Small brushless motor

Abstract

The utility model discloses a small brushless motor, which belongs to the technical field of motor design and manufacture, and comprises a shell, a stator and a rotor are arranged in the shell, a plurality of groups of inner layer windings and a plurality of groups of outer layer windings are arranged in the stator, the plurality of groups of inner layer windings are made of small wire diameters, and the plurality of groups of outer layer windings are made of large wire diameters. A rotor is arranged between the shell and the stator and comprises a rotating assembly and a rotating shaft, the rotating assembly is located between the shell and the stator, the rotating shaft is rotationally connected into the shell, bearings are installed at the two ends of the rotating shaft, the bearing at one end is installed in the shell, and a position induction sensor is arranged in the stator. A plurality of permanent magnetic steels are arranged in the rotating assembly; when the brushless motor is used, the manufacturing cost can be obviously reduced, the small brushless motor with high-end performance is more popularized, the torque output during low-speed operation is enhanced, and the user experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor design and manufacturing, and in particular to a small brushless motor. Background Art

[0002] With technological advancements and growing societal demands, motors, as a crucial component of modern electromechanical systems, are experiencing continuous improvements in performance. In particular, in the context of energy conservation and environmental protection, brushless DC motors (Brushless DC) motors (Brushless DC) have become a new favorite in many industries due to their high efficiency, long lifespan, and low maintenance costs. Currently, the mainstream small Brushless DC motors on the market are primarily used in precision instruments, electronic products, and household appliances. These motors generally feature compact size, smooth operation, and precise control. Small Brushless Motors on the market primarily fall into two categories: permanent magnet synchronous motors (PMSMs) and induction motors. PMSMs utilize high-performance rare earth permanent magnets, which not only improve overall efficiency but also reduce starting current, enabling fast response and smooth operation. However, these motors are relatively expensive, and the permanent magnets can demagnetize with temperature. In contrast, while induction motors are less expensive, they exhibit poor torque characteristics at low speeds and are less efficient than PMSMs. Other approaches to improving motor performance include improving winding design. For example, adopting centralized windings instead of distributed windings can effectively reduce copper and iron losses, thereby improving overall motor efficiency. However, this approach often comes with increased motor design complexity.

[0003] Existing small brushless motors have some common problems, including high cost, unstable performance in high temperature environments, and poor torque performance at low speeds. These problems limit their application and development in a wider range of fields. Utility Model Content

[0004] In response to the shortcomings of the existing technology, this application provides a small brushless motor that overcomes the shortcomings of the existing technology and aims to solve some common problems of existing small brushless motors in the existing technology, including high cost, unstable performance in high temperature environment, poor torque performance at low speed, etc. These problems limit their application and development in a wider range of fields.

[0005] To achieve the above object, the application provides the following technical scheme: a small brushless motor, comprising a shell, the inside of the shell is provided with a stator and a rotor, the inside of the stator is provided with a plurality of inner layer windings and a plurality of outer layer windings, the material of the plurality of inner layer windings is thin wire diameter, the material of the plurality of outer layer windings is thick wire diameter, the rotor is arranged between the shell and the stator, the rotor comprises a rotating assembly and a rotating shaft, the rotating assembly is located between the shell and the stator, the rotating shaft is rotatably connected to the inside of the shell, the bearings are mounted on both ends of the rotating shaft, one of the bearings is mounted in the inside of the shell, the inside of the stator is provided with a position sensing sensor, and the inside of the rotating assembly is provided with a plurality of permanent magnet steels.

[0006] By adopting the above technical scheme, the plurality of inner layer windings and the plurality of outer layer windings are arranged on the stator, so that the windings in the inside of the stator are divided into a double-layer structure, the outer layer windings can provide a stronger magnetic field, the inner layer windings can effectively improve the efficiency, the plurality of magnet steels in the inside of the rotating assembly are arranged at a specific angle to optimize the magnetic field distribution, the position sensing sensor is responsible for detecting the position of the rotating assembly and feeding back the position signal to the controller to accurately adjust the current phase, so as to realize smooth starting and efficient operation. When the motor receives power input in use, the controller sends instructions according to the position signal fed back by the position sensing sensor, so that the inner layer windings and the outer layer windings in the inside of the corresponding stator are electrified to generate a magnetic field, thereby driving the rotor to rotate. With the rotation of the rotor, the position sensing sensor constantly updates the position information, and the controller dynamically adjusts the on-off state of each inner layer winding and outer layer winding to maintain the optimal operating state of the motor. This can significantly reduce the manufacturing cost, make the high-end performance small brushless motor more popular, enhance the torque output during low-speed operation, and improve the user experience.

