Linear motor and linear compressor

Abstract

The utility model relates to the technical field of linear motors, and provides a linear motor and a linear compressor, the linear motor comprises a stator component and a mover component, the stator component comprises an inner stator, an outer stator and coils, one of the inner stator and the outer stator comprises at least two groups of stator blocks, and each stator block is provided with a coil; the rotor component comprises a connecting support and permanent magnets, each set of stator blocks corresponds to one set of permanent magnets, each set of permanent magnets are distributed in the circumferential direction of the cylindrical structure, each set of permanent magnets comprises at least two permanent magnets, and the permanent magnets in each set are distributed in the axial direction of the cylindrical structure. The magnetizing direction of the permanent magnets is parallel to the distribution direction of the cylindrical structure and the stator blocks corresponding to the permanent magnets, the south pole of one of the two adjacent permanent magnets faces the inner stator, and the south pole of the other permanent magnet faces the outer stator. Therefore, the magnetic poles of the adjacent positions of any two adjacent permanent magnets are opposite and attract each other, the magnetic field intensity of the permanent magnets is enhanced, the installation and positioning are improved, the assembly difficulty is reduced, and the positioning precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of linear motor technology, and in particular to a linear motor and a linear compressor. Background Technology

[0002] A linear compressor is a device that directly compresses gas using the linear reciprocating motion of a piston. Compared to traditional rotary compressors, it offers higher efficiency and lower mechanical losses. Traditional linear compressors rely on a crank-connecting rod mechanism to convert rotary motion into linear motion, resulting in high mechanical losses and complex lubrication systems. Therefore, some related technologies use linear motors as the drive component to directly drive the piston in linear reciprocating motion, eliminating the intermediate transmission mechanism. This significantly improves compressor efficiency and offers advantages such as compact structure and oil-free or low-lubrication operation. These compressors have become the mainstream choice for small refrigeration equipment such as medical cryogenic freezers and automotive air conditioners.

[0003] The linear compressor in the related technology has layout defects. The magnetic field at the assembly and connection of permanent magnets is weakened, the magnetic energy utilization rate is low, and the assembly is difficult. The repulsive force between permanent magnets is not conducive to the installation and positioning of each permanent magnet, resulting in poor positioning accuracy.

[0004] Therefore, how to solve the problems of weakened magnetic field at the assembly and connection of permanent magnets in linear motors, resulting in assembly difficulties and poor installation positioning accuracy, has become an important technical problem to be solved by those skilled in the art. Utility Model Content

[0005] This utility model provides a linear motor and a linear compressor to solve the defects of linear motors in related technologies, such as weakened magnetic field at the permanent magnet assembly connection, difficult assembly, and poor installation positioning accuracy, thereby reducing assembly difficulty and improving installation positioning accuracy.

[0006] This utility model provides a linear motor, comprising:

[0007] A stator component includes an inner stator, an outer stator, and a coil. One of the inner stator and the outer stator is a hollow cylindrical structure, and the other includes at least two sets of stator blocks. The sets of stator blocks are distributed circumferentially along the cylindrical structure, and each stator block is provided with the coil.

[0008] The moving part includes a connecting bracket and at least two sets of permanent magnets. Each set of permanent magnets is fixedly disposed on the connecting bracket. The permanent magnets are disposed between the stator block and the cylindrical structure. Each set of permanent magnets is distributed circumferentially along the cylindrical structure. Each set of stator blocks corresponds to one set of permanent magnets. Each set of permanent magnets includes at least two permanent magnets. Each permanent magnet in each set is distributed along the axial direction of the cylindrical structure. The magnetization direction of the permanent magnets is parallel to the distribution direction of the cylindrical structure and the stator block corresponding to the permanent magnet. The south pole of one of any two adjacent permanent magnets faces the inner stator, and the south pole of the other faces the outer stator.

[0009] According to the present invention, a linear motor is provided in which the stator block is provided with a wire threading space, the wire threading space passes through the stator block along the circumference of the cylindrical structure, the stator block is provided with a notch on the side near the moving part, the notch is connected to the wire threading space, and the coil is adapted to be sleeved on any side wall of the wire threading space.

