A multi-faceted, high-volume magnetic levitation DC brushless motor

Abstract

This invention provides a multi-faceted, high-volume magnetic levitation brushless DC motor, belonging to the field of brushless motor technology. It includes a mover assembly, a centrifugal release assembly, a stator assembly, a suspension assembly, end face components, a locking component, and a control circuit board. The mover assembly includes a first mover housing and a second mover housing, both with side air inlets on their end faces. The first mover housing contains alternating permanent magnets with opposite magnetic properties. The centrifugal release assembly is located on the first mover housing and opens by rotating the mover assembly, establishing a heat dissipation channel. The stator assembly is located inside the mover assembly and provides controllable magnetic force. Through the stator assembly, end face components, and mover assembly, multiple side and axial air inlets are provided, with sufficient airflow to remove more heat from the stator assembly, improving heat dissipation efficiency.

Description

Technical Field

[0001] This invention relates to the field of brushless motor technology, specifically to a multi-faceted, high-volume magnetic levitation DC brushless motor. Background Technology

[0002] A brushless DC motor is a type of motor that uses electronic commutation instead of traditional mechanical commutation. Compared with brushed DC motors, brushless motors have higher efficiency, longer lifespan, and lower maintenance costs. Its working principle is to sequentially energize the stator windings through an electronic controller (usually a three-phase inverter), thereby generating a rotating magnetic field that drives the permanent magnets on the rotor to rotate.

[0003] In related technologies, such as the brushless DC motor and brushless DC motor operation method with announcement number CN116780813B, the brushless DC motor includes a housing and four rotor magnets located inside the housing. The four rotor magnets are placed inside the housing with alternating N and S poles, and stator magnets are provided at the center of the four rotor magnets.

[0004] Traditional brushless motors, as mentioned above, typically only allow airflow from one side, resulting in a single airflow direction, which is not conducive to heat dissipation from the internal stator. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multi-faceted, high-volume magnetic levitation DC brushless motor, which solves the problem of a single air intake surface in traditional brushless motors.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-faceted, high-volume magnetic levitation brushless DC motor, comprising: The mover assembly includes a mover housing 1 and a mover housing 2. Both the end faces of the mover housing 1 and the mover housing 2 are provided with side air inlets. Permanent magnets with opposite magnetic properties are alternately arranged inside the mover housing 1. A centrifugal release assembly is located on the outer shell of the moving part. The centrifugal release assembly is opened by rotating the moving part assembly to establish a heat dissipation channel. A stator assembly, located inside the rotor assembly, is used to provide controllable magnetic force; A suspension assembly, which is disposed between the mover assembly and the stator assembly, is used to provide support for the mover assembly by utilizing the repulsive force of opposite magnetic forces; An end face member is provided on the outside of the mover assembly and is used to limit the axial position of the mover assembly; A locking element, which is disposed on the stator core, is used to restrict and lock the end face component; The control circuit board is used to control the current direction in the stator assembly. The stator assembly, end face components, and mover assembly provide multi-faceted lateral and axial air inlets with ample airflow, effectively removing more heat from the stator assembly and improving heat dissipation efficiency. The centrifugal release component utilizes the centrifugal force generated by the rotation of the mover assembly to establish a heat dissipation channel, further ensuring that the heat from the winding coils within the stator assembly is dissipated in a timely manner.

[0007] Preferably, both the first and second moving part housings are provided with raised rings on their circumferential surfaces, and the raised rings are provided with mounting holes.

[0008] Preferably, the stator assembly includes a stator core, a winding core is provided on the circumferential surface of the stator core, a winding coil is provided on the winding core, an airflow channel is provided axially on the stator core, stepped plates are symmetrically fixedly connected in the airflow channel, and an airflow branch is provided in the stator core, the airflow branch connecting the airflow channel and the winding coil to each other.

[0009] Preferably, the circumferential surface of the end face is provided with a radial opening, a ball bearing is provided on one side of the end face near the mover assembly, a sleeve is fixedly connected to the center of the end face, and an axial opening is uniformly provided on the circumference of the end face; the ball bearings on both sides are in contact with the first mover housing and the second mover housing, respectively.

[0010] Preferably, the locking element is a nut, which is threadedly engaged with the rod-shaped component of the stator core.

[0011] Preferably, the control circuit board consists of two semi-rings and integrates a Hall sensor.

