

Referring to FIG. 6, the sum (T1 + T2 + T3) of the total stack height of the closed slotted core 110, that is, the height at which the closed slotted core 110 is stacked and coupled, is the total height L of the stator 100. ), It is better to be formed in a ratio of 9.5 to 10.5%.

If the total stack height T1 + T2 + T3 of the closed slot core 110 exceeds 10.5% of the total height L of the stator core, the slot openings 150: 1501 and 1502 are reduced. Due to magnetic flux leakage, the effect of improving the efficiency of the motor may be insufficient. On the contrary, when the total stack height T1 + T2 + T3 of the closed slot core 110 is less than 9.5% of the total height L of the stator core, vibration and noise during operation of the motor increase due to insufficient rigidity. There may be a problem.

Therefore, the total stack height T1 + T2 + T3 of the closed slotted core 110 may be determined at a ratio of 9.5-10.5% of the total height L of the stator core.

In addition, the thickness (ie, sheet thickness) of each of the closed slotted cores 110 may be 1.0 to 1.5 mm. This is a thickness for securing the minimum assembly rigidity, if less than 1.0mm it is difficult to secure the required assembly rigidity. On the contrary, if the thickness exceeds 1.5 mm, the sheet thickness becomes too thick, and thus, it may be difficult to properly adjust the thickness of the closed slotted core 110 in preparation for the overall height of the stator.

Meanwhile, referring to FIG. 6, at least one closed slotted core 110 is disposed at the outer side, that is, the upper and lower ends of the stator 100, and has an open slot having a short arc length between the closed slotted cores 110. The mold core 130 is laminated and coupled up and down. Accordingly, two slot openings 150 (1501 and 1502) having vertical lengths corresponding to the stacking heights of the plurality of open slotted cores 130 are separated and formed up and down.

The longitudinal lengths of the slot openings 1501 and 1502 correspond to the stacking heights of the open slotted cores 130 formed between the closed slotted cores 110 and the horizontal lengths between the pole portions of the open slotted cores 130. It may be determined corresponding to the open distance.

As such, the slot opening part 150 may have a rectangular shape in which the vertical length in the vertical direction is longer than the horizontal length in the left and right directions.

7 is a view showing a slot opening of the split core type motor stator according to another embodiment of the present invention.

Referring to FIG. 7, the closed slotted core 110 is formed at a position that divides the entire height of the stator 100 into three, and the open slotted core 130 is stacked and coupled between the closed slotted cores 110. do. Accordingly, three slot openings 150: 1503, 1504, and 1505 are formed at positions of upper, middle, and lower positions through the stator 100.

The longitudinal lengths of the slot openings 1503, 1504, and 1505 correspond to the stacking heights of the open slotted cores 130 formed between the closed slotted cores 110 and the horizontal lengths of the pole portions of the open slotted cores 130. It can be determined corresponding to the open distance between them.

However, in this case, the open slotted core 130 is disposed at the outer side, that is, the upper and lower ends of the split core motor stator 100, and has a structure different from that of the embodiment described with reference to FIG. 6.

On the other hand, in the case of the embodiment shown in Figure 7, the total stack height (T4 + T5) of the closed slot-type core 110 is preferably formed in a ratio of 9.5 ~ 10.5% compared to the total height (L) of the stator 100. .

If the total stack height T4 + T5 of the closed slotted core 110 exceeds 10.5% of the total height L of the stator core, the slot openings 150: 1503, 1504, and 1505 are reduced. Due to magnetic flux leakage, the effect of improving the efficiency of the motor may be insufficient.

On the contrary, when the total stack height T4 + T5 of the closed slot core 110 is less than 9.5% of the total height L of the stator core, the rigidity and vibration of the motor may increase due to insufficient rigidity. There may be.

Therefore, the total stack height T4 + T5 of the closed slotted core 110 may be determined at a ratio of 9.5-10.5% of the total height L of the stator core.

8 is a graph showing that the motor efficiency, noise, stiffness is changed according to the ratio of the slot contact surface of the split core type motor stator according to the embodiment of the present invention.

Through the graph shown, the split core type motor stator (100, see FIG. 2) has a contact surface (%) of 9.5 to 10.5 (approximately 10%), which improves motor efficiency as an effect of slot opening, and is advantageous for securing rigidity. And it can be seen that the noise is reduced.

