High-efficiency energy-saving direct-current brushless motor

Abstract

The application relates to the technical field of brushless motors, and discloses a high-efficiency energy-saving direct-current brushless motor which comprises a driving shaft, the outer wall of the driving shaft is fixedly connected with a hollow column one, the inner wall of the hollow column one is fixedly connected with a magnet, the end, away from the driving shaft, of the hollow column one is fixedly connected with a connecting ring one, and the high-efficiency energy-saving direct-current brushless motor further comprises a stator mechanism which comprises a connecting ring three rotatably connected to the inner wall of the connecting ring one through a bearing, and the end, away from the connecting ring one, of the connecting ring three is fixedly connected with a bottom plate. Through the arrangement of the stator mechanism, when the motor is reversed, the airflow direction is automatically switched along with the reversal of the fan blades; at this time, the conical net effectively prevents dust from invading from the back; and the self-cleaning function is realized by using the reverse airflow. The structure ensures the long-term smoothness of the ventilation system, makes the motor still have excellent thermal management performance under complex working conditions, and improves the environmental adaptability and operation reliability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of brushless motor technology, specifically to a high-efficiency and energy-saving DC brushless motor. Background Technology

[0002] A brushless DC motor consists of a motor body and a driver, and is a typical mechatronic product. Because a brushless DC motor operates in a self-controlled manner, it does not require an additional starting winding on the rotor like a synchronous motor that starts under heavy load with frequency conversion speed regulation, nor does it experience oscillation or loss of synchronism during sudden load changes.

[0003] Patent application CN201720754129.0 discloses a high-efficiency and energy-saving brushless DC motor, comprising an inner stator core fixedly disposed within an outer rotor core, an excitation winding wound around the inner stator core, an inner rotor rotatably disposed within the inner stator core, and a housing sleeved outside the outer rotor core. A permanent magnet is fixedly disposed on the inner rotor, and a drive circuit is disposed at one end of the outer rotor core, the drive circuit providing drive current to the excitation winding. It has advantages such as long lifespan, high controllability, high efficiency, adjustability, low energy consumption, and low noise, and can be widely used in various fields.

[0004] In existing brushless motors, due to the lack of a heat dissipation mechanism, the internal temperature of the motor tends to rise cumulatively under continuous high load conditions. With the long-term effect of thermal stress, the operating temperature of the permanent magnet is prone to exceed its critical threshold, causing irreversible demagnetization of the permanent magnet, which in turn causes the overall performance of the motor to degrade or even fail, resulting in a decrease in the lifespan of the motor and is not conducive to the long-term use of the equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-efficiency and energy-saving brushless DC motor to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency and energy-saving brushless DC motor, comprising a drive shaft, a hollow column fixedly connected to the outer wall of the drive shaft, a magnet fixedly connected to the inner wall of the hollow column, and a connecting ring fixedly connected to the end of the hollow column away from the drive shaft, and further comprising: The stator mechanism includes a connecting ring three rotatably connected to the inner wall of a connecting ring one via bearings. A base plate is fixedly connected to the end of the connecting ring three away from the connecting ring one. A housing is fixedly connected to the side of the base plate away from the connecting ring three. A hollow column four is fixedly connected to the outer wall of the base plate. A notch two is opened on the outer wall of the hollow column four. After the coil is energized, the magnet and the hollow column one are rotated by controlling the coil current. By setting up the stator mechanism, when the motor reverses, the airflow direction will automatically switch as the fan blades reverse. At this time, the conical mesh effectively blocks the intrusion of dust from the rear and also realizes the self-cleaning function by using the reverse airflow. This structure ensures the long-term smooth flow of the ventilation system, enabling the motor to maintain excellent thermal management performance under complex working conditions, and improving the environmental adaptability and operational reliability of the equipment.

[0007] According to the above technical solution, a fan blade is fixedly connected to the outer wall of the hollow column one, and a hollow column three is fixedly connected to the end of the fan blade away from the hollow column one. The outer wall of the hollow column three is rotatably connected to the hollow column four through a bearing. The rotation of the fan blade drives the flow of gas inside the equipment. As the motor works, the fan blade, which is set between the hollow column three and the hollow column one, will also rotate synchronously, guiding the external cooling airflow through the motor cavity along a preset path to quickly cool the coil and magnet. Compared with passive heat dissipation, active heat dissipation can keep the temperature of the core components within a safe threshold, which not only effectively extends the continuous operation time of the equipment, but also reduces the magnetic flux attenuation caused by temperature rise.