[0007] As a preferred technical scheme of the application, the material of the inner layer windings and the outer layer windings is copper, the material of the rotating assembly is neodymium iron boron, and the position sensing sensor is a Hall effect element.

[0008] By adopting the above technical scheme, the coil material used in the stator is selected to be copper, which can effectively reduce the resistance loss; the rotor is selected to be made of neodymium iron boron material, which has high magnetic strength; and the position sensing sensor is a Hall effect element, which has high precision and good stability.

[0009] As a preferred technical scheme of the application, the outside of the shell is sleeved with a heat plate, a plurality of heat dissipation fins are mounted on the outside of the heat plate, and the intervals between the plurality of heat dissipation fins are the same.

[0010] By adopting the technical scheme, the heat conduction of the heat conduction plate can be uniform when the heat conduction plate is used.

[0011] As a preferred technical scheme of the present application, the rotating shaft is provided with a clamping groove at one end, and a clamping ring is installed in the clamping groove.

[0012] By adopting the technical scheme, the clamping ring can be clamped in the clamping groove to fix the rotor and prevent it from falling out during operation, thereby improving the stability of the motor.

[0013] As a preferred technical scheme of the present application, the material of the shell is aluminum alloy, and the material of the heat dissipation fin is copper.

[0014] By adopting the technical scheme, the material of the shell is aluminum alloy, which can further reduce the weight of the motor and effectively improve the heat dissipation efficiency.

[0015] As a preferred technical scheme of the present application, the rotating shaft is provided with an installation block, the installation block is fixedly connected with one of the bearings, and two installation plates are installed on the outside of the installation block.

[0016] By adopting the technical scheme, the installation plates can further improve the convenience of motor installation and facilitate the subsequent expansion of the motor, thereby improving the practicability of the device.

[0017] As a preferred technical scheme of the present application, one of the installation plates is provided with a plurality of connection blocks, the connection blocks are in abutment with the other installation plate, and a plurality of installation screw holes are arranged in the two installation plates.

[0018] By adopting the technical scheme, the connection blocks can better fix the two installation plates, and the installation screw holes can make the installation process more convenient and improve the installation efficiency.

[0019] The present application has the following advantages:

[0020] 1. By setting the stator, in use, the set of inner and outer windings can divide the internal winding of the stator into a double-layer structure, the external outer winding can provide a stronger magnetic field, and the internal inner winding can effectively improve the efficiency. The multiple magnetic steels inside the rotating assembly are arranged at a specific angle to optimize the magnetic field distribution. The position sensing sensor is responsible for detecting the position of the rotating assembly and feeding back to the controller to accurately adjust the current phase, achieving smooth start and efficient operation. When the motor receives power input in use, the controller issues instructions according to the position signal feedback from the position sensing sensor, so that the corresponding inner and outer windings inside the stator are energized to generate a magnetic field, which in turn drives the rotor to rotate. With the rotation of the rotor, the position sensing sensor constantly updates the position information, and the controller dynamically adjusts the on-off state of each inner and outer winding accordingly to maintain the optimal operating state of the motor. This can significantly reduce manufacturing costs, making high-end performance small brushless motors more popular, and enhancing the torque output at low speed and improving user experience.

[0021] 2. The stator uses copper wire as the coil material, which can effectively reduce resistance loss; the rotor uses neodymium iron boron material, which has high magnetic strength; the position sensing sensor is a Hall effect element with high precision and good stability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the internal structure diagram of the present application;

[0023] Figure 2 is the mounting block structure diagram of the present application;

[0024] Figure 3 is the front structure diagram of the present application;

[0025] Figure 4 is the back structure diagram of the present application.

[0026] In the figure: 1, the shell; 2, the stator; 201, the inner winding; 202, the outer winding; 3, the rotor; 301, the rotating assembly; 302, the shaft; 303, the clamping groove; 304, the clamping ring; 305, the bearing; 4, the mounting block; 401, the mounting plate; 402, the mounting screw hole; 403, the connecting block; 5, the heat sink; 501, the heat dissipation fin; 6, the position sensing sensor. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] Reference Figures 1-3 A small brushless motor includes a housing 1, with a stator 2 and a rotor 3 disposed within the housing 1. The stator 2 is provided with multiple sets of inner windings 201 and multiple sets of outer windings 202. The multiple sets of inner windings 201 are made of fine wire, while the multiple sets of outer windings 202 are made of thick wire. A rotor 3 is disposed between the housing 1 and the stator 2. The rotor 3 includes a rotating assembly 301 and a rotating shaft 302. The rotating assembly 301 is located between the housing 1 and the stator 2. The rotating shaft 302 is rotatably connected to the interior of the housing 1. Bearings 305 are mounted at both ends of the rotating shaft 302, with the bearing 305 at one end being mounted within the housing 1. A position sensing sensor 6 is disposed within the stator 2. Multiple permanent magnets are disposed within the rotating assembly 301. A heat spreader 5 is sleeved onto the exterior of the housing 1. Multiple sets of heat sink fins 501 are mounted on the exterior of the heat spreader 5. The multiple sets of heat sink fins 501 are spaced evenly apart.

