WO2022227387A1 - Moteur électrique et appareil électrique - Google Patents

Moteur électrique et appareil électrique Download PDF

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Publication number
WO2022227387A1
WO2022227387A1 PCT/CN2021/120333 CN2021120333W WO2022227387A1 WO 2022227387 A1 WO2022227387 A1 WO 2022227387A1 CN 2021120333 W CN2021120333 W CN 2021120333W WO 2022227387 A1 WO2022227387 A1 WO 2022227387A1
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WO
WIPO (PCT)
Prior art keywords
iron core
end cover
motor according
rotor
heat dissipation
Prior art date
Application number
PCT/CN2021/120333
Other languages
English (en)
Chinese (zh)
Inventor
周海东
甘峰
周晟
钟义旭
Original Assignee
广东威灵电机制造有限公司
威灵（芜湖）电机制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202120875860.5U external-priority patent/CN214543890U/zh
Priority claimed from CN202110455077.8A external-priority patent/CN113054783A/zh
Application filed by 广东威灵电机制造有限公司, 威灵（芜湖）电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Priority to JP2023553327A priority Critical patent/JP2024508153A/ja
Publication of WO2022227387A1 publication Critical patent/WO2022227387A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium

Definitions

  • the present invention relates to the technical field of motors, in particular to a motor and electrical equipment.
  • the existing motor is generally installed on the mounting bracket of the product, such as the motor for central electrical equipment.
  • the motor is connected to the mounting bracket through the mounting seat.
  • multiple mounting seats are usually used to connect to the mounting bracket.
  • this type of motor generates a large amount of heat, and the design of the mounting seat is unreasonable, which easily blocks the flow of air around the motor, so that the heat on the surface of the motor cannot be dissipated in time, resulting in an increase in the temperature of the motor and a reduction in the service life of the motor.
  • the present invention aims to at least partially solve one of the technical problems existing in the prior art. Therefore, the present invention proposes a motor, which can help to improve the heat dissipation efficiency of the motor, and has a more practical and reliable structure.
  • the present invention also provides electrical equipment including the above-mentioned motor.
  • stator assembly the stator assembly is arranged in the casing
  • the end cover is connected with the housing to form a cavity for accommodating the rotor assembly, and the rotor assembly is rotatably arranged in the cavity;
  • the outer periphery of the end cover is provided with a plurality of mounting seats protruding outward, the mounting seats are connected with the end cover, the mounting seats are provided with mounting holes, and each mounting seat is connected to the end cover.
  • the end caps are hollowed out to form through holes, and the outer side of the casing is provided with a plurality of heat dissipation ribs at intervals along the circumferential direction of the casing.
  • the structural strength of the mounting seat can be ensured to meet the installation standards and use requirements, and each mounting seat can be installed. Hollow out between the end cap and the end cover to form a through hole that can be ventilated, so that the airflow around the motor can pass through the through hole when flowing.
  • the hollow structure can not only reduce the amount of structural materials, but also reduce the wind resistance to airflow, which is beneficial Improve the wind field around the motor and increase the air volume blowing to the heat dissipation ribs, so as to quickly take away the heat of the heat dissipation ribs, so that the heat on the surface of the motor can be dissipated in time, the heat dissipation effect is better, and the structure is more reasonable and reliable.
  • the through holes are arranged along the axial direction of the casing, and on a projection plane perpendicular to the axial direction of the casing, at least part of the projection of the heat dissipation ribs is located at the axial direction of the through holes. within the projection area.
  • the cross-sectional width of the heat dissipation rib gradually decreases in the direction away from the casing, and the outer side surface of the heat dissipation rib away from the casing is a circular arc surface.
  • the cross section of the heat dissipation ribs has a maximum width L2, and the minimum distance L1 and the maximum width L2 satisfy L1 ⁇ 2L2.
  • an end plate is provided at an end of the housing away from the end cover in the axial direction, and one end of the heat dissipation rib is disposed along a radial direction of the end plate toward the center of the end plate.
  • the stator assembly includes a stator iron core, and the outer side of the stator iron core is injection-molded to form the outer shell and the heat dissipation rib.
  • the mounting seat is provided with at least two connecting ribs connected to the end cover, and the through hole is formed between two adjacent connecting ribs on each mounting seat.
  • the included angle ⁇ between any two of the connecting ribs on each of the mounting bases, and the included angle ⁇ satisfies 0° ⁇ 45°.
  • one end of the connecting rib along the axial direction of the end cap is provided with a first surface, and the other end is provided with a second surface, and the first surface and the second surface are respectively formed by at least one section. of curved surfaces.
  • the cross-sectional area of the connecting rib gradually decreases from the two ends to the middle.
  • the mounting seat is extended in a direction away from the end cover along the radial direction of the end cover, and the connecting rib on each mounting seat is connected to the corresponding mounting seat Tilt setting.
  • one end of the end cover is provided with a first side surface along the axial direction of the end cover, and the other end is provided with a second side surface, the first side surface is connected with the housing, and the second side surface is The side is provided with a first reinforcing rib and a second reinforcing rib, the first reinforcing rib is distributed along the circumferential direction of the end cover, the second reinforcing rib is distributed along the radial direction of the end cover, and the first reinforcing rib is spaced along the radial direction of the end cover.
  • a reinforcing rib is arranged crosswise with the second reinforcing rib.
  • the rotor assembly includes:
  • a rotor iron core the rotor iron core includes an inner iron core and an outer iron core, the inner iron core is provided with a rotating shaft, and the outer iron core includes a plurality of outer iron core units spaced around the inner iron core.