[0010] According to the present invention, a linear motor is provided in which each stator block is provided with two threading spaces, the two threading spaces are distributed at intervals along the axial direction of the cylindrical structure, and a columnar structure is formed between the two threading spaces;

[0011] Each of the threading spaces corresponds to one coil, the coil being adapted to be sleeved on the side wall of the threading space away from the columnar structure; or, two threading spaces correspond to one coil, the coil being adapted to be sleeved on the columnar structure.

[0012] According to the present invention, in a linear motor, each stator block corresponds to two permanent magnets along the axial direction of the cylindrical structure.

[0013] Alternatively, along the axial direction of the cylindrical structure, each stator block corresponds to four permanent magnets.

[0014] According to the present invention, a linear motor is provided in which each stator block is provided with a wire threading space and each stator block corresponds to three permanent magnets along the axial direction of the cylindrical structure.

[0015] Each of the threading spaces corresponds to one of the coils, or each of the threading spaces corresponds to two of the coils.

[0016] According to the present invention, a linear motor is provided, wherein each group of stator blocks includes at least two stator blocks, and each of the stator blocks in each group is distributed along the axial direction of the cylindrical structure.

[0017] According to the present invention, a linear motor is provided in which each of the coils is connected in series, and in each group of stator blocks, the winding directions of the coils on any two adjacent groups of stator blocks are opposite.

[0018] When each stator block is provided with two coils, the two coils on each stator block are wound in opposite directions.

[0019] According to the present invention, in a linear motor, the number and direction of the coils of any two adjacent stator blocks in each group are the same.

[0020] According to the present invention, the stator block is integrally formed of soft magnetic material, or the stator block includes multiple magnetic sheets, which are stacked together.

[0021] And / or, the connecting bracket is made of a non-magnetic material.

[0022] This utility model also provides a linear compressor, including the linear motor described above.

[0023] The linear motor provided by this utility model includes a stator component and a mover component. The stator component includes an inner stator, an outer stator, and coils. One of the inner and outer stators is a hollow cylindrical structure, and the other includes at least two sets of stator blocks. The sets of stator blocks are spaced apart circumferentially along the cylindrical structure, and each stator block is provided with a coil. That is, multiple coils are distributed circumferentially around the cylindrical structure. The mover component includes a connecting bracket and at least two sets of permanent magnets. Each set of permanent magnets is fixedly mounted on the connecting bracket. The permanent magnets are disposed between the stator blocks and the cylindrical structure. Each set of permanent magnets is distributed circumferentially along the cylindrical structure, with each set of stator blocks corresponding to one set of permanent magnets. Each set of permanent magnets includes at least two permanent magnets, and each permanent magnet in each set is distributed along the axial direction of the cylindrical structure. The magnetization direction of the permanent magnets is parallel to the distribution direction of the cylindrical structure and the stator blocks corresponding to the permanent magnets. The south pole of one of any two adjacent permanent magnets faces the inner stator, and the south pole of the other faces the outer stator. By applying alternating current in the corresponding direction to each coil, an attractive or repulsive force can be generated between each coil and its corresponding permanent magnet. Ensuring that the direction of the force acting on each permanent magnet is the same allows all permanent magnets to collectively drive the connecting bracket to move relative to the coils and other stator components along the direction of the aforementioned force. This configuration ensures that the magnetic poles of any two adjacent permanent magnets are opposite at their closest points, attracting each other. This strengthens the magnetic field at the locations where two adjacent permanent magnets are close together, improving magnetic energy utilization, enhancing installation positioning, reducing assembly difficulty, and increasing positioning accuracy. It solves the problems of weakened magnetic fields at the permanent magnet assembly joints, assembly difficulties, and poor installation positioning accuracy inherent in linear motors in related technologies.

[0024] Furthermore, the linear compressor provided by this utility model also possesses the various advantages described above due to the linear motor described above. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the linear motor provided by this utility model.

[0027] Figure 2 This is a cross-sectional view of the axial section position of the linear motor provided by this utility model.

