KR102469628B1 - Motor - Google Patents

Abstract

An object of the present invention is to provide a motor with an improved structure of a bus bar and an insulator capable of solving spatial limitations caused by miniaturization of the motor.
According to the present invention, in a motor including a stator and a rotor, the stator includes a stator core forming a back yoke, teeth and coils extending in a radial direction of the back yoke, and an upper insulator coupled to an upper portion of the stator core. module, and the lead wire of the coil is guided through a protruding member provided on the upper insulator module and connected to a power terminal.

Description

motor {MOTOR}

Various embodiments of the present invention relate to a motor in which an insulator structure of the motor is improved.

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

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 divided according to the type or phase of power applied to the stator coil. In addition, motor types are divided according to the winding method of the stator coil. For example, there are DC type variable voltage motors and AC type three-phase induction motors.

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

The stator is provided with teeth, and a coil forming a rotating magnetic field is wound on the teeth to cause electrical interaction with the rotor to induce rotation of the rotor.

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

In the case of concentrated winding, it is possible to reduce the amount of winding and reduce copper loss compared to distributed winding, but the coil is excessively concentrated in the slot, so the change in magnetic flux density is large, and core loss or iron loss, i.e., iron core 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 limitations 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 winding coils in the winding space or increase the diameter of the coil. The winding space formed between the teeth of the stator has a limited size. If the size is reduced, the insulation of the coil cannot be secured, which can 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 differently disposing the central axis of a virtual circle extending the inner circumferential surface of a terminal of the same shape, and Patent Document 2 (10- 2017-0052986, published on May 15, 2017) discloses a structure in which a fixed 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 is fitted to the upper surface of the stator in an annular structure by improving the terminal structure of the bus bar, and Patent Document 4 (10-2016-0030924, published on March 21, 2016) discloses that the input/output terminal of the bus bar is Disclosed is a structure in which the upper and lower crosses are disposed on the outer circumference.

However, since the bus bar and insulator structure applied to the above patent documents is a method in which a plurality of bus bars are positioned in the outer diameter inner direction of the motor and the lead wire is wound around the insulator, a lot of space is required in the radial direction.

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

Therefore, there is a need for structural improvement capable of ensuring insulation performance while reducing the size of 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 (2016.12.07. Publication) Patent Document 4: 10-2016-0030924 (published on March 21, 2016)

Therefore, one of the various tasks of the present invention is to provide a motor with improved structures of a bus bar and an insulator capable of solving spatial limitations caused by miniaturization of the motor.

One of the various problems of the present invention is to provide a bus bar with improved insulation performance and a motor with improved insulator structure by securing an insulation distance between a stator core and a lead wire of a coil.

One of the various tasks of the present invention is to provide a motor in which a portion that can act as resistance is minimized by minimizing a distance between a three-phase power lead wire and a bus bar directly coupled to an inverter.

One of the various tasks of the present invention is to provide a motor to which a tooth division core and concentrated winding are applied in order to secure 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 neutral point lead wires without being restricted by the outer diameter of the stator and the radial direction of the back yoke.

One of the various tasks of the present invention is to provide a motor that can be wired to a power terminal by using the structural characteristics of an insulator after winding a coil around teeth without bending U, V, and W lead wires.

One of the various tasks of the present invention is to provide a motor with an improved insulator structure so that the insulation distance of U, V, W and neutral point lead wires can be secured without being restricted by the space in the radial direction of the back yoke. want to do

One of the various tasks of the present invention is to provide a motor with a structure in which a bus bar and an insulator structure are coupled in a radial direction of a stator core for miniaturization of the motor.

One of the various problems of the present invention is to provide a motor with a structure in which a tooth split core is axially coupled to a stator core and a lead wire can be connected.

In order to solve various problems of the present invention, an exemplary embodiment of the present invention is provided that the shape of the insulator is not limited to the outer diameter of the stator and the thickness of the back yoke, and is provided in the axial direction of the motor and the inner space of the stator provide a motor.

An exemplary embodiment of the present invention provides a motor in which U, V, and W lead wires are directly coupled to an inverter through a connection structure between an insulator and a terminal.

Exemplary embodiments of the present invention provide a motor in which the connection of U, V, and W lead wires and the neutral wire are processed on one side of the stator core.

An exemplary embodiment of the present invention provides a motor capable of securing dielectric strength by ensuring an insulation distance between a stator core, bus bars (U, V, and W lead wires), and a neutral connection ring.

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 teeth and coils extending in a radial direction of the back yoke. and an upper insulator module coupled to an upper portion of the stator core, wherein the upper insulator module comprises a power terminal unit connected to each phase of the three-phase power supply of the coil and insulating between the power terminal unit and the stator core. and an upper insulator, wherein the upper insulator protrudes a predetermined length in a radial direction of the upper insulator and includes a protruding member including a guide portion for guiding insertion of a three-phase power lead of the coil. provides

Preferably, the cross section of the guide part may have a smaller width along the direction in which the three-phase power lead wire is inserted, or the guide part may be provided in the shape of a hole penetrating the protruding member so that the three-phase power lead wire is inserted. The circumference of the circumference may be reduced along the direction in which the insertion is performed.

