KR20210009827A - Motor - Google Patents

Abstract

The present invention provides a motor with an improved structure of a bus bar and an insulator, which can solve spatial constraints caused by miniaturization of the motor. According to the present invention, in the motor comprising a stator and a rotor, the stator includes a stator core forming a back yoke, teeth extending in a radial direction of the back yoke, a coil, and a lower insulator module coupled to a lower portion of the stator core. The lower insulator module includes a middle terminal unit connected to a neutral point of the coil, and a lower insulator insulating the neutral terminal. And a hole is provided in the neutral terminal unit to disclose a structure in which a neutral point lead wire of the coil is inserted into the hole.

Description

Motor {MOTOR}

Various embodiments of the present invention relate to a motor having an improved motor insulator structure.

A general motor is a device that implements a driving force by the interaction of a stator and a rotor, and the structures of the stator and the rotor are basically the same.

However, the types of motors are divided according to the principle in which the rotor rotates due to the interaction between the stator and the rotor. In addition, the type of motor is also divided according to the type or phase of power applied to the stator coil. In addition, the types of motors are also classified according to how the stator coil is wound. For example, there are a DC type variable voltage motor and an AC type three-phase induction motor.

The general structure of the motor is provided with a shaft forming a rotating shaft, a rotor coupled to the shaft, and a stator fixed inside the housing, and the stators are installed at predetermined intervals along the circumference of the rotor.

In addition, a tooth is provided in the stator, and a coil forming a rotating magnetic field is wound on the tooth to induce electrical interaction with the rotor to induce rotation of the rotor.

The coil is divided into concentrated winding and distributed winding according to the winding method, and the concentrated winding is a winding method in which the coil is concentrated in one slot, and the distributed winding is divided into two or more slots. It is a winding method.

In the case of concentrated zone, copper wire (Copper loss) can be reduced by reducing the amount of winding compared to the distribution zone, but the change in magnetic flux density is large because the coil is excessively concentrated in the slot, and the core loss (or iron loss) Power loss increases. For this reason, coils wound in a concentrated winding method are generally used in small motors.

In recent years, motors used in various home appliances (eg, hair dryers, vacuum cleaners, etc.) are being developed to improve insulation performance and space constraints caused by demands for miniaturization and performance improvement.

In order to improve the performance of the motor, it is necessary to increase the number of turns of the coil in the winding space or increase the diameter of the coil. The size of the winding space formed between the teeth of the stator is limited. If the size is reduced, the insulation of the coil is not secured, which may adversely affect the performance of the motor.

Patent Document 1 (10-2015-0031634, published on March 25, 2015) simplifies the structure of the insulator by allowing the central axes of the virtual circles extending the inner peripheral surface of the terminal of the same shape to be disposed differently from each other, and Patent Document 2 (10 -2017-0052986, published on May 15, 2017) discloses a structure in which a fixing part protruding from a bus bar is inserted into a slot formed in an insulator to couple a bus bar and a stator, and Patent Document 3 (10-2016-0139824, published on December 7, 2016) ) Discloses a structure in which the terminal structure of the busbar is improved and the terminal is fitted to the upper surface of the stator in an annular structure, and Patent Document 4 (10-2016-0030924, published on March 21, 2016) is an input/output terminal of a busbar. It discloses a structure in which the structure is arranged to intersect vertically on the outer circumference.

However, the busbar and insulator structure applied to the patent documents requires a large space in the radial direction because a plurality of busbars are located in the outer diameter inner direction of the motor and the lead wire is wound around the insulator.

In particular, when the terminals are located on the same plane with the structure as in Patent Document 1, the utilization of the space increases, but in order to secure the insulation between the terminals, a large space in the radial direction is required as described above, and a space in the radial direction is required. If reduced, it is difficult to secure insulation.

Therefore, there is a need for structural improvement that can secure the insulation performance while miniaturizing the motor.

Patent Document 1: 10-2015-0031634 (published on March 25, 2015) Patent Document 2: 10-2017-0052986 (published on May 15, 2017) Patent Document 3: 10-2016-0139824 (published on December 7, 2016) Patent Document 4: 10-2016-0030924 (published on March 21, 2016)

Accordingly, one of the various problems of the present invention is to provide a motor having an improved structure of a bus bar and an insulator capable of solving the spatial constraint caused by miniaturization of the motor.

One of the various problems of the present invention is to provide a motor having an improved structure of a busbar and an insulator capable of miniaturizing the motor and securing insulation performance.

One of the various problems of the present invention is to provide a motor to which a tooth split core and concentrated winding are applied to ensure the performance and miniaturization of an ultra-high speed three-phase motor.

One of the various problems of the present invention is to provide a motor capable of performing wiring of U, V, W and midline point leader lines without being limited in space of the outer diameter of the stator and the radial direction of the back yoke.

One of the various problems of the present invention is to provide a motor with an improved insulator structure so as to secure the insulation distance of U, V, W and midline leader lines without being limited in the radial direction of the back yoke. I want to.

One of the various problems of the present invention is to provide a motor in which a busbar and an insulator structure can be coupled to a stator core within a limited outer diameter of a stator for miniaturization of the motor.

One of the various problems of the present invention is to provide a motor having a structure capable of connecting a leader line by axially coupling a tooth split core to a stator core.

One of the various problems of the present invention is that the three-phase power lead wire of the coil can be wired without using the radial direction of the back yoke, and the neutral point lead wire of the coil is drawn straight to the bottom of the motor and connected to the inside of the outer diameter of the stator. Intends to provide a motor with a structure in which the lead wire of the coil can be connected.

An exemplary embodiment of the present invention for solving various problems of the present invention provides a motor capable of performing the connection of the neutral point lead wire by straightly drawing out the neutral point lead wire of the coil and inserting it into the neutral guide insulator.