[0028] Figure 3 This is a schematic diagram of the stator block provided by this utility model.

[0029] Figure 4 This is a schematic diagram showing the relative positions of the stator and mover components in the axial section of the linear motor provided by this utility model. Figure 1 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0030] Figure 5 This is a schematic diagram showing the relative positions of the stator and mover components in the axial section of the linear motor provided by this utility model. Figure 2 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0031] Figure 6 This is a schematic diagram showing the relative positions of the stator and mover components in the axial section of the linear motor provided by this utility model. Figure 3 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0032] Figure 7 This is a schematic diagram showing the relative positions of the stator and mover components in the axial section of the linear motor provided by this utility model. Figure 4 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0033] Figure 8 This utility model provides a schematic diagram showing the relative positions of the stator and mover components in the axial section of a linear motor when the stator block is "n"-shaped. Figure 1 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0034] Figure 9 This utility model provides a schematic diagram showing the relative positions of the stator and mover components in the axial section of a linear motor when the stator block is "n"-shaped. Figure 2 (The closed curve in the figure represents the path of the magnetic field lines generated by the coil.)

[0035] Figure 10 This is a cross-sectional schematic diagram of the stator and mover components in the linear motor provided by this utility model.

[0036] Figure 11 This is a schematic diagram of the AC input to the coil provided by this utility model.

[0037] Figure label:

[0038] 1. Inner stator; 2. Coil; 3. Stator block; 4. Notch; 5. Permanent magnet; 6. Threading space; 7. Connecting bracket; 8. First column; 9. Middle crossbeam; 10. Side crossbeam. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] The following is combined Figures 1 to 11 This invention describes the linear motor of the present invention.

[0041] like Figures 1 to 11 As shown in the figure, the linear motor provided in this embodiment of the present invention includes a stator component and a mover component.

[0042] Specifically, the stator components include an inner stator 1, an outer stator, and a coil 2. One of the inner stator 1 and the outer stator is a hollow cylindrical structure, and the other includes at least two sets of stator blocks 3.

[0043] In some embodiments, the inner stator 1 is configured as a hollow cylindrical structure, and the outer stator is configured as a structure including at least two sets of stator blocks 3, as shown in the reference. Figure 10 The stator components include eight sets of stator blocks 3.

[0044] In other embodiments, the outer stator is configured as a hollow cylindrical structure, and the inner stator 1 is configured as a structure including at least two sets of stator blocks 3.

[0045] Each group of stator blocks 3 is distributed at intervals along the circumference of the cylindrical structure, and each stator block 3 is equipped with a coil 2. That is to say, the coils 2 are also arranged in groups, with each group of coils 2 distributed at intervals along the circumference of the cylindrical structure, and each group of stator blocks 3 corresponds to one group of coils 2. Around the cylindrical structure, multiple coils 2 are distributed along the circumference of the cylindrical structure.

[0046] The moving part includes a connecting bracket 7 and at least two sets of permanent magnets 5, each set of permanent magnets 5 being fixedly mounted on the connecting bracket 7. The permanent magnets 5 are disposed between the stator block 3 and the cylindrical structure, with each set of permanent magnets 5 distributed circumferentially along the cylindrical structure, and each set of stator blocks 3 corresponding to one set of permanent magnets 5.

[0047] The positions of coil 2 and stator block 3 are fixed. After coil 2 is energized, each set of permanent magnets 5 generates a force with coil 2. This force drives the permanent magnets 5 to move relative to coil 2, thereby causing the connecting bracket 7 to move relative to coil 2, thus outputting linear motion. The connecting bracket 7 can be connected to a load to drive the load's linear motion.