Here, the contact surface (%) may be understood as the ratio of the stacking height of the closed slotted cores 110 (see FIG. 2) to the overall height of the stator, and as a result, the ratio of the closed slotted cores is adjusted to secure motor efficiency and rigidity. The vibration and noise reduction effect can be obtained.

As described above, according to the configuration and operation of the present invention, in forming a motor stator by stacking a plurality of split cores, a slot opening is formed inside the stator by using an open slot type core and a closed slot type core together. can do. As a result, the leakage magnetic flux of the permanent magnet can be prevented from increasing, and as a result, the efficiency of the motor can be significantly improved.

Furthermore, by presenting the optimal height ratio (eg 9.5 ~ 10.5%) for closed slotted cores that do not provide slot openings compared to the overall height of the motor stator, the effect of reducing motor noise and reducing vibration noise Can improve.

Furthermore, by arranging closed slotted cores between the upper and lower ends of the stator core and open slotted cores therebetween, while maintaining the assembly rigidity by setting the thickness of the closed slotted core within the range of 1.0 to 1.5 mm. Can be. As a result, the quality and reliability of the motor can be improved.

As described above, the present invention has been described with reference to the drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that modifications can be made. In addition, even if the above described embodiments of the present invention while not explicitly described and described the operation and effect according to the configuration of the present invention, it is obvious that the effect predictable by the configuration is also to be recognized.

100: motor stator
110: closed slot core
111: York
113: Tisbu
115: Polbu
130: open slot core
131: York
133: Tisbu
135: pole
150 (1501, 1502, 1503, 1005, 1505): slot opening

Claims (10)

Yoke portion formed through the outer end;
A tooth portion extending from the yoke portion in an inner center direction; And
It is formed by stacking a plurality of split cores including; pole portion protruding in an arc shape through the inner end of the tooth portion,
The plurality of split cores,
When the yoke portion is rolled in an annular form to form the stator core, an open slotted core in which a slot opening is formed by opening between the pole portions adjacent to each other in a predetermined shape and size; And
A closed slotted core stacked up and down with the open slotted core, the closed slotted core being shielded between the adjacent pole portions when the yoke portion is rolled up to form the stator core;
Split core type motor stator having a vibration and noise reduction structure comprising a.
The method of claim 1,
The closed slotted core,
Characterized in that the upper and lower portions of the stator core, respectively
Split core motor stator with vibration and noise reduction structure.
The method of claim 2,
The open slotted core,
Characterized in that the stack is coupled between the closed slot type core provided on each of the upper and lower ends of the stator core
Split core motor stator with vibration and noise reduction structure.
The method of claim 2,
The closed slotted core,
At least one more center portion of the height of the stator core is provided
Split core motor stator with vibration and noise reduction structure.
The method of claim 4, wherein
The open slotted core,
Is laminated and coupled between the upper end of the stator core, the height center of the stator core, and the closed slot-type core provided in each of the lower end of the stator core
Split core motor stator with vibration and noise reduction structure.
The method of claim 1,
The closed slotted core,
At least one is provided at a position that divides the entire height of the stator core into three,
The open slotted core,
It is characterized in that the laminated coupling between the closed slot-type core
Split core motor stator with vibration and noise reduction structure.
The method of claim 1,
The pole portion arc length of the open slotted core is
Characterized in that it is formed short in a constant ratio compared to the arc length of the pole portion of the closed slot-type core
Split core motor stator with vibration and noise reduction structure.
The method of claim 7, wherein
The slot opening has a rectangular shape,
The rectangular slot opening portion,
When the stator core is formed, it has a horizontal length corresponding to the open distance between the pole portions of the open slotted core, and has a vertical length corresponding to the stacking height of the open slotted core.
Split core motor stator with vibration and noise reduction structure.
The method of claim 1,
Overall stacking height of the closed slotted core, characterized in that formed in a ratio of 9.5 ~ 10.5% of the total height of the stator core
Split core motor stator with vibration and noise reduction structure.
The method of claim 1,
The thickness of the closed slot type core, characterized in that 1.0 ~ 1.5mm
Split core motor stator with vibration and noise reduction structure.

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