Stator assembly for motor, motor and household appliance

Abstract

The invention relates to the technical field of household appliances, and discloses a stator assembly for a motor, the motor and a household appliance. The motor comprises a rotor, the rotor is provided with a first rotating shaft and a second rotating shaft which are oppositely arranged, the stator assembly comprises a stator, the stator comprises an inner shell, the inner shell is spherical, the inner shell is provided with a first shaft hole and a second shaft hole through which the first rotating shaft and the second rotating shaft penetrate, the inner shell is provided with a plurality of winding grooves, and the winding grooves are divided into multiple groups; the multiple groups of winding grooves are sequentially arranged in the connecting line direction of the first shaft hole and the second shaft hole; the windings are wound around the winding grooves, and the number of the windings is equal to that of the winding grooves and the windings and the winding grooves are in one-to-one correspondence. By arranging the multiple groups of winding grooves and arranging the multiple groups of winding grooves around the connecting line direction of the first shaft hole and the second shaft hole in sequence, the magnetic field generated after the winding is electrified can drive the rotor to rotate, and the rotor structure, namely the motor structure, is simple by adopting the mode.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular, to a stator assembly for a motor, a motor, and a household appliance. Background Art

[0002] Compared with the structure of traditional motors, spherical motors are more compact, efficient, high-precision, and high-torque. At the same time, due to their simple internal structure, they have low self-rotation vibration and relatively low manufacturing costs, becoming a research hotspot in the fields of mobile robots, smart homes, medical devices, etc.

[0003] A related technology discloses a hybrid stepping motor with a U-shaped permanent magnet embedded in the stator. It includes a stator and a rotor both composed of stacked silicon steel sheets; a number of rotor teeth are evenly distributed on the outer circumference of the rotor; the rotor includes a rotor core and a rotating shaft; the stator includes a stator core, a stator winding, a permanent magnet, and insulation. Magnetic poles are distributed on the inner circumference of the stator core, and 5 small teeth with the same pitch as the rotor teeth are distributed on each pole shoe; a phase of stator winding is installed on each pole shoe; permanent magnet slots are provided on the yoke of the stator core every 2 magnetic poles, and permanent magnets are placed in the slots, with their N and S closely attached to the corresponding magnetic poles respectively, and the permanent magnets are arranged alternately in a certain order. The corresponding phase of stator windings on the first stator pole, the second stator pole, the third stator pole, the fourth stator pole, the fifth stator pole, the sixth stator pole, the seventh stator pole, and the eighth stator pole are successively represented as A, B, -A, -B, -A, -B, A, B. The A-phase coil on the first stator pole is reversely connected in series with the -A-phase coil on the third stator pole, and then reversely connected in series with the -A-phase coil on the fifth stator pole, and then forwardly connected in series with the A-phase coil on the seventh stator pole to form the A-phase winding of the motor stator. The B-phase coil on the second stator pole is reversely connected in series with the -B-phase coil on the fourth stator pole, and then reversely connected in series with the -B-phase coil on the sixth stator pole, and then forwardly connected in series with the B-phase coil on the eighth stator pole to form the B-phase winding of the motor stator.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related technologies:

[0005] The motor structure in the related technology is complex.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] Embodiments of the present disclosure provide a stator assembly for an electric motor, an electric motor, and a household appliance to solve the problem of complex structure of the electric motor in the related art.

[0009] According to a first aspect of an embodiment of the present invention, there is provided a stator assembly for an electric motor. The electric motor includes a rotor provided with a first rotating shaft and a second rotating shaft arranged opposite to each other. The stator assembly includes: a stator including an inner shell in a spherical shape. The inner shell is provided with a first shaft hole and a second shaft hole respectively for the first rotating shaft and the second rotating shaft to pass through. The inner shell is provided with a plurality of winding grooves. The plurality of winding grooves are divided into multiple groups, and the multiple groups of winding grooves are arranged in sequence around the connecting line direction of the first shaft hole and the second shaft hole; a winding wound around the winding grooves, and the number of groups of the winding is equal to and corresponds one by one to the number of groups of the winding grooves.

[0010] The multiple winding grooves are divided into multiple groups of winding grooves, and each group of winding grooves includes at least one winding groove. One group of coil windings is wound in each group of winding grooves. The multiple groups of winding grooves are arranged in sequence around the circumferential direction of the spherical inner shell and are arranged in sequence around the connecting line direction of the first shaft hole and the second shaft hole. Then, the magnetic field direction generated by the energization of the coil windings is not parallel to the connecting line direction of the first shaft hole and the second shaft hole, for example, perpendicular or nearly perpendicular, that is, not parallel to the axes of the first rotating shaft and the second rotating shaft. Thus, the magnetic field generated by the energization of the coil windings can drive the rotor to rotate around the axes of the first rotating shaft and the second rotating shaft, realizing the operation of the electric motor.