[0048] Each group of permanent magnets 5 includes at least two permanent magnets 5, and the permanent magnets 5 in each group are distributed along the axial direction of the cylindrical structure. The magnetization direction of the permanent magnets 5 is parallel to the distribution direction of the cylindrical structure and the stator block 3 corresponding to the permanent magnets 5. The south pole of one of any two adjacent permanent magnets 5 faces the inner stator 1, and the south pole of the other faces the outer stator. The permanent magnets 5 have a south pole and a north pole. The south pole of the permanent magnet 5 is also called the S pole of the permanent magnet, and the north pole of the permanent magnet 5 is also called the N pole of the permanent magnet. Understandably, the magnetization directions of any two adjacent permanent magnets 5 are opposite, realizing a radially and circumferentially opposite polarity Halbach permanent magnet array.

[0049] By passing alternating current in the corresponding direction to each coil 2, an attractive or repulsive force can be generated between each coil 2 and the corresponding permanent magnet 5, ensuring that the direction of the force on each permanent magnet 5 is the same. This allows each permanent magnet 5 to jointly drive the connecting bracket 7 to move relative to the stator components such as the coil 2 in the direction of the aforementioned force.

[0050] When the permanent magnet 5 moves relative to the stator component, the coil 2 interacts with the permanent magnets 5 at different positions along the axis of the cylindrical structure in each group of permanent magnets 5. By switching the direction of the current in the coil 2, the permanent magnets 5 are continuously subjected to a force in the same direction, thus enabling them to move continuously in the same direction. By increasing the number of permanent magnets 5 in each group, the stroke of the connecting bracket 7 can be increased.

[0051] With this configuration, the magnetic poles of any two adjacent permanent magnets 5 are opposite at their closest positions, attracting each other. This enhances the magnetic field strength at the closest positions of any two adjacent permanent magnets 5, thereby improving magnetic energy utilization, enhancing installation positioning, reducing assembly difficulty, and improving positioning accuracy. This solves the problems of assembly difficulties and poor installation positioning accuracy of linear motors in related technologies.

[0052] In addition, there is an air gap between the permanent magnet 5 and the cylindrical structure, and an air gap between the permanent magnet 5 and the stator block 3. The magnetic lines of force form a complete loop along the path of stator block 3-air gap-cylindrical structure-air gap-stator block 3. The magnetic circuit generated by each coil 2 is a closed magnetic circuit, which reduces magnetic leakage and improves the uniformity of air gap magnetic density, thereby achieving a significant improvement in magnetic efficiency.

[0053] It should be noted that the cylindrical structure is fixed relative to the stator block 3. When the permanent magnets 5 and the connecting brackets 7 move relative to the stator components, the cylindrical structure can provide guidance, which helps to improve the movement stability of the permanent magnets 5 and the connecting brackets 7.

[0054] Each set of stator blocks 3 and each set of permanent magnets 5 can form a modular structure. When assembling a linear motor, multiple sets of modules can be directly spliced ​​on the inside or outside of the cylindrical structure. The permanent magnets 5 of adjacent modules have an attractive force, which facilitates assembly and can greatly improve assembly efficiency.

[0055] In this embodiment of the invention, the stator block 3 is provided with a threading space 6, which extends through the stator block 3 along the circumference of the cylindrical structure. The threading space 6 provides space for the coil 2 to be threaded through, and the coil 2 can be fitted onto any side wall of the threading space 6.

[0056] A notch 4 is provided on the side of the stator block 3 near the moving part, and the notch 4 is connected to the wire threading space 6. The notch 4 divides the side of the stator block 3 near the moving part into at least two parts. When the coil 2 is energized, a magnetic field is generated around the coil 2 due to the principle of electromagnetic induction. The stator block 3 will be magnetized by the magnetic field generated by the coil 2. The parts of the stator block 3 located on both sides of the notch 4 will exhibit different polarities, and the parts of the stator block 3 located on both sides of the notch 4 will generate a magnetic force with the permanent magnet 5. The direction of the force generated by the parts of the stator block 3 located on both sides of the notch 4 on the permanent magnet 5 should be the same.

[0057] In some embodiments, each stator block 3 is provided with two threading spaces 6, which are distributed at intervals along the axial direction of the cylindrical structure, and a columnar structure is formed between the two threading spaces 6.

