A tangential flux brushless motor

Abstract

The utility model discloses a tangential magnetic flux brushless motor, including the casing 1, the inner wall centripetally fixedly connected with stator core 2 in casing 1, the radial of stator core 2 centripetally even array has a plurality of copper wire winding 2.1, and a plurality of copper wire winding 2.1 forms corresponding radial magnetic field, and the center of casing 1 is rotationally connected with rotor core 3, and the circumferential of rotor core 3 even array has a plurality of permanent magnet 3.1, and the magnetic field of a plurality of permanent magnet 3.1 is along tangential distribution, and the number of copper wire winding 2.1 is different with the number of permanent magnet 3.1, and the axis of rotor core 3 is fixedly connected with a rotating output shaft 4, and the output end of rotating output shaft 4 is fixedly connected with eccentric cam 5 for driving. The utility model provides a kind of in stable driving process, and a kind of tangential magnetic flux brushless motor with little wear and tear, long life.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically a tangential flux brushless motor. Background Technology

[0002] Most existing air suspension systems are driven by brushed motors. Although brushed motors are responsive and have low vibration at startup, they generate significant friction during stable operation, leading to substantial energy loss, poor driving performance, and unpleasant noise, vibration, and acoustic roughness, resulting in a poor user experience. Furthermore, brushed motors generate electrical sparks due to continuous contact and friction, causing radio interference. The brushes also wear down and require regular replacement, resulting in a short service life. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a tangential flux brushless motor with stable driving process, low wear and long life.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a tangential flux brushless motor, including a housing, a stator core is fixedly connected to the inner wall of the housing in the circumferential direction, a plurality of copper wire windings are uniformly arranged in the radial direction of the stator core, the plurality of copper wire windings form a corresponding radial magnetic field, a rotor core is rotatably connected to the center of the housing, a plurality of permanent magnets are uniformly arranged in the circumferential direction of the rotor core, the magnetic field of the plurality of permanent magnets is distributed tangentially, the number of copper wire windings is different from the number of permanent magnets, a rotating output shaft is fixedly connected to the axis of the rotor core, and an eccentric cam for driving is fixedly connected to the output end of the rotating output shaft.

[0005] Compared with the prior art, the advantages of this utility model are as follows: by using the difference in the number of copper wire windings and permanent magnets, as well as the magnetic transformation of the copper wire windings, an attraction transformation is formed on the permanent magnets, thereby achieving the rotational driving effect on the rotor core. Each permanent magnet forms a closed magnetic field on the rotor core. When the closed magnetic field of the permanent magnet coincides with the magnetic field lines of the closed magnetic field of the stator core, the attraction of the stator core to this magnetic mechanism is the greatest. Due to the design of the difference in the number of magnets, the attraction force on the rotor core cannot be balanced, thus causing the rotor core to rotate. When the rotor core is subjected to the changing magnetic field of the copper wire windings, a relatively gentle circumferential force can be formed, thereby meeting the requirements of weak magnetic field to achieve high speed performance, and thus achieving the purpose of high-performance drive.

[0006] As an improvement of this utility model, the outer edge of the rotor core is provided with several concave grooves. Through this improvement, an uneven air gap is formed between the rotor core and the stator core, which can make the magnetic field of the rotor core sinusoidal, thereby reducing the output torque and torque pulsation of the rotating output shaft.

[0007] As an improvement of this utility model, the rotor core includes a rotor connector, and a rotating output shaft is fixedly connected to the axis of the rotor connector by an interference fit. Rotor segments are evenly arrayed on the outer edge of the rotor connector, and the permanent magnet is fixedly connected between two adjacent rotor segments.

[0008] As an improvement of this utility model, the rotor petal block is provided with positioning grooves on both sides for positioning permanent magnets, thereby achieving accurate installation of permanent magnets.

[0009] As an improvement of this utility model, the concave groove is also provided between two adjacent rotor segments. The concave groove is provided on the radial side of the permanent magnet away from the axis between the adjacent rotor segments in the same group. Through this improvement, the concave groove is formed by assembling the rotor segments and the permanent magnet, thereby reducing the processing of the concave groove.