[0011] By providing multiple groups of winding grooves and arranging the multiple groups of winding grooves in sequence around the connecting line direction of the first shaft hole and the second shaft hole, the magnetic field generated after the winding is energized can drive the rotor to rotate. This method simplifies the rotor structure, that is, simplifies the structure of the electric motor.

[0012] Optionally, the number of groups of winding grooves is four groups. The four groups of winding grooves are respectively the first to fourth groups of winding grooves. The winding includes the first to fourth groups of windings, and the first to fourth groups of windings are respectively wound in the first to fourth groups of winding grooves; in the first mode, the first group of winding and the third group of winding are adapted to conduct current in a first direction, and the second group of winding and the fourth group of winding are adapted to conduct current in a second direction; in the second mode, the first group of winding and the second group of winding are adapted to conduct current in a first direction, and the third group of winding and the fourth group of winding are adapted to conduct current in a second direction; in the third mode, the first group of winding and the third group of winding are adapted to conduct current in a second direction, and the second group of winding and the fourth group of winding are adapted to conduct current in a first direction; in the fourth mode, the first group of winding and the second group of winding are adapted to conduct current in a second direction, and the second group of winding and the fourth group of winding are adapted to conduct current in a first direction; wherein, the first direction and the second direction are opposite.

[0013] Energize according to the above rules. Depending on the direction of energization, the stator magnetic flux alternates, generating a periodic waveform. By reasonably designing the drive control scheme according to this waveform, the periodic operation of the motor can be achieved. By reasonably designing the duty cycle of the waveform, the speed of the motor can be controlled, thereby realizing the forward and reverse rotation of the rotor at a constant or variable speed inside the stator.

[0014] Optionally, the central angles corresponding to the multiple sets of winding grooves on the cross-section of the inner shell are equal and are evenly arranged on the inner shell, wherein the connection line between the first shaft hole and the second shaft hole is perpendicular to the cross-section.

[0015] This setting enables the magnetic field forces generated by each group of windings to be relatively balanced when current is passed through the multiple groups of windings. Thus, the acting forces of the magnetic field forces generated by each group of windings on the rotor are relatively balanced, making the rotation of the rotor smoother.

[0016] Optionally, at least one group of winding grooves includes multiple winding grooves, and the multiple winding grooves in the at least one group of winding grooves are arranged in sequence along the direction from the first shaft hole to the second shaft hole.

[0017] The multiple winding grooves in the same group are arranged in sequence along the direction from the first shaft hole to the second shaft hole. This setting method can make full use of the space on the surface of the spherical inner shell, increase the length of the energized coil in the winding, and enhance the driving force on the rotor.

[0018] Optionally, an insulating material is provided between adjacent two groups of winding grooves.

[0019] This setting can prevent the windings of adjacent two groups of winding grooves from interfering with each other and improve the use safety of the motor.

[0020] Optionally, the stator further includes: an outer shell sleeved on the outside of the inner shell, and the outer shell and the inner shell are fixed by means of vacuum pumping and potting.

[0021] The method of vacuum pumping and potting is to pot the glue between the inner shell and the outer shell and then pump the vacuum of the potted glue to remove the bubbles in the glue, which can prevent the bubbles from affecting the magnetic field inside the motor and can enhance the strength of the glue, thereby enhancing the connection strength between the inner shell and the outer shell.

[0022] According to the second aspect of the embodiments of the present invention, there is provided a motor, including: a stator assembly for a motor as described in any one of the above embodiments; a rotor disposed inside the inner shell, the rotor being provided with a relatively arranged first rotating shaft and a second rotating shaft, the first rotating shaft being disposed in the first shaft hole, and the second rotating shaft being disposed in the second shaft hole.

[0023] The motor provided by the embodiments of the second aspect of the present application includes the stator assembly for a motor as described in any one of the above embodiments, and thus has all the beneficial effects of the stator assembly for a motor as described in any one of the above embodiments, which will not be repeated here.

[0024] Optionally, the rotor is spherical, and the outer spherical surface of the rotor includes a first region and a second region which are oppositely arranged. The motor further includes: a first permanent magnet covering the first region; a second permanent magnet covering the second region; wherein, the magnetic fields generated by the first permanent magnet and the second permanent magnet are not parallel to the first rotating shaft.