[0058] Reference Figures 4 to 7The stator block 3 has an "E"-shaped axial section, which coincides with the axial section of the cylindrical structure. The axial section of the cylindrical structure is the section passing through its central axis. The stator block 3 has one first column 8 and three first crossbeams. The axis of the first column 8 is parallel to the central axis of the cylindrical structure, and the three first crossbeams are parallel to each other and perpendicular to the central axis of the cylindrical structure. Among the three first crossbeams, the middle one is called the middle crossbeam 9, and the other two are called the side crossbeams 10. The middle crossbeam 9 is the columnar structure formed between the two threading spaces 6.

[0059] Each threading space 6 can correspond to one coil 2. In this case, the coil 2 can be sleeved on the side wall of the threading space 6 away from the columnar structure. Specifically, one coil 2 can be set on each side beam 10 of the stator block 3, as shown in the figure. Figure 7 Alternatively, a coil 2 can be set at the position of each of the two threading spaces 6 corresponding to the first post 8, as shown in the reference. Figure 6 .

[0060] Alternatively, two threading spaces 6 can correspond to one coil 2. In this case, coil 2 can be fitted onto the columnar structure. Specifically, coil 2 can be set on the middle crossbeam 9 of stator block 3, as shown in the reference. Figure 4 and Figure 5 .

[0061] Whether each threading space 6 corresponds to one coil 2 or two threading spaces 6 correspond to one coil 2, it is necessary to ensure that the ends of the two side beams 10 near the cylindrical structure have the same magnetic poles, and the magnetic poles of the end of the middle beam 9 near the cylindrical structure are different from the magnetic poles of the ends of the two side beams 10 near the cylindrical structure.

[0062] When the axial section of stator block 3 is "E" shaped, the closed path of the magnetic field lines generated by coil 2 is: middle crossbeam 9 - side crossbeam 10 - air gap - cylindrical structure - air gap - middle crossbeam 9, forming a symmetrical loop to avoid magnetic leakage.

[0063] In a specific embodiment, along the axial direction of the cylindrical structure, each stator block 3 can correspond to two permanent magnets 5, as shown in the reference. Figure 4 Alternatively, each stator block 3 can correspond to four permanent magnets 5, as shown in the reference. Figure 5 This results in the following: the force between the end of one of the two side beams 10 and its corresponding permanent magnet 5 is an attractive force, while the force between the end of the other beam and its corresponding permanent magnet 5 is a repulsive force.

[0064] In other embodiments, each stator block 3 is provided with a threading space 6.

[0065] Reference Figure 8 and Figure 9The axial section of stator block 3 is "n" shaped. Stator block 3 has a second column and two second crossbeams. The axis of the second column is parallel to the central axis of the cylindrical structure, and the two second crossbeams are parallel to each other and perpendicular to the central axis of the cylindrical structure.

[0066] Each threading space 6 can correspond to one coil 2. In this case, coil 2 can be sleeved on the second post, as shown in the reference. Figure 8 .

[0067] Alternatively, each threading space 6 can correspond to two coils 2. In this case, one coil 2 can be fitted onto each of the two second crossbeams, as shown in the reference. Figure 9 .

[0068] Along the axial direction of the cylindrical structure, each stator block 3 can correspond to three permanent magnets 5, as shown in the reference. Figure 8 and Figure 9 .

[0069] In this embodiment of the present invention, each group of stator blocks 3 includes at least two stator blocks 3, and each of the stator blocks 3 in each group is distributed along the axial direction of the cylindrical structure.

[0070] With this configuration, the number of stator blocks 3 and coils 2 is increased along the axial direction of the cylindrical structure. When the current value of the coils 2 is equal and the magnetic field strength of each permanent magnet 5 is the same, the total driving force between the stator components and the mover components can be increased, thereby increasing the driving force that the linear motor can generate on the load.

[0071] In this embodiment, the coils 2 of the linear motor are connected in series, specifically by using the same wire to wind the coils at various positions in sequence.

[0072] The period of alternating current (AC) refers to the time required for the current to complete one full cycle. In a standard sinusoidal alternating current, the time required for the current to return to its initial state after a complete positive-to-negative transition from any point on the waveform is called the period of the AC. Half of the AC period is called the half-cycle of the AC, which is defined here as the duration of either the positive or negative current within a single AC cycle.

[0073] The half-cycle of the alternating current is the time required for the permanent magnet 5 to move a preset distance relative to the stator block 3. The preset distance is the length of the permanent magnet 5 along the axis of the cylindrical structure.

[0074] The winding direction of the coil 2 on each stator block 3 can be preset to ensure that when powered by the same power source, each stator block 3 can exert a force on the permanent magnet 5 in the same direction.

[0075] When two coils 2 are provided on each stator block 3, the winding directions of the two coils 2 on each stator block 3 are opposite.

[0076] When each group of stator blocks 3 includes at least two stator blocks 3, the winding direction of the coils 2 on each stator block 3 in each group is the same, so that the force exerted by each stator block 3 on the permanent magnet 5 in each group is in the same direction.

[0077] Since the magnetization directions of the permanent magnets 5 corresponding to the two adjacent sets of stator blocks 3 are different, it is necessary to make the winding directions of the coils 2 on any two adjacent sets of stator blocks 3 opposite, so as to ensure that the force generated by the two sets of stator blocks 3 on the permanent magnets 5 is in the same direction.

[0078] It should be noted that multiple wires can also be used, with one wire corresponding to each coil 2, so that the coils 2 of the linear motor are connected in parallel. In this case, the winding direction of each coil 2 can be the same. When connecting the coils 2 in parallel, the energizing direction of each coil 2 needs to be determined in advance.

[0079] In each set of stator blocks 3, the number and direction of the coils 2 wound on any two adjacent blocks are the same.

[0080] In some embodiments, the stator block 3 includes multiple magnetic sheets, which are stacked together and distributed along the circumference of the cylindrical structure.

[0081] When stacking the magnetic sheets, it is necessary to control the relative position of each magnetic sheet and the distance between each magnetic sheet and the cylindrical structure, so that the shape of the stator block 3 on the side close to the cylindrical structure is consistent with the shape of the side wall of the cylindrical structure, and the distance between each position of the stator block 3 on the side close to the cylindrical structure and the side wall of the cylindrical structure is consistent.

[0082] In other embodiments, the stator block 3 is integrally formed from soft magnetic material.

[0083] Cylindrical structures can be, but are not limited to, cylindrical or rectangular structures. When the cylindrical structure is a cylindrical structure, refer to... Figure 10 The stator block 3 can be made cylindrical on the side closest to the cylindrical structure, and the magnetization direction of the permanent magnet 5 is along the diameter of the cylindrical structure. When the cylindrical structure is a square tube structure, the stator block 3 can be made planar on the side closest to the cylindrical structure, and the magnetization direction of the permanent magnet 5 is perpendicular to the side of the square tube structure corresponding to the permanent magnet 5.

[0084] It should be noted that the shape of the permanent magnet 5 must also be consistent with the shape of the side of the cylindrical structure and the shape of the side of the stator block 3 facing the cylindrical structure, so that the distances between each position of the permanent magnet 5 and the stator block 3 are consistent, and the distances between each position of the permanent magnet 5 and the cylindrical structure are consistent. When the cylindrical structure is a cylindrical structure, refer to... Figure 10 The permanent magnet 5 can be configured as a fan-shaped ring, with each group of permanent magnets 5 surrounding each other to form a hollow cylindrical shape. When the cylindrical structure is a square cylinder, the permanent magnet 5 can be configured as a flat plate.

[0085] The magnetic conductive sheet mentioned above can be, but is not limited to, silicon steel sheet.

[0086] In this embodiment, the connecting bracket 7 is made of a non-magnetic material to avoid magnetic interference with the permanent magnet 5 and the coil 2.

[0087] The connecting bracket 7 can be made of aluminum alloy, but is not limited to aluminum alloy. Aluminum alloy has a low density, which helps to reduce the mass of the connecting bracket 7 and reduce the movement resistance of the permanent magnet 5.