[0012] Preferably, the centrifugal release assembly includes an outwardly inclined channel on the first moving part housing, an air inlet notch on the inner wall of the first moving part housing, a retaining ring fixedly connected in the inclined channel, a connecting rod slidably connected in the retaining ring, an end cap fixedly connected to the outer end of the connecting rod, a sealing ring fixedly connected to the side of the end cap near the first moving part housing, a sealing groove provided on the outer surface of the first moving part housing, the sealing ring and the sealing groove being mutually adapted, a baffle plate fixedly connected to the inner end of the connecting rod, a spring sleeved on the connecting rod, the spring being located between the retaining ring and the baffle plate, and a retaining channel provided in the retaining ring.

[0013] Preferably, the suspension assembly includes an outer magnetic ring and an inner magnetic ring. The two outer magnetic rings are fixedly installed on the first and second rotor housings, and the inner magnetic ring is fixedly installed on the stator core. The outer magnetic rings are located outside the inner magnetic rings, and the magnetism of the outer magnetic rings is opposite to that of the inner magnetic rings. The outer side of the inner magnetic ring is provided with an end face ring rail one and an end face ring rail two. The end face ring rail one and the end face ring rail two are respectively fixedly installed on the two end faces of the stator core. The first and second rotor housings slide in cooperation with the end face ring rail one and the end face ring rail two, respectively.

[0014] This invention provides a multi-faceted air intake, high-volume magnetic levitation DC brushless motor. It has the following beneficial effects: 1. The present invention, through the stator assembly, end face parts and mover assembly, can provide lateral and axial multi-face air inlets with sufficient air volume, which can remove more heat from the stator assembly and improve heat dissipation efficiency.

[0015] 2. The present invention, through the centrifugal release component, can establish a heat dissipation channel by the centrifugal force generated by the rotation of the moving part, which can dissipate heat from the winding coil in the stator part, and further ensure that the heat of the winding coil can be dissipated in a timely manner. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall disassembled structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a cross-sectional schematic diagram of the present invention; Figure 5 This is a schematic diagram of the end face component in this invention; Figure 6 This is a schematic diagram of the stator assembly in this invention; Figure 7 This is a schematic diagram of the moving part component in this invention; Figure 8 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the connecting rod portion in this invention; Figure 10 This is a schematic diagram of the angle of the connecting rod in this invention.

[0017] The components include: 1. Mover assembly; 2. Stator assembly; 3. End face component; 4. Locking component; 5. Control circuit board; 101. Mover housing one; 102. Mover housing two; 103. Protruding ring; 104. Side air inlet; 105. Permanent magnet; 201. Stator core; 202. Winding core; 203. Winding coil; 204. Airflow channel; 205. Airflow channel; 206. Stepped plate; 301. Radial opening; 302. Axial opening; 304. Sleeve; 305. Ball bearing; 601. Inclined channel; 602. End; 603. Sealing ring; 604. Retaining ring; 6041. Retaining channel; 605. Spring; 606. Baffle; 607. Air inlet notch; 608. Connecting rod; 701. Outer magnetic ring; 702. Inner magnetic ring; 703. End face ring rail one; 704. End face ring rail two. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-10 As shown, this embodiment of the invention provides a multi-faceted air intake, high-volume magnetic levitation DC brushless motor, comprising: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 The mover assembly 1 includes a first mover housing 101 and a second mover housing 102. Both the first mover housing 101 and the second mover housing 102 have side air inlets 104 on their end faces. The first mover housing 101 has alternating permanent magnets 105 with opposite magnetic properties inside. Both the first mover housing 101 and the second mover housing 102 have protruding rings 103 on their circumferential surfaces, and the protruding rings 103 have mounting holes. The mover assembly 1 is a rotatable component. The mover housing 101 and the mover housing 2 102 are detachable from each other and connected by screws. During assembly, the mover housing 101 and the mover housing 2 102 can be easily installed. During disassembly, the mover housing 101 and the mover housing 2 102 can be removed by unscrewing the corresponding screws. The mover housing 101 is cylindrical and contains multiple permanent magnets 105. Adjacent permanent magnets 105 have opposite magnetic properties, such as the alternating N and S poles of a traditional permanent magnet 105. The protruding ring 103 can be circular as needed and can connect the mover assembly 1 to an external driven component. The mounting holes of the protruding ring 103 are used for bolt and nut installation.