  • a accommodating groove is formed between the adjacent outer iron core units;
  • outer iron core and the inner iron core are spaced apart and filled with an injection molding body, and the outer iron core and the inner iron core are connected by the injection molding body.
  • the outer iron core unit includes a plurality of sector-shaped sheets stacked along the axial direction of the rotor iron core, and the sector-shaped sheets are provided with an inner side toward the inner iron core for positioning the permanent The first protrusion of the magnet.
  • the inner side of the fan-shaped sheet is further provided with a second protrusion, the second protrusion extends toward the direction of the inner iron core, and the second protrusion includes a first extension section and A second extension section, the first extension section extends along the circumferential direction of the rotor core, and the second extension section extends along the circumferential direction of the rotor core and in a direction away from the first extension section.
  • the outer side of the sector piece away from the inner iron core has a circular arc edge, the circular arc edge is provided with at least three sections, and the number of the circular arc edge is an odd number.
  • the inner iron core includes a plurality of ring pieces stacked along the axial direction of the rotor iron core, and third protrusions are provided on the outer side of the ring pieces along the circumferential direction of the rotor iron core
  • the third protrusion corresponds to the permanent magnet and is spaced apart, and the injection molded body is filled between the third protrusion and the permanent magnet.
  • both ends of the permanent magnet respectively protrude from the end surface of the outer iron core, and the protruding height H1 is the same as that of the outer iron core.
  • the ratio of the height H2 satisfies 0.02 ⁇ H1/H2 ⁇ 0.3.
  • each of the outer iron core units is provided with a first through slot, and the first through slot penetrates the corresponding outer iron core unit along the axial direction of the rotor iron core, so The first through groove is filled with the second injection molded body.
  • each of the outer iron core units is provided with a second through slot, and the second through slot penetrates the corresponding outer iron core unit along the axial direction of the rotor iron core, so as to for positioning the corresponding outer core unit.
  • the electrical equipment according to the embodiment of the second aspect of the present invention includes the motor described in the embodiment of the first aspect.
  • FIG. 1 is a schematic diagram of an exploded structure of a motor according to an embodiment of the present invention.
  • FIG. 2 is a partial cross-sectional structural schematic diagram of a motor according to an embodiment of the present invention.
  • FIG. 3 is a schematic front view of a motor according to an embodiment of the present invention.
  • FIG. 4 is a schematic view of a rear structure of a motor according to an embodiment of the present invention.
  • FIG. 5 is a schematic three-dimensional structural diagram of a stator assembly according to an embodiment of the present invention.
  • FIG. 6 is a schematic three-dimensional structural diagram of a stator assembly from another angle according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the upper end surface of the end cap according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of the structure of the lower end surface of the end cap according to an embodiment of the present invention.
  • Fig. 9 is the enlarged structure schematic diagram of A place in Fig. 2;
  • Fig. 10 is an enlarged schematic view of the structure at B in Fig. 4;
  • FIG. 11 is a schematic front view of the rotor core according to an embodiment of the present invention.
  • FIG. 12 is a schematic side view of a rotor core according to an embodiment of the present invention.
  • Figure 13 is an enlarged schematic view of the structure at C in Figure 11;
  • Figure 14 is an enlarged schematic view of the structure at D in Figure 11;
  • FIG. 15 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention.
  • Stator assembly 100 stator core 110, plastic casing 120, cooling ribs 121, root 1211, end 1212, shaft hole 122, second bearing chamber 123, lugs 124, waterproof cover 125;
  • Rotor assembly 200 rotor core 210, outer core 211, first through slot 2111, second through slot 2112, outer core unit 212, sector 2121, third extension 2122, fourth extension 2123, first Extension 2124, second extension 2125, first arc edge 2126, second arc edge 2127, third arc edge 2128, inner iron core 213, third protrusion 2131, magnetic tile 214, second injection molded body 215, shaft 220;
  • End cover 300 mounting seat 310, first mounting hole 311, positioning pin 312, connecting rib 320, through hole 321, first surface 322, second surface 323, mounting cavity 330, first bearing chamber 331, wire outlet hole 332, Grounding hole 333, flange 340, second mounting hole 341, first reinforcing rib 350, second reinforcing rib 360;
  • a motor 1000 according to an embodiment of the present invention is described with reference to FIGS. 1 to 15 , and the motor 1000 is suitable for electrical equipment.
  • the motor 1000 will be described below with a specific example.
  • the motor 1000 provided by the embodiment of the present invention includes a stator assembly 100, a rotor assembly 200 and an end cover 300, wherein the rotor assembly 200 includes a rotor iron core 210 and a rotating shaft 220, and the rotating shaft 220 and the rotor iron core 210 is connected;
  • the stator assembly 100 includes a stator iron core 110, the outer side of the stator iron core 110 is provided with a casing, the casing and the end cover 300 are connected to form a casing of the motor 1000, and a receiving cavity is formed in the casing, and the rotating shaft 220 and the rotor iron core 210 can be connected. It is rotatably arranged in the accommodating cavity, and one end of the rotating shaft 220 extends through the plastic casing 120 to the outside of the casing to form a driving shaft.
  • the stator iron core 110 is in the shape of a circular ring, and a first injection molded body is formed by injection molding on the outer side of the stator iron core 110 , and the first injection molded body covers a part of the stator iron core 110 , so that the first injection molded body is formed.
  • the injection molded body forms a casing on the stator core 110 , and the casing is a plastic-encapsulated casing 120 .
  • a plurality of heat dissipation ribs 121 are disposed on the outer peripheral wall of the plastic casing 120 .
  • the heat generated inside the motor 1000 can be transferred to the heat dissipation ribs 121 through the plastic casing 120 , and the heat dissipation ribs 121 are beneficial to increase the surface area of the plastic casing 120 and improve the heat dissipation effect.
  • a mounting seat 310 is provided on the outer side of the end cover 300, and the motor 1000 is integrally connected to the mounting bracket (not shown in the drawings) on the electrical equipment through the mounting seat 310, so that the motor 1000 Can be fixed on the mounting bracket.
  • four mounting seats 310 are disposed on the outer side of the end cover 300 , and the four mounting seats 310 are symmetrically distributed at the outer edge positions of the end cover 300 .
  • the mounting seat 310 of the conventional motor 1000 is directly connected to the end cover 300, or is connected to the end cover 300 through a connecting structure such as a connecting plate, since the mounting seat 310 or the connecting structure will have a certain blocking effect on the axial airflow, so that the The wind field around the motor 1000 will be affected, reducing the amount of air blowing to the outer surface of the fan.
  • the airflow flows along the axial direction of the rotating shaft 220 of the motor 1000, and the plurality of mounting seats 310 protruding from the outside of the motor 1000 will block the flow direction of the airflow, reduce the airflow passing through the surface of the motor 1000, and not It is beneficial to the heat dissipation of the surface of the motor 1000, resulting in an increase in the temperature of the motor 1000.
  • each mounting seat 310 and the end cover 300 are hollowed out, so that a through hole 321 is formed between the mounting seat 310 and the end cover 300, and the through hole 321 can be connected with the end cover 300.
  • At least part of the heat dissipation ribs 121 corresponds to, on the projection plane perpendicular to the axial direction of the plastic casing 120 , the projection of at least part of the heat dissipation ribs 121 is located in the projection area of the through hole 321 , that is, in the axial direction of the plastic casing 120 .
  • the airflow around the motor 1000 can pass through the through hole 321 in the axial direction, and after passing through the through hole 321, the airflow can be directly blown to the heat dissipation rib 121, thereby reducing the wind resistance of the axial airflow and improving the air flow to the surface of the plastic casing 120.
  • the air volume of the heat dissipation rib 121 It can be understood that the airflow can also pass through the heat dissipation ribs 121 and then pass through the through holes 321 to reduce wind resistance.
  • the mounting base 310 can be connected to the end cover 300 through a connecting plate, the connecting plate is provided with a through hole 321, and the through hole 321 penetrates the connecting plate in the axial direction, so that the airflow can pass through the connecting plate through the through hole 321, effectively reducing the connecting plate
  • the wind resistance can improve the wind field around the motor 1000.
  • each mounting seat 310 is provided with two connecting ribs 320 , and the mounting seat 310 is connected to the end cover 300 through the connecting ribs 320 .
  • One end of each connecting rib 320 is connected with the mounting seat 310, and the other end is connected with the end cover 300.
  • the two connecting ribs 320 on each mounting seat 310 are separated by a certain distance, so that the mounting seat 310 is connected by two
  • the ribs 320 are fixedly connected with the mounting seat 310, so that the mounting seat 310 is stably supported.
  • the two connecting ribs 320 on each mounting seat 310 are hollowed out, so that a through hole 321 is formed between the mounting seat 310 and the end cover 300, and the through hole 321 penetrates along the axial direction of the end cover 300, so that The airflow can pass through the connection position between the mounting seat 310 and the end cap 300 along the through hole 321 .
  • the end cover 300 is connected to the bottom end of the plastic casing 120 , and the through hole 321 is formed between the mounting seat 310 and the end cover 300 , so that the through hole 321 can correspond to a part of the heat dissipation ribs 121 .
  • the mounting base 310 and the end cover 300 are connected by connecting ribs 320 .
  • the hollow arrangement ensures that the connecting rib 320 can stably support the end cover 300, reduces the impact of the connecting rib 320 on the airflow around the motor 1000, can effectively reduce wind resistance, and is conducive to improving the wind field around the motor 1000, the airflow along the axis of the motor 1000
  • the heat dissipation rib 121 can pass through the through hole 321 and can be blown toward the surface of the plastic casing 120 when flowing in the direction of flow, so as to quickly take away the heat of the heat dissipation rib 121 , thereby improving the heat dissipation efficiency of the motor 1000 .
  • the through hole 321 is formed by the connecting rib 320, the end cover 300 and the mounting seat 310, and the area surrounded by the projection of the connecting rib 320, the end cover 300 and the mounting seat 310 on the projection plane can be understood as
  • the projection area of the through hole 321, the projection of the heat dissipation rib 121 on the projection surface is located in the projection area.
  • the end surface of part of the heat dissipation ribs 121 located at the bottom end of the plastic casing 120 can face the through hole 321 , and the bottom end of the plastic casing 120 is the end connected to the end cover 300 .
  • the airflow is blown toward the heat dissipation ribs 121 through the through holes 321 , and can pass through the outer surface of the plastic casing 120 along the gaps between the heat dissipation ribs 121 , greatly increasing the air volume passing through the outer surface of the motor 1000 , and the heat dissipation effect is remarkable.
  • the number of the through holes 321 is set according to the installation requirements of the mounting seat 310 . The greater the number of through holes 321 is, the more heat dissipation ribs 121 corresponding to the through holes 321 are. Under the condition that the motor 1000 has sufficient installation strength, the effective Improve the wind field around the motor 1000.
  • connecting ribs 320 are used for connection between the end cover 300 and the mounting seat 310, and the hollow structure defined between the connecting ribs 320 is beneficial to reduce the material consumption of the connecting structure, reduce the manufacturing cost of the end cover 300 of the motor 1000, and also can reduce the cost of the motor 1000.
  • the peripheral airflow of 1000 plays a role in giving way to meet the assembly and heat dissipation requirements of the motor 1000, and the structure is practical and reliable.
  • each mounting seat 310 can be provided with three or more connecting ribs 320, and adjacent connecting ribs 320 Both are hollow structures.
  • connecting ribs 320 the structural strength between the mounting seat 310 and the end cover 300 can be effectively improved, ensuring that the structural strength meets the installation standards and usage requirements, and the overall support of the motor 1000 is more reliable.
  • the number of the mounting bases 310 is not limited to four, but three or more than five can be provided, and details are not repeated here.
  • the heat dissipation ribs 121 and the plastic casing 120 are integrally injection-molded, the plastic casing 120 is substantially cylindrical, the heat dissipation ribs 121 protrude from the outer surface of the plastic casing 120 , the plastic casing 120 and the heat dissipation
  • the ribs 121 are all made of plastic.
  • the heat dissipation ribs 121 include a root portion 1211 and an end portion 1212, the bottom end of the root portion 1211 is connected to the plastic casing 120, the top end of the root portion 1211 is the end portion 1212, and the cross-sectional shape of the root portion 1211 is roughly trapezoid.
  • the cross-sectional shape of the end portion 1212 is roughly arc-shaped, that is, the cross-section of the heat dissipation rib 121 adopts a combination of a trapezoidal cross-section and an arc-shaped cross-section.
  • the width of the cross section of the root portion 1211 gradually decreases in the direction away from the plastic casing 120, and transitions through the arc surface at the end portion 1212, that is, the width of the heat dissipation rib 121 gradually narrows from the bottom end to the top end.
  • the heat dissipation capability of the heat dissipation rib 121 can be effectively improved under the condition of the same amount of material.
  • the cross-sectional width of the root portion 1211 of the heat dissipation rib 121 is larger than the cross-sectional width of the end portion 1212 , and the cross-sectional width of the heat dissipation rib 121 is set according to the actual heat dissipation requirements, and no limited.
  • the cross-section of the root portion 1211 has a maximum width L2. As shown in FIG. 10 , the maximum width L2 is understood as the cross-sectional width of the connection between the root portion 1211 and the plastic casing 120 , and the distance between the roots 1211 of adjacent heat dissipation ribs 121 .
  • the minimum distance L1 is the minimum distance L1
  • the minimum distance L1 and the maximum width L2 satisfy L1 ⁇ 2L2, that is, the distance between the roots 1211 of adjacent cooling ribs 121 is greater than twice the cross-sectional width of the roots 1211 to ensure that the cooling ribs 121 are sufficiently large.
  • the spacing is more efficient for heat dissipation.
  • one end of the plastic casing 120 is connected to the end cover 300 , the other end is an end plate, and the end plate is provided with a shaft hole 122 corresponding to the rotating shaft 220 .
  • the heat dissipation rib 121 extends to the surface of the end plate, and extends inward along the radial direction of the plastic casing 120 on the surface of the end plate, so that the heat dissipation ribs 121 cover the end plate at the same time, which is beneficial to further improve the heat dissipation performance of the plastic casing 120 .
  • each mounting seat 310 is connected to the end cover 300 through two connecting ribs 320 , and there is a certain distance between the two connecting ribs 320 .
  • included angle ⁇ can be understood as the included angle between the two connecting ribs 320 on the same plane, and the included angle ⁇ satisfies 0° ⁇ 45°, which can make the stress of the connecting ribs 320 more reasonable, and has Sufficient support strength to achieve the best cost effect.
  • the included angle ⁇ between the two connecting ribs 320 may be 0°, that is, the two connecting ribs 320 are arranged parallel to each other; for another example, the included angle ⁇ between the two connecting ribs 320 may also be 20°, 30° , 45°, etc.
  • the mounting base 310 can be provided with more than three connecting ribs 320, and the included angles ⁇ between adjacent connecting ribs 320 all satisfy 0° ⁇ 45°.
  • the mounting base 310 can be provided with more than three connecting ribs 320, and the included angles ⁇ between adjacent connecting ribs 320 all satisfy 0° ⁇ 45°.
  • three connecting ribs 320 as an example, two connecting ribs 320 are arranged in parallel, the third connecting rib 320 is arranged between the two parallel connecting ribs 320, and the third connecting rib 320 is respectively connected with the two parallel connecting ribs 320.
  • the connecting ribs 320 intersect, and the included angle ⁇ between the adjacent connecting ribs 320 is 45°, and details are not repeated here.
  • the connecting rib 320 is in the shape of a strip as a whole, and presents a certain radian change on the surface of the connecting rib 320 along the axial direction of the end cover 300 .
  • the side of the connecting rib 320 facing the direction of the plastic casing 120 is the first surface 322
  • the side facing away from the first surface 322 is the second surface 323 .
  • the first surface 322 and the second surface 323 are both arc surfaces, wherein the first surface 322 can be understood as The upper surface and the second surface 323 can be understood as the lower surface.
  • the first surface 322 and the second surface 323 are respectively composed of a segment of arc-shaped surfaces.
  • the contour line of the first surface 322 and the second surface 323 is an arc-shaped line, which connects the upper surface of the rib 320.
  • the curved surface is used for the lower surface and the lower surface, which is beneficial to further reduce the wind resistance.
  • the upper surface and the lower surface of the connecting rib 320 are not limited to the structures shown in the embodiments, and may also be composed of multiple arc surfaces, which can satisfy the structural topology optimization, can make full use of materials, achieve the effect of design optimization, and make the connection
  • the force of the ribs 320 is more reasonable and the support strength is improved.
  • the upper surface and the lower surface are composed of three arc-shaped surfaces respectively, that is, the contour lines of the upper surface and the lower surface respectively have three arc-shaped lines; It consists of two arc surfaces.
  • each connecting rib 320 varies non-uniformly along the axial direction of the connecting rib 320.
  • the connecting rib 320 has a shape with a thin middle and thick ends. The cross-sectional area of the rib 320 gradually decreases from the two ends to the middle.
  • the cross-sectional area of the two ends of the connecting rib 320 is relatively large, while the cross-sectional area of the middle part of the connecting rib 320 is relatively small, which can make the connection between the connecting rib 320 and the end cover 300 and the mounting seat 310 more stable and reliable, that is, the connection.
  • Both ends of the rib 320 are reinforced, so that the force of the connecting rib 320 is optimized, and the supporting strength is higher; and the middle part of the connecting rib 320 is thinner than the two ends, which is beneficial to further reduce the wind resistance of the connecting rib 320, and the structure is more Reasonable.
  • the height of the cross-section of the connecting rib 320 is set not less than the width of the cross-section, and the height of the cross-section of the connecting rib 320 is the height of the connecting rib 320 along the axial direction of the end cover 300 .
  • the height of the cross-section of the connecting rib 320 as shown in FIG. 9 is H3
  • the width of the cross-section of the connecting rib 320 as shown in FIG. 10 is H4, and H3 and H4 satisfy H3 ⁇ H4.
  • the mounting seat 310 is plate-shaped, and the axis of the mounting seat 310 is perpendicular to the axis of the end cover 300 .
  • the specific size of the mounting seat 310 is designed according to the installation requirements, which is not limited here.
  • the connecting ribs 320 on each mounting seat 310 are connected to the mounting seat 310 obliquely.
  • FIG. 2 is a side view of the motor 1000 .
  • the surface has an arc surface, and the connecting ribs 320 on the adjacent mounting bases 310 cooperate to form a horn shape.
  • the side of the end cover 300 connected to the plastic casing 120 is the first side, and the other side facing away from the first side is the second side.
  • the first side can be understood as the end cover 300
  • the second side can be understood as the lower end surface of the end cover 300 .
  • the upper end surface of the end cover 300 is provided with an installation cavity 330 , and the stator iron core 110 is matched with the installation cavity 330 , so that the stator iron core 110 is more stable.
  • one end of the connecting rib 320 on each mounting seat 310 is connected to the outer side of the end cover 300 near the port of the mounting cavity 330, and the other end is connected to the mounting seat 310.
  • the mounting seat 310 is arranged close to the lower end surface, so that the connecting rib is 320 extends obliquely from the position close to the first end face to the position of the mounting seat 310, so that when the connecting ribs 320 are evenly distributed, all the connecting ribs 320 cooperate in a horn-like structure to support the motor 1000, and the structural optimization effect is good, making the connection
  • the rib 320 has high support strength, and minimizes the wind resistance of the connecting rib 320 to the airflow.
  • each mounting seat 310 is provided with a first mounting hole 311 , and the mounting seat 310 is connected to the mounting bracket on the electrical device through the first mounting hole 311 .
  • a mounting bracket is provided on the outer unit of the central air conditioner, and connecting parts such as screws are used to pass through the first mounting hole 311 to connect the mounting seat 310 to the mounting bracket, so that the motor 1000 is fixedly installed on the on the central air conditioner.
  • any two mounting bases 310 may be provided with positioning nails 312, and the positioning nails 312 correspond to the positioning holes on the mounting bracket, which facilitates the quick positioning of the mounting base 310 and the mounting bracket.
  • the positioning pins 312 are first matched with the positioning holes on the mounting bracket, and then fixed with screws, which is beneficial to improve the installation efficiency.
  • the end cover 300, the connecting rib 320 and the mounting seat 310 are integrally formed, so that the overall structure of the end cover 300 of the motor 1000 has high stability and reliability.
  • the first mounting hole 311 penetrates the mounting seat 310 along the axial direction of the end cover 300 , and the positioning pins 312 are disposed on the mounting seat 310 toward the side away from the stator assembly 100 .
  • an outwardly extending flange 340 is provided on the outer side of the end cap 300 , and the flange 340 is provided at a position close to the port of the mounting cavity 330 .
  • the flange 340 protrudes from the outer side of the end cover 300 in the radial direction, and the connecting rib 320 is connected to the flange 340.
  • the flange 340 can reinforce the connection between the connecting rib 320 and the end cover 300, so that the connecting rib 320 has a structure More reliable and stronger support.
  • the flange 340 extends along the circumferential direction of the end cover 300 , so that the connecting ribs 320 on the adjacent mounting bases 310 can be connected by the flange 340 to further increase the structural strength.
  • the flange 340 is provided with a second mounting hole 341, and the flange 340 is connected to the lug 124 on the plastic casing 120 through the second mounting hole 341, so that the end cover 300 can be connected to the plastic casing 120, so that the flange 340 not only It can play a reinforcing role, and can also be connected with the plastic casing 120 to simplify the overall structure of the motor 1000 .
  • a first reinforcing rib 350 and a second reinforcing rib 360 are provided on the lower end surface of the end cap 300 , wherein the first reinforcing rib 350 is distributed at intervals along the circumferential direction of the end cap 300 , and the first reinforcing rib 350 is The ribs 350 extend to the edge of the end cover 300 along the radial direction of the end cover 300 ; the second reinforcing ribs 360 are spaced apart along the radial direction of the end cover 300 , and the second reinforcing ribs 360 extend along the circumferential direction of the end cover 300 , so that the first The reinforcing rib 350 and the second reinforcing rib 360 can intersect on the lower end surface. It can be understood that the first reinforcing ribs 350 are radially distributed and interwoven with the second reinforcing ribs 360 extending in the circumferential direction to form a mesh structure, which can effectively reinforce the end cap 300 .
  • the first bearing chamber 331 is provided at the center of the installation cavity 330 , the bearing 400 is installed in the first bearing chamber 331 , and the first bearing chamber 331 is recessed on the bottom surface of the installation cavity 330 .
  • the bottom surface of the first bearing chamber 331 is a closed structure.
  • first bearing chamber 331 is formed concavely toward the lower end surface of the end cover 300, a protrusion is formed on the surface of the lower end surface corresponding to the first bearing chamber 331, so that the first reinforcing rib 350 can be connected with the protrusion, that is, the first The reinforcing ribs 350 are staggeredly connected to the outer side of the first bearing chamber 331 , which further improves the overall structural rigidity of the end cover 300 of the motor 1000 , which is beneficial for the bearing 400 to carry a larger load.
  • a wire outlet hole 332 is provided on the end cover 300, and the wire outlet hole 332 penetrates the end cover 300 in the axial direction, so that the first side and the second side of the end cover 300 communicate with each other, so that the power cable 500 can pass from the motor 1000 to the motor 1000.
  • the outer side of the wire enters the cavity along the wire outlet hole 332 , so that the power wire 500 can be connected to the stator assembly 100 .
  • the end cover 300 is also provided with a grounding hole 333, and the grounding hole 333 is arranged in the installation cavity 330.
  • the grounding hole 333 is connected to the grounding wire through a screw, so that the end cover 300 can realize Grounded to meet the electrification requirements of the motor 1000.
  • the plastic casing 120 is provided with a second bearing chamber 123 , a bearing 400 is installed in the second bearing chamber 123 , one end of the rotating shaft 220 is connected to the bearing 400 in the first bearing chamber 331 , and the other end of the rotating shaft 220 It is connected with the bearing 400 in the second bearing chamber 123, so that the rotating shaft 220 is stably supported.
  • a waterproof cover 125 is provided at the position of the shaft hole 122 , which effectively improves the waterproof performance of the motor 1000 .
  • the rotor iron core 210 includes an inner iron core 213 and an outer iron core 211 , the rotating shaft 220 is connected to the inner iron core 213 , and the outer iron core 211 includes a plurality of outer iron core units 212 , a plurality of outer iron core units 212 are arranged at intervals around the inner iron core 213, adjacent outer iron core units 212 are spaced apart to form accommodation slots, each accommodation slot is provided with a permanent magnet, so that the permanent magnets are placed in the outer iron core 211.
  • the rotor iron core 210 includes ten outer iron core units 212 and one inner iron core 213 , and the number of permanent magnets is also ten.
  • each outer iron core unit 212 is separated from the inner iron core 213 , and the outer iron core unit 212 and the inner iron core 213 are filled with insulating non-magnetic material by injection molding.
  • a second injection molded body 215 is formed, and through the second injection molded body 215, the outer iron core 211, the inner iron core 213 and the permanent magnet can be combined into an integral structure.
  • the permanent magnet is the magnetic tile 214 .
  • the adjacent outer iron core units 212 are all disconnected, and each outer iron core unit 212 is separated from the inner iron core 213, and the second injection molded body 215 makes the outer iron core 211 and the inner iron core Insulation is formed between 213 and between the magnetic tile 214 and the inner iron core 213, thereby improving the insulation between the rotating shaft 220 and the outer iron core 211, effectively reducing the shaft voltage, and greatly reducing the risk of electrical corrosion damage to the bearing 400, which is reliable and reliable. Sex is higher.
  • the second injection body 215 may be made of resin material, which is not specifically limited.
  • each of the outer iron core units 212 includes a plurality of sector-shaped pieces 2121 stacked along the axial direction of the rotor iron core 210 .
  • the side of the fan-shaped sheet 2121 facing the inner iron core 213 is the inner side
  • the side away from the inner iron core 213 is the outer side.
  • the magnetic tile 214 is positioned.
  • the adjacent outer iron core units 212 are all disconnected, the inner sides of the accommodating grooves are all open and correspond to the inner iron core 213 , the magnetic tiles 214 are assembled in the accommodating grooves, and the first protrusions extend toward the direction of the accommodating grooves , the first protrusion can be understood as a protrusion structure formed on the inner side of the fan-shaped sheet 2121 , the inner side of the magnetic tile 214 can be supported by the first protrusion, and the magnetic tile 214 can be positioned when the second injection body 215 is filled. It can reduce the deflection of the magnetic tile 214 in the accommodating groove, and improve the stability and reliability.
  • the inner side of the fan-shaped sheet 2121 is further provided with a second protrusion, and the second protrusion extends toward the direction of the inner iron core 213 .
  • the second protrusion includes a first extension section 2124 and a second extension section 2125.
  • the first extension section 2124 and the second extension section 2125 respectively extend along the circumference of the rotor core 210 and are symmetrically distributed.
  • the second injection molded body 215 is filled between the iron core 213 and the outer iron core 211, and is embedded in the second injection molded body 215 through the first extension section 2124 and the second extension section 2125, which is beneficial to improve the outer iron core unit 212 and the second injection molded body.
  • the bonding force of the body 215 increases the structural strength.
  • the first extension section 2124 and the second extension section 2125 on the second protrusion form a Y-shaped structure
  • the second injection body 215 completely covers the Y-shaped structure
  • the The Y-shaped structure can be completely embedded in the injection body, which makes the connection between the outer iron core 211 and the injection body more tightly and firmly, and ensures that the combination of the outer iron core 211 and the second injection body 215 in the radial and circumferential directions is strengthened, thereby greatly improving the rotor.
  • the overall strength of the assembly 200 makes the rotor assembly 200 more stable when outputting a large torque.
  • the shape formed by the cooperation of the first extension section 2124 and the second extension section 2125 is not limited to the above example, and may also be a T-shape or other shapes.
  • the first protrusion includes a third extension section 2122 and a third extension section 2122, and the third extension section 2122 and the fourth extension section 2123 respectively extend along the circumferential direction of the rotor core 210, so that the third extension section 2122 and the fourth extending section 2123 are positioned corresponding to the adjacent magnetic tiles 214 respectively.
  • Both the third extension section 2122 and the fourth extension section 2123 are arranged on the inner side of the sector sheet 2121 and are symmetrically distributed along the radial direction of the rotor core 210.
  • the third extension section 2122 shown in FIGS. 11 and 13 extends in the counterclockwise direction.
  • the four extension sections 2123 extend in a clockwise direction.
  • an accommodating groove is formed between two adjacent sector-shaped pieces 2121, wherein the third extension section 2122 on one sector-shaped piece 2121 and the fourth extension section 2123 on the other sector-shaped piece 2121 cooperate with the magnetic field of the accommodating slot.
  • the tile 214 is positioned, and the structure is stable and reliable.
  • the outer side of the sector piece 2121 is an arc edge
  • the arc edge is composed of three arc edges
  • the three arc edges are sequentially connected along the circumferential direction of the rotor core 210
  • An outer contour line is formed, and the three arc-shaped sides shown in FIG. 14 are respectively a first arc-shaped side 2126 , a second arc-shaped side 2127 and a third arc-shaped side 2128 .
  • the configuration of the above-mentioned outer contour line shape can reduce the amount of flow from the rotor iron core 210 to the stator pole shoe and then to the magnetic circuit of the rotor iron core 210, which can reduce the magnetic circuit of the rotor iron core 210 at the alternating magnetic poles.
  • the magnetic leakage phenomenon increases the utilization rate of the magnetic tile 214 and is beneficial to improve the performance of the motor 1000 .
  • the arc edge of the arc edge is not limited to the first arc edge 2126, the second arc edge 2127 and the third arc edge 2128 shown in the embodiment, and the arc edge can also be more than three sections, And the number of arc sides is an odd number, for example, five segments, seven segments, etc., and details are not repeated here.
  • the protrusion height H1 is understood as the distance between the top of the magnetic tile 214 and the top of the outer iron core 211, and the height of the outer iron core 211 is H2, H1 and H2 The ratio satisfies 0.02 ⁇ H1/H2 ⁇ 0.3.
  • the problem of high back EMF can be solved, which is beneficial to improve the performance of the motor 1000.
  • the height of the magnetic tile 214 protruding from the outer iron core 211 is too large, the effect on performance is not obvious, that is, the investment cost is not proportional to the performance improvement. Therefore, in this embodiment, the height of the magnetic tile 214 is limited. Satisfying the above proportional relationship makes the design of the rotor core 210 more reasonable.
  • the second injection molded body 215 covers both ends of the magnetic tile 214 , as shown in FIG. 15 .
  • the magnetic tile 214 adopts a cuboid structure, and the magnetic tile 214 may be a sintered ferrite magnet or a neodymium magnet, etc., and the shape may also be a trapezoid or the like.
  • the inner iron core 213 includes a plurality of ring pieces stacked along the axial direction of the rotor iron core 210 , and a third protrusion 2131 is provided on the outer side of each ring piece in the circumferential direction , the third protrusion 2131 can be understood as a raised structure on the outer periphery of the ring sheet, the ring sheet is roughly annular, the top of the third protrusion 2131 is an arc edge, and the third protrusion 2131 is connected to the ring sheet There is an arc transition in between.
  • the number of the third protrusions 2131 is the same as the number of the magnetic tiles 214, so that the third protrusions 2131 and the magnetic tiles 214 are in one-to-one correspondence, and the second injection molded body passes between the third protrusions 2131 and the permanent magnet. 215 are separated to form insulation, and the third protrusion 2131 is embedded in the second injection body 215.
  • the third protrusion 2131 can increase the bonding force between the inner iron core 213 and the second injection body 215, and cooperate with the second protrusion. In this way, the bonding force of the inner iron core 213 , the outer iron core 211 and the second injection molded body 215 can be greatly improved, thereby effectively improving the overall strength of the rotor iron core 210 .