An exemplary embodiment of the present invention provides a motor that can be used as a neutral wire by finishing the winding from the inside of the motor to the outside when winding for processing the U, V, W lead wires and the neutral wire, and the inner winding of the motor is straightened to the bottom of the motor. do.

An exemplary embodiment of the present invention provides a motor in which a neutral wire is wired through a connection ring at the bottom of the motor and a ring type guide insulator to insulate a stator core and a shaft.

An exemplary embodiment of the present invention provides a motor in which the insulator is provided in the axial direction of the motor and the inner space of the stator without being limited to the outer diameter of the stator and the thickness of the back yoke.

An exemplary embodiment of the present invention is a motor including a stator and a rotor provided to rotate with respect to the stator, wherein the stator includes a stator core forming a back yoke and a tooth and a coil extending in a radial direction of the back yoke And a lower insulator module coupled to a lower portion of the stator core, wherein the lower insulator module includes a neutral terminal unit connected to a neutral point of the coil and a lower insulator provided surrounding at least a portion of an outer peripheral surface of the neutral terminal unit. And, the neutral terminal unit provides a motor, characterized in that it comprises a hole into which the neutral point lead line of the coil is inserted.

Preferably, the lower insulator surrounds the hole and may have a guide part for guiding the insertion of the neutral point leader line, and the cross section of the guide part has a width of a cross section smaller along the traveling direction in which the neutral point lead line is inserted, At least a part of the width of the cross section of the guide part may match the diameter of the hole.

Meanwhile, the neutral terminal unit may include a neutral terminal protruding in a radial direction of the back yoke and connected to the neutral point of the coil, and a neutral connection member connecting the neutral terminal, and the lower insulator includes the neutral terminal And a second insulator that surrounds and has a hollow shape, surrounds an outer circumferential surface of the neutral connection member, and forms a seating groove in which the neutral connection member is seated.

Meanwhile, the stator further includes an upper insulator module coupled to an upper portion of the stator core, and the upper insulator module includes a power terminal unit connected to a three-phase power lead line of the coil, and the power terminal unit and the stator core It may include an upper insulator to insulate between.

In addition, the power terminal unit is formed protruding toward the upper portion of the power terminal unit within the radius of the back yoke and connected to a power terminal connected to a three-phase power lead line of the coil and a three-phase power supply of the coil. It may include a connection terminal connected to any one of the phases.

The power terminal may include a fixing part forming a space for accommodating a three-phase power lead line of the coil, and an inclined part protruding from the fixing part to guide the coil to the fixing part, and the power terminal unit A may further include a power connection member having one side connected to the power terminal and the other side connected to the connection terminal, and the power connection member may form part of an upper surface of the upper insulator module.

Meanwhile, in an exemplary embodiment of the present invention, in a motor including a stator and a rotor provided to rotate with respect to the stator, the stator includes an inner circumferential surface forming a back yoke and a groove formed along the circumference of the inner circumferential surface. A tooth including a coupling portion coupled to the stator core and the groove, and a winding portion extending from the coupling portion toward a radially inner side of the back yoke, and a coil wound around the tooth and an upper insulator coupled to an upper portion of the stator core A module and a lower insulator module coupled to a lower portion of the stator core, wherein the upper insulator module is a power terminal unit connected to each phase of the three-phase power supply of the coil, and insulates between the power terminal unit and the stator core. Including an upper insulator, and the lower insulator module includes a neutral terminal unit connected to the neutral point of the coil, and a lower insulator provided to surround at least a portion of an outer peripheral surface of the neutral terminal unit, and a three-phase power supply of the coil A line is drawn from an upper portion of the tooth, and a neutral point lead line of the coil is drawn from a lower portion of the tooth and is connected to the power terminal unit and the neutral terminal unit, respectively.

Preferably, the three-phase power lead wire may be drawn outward in the radial direction of the back yoke to be connected to the power terminal, and the neutral point lead wire may be connected to the neutral terminal from the inside of the back yoke in the radial direction. .

Meanwhile, the neutral terminal unit includes a neutral terminal protruding toward the inside of the back yoke in a radial direction and connected to the neutral point of the coil, and a neutral connection member connecting the neutral terminal, wherein the neutral terminal includes the neutral point It may include a hole into which the leader line is inserted.

In addition, the lower insulator surrounds the neutral terminal and is provided in a hollow shape, and surrounds the outer circumferential surface of the first insulator and the neutral connection member, which is formed to have a diameter smaller than the diameter of the back yoke, and the neutral connection member is seated. It may include a second insulator forming a seating groove.

The first insulator may include a guide portion formed through the first insulator to guide insertion of the neutral point lead line, and the cross section of the guide portion has a width of a cross section along a traveling direction in which the neutral point lead line is inserted This may be small, and the guide portion may be provided to communicate with the hole.

Meanwhile, the neutral terminal may be formed at the same height in the lower insulator module.

Each of the features of the above-described embodiments may be implemented in combination in other embodiments unless contradictory or exclusive with other embodiments.

According to the present invention, the outer diameter of the stator can be reduced, and the radial thickness of the back yoke can be formed to be thin, and thus the motor can be reduced in size and weight.

In addition, it is possible to perform the connection of the three-phase power supply (U, V, W) and the neutral point lead wire without being limited to the radial thickness of the back yoke.

In addition, since the insulator module is coupled to the stator core in the axial direction, it is possible to miniaturize the motor by minimizing the thickness of the stator core in the radial direction.

In addition, since the insulation distance between the stator core and the bus bar (U, V, W lead wires) and the neutral wire connection ring is secured, it is possible to secure insulation strength.

In addition, for high speed and miniaturization of the motor, concentrated winding is applied to the tooth split core, and the tooth split core is axially coupled to the stator core to perform the connection of the lead wire.