[0020] refer to Figure 2 , Figure 3 , Figure 4 , Figure 8 , Figure 9 , Figure 10 The centrifugal release assembly is located on the rotor housing 101. The centrifugal release assembly is opened by rotating the rotor assembly 1 to establish a heat dissipation channel. The centrifugal release assembly includes an outwardly inclined channel 601 on the rotor housing 101, an air inlet 607 on the inner wall of the rotor housing 101, a retaining ring 604 fixedly connected in the inclined channel 601, a connecting rod 608 slidably connected in the retaining ring 604, an end 602 fixedly connected to the outer end of the connecting rod 608, a sealing ring 603 fixedly connected to the side of the end 602 near the rotor housing 101, a sealing groove provided on the outer surface of the rotor housing 101, the sealing ring 603 and the sealing groove being adapted to each other, a baffle 606 fixedly connected to the inner end of the connecting rod 608, a spring 605 sleeved on the connecting rod 608, the spring 605 being located between the retaining ring 604 and the baffle 606, and a retaining channel 6041 provided in the retaining ring 604. During implementation, the angle range between the central axis of the connecting rod 608 and the vertical plane is: the maximum angle β1 is 80° and the minimum angle β2 is 50°. As the angle range between the central axis of the connecting rod 608 and the vertical plane decreases, the radial component force generated by the centrifugal force in the connecting rod 608 part is greater. The connecting rod 608 part can open the inclined channel 601 smoothly at a lower rotation speed, and conversely, a higher rotation speed is required. Since different weights experience different centrifugal forces at the same rotation speed, the greater the weight, the greater the centrifugal force. Therefore, the end 602 can be made of a material with higher density, such as titanium alloy. During centrifugal release, the rotation of the moving part housing 101 will cause the connecting rod 608 to rotate. Since the inclined channel 601 is inclined outward, the centrifugal force will cause the connecting rod 608, end 602, and baffle 606 to slide outward as a whole, overcoming the elastic force of the spring 605. The air inlet 607 and the inclined channel 601 are connected to the external space, establishing a heat dissipation channel. Therefore, the external airflow can exchange with the air inside the moving part housing 101, thereby increasing the airflow exchange volume and improving the heat dissipation efficiency. Since centrifugal force is positively correlated with the rotational speed of the mover housing 101, the higher the rotational speed of the mover housing 101, the more stable the heat dissipation channel is. When the rotational speed of the mover housing 101 is low or stops, the compressed spring 605 returns to its original state, and the end 602 drives the sealing ring 603. The sealing ring 603 is inserted into the sealing groove, blocking the inclined channel 601, thereby preventing external impurities from entering the mover housing 101 through the inclined channel 601 and ensuring the stable operation of each stator assembly 2.

[0021] refer to Figure 3 , Figure 4 , Figure 6 Stator assembly 2 is located inside rotor assembly 1 and is used to provide controllable magnetic force. Stator assembly 2 includes stator core 201, a winding core 202 is provided on the circumferential surface of stator core 201, a winding coil 203 is provided on the winding core 202, an airflow channel 204 is provided axially on stator core 201, stepped plates 206 are symmetrically fixedly connected in the airflow channel 204, and an airflow branch channel 205 is provided in stator core 201, which connects the airflow channel 204 and the winding coil 203 to each other. The stator core 201 has rod-shaped components on both sides for installation and use; the winding core 202 is used to generate magnetic force when the coil 203 is energized, and the coil 203 is used for current flow; the airflow channel 204 is used for airflow to pass through, which can carry away the heat on the stator core 201; the stepped plate 206 is used to intercept the airflow, so that the airflow can enter the airflow channel 205, and then enter the coil 203 and the control circuit board 5, carrying away the heat of the coil 203 and the control circuit board 5; In other embodiments, the airflow divider 205 and the step plate 206 can be omitted, and the motor in this manner is suitable for working environments with high dust content.