[0029] By setting up the stator 2, when in use, the multiple groups of inner windings 201 and outer windings 202 set up can divide the internal windings of the stator 2 into a double-layer structure. The outer outer winding 202 can provide a stronger magnetic field, and the inner inner winding 201 can effectively improve efficiency. The multiple magnets inside the rotating component 301 are arranged at a specific angle to optimize the magnetic field distribution. The position sensing sensor 6 is responsible for detecting the position of the rotating component 301 and feeding back to the controller to accurately adjust the current phase to achieve smooth start-up and efficient operation. When the motor receives power input during use, the controller issues an instruction based on the position signal fed back by the position sensing sensor 6, so that the corresponding inner winding 201 and outer winding 202 inside the stator 2 are energized to generate a magnetic field, thereby driving the rotor 3 to rotate. As rotor 3 rotates, position sensor 6 continuously updates position information, and the controller dynamically adjusts the on / off state of each inner winding 201 and outer winding 202 accordingly to maintain the optimal operating state of the motor. This significantly reduces manufacturing costs, makes high-end performance small brushless motors more popular, enhances torque output at low speeds, and improves the user experience. By providing a heat spreader 5, when in use, the heat spreader 5 can achieve uniform heat conduction within the housing 1, and the provided heat dissipation fins 501 can further improve the heat dissipation efficiency.

[0030] Reference Figure 1The material of the inner winding 201 and the outer winding 202 is copper, the material of the rotating assembly 301 is neodymium iron boron, and the position sensing sensor 6 is a Hall effect element; one end of the rotating shaft 302 is provided with a clamping groove 303, and the clamping groove 303 is internally provided with a clamping ring 304; the rotating shaft 302 is externally provided with a mounting block 4, the mounting block 4 is fixedly connected with the outer part of one of the bearings 305, and the mounting block 4 is externally provided with two groups of mounting plates 401; the coil material used by the stator 2 is selected to be copper, which can effectively reduce the resistance loss; the rotor 3 is selected to be made of neodymium iron boron material, which has a high magnetic strength; the position sensing sensor 6 is a Hall effect element, which has high precision and good stability; by arranging the clamping groove 303, the clamping ring 304 can be clamped in the clamping groove 303 during use, so as to fix the rotor 3 and prevent it from falling out during operation, thereby improving the stability of the motor operation; by arranging the mounting block 4, the mounting plates 401 can further improve the convenience of motor installation during use, and are conducive to the subsequent application of more expansion structures to the motor, thereby improving the practicability of the device.

[0031] With reference to Figure 1 The material of the shell 1 is aluminum alloy, and the material of the heat dissipation fin 501 is copper; the material of the shell 1 is aluminum alloy, which can further reduce the weight of the motor and effectively improve the heat dissipation efficiency; the material of the heat dissipation fin 501 is copper, which has good thermal conductivity and is conducive to more quickly dissipating the heat inside the motor, thereby improving the stability of the motor operation under high temperature; the outer part of one of the mounting plates 401 is provided with a plurality of connecting blocks 403, the plurality of connecting blocks 403 are in abutment with the other mounting plate 401, and the inner part of the two mounting plates 401 is provided with a plurality of mounting screw holes 402; by arranging the connecting blocks 403, the fixing effect between the two mounting plates 401 can be better achieved during use, and the mounting screw holes 402 can make the mounting process more convenient and improve the mounting efficiency.

