CN214959169U

CN214959169U - Electric machine

Info

Publication number: CN214959169U
Application number: CN202023351710.9U
Authority: CN
Inventors: 王洪林; 陈亮; 金明亮
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd; Midea Group Shanghai Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-11-30
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a motor, this motor includes the center pin, a stator, rotor and driver, the center pin is formed with the holding chamber, outside one of them cover of stator and rotor was located the center pin, outside one of them was located to another person cover, the driver sets up in the holding intracavity, be used for driving the relative stator of rotor and rotate, through setting up the driver in the holding intracavity of center pin, can avoid occupying the extra space of motor, make the overall structure of motor compacter, the size is littleer, occupation space is littleer, and then improve the operational reliability of motor, reduce the preparation degree of difficulty and the cost of motor.

Description

Electric machine

Technical Field

The utility model relates to the technical field of electric machines, in particular to motor.

Background

Motors have been widely used as a driving device in various electric devices such as robots, home appliances, and industries. When the motor runs, the rotor is generally required to be driven to rotate relative to the stator through the driver, so that the power output is realized.

The inventor of this application discovers in long-term research and development that the driver of present motor generally all sets up at the terminal surface or the side of stator and rotor, and the integrated level is relatively poor, and the axial or radial size that can make whole motor is great, and occupation space is great, and then the operational reliability that leads to the motor is lower, the preparation degree of difficulty and cost are also higher.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor to the integrated level of motor is relatively poor among the solution prior art, the great technical problem of occupation space.

In order to solve the above technical problem, the utility model discloses a technical scheme provide a motor, include:

the central shaft is provided with an accommodating cavity;

one of the stator and the rotor is sleeved outside the central shaft, and the other one of the stator and the rotor is sleeved outside the central shaft;

and the driver is arranged in the accommodating cavity and used for driving the rotor to rotate relative to the stator.

In a specific embodiment, the driver includes a main control board, a power board and a connector, the main control board and the power board are arranged at an interval, and the main control board is connected with the power board through the connector.

In a specific embodiment, the power board comprises a heat dissipation surface, and the heat dissipation surface is abutted with the inner wall of the central shaft.

In a specific embodiment, the power board includes a metal substrate, and the heat dissipation surface is a surface of the metal substrate; or

The power board is a packaging module, a metal heat dissipation plate is arranged on the outer surface of the packaging module, and the heat dissipation surface is the surface of the metal heat dissipation plate.

In one embodiment, the metal substrate or the metal heat dissipation plate is an aluminum plate.

In a specific embodiment, the motor further includes an encoder disposed in the accommodating chamber.

In a specific embodiment, the power plate includes a capacitive element, and the capacitive element is a ceramic capacitive element.

In a specific embodiment, the motor further includes an end cover and a permanent magnet, the end cover is disposed at one end of the central shaft, the permanent magnet is disposed at one side of the end cover close to the central shaft, and an opening is formed at the other end of the central shaft, so that the accommodating cavity is communicated with the outside.

In a specific embodiment, the motor further comprises a heat sink disposed on an inner sidewall of the central shaft.

In an embodiment, the motor further includes a heat dissipation element disposed in the accommodating chamber for accelerating heat dissipation from the accommodating chamber.

The utility model discloses the motor includes the center pin, the stator, rotor and driver, the center pin is formed with the holding chamber, outside one of them cover of stator and rotor was located the center pin, outside one of them was located to another cover, the driver sets up in the holding intracavity, be used for driving the relative stator of rotor and rotate, through setting up the driver in the holding intracavity of center pin, can avoid occupying the extra space of motor, make the overall structure of motor compacter, the size is littleer, occupation space is littleer, and then improve the operational reliability of motor, reduce the preparation degree of difficulty and the cost of motor.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of an embodiment of a motor according to the present invention;

fig. 2 is a schematic cross-sectional view of an embodiment of the motor of the present invention;

fig. 3 is a schematic cross-sectional view of another embodiment of the motor of the present invention;

fig. 4 is a partial structural schematic view of a central shaft in another embodiment of the motor of the present invention;

fig. 5 is a schematic cross-sectional structure diagram of another embodiment of the motor of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.

The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. While the term "and/or" is merely one type of association that describes an associated object, it means that there may be three types of relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Referring to fig. 1 and 2, an embodiment of the utility model discloses motor 10 includes center pin 100, stator 200, rotor 300 and driver 400, center pin 100 is formed with holding chamber 110, the stator 200 cover is located outside center pin 100, the stator 200 is located outside the rotor 300 cover, driver 400 sets up in holding chamber 110, be used for driving the relative stator 200 rotation of rotor 300, through setting up driver 400 in holding chamber 110 of center pin 100, can avoid occupying motor 10's extra space, make motor 10's overall structure compacter, the size is littleer, occupation space is littleer, and then improve motor 10's operational reliability, reduce motor 10's the preparation degree of difficulty and cost.

In other embodiments, the motor 10 may also be an inner rotor motor, that is, the rotor 300 is sleeved outside the central shaft 100, and the stator 200 is sleeved outside the rotor 300, which is not limited herein.

In this embodiment, the accommodating cavity 110 is formed in the middle of the central shaft 100, and the driver 400 is disposed in the accommodating cavity 110, so that the influence on the eccentric action possibly generated in the operation process of the motor 10 can be reduced, the operation of the motor 10 is more stable, and the reliability is higher.

In other embodiments, the accommodating cavity 110 may also be formed in the central shaft 100 at a position offset from the axis of the central shaft 100, which is not limited herein.

In this embodiment, the motor 10 further includes an end cover 500, the end cover 500 covers one end of the central shaft 100, and an opening 120 is formed at the other end of the central shaft 100, so that the accommodating cavity 110 is communicated with the outside, and further, heat in the accommodating cavity 110 is dissipated to the outside through the opening 120, and both the stator 200 and the driver 400 can be cooled, thereby improving the service power and the service life of the motor 10.

In other embodiments, the end cap 500 may also be provided with heat dissipation holes (not shown), the heat dissipation holes are communicated with the accommodating cavity 110, so that heat in the accommodating cavity 110 can be dissipated to the outside through the heat dissipation holes, thereby further improving the heat dissipation effect on the stator 200 and the driver 400, and the two ends of the central shaft 100 are communicated with the outside, thereby facilitating the formation of heat dissipation airflow flowing along the axial direction of the central shaft 100 in the accommodating cavity 110, and further improving the heat dissipation effect.

In this embodiment, the driver 400 includes a main control board 410, a power board 420 and a connector 430, the main control board 410 and the power board 420 are disposed at an interval, and the main control board 410 is connected to the power board 420 through the connector 430, so that the main control board 410 can control the power board 420 through the connector 430, thereby driving the rotation of the rotor 300. By separately arranging the main control board 410 and the power board 420 of the driver 400, the power board 420 can adopt a design mode with high power density, and further, the influence of the overhigh internal temperature rise of the central shaft 100 on the power board 420 in the operation process of the motor 10 can be reduced.

In the present embodiment, the main control board 410 includes a control circuit, a communication circuit (not shown in the figure), and the like. The control circuit may be a DSP (Digital Signal processing) control circuit.

In the present embodiment, the power board 420 includes the heat radiation surface 421, and the heat radiation surface 421 abuts against the inner wall of the center shaft 100, so that the heat radiation of the power board 420 can be further performed, and the power usage and the service life of the power board 420 can be further improved.

Specifically, the power board 420 includes a metal substrate, a main circuit, a detection circuit, a switching power supply circuit (not shown), and the like, which are disposed on the metal substrate, and can drive the rotor 300. The susceptor 130 is disposed in the central shaft 100, the metal substrate is disposed on the susceptor 130, and a surface of the metal substrate abutting against the susceptor 130 is a heat dissipation surface 421 of the power board 420.

In the present embodiment, the detection circuit may include a current detection circuit, an undervoltage and overvoltage detection circuit, a counter potential detection circuit, and the like.

In this embodiment, the through hole 131 is formed in the bearing table 130, so that a cavity enclosed by the bearing table 130 and the side wall of the central shaft 100 and used for accommodating the driver 400 can be communicated with the outside through the through hole 131, thereby preventing blocking of heat dissipation of the driver 400.

In this embodiment, the metal substrate may be an aluminum plate. In other embodiments, the metal substrate may also be a metal plate such as a copper plate, which is easy to dissipate heat, and is not limited herein.

In other embodiments, the power board 420 may also be a package module (not shown in the drawings), the main circuit, the detection circuit and the switching power supply circuit are all packaged in the package, a metal heat dissipation plate may be disposed on an outer surface of the package module, one side of the package module, on which the metal heat dissipation plate is disposed, is disposed near the carrier 130, and a surface of the metal heat dissipation plate, which is abutted to the carrier 130, is a heat dissipation surface of the power board 420.

In this embodiment, the metal heat dissipation plate may be an aluminum plate. In other embodiments, the metal heat sink may also be a metal plate that is easy to dissipate heat, such as a copper plate, and is not limited herein.

In other embodiments, a heat sink (not shown) may be disposed between the power board 420 and the carrier 130 for dissipating heat of the power board 420.

In the embodiment, the power board 420 includes a capacitor element (not shown), and the capacitor element is a ceramic capacitor element, which can improve the heat resistance and the service life of the power board 420 compared to an electrolytic capacitor element, and is beneficial to improve the applicability of the power board 420 to the high-temperature environment inside the central shaft 100.

In this embodiment, other components of the power board 420 and components of the main control board 410 may be industrial-grade or automotive-grade electronic components, which can improve the heat resistance and the service life of the power board 420 and the main control board 410, and is beneficial to improving the applicability of the power board 420 and the main control board 410 to the high-temperature environment inside the central shaft 100.