[0022] refer to Figure 3 , Figure 4 , Figure 6 A suspension assembly is located between the mover assembly 1 and the stator assembly 2. It is used to provide support for the mover assembly 1 by utilizing the repulsive force of opposite magnetic properties. The suspension assembly includes an outer magnetic ring 701 and an inner magnetic ring 702. The two outer magnetic rings 701 are fixedly installed on the mover housing 101 and the mover housing 202. The inner magnetic ring 702 is fixedly installed on the stator core 201. The outer magnetic rings 701 are located outside the inner magnetic rings 702. The outer magnetic rings 701 and the inner magnetic rings 702 have opposite magnetic properties. The outer side of the inner magnetic ring 702 is provided with end face ring rail 1 703 and end face ring rail 2 704. The end face ring rail 1 703 and the end face ring rail 2 704 are respectively fixedly installed on the two end faces of the stator core 201. The mover housing 1 101 and the mover housing 2 102 are slidably engaged with the end face ring rail 1 703 and the end face ring rail 2 704, respectively. During levitation operation, the magnetic repulsion between the outer magnetic ring 701 and the inner magnetic ring 702 provides support for the first and second moving part housings 101 and 102. The outer magnetic ring 701 and the inner magnetic ring 702 do not contact each other, so there is no friction between them and no friction loss. In the axial direction, the first and second moving part housings 101 and 102 slide against the first and second end face ring rails 703 and 704, respectively. The first and second end face ring rails 703 and 704 can be made of materials with low coefficient of friction, so the friction angle is small and the friction loss is small.

[0023] refer to Figure 2 , Figure 3 , Figure 5 End face 3 is located on the outside of the mover assembly 1 and is used to limit the axial position of the mover assembly 1. The circumferential surface of the end face 3 is provided with a radial opening 301. A ball bearing 305 is provided on the side of the end face 3 near the mover assembly 1. A sleeve 304 is fixedly connected at the center of the end face 3. Axial openings 302 are uniformly provided on the circumference of the end face 3. The two balls bearing 305 on both sides are in contact with the first mover housing 101 and the second mover housing 102, respectively. When the end face component 3 is installed, the sleeve 304 is fitted onto the rod-shaped component of the stator core 201. The airflow flowing in from the side air inlet 104 can flow into the radial port 301, and the axial port 302 can also be used for airflow. The airflow direction is diverse. This part of the airflow can dissipate heat from the end face ring rail 1 703 and end face ring rail 2 704, ensuring that the end face ring rail 1 703 and end face ring rail 2 704 work normally. The ball bearings 305 on both sides are used to limit the mover housing 1 101 and mover housing 2 102, ensuring the axial stability of the mover housing 1 101 and mover housing 2 102.

[0024] refer to Figure 2 , Figure 3 Locking element 4 is provided on the stator core 201 and is used to restrict and lock the end face 3; the locking element 4 is a nut, which is threadedly engaged with the rod-shaped component of the stator core 201; refer to Figure 3 , Figure 4 Control circuit board 5 is used to control the current direction in stator assembly 2; control circuit board 5 consists of two semi-rings and integrates Hall sensors. The Hall sensor senses changes in the magnetic field and outputs digital signals in real time. These signals, in conjunction with the control circuit, control the current direction of the winding coils 203 in each part of the stator assembly 2. Both the control circuit and the Hall sensor are existing technologies and will not be described in detail here.