1 is a perspective view of a cleaner.
2 is a plan view showing a conventional coil winding.
3 is an overall configuration diagram of a motor according to an embodiment of the present invention.
Figure 4 is an exploded perspective view of a motor according to an embodiment of the present invention.
Figure 5a is a perspective view of the split core of Figure 4;
Figure 5b is a sectional view aa' in Figure 5a.
Figure 6a is a perspective view of the upper insulator module of Figure 4;
Figure 6b is an exploded view of the upper insulator module of Figure 4;
Figure 7 is a perspective view and exploded view of the lower insulator module of Figure 4;
Figure 8 is a cross-sectional view of the lower insulator module of Figure 4;

Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. The following detailed description is provided to aid in a comprehensive understanding of the methods, devices, and/or systems described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, when it is determined that a detailed description of a known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout this specification. The terms used in the detailed description are only for describing embodiments of the present invention, and should not be limiting. Unless explicitly used otherwise, expressions in the singular form include the meaning of the plural form. In this description, expressions such as "comprising" or "feature" are intended to refer to certain features, numbers, steps, actions, elements, some or combination thereof, and one or more other than those described. It should not be construed to exclude the presence or possibility of other features, numbers, steps, actions, elements, any part or combination thereof.

In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term.

Meanwhile, in describing an embodiment of the present invention, the inner side in the radial direction means that the stator core of the present embodiment is provided in a hollow cylindrical shape, so that the inner and outer circumferential surfaces of the stator core form an arc, and the stator core in the arc It means a direction toward the inside of the, and the outside in the radial direction means a direction from the inside of the stator core toward the arc.

In addition, the connection of the three-phase power supply, which will be described later, means an electrical connection, and the connection of the three-phase power lead wire may mean a physical connection, but is not necessarily limited to this meaning, and the physical connection of the three-phase power lead wire is Since the electrical connection of the three-phase power source can be accompanied, hereinafter'connection' and'connection' are used separately, but the functions of the configuration are not classified or limited.

Hereinafter, various embodiments of the present invention will be described with reference to the drawings.

1 is a perspective view of a conventional vacuum cleaner.

Referring to FIG. 1, the vacuum cleaner includes a cleaner body 1 having a motor for generating a suction force, a suction nozzle 6 for sucking air containing dust, and the cleaner body 1 and the suction nozzle 6. It may include an extension pipe (5) to connect.

Meanwhile, although not shown, the suction nozzle 6 may be directly connected to the cleaner body 1 without the extension pipe 5.

The cleaner body 1 may include a dust bin 2 in which dust separated from air is stored. Accordingly, dust introduced through the suction nozzle 6 may be stored in the dust container 2 through the extension pipe 5.

The cleaner body 1 may be provided with a handle 3 for gripping by a user. The user can perform cleaning while holding the handle 3.

The cleaner body 1 may be provided with a battery (not shown), and the cleaner body 1 may be provided with a battery accommodating part 4 in which the battery (not shown) is accommodated.

The battery accommodating part 4 may be provided under the handle 3, and the battery (not shown) may be connected to the suction nozzle 6 to supply power to the suction nozzle 6.

2 is a plan view showing a conventional coil winding.

Referring to FIG. 2, a structure of a motor of an inner rotor type of a conventional coil and a coil winding will be described. In a conventional inner rotor type motor, a tooth 83 extends from the stator core 82 toward the inside of the stator core 82 in the radial direction, and an insulator that insulates between the stator core 82 and the coil ( 84) may be provided.

In the conventional winding of the coil, a u-phase coil 85u is wound in a clockwise direction (in the direction of an arrow) at the first tooth 83. Of course, it is not necessary to be wound in a clockwise direction, and in any case, the coils of each phase need only be wound in the same direction.

When the winding of the tooth 83 is finished, the u-shaped coil 85u is drawn to the outside of the insulator 84 and is wound on the fourth tooth and the seventh tooth in the same direction as the winding of the first tooth. Two coil connection lines 86u are formed outside the insulator 84.

Similarly, the v-phase coil (85v) is wound on teeth 2, 5, and 8 in the same manner as the u-phase coil to form two connecting wires (86v), and the w-phase coil (85w) is 3, 6 And it is wound on the 9th tooth to form two connecting wires 86v.

The ends of the three-phase power coil are wound around the 9, 8, and 7 teeth, respectively, and then form a neutral point lead 87 outside the insulator 84.

The connecting lines 86 extend along the outer circumferential surface of the insulator, and the connecting lines 86 are arranged and insulated using the radial thickness of a back yoke formed by the stator core 82. .

That is, in the conventional motor, it is difficult to reduce the overall size and weight of the motor because the lead wire of the coil is arranged and insulated by the thickness in the radial direction of the back yoke. However, terminals for connection of each three-phase power lead wire and neutral point lead wire must also be provided within the thickness of the back yoke in the radial direction to secure the insulation distance.

1 and 2 described above are a schematic configuration of a small motor used for a vacuum cleaner, an inner rotor type motor, and the motor described in an embodiment of the present invention is also used for a vacuum cleaner. As a motor, an embodiment of the present invention is a motor including an insulator structure capable of securing the insulation performance of the motor while reducing the size and weight of the motor.

Hereinafter, a motor according to an embodiment of the present invention will be described with reference to FIGS. 3 to 8.

3 is an overall configuration diagram of a motor according to an embodiment of the present invention.

In Fig. 3, the overall motor structure of this embodiment is described, and the coil wiring, insulation, and insulator structures are omitted. The above contents omitted in this drawing will be described below with reference to Figs. 4 to 8, and it will be understood that the features of Figs. 4 to 8 are applied to the overall configuration of Fig. 3.

The motor of the present embodiment includes a motor unit 20, a housing in which the motor unit 20 is received and installed and forms the overall skeleton of the motor, a flow generating unit 30 installed on the top of the housing to generate a flow of air, And a diffuser 40 for dispersing the air flow generated in the flow generator 30.

The motor unit 20 is an annular stator 21, a shaft 23 penetrating through the center of the stator 21, and a rotor installed on the shaft 23 and generating rotational force by the stator 21 ( 22), and the shaft 23 is rotationally supported on both sides by a bearing 24.

It is exemplified that the motor unit 20 of this embodiment is a brushless direct current motor (BLDC). In this drawing, a structure in which the stator 21 is disposed outside the rotor 22 as a BLDC motor is shown, but the motor having the stator 21 disposed inside the rotor 22 is not excluded.

A motor housing 10 is provided below the motor unit 20 to form a space accommodating the motor unit 20, and the motor housing 10 has a cylindrical motor installation unit 11 with an open top. ) And the connecting arm 14 extending radially outwardly from the upper end of the motor installation part 11 and at the ends of the connection arm 14, which is larger than the diameter of the motor installation part 11 An annular body coupling part 15 having a diameter is provided, and a bearing support part 12 fixedly supporting the bearing 24 under the motor part 20 is provided at the center of the bottom of the motor installation part 11 Can be.

The bearing 24 may be installed in the form of a bearing assembly in which a bearing holder 70 and an elastic mesh 60 are sequentially wound around the outer circumferential surface of the bearing 24.

A bracket 50, a diffuser 40, and a flow generation unit 30 may be provided on the upper portion of the motor unit 20, and the flow generation unit 30 includes an impeller 31, an impeller cover 33 It may include.

The bracket 50 may have a central portion 54 aligned with the hole 44 formed in the central portion of the diffuser, and a support portion 51 that is formed in an annular shape and has a larger radius than the central portion 54, and , A connection portion 53 connecting the central portion 54 and the support portion 51 may be formed.

In addition, the support part 51 may be provided with a fastening part 52 protruding in a radial direction and fastened to the motor housing 10 to support the upper portion of the motor part 20.

In the diffuser 40, a hole 44 is formed in a central portion, and a plurality of cooling channel outlets 43 are provided along the outer circumferential surface of the hole 44 to provide a flow path through which heat generated from the motor unit 20 is discharged. To form.

On the other hand, along the radial direction of the diffuser 40, a cylindrical portion 412 forming an outer diameter corresponding to the outer diameter of the sidewall of the motor installation portion 11 is formed, and a plurality of the cylindrical portions 412 are formed along the outer peripheral surface of the cylindrical portion 412. Four vanes 42 are provided to guide the flow of air pressurized by the impeller 31.

The impeller 31 is installed on the upper portion of the diffuser 40 and a shaft hole 312 into which the shaft 23 is inserted is provided at the center of the impeller 31. The shaft snow hole 312 is formed on a hub 311 that supports the overall rigidity of the impeller 31, and the hub 311 has a surface that inclines downward as it gradually moves away from the center of rotation in the radial direction, It may be a four-flow impeller provided with radial blades 312.

The impeller cover 33 is provided with an air intake port 331, which is a passage through which air moves, in the upper central part, and is provided in the form of a downward slope based on the air intake port 331, and a cover at the lower end of the impeller cover 33 The coupling portion 342 may be provided, and the cover coupling portion 342 may be provided in a stepped shape so that the body coupling portion 15 is fitted inside the stepped shape.

4 is an exploded perspective view of a motor according to an embodiment of the present invention.

Referring to Figure 4, the motor of this embodiment is a motor including a stator and a rotor provided to rotate with respect to the stator, a stator core 300 forming a back yoke, and a radius of the back yoke A tooth 520 extending in the direction, a coil 510, an insulator module 100 coupled to the upper and lower portions of the stator core 300, respectively, and a split core 500 inserted in the axial direction into the stator core 300 ) Can be included.

In this embodiment, the teeth 520 extend radially inward of the back yoke (Inner Type), but are not limited thereto and may extend radially outward (Outer Type).

And, in this embodiment, the intensive winding is applied to the tooth 520 and a tooth splitting core inserted in the axial direction (longitudinal direction) of the stator core 300 is taken as an example, which reduces the size of the motor. This is because the size of the stator core 300 that occurs causes a space limitation, and it is difficult to connect the tooth split core to the back yoke of the stator in the radial direction of the motor.

The insulator module 100 may include an upper insulator module 100U coupled to an upper portion of the stator core 300 and a lower insulator module 100L coupled to a lower portion of the stator core 300.

The upper insulator module (100U) is a power terminal unit 110 connected to each phase of the three-phase power supply of the coil 510 and an upper insulator that insulates between the power terminal unit 110 and the stator core 300 150 may be included.

The power terminal unit 110 is formed protruding toward the upper portion of the power terminal unit 110 within the radius of the back yoke, and is connected to the three-phase power lead line 511 and the power terminal 113 and the power terminal It includes a connection terminal 111 connected to 113 and connected to any one of the three-phase power supply of the coil, and a power connection member 112 connecting the connection terminal 111 and the power terminal 113 can do.

The connection terminal 111 may be connected to a three-phase power supply of the coil 510 to be connected to a circuit board (not shown), and to be electrically and physically connected through the power terminal 113 and the power connection member 112. I can.

The power connection member 112 electrically and physically connects the power terminal 113 and the connection terminal 111, and the upper surface 112u of the power connection member forms part of the upper surface of the upper insulator module 100U. The side surface 112s of the power connection member may form part of the inner circumferential surface of the upper insulator module 100U.

That is, the upper surface 112u of the power connection member may be located on the uppermost surface of the upper insulator module 100U, and the connection terminal 111 may be provided extending from the uppermost surface toward the upper side, and the power connection member The side surface 112s of the upper insulator module 100U is bent in correspondence with the shape as the upper insulator module 100U is provided in a hollow shape to form a part of the inner circumferential surface of the upper insulator module 100U, and the upper insulator module The uppermost layer can be formed on the cross section of (100U).

However, the upper surface 112u of the power connection member does not necessarily form the upper surface of the upper insulator module 100U, and the upper insulator 150 is also provided on the upper surface 112u of the power connection member. The upper insulator 150 may be formed in the uppermost layer on the cross section of the module 100U. That is, in this case, the upper surface 112u of the power connection member 112 will be wrapped by the upper insulator 150.

The upper insulator 150 may have an axial thickness of a first height H1, and the power terminal unit 110 may be located within the first height H1 in the upper insulator module 100U. I can. That is, an insulation distance between the power terminal unit 110 and the stator core 300 may be secured by the first height H1.

The stator core 300 includes an inner circumferential surface 330 forming a back yoke and a groove 331 formed along the circumference of the inner circumferential surface 330, and forming a space into which the split core 500 is inserted. It may be provided in a cylindrical shape, and a portion of the inner peripheral surface 330 and the outer peripheral surface 310 of the stator core 300 may be recessed into the inside of the stator core (300).

That is, flat portions 310a and 330a may be formed on some of the inner circumferential surface 330 and the outer circumferential surface 310 of the stator core 300.

The flat portions 310a and 330a can reduce the overall size of the motor by reducing the thickness of the stator core 300 in the radial direction, as well as resistance to magnetic flux flowing through the stator core 300. By removing some parts that can act, the performance of the motor can be improved.

On the other hand, the shape of the insulator module 100 may be provided to correspond to the shape of the stator core 300, may be provided in a cylindrical shape with a center penetrating therethrough, and the plane of the outer peripheral surface of the insulator module 100 Flat portions 150a and 155a may be formed in portions that contact the portions 310a and 330a.

In addition, at least one groove 331 may be formed along a circumference of the inner circumferential surface 330 in a part of the inner circumferential surface 330 of the stator core 300, and the split core 500 in the groove 331 Teeth 520 of the can be coupled in the axial direction (length direction of the stator core).

Meanwhile, the lower insulator module 100L may include a neutral terminal unit 130 connected to the neutral point of the coil, and lower insulators 155 and 157 provided to surround at least a portion of an outer circumferential surface of the neutral terminal unit 130. .

The neutral terminal unit 130 may include a neutral terminal 131 protruding in the radial direction of the back yoke and connected to the neutral point of the coil, and a neutral connection member 132 connecting the neutral terminal 131. In addition, the lower insulator surrounds the neutral terminal 131 and surrounds the outer circumferential surface of the first insulator 157 and the neutral connection member 132 provided in a hollow shape, and the neutral connection member 132 is seated. It may include a second insulator 155 in which the groove 151 is formed.

The neutral connection member 132 may be provided in a hollow shape corresponding to the shape of the stator core 300, and the neutral terminal 131 is radially inner side of the back yoke from the neutral connection member 132 Can be extended to

In addition, the neutral terminal 131 may be partially extended in the axial direction from the neutral connecting member 132 and then bent to extend radially inward of the back yoke. Because, in this embodiment, the lower insulators 155 and 157 cover only a part of the outer peripheral surface of the neutral terminal unit 130, and the neutral terminal 131 is exposed to the outside, so the split core 500 and the stator core 300 This is to secure the insulation distance from insulators such as ).

That is, by securing an additional structurally insulating distance, the insulator for insulation can be consumed less, and after the first insulator 157 and the power terminal unit 131 are manufactured by an insert injection method, the second It can be easily seated on the insulator 155.

Meanwhile, a guide part 1571 for guiding the insertion of the neutral point lead line 513 may be formed on the lower insulators 155 and 157, and a hole in the neutral terminal unit 130 corresponding to the guide part 1571 After 1311 is formed and the neutral point leader line 511 is inserted through the guide part 1571, it may be connected to the neutral terminal unit 130, and details will be described later with reference to FIGS. 7 and 8 .

FIG. 5A is a perspective view of the split core of FIG. 4, and FIG. 5B is a cross-sectional view of FIG. 5A.

5A and 5B, the split core 500 of this embodiment is a tooth split core, and is based on an axis perpendicular to the radial direction of the stator core 300 (same axis as the axis of rotation of the shaft). It may be inserted into the stator core 300.

The tooth 520 may include an insulator 530 that surrounds the tooth 520 and insulates between the coil 510 and the tooth 520, and a groove 531 is formed in the insulator 530 Thus, the three-phase power lead wire 511 of the coil 510 can be fitted into the groove.

Meanwhile, the insulator 530 surrounds the outside of the winding portion 523 of the tooth 520 and the pole shoe 525, and forms a section in which the coil 510 is wound.

As described above, the coil 510 may be wound on each tooth 520 by a concentrated winding method, and the three-phase power lead wire 511 is drawn toward the upper portion of the split core 500. In addition, the neutral point lead line 513 may be drawn toward a lower portion of the split core 500.

Because the motor of this embodiment is based on the stator core 300, the split core 500 is inserted into the stator core 300 from the lower portion of the stator core 300 along the axial direction, and the upper insulator The module 100U is a structure located at the top of the stator core 300 in contact with the top of the stator core 300 along the axial direction, and the lower insulator module 100L is located at the bottom of the stator core 300 It is a structure located in contact with the lower portion of the stator core 300 along the axial direction.

Therefore, in the insulator module 100, the three-phase power lead wire 511 must be connected in the upper insulator module 100U, and the neutral point lead wire 513 is connected in the lower insulator module 100L. Since it must be performed, it is preferable that the lead lines of the coil 510 are drawn in different directions toward the upper and lower portions of the split core 500, respectively.

In addition, the lead wires may be connected to a terminal provided in the insulator module 100 within the radial direction of the back yoke.

On the other hand, when the coil 510 is wound in the first direction D1, the coil 510 is wound from the tooth 520 in the radial direction from the outer side to the inner side of the back yoke, and the tooth 520 The winding starts clockwise or counterclockwise from the top to the bottom of ), and the coil 510 is wound from the bottom of the tooth 520 toward the top to be connected.

In addition, when the coil 510 is wound in the second direction D2, the coil 510 is wound from the tooth 520 to the outer side in the radial direction of the back yoke, and the tooth 520 The winding is started clockwise or counterclockwise from the top to the bottom of ), and the coil 510 may be wound on the bottom of the tooth 520 and connected to the top.

An upper portion of the tooth 520 may mean a portion close to the upper insulator module 100U, and a lower portion of the tooth 520 may mean an opposite side of the upper portion.

As a result, even if the coil 510 is wound in either the first direction (D1) or the second direction (D2), the lead line 511 of the three-phase power source is inside the radial direction of the back yoke. It is drawn out toward the upper portion of the tooth 520, and the neutral point lead line 513 may be drawn out toward the lower portion of the tooth 520 from the inside of the back yoke in the radial direction.

In this embodiment, since the power terminal 113 is located on the upper surface of the upper insulator module 100U, the three-phase power lead line 511 is drawn out from the tooth 520 from a side relatively close to the back yoke. desirable.

In addition, the neutral point leader line 513 is preferably drawn out from a portion located close to the pole shoe 525. Because the neutral terminal 131 is provided inside the lower insulator module 100L, the neutral point lead line 513 is directly inserted into the neutral terminal 131 without bending the neutral point lead line 513. This is to facilitate connection to the neutral terminal 131.

Therefore, the three-phase power lead 511 and the neutral point lead 513 can both be connected to terminals inside the insulator module 100, which means that the lead wires are in the radial direction of the back yoke, that is, the stator core ( It can also be interpreted that the connection is made within the radial direction of 300).

On the other hand, the three-phase power lead wire 511 is a coil 510 is drawn from the upper portion of the tooth 520 toward the radial direction of the back yoke to the groove 531 formed in the upper portion of the insulator 530 After being fixed, it may be connected to the power terminal 113.

Three power terminals 113 may be provided to correspond to each phase of the three-phase power supply at intervals of 120 degrees, and some of the power terminals 113 are connected to the connection terminal 111 through the power connection member 112 Electrical connection of three-phase power can be performed.

The tooth 520 includes a coupling portion 521 coupled to the coupling groove 331 of the stator core 300 and a winding portion 523 extending from the coupling portion 521 toward the radial direction of the back yoke. It includes a pole shoe 525 extending to both sides of the winding part 523 to form a magnetic circuit.

The pole shoe 525 extends from the inside of the stator core 300 to both sides of the winding part 523 in a curved shape along a virtual circumferential surface, and the neutral point leader line 513 secures insulation performance. For this purpose, it may be connected between the inner circumferential surface of the stator core 300 and the virtual circumferential surface.

6A and 6B are perspective and exploded views of the upper insulator module of FIG. 4.

Referring to Figure 6, the upper insulator module (100U) of this embodiment may include a power terminal unit 110 and an upper insulator 150, the power terminal unit 110 is a connection terminal 111, power connection A member 112 and a power terminal 113 may be included, and the power terminal 113 may include an inclined portion 1131 and a fixing portion 1132.

The connection terminal 111 may be connected to a three-phase power supply of the coil 510 to be connected to a circuit board (not shown), and to be electrically and physically connected through the power terminal 113 and the power connection member 112. I can.

The connection terminal 111 may be provided to extend from the upper insulator module 100U in the axial direction, and may be provided in the radial direction of the back yoke. That is, the connection terminal 111 may be provided straight toward the top within a predetermined thickness T formed by the upper insulator module 100U.

The power connection member 112 electrically and physically connects the power terminal 113 and the connection terminal 111, and the upper surface 112u of the power connection member covers a part of the upper surface of the upper insulator module 100U. The side surface 112s of the power connection member may form a part of the inner circumferential surface of the upper insulator module 100U.

That is, the upper surface 112u of the power connection member may be located on the uppermost surface of the upper insulator module 100U, and the connection terminal 111 may be provided extending from the uppermost surface toward the upper side.

And the side surface 112s of the power connection member is bent to correspond to the shape of the upper insulator module 100U to form part of the inner circumferential surface of the upper insulator module 100U, and the upper insulator module 100U ) Can form the top layer on the cross section.

The power terminal 113 is formed to protrude upward from the fixing part 1132 and the fixing part 1132 forming a space accommodating the three-phase power lead 511 of the coil 510, and the coil ( An inclined portion 1131 for guiding 510 to the fixing portion 1132 may be included.

The fixing part 1132 may form a space in which the three-phase power lead wire 511 can be fitted, and preferably, the fixing part 1132 is larger than the diameter of the three-phase power lead wire 511. It can be formed in a small width.

That is, by forming a predetermined press-fitting tolerance with respect to the diameter of the three-phase power lead 511, the three-phase power lead 511 may be fixed to the fixing portion 1132 by a force fitting method.

On the other hand, the inclined portion 1131 protrudes upward from both sides of the fixing portion 1132, and forms a predetermined inclination angle inside to guide the three-phase power lead line 511 to the fixing portion 1132 can do.

Meanwhile, the upper insulator module 100U may have a predetermined thickness T, and the upper surface 112u of the power connection member may be formed with a first thickness T1 that is thinner than the thickness T. have. Accordingly, the thickness T may correspond to the sum of the first thickness T1 and a partial thickness T2 of the upper surface of the upper insulator 150.

In addition, the upper insulator module 100U may have a first height H1, and the side surface 112s of the power connection member may be formed to have a height smaller than the first height H1. Therefore, the first height H1 corresponds to the sum of the height formed by the side surface 112s of the power connection member and the height of the inner side surface of the upper insulator 150 excluding the height of the side surface 112s of the power connection member. Can be.

That is, the power terminal unit 110 may be provided in a form enclosed in a height direction and a radial direction by the upper insulator 150.

The upper insulator 150 may form a flat portion 150a in which a portion of the outer circumferential surface is recessed inward, and the flat portion 150a is a flat portion formed on a portion of the outer circumferential surface of the stator core 300 It may correspond to the location of (310a).

On the other hand, the power terminal unit 110 corresponds to each of the three phases can be formed of three separate members, one of which is the connection terminal 111 and the power terminal 113 without the power connection member 112 Electrical and physical connections can be made by contacting them.

The power terminal unit 110 to which the power connection member 112 is bent may preferably be bent at the same curvature.

In addition, the power terminal 113 may be preferably provided at intervals of 120 degrees, and the lead wire 511 of the three-phase power supply is used without the need to connect the back yoke or the insulator using the radial thickness. Can be wired to the power terminal.

On the other hand, a seating groove 151 in which the power terminal unit 110 can be seated may be formed on the upper surface of the upper insulator module 100U, and the seating groove 151 corresponds to the three separate members. Can be formed. In addition, each of the power terminal units may be positioned at a predetermined distance apart from each other by the mounting groove 151, and an upper insulator 150 may be provided between the predetermined distances.

In addition, the upper insulator module 100U may be fixed to the seating groove 151 formed in the upper insulator 150 with the power terminal unit 110 as shown in FIG. 6B, or the power terminal unit 110 ) And the upper insulator 150 may be formed by an insert injection method.

7 is a perspective view and an exploded view of the lower insulator module of FIG. 4, and FIG. 8 is a cross-sectional view of the lower insulator module of FIG. 4.

7 and 8, the lower insulator module 100L of the present embodiment may include a neutral terminal unit 130 and lower insulators 155 and 157, and the neutral terminal unit 130 is a neutral terminal 131 And a neutral connection member 132, and the lower insulator may include a first insulator 157 and a second insulator 155.

The neutral terminal unit 130 is connected to the neutral point of the coil, and specifically includes a hole 1311 into which the neutral point lead line 513 of the coil is inserted, and the neutral point lead line 513 is in the hole 1311. By being inserted, it may be connected to the neutral point leader line 513.

As described above, the neutral terminal 131 is bent and extended from the neutral connection member 132 toward the inner side of the lower insulator module 100L, and the neutral connection member 132 includes the second insulator 155 As it is provided in a hollow shape, it may be bent to correspond to the shape of the second insulator 155.

Meanwhile, the hole 1311 may be formed in the neutral terminal 131, and the hole 1311 may have a diameter corresponding to the second width W2.

The first insulator 157 may be provided in a hollow shape surrounding the neutral terminal 131, and the guide part 1571 may be formed. The guide part 1571 may be provided at a position corresponding to the hole 1311 to guide the neutral point leader line 513 to be inserted into the hole 1311.

The guide part 1571 may be formed through the first insulator 157 to guide the insertion of the neutral point lead line, and the cross section of the guide part 1571 is a progression in which the neutral point lead line 513 is inserted. The width of the cross section may be reduced along the direction (i), and may be provided to communicate with the hole 1311.

Communication with the hole 1311 means that the hole 1311 may be provided in the traveling direction i of the neutral point leader line 513 inserted along the guide part 1571, and the guide part 1571 The portion where the hole 1311 is located may have a diameter equal to the second width W2 corresponding to the diameter of the hole 1311.

The neutral point leader line 513 may be inserted from the top to the bottom of the lower insulator 100L, and may be inserted into the guide part 1571 along the traveling direction i.

The guide part 1571 may have a first width W1 wider than the second width W2 at an upper side based on the second width W2, and based on the second width W2. The lower side may form a third width W3 that is thinner than the second width W2. That is, as described above, the width formed by the cross section of the guide part 1571 along the traveling direction i may be reduced.

In addition, the second width W2 may correspond to the diameter of the coil 510, and the third width W3 is smaller than the second width W2, so that the diameter is smaller than the diameter of the coil 510. It can be provided. In this case, the third width W3 may be understood as forming a predetermined press fit tolerance with respect to the coil 510, and the coil 510 is an inner peripheral surface of the third width W3 by a force fitting method. It can be fixed while cutting down.

Of course, the neutral point leader line 513 does not need to be fitted and fixed to one end of the guide part 1571, and the second width W2 after being connected to the neutral terminal 131 in contact with the hole 1311 It is okay to be fitted and fixed only on a part of the lower side.

In addition, the guide portion 1571 of the present embodiment is provided to penetrate the upper and lower surfaces of the first insulator 157, but it is not necessarily limited to this embodiment, and as described above, the neutral point leader line ( It forms an inlet into which the 513 is inserted, and may have various shapes communicating with the hole 1311. As an example, the hole 1311 may be communicated with and may be provided in the form of a closed groove on the lower end side of the first insulator 157.

Meanwhile, the first insulator 155 may have a second height H2, the second insulator 157 may have a third height H3, and the neutral connection member 132 A fourth height H4 may be formed.

Each of the heights is a height for securing an insulation distance of the neutral terminal unit 130, and the second height H2 is formed on the second insulator 155 to seat the neutral connection member 132 The depth of the groove 153 may be included, and the third height H3 is a part of the neutral terminal 131 where the hole 1311 is formed and a part of the neutral point lead 513 inserted into the hole 1311 It can be formed to wrap.

The fourth height H4 is the height of the neutral connection member 132, and in this embodiment, when the neutral connection member 132 is seated in the seating groove 153, the side surface of the neutral connection member 132 Some of them are exposed to the outside so that the fourth height (H4) is formed longer than the depth of the seating groove 153, but the fourth height (H4) corresponds to the depth of the seating groove 153, so that the neutral All sides of the connecting member 132 may be provided to be wrapped by the mounting groove 153. Of course, the fourth height (H4) may be formed to be shorter than the depth of the seating groove 153 so that the neutral connection member 132 may be provided so that both one side and the top surface are wrapped around the first insulator 155 There will be.

Although the exemplary embodiments of the present invention have been described in detail above, those of ordinary skill in the art to which the present invention pertains will understand that various modifications may be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention is limited to the described embodiments and should not be determined, and should not be determined by the claims to be described later, but also by those equivalents to the claims.

100: insulator module
110U: upper insulator module 110L: lower insulator module
110: power terminal unit 111: connection terminal
112: power connection member 113: power terminal
151: upper insulator
130: neutral terminal unit 131: neutral terminal
132: neutral connection member 155: second insulator
157: first insulator
300: stator core
500: split core
510: coil 511: 3-phase power lead wire
513: neutral point leader 520: Tee

Claims (20)

In the motor comprising a stator and a rotor provided to rotate with respect to the stator,
The stator,
A stator core forming a back yoke;
A tooth extending in the radial direction of the back yoke;
coil; And
Includes; a lower insulator module coupled to the lower portion of the stator core,
The lower insulator module,
A neutral terminal unit connected to the neutral point of the coil; And
Including; a lower insulator provided to surround at least a portion of the outer peripheral surface of the neutral terminal unit,
The neutral terminal unit, the motor comprising a; hole through which the lead wire of the neutral point of the coil is inserted. The method of claim 1,
Wherein the lower insulator surrounds the hole and guides the insertion of the neutral point leader line. The method of claim 2,
The cross-section of the guide portion is a motor, characterized in that the width of the cross-section decreases along a traveling direction in which the neutral point leader line is inserted. The method of claim 3,
Motor, characterized in that at least a portion of the cross-sectional width of the guide portion coincides with the diameter of the hole. The method of claim 2,
The neutral terminal unit,
A neutral terminal protruding in the radial direction of the back yoke and connected to the neutral point of the coil; And
And a neutral connection member connecting the neutral terminal. The method of claim 5,
The lower insulator,
A first insulator that surrounds the neutral terminal and is provided in a hollow shape and provided with the guide part; And
And a second insulator surrounding the outer circumferential surface of the neutral connection member and forming a seating groove in which the neutral connection member is seated. The method of claim 1,
The stator,
Further comprising; an upper insulator module coupled to the upper portion of the stator core,
The upper insulator module,
A power terminal unit connected to the three-phase power lead line of the coil; And
And an upper insulator insulating between the power terminal unit and the stator core. The method of claim 7,
The power terminal unit,
A power terminal protruding toward an upper portion of the power terminal unit within a radius of the back yoke and connected to a three-phase power lead line of the coil; And
And a connection terminal connected to the power terminal and connected to any one of the three-phase power sources of the coil. The method of claim 8,
The power terminal,
A fixing part forming a space for accommodating the three-phase power lead wire of the coil; And
And an inclined portion protruding from the fixing portion to guide the coil to the fixing portion. The method of claim 8,
The power terminal unit,
And a power connection member having one side connected to the power terminal and the other side connected to the connection terminal. The method of claim 10,
The power connection member is a motor, characterized in that forming a part of the upper surface of the upper insulator module. In the motor comprising a stator and a rotor provided to rotate with respect to the stator,
The stator,
A stator core including an inner circumferential surface forming a back yoke and a groove formed along a circumference of the inner circumferential surface;
A tooth including a coupling portion coupled to the groove and a winding portion extending from the coupling portion toward a radially inner side of the back yoke;
A coil wound around the tooth;
An upper insulator module coupled to an upper portion of the stator core; And
Includes; a lower insulator module coupled to the lower portion of the stator core,
The upper insulator module,
A power terminal unit connected to each phase of the three-phase power supply of the coil; And
Includes; an upper insulator insulating between the power terminal unit and the stator core,
The lower insulator module,
A neutral terminal unit connected to the neutral point of the coil; And
Including; a lower insulator provided to surround at least a portion of the outer peripheral surface of the neutral terminal unit,
The three-phase power lead wire of the coil is drawn from an upper portion of the tooth, and the neutral point lead line of the coil is drawn from a lower portion of the tooth and is connected to the power terminal unit and the neutral terminal unit, respectively. The method of claim 12,
The motor, characterized in that the three-phase power lead wire is drawn out toward the outer side in the radial direction of the back yoke and is connected to the power terminal. The method of claim 13,
The neutral point leader line is a motor, characterized in that the connection to the neutral terminal from the inner radial direction of the back yoke. The method of claim 12,
The neutral terminal unit,
A neutral terminal protruding toward the inside of the back yoke in the radial direction and connected to the neutral point of the coil; And
Including; a neutral connection member connecting the neutral terminal,
And a hole into which the neutral point lead line is inserted. The method of claim 15,
The lower insulator,
A first insulator that surrounds the neutral terminal and is provided in a hollow shape and has a diameter smaller than that of the back yoke; And
And a second insulator surrounding the outer circumferential surface of the neutral connection member and forming a seating groove in which the neutral connection member is seated. The method of claim 16,
The first insulator,
And a guide portion formed through the first insulator to guide insertion of the neutral point leader line. The method of claim 17,
The cross-section of the guide portion is a motor, characterized in that the width of the cross-section decreases along a traveling direction in which the neutral point leader line is inserted. The method of claim 18,
The guide portion, the motor, characterized in that provided to communicate with the hole. The method of claim 15,
The motor, characterized in that the neutral terminal is formed at the same height in the lower insulator module.

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