[0032] Working principle: by setting the stator 2, in use, the set of inner and outer windings 201 and 202 can divide the internal winding of the stator 2 into a double-layer structure, the external outer winding 202 can provide a stronger magnetic field, and the internal inner winding 201 can effectively improve the efficiency. The multiple magnetic steels inside the rotating assembly 301 are arranged at a specific angle to optimize the magnetic field distribution. The position sensing sensor 6 is responsible for detecting the position of the rotating assembly 301 and feeding back to the controller for accurate adjustment of the current phase, achieving smooth start and efficient operation. When the motor receives power input during use, the controller sends instructions according to the position signal fed back by the position sensing sensor 6, so that the corresponding inner and outer windings 201 and 202 of the stator 2 are energized to generate a magnetic field, which in turn drives the rotor 3 to rotate. As the rotor 3 rotates, the position sensing sensor 6 continuously updates the position information, and the controller adjusts the on-off state of each inner and outer winding 201 and 202 accordingly to maintain the optimal operating state of the motor. This can significantly reduce manufacturing costs, making high-end performance small brushless motors more popular, enhancing torque output during low-speed operation, and improving user experience. The coil material used in the stator 2 is copper, which can effectively reduce resistance loss; the rotor 3 is made of neodymium iron boron material, which has high magnetic strength; the position sensing sensor 6 is a Hall effect element with high precision and good stability.

[0033] Among them, by setting the heating plate 5, in use, the heating plate 5 can realize uniform conduction of the heat inside the shell 1, and the set of heat dissipation fins 501 can further improve the efficiency of heat dissipation. By setting the clamping groove 303, in use, the clamping ring 304 can be clamped inside the clamping groove 303 to fix the rotor 3 and prevent it from coming out during operation, improving the stability of the motor operation.

[0034] At the same time, the material of the shell 1 is aluminum alloy, which can further reduce the weight of the motor and effectively improve the efficiency of heat dissipation. The material of the heat dissipation fin 501 is copper, which has good thermal conductivity and helps to dissipate heat from the motor more quickly, improving the stability of the motor operation under high temperature conditions.

[0035] In addition, by setting the mounting block 4, in use, the mounting plate 401 can further improve the convenience of motor installation and facilitate the subsequent addition of more expansion structures to the motor, improving the practicality of the device. By setting the connecting block 403, in use, the fixing effect between the two sets of mounting plates 401 can be better achieved. The installation screw holes 402 can make the installation process more convenient and improve the installation efficiency.

[0036] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application is described in detail with reference to the foregoing embodiments, modifications to the foregoing embodiments or equivalent replacements to some technical features thereof can be made by those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A small brushless motor, comprising a housing (1), characterized in that: A stator (2) and a rotor (3) are provided inside the housing (1). Multiple groups of inner windings (201) and multiple groups of outer windings (202) are provided inside the stator (2). The multiple groups of inner windings (201) are made of thin wires, and the multiple groups of outer windings (202) are made of thick wires. A rotor (3) is provided between the housing (1) and the stator (2). The rotor (3) comprises a rotating assembly (301) and a rotating shaft (302). The rotating assembly (301) is located between the housing (1) and the stator (2). The rotating shaft (302) is rotatably connected to the inside of the housing (1). Bearings (305) are installed at both ends of the rotating shaft (302), and the bearing (305) at one end is installed inside the housing (1). A position sensing sensor (6) is provided inside the stator (2). Multiple permanent magnets are provided inside the rotating assembly (301).

2. A small brushless motor according to claim 1, characterized in that: The inner layer winding (201) and the outer layer winding (202) are both made of copper, the rotating assembly (301) is made of neodymium iron boron, and the position sensing sensor (6) is a Hall effect element.

3. A small brushless motor according to claim 1, characterized in that: A heat spreader (5) is sleeved on the outside of the housing (1), and multiple groups of heat dissipation fins (501) are installed on the outside of the heat spreader (5), with the intervals between the multiple groups of heat dissipation fins (501) being the same.

4. A small brushless motor according to claim 1, characterized in that: A clamping groove (303) is provided at one end of the rotating shaft (302), and a clamping ring (304) is installed inside the clamping groove (303).

5. A small brushless motor according to claim 3, characterized in that: The material of the housing (1) is aluminum alloy, and the material of the heat dissipation fins (501) is copper.

6. A small brushless motor according to claim 1, characterized in that: A mounting block (4) is installed on the outside of the rotating shaft (302), the mounting block (4) is fixedly connected to the outside of one group of the bearings (305), and two groups of mounting plates (401) are installed on the outside of the mounting block (4).

7. A small brushless motor according to claim 6, characterized in that: Multiple groups of connection blocks (403) are provided on the outside of one group of the mounting plates (401), and the multiple groups of connection blocks (403) are mutually abutted against the other group of the mounting plates (401). Multiple groups of mounting threaded holes (402) are provided inside both groups of the mounting plates (401).

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