[0025] The axes of the first rotating shaft and the second rotating shaft coincide. Therefore, the magnetic fields generated by the first permanent magnet and the second permanent magnet are not parallel to the first rotating shaft and are also not parallel to the second rotating shaft, so that the rotor can rotate relative to the stator around the first rotating shaft and the second rotating shaft.

[0026] Optionally, the motor further includes: a first bearing, and the first rotating shaft is rotationally connected to the stator through the first bearing; and / or a second bearing, and the second rotating shaft is rotationally connected to the stator through the second bearing.

[0027] The first bearing and the second bearing are respectively used to realize the rotational connection between the first rotating shaft and the stator and between the second rotating shaft and the stator. This connection method has low cost and high reliability.

[0028] According to the third aspect of the embodiments of the present invention, there is provided a household appliance including the motor as described in any one of the above embodiments.

[0029] The household appliance provided by the embodiments of the third aspect of the present application includes the motor as described in any one of the above embodiments, and thus has all the beneficial effects of the motor as described in any one of the above embodiments, which will not be elaborated herein.

[0030] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings

[0031] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0032] Figure 1 is a schematic structural view of a first perspective of a motor provided by an embodiment of the present disclosure;

[0033] Figure 2 is a schematic structural view of a second perspective of another motor provided by an embodiment of the present disclosure;

[0034] Figure 3 is Figure 2 a cross-sectional view taken along the line A-A in

[0035] Figure 4 is Figure 2 a cross-sectional view taken along the line B-B in

[0036] Figure 5 It is a schematic diagram of the first perspective of an assembly structure of a rotor and an inner shell provided by an embodiment of the present disclosure;

[0037] Figure 6 It is a schematic diagram of the second perspective of an assembly structure of a rotor and an inner shell provided by an embodiment of the present disclosure;

[0038] Figure 7 It is a schematic diagram of the third perspective of an assembly structure of a rotor and an inner shell provided by an embodiment of the present disclosure;

[0039] Figure 8 It is a schematic diagram of the first perspective of an assembly structure of a rotor and an inner shell after removing the winding provided by an embodiment of the present disclosure;

[0040] Figure 9 It is a schematic diagram of the second perspective of an assembly structure of a rotor and an inner shell after removing the winding provided by an embodiment of the present disclosure;

[0041] Figure 10 It is a schematic diagram of the first perspective of a rotor provided by an embodiment of the present disclosure;

[0042] Figure 11 It is a schematic diagram of the second perspective of a rotor provided by an embodiment of the present disclosure;

[0043] Figure 12 It is a schematic diagram of the fourth perspective of an assembly structure of a rotor and an inner shell provided by an embodiment of the present disclosure;

[0044] Figure 13 is Figure 12 a cross-sectional view taken along the C-C direction in;

[0045] Figure 14 is Figure 12 a cross-sectional view taken along the D-D direction in;

[0046] Figure 15 It is a schematic diagram of an inner shell after removing the winding provided by an embodiment of the present disclosure.

[0047] Reference numerals:

[0048] 100, motor; 10, rotor; 101, rotor core; 102, first rotating shaft; 103, second rotating shaft; 104, first region; 105, second region;

[0049] 201, first permanent magnet; 202, second permanent magnet;

[0050] 30. Stator; 301. Inner shell; 3011. First set of winding grooves; 3012. Second set of winding grooves; 3013. Third set of winding grooves; 3014. Fourth set of winding grooves; 3015. Winding groove; 3016. First winding protrusion; 3017. Second winding protrusion; 3018. Third winding protrusion; 3019. First set of windings; 3020. Second set of windings; 3021. Third set of windings; 3022. Fourth set of windings; 3023. First shaft hole; 3024. Second shaft hole; 3025. Winding protrusion; 3026. First set of winding protrusions; 3027. Second set of winding protrusions; 3028. Third set of winding protrusions; 3029. Fourth set of winding protrusions; 3030. Windings; 302. Outer shell; 3021. First bearing mounting seat; 3022. Second bearing mounting seat; 3023. Mounting seat; 3024. Third shaft hole; 3025. Fourth shaft hole;

[0051] 401. First bearing; 402. Second bearing;

[0052] 50. Air gap. Detailed implementation manners

[0053] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner to simplify the drawings.

[0054] The terms "first", "second", etc. in the description and claims of the embodiments of the present disclosure and the above accompanying drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to describe the embodiments of the present disclosure here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0055] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", and "rear" is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated device, element, or component must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0056] In addition, the terms "arrangement", "connection", and "fixation" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0057] Unless otherwise specified, the term "plurality" means two or more.