[0010] As an improvement of this utility model, a magnetic isolation groove is provided between two adjacent rotor segments. The magnetic isolation groove is located on the radial side of the permanent magnet near the axis between the adjacent rotor segments in the same group. Through this improvement, the design of the magnetic isolation groove can reduce the inter-pole leakage of the permanent magnet, increase the magnetic flux amplitude of the magnetic field, and improve the motor performance.

[0011] As an improvement of this utility model, the rotor lobe is formed by stacking multiple rotor laminations. A connecting post is provided in the circumferential direction of the rotor connector. A cylinder with a diameter larger than the connecting post is provided at the end of the connecting post away from the axis. Multiple rotor laminations are stacked along the connecting post and the cylinder. Through this improvement, the rotor lobe is formed by stacking multiple rotor laminations, which can increase the resistance of the rotor lobe and reduce the eddy current in the rotor core. The connection between the connecting post and the cylinder can ensure the accuracy of the rotor lamination installation and stacking and can prevent the rotor laminations from detaching.

[0012] As an improvement of this utility model, the rotor core is provided with fixed clamping plates at both ends along the axial direction. The two fixed clamping plates are fixedly connected by multiple fixed pins. The multiple fixed pins are evenly arranged in a circumferential array, and each fixed pin passes through the rotor segment from the middle of the rotor segment. Through this improvement, the rotor laminations are clamped and fixed to ensure the structural stability and firmness of the rotor core.

[0013] As an improvement of this utility model, the end of the rotating output shaft away from the eccentric cam is rotatably connected to the inside of the housing via a fixed bearing. A plastic end cap is fixedly connected to the opening end of the housing. Both the stator core and the rotor core are fixed inside the housing via the plastic end cap. A directional bearing is provided on the side of the plastic end cap away from the stator core. The directional bearing is used to rotatably connect the plastic end cap to the other end of the rotating output shaft. Through this improvement, the design of the fixed bearing and the directional bearing ensures the rotatable connection between the two ends of the rotating output shaft, thereby ensuring the rotational stability of the rotating output shaft. The design of the plastic end cap achieves the sealing of the inside of the housing, thereby protecting and dustproofing the stator core and the rotor core.

[0014] As an improvement of this utility model, a three-phase connector is provided on the side of the plastic end cap away from the stator core. The connection parts of the three-phase connector are distributed in a triangular shape, and the connection parts are in a straight line or a square shape. Through this improvement, the design of the three-phase connector facilitates the electrical connection with the copper wire winding, and at the same time reduces the assembly difficulty of the product. The electrical connection between the brushless motor and the power supply can be realized through automatic plugging, which is conducive to realizing automated production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a top view of the internal structure of the casing of this utility model (without the fixing plate).

[0017] Figure 3 This is an enlarged structural schematic diagram of the concave groove of this utility model.

[0018] Figure 4 This is a utility model Figure 2 Schematic diagram of the AA section structure.

[0019] Figure 5 This is a schematic diagram of a magnetic field line distribution structure formed by the copper wire winding of this utility model.

[0020] Figure 6 This is a schematic diagram of another magnetic field line distribution structure formed by the copper wire winding of this utility model.

[0021] The diagram shows: 1. Housing; 1.1. Bearing slot; 2. Stator core; 2.1. Copper wire winding; 3. Rotor core; 3.1. Permanent magnet; 3.2. Concave slot; 3.3. Rotor connector; 3.3.1. Connecting column; 3.3.2. Cylindrical component; 3.4. Rotor segment; 3.4.1. Positioning slot; 3.4.2. Rotor lamination; 3.5. Magnetic isolation slot; 3.6. Fixing clamp; 3.7. Fixing pin; 4. Rotating output shaft; 5. Eccentric cam; 6. Fixed bearing; 7. Plastic end cap; 7.1. Three-phase connector; 8. Directional bearing. Detailed Implementation

[0022] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, a tangential flux brushless motor includes a housing 1. A stator core 2 is fixedly connected to the inner wall of the housing 1 in the circumferential direction. Multiple copper wire windings 2.1 are uniformly arranged in the radial direction of the stator core 2, and the multiple copper wire windings 2.1 form a corresponding radial magnetic field. A rotor core 3 is rotatably connected to the center of the housing 1. Multiple permanent magnets 3.1 are uniformly arranged in the circumferential direction of the rotor core 3, and the magnetic field of the multiple permanent magnets 3.1 is distributed tangentially. The number of copper wire windings 2.1 is different from the number of permanent magnets 3.1. A rotating output shaft 4 is fixedly connected to the axis of the rotor core 3, and an eccentric cam 5 for driving is fixedly connected to the output end of the rotating output shaft 4.

