WO2020177415A1 - Ensemble moteur électrique et four - Google Patents

Ensemble moteur électrique et four Download PDF

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Publication number
WO2020177415A1
WO2020177415A1 PCT/CN2019/122723 CN2019122723W WO2020177415A1 WO 2020177415 A1 WO2020177415 A1 WO 2020177415A1 CN 2019122723 W CN2019122723 W CN 2019122723W WO 2020177415 A1 WO2020177415 A1 WO 2020177415A1
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WO
WIPO (PCT)
Prior art keywords
motor
heat sink
motor shaft
heat
shaft
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PCT/CN2019/122723
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English (en)
Chinese (zh)
Inventor
李云龙
孙炎军
唐相伟
Original Assignee
广东美的厨房电器制造有限公司
美的集团股份有限公司
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Publication date
Application filed by 广东美的厨房电器制造有限公司, 美的集团股份有限公司 filed Critical 广东美的厨房电器制造有限公司
Publication of WO2020177415A1 publication Critical patent/WO2020177415A1/fr

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    • 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
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • This application relates to the technical field of kitchen appliances, in particular to a motor assembly and an oven with the motor assembly.
  • the driving motor of the hot fan generally adopts a heat dissipation fan embedded in the motor to dissipate heat, so as to solve the temperature rise problem of the motor.
  • the center of the fan coincides with the shaft of the motor, and is driven to rotate by the shaft of the motor, and the wind generated by the rotation dissipates heat from the windings of the motor.
  • the cooling fan is driven to rotate by the motor shaft.
  • the motor not only needs to drive a heating fan, but also a cooling fan, which increases the load of the motor, increases the heating of the motor winding, and reduces the efficiency of the motor.
  • the cooling fan increases the overall axial size of the motor assembly, increases the cost of the motor, and is inconvenient for application in electronic products.
  • the overall motor vibration and noise are relatively large.
  • the first aspect of the present application is to provide a motor assembly that can dissipate heat through a heat sink.
  • the motor assembly includes a motor and a heat sink.
  • the motor includes a stator, a rotor, and a motor shaft connected to the rotor.
  • the rotor is rotatably matched with the stator; the heat sink is connected to the motor shaft of the motor, and the heat sink is adapted to follow
  • the motor shaft rotates, and the heat sink extends in a direction perpendicular to the motor shaft.
  • heat can be dissipated through the heat sink.
  • motor assembly according to the foregoing embodiment of the present application may also have the following additional technical features:
  • the heat sink is provided on the inner side of the end of the motor shaft for connecting the load.
  • the heat sink is connected to the other end of the motor shaft opposite to the end for connecting the load.
  • the heat sink is a circular, rectangular, elliptical, polygonal, or irregularly shaped sheet centered on the axis of the motor shaft.
  • the heat sink covers at least one of the motor shaft, the stator and the rotor in a projection along the axis of the motor shaft.
  • At least one of the two opposite surfaces of the heat sink along the axis of the motor shaft is a flat surface.
  • At least one of the two opposite surfaces of the heat sink in the axial direction of the motor shaft is provided in an uneven shape.
  • At least one of the two opposite surfaces of the heat sink along the axial direction of the motor shaft is provided with an arch-shaped protrusion.
  • recesses or through holes are provided on the heat sink.
  • ribs are provided on at least one of the two opposite surfaces of the heat sink along the axis of the motor shaft.
  • At least a part of the ribs extends in a direction away from the motor shaft, and the height of the ribs relative to the surface of the heat sink is not greater than twice the thickness of the heat sink.
  • the thickness of the heat sink is in the range of 1 mm to 10 mm.
  • the motor assembly further includes a bracket on which the motor is mounted, and the motor shaft passes through the bracket, wherein the side of the bracket away from the motor is The heat sink is provided between the bracket and the stator and at least one of the sides of the stator facing away from the bracket.
  • the heat sink is provided on the outside of the overall structure of the motor.
  • the oven according to the second aspect of the present application includes: a box body with a cooking cavity, and the above-mentioned motor assembly is provided on the box body.
  • Fig. 1 is a schematic diagram of a motor assembly according to an embodiment of the present application.
  • Fig. 2 is a side view of the motor assembly shown in Fig. 1 when viewed in a direction perpendicular to the motor shaft.
  • Fig. 3 is a schematic diagram of a motor assembly, a heating fan, and a heating element according to an embodiment of the present application.
  • motor assembly 1 motor 11, heat sink 12, stator 111, rotor 112, motor shaft 113, bracket 13, back plate 2, heating fan 31, heating element 32.
  • the motor assembly 1 includes: a motor 11 and a heat sink 12.
  • the motor 11 serves as a power output device, and the heat sink 12 can be used to dissipate heat to the motor 11.
  • the motor assembly 1 can be used in appliances such as ovens.
  • the motor 11 includes a stator 111, a rotor 112, and a motor shaft 113 connected to the rotor 112.
  • the motor shaft 113 and the rotor 112 are connected together, and the motor shaft 113 rotates with the rotor 112, and the rotor 112 rotatably cooperates with the stator 111
  • the stator 111 can drive the rotor 112 to rotate, thereby driving the motor shaft 113 to rotate.
  • the motor shaft 113 can be used as a power output component to transmit the power of the motor 11 to predetermined components.
  • the heat sink 12 is connected to the motor shaft 113 of the motor 11, and the heat sink 12 is adapted to follow the motor shaft 113 to rotate, and the heat sink 12 extends in a direction perpendicular to the motor shaft 113.
  • the heat sink 12 connected to the motor shaft 113 can dissipate heat to the motor shaft 113, and after the heat is dissipated to the motor shaft 113, part of the heat at other locations on the motor 11 can also be dissipated through the heat sink 12.
  • a heat sink 12 is provided on the motor shaft 113, and the motor 11 can be dissipated through the heat sink 12, and since the heat sink 12 is connected to the motor shaft 113, the heat sink 12 follows the motor shaft 113 rotates, the heat sink 12 can exert a certain forced driving effect on the surrounding airflow, thereby dissipating the heat of the heat sink 12 more quickly. After the heat sink 12 dissipates heat, the heat on the motor shaft 113 and other components will also be transferred to On the heat sink 12, the heat of the motor 11 is gradually dissipated.
  • the heat sink 12 is used to replace the fan that dissipates heat to the motor 11. Compared with the fan, the wind resistance of the heat sink 12 is smaller, that is, the motor 11 drives the heat sink 12 to rotate and consumes less energy. Therefore, It can effectively realize energy saving and reduce energy consumption.
  • the motor assembly 1 of the present application is not provided with a fan for dissipating heat to the motor 11.
  • the end of the motor shaft 113 (the end connected to the load on the motor shaft 113) will extend into the oven, and the end of the motor shaft 113 will be connected
  • the heating fan 31 and the motor shaft 113 extend into the inside of the oven.
  • the heat generated by the heating elements inside the oven will inevitably be transferred to the motor shaft 113.
  • the heat in the motor 11 mainly comes from the motor shaft 113. Therefore, the heat will be dissipated.
  • the fin 12 is connected to the motor shaft 113, which can effectively dissipate the heat of the motor shaft 113.
  • the heat of the motor shaft 113 is reduced, which will also cause other heat in the motor 11 (motor 11 The heat generated during operation) is transferred to the motor shaft 113, and can also be dissipated through the heat sink 12.
  • the heat sink 12 extends in a direction perpendicular to the motor shaft 113, during the rotation of the motor shaft 113, the airflow hinders the heat sink 12 less, therefore, the load of the motor 11 can be effectively reduced, and No cooling fan is used, and the motor 11 only needs to drive the load fan (such as the heating fan 31 in the oven) housing, which can effectively reduce the noise of the motor assembly 1.
  • the heat sink 12 may be provided at different positions of the motor 11, or the heat sink 12 may be provided only at a predetermined position on the motor 11. Since the wind resistance of the heat sink 12 is relatively small, the load on the motor 11 is relatively high. The problem of excessive load on the motor 11 will not occur if multiple heat sinks 12 are provided.
  • a heat sink 12 may be provided on the inner side of the end of the motor shaft 113 for connecting the load.
  • the heat sink 12 is provided between the rotor 112 (or the stator 111) and the load.
  • a heat sink 12 may be connected to the other end of the motor shaft 113 opposite to the end for connecting the load.
  • the oven Take the oven as an example.
  • the load connected to the end of the motor shaft 113 is the heating fan 31, and the heat sink 12 can be arranged between the heating fan 31 and the rotor 112 (or the stator 111).
  • the radiating fins 12 can achieve a certain heat dissipation effect, and because the radiating fins 12 prevent heat radiation, it can also reduce the heat radiated to the motor 11 from the internal space of the oven.
  • the heat sink 12 will have a larger contact area with the outside air of the oven, which can further improve the heat dissipation effect.
  • the heat sink 12 can also be arranged in other positions in this application, for example, at the middle position of the motor shaft 113, etc.
  • the number of heat sink 12 is not limited in this application, and space conditions allow In the same case, two or more heat sinks 12 can be provided.
  • the heat sink 12 is used in this application to replace the heat dissipation fan that dissipates heat to the motor 11.
  • One of the purposes is to reduce the load of the motor 11. Compared with the heat dissipation fan, the motor 11 drives the heat sink 12 to rotate. Small, energy saving and environmental protection.
  • the heat sink 12 in the present application can be set in a circular shape, the wind resistance of the circular heat sink 12 during rotation is smaller, and the heat exchange area between the heat sink 12 and the air Will not reduce, so as to achieve the purpose of retaining the heat dissipation capacity to a certain extent while reducing the load.
  • the heat sink 12 is arranged to be centered on the axis of the motor shaft 113
  • the peripheral surface of the heat sink 12 is set in the form of a smooth curved surface, which can ensure that the load on the motor 11 is sufficiently small.
  • the heat sink 12 may be centered on the axis of the motor shaft 113, and similarly, the heat sink 12 may be disposed relative to the motor shaft 113.
  • the heat sink 12 covers at least one of the motor shaft 113, the stator 111, and the rotor 112 in a projection along the axial direction of the motor shaft 113.
  • the heat sink 12 may have different heat dissipation areas. For example, when the heat generated by the oven or the motor 11 is large, a larger heat sink 12 may be provided to increase the heat dissipation area.
  • the airflow around the heat sink 12 will inevitably be driven (for example, under the effect of the air flow, the air around the heat sink 12 can be driven by the heat sink 12). Therefore, by setting the coverage area of the heat sink 12, the range of air driven by the heat sink 12 can be changed.
  • the position of the rotor 112 of the motor 11 is covered by the heat sink 12.
  • the heat sink 12 drives the air flow.
  • the size of the heat sink 12 determines the range of air that it can drive.
  • the heat sink 12 covers the projection The rotor 112, therefore, the airflow range driven by the heat sink 12 will also cover the rotor 112 of the motor 11, so that effective heat dissipation of the motor 11 can be realized.
  • the heat sink 12 will also cover different areas.
  • the motor 11 may also include a housing.
  • the projection of the heat sink 12 along the axis of the motor shaft 113 can also cover the motor 11 shell.
  • At least one of the two opposite surfaces of the heat sink 12 in the axial direction of the motor shaft 113 is a plane.
  • one side surface of the heat sink 12 is set as a plane, the resistance of the airflow to the heat sink 12 will be greatly reduced during the rotation of the heat sink 12, which effectively reduces the load of the motor 11.
  • both sides of the heat sink 12 can be set in a flat form, and the peripheral surface of the heat sink 12 can also be set in a smooth curved surface. At this time, the air resistance to the heat sink 12 will be minimized.
  • At least one of the two opposite surfaces of the heat sink 12 in the axial direction of the motor shaft 113 is provided in an uneven shape. That is to say, at least one surface of the heat sink 12 is provided with a concave or convex shape. At this time, during the rotation of the heat sink 12, the concave and convex shapes will effectively drive the airflow, and the concave or convex shape The heat exchange efficiency between the convex position and the air is higher, so that the heat exchange efficiency between the heat sink 12 and the air can be effectively improved.
  • the setting and the height of the protrusions on the heat sink 12 need to be set reasonably to prevent the influence of air from obstructing the heat sink 12, thereby causing the load of the motor 11 to increase. Therefore, in this application, the height of the protrusion on the heat sink 12
  • the height of the protrusion should be within a reasonable range.
  • the height of the protrusion on the heat sink 12 is set to be in the range of 0 to 2h, where h is the thickness of the heat sink 12.
  • the height of the protrusions on the heat sink 12 is 1 mm, 2 mm, 3 mm, or the like.
  • At least one of the two opposite surfaces of the heat sink 12 along the axial direction of the motor shaft 113 is provided with an arch-shaped protrusion. That is to say, an arch structure is provided on the heat sink 12, both ends of the arch structure are connected to the main body of the heat sink 12, and the middle position of the arch structure is spaced from the heat sink 12. At this time, the arch structure is the same It can effectively improve the forced driving effect of the heat sink 12 on the airflow, and a hole through which the air can pass is formed between the arched structure and the heat sink 12, which can improve the heat exchange efficiency between the heat sink 12 and the air, and The power required for the rotation of the heat sink 12 is effectively reduced.
  • the through hole formed between the aforementioned arch-shaped protrusion and the main body of the heat sink 12 extends along the direction of the heat exchange motor shaft 113.
  • the through holes provided on the heat sink 12 are provided on the end surface of the heat sink 12, and may also be provided on the peripheral surface of the heat sink 12, that is, the through holes on the heat sink 12 may be provided along the motor shaft 113. It can also be arranged on the surface of the heat sink 12 surrounding the motor shaft 113 on the opposite sides of the surface.
  • the contact area between the heat sink 12 and the air can be further increased, and the heat dissipation efficiency and effect can be effectively improved.
  • ribs are provided on at least one of the two opposite surfaces of the heat sink 12 along the axial direction of the motor shaft 113. Provision of ribs on the heat sink 12 can effectively increase the contact area between the heat sink 12 and the surrounding air. Moreover, the ribs can also play a role in forcibly driving air flow, thereby further improving the efficiency of heat exchange.
  • the ribs can be arranged in a direction surrounding the motor shaft 113, for example, the ribs are arranged in a ring shape centered on the axis of the motor shaft 113. At this time, the ribs will not hinder the rotation of the heat sink 12, and also In other words, the load of the motor 11 will not be increased.
  • the ribs extends in a direction away from the motor shaft 113.
  • the ribs may affect the load of the motor 11. Therefore, the load of the motor 11 can be reduced by limiting the height of the ribs, for example,
  • the ribs are arranged such that the height relative to the surface of the heat sink 12 is not more than twice the thickness of the heat sink 12.
  • the height of the ribs can be 0.1 times, 0.2 times, 0.3 times, 0.5 times, 0.8 times, 1.2 times, 3 times, etc., the thickness of the heat sink 12. In these settings, the heat dissipation effect and the load of the motor 11 can be achieved. Balance.
  • the thickness of the heat sink 12 is in the range of 1 mm to 10 mm.
  • the thickness of the heat sink 12 is 0.5 mm, 1 mm, 5 mm, 15 mm, etc.
  • the heat sink is clamped by two planes perpendicular to the motor axis, and the two planes do not overlap with the heat sink, and the minimum distance between the two planes is in the range of 1 mm to 15 mm.
  • the motor assembly 1 further includes: a bracket 13, the motor 11 is placed on the bracket 13, and the motor shaft 113 passes through the bracket 13, wherein the side of the bracket 13 facing away from the motor 11 is between the bracket 13 and the stator 111 And at least one of the sides of the stator 111 facing away from the bracket 13 is provided with a heat sink 12.
  • the motor 11 can be directly supported. At this time, the radial torque of the motor shaft 113 can be reduced, thereby ensuring that the motor shaft 113 can run stably.
  • the heat sink 12 is provided on the outside of the overall structure of the motor 11.
  • the motor 11 includes a housing, and the heat sink 12 is arranged on the outside of the housing.
  • the heat sink 12 can better exchange heat with the outside air of the motor 11, effectively improving the heat exchange efficiency.
  • the heat sink 12 can also be arranged inside the motor 11.
  • a through hole can be provided on the housing of the motor 11 to communicate the inner and outer spaces of the motor 11, so as to realize the effective heat dissipation of the heat sink 12.
  • the oven according to the second aspect of the present application includes: a box body with a cooking cavity, and the above-mentioned motor assembly 1 is provided on the box body.
  • the motor shaft 113 of the motor 11 extends into the inside of the back plate 2 of the box.
  • a heating fan 31 and a heating element 32 are arranged inside the back plate 2 of the box. When the heating element 32 is energized to generate heat, the fan can generate heat. The heat of the element 32 is sent out, thereby achieving the effect of hot air heating.
  • the heating element 32 may be arranged around the heating fan 31.
  • the heating element is a heating tube
  • the heating tube includes a first section, a second section, a third section, a fourth section, and a fifth section that are sequentially connected around the heating fan 31, wherein the middle of the second section Part of it is convex toward the fourth section, and the middle position of the fourth section is convex toward the second section.
  • Both ends of the third section are respectively connected to one end of the second section and one end of the fourth section, and one end of the first section is connected to the second section.
  • the other end of the fifth section is connected to the other end of the fourth section, and the other end of the first section and the other end of the fifth section extend in opposite directions as electrodes.
  • the third section can be connected to the first and the The five segments are parallel, and the first and fifth segments can be collinear with the central axis.
  • the application belongs to the technical field of kitchen appliances, and relates to a heat dissipation structure of a driving motor 11 of an electric oven hot fan with a hot air grill function.
  • One of the key indicators of the driving motor 11 of the hot fan is the temperature rise of the motor 11.
  • the heat dissipation of the motor 11 is the key technology to solve the temperature rise of the motor 11.
  • the present application designs a new heat dissipation structure for the motor 11 based on the above method (1).
  • the present application solves the technical problem of heavy load and low efficiency of the motor 11 caused by the cooling fan of the motor 11; solves the technical problem of the overall size and high cost of the motor shaft 113 caused by the cooling fan; solves the problem of the motor 11 caused by the cooling fan Technical problems with high vibration and noise.
  • the technical solution of the present application is based on the original motor assembly 1 by removing the heat dissipation fan, and correspondingly reducing the height of the motor assembly 1, and adding a fixed at the end of the shaft of the motor 11 (the end facing away from the load)
  • the heat sink 12 on the rotating shaft, the heat sink 12 can be welded to the rotating shaft of the motor 11, and rotate with the rotating shaft, as shown in the figure.
  • the heat dissipation principle of the technical solution of the present application is that through the rotation of the heat sink 12, forced convection can be formed with the air around the motor 11, and the heat generated by the winding of the motor 11 can be transferred to the heat sink 12 through the rotating shaft, and then the heat dissipation method is forced convection.
  • the heat of the heat sink 12 is transferred to the surrounding air.
  • the heat source of the motor 11 in the back hot air system is not only its own winding, but also more from the back heating tube.
  • This part of the heat is mainly through the heat conduction method of the motor 11 shaft, and the heat of the heating tube is transferred to the motor through the shaft. 11. Therefore, the heat sink 12 fixed on the rotating shaft can effectively dissipate this part of the heat directly through forced convection heat dissipation before the rotating shaft is transferred to the windings of the motor 11.
  • the technical solution of the present application does not include the motor 11 cooling fan, which can effectively reduce the load of the motor 11 due to the cooling fan, reduce the output power consumption of the motor 11, and improve the efficiency of the motor 11;
  • the technical solution does not include a cooling fan, so that the height of the bracket 13 of the motor 11 can be reduced by 20 mm, the overall axial size of the motor 11 is reduced, the cost is reduced, and the hot air system is reduced in size;
  • There is only one heating fan 31 on the side shaft which reduces the requirement for dynamic balance of the motor shaft 113, and can reduce the noise of the motor 11 caused by the vibration of the motor shaft 113.
  • a heat sink 12 is added to the motor shaft 113. The heat sink 12 rotates with the motor shaft 113, so that the heat introduced to the motor shaft 113 by the heating tube and the heat generated by the motor 11 itself are dissipated by the forced convection heat dissipation method of the heat sink 12 .
  • the key technical point of this application is to remove the heat dissipation fan of the motor 11 and add the heat sink 12, and the point to be protected is the heat dissipation method and heat dissipation structure of the motor 11 that does not require a heat dissipation fan.
  • first and second are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with “first” and “second” may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality of” means at least two, such as two, three, etc., unless specifically defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two components or the interaction relationship between two components, unless otherwise specified The limit.
  • installed can be a fixed connection or a detachable connection , Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, it can be the internal communication of two components or the interaction relationship between two components, unless otherwise specified The limit.
  • the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • the “on” or “under” of the first feature on the second feature may be in direct contact with the first and second features, or indirectly through an intermediary. contact.
  • the "above”, “above” and “above” of the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the level of the first feature is higher than the second feature.
  • the “below”, “below” and “below” of the second feature of the first feature may mean that the first feature is directly below or obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.

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

Abstract

L'invention concerne un ensemble moteur électrique (1) et un four. L'ensemble moteur électrique (1) comprend un moteur électrique (11) et un dissipateur thermique (12). Le moteur électrique (11) comprend un stator (111), un rotor (112) et un arbre de moteur électrique (113) relié au rotor (112), le rotor (112) ajustant de manière rotative le stator (111) ; le dissipateur thermique (12) est relié à l'arbre de moteur électrique (113) du moteur électrique (11), le dissipateur thermique (12) est conçu pour tourner conjointement avec l'arbre de moteur électrique (113) et le dissipateur thermique (12) s'étend dans une direction perpendiculaire à l'arbre de moteur électrique (113).
PCT/CN2019/122723 2019-03-01 2019-12-03 Ensemble moteur électrique et four WO2020177415A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910157564.9 2019-03-01
CN201910157564.9A CN110022032B (zh) 2019-03-01 2019-03-01 电机组件和烤箱

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WO2020177415A1 true WO2020177415A1 (fr) 2020-09-10

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CN110022032B (zh) * 2019-03-01 2021-05-25 广东美的厨房电器制造有限公司 电机组件和烤箱

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CN202309269U (zh) * 2011-11-10 2012-07-04 中山大洋电机股份有限公司 一种交流电机转子组件
CN202424409U (zh) * 2011-12-29 2012-09-05 中山大洋电机股份有限公司 一种新型的转子散热结构
CN204156668U (zh) * 2014-09-09 2015-02-11 余姚市梨洲机电制造有限公司 一种散热滚罩极电机
CN204559320U (zh) * 2015-03-24 2015-08-12 陈建发 一种电机
CN206272387U (zh) * 2016-11-08 2017-06-20 余姚市宏阳微电机有限公司 一种高性能无刷直流电机
CN110022032A (zh) * 2019-03-01 2019-07-16 广东美的厨房电器制造有限公司 电机组件和烤箱

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