  • each outer iron core unit 212 is provided with a first through slot 2111 , and the first through slot 2111 penetrates through the outer iron core unit 212 along the axial direction of the rotor iron core 210 , that is, The first through grooves 2111 penetrate through each sector piece 2121 .
  • non-magnetic conductive material is injected into each first through groove 2111, so that the second injection molded body 215 can be filled into each first through groove 2111, and all sectors 2121 on each outer iron core unit 212 can be fixed.
  • the second injection molded body 215 is simultaneously filled between the outer iron core 211 and the inner iron core 213 and in each of the first through grooves 2111 on the outer iron core 211 , thereby further improving the overall strength of the rotor iron core 210 .
  • the second injection molded body 215 can cover the magnetic tile 214 and part of the rotor iron core 210 at both ends of the rotor iron core 210 in the axial direction, so that the outer iron core 211 , the inner iron core 213 and the magnetic tile 214 form the rotor assembly 200 , which can reduce the magnetic flux leakage between the outer iron core 211 and the inner iron core 213 on the premise of ensuring the structural strength, and improve the power density of the motor 1000 .
  • the cross-sectional shape of the first through groove 2111 is not limited to a circle, but can also be a polygon.
  • the second injection molded body 215 is filled in the first through groove 2111, and the triangular injection molded body has higher strength, which is beneficial to improve the structural strength of the outer iron core 211, and is more practical and reliable.
  • each outer iron core unit 212 is provided with a second through slot 2112 , the second through slot 2112 penetrates the outer iron core unit 212 along the axial direction of the rotor iron core 210 , and the outer iron core unit 212 passes through the second through slot 2112 to locate.
  • the first positioning pin (not shown in the drawings) on the injection mold is inserted into the shaft mounting hole of the inner iron core 213, and the first positioning pin positions the inner iron core 213 so that each ring The rings can be stacked correspondingly; at the same time, the second positioning pins (not shown in the drawings) are inserted into the second through grooves 2112, so that each segment 2121 can be positioned at the same time, and the positioning is more stable and reliable, and then the outer iron core 211 and the inner iron
  • the gap between the cores 213 and each of the first through grooves 2111 are subjected to an injection molding operation.
  • the first positioning pin and the second positioning pin are pulled out, that is, the integral molding of the rotor core 210 is completed.
  • the embodiment of the present invention also provides electrical equipment (not shown in the drawings), the electrical equipment may be an air conditioner, a refrigerator, etc., and the motor 1000 used in the electrical equipment is the motor 1000 of the above-mentioned embodiment. Since the electrical equipment adopts all the technical solutions of the motor 1000 of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

L'invention concerne un moteur électrique et un appareil électrique. Le moteur électrique (1000) comprend un boîtier, un ensemble rotor (200), un ensemble stator (100) disposé dans le boîtier, et un couvercle d'extrémité (300). Le couvercle d'extrémité (300) est relié au boîtier pour former une cavité utilisée pour recevoir l'ensemble rotor (200). L'ensemble rotor (200) est disposé rotatif dans la cavité. Une pluralité de bases de montage (310) faisant saillie vers l'extérieur sont disposées le long de la périphérie extérieure du couvercle d'extrémité (300). Les bases de montage (310) sont reliées au couvercle d'extrémité (300) et comportent des trous de montage. L'espace entre chaque base de montage (310) et le couvercle d'extrémité (300) est creusé pour former des trous traversants (321). Une pluralité de nervures de dissipation de chaleur (121) sont disposées à des intervalles sur le côté extérieur du boîtier le long de la direction circonférentielle du boîtier.
PCT/CN2021/120333 2021-04-26 2021-09-24 Moteur électrique et appareil électrique WO2022227387A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023553327A JP2024508153A (ja) 2021-04-26 2021-09-24 モータ及び電気機器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202120875860.5U CN214543890U (zh) 2021-04-26 2021-04-26 电机及电器设备
CN202120875860.5 2021-04-26
CN202110455077.8 2021-04-26
CN202110455077.8A CN113054783A (zh) 2021-04-26 2021-04-26 电机及电器设备

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WO2022227387A1 true WO2022227387A1 (fr) 2022-11-03

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0974727A (ja) * 1995-09-08 1997-03-18 Denso Corp 交流発電機用整流装置
CN203398916U (zh) * 2013-08-14 2014-01-15 宁波市法莱欣科技有限公司 一种车用发电机端盖
CN205846921U (zh) * 2016-07-14 2016-12-28 浙江正田电机制造有限公司 一种汽车发电机壳体
CN113054783A (zh) * 2021-04-26 2021-06-29 广东威灵电机制造有限公司 电机及电器设备
CN214900431U (zh) * 2021-04-26 2021-11-26 广东威灵电机制造有限公司 电机端盖、电机及电器设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0974727A (ja) * 1995-09-08 1997-03-18 Denso Corp 交流発電機用整流装置
CN203398916U (zh) * 2013-08-14 2014-01-15 宁波市法莱欣科技有限公司 一种车用发电机端盖
CN205846921U (zh) * 2016-07-14 2016-12-28 浙江正田电机制造有限公司 一种汽车发电机壳体
CN113054783A (zh) * 2021-04-26 2021-06-29 广东威灵电机制造有限公司 电机及电器设备
CN214900431U (zh) * 2021-04-26 2021-11-26 广东威灵电机制造有限公司 电机端盖、电机及电器设备

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