[0058] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are an "or" relationship. For example, A / B means: A or B.

[0059] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A, or B, or A and B these three relationships.

[0060] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0061] Combined Figures 1-15 As shown, the embodiments of the present disclosure provide a stator assembly for a motor 100. The motor 100 includes a rotor 10. The rotor 10 is provided with a first rotating shaft 102 and a second rotating shaft 103 that are oppositely arranged. The stator assembly includes a stator 30 and a winding 3030.

[0062] As Figures 5 to 9 、As Figures 12 to 15As shown, the stator 30 includes an inner shell 301. The inner shell 301 is spherical. The inner shell 301 is provided with a first shaft hole 3023 and a second shaft hole 3024 through which the first rotating shaft 102 and the second rotating shaft 103 pass out respectively. The inner shell 301 is provided with a plurality of wire winding grooves 3015. The plurality of wire winding grooves 3015 are divided into multiple groups, and the multiple groups of wire winding grooves 3015 are arranged in sequence around the connecting line direction of the first shaft hole 3023 and the second shaft hole 3024.

[0063] The winding 3030 is wound around the wire winding grooves 3015. The number of groups of the winding is equal to and corresponds one by one with the number of groups of the wire winding grooves 3015. Among them, the winding is composed of energized coils.

[0064] As Figure 10 and Figure 11 shown, the rotor 10 is provided with a first rotating shaft 102 and a second rotating shaft 103. The first rotating shaft 102 passes out of the inner shell 301 through the first shaft hole 3023, and the second rotating shaft 103 passes out of the inner shell 301 through the second shaft hole 3024. The rotor 10 rotates relative to the inner shell 301 around the axes of the first rotating shaft 102 and the second rotating shaft 103, realizing the operation of the motor 100.

[0065] The multiple wire winding grooves 3015 are divided into multiple groups of wire winding grooves 3015. Each group of wire winding grooves 3015 includes at least one wire winding groove 3015. A group of coil windings is wound in each group of wire winding grooves 3015. The multiple groups of wire winding grooves 3015 are arranged in sequence around the circumferential direction of the spherical inner shell 301 and are arranged in sequence around the connecting line direction of the first shaft hole 3023 and the second shaft hole 3024. Then the magnetic field direction generated by the energized coil windings is not parallel to the connecting line direction of the first shaft hole 3023 and the second shaft hole 3024, for example, perpendicular or nearly perpendicular, that is, not parallel to the axes of the first rotating shaft 102 and the second rotating shaft 103. Thus, the magnetic field generated by the energized coil windings can drive the rotor 10 to rotate around the axes of the first rotating shaft 102 and the second rotating shaft 103, realizing the operation of the motor 100. Among them, the connecting line direction of the first shaft hole and the second shaft hole is the axis direction of the first rotating shaft or the axis direction of the second rotating shaft.

[0066] By arranging multiple groups of wire winding grooves 3015 and arranging the multiple groups of wire winding grooves 3015 in sequence around the connecting line direction of the first shaft hole 3023 and the second shaft hole 3024, the magnetic field generated after the winding is energized can drive the rotor 10 to rotate. This method makes the structure of the rotor 10 simple, that is, the structure of the motor 100 is simple.

[0067] Optionally, as Figures 1 to 15 shown, the number of groups of the wire winding protrusions 3025 is four groups, which are the first group of wire winding protrusions 3026, the second group of wire winding protrusions 3027, the third group of wire winding protrusions 3028, and the fourth group of wire winding protrusions 3029. The number of groups of the wire winding grooves 3015 is four groups. The four groups of wire winding grooves 3015 are the first to fourth groups of wire winding grooves 3014 respectively, as Figure 6As shown, the winding includes first to fourth groups of windings 3022, which are respectively wound in first to fourth groups of winding slots 3014, that is, the first group of windings 3019 is wound in the first group of winding slots 3011, the second group of windings 3020 is wound in the second group of winding slots 3012, the third group of windings 3021 is wound in the third group of winding slots 3013, and the fourth group of windings 3022 is wound in the fourth group of winding slots 3014.

[0068] The operating modes of the motor 100 include first to fourth modes.

[0069] In the first mode, currents suitable for flowing in a first direction are adapted to be passed through the first group of windings 3019 and the third group of windings 3021, and currents suitable for flowing in a second direction are adapted to be passed through the second group of windings 3020 and the fourth group of windings 3022.

[0070] In the second mode, currents suitable for flowing in a first direction are adapted to be passed through the first group of windings 3019 and the second group of windings 3020, and currents suitable for flowing in a second direction are adapted to be passed through the third group of windings 3021 and the fourth group of windings 3022.