[0008] According to the above technical solution, a lifting plate is fixedly connected to the outer wall of the hollow column 1. A ventilation hole 1 is opened on the outer wall of the lifting plate, and a notch 1 is opened on the outer wall of the hollow column 1. The lifting plate and the ventilation hole 1 divert the gas inside the hollow column 3, which serves to direct the flow of the hollow gas. By setting the lifting plate and the ventilation hole 1, the space inside the hollow column 1 can be divided into two parts. During the air intake stage, most of the dust is intercepted by the ventilation hole 1. At the same time, the diversion design makes part of the airflow form a self-cleaning air curtain, which continuously blows away the dust accumulated on the surface of the ventilation hole 1. This not only keeps the core components clean, but also avoids the accumulation of dust on the lifting plate, effectively controls the motor operating temperature, and enables the equipment to maintain long-term stable operation.

[0009] According to the above technical solution, a hollow column two is fixedly connected to the end of the lifting plate away from the hollow column one. A connecting ring two is fixedly connected to the inner wall of the hollow column two. The inner wall of the connecting ring two is fixedly connected to the hollow column one. The outer wall of the hollow column two is fixedly connected to the hollow column three. With the cooperation of the lifting plate, the hollow column two and the connecting ring two allow the gas in the hollow column three to be divided into two parts.

[0010] According to the above technical solution, a ventilation hole 2 is provided at the end of the hollow column 2 away from the lifting plate. The ventilation hole 2 penetrates the hollow column 2 and extends to the lifting plate. The ventilation hole 2 allows the gas in the hollow column 3 to circulate with the outside gas. By setting the hollow column 2, the airflow inside the equipment is divided into two parts by the lifting plate. The other part of the airflow will be discharged through the ventilation hole 2 on the hollow column 2. Since the ventilation hole 2 is located on the periphery of the entire equipment, some heat generated by passive heat dissipation will accumulate near the hollow column 2. The fast-flowing airflow can quickly carry away the temperature on the hollow column 2, further enhancing the heat dissipation function of the equipment, effectively extending the continuous operation time of the equipment, and reducing the magnetic flux attenuation phenomenon caused by temperature rise.

[0011] According to the above technical solution, a ventilation opening is provided on the side of the base plate near the coil, and a ventilation groove is provided on the inner wall of the ventilation opening. The ventilation groove penetrates the base plate and extends into the interior of the outer shell. The ventilation opening and the ventilation groove allow the gas inside the hollow column to exchange with the gas in the outer shell.

[0012] According to the above technical solution, a conical mesh is fixedly connected to the inner wall of the outer shell, and the inner wall of the conical mesh is fixedly connected to the outer shell. The conical mesh is used to filter impurities in the gas.

[0013] According to the above technical solution, the outer wall of the outer shell is provided with a second ventilation opening and a third ventilation opening. The inner wall of the outer shell is fixedly connected with an annular plate, the end of which is far from the outer shell is arc-shaped, which can play a role in the direction of gas flow inside the working outer shell.

[0014] Compared with the prior art, the present invention provides a high-efficiency and energy-saving brushless DC motor, which has the following beneficial effects: 1. This invention uses fan blades positioned between hollow column three and hollow column one. As the motor operates, the fan blades rotate synchronously, guiding external cooling airflow through the motor cavity along a preset path to rapidly cool the coils and magnets. Compared to passive heat dissipation, active heat dissipation keeps the temperature of core components within a safe threshold, effectively extending the continuous operating time of the equipment and reducing the magnetic flux attenuation caused by temperature rise.

[0015] 2. By setting up a lifting plate and a ventilation hole, the space inside the hollow column can be divided into two parts. During the air intake stage, most of the dust is intercepted through the ventilation hole. At the same time, the diversion design allows part of the airflow to form a self-cleaning air curtain, which continuously blows away the dust accumulated on the surface of the ventilation hole. This not only keeps the core components clean, but also prevents dust from accumulating on the lifting plate, effectively controls the motor operating temperature, and enables the equipment to maintain long-term stable operation.

[0016] 3. By setting up a hollow column two, the airflow inside the equipment is divided into two parts by the lifting plate. The other part of the airflow will be discharged through the ventilation hole two on the hollow column two. Since the ventilation hole two is located on the periphery of the entire equipment, some heat generated by passive heat dissipation will accumulate near the hollow column two. The fast-flowing airflow can quickly carry away the temperature on the hollow column two, further heating the heat dissipation function of the equipment, effectively extending the continuous operation time of the equipment, and also reducing the magnetic flux attenuation phenomenon caused by temperature rise.