[0088] In summary, this embodiment of the invention employs a concentric cylindrical magnetic circuit structure, with radially magnetized permanent magnets 5 moving axially within the air gap formed by the inner stator 1 and the outer stator. Through the collaborative design of the "E"-shaped outer stator and the radially and circumferentially opposite-polarity Halbach permanent magnet array 5, a closed magnetic circuit topology is formed, optimizing the closed path of the magnetic field lines and making magnetic field superposition more efficient. This significantly improves the efficiency of converting magnetic energy into mechanical energy while reducing iron loss and eddy current loss, achieving highly efficient drive with advantages such as fast dynamic response and high power density. Furthermore, the complementary magnetic pole adsorption effect greatly reduces assembly difficulty, systematically solving the problems of magnetic circuit loss and process installation, providing a superior solution for the field of high-frequency precision linear drives.

[0089] On the other hand, this embodiment of the present invention also provides a linear compressor, including the linear motor provided in any of the above embodiments. The linear motor provided in any of the above embodiments has high installation and positioning accuracy and low assembly difficulty. Therefore, the linear compressor provided in this embodiment has the advantages of high precision and easy assembly. The derivation process of the beneficial effects of the linear compressor in this embodiment of the present invention is largely similar to the derivation process of the beneficial effects of the linear motor described above, so it will not be repeated here.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A linear motor, characterized in that, include: The stator component includes an inner stator (1), an outer stator and a coil (2). One of the inner stator (1) and the outer stator is a hollow cylindrical structure, and the other includes at least two sets of stator blocks (3). Each set of stator blocks (3) is distributed circumferentially along the cylindrical structure, and each stator block (3) is provided with the coil (2). The moving part includes a connecting bracket (7) and at least two sets of permanent magnets (5). Each set of permanent magnets (5) is fixedly disposed on the connecting bracket (7). The permanent magnets (5) are disposed between the stator block (3) and the cylindrical structure. Each set of permanent magnets (5) is distributed along the circumference of the cylindrical structure. Each set of stator blocks (3) corresponds to a set of permanent magnets (5). Each set of permanent magnets (5) includes at least two permanent magnets (5). Each of the permanent magnets (5) in each set is distributed along the axial direction of the cylindrical structure. The magnetization direction of the permanent magnets (5) is parallel to the distribution direction of the cylindrical structure and the stator block (3) corresponding to the permanent magnets (5). The south pole of one of any two adjacent permanent magnets (5) faces the inner stator (1), and the south pole of the other faces the outer stator.

2. The linear motor according to claim 1, characterized in that, The stator block (3) is provided with a threading space (6), which extends through the stator block (3) along the circumference of the cylindrical structure. The stator block (3) has a notch (4) on the side near the moving part, which is connected to the threading space (6). The coil (2) is adapted to be sleeved on any side wall of the threading space (6).

3. The linear motor according to claim 2, characterized in that, Each stator block (3) is provided with two threading spaces (6), the two threading spaces (6) are distributed at intervals along the axial direction of the cylindrical structure, and a columnar structure is formed between the two threading spaces (6); Each of the threading spaces (6) corresponds to one coil (2), the coil (2) being adapted to be sleeved on the side wall of the threading space (6) away from the columnar structure; or, two threading spaces (6) correspond to one coil (2), the coil (2) being adapted to be sleeved on the columnar structure.

4. The linear motor according to claim 3, characterized in that, Along the axial direction of the cylindrical structure, each stator block (3) corresponds to two permanent magnets (5). Alternatively, along the axial direction of the cylindrical structure, each of the stator blocks (3) corresponds to four of the permanent magnets (5).

5. The linear motor according to claim 2, characterized in that, Each of the stator blocks (3) is provided with a threading space (6), and along the axial direction of the cylindrical structure, each of the stator blocks (3) corresponds to three permanent magnets (5). Each of the threading spaces (6) corresponds to one coil (2), or each of the threading spaces (6) corresponds to two coils (2).

6. The linear motor according to any one of claims 1-5, characterized in that, Each group of stator blocks (3) includes at least two stator blocks (3), and each of the stator blocks (3) in each group is distