Direct-current brushless motor with external motor driving board

Abstract

The utility model relates to a direct current brushless motor with an external motor driving board. One end of the direct current brushless motor with the external motor driving board is provided with a stator structure. A rotor structure is movably connected in the stator structure; the exterior of the stator structure is connected with a motor driving plate through a cable; the motor driving plate is arranged outside the stator structure and controls the rotor structure to rotate. The technical effects of no mutual influence in a normal-temperature environment or a high-temperature environment area far away from the motor body, long service life and low use cost are achieved, and the technical problems that when an existing direct-current brushless motor is used in a plurality of high-temperature use environments such as a wall-hanging stove, a motor driving plate of the direct-current brushless motor is placed in the motor, and the motor driving plate cannot be used in the wall-hanging stove and the like are solved. The technical problems that the temperature of the motor driving board is too high in a high-temperature use environment, the service life of the motor driving board is sharply shortened, the whole motor is often scrapped, and the use cost is high are solved.

Description

Technical Field

[0001] The embodiment of the utility model relates to a brushless DC motor, in particular to a brushless DC motor with an external motor drive board. Background Art

[0002] When the existing brushless DC motor is used in multiple high-temperature environments such as wall-mounted boilers, since the motor driver board of the brushless DC motor is placed inside the motor, the temperature of the motor driver board is too high in the high-temperature environment, and the service life of the motor driver board is drastically shortened, often causing the entire motor to be scrapped, making the use cost expensive. Utility Model Content

[0003] The purpose of the implementation mode of the utility model is to provide a brushless DC motor with an external motor drive board which is arranged in a normal temperature environment or away from a high temperature environment area of ​​a motor body without affecting each other and has a long service life and low use cost.

[0004] In order to achieve the above object, the embodiment of the utility model designs a DC brushless motor with an external motor drive board, comprising:

[0005] A stator structure, which is arranged at one end of the DC brushless motor of the external motor drive board;

[0006] a rotor structure, movably connected to the rotor structure within the stator structure;

[0007] A motor drive board is connected to the motor drive board outside the stator structure through a cable; the motor drive board is outside the stator structure to control the rotation of the rotor structure.

[0008] Furthermore, in the brushless DC motor with an external motor drive board of the utility model, the motor drive board is connected to the stator structure via a flat cable.

[0009] Furthermore, in the brushless DC motor of the external motor drive board of the utility model, the stator structure further includes:

[0010] A motor housing, the motor housing being arranged on one side of the stator structure;

[0011] A magnet is fixed inside the motor housing by gluing;

[0012] Bushings are fixed on the motor housing by interference fit.

[0013] A first bearing, the first bearing being placed at the bottom of the motor housing;

[0014] A spring is placed between the first bearing and the motor housing;

[0015] An end cover is fixed above the motor housing;

[0016] A second bearing, the second bearing is placed above the end cover;

[0017] A stator core is fixed on the cylinder below the end cover by gluing;

[0018] An upper end plate of the motor is fixed on the upper side of the stator core by means of clearance fit;

[0019] The motor lower end plate is fixed below the stator core by means of clearance fit.

[0020] Furthermore, in the brushless DC motor of the external motor drive board of the utility model, the rotor structure further includes:

[0021] The motor shaft is arranged inside the stator structure; the motor shaft penetrates into the middle of the stator core of the stator structure.

[0022] Furthermore, in the DC brushless motor of the external motor drive board of the utility model, the two ends of the motor shaft are respectively fixed in the inner holes of the first bearing and the second bearing.

[0023] Furthermore, in the brushless DC motor of the external motor drive board of the utility model, one end of the motor shaft passes through from the bottom to the top below the end cover.

[0024] Furthermore, in the brushless DC motor of the external motor drive board of the utility model, a thread is arranged at one end of the motor shaft.

[0025] Furthermore, in the brushless DC motor of the external motor drive board of the utility model, a wind wheel is inserted into one end of the motor shaft and fixed with a nut and a steel gasket.

[0026] Furthermore, in the brushless DC motor with an external motor drive board of the utility model, heat insulating glue is poured on the outer side of the motor drive board.

[0027] Furthermore, in the DC brushless motor of the external motor drive board of the utility model, the motor drive board of the DC brushless motor of the external motor drive board is a PMW speed regulating motor drive board.

[0028] Compared with the prior art, the implementation method of the utility model adopts a stator structure set at one end of the DC brushless motor of the external motor drive board; the rotor structure is movably connected in the stator structure; the motor drive board is connected to the outside of the stator structure through a cable; the motor drive board is outside the stator structure to control the rotation of the rotor structure. In the utility model, the motor drive board is set outside the stator structure, so that there is no influence between the motors in a normal temperature environment or away from the high temperature environment area of ​​the motor body. At the same time, the technical effect of long service life and low cost is achieved, the temperature resistance of the motor is improved, so that the motor can be used in a higher temperature environment. The circuit board drive is separated from the motor control, and the split design is used, which is easier to disassemble. The motor drive board can be set in a normal temperature environment or away from the high temperature environment area of ​​the motor body, and there is no influence between them, making it more convenient for the motor to match the motor drive board. By reducing the Hall control method to save costs, the motor structure can be used in multiple high temperature use environments such as wall-mounted boilers, and can also be applied to other high temperature environments. Gear speed regulation or stepless speed regulation can be achieved, and the product functions are diversified and humanized. The invention solves the technical problem that when the existing brushless DC motor is used in multiple high-temperature environments such as wall-mounted boilers, the motor drive board of the brushless DC motor is placed inside the motor, resulting in the motor drive board being too hot in the high-temperature environment, the service life of the motor drive board is sharply shortened, and the entire motor is often scrapped, making the use cost expensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0030] Figure 2 for Figure 1 Explosion diagram. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0032] The embodiment of the utility model relates to a brushless DC motor with an external motor drive board, such as Figure 1 and Figure 2 As shown, including:

[0033] In this embodiment, a stator structure 100 is provided at one end of the DC brushless motor of the external motor driving board; the stator structure 100 mainly plays the role of magnetic flux, generating the necessary magnetic field of the DC brushless motor of the external motor driving board in this embodiment.

[0034] The rotor structure 200 is movably connected in the stator structure 100; the rotor structure 200 is mainly used for excitation and rotation;

[0035] The motor drive board 12 is connected to the outside of the stator structure 100 through a cable; the motor drive board 12 is outside the stator structure 100 to control the rotation of the rotor structure 200. The motor drive board 12 mainly plays the role of driving the DC brushless motor of the external motor drive board in this embodiment. In this embodiment, the motor drive board 12 is arranged outside the stator structure 100, so that it can be used in a normal temperature environment or away from the high temperature environment area of ​​the motor body without affecting each other. At the same time, the technical effect of long service life and low cost of use improves the temperature resistance of the motor, so that the motor in this embodiment can be used in a higher temperature environment. The motor drive board 12 is separated from the motor control and uses a split design, which is easier to disassemble. The motor drive board 12 can be set in a normal temperature environment or away from the high temperature environment area of ​​the motor body, without affecting each other, making it more convenient for the motor to match the motor drive board 12. By reducing the Hall control method to save costs, the motor structure can be used in multiple high temperature use environments such as wall-mounted boilers, and can also be applied to other high temperature environments, and can achieve gear speed regulation or stepless speed regulation, and the product functions are diversified and humanized. The invention solves the technical problem that when the existing brushless DC motor is used in multiple high-temperature environments such as wall-mounted boilers, the motor drive board of the brushless DC motor is placed inside the motor, resulting in the motor drive board being too hot in the high-temperature environment, the service life of the motor drive board is sharply shortened, and the entire motor is often scrapped, making the use cost expensive.

[0036] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, the motor drive board 12 is connected to the stator structure 100 via a flat cable 16. The flat cable 16 includes a power line and a control line.

[0037] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, the stator structure 100 further includes:

[0038] A motor housing 14 is disposed on one side of the stator structure 100 ; the motor housing 14 constitutes the outer shell of the brushless DC motor of the external motor drive board in this embodiment.

[0039] The magnet 13 is fixed inside the motor housing 14 by means of glue; the magnet 13 mainly provides a magnetic effect.

[0040] The shaft sleeves 15 are fixed on the motor housing 14 by interference fit; the shaft sleeves 15 mainly play the role of supporting the first bearing 10 .

[0041] A first bearing 10 is placed at the bottom of the motor housing 14 ; the first bearing 10 mainly supports the motor shaft 11 .

[0042] A spring 9 is placed between the first bearing 10 and the motor housing 14; the spring 9 mainly serves to absorb shock.

[0043] An end cover 5 is fixed above the motor housing 14 ; the end cover 5 is used to place the second bearing 4 .

[0044] A second bearing 4 is placed above the end cover 5 ; the second bearing 4 mainly serves to support the motor shaft 11 .

[0045] The stator core 7 is fixed on the cylinder below the end cover 5 by gluing; the stator core 7 mainly plays the role of excitation.

[0046] The motor upper end plate 6 is fixed on the stator core 7 by means of clearance fit;

[0047] The motor lower end plate 8 is fixed below the stator core 7 by means of clearance fit. The motor upper end plate 6 and the motor lower end plate 8 are used to fix the stator core 7.

[0048] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, the rotor structure 200 further includes:

[0049] A motor shaft 11 is arranged inside the stator structure 100, and the motor shaft 11 penetrates the middle of the stator core 7 of the stator structure 100. The motor shaft 11 mainly has a rotation function.

[0050] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, both ends of the motor shaft 11 are fixed in the inner holes of the first bearing 10 and the second bearing 4 respectively.

[0051] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, one end of the motor shaft 11 passes through the bottom of the end cover 5 and then goes up.

[0052] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, a thread is provided at one end of the motor shaft 11. The above structure is mainly used to fix the wind wheel 3.

[0053] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, the wind wheel 3 is inserted into one end of the motor shaft 11 and fixed with a nut 1 and a steel washer 2.

[0054] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, heat-insulating glue is poured on the outer side of the motor drive plate 12. It mainly plays a role of heat insulation.

[0055] In order to achieve the above technical effects, the brushless DC motor of the external motor drive board in this embodiment, such as Figure 1 and Figure 2 As shown, the motor driving board 12 of the brushless DC motor of the external motor driving board is a PMW speed regulating motor driving board.

[0056] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A brushless DC motor with an external motor drive board, characterized in that: include: A stator structure (100), wherein the stator structure (100) is arranged at one end of the DC brushless motor of the external motor drive board; A rotor structure (200) movably connected to the stator structure (100); A motor drive board (12) is connected to the motor drive board (12) outside the stator structure (100) via a cable; the motor drive board (12) is outside the stator structure (100) and controls the rotation of the rotor structure (200).

2. The brushless DC motor of the external motor drive board according to claim 1, characterized in that: The motor drive board (12) is connected to the stator structure (100) via a cable (16).

3. The brushless DC motor of the external motor drive board according to claim 1, characterized in that: The stator structure (100) further comprises: A motor housing (14), wherein the motor housing (14) is arranged on one side of the stator structure (100); A magnet (13), wherein the magnet (13) is fixed inside the motor housing (14) by gluing; A shaft sleeve (15), wherein the shaft sleeve (15) is fixed on the motor housing (14) by interference fit; A first bearing (10), the first bearing (10) being placed at the bottom of the motor housing (14); A spring (9), the spring (9) being placed between the first bearing (10) and the motor housing (14); An end cover (5), the end cover (5) being fixed above the motor housing (14); A second bearing (4), the second bearing (4) being placed above the end cover (5); A stator core (7), the stator core (7) being fixed on the cylinder below the end cover (5) by gluing; An upper end plate (6) of the motor is fixed on the upper side of the stator core (7) by means of clearance fit; The motor lower end plate (8) is fixed below the stator core (7) by means of clearance fit.

4. The brushless DC motor of the external motor drive board according to claim 1, characterized in that: The rotor structure (200) further comprises: A motor shaft (11), wherein the motor shaft (11) is arranged inside the stator structure (100); the motor shaft (11) penetrates into the middle of the stator core (7) of the stator structure (100).

5. The brushless DC motor of the external motor drive board according to claim 4, characterized in that: The two ends of the motor shaft (11) are respectively fixed in the inner holes of the first bearing (10) and the second bearing (4).

6. The brushless DC motor of the external motor drive board according to claim 5, characterized in that: One end of the motor shaft (11) passes through the bottom of the end cover (5) and then goes up.

7. The brushless DC motor of the external motor drive board according to claim 6, characterized in that: A thread is arranged at one end of the motor shaft (11).

8. The brushless DC motor of the external motor drive board according to claim 7, characterized in that: A wind wheel (3) is inserted into one end of the motor shaft (11) and fixed with a nut (1) and a steel washer (2).

9. The brushless DC motor of the external motor drive board according to claim 1, characterized in that: Heat-insulating glue is poured on the outer side of the motor drive plate (12).

10. The brushless DC motor with an external motor drive board according to any one of claims 1 to 7, characterized in that: The motor drive board (12) of the brushless DC motor of the external motor drive board is a PMW speed regulating motor drive board.

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