[0025] Working principle: Under the action of the control circuit board 5, the winding coil 203 is energized, and the winding core 202 generates magnetic force in sequence. Utilizing the principle of like poles repelling and unlike poles attracting, the permanent magnet 105 is attracted and repelled, thereby driving the first moving housing 101 and the second moving housing 102 to rotate. The magnetic repulsion between the outer magnetic ring 701 and the inner magnetic ring 702 can provide support for the first moving housing 101 and the second moving housing 102. The first moving housing 101 and the second moving housing 102 slide on the first end face ring rail 703 and the second end face ring rail 704 respectively, thereby ensuring the stable rotation of the first moving housing 101 and the second moving housing 102. As the moving housing 101 rotates, it will cause the connecting rod 608 to rotate. Since the inclined channel 601 is inclined outward, the centrifugal force will cause the connecting rod 608, the end 602, and the baffle 606 to slide outward as a whole, overcoming the elastic force of the spring 605. The air inlet 607 and the inclined channel 601 are connected to the external space, establishing a heat dissipation channel. Therefore, the external airflow can exchange with the air inside the moving housing 101, thereby increasing the airflow exchange volume and improving the heat dissipation efficiency. The side air inlet 104, radial inlet 301, and axial inlet 302 can all allow airflow to enter, and the airflow can enter from multiple directions. The large air volume can carry a lot of heat. Combined with the low friction of magnetic levitation, it can ensure the stability and durability of the rotation of the moving part assembly 1.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-faceted air intake, high-volume magnetic levitation DC brushless motor, characterized in that, include: The moving part assembly (1) includes a moving part housing one (101) and a moving part housing two (102). The end faces of the moving part housing one (101) and the moving part housing two (102) are provided with side air inlets (104). Permanent magnets (105) with opposite magnetic properties are alternately arranged inside the moving part housing one (101). Centrifugal release assembly, which is located on the moving part housing (101), and the centrifugal release assembly is opened by rotating the moving part assembly (1) to establish a heat dissipation channel; Stator assembly (2), which is located inside the mover assembly (1), is used to provide controllable magnetic force; A suspension component is disposed between the mover component (1) and the stator component (2) and is used to provide support for the mover component (1) by using the repulsive force of opposite magnetic forces; End face member (3), the end face member (3) is disposed on the outside of the moving part assembly (1) and is used to limit the axial position of the moving part assembly (1); Locking member (4), which is provided on the stator core (201) and is used to restrict and lock the end face member (3). The control circuit board (5) is used to control the direction of current in the stator assembly (2).

2. The multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 1, characterized in that: Both the first moving part housing (101) and the second moving part housing (102) are provided with raised rings (103) on their circumferential surfaces, and the raised rings (103) are provided with mounting holes.

3. The multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 1, characterized in that: The stator assembly (2) includes a stator core (201), a winding core (202) is provided on the circumferential surface of the stator core (201), a winding coil (203) is provided on the winding core (202), an airflow channel (204) is provided axially on the stator core (201), a stepped piece (206) is symmetrically fixedly connected in the airflow channel (204), and an airflow branch channel (205) is provided in the stator core (201), which connects the airflow channel (204) and the winding coil (203) to each other.

4. The multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 1, characterized in that: The end face (3) has a radial opening (301) on its circumferential surface. The end face (3) has a ball (305) on one side near the mover assembly (1). A sleeve (304) is fixedly connected to the center of the end face (3). The end face (3) has an axial opening (302) evenly distributed around its circumference. The ball (305) on both sides is in contact with the first mover housing (101) and the second mover housing (102) respectively.

5. A multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 3, characterized in that: The locking element (4) is a nut, which is threadedly engaged with the rod-shaped component of the stator core (201).

6. The multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 1, characterized in that: The control circuit board (5) consists of two semi-rings and integrates a Hall sensor.

7. A multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 1, characterized in that: The centrifugal release assembly includes an outwardly inclined channel (601) on the first moving part housing (101), an air inlet (607) on the inner wall of the first moving part housing (101), a retaining ring (604) fixedly connected inside the inclined channel (601), a connecting rod (608) slidably connected inside the retaining ring (604), and an end (602) fixedly connected to the outer end of the connecting rod (608), the end (602) being close to the first moving part housing (101). A sealing ring (603) is fixedly connected to one side. A sealing groove is provided on the outer surface of the moving part housing (101). The sealing ring (603) and the sealing groove are adapted to each other. A baffle (606) is fixedly connected to the inner end of the connecting rod (608). A spring (605) is sleeved on the connecting rod (608). The spring (605) is located between the retaining ring (604) and the baffle (606). A retaining channel (6041) is provided in the retaining ring (604).

8. A multi-faceted air intake high-volume magnetic levitation DC brushless motor according to claim 3, characterized in that: The suspension assembly includes an outer magnetic ring (701) and an inner magnetic ring (702). The two outer magnetic rings (701) are fixedly installed on the first mover housing (101) and the second mover housing (102). The inner magnetic ring (702) is fixedly installed on the stator core (201). The outer magnetic ring (701) is located outside the inner magnetic ring (702). The outer magnetic ring (701) and the inner magnetic ring (702) have opposite magnetic properties. The outer side of the inner magnetic ring (702) is provided with an end face ring rail one (703) and an end face ring rail two (704). The end face ring rail one (703) and the end face ring rail two (704) are fixedly installed on the two end faces of the stator core (201). The first mover housing (101) and the second mover housing (102) are slidably engaged with the end face ring rail one (703) and the end face ring rail two (704).

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