The power terminal unit may include a power terminal provided on an upper portion of the protruding member and connected to a three-phase power lead wire of the coil passing through the guide portion, and the power terminal may be provided on an upper portion of the guide portion. And, the lead wire of the three-phase power supply of the coil may be drawn toward the guide part and connected to the power terminal.

The power terminal unit may include a connection terminal connected to the power terminal and connected to any one phase of the three-phase power source of the coil, and the connection terminal may be provided on an upper portion of the protruding member.

Meanwhile, the stator includes a lower insulator module coupled to a lower portion of the stator core, and the lower insulator module includes a neutral terminal unit connected to a neutral point of the coil and insulating between the neutral terminal unit and the stator core. A lower insulator may be included.

The neutral terminal unit may include a neutral terminal protruding in a radial direction of the back yoke and connected to a neutral point of the coil, and a neutral connecting member connecting the neutral terminal to the lower insulator. A part of the inner surface of the module may be formed, and the neutral terminal may be formed at the same height as the lower insulator module.

In addition, the neutral point lead of the coil may be connected to the neutral terminal inside the lower insulator module.

Meanwhile, 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 an inner circumferential surface forming a back yoke and a groove formed along the circumference of the inner circumferential surface. A stator core and a coupling portion coupled to the groove, a tooth including a winding portion extending from the coupling portion toward a radially inner side of the back yoke, a coil wound on the tooth, and an upper portion coupled to the upper portion of the stator core An insulator module and a lower insulator module coupled to a lower portion of the stator core, wherein the upper insulator module comprises a power terminal unit connected to each phase of the three-phase power supply of the coil and a power terminal unit connected between the power terminal unit and the stator core. The lower insulator module includes a neutral terminal unit connected to a neutral point of the coil and a lower insulator configured to insulate between the neutral terminal unit and the stator core, and withdraws three-phase power from the coil. The wire and the neutral lead wire of the coil are drawn out in different directions to provide a motor characterized in that they are wired to the power terminal unit and the neutral terminal unit, respectively.

The power terminal unit includes a power terminal connected to a three-phase power lead of the coil, the neutral terminal unit includes a neutral terminal connected to a neutral point lead of the coil, and the power terminal and the neutral terminal are , It may be provided on the inside of the radial direction of the back yoke.

The upper insulator may include a protruding member protruding a predetermined length toward an inner side of the upper insulator in a radial direction, and the power terminal may be connected to the protruding member.

The protruding member may include a guide portion penetrating the protruding member to guide insertion of the three-phase power lead of the coil, and the power terminal may be provided above the guide portion.

The neutral terminal unit may include a neutral terminal protruding inward in a radial direction of the back yoke and a neutral connection member connecting the neutral terminal, and a cross section of the module of the lower insulator may include the neutral terminal unit and the neutral terminal unit. The lower insulators may be formed by crossing each other, and the neutral terminal may be formed at the same height as the lower insulator module.

Meanwhile, the three-phase power lead wire of the coil may be drawn toward the upper portion of the tooth, and the neutral point lead wire of the coil may be drawn toward the lower portion of the tooth.

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

According to the present invention, the outer diameter of the stator can be reduced, and the thickness of the back yoke in the radial direction can be formed thin, so that miniaturization and weight reduction of the motor can be realized.

In addition, without being restricted by the radial thickness of the back yoke, it is possible to perform the wiring of the three-phase power supply (U, V, W) and the neutral lead wire, and the lead wire of the three-phase power supply (U, V, W) of the present invention By being wired by the connection structure disclosed in, it is possible to minimize the portion that can act as resistance.

In addition, since the insulator module is coupled to the stator core in the axial direction, the motor can be miniaturized by minimizing the thickness of the stator core in the radial direction.

In addition, the insulation distance between the stator core, the bus bar (U, V, W outgoing lines) and the neutral connection ring is secured, so that dielectric strength can be secured.

In addition, since the power terminal and the neutral terminal are separated vertically based on the stator core, it is possible to secure dielectric strength between each terminal, and each terminal secures dielectric strength with the stator core by the insulator structure disclosed in the present invention. can do.

In addition, in order to increase the speed and size of the motor, concentrated winding is applied to the tooth division core, and the tooth division core is coupled to the stator core in the axial direction to perform lead wire wiring.