Wherein, the motor 10 further may include an encoder (not shown in the figure), the encoder is disposed in the accommodating chamber 110, and the control precision of the rotor 300 can be improved by disposing the encoder, so as to improve the reliability of the motor 10.

In this embodiment, the encoder may be integrated on the main control board 410, and does not occupy other spaces of the accommodating cavity 110, so that the structure of the motor 10 is more compact, the occupied space is smaller, the operation reliability of the motor 10 is facilitated, and the manufacturing difficulty and cost of the motor 10 are reduced.

In other embodiments, the encoder may be disposed on the power board 420 or at other positions in the accommodating chamber 110, which is not limited herein.

In this embodiment, the motor 10 further includes a permanent magnet 600, and the permanent magnet 600 is disposed on one side of the end cap 500 close to the central shaft 100, and is used for cooperating with a chip of an encoder to perform encoder position detection. Specifically, the permanent magnet 600 can rotate along with the rotor 300, and the chip of the encoder detects and samples the rotation of the permanent magnet 600, thereby realizing the precise control of the motor 10. In this embodiment, the main surfaces of the main control board 410 and the power board 420 are perpendicular to the axial direction of the central shaft 100, and the main control board 410 and the power board 420 are disposed at an interval along the axial direction of the central shaft 100, so that the power board 420 is disposed on the bearing table 130, and the driver 400 is more convenient to mount. And the air outlet of the heat dissipation element can be arranged relative to the power board 420, so as to achieve a better heat dissipation effect on the power board 420.

In other embodiments, the main surfaces of the main control board 410 and the power board 420 may also be disposed in parallel with the axial direction of the central shaft 100, the main control board 410 and the power board 420 are disposed at intervals along the axial direction of the central shaft 100, the heat dissipation element can form a heat dissipation airflow flowing along the axial direction of the central shaft 100 in the accommodating cavity 110, and the heat dissipation airflow can flow through the main surfaces of the main control board 410 and the power board 420 to dissipate heat from the main control board 410 and the power board 420, so as to further improve the heat dissipation effect, and further improve the service power and the service life of the motor 10.

Referring to fig. 3 and 4, in another embodiment, the motor 10 further includes a heat sink 140, and the heat sink 140 is disposed on an inner sidewall of the central shaft 100, so as to increase a heat dissipation speed inside the motor 10, improve a heat dissipation efficiency, and further improve a service power and a service life of the motor 10.

In this embodiment, the heat sink 140 may be a metal plate such as an aluminum plate or a copper plate, which can further improve heat dissipation efficiency.

In this embodiment, the number of the heat dissipation fins 140 is plural, and the plurality of heat dissipation fins 140 are uniformly arranged on the inner side wall of the central shaft 100 at intervals along the circumferential direction of the central shaft 100, so that the heat dissipation is more uniform and the heat dissipation speed is faster.

Referring to fig. 5, in another embodiment, the motor 10 may further include a heat dissipation element 700, and the heat dissipation element 700 is disposed in the accommodating chamber 110 for accelerating heat dissipation in the accommodating chamber 110.

In this embodiment, the heat dissipation element 700 may be a fan, which can generate a heat dissipation airflow in the accommodating cavity 110 to take out the heat in the accommodating cavity 110 through the opening 120.

In this embodiment, the fan is disposed on a side of the susceptor 130 away from the driver 400, so as to prevent the fan 700 from interfering with the driver 400, and ensure reliability of heat dissipation.

In this embodiment, a wire hole 710 may be further formed between the fan and the central shaft 100, and the connection wire 440 of the driver 400 may pass through the wire hole 710 to extend outside the motor 10.

In other embodiments, the heat dissipation element 700 may also be a bladeless fan, and the like, which is not limited herein.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An electric machine, comprising:

the central shaft is provided with an accommodating cavity;

2. The motor of claim 1, wherein the driver comprises a main control board, a power board and a connector, the main control board and the power board are arranged at a distance, and the main control board is connected with the power board through the connector.

3. The electric machine of claim 2, wherein the power plate includes a heat dissipating surface that abuts an inner wall of the central shaft.

4. The electric machine according to claim 3, wherein the power board comprises a metal substrate, and the heat dissipation surface is a surface of the metal substrate; or

5. The motor according to claim 4, wherein the metal substrate or the metal heat dissipation plate is an aluminum plate.

6. The motor of claim 1, further comprising an encoder disposed within the housing chamber.

7. The electric machine of claim 2, wherein the power plates comprise capacitive elements, the capacitive elements being ceramic capacitive elements.

8. The motor of claim 1, further comprising an end cap and a permanent magnet, wherein the end cap is disposed at one end of the central shaft, the permanent magnet is disposed at one side of the end cap close to the central shaft, and an opening is formed at the other end of the central shaft, so that the accommodating cavity is communicated with the outside.

9. The electric machine of claim 1 further comprising fins disposed on an inner sidewall of the central shaft.

10. The motor of claim 1, further comprising a heat dissipation element disposed within the housing chamber for accelerating the dissipation of heat within the housing chamber.