[0071] In the third mode, currents suitable for flowing in a second direction are adapted to be passed through the first group of windings 3019 and the third group of windings 3021, and currents suitable for flowing in a first direction are adapted to be passed through the second group of windings 3020 and the fourth group of windings 3022.

[0072] In the fourth mode, currents suitable for flowing in a second direction are adapted to be passed through the first group of windings 3019 and the second group of windings 3020, and currents suitable for flowing in a first direction are adapted to be passed through the second group of windings 3020 and the fourth group of windings 3022. Among them, the first direction and the second direction are opposite.

[0073] By energizing according to the above rules, the stator 30 magnetic flux alternates according to the different energizing directions, generating a periodic waveform. By reasonably designing a drive control scheme according to this waveform, the periodic operation of the motor 100 can be achieved. By reasonably designing the duty cycle of the waveform, the speed of the motor 100 can be controlled, so as to realize the uniform or variable speed forward and reverse rotation of the rotor 10 inside the stator 30.

[0074] The first group of windings 3019 to the fourth group of windings 3022 are respectively controlled by the first to fourth power supplies. The first power supply controls the magnitude and / or direction of the current passed through the first group of windings 3019, the second power supply controls the magnitude and / or direction of the current passed through the second group of windings 3020, the third power supply controls the magnitude and / or direction of the current passed through the third group of windings 3021, and the fourth power supply controls the magnitude and / or direction of the current passed through the fourth group of windings 3022.

[0075] The windings are wound along the outer surface of the stator 30 on the inner shell 301. When currents in different directions are passed through the windings, uniform magnetic fields in different directions can be generated. In the first mode, the regions where the first group of windings 3019 and the third group of windings 3021 are located are the S poles (negative), and the regions where the second group of windings 3020 and the fourth group of windings 3022 are located are the N poles (positive). In the second mode, the regions where the first group of windings 3019 and the second group of windings 3020 are located are the S poles (negative), and the regions where the third group of windings 3021 and the fourth group of windings 3022 are located are the N poles (positive). In the third mode, the regions where the first group of windings 3019 and the third group of windings 3021 are located are the N poles (positive), and the regions where the third group of windings 3021 and the fourth group of windings 3022 are located are the S poles (negative). In the fourth mode, the regions where the first group of windings 3019 and the second group of windings 3020 are located are the N poles (positive), and the regions where the third group of windings 3021 and the fourth group of windings 3022 are located are the S poles (negative).

[0076] Optionally, at least one set of winding grooves 3015 includes a plurality of winding grooves 3015, and the plurality of winding grooves 3015 in the at least one set of winding grooves 3015 are arranged in sequence along the direction from the first shaft hole 3023 to the second shaft hole 3024.

[0077] As Figure 9 shown, the plurality of winding grooves 3015 in the same group are arranged in sequence along the direction from the first shaft hole 3023 to the second shaft hole 3024. This arrangement can make full use of the space on the surface of the spherical inner shell 301, increase the length of the energized coils in the windings, and enhance the driving force on the rotor 10.

[0078] As Figure 9As shown, the outer surface of the spherical inner shell 301 is provided with winding protrusions 3025. The grooves formed around the winding protrusions 3025 become winding grooves 3015. The number of winding protrusions 3025 is multiple, and the multiple winding protrusions 3025 are divided into multiple groups. The number of groups is the same as and corresponds one by one to the number of groups of the winding grooves 3015, that is, one group of winding protrusions 3025 forms one group of winding grooves 3015. Each group of winding grooves 3015 is formed by three winding grooves 3015 formed by three winding protrusions 3025. Taking the number of groups of the winding grooves 3015 as four as an example, the number of groups of the winding protrusions 3025 is four, which are the first to the fourth groups of winding protrusions 3025 respectively. The coil is wound around the periphery of one or more winding protrusions 3025. Specifically, taking the three winding protrusions 3025 forming each group of winding grooves 3015 as the first to the third winding protrusions 3018 (the first to the third winding protrusions 3018 are arranged in sequence along the connection direction of the first shaft hole 3023 and the second shaft hole 3024) as an example, the coil is first wound around the first winding protrusion 3016, then around the second winding protrusion 3017, and then around the third winding protrusion 3018. This is the form in which the coil is wound around the periphery of the first winding protrusion 3016. It can also be that the coil is wound around the periphery of the first winding protrusion 3016 and the second winding protrusion 3017. At this time, there is no coil in the part of the winding groove 3015 between the first winding protrusion 3016 and the second winding protrusion 3017. Or, the coil is wound around the periphery of the first winding protrusion 3016, the second winding protrusion 3017 and the third winding protrusion 3018 at the same time. There is no coil in the part of the winding groove 3015 between the first winding protrusion 3016 and the second winding protrusion 3017, and there is no coil in the part of the winding groove 3015 between the second winding protrusion 3017 and the third winding protrusion 3018.