1 is a perspective view of a vacuum cleaner;
Figure 2 is a plan view showing the winding of a conventional coil.
Figure 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 aa` cross-sectional view of Figure 4a.
Fig. 6a is a perspective view of the upper insulator module of Fig. 4;
6B is a perspective view of an upper insulator module according to another embodiment of the present invention;
Fig. 7 is a cross-sectional view of Fig. 6A;
Fig. 8 is an exploded and cross-sectional view of the lower insulator module of Fig. 4;

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The detailed descriptions that follow are provided to provide 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, if it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. 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 a user or operator. Therefore, the definition should be made based on the contents throughout this specification. Terminology used in the detailed description is only for describing the embodiments of the present invention and should in no way be limiting. Unless expressly used otherwise, singular forms of expression include plural forms. In this description, expressions such as "comprising" or "comprising" are intended to indicate any characteristic, number, step, operation, element, portion or combination thereof, one or more other than those described. It should not be construed to exclude the existence or possibility of any other feature, number, step, operation, element, part or combination thereof.

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

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The detailed descriptions that follow are provided to provide 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.

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 suction force, a suction nozzle 6 for sucking air containing dust, and the cleaner body 1 and the suction nozzle 6 ) may include an extension pipe 5 connecting the

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 container 2 in which dust separated from the air is stored. Accordingly, dust introduced through the suction nozzle 6 may be stored in the dust bin 2 through the extension tube 5 .

The cleaner body 1 may include a handle 3 for a user to grip. The user can perform cleaning while holding the handle 3 .

A battery (not shown) may be provided in the cleaner body 1, and a battery accommodating part 4 for accommodating the battery (not shown) may be provided in the cleaner body 1. The battery accommodating part 4 may be provided under the handle 3 . 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 windings of a conventional coil.

Referring to FIG. 2, a structure of a conventional inner rotor type motor and coil winding of a coil will be described. In a conventional inner rotor type motor, the teeth 83 extend from the stator core 82 toward the inner side in the radial direction of the stator core 82, and insulate between the stator core 82 and the coil ( 84) may be provided.

As for the winding of the conventional coil, the u-phase coil 85u is wound clockwise (direction of the arrow) at the number 1 tooth 83. Of course, it is not necessarily necessary to wind 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-phase coil 85u is drawn out of the insulator 84 and wound around the 4th and 7th teeth in the same winding direction as the 1st tooth, On the outside of the insulator 84, two coil connection lines 86u are formed. Similarly, the v-phase coil (85v) is wound on the 2nd, 5th, and 8th teeth in the same way as the u-phase coil to form two connecting lines (86v), and the w-phase coil (85w) is 3rd, 6th Then, it is wound around the 9th tooth to form two connection lines (86v). The ends of the three-phase power supply coil are wound around the 9th, 8th, and 7th teeth, respectively, and form a neutral point lead wire 87 on the outside of the insulator 84.

The connection lines 86 extend along the outer circumferential surface of the insulator and arrange and insulate the connection lines 86 by utilizing the radial thickness of the back yoke formed by the stator core 82 .

That is, in the conventional motor, since the lead wire of the coil is arranged and insulated by the thickness of the back yoke in the radial direction, it is difficult to reduce the overall size and weight of the motor. In addition, this drawing does not show However, the terminal for wiring each of the three-phase power lead wire and the neutral point lead wire is also a structure that must be provided within the thickness of the radial direction of the back yoke to secure an insulation distance.

1 and 2 described above describe an approximate configuration of a small motor and an inner rotor type motor used in a vacuum cleaner, etc., and a motor described in an embodiment of the present invention below is also a small motor used in a vacuum cleaner. As a motor, it is a motor that includes an insulator structure capable of ensuring insulation performance of the motor while miniaturizing and reducing the weight of the motor.

Hereinafter, a motor according to an embodiment of the present invention will be described with reference to FIGS. 3 to 10 .

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 explained, and coil wiring, insulation, and insulator structures are omitted. The contents omitted from this drawing will be described in FIGS. 4 to 8 below, 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 this embodiment includes a motor unit 20, a housing in which the motor unit 20 is accommodated and installed and forming the overall skeleton of the motor, a flow generating unit 30 installed on the top of the housing to generate a flow of air, A diffuser 40 dispersing the air flow generated by the flow generator 30 is included.

The motor unit 20 includes an annular stator 21, a shaft 23 passing 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 by a bearing 24.

The motor unit 20 of this embodiment is exemplified as a BLDC motor (brushless direct current motor). Although this figure shows a structure in which the stator 21 is disposed outside the rotor 22 as a BLDC motor, a motor having a structure in which the stator 21 is disposed inside the rotor 22 is not excluded.

A motor housing 10 is provided below the motor unit 20 to form a space for accommodating the motor unit 20, and the motor housing 10 has a cylindrical motor mounting portion 11 with an open top. ) And a connection arm 14 radially extending outward from the upper end of the motor installation part 11 and provided at the end of the connection arm 14, having a diameter greater than that of the motor installation part 11 An annular body coupling part 15 having a diameter is provided, and a bearing support part 12 for fixing and supporting the bearing 24 under the motor part 20 is provided at the center of the bottom of the motor installation part 11. It 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 an outer circumferential surface of the bearing 24 .

A bracket 50, a diffuser 40, and a flow generating unit 30 may be provided on the top of the motor unit 20, and the flow generating unit 30 includes an impeller 31 and an impeller cover 33 can include

The bracket 50 may have a central portion 54 aligned with the hole 45 formed in the central portion of the diffuser and a support portion 51 formed in an annular shape and having a wider radius than the central portion 54, , A connection portion 53 connecting the central portion 54 and the support portion 51 may be formed.

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

The diffuser 40 has a hole 45 formed in a central portion, and a plurality of cooling passage outlets 43 are provided along the outer circumferential surface of the hole 45 to provide a passage through which heat generated in the motor unit 20 is discharged. 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 cylindrical portions 412 are formed along the outer circumferential surface of the cylindrical portion 412. Two vanes 42 are provided to guide the flow of air pressurized by the impeller 31 .

The impeller 31 is installed on the top 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 hole 312 is formed in the hub 311 that supports the overall rigidity of the impeller 31, and the hub 311 has a surface that slopes downward as it gradually moves away from the center of rotation in the radial direction, It may be a mixed flow impeller equipped with radial blades 312 .

The impeller cover 33 is provided with an air inlet 331, which is a passage through which air moves, at the upper central portion, and is provided in a downwardly inclined shape based on the air inlet 331, and a cover at the lower end of the impeller cover 33. A coupling portion 342 is provided, and the cover coupling portion 342 is provided in a stepped shape, and the body coupling portion 15 may be fitted into the stepped shape.

Hereinafter, motors according to various embodiments of the present invention will be described with reference to FIGS. 4 to 8 .

Referring to FIG. 4, the motor of this embodiment includes a stator and a rotor provided to rotate with respect to the stator, the stator core 300 forming a back yoke, and the radius of the back yoke Teeth 520, coils 510, and the insulator module 100 coupled to the upper and lower portions of the stator core 300, respectively, and the split core 500 axially inserted into the stator core 300 ) may be included.

In this embodiment, the teeth 520 extend toward the inside of the back yoke in the radial direction (Inner Type), but are not necessarily limited thereto and may extend toward the outside in the radial direction (Outer Type).

In addition, in this embodiment, concentrated winding is applied to the teeth 520, and a tooth split 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 space constraints arise due to the size of the stator core 300, which makes it difficult to fasten the tooth division core with 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 the upper portion of the stator core 300 and a lower insulator module 100L coupled to the lower portion of the stator core 300. The insulator module 100U includes a power terminal unit 110 connected to each phase of the three-phase power supply of the coil 510 and an upper insulator 151 that insulates between the power terminal unit 110 and the stator core 300. ) may be included.

The upper insulator 151 includes a protruding member 153 protruding in a radial direction by a predetermined length and including a guide portion 1531 for guiding insertion of the three-phase power lead 511 of the coil 510. can do.

The upper insulator module (100U) is coupled to the upper portion of the stator core 300 and connects the three-phase power lead line 511 among the lead lines of the coils drawn out from the split core 500. Power terminal unit 110 The upper insulator module 100U may form a first height H1 for insulation between the three-phase power lead 511, the power terminal unit 110, and the stator core 300. have.

The power terminal unit 110 is located above the first height H1 to secure an insulation distance equal to the first height H1. In this embodiment, the power terminal unit 110 It is located on the upper surface of the upper insulator module (100U).

However, it is not necessarily limited to the above-described embodiment, and the power terminal unit 110 may be located inside the upper insulator 151 within the first height H1, in which case the power terminal The unit 110 may form the upper insulator module 100U by using the upper insulator 151 and an insert molding method.

That is, the first height H1 means the height from the bottom to the top of the upper insulator module 100U, and when the power terminal unit 110 is located above the upper insulator 151 as in the present embodiment, When the height of the power terminal unit 110 is not included in the first height H1, but the power terminal unit 110 is located inside the upper insulator module 100U, the power terminal unit 110 The height of the power terminal 113 and the power connection member 112 may be included in the first height H1. Even when the power terminal unit 110 is located inside the upper insulator module 100U, the height of the connection terminal 111 is not included in the first height H1.

In addition, when the power terminal unit 110 is positioned above the upper insulator 100U as in the present embodiment, the power terminal unit 110 may be fixed to the upper insulator module 100U by various methods. have.

For example, grooves and protrusions are formed on the upper surface of the upper insulator module 100U and the lower surface of the power terminal unit 110, respectively, and may be fixed by an interference fit method by press-fit tolerance, or the upper insulator module ( 100U) and the power terminal unit 110 may be fixed to each other by applying a viscous material to a contact portion.

The upper insulator 151 may have a hollow cylindrical shape corresponding to the shape of the stator core 300, and may have a predetermined thickness T corresponding to the thickness T of the back yoke. Preferably, the predetermined thickness T in this embodiment may mean a thickness from an inner circumferential surface to an outer circumferential surface of the stator core 300, and the insulator module 100 coupled to the upper and lower portions of the stator core 300, respectively The thickness of may also be formed the same as the radial thickness of the stator core.