[0024] like Figure 2-3 As shown, the outer edge of the rotor core 3 is provided with several concave grooves 3.2. The rotor core 3 includes a rotor connector 3.3. The rotor connector 3.3 is fixedly connected to the rotating output shaft 4 on its axis by an interference fit. The outer edge of the rotor connector 3.3 is uniformly arrayed with rotor segments 3.4 in the circumferential direction. The permanent magnet 3.1 is fixedly connected between two adjacent rotor segments 3.4. The rotor segments 3.4 are provided with positioning grooves 3.4.1 on both sides for positioning the permanent magnet 3.1. The concave grooves 3.2 are also provided between two adjacent rotor segments 3.4. The concave grooves 3.2 are provided on the radial direction away from the axis of the permanent magnet 3.1 between the same group of adjacent rotor segments 3.4.

[0025] like Figure 2-4 As shown, a magnetic isolation groove 3.5 is provided between two adjacent rotor petal blocks 3.4. The magnetic isolation groove 3.5 is located on the radial side of the permanent magnet 3.1 near the axis between the adjacent rotor petal blocks 3.4 in the same group.

[0026] like Figure 3-4As shown, the rotor lobe 3.4 is formed by stacking multiple rotor laminations 3.4.2. The rotor connector 3.3 has a connecting post 3.3.1 on its circumference. The end of the connecting post 3.3.1 away from the axis has a cylinder 3.3.2 with a diameter larger than the connecting post 3.3.1. The multiple rotor laminations 3.4.2 are stacked along the connecting post 3.3.1 and the cylinder 3.3.2. The rotor core 3 has fixing plates 3.6 at both ends along the axial direction. The two fixing plates 3.6 are fixedly connected by multiple fixing pins 3.7. The multiple fixing pins 3.7 are evenly arrayed along the circumference, and each fixing pin 3.7 passes through the middle of the rotor lobe 3.4.

[0027] like Figure 1 , Figure 4 As shown, the end of the rotating output shaft 4 away from the eccentric cam 5 is rotatably connected to the inside of the housing 1 via a fixed bearing 6. A bearing groove 1.1 for installing the fixed bearing 6 is provided at the bottom of the housing 1. A plastic end cap 7 is fixedly connected to the opening end of the housing 1. The stator core 2 and the rotor core 3 are both fixed inside the housing 1 via the plastic end cap 7. A directional bearing 8 is provided on the side of the plastic end cap 7 away from the stator core 2. The directional bearing 8 is used to rotatably connect the plastic end cap 7 to the other end of the rotating output shaft 4. A three-phase connector 7.1 is also provided on the side of the plastic end cap 7 away from the stator core 2. The connecting parts of the three-phase connector 7.1 are arranged in a triangular pattern. The connecting parts are plugs or sockets. The plugs are in the shape of a straight line or a cylindrical shape. The sockets are in the shape of a straight line, a round opening, or a square opening. The shape of the plug and the socket can be designed according to the connection requirements.

[0028] like Figure 5 , Figure 6As shown, through the design of the tangential flux brushless motor, compared with the brushed motor, there is no friction during stable driving, which will not cause significant energy loss. This makes the brushless motor have stronger driving performance, better performance in terms of noise, vibration, and acoustic roughness, better user experience, and longer service life. Each permanent magnet 3.1 forms an independent magnetic field. When the copper wire winding 2.1 is energized, it attracts nearby permanent magnets 3.1. By adjusting the input current frequency of the copper wire winding 2.1, the magnetic field of the copper wire winding 2.1 is adjusted. When the copper wire winding 2.1 is energized, the rotor core 3 experiences uneven force, causing it to rotate. When the rotor core 3 is subjected to the changing magnetic field of the copper wire winding 2.1, a relatively smooth circumferential force is formed, which better meets the requirements of weak magnetic field to achieve high speed performance, thereby achieving high-performance drive. The design of the concave slot 3.2 creates an uneven air gap between the rotor core 3 and the stator core 2, which can make the magnetic field of the rotor core 3 sinusoidal, thereby reducing the output torque and torque pulsation of the rotating output shaft 4.

[0029] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A tangential flux brushless motor, characterized in that: The device includes a housing (1), a stator core (2) is fixedly connected to the inner wall of the housing (1) in the circumferential direction, and a plurality of copper wire windings (2.1) are uniformly arranged in the radial direction of the stator core (2). The plurality of copper wire windings (2.1) form a corresponding radial magnetic field. A rotor core (3) is rotatably connected to the center of the housing (1). A plurality of permanent magnets (3.1) are uniformly arranged in the circumferential direction of the rotor core (3). The magnetic field of the plurality of permanent magnets (3.1) is distributed along the tangential direction. The number of copper wire windings (2.1) is different from the number of permanent magnets (3.1). A rotating output shaft (4) is fixedly connected to the axis of the rotor core (3). An eccentric cam (5) for driving is fixedly connected to the output end of the rotating output shaft (4).

2. The tangential flux brushless motor according to claim 1, characterized in that: The outer edge of the rotor core (3) is provided with several concave grooves (3.2).

3. The tangential flux brushless motor according to claim 2, characterized in that: The rotor core (3) includes a rotor connector (3.3), and the rotor connector (3.3) is fixedly connected to the rotating output shaft (4) by interference fit on the axis of the rotor connector (3.3). The rotor connector (3.3) has rotor petal blocks (3.4) evenly arranged on the outer edge of the rotor petal block (3.3). The permanent magnet (3.1) is fixedly connected between two adjacent rotor petal blocks (3.4).

4. The tangential flux brushless motor according to claim 3, characterized in that: The rotor lobe (3.4) has positioning grooves (3.4.1) on both sides for positioning permanent magnets (3.1).

5. The tangential flux brushless motor according to claim 3, characterized in that: The concave groove (3.2) is also provided between two adjacent rotor segments (3.4), and the concave groove (3.2) is provided on the radial side of the permanent magnet (3.1) away from the axis between the adjacent rotor segments (3.4) of the same group of adjacent rotor segments (3.4).

6. The tangential flux brushless motor according to claim 3, characterized in that: A magnetic isolation groove (3.5) is provided between two adjacent rotor petal blocks (3.4). The magnetic isolation groove (3.5) is located on the radial side of the permanent magnet (3.1) near the axis between the adjacent rotor petal blocks (3.4) in the same group.

7. The tangential flux brushless motor according to claim 3, characterized in that: The rotor lamination (3.4) is formed by stacking multiple rotor laminations (3.4.2). The rotor connector (3.3) has a connecting post (3.3.1) in the circumferential direction. The end of the connecting post (3.3.1) away from the axis has a cylinder (3.3.2) with a diameter larger than the connecting post (3.3.1). The multiple rotor laminations (3.4.2) are stacked along the connecting post (3.3.1) and the cylinder (3.3.2).

8. The tangential flux brushless motor according to claim 7, characterized in that: The rotor core (3) is provided with fixed clamping plates (3.6) at both ends along the axial direction. The two fixed clamping plates (3.6) are fixedly connected by multiple fixed pins (3.7). The multiple fixed pins (3.7) are arranged in a uniform array along the circumference, and each fixed pin (3.7) passes through the rotor lobe (3.4) from the middle of the rotor lobe (3.4).

9. A tangential flux brushless motor according to claim 1, characterized in that: The end of the rotating output shaft (4) away from the eccentric cam (5) is rotatably connected to the inside of the housing (1) via a fixed bearing (6). A plastic end cap (7) is fixedly connected to the housing (1) at the opening end. The stator core (2) and the rotor core (3) are both fixed inside the housing (1) via the plastic end cap (7). A directional bearing (8) is provided on the side of the plastic end cap (7) away from the stator core (2). The directional bearing (8) is used to rotatably connect the plastic end cap (7) and the other end of the rotating output shaft (4).

10. A tangential flux brushless motor according to claim 9, characterized in that: The plastic end cap (7) is provided with a three-phase connector (7.1) on the side away from the stator core (2). The connection part of the three-phase connector (7.1) is distributed in a triangular shape, and the connection part is in a straight line or a square shape.

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