[0017] 4. By setting up a stator mechanism, the airflow direction will automatically switch when the motor reverses and the fan blades reverse. At this time, the conical mesh effectively blocks dust from entering from the rear and also realizes self-cleaning function by using reverse airflow. This structure ensures the long-term smooth operation of the ventilation system, enables the motor to maintain excellent thermal management performance under complex working conditions, and improves the environmental adaptability and operational reliability of the equipment. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the internal structure of the present invention; Figure 4 This is an exploded view of the internal structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the present invention; Figure 6 This is a schematic diagram of the stator mechanism of the present invention; Figure 7 A cross-sectional view of the stator mechanism of the present invention. Figure 1 ; Figure 8 A cross-sectional view of the stator mechanism of the present invention. Figure 2 ; Figure 9 For the present invention Figure 8 A magnified view of A in the middle.

[0019] In the diagram: 1. Drive shaft; 101. Hollow column one; 102. Magnet; 103. Notch one; 104. Lifting plate; 105. Ventilation hole one; 106. Connecting ring one; 107. Fan blade; 108. Hollow column two; 109. Hollow column three; 1010. Connecting ring two; 1011. Ventilation hole two; 2. Stator mechanism; 201. Hollow column four; 202. Base plate; 203. Coil; 204. Connecting ring three; 205. Notch two; 206. Ventilation port one; 207. Ventilation slot; 208. Ventilation port two; 209. Ventilation port three; 2010. Annular plate; 2011. Conical mesh; 2012. Outer shell. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Example 1: See Figures 1-5This invention provides a technical solution: a high-efficiency and energy-saving brushless DC motor, including a drive shaft 1, a hollow column 101 fixedly connected to the outer wall of the drive shaft 1, a magnet 102 fixedly connected to the inner wall of the hollow column 101, a connecting ring 106 fixedly connected to the end of the hollow column 101 away from the drive shaft 1, a fan blade 107 fixedly connected to the outer wall of the hollow column 101, a hollow column 109 fixedly connected to the end of the fan blade 107 away from the hollow column 101, and the outer wall of the hollow column 109 rotatably connected to the hollow column 201 via a bearing. When the fan blade 107 reverses direction, the rotating fan blade 107 draws in external air through the ventilation hole 1011, and the drawn-in airflow carries away the hollow column 1011. The heat from column 2 108 passes through fan blade 107 and is finally discharged into the high-temperature gas through notch 205. A lifting plate 104 is fixedly connected to the outer wall of hollow column 1 101. Ventilation holes 105 and notches 103 are provided on the outer wall of hollow column 1 101. The lifting plate 104 and ventilation holes 105 divert the gas flow inside hollow column 3 109, thus guiding the airflow. A hollow column 2 108 is fixedly connected to the end of the lifting plate 104 away from hollow column 1 101. A connecting ring 1010 is fixedly connected to the inner wall of hollow column 2 108. The inner wall of the connecting ring 1010 is fixedly connected to hollow column 1 101. The outer wall of 108 is fixedly connected to the hollow column 109. With the cooperation of the lifting plate 104, the hollow column 108 and connecting ring 1010 divide the gas inside the hollow column 109 into two parts. A ventilation hole 1011 is provided at the end of the hollow column 108 away from the lifting plate 104. The ventilation hole 1011 penetrates the hollow column 108 and extends to the lifting plate 104. When the motor is working, with the entry of current, the coil 203 drives the magnet 102 to move. The moving magnet 102 drives the hollow column 101 to rotate. The rotating hollow column 101 drives the fan blade 107 to rotate, and then the rotation of the fan blade 107 draws external gas into the hollow column 109. Between 109 and hollow column 101, when the airflow moves to the area of ​​lifting plate 104, part of the airflow is accelerated by the compression of lifting plate 104 and passes through the outside of lifting plate 104, while the other part of the airflow passes through ventilation hole 105 and passes through the inside of lifting plate 104. When the airflow passing through the inside of lifting plate 104 passes through ventilation hole 105, it will isolate the dust mixed in the airflow outside ventilation hole 105, and the airflow will enter the interior of the motor through notch 103. The airflow passing through the outside of lifting plate 104 is accelerated by the compression of lifting plate 104, and carries away the dust accumulated on ventilation hole 105, and carries away the heat on hollow column 108 through high-speed airflow.

[0024] Example 2: Please refer to Figures 6-9Based on Embodiment 1, the present invention provides a technical solution: a stator mechanism 2, comprising a connecting ring 3 204 rotatably connected to the inner wall of connecting ring 1 106 via bearings, a base plate 202 fixedly connected to one end of connecting ring 3 204 away from connecting ring 1 106, a housing 2012 fixedly connected to one side of base plate 202 away from connecting ring 3 204, and a hollow column 4 201 fixedly connected to the outer wall of base plate 202, the outer wall of hollow column 4 201 having a notch 205. After coil 203 is energized, the magnet 102 and the hollow column 201 are driven by controlling the current of coil 203. As column 101 rotates, a vent 206 is provided on the side of the base plate 202 near coil 203. A ventilation groove 207 is provided on the inner wall of vent 206, penetrating the base plate 202 and extending into the interior of the outer casing 2012. Ventilation vent 206 and ventilation groove 207 allow gas exchange between the hollow column 201 and the outer casing 2012. As the equipment operates, the airflow entering the vicinity of coil 203 is sent into the outer casing through vent 206 and ventilation groove 207. The airflow in the outer casing then passes through vent 208 to expel the high-temperature gas. The gas is discharged from the motor. A conical mesh 2011 is fixedly connected to the inner wall of the outer casing 2012. The inner wall of the conical mesh 2011 is fixedly connected to the outer casing 2012. The conical mesh 2011 is used to filter impurities in the gas. Ventilation openings 208 and 209 are provided on the outer wall of the outer casing 2012. An annular plate 2010 is fixedly connected to the inner wall of the outer casing 2012. The end of the annular plate 2010 away from the outer casing 2012 is arc-shaped, which can play a role in the direction of gas flow inside the working outer casing 2012. When the motor reverses, because... When the fan blade 107 reverses, gas enters the housing through the second vent 208. Part of the gas in the housing is filtered through the conical mesh 2011, while the other part passes through the surface of the conical mesh 2011, carrying away the dust on the surface. The dust is then discharged through the annular plate 2010 and the third vent 209. The gas that enters the equipment is discharged through the gap 103 between the coil 203 and the magnet 102. The gas discharged from the gap 103 passes through the ventilation hole 105, and the high-temperature gas is discharged through the second vent 205 under the rotation of the fan blade 107.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-efficiency and energy-saving brushless DC motor, comprising a drive shaft (1), wherein a hollow column (101) is fixedly connected to the outer wall of the drive shaft (1), a magnet (102) is fixedly connected to the inner wall of the hollow column (101), and a connecting ring (106) is fixedly connected to the end of the hollow column (101) away from the drive shaft (1), characterized in that, Also includes: The stator mechanism (2) includes a connecting ring three (204) rotatably connected to the inner wall of the connecting ring one (106) via a bearing. A base plate (202) is fixedly connected to one end of the connecting ring three (204) away from the connecting ring one (106). A shell (2012) is fixedly connected to one side of the base plate (202) away from the connecting ring three (204). A hollow column four (201) is fixedly connected to the outer wall of the base plate (202). A notch two (205) is opened on the outer wall of the hollow column four (201). After the coil (203) is energized, the magnet (102) and the hollow column one (101) are rotated by controlling the current of the coil (203). A fan blade (107) is fixedly connected to the outer wall of the hollow column one (101). A hollow column three (109) is fixedly connected to the end of the fan blade (107) away from the hollow column one (101). The outer wall of the hollow column three (109) is rotatably connected to the hollow column four (201) through a bearing. The rotation of the fan blade (107) drives the flow of gas inside the equipment. The base plate (202) has a ventilation opening (206) on the side near the coil (203). The inner wall of the ventilation opening (206) has a ventilation groove (207). The ventilation groove (207) penetrates the base plate (202) and extends into the interior of the outer shell (2012). The ventilation opening (206) and the ventilation groove (207) allow the gas inside the hollow column (201) to exchange with the gas in the outer shell (2012). A conical mesh (2011) is fixedly connected to the inner wall of the outer shell (2012). The inner wall of the conical mesh (2011) is fixedly connected to the outer shell (2012). The conical mesh (2011) is used to filter impurities in the gas. The outer wall of the outer shell (2012) is provided with a second ventilation opening (208) and a third ventilation opening (209). An annular plate (2010) is fixedly connected to the inner wall of the outer shell (2012). The end of the annular plate (2010) away from the outer shell (2012) is arc-shaped, which can guide the flow direction of gas inside the working outer shell (2012).

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