The stator core 300 may be provided in a hollow cylindrical shape in which a space in which the split core 500 is inserted is formed, and a part of the inner and outer circumferential surfaces of the stator core 300 is formed on the stator core 300. ) can be depressed to the inside of the

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

The planar parts 310a and 330a not only reduce the thickness of the stator core 300 in the radial direction to reduce the overall size of the motor, but also act as resistance to magnetic flux flowing through the stator core 300. By removing some parts that can act, it is possible to improve the performance of the motor.

Meanwhile, the shape of the insulator module 100 may be provided to correspond to the shape of the stator core 300, and may be provided in a cylindrical shape with a center penetrating, and the outer circumferential surface of the insulator module 100 may have the flat surface. A flat portion 150a may be formed at a portion in contact with the portions 310a and 330a.

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

Meanwhile, the upper insulator 151 may include a protruding member 153, and the protruding member 153 may protrude toward the inside of the insulator in the radial direction in this embodiment.

The radially inner side means that as the upper insulator module 100U is provided in a hollow cylindrical shape, the upper insulator 151 forms an arc, and the upper insulator module 151 forms an arc in the arc toward the inside of the upper insulator module 100U. By meaning, it may mean the same direction as the radially inner side of the above-mentioned or the back yoke to be described later.

The protruding member 151 may extend radially inward from the upper insulator 151, or form a structure of protrusions and grooves between one end of the protruding member 151 and the inner side of the upper insulator 151. Thus, the protruding member 151 may be fastened in an axial direction or a radial direction of the upper insulator 151 .

In addition, the protruding members 153 may be provided at intervals of 120 degrees in the upper insulator 151, and a guide portion 1531 guiding insertion of the three-phase power lead 511 may be formed. The guide part 1531 will be described later.

Meanwhile, the lower insulator module 100L is coupled to the lower portion of the stator core 300 and includes a neutral terminal unit 130 connected to the neutral point of the coil 510 and the neutral terminal unit 130 and the stator core. (300) may include a lower insulator (155) that insulates between them.

The neutral terminal unit 130 protrudes toward the inner side of the back yoke in the radial direction and has a neutral terminal 131 connected to the neutral point of the coil 510 and a neutral connecting member 132 connecting the neutral terminal 131. ) may be included.

The neutral terminal 131 protrudes toward the inside of the back yoke in a radial direction, may be provided inside the lower insulator module 100L, and may be electrically and physically connected by the neutral connection member 132.

The neutral connection member 132 may be bent to correspond to the shape of the lower insulator module 100L to form a part of the inner surface of the lower insulator module 100L.

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

5A and 5B, the split core 500 of this embodiment is a tooth split core, and is inserted into the stator core 300 based on an axis perpendicular to the radial direction of the stator core 300. can

The tooth 520 may include an insulator 530 that surrounds the tooth 520 and insulates between the coil 510 and the tooth 520, and the insulator 530 is It surrounds the winding part 523 and the outside of the pole shoe 525 and forms a section in which the coil 510 is wound.

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

Because, in the motor of this embodiment, based on the stator core 300, the split core 500 is inserted into the stator core 300 along the axial direction from the lower part of the stator core 300, and the upper insulator The module 100U is a structure located in contact with the upper part of the stator core 300 along the axial direction from the upper part of the stator core 300, and the lower insulator module 100L is positioned at the lower part of the stator core 300. Since it is located in contact with the lower part of the stator core 300 along the axial direction, the three-phase power lead 511 in the insulator module 100 must be wired in the upper insulator module 100U, Since the neutral point lead wire 513 must be wired in the lower insulator module 100L, the lead wires of the coil 510 are drawn in different directions toward the upper and lower portions of the split core 500, respectively. it would be preferable

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

Meanwhile, when the coil 510 is wound in the first direction D1, the winding of the coil 510 proceeds from the outside to the inside of the tooth 520 in the radial direction, and from the top of the tooth 520 Winding starts in a clockwise or counterclockwise direction toward the bottom, and the coil 510 may be wound and connected from the bottom of the tooth 520 toward the top.

In addition, when the coil 510 is wound in the second direction D2, the winding of the coil 510 proceeds from the inside of the tooth 520 toward the outside in the radial direction, and from the top of the tooth 520 Winding starts in a clockwise or counterclockwise direction toward the bottom, and the coil 510 may be wound and connected to the bottom of the tooth 520 toward the top.

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

As a result, even when the coil 510 is wound in any one of the first direction D1 and the second direction D2, the lead wire 511 of the three-phase power supply is radially inside the back yoke. The neutral point lead wire 513 may be drawn toward the lower portion of the tooth 520 from a radially inner side of the back yoke.

Also, the three-phase power lead wire 511 is preferably drawn from a portion located close to the pole shoe 525. Because the power terminal 113 is provided on the upper surface of the protruding member 153 of the upper insulator module 100U, the three-phase power lead 511 is not bent and connected to the power terminal 113. This is to easily connect the three-phase power lead line 511 to the power terminal 113 by directly inserting it.

The neutral terminal 131 is provided inside the lower insulator module 100L, and the neutral point lead 513 can be wired in the radial direction of the white yoke, that is, in the radial direction of the stator core 300.

On the other hand, the tooth 520 has a coupling portion 521 coupled to the coupling groove 331 of the stator core 300 and a winding portion 523 extending in the radial direction of the back yoke from the coupling portion 521 ) and 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 form along an imaginary circumferential surface, and the neutral point lead wire 513 is used to secure insulation performance. For this purpose, a connection may be made between the inner circumferential surface of the stator core 300 and the virtual circumferential surface.

Figure 6a is a perspective view of the upper insulator module of Figure 4, Figure 6b is a perspective view of the upper insulator module according to another embodiment of the present invention, Figure 7 is a cross-sectional view of Figure 6a.

Referring to FIGS. 6A and 6B, as described above, the upper insulator module 100U includes the upper insulator 151 and the power terminal unit 110 to form a flat portion 151a on the outer circumferential surface and has a hollow cylindrical shape. may be provided.

The upper insulator module 100U may form a first height H1 from a lower surface to an upper surface, and the protruding member 153 may extend radially inward from the upper insulator 151. have. Preferably, the protruding members 153 may be formed at intervals of 120 degrees and may extend by a predetermined distance D from the outer circumferential surface of the upper insulator 151 .

The protruding member 153 may form a third height H3, and a fourth height H4 may be formed from the bottom surface of the protruding member 153 to the bottom surface of the upper insulator module 100U. have. Preferably, the sum of the heights of the third height H3 and the fourth height H4 may correspond to the first height H1, which is the height of the upper insulator module 100U. Because the upper insulator module 100U needs to secure an insulation distance of the power terminal unit 110, the sum of the third height H3 and the fourth height H4 is greater than the first height H1. This is because insulation performance may deteriorate if it is small.

The protruding member 153 may extend by a predetermined distance D from the outer circumferential surface of the upper insulator module 100U. The predetermined distance D may correspond to a distance from the outer circumferential surface of the stator core 300 to a portion where the pole shoe 525 extends from the winding part 523, and in detail the three-phase power lead wire ( 511) may be drawn from a portion located close to the pole shoe 525, so it may mean a distance from the stator core 300 to a portion from which the three-phase power lead 511 is drawn.

Accordingly, the three-phase power lead wire 511 can be directly connected to the power terminal 113 without being bent toward the upper portion of the tooth 520 .

The power terminal 113 forms a space 1131 accommodating the three-phase power lead 511, and the space 1131 is a space inside the ring-shaped power terminal 113 as shown in FIG. 6A. It may mean, or, as shown in FIG. 6B, it may mean the inner space of the tong-shaped power terminal 113. The lead wire 511 located in the space 1131 may be connected to the ring-shaped or tong-shaped power terminal 113 in various ways.

For example, the power terminal 113 may be crimped to eliminate the space 1131, or the lead wire 511 may be bent and then connected to the power terminal 113.

That is, FIGS. 6A and 6B represent power terminals 113 having various shapes, and the power terminal of FIG. 6A may be provided in a ring shape, and FIG. 6B may be provided in a tong shape. After the three-phase power lead 511 is located in the space 1131 of the power terminal 113, the power terminal 113 is pressurized to electrically and physically connect with the three-phase power lead 511. can

On the other hand, the power terminal unit 110 includes a power terminal 113 connected to any one of the phases of the three-phase power supply, a connection terminal 111 connected to each phase of the three-phase power supply, and the connection terminal 111 and the connection terminal 111. A power connection member 112 that physically and electrically connects the power terminal 113 may be included. Although not shown in the drawing, the connection terminal 111 is configured to be connected to a circuit board (PCB).

The power terminal unit 110 may be manufactured in a structure in which the power terminal 113 and the store power connection member 112 are injection-molded together and the connection terminal 111 is fixed to the power connection member 112. have. In this case, a hole is formed in the power connection member 112, and the connection terminal 111 may be fixed to the hole by forming a predetermined press-fit tolerance by an interference fit method, or the connection terminal 111 may be It may be welded and fixed to the power connection member 112 .

That is, while the power terminal 113 is formed to facilitate the manufacture of the power terminal unit 110, a margin to which the connection terminal 111 can be fixed is formed, and the margin area is the power supply in this embodiment. It can be described as a connecting member 112.

However, it will be understood that the manufacturing method of the power terminal unit 110 is not limited to the above method, and includes various manufacturing methods for implementing the power terminal unit 110 represented in this embodiment.

On the other hand, referring to FIG. 7, the protruding member 153 is formed with a guide portion 1531, and the guide portion 1531 is provided passing through the top surface from the bottom surface of the protruding member 153, The power terminal 113 may be provided above the guide part 1531 .

The cross section of the guide part 1531 may be formed such that the width of the cross section becomes smaller along the direction (i) in which the three-phase power supply lead 511 is inserted, or the guide part 1531 may be formed by the protruding member. It is provided in the shape of a hole penetrating through 153 so that the circumference of the circumference becomes smaller along the direction in which the three-phase power lead wire 511 is inserted.

Since the power terminal 113 is provided at the top of the guide part 1531, the shape of the guide part 1531 guides the three-phase power lead 511 to be connected to the power terminal 113. It expresses various shapes that can be formed, and the various shapes may include not only the above-described contents but also those provided with hollow holes corresponding to the diameter of the three-phase power lead 511.

Meanwhile, for smooth guidance of the three-phase power lead 511, the power terminal 113 may be provided above the guide part 1531, and the power connection member 112 and the connection terminal 111 ) may be provided on the upper part of the protruding member 153 out of the insertion direction (i) of the three-phase power lead 511. That is, the space 1131 of the power terminal 113 forms a space communicating with the guide part 1531, and the lower surface of the space 1131 may include the upper surface of the guide part 1531. have.

Fig. 8 is an exploded and cross-sectional view of the lower insulator module of Fig. 4;

Referring to FIG. 8, the lower insulator module 100L of this embodiment is coupled to the lower part of the stator core 300, and to secure an insulation distance between the stator core 300 and the neutral terminal unit 130, a second A height H2 may be formed and a predetermined thickness T toward the radial direction may be formed.

In addition, the lower insulator module 100L may also have a hollow cylindrical shape corresponding to the shape of the stator core 300, and like the upper insulator module 100U, a flat portion 155a may be formed on an outer circumferential surface. have.

The neutral terminal 131 may be provided in a hook shape, and includes an extension 1311 protruding from the neutral connection member 132 toward the inside of the lower insulator module 100L and one end of the extension 1311. may include a ring portion 1313 bent toward the inner circumferential surface of the lower insulator module 100L.

However, the shape of the neutral terminal 131 is not limited to the extension part 1311 and the ring part 1313, and is formed inside the lower insulator module 100L so that the neutral point lead wire 513 It may include various protruding shapes that may be wired inside the lower insulator module 100L.

The upper surface 132u of the neutral connection member may form a first thickness T1, and the first thickness T1 is smaller than the thickness T of the lower insulator module. Therefore, the neutral connection member 132 may be provided in the seating groove 152 formed on the inner surface of the lower insulator module 100L.

The seating groove 152 has a thickness corresponding to the first thickness T1 and a depth smaller than the height H2 of the lower insulator module 100L, so that the neutral connection member 132 is connected to the lower insulator 155. ) can be located surrounded by

In the present embodiment, the side surface 132s of the neutral connection member forms a part of the inner surface of the lower insulator module 100L, but it is not necessarily limited to this shape, and the side surface 132s also forms the lower insulator module (100L). 155) may be provided to wrap.

Therefore, the cross section of the lower insulator module 100L may be formed by crossing and stacking the neutral terminal unit 130 and the lower insulator 155, and the lower insulator 155 is provided on the lowermost and uppermost layers in the cross section, The neutral terminal unit 130 may be provided in the middle layer. Of course, since the seating groove 152 in which the neutral terminal unit 130 is seated is formed in the middle layer, the lower insulator 155 may be provided in the middle layer except for the neutral terminal unit 130. .

The lower insulator module 100L may be manufactured by an insert injection method, or may be manufactured by stacking components constituting each layer on a cross-section.

Meanwhile, looking at the connection relationship between the insulator module 100, the stator core 300, and the split core 500, the three-phase power lead 511 has a coil 510 at the top of the teeth 520. It is drawn out in the axial direction and connected to the power terminal 113.

The neutral point lead wire 513 may be connected to the neutral terminal 131 after the coil 510 is drawn from the lower portion of the tooth 520 and bent. The neutral terminal 131 may include an extension 1313 extending from the neutral connection member 132 toward the inner side in the radial direction of the back yoke and a hook 1311 bent from the extension 1313. The extension part 1313 may extend toward the inner side of the back yoke in the radial direction from a position where an insulation distance from the coil 510 is secured, and the ring part 1311 is each of the split teeth. It is preferable to be formed by bending toward the opposite side of the adjacent split teeth. Therefore, the neutral point lead wire 513 is connected to the ring part 1311 to secure an insulation distance from the coil 510 located inside the stator core 300.

As a result, the three-phase power lead 511 can be wired within the radius of the white yoke, and in detail, as the protruding member 153 extends radially inward of the upper insulator 151, the protruding member ( 153) and the three-phase power lead 511 may be connected within a radius of the white yoke.