[0079] The shapes and sizes of the first to the third winding protrusions 3018 can be flexibly set according to the size of the inner shell 301 and the number of groups of the winding grooves 3015, and are not limited herein.

[0080] The number of the winding grooves 3015 in multiple groups of winding grooves 3015 is equal and corresponds one by one. One-to-one correspondence means that the corresponding winding grooves 3015 in multiple groups of winding grooves 3015 are located on the same cross-section of the inner shell 301, and this cross-section is perpendicular to the connection direction of the first shaft hole 3023 and the second shaft hole 3024, so that the force received by the rotor 10 during rotation is more stable, and thus the rotation of the rotor 10 is more stable.

[0081] The windings in the same group of winding grooves 3015 are energized with the same-direction current.

[0082] Optionally, the central angles corresponding to the multiple groups of winding grooves 3015 on the cross-section of the inner shell 301 are equal, wherein the cross-section is perpendicular to the connection direction of the first shaft hole 3023 and the second shaft hole 3024.

[0083] This setting enables the magnetic field forces generated by each group of windings to be relatively balanced when current is passed through multiple groups of windings. As a result, the acting forces of the magnetic field forces generated by each group of windings on the rotor 10 are relatively balanced, making the rotation of the rotor 10 smoother.

[0084] Optionally, an insulating material is provided between adjacent pairs of winding grooves 3015.

[0085] This setting can prevent the windings in adjacent pairs of winding grooves 3015 from interfering with each other and improve the usage safety of the motor 100.

[0086] Optionally, as Figures 1 to 4 shown, the stator 30 further includes a housing 302, an inner housing 301 is disposed inside the housing 302, and the inner housing 301 and the housing 302 are fixed by a method of vacuum pumping and potting.

[0087] The method of vacuum pumping and potting is to pot the glue between the inner housing 301 and the housing 302 and then vacuum pump the potted glue to remove the air bubbles in the glue. This can prevent the air bubbles from affecting the magnetic field inside the motor 100 and can also enhance the strength of the glue, thereby enhancing the connection strength between the inner housing 301 and the housing 302.

[0088] The housing 302 can be spherical or various shapes such as a cuboid.

[0089] The inner housing 301 is made of a magnetic conductive material to ensure that the magnetic force lines generated after the windings are energized can generate a closed magnetic field in the stator 30. Since the windings are distributed in a "spherical" shape in the stator 30, the generated magnetic field is also evenly distributed around the cross-sectional circle.

[0090] The housing 302 is provided with a mounting seat 3023 for mounting the stator assembly on a mounting base.

[0091] The number of mounting seats 3023 is one or more, and the mounting seats 3023 and the mounting base can be fixed by processes such as screw connection and welding.

[0092] An embodiment of the second aspect of the present application provides a motor 100, as Figures 1 to 4 shown, including a stator assembly and a rotor 10 for the motor 100 as described in any one of the above embodiments, wherein the rotor 10 is disposed inside the inner housing 301.

[0093] The motor 100 provided by the embodiment of the second aspect of the present application includes a stator assembly for the motor 100 as described in any one of the above embodiments, and thus has all the beneficial effects of the stator assembly for the motor 100 as described in any one of the above embodiments, which will not be elaborated here.

[0094] The rotor 10 is spherical, and the inner shell 301 of the stator 30 is also spherical. The centers of the two spheres coincide, and there is an air gap 50 between the inner shell 301 and the rotor 10.

[0095] Optionally, as Figure 10 and Figure 11 shown, the rotor 10 is spherical, and the outer surface of the sphere includes a relatively arranged first region 104 and a second region 105. The motor 100 further includes permanent magnets, and the number of permanent magnets is multiple. The multiple permanent magnets include a first permanent magnet 201 and a second permanent magnet 202.

[0096] The first permanent magnet 201 covers the first region 104; the second permanent magnet 202 covers the second region 105, and the magnetic fields generated by the first permanent magnet 201 and the second permanent magnet 202 are not parallel to the first rotating shaft 102.

[0097] The axes of the first rotating shaft 102 and the second rotating shaft 103 coincide. Therefore, the magnetic fields generated by the first permanent magnet 201 and the second permanent magnet 202 are not parallel to the first rotating shaft 102 and are also not parallel to the second rotating shaft 103, so that the rotor 10 can rotate relative to the stator 30 around the first rotating shaft 102 and the second rotating shaft 103.

[0098] Optionally, the magnetic fields generated by the first permanent magnet 201 and the second permanent magnet 202 are perpendicular or nearly perpendicular to the first rotating shaft 102.

[0099] As Figure 10 and Figure 11 shown, the first region 104 and the second region 105 are respectively located on opposite sides of the axis of the first rotating shaft 102. It can be understood that the positions of the first region 104 and the second region 105 can also change. For example, the first rotating shaft 102 passes through the first region 104, and the second rotating shaft 103 passes through the second region 105, that is, the first rotating shaft 102 passes through the first permanent magnet 201, and the second rotating shaft 103 passes through the second permanent magnet 202.

[0100] The number of permanent magnets can be two, namely the first permanent magnet 201 and the second permanent magnet 202. The first region 104 occupies nearly one-half of the outer surface of the rotor 10, and the second region 105 also occupies nearly one-half of the outer surface of the rotor 10. In this way, the magnetic field distribution is uniform, and there is only one N pole and one S pole. The rotor 10 can rotate smoothly. Compared with the traditional motor 100, the motor 100 of the present application has higher precision and torque, and less noise, which can bring a better user experience to users.

[0101] The number of permanent magnets can also be more than two, and the multiple permanent magnets are uniformly arranged on the outer surface of the rotor 10.

[0102] The rotor 10 includes a spherical rotor core 101, the outer surface of the rotor core 101 is covered with permanent magnets, and the permanent magnets can be bonded to the outer surface of the rotor core 101. The rotor 10 is made of magnetic silicon steel material, the first shaft 102 and the second shaft 103 are made of high-strength steel by quenching, and the rotor core 101 and the first shaft 102, and the rotor core 101 and the second shaft 103 are assembled by interference fit.

[0103] Optionally, when there are two permanent magnets, the first region 104 and the second region 105 are disposed on opposite sides of the rotating shaft of the rotor 10, the inner side of the first permanent magnet 201 is an N pole and the outer side is an S pole, and the inner side of the second permanent magnet 202 is an S pole and the outer side is an N pole. The inner side is the side facing the outer surface of the rotor 10, and the outer side is the side facing away from the outer surface of the rotor 10.

[0104] This setting makes the magnetic field evenly distributed, with only one N pole and one S pole, and the rotor 10 can rotate smoothly. Compared with the traditional motor 100, the motor 100 of the present application has higher precision and torque, and less noise, which can bring a better user experience.

[0105] Alternatively, if Figures 1 to 4 As shown, the rotor 10 is provided with a first rotating shaft 102 and a second rotating shaft 103 which are arranged opposite to each other, and the motor 100 further includes a first bearing 401 and / or a second bearing 402 .

[0106] The housing 302 is provided with a third shaft hole 3024 and a fourth shaft hole 3025, the first rotating shaft 102 passes through the first shaft hole 3023 and the third shaft hole 3024, and the second rotating shaft 103 passes through the second shaft hole 3024 and the fourth shaft hole 3025. The housing 302 is provided with a first bearing mounting seat 3021 and a second bearing mounting seat 3022, the first bearing 401 is fixed to the housing 302 through the first bearing mounting seat 3021, and the second bearing 402 is fixed to the housing 302 through the second bearing mounting seat 3022.

[0107] The first bearing 401 is disposed in the third shaft hole 3024 , and the first rotating shaft 102 is rotatably connected to the third shaft hole 3024 via the first bearing 401 .

[0108] The second bearing 402 is disposed in the fourth shaft hole 3025 , and the second rotating shaft 103 is rotatably connected to the fourth shaft hole 3025 via the second bearing 402 .

[0109] The first bearing 401 and the second bearing 402 are used to respectively realize the rotational connection between the first rotating shaft 102 and the stator 30 and the second rotating shaft 103 and the stator 30 . This connection method has low cost and high reliability.

[0110] It can be understood that the first bearing 401 and the second bearing 402 may not be provided, and the rotation of the rotor 10 may be achieved by using magnetic levitation technology.

[0111] An embodiment of the third aspect of the present application provides a household appliance, including the motor 100 described in any one of the above embodiments.

[0112] Since the household appliance provided by the embodiment of the third aspect of the present application includes the motor 100 described in any one of the above embodiments, it has all the beneficial effects of the motor 100 described in any one of the above embodiments, which will not be elaborated here.

[0113] The household appliance may be an air conditioner, a refrigerator, a freezer, a washing machine, or the like.

[0114] Taking the household appliance as an air conditioner as an example, the air conditioner includes an indoor unit and an outdoor unit. The indoor unit includes a housing, an evaporator, and an indoor fan. The housing defines an air duct, and the evaporator and the indoor fan are located in the air duct. The outdoor unit includes a condenser and an outdoor fan. Under the action of the indoor fan, air enters from the air inlet of the air duct, exchanges heat with the evaporator, and then flows out from the air outlet of the air duct. The outdoor fan is used to drive the air to exchange heat with the condenser. The indoor fan and / or the outdoor fan includes the motor 100, and the motor 100 may be the motor 100 described in any one of the above embodiments of the present application.

[0115] In summary, the motor 100 of the present application is more compact, efficient, high-precision, and high-torque compared with the structure of the traditional motor 100. At the same time, due to its simple internal structure, the self-rotation vibration is low, and the manufacturing cost is relatively low. When applied to products such as air conditioners, it can bring a better experience to users.

[0116] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Some parts and features of some embodiments may be included in or replaced by those of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A stator assembly for an electric machine, characterized in that, The motor includes a rotor provided with a first rotating shaft and a second rotating shaft arranged oppositely. The stator assembly includes: A stator including an inner shell which is spherical. The inner shell is provided with a first shaft hole and a second shaft hole respectively for the first rotating shaft and the second rotating shaft to pass through. The inner shell is provided with a plurality of winding grooves which are divided into multiple groups. The multiple groups of winding grooves are arranged in sequence around the connecting line direction of the first shaft hole and the second shaft hole. Windings wound in the winding grooves. The number of groups of windings is equal to and corresponds one by one to the number of groups of winding grooves.

2. The stator assembly for a motor according to claim 1, wherein The number of groups of winding grooves is four groups. The four groups of winding grooves are respectively the first to the fourth groups of winding grooves. The windings include the first to the fourth groups of windings. The first to the fourth groups of windings are respectively wound in the first to the fourth groups of winding grooves. In the first mode, it is suitable to pass a current in a first direction through the first group of windings and the third group of windings, and it is suitable to pass a current in a second direction through the second group of windings and the fourth group of windings. In the second mode, it is suitable to pass a current in a first direction through the first group of windings and the second group of windings, and it is suitable to pass a current in a second direction through the third group of windings and the fourth group of windings. In the third mode, it is suitable to pass a current in a second direction through the first group of windings and the third group of windings, and it is suitable to pass a current in a first direction through the second group of windings and the fourth group of windings. In the fourth mode, it is suitable to pass a current in a second direction through the first group of windings and the second group of windings, and it is suitable to pass a current in a first direction through the second group of windings and the fourth group of windings. Wherein, the first direction and the second direction are opposite.

3. The stator assembly for a motor according to claim 1, wherein The central angles corresponding to the multiple groups of winding grooves on the cross-section of the inner shell are equal and are evenly arranged on the inner shell. Among them, the connecting line of the first shaft hole and the second shaft hole is perpendicular to the cross-section.

4. The stator assembly for a motor according to claim 1, wherein At least one group of winding grooves includes a plurality of winding grooves. The multiple winding grooves in the at least one group of winding grooves are arranged in sequence along the direction from the first shaft hole to the second shaft hole.

5. The stator assembly for a motor according to any one of claims 1 to 4, wherein An insulating material is provided between adjacent two groups of winding grooves.

6. The stator assembly for an electric machine according to any one of claims 1 to 4, characterized in that, The stator further includes: An outer shell sleeved on the outside of the inner shell, and the outer shell and the inner shell are fixed by means of vacuum pumping and potting.

7. A motor, characterized in that, Including: The stator assembly for a motor according to any one of claims 1 to 6; A rotor arranged inside the inner shell. The rotor is provided with a first rotating shaft and a second rotating shaft arranged oppositely. The first rotating shaft is arranged in the first shaft hole, and the second rotating shaft is arranged in the second shaft hole.

8. The motor according to claim 7, wherein The rotor is spherical. The outer surface of the sphere includes a first region and a second region arranged oppositely. The motor further includes: A first permanent magnet covering the first region; A second permanent magnet covering the second region; Wherein, the magnetic fields generated by the first permanent magnet and the second permanent magnet are not parallel to the first rotating shaft.

9. The motor according to claim 7 or 8, characterized in that, It further includes: A first bearing, and the first rotating shaft is rotationally connected to the stator through the first bearing; and / or A second bearing, and the second rotating shaft is rotationally connected to the stator through the second bearing.

10. A household appliance, characterized in that, Including the motor according to any one of claims 7 to 9.

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