In addition, the neutral point lead wire 513 may also be wired within the radius of the white yoke, and in detail, the lower insulator module 100L has a shape corresponding to the cylindrical shape of the stator core 300 and the snettier core ( 300) forms the second height H2, so the neutral point lead wire 513 is wired inside the lower insulator module 100L, and at the same time, the neutral terminal 131 located within the second height H2. ) can be wired to

That is, both the lead wires 511 and 513 are wired within the radius of the white yoke, and insulation performance can be secured by the structural characteristics of the insulator module 100 . Therefore, the outer diameter of the stator can be reduced, and the radial thickness of the back yoke can be formed thin, so that the motor can be reduced in size and weight, and at the same time, insulation performance can be secured.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications are possible to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments and should not be defined, and should be defined by not only the claims to be described later, but also those equivalent to these 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 153: protruding member
1531: guide unit
130: neutral terminal unit 131: neutral terminal
132: neutral connection member 155: lower insulator
300: stator core
500: split core
510: Coil 511: 3-phase power lead
513: Neutral point lead wire 520: Teeth

Claims (20)

A motor comprising a stator and a rotor provided to rotate with respect to the stator,
The stator is
a stator core forming a back yoke;
teeth extending from the back yoke;
coil; and
An upper insulator module coupled to an upper portion of the stator core; includes,
The upper insulator module,
a power terminal unit connected to each phase of the three-phase power supply of the coil; and
Including; an upper insulator for insulating between the power terminal unit and the stator core;
The upper insulator,
and a protruding member including a guide portion protruding from the upper insulator, on which at least a part of the power terminal unit is disposed, and guiding insertion of the three-phase power lead of the coil. According to claim 1,
The motor, characterized in that the width of the cross section of the cross section of the guide portion decreases along the direction in which the three-phase power lead is inserted. According to claim 1,
The motor characterized in that the guide portion is provided in the shape of a hole penetrating the protruding member so that a circumference of the circumference decreases along a direction in which the three-phase power lead wire is inserted. According to any one of claims 2 or 3,
The power terminal unit,
The motor characterized in that it comprises a; power terminal provided on the upper portion of the protruding member and connected to the three-phase power outgoing line of the coil passing through the guide. According to claim 4,
The power terminal is a motor, characterized in that provided on the upper portion of the guide portion. According to claim 1,
The power terminal unit,
A connection terminal connected to the power terminal and connected to one of the three-phase power sources of the coil,
The motor, characterized in that the connection terminal is provided on the upper portion of the protruding member. According to claim 4,
A motor, characterized in that the lead wire of the three-phase power supply of the coil is drawn toward the guide portion and connected to the power terminal. According to claim 1,
The stator is
A lower insulator module coupled to the lower portion of the stator core; includes,
The lower insulator module,
a neutral terminal unit connected to the neutral point of the coil; and
and a lower insulator for insulating between the neutral terminal unit and the stator core. According to claim 8,
The neutral terminal unit,
a neutral terminal protruding in the radial direction of the back yoke and connected to a neutral point of the coil; and
A motor comprising a; neutral connection member connecting the neutral terminal. According to claim 9,
The motor, characterized in that the neutral connection member forms a part of the inner surface of the lower insulator module. According to claim 9,
The neutral terminal is formed at the same height as the lower insulator module. According to claim 8,
The motor, characterized in that the neutral lead wire of the coil is connected to the neutral terminal inside the lower insulator module. A motor comprising a stator and a rotor provided to rotate with respect to the stator,
The stator is
A stator core including a surface forming a back yoke and a groove formed along a circumference of the surface;
a tooth including a coupling portion coupled to the groove and a winding portion extending from the coupling portion to the back yoke;
a coil wound around the teeth;
an upper insulator module coupled to an upper portion of the stator core; and
A lower insulator module coupled to the lower portion of the stator core; includes,
The upper insulator module,
a power terminal unit connected to each phase of the three-phase power supply of the coil; and
Including; an upper insulator for 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
And a lower insulator for insulating between the neutral terminal unit and the stator core,
The motor, characterized in that the three-phase power lead wire of the coil and the neutral point lead wire of the coil are drawn in different directions and connected to the power terminal unit and the neutral terminal unit, respectively. According to claim 13,
The power terminal unit includes a power terminal connected to the three-phase power lead of the coil;
The neutral terminal unit includes a neutral terminal connected to the neutral point lead wire of the coil;
The one surface of the stator core corresponds to the inner surface of the stator core,
The motor, characterized in that the power terminal and the neutral terminal are provided radially inner side of the back yoke. According to claim 14,
The upper insulator,
A protruding member protruding a predetermined length toward the inside of the upper insulator in a radial direction;
The power terminal is a motor, characterized in that connected to the protruding member. According to claim 15,
The protruding member,
A guide portion formed through the protruding member to guide insertion of the three-phase power lead wire of the coil;
The motor, characterized in that the power terminal is provided on the upper portion of the guide portion. According to claim 14,
The neutral terminal unit,
A neutral terminal protruding inward in the radial direction of the back yoke; and
A motor comprising a; neutral connection member connecting the neutral terminal. According to claim 17,
The cross section of the module of the lower insulator is formed by crossing and stacking the neutral terminal unit and the lower insulator. According to claim 18,
The neutral terminal is formed at the same height as the lower insulator module. According to claim 13,
The motor, characterized in that the three-phase power lead wire of the coil is drawn toward the upper portion of the tooth, and the neutral point lead wire of the coil is drawn toward the lower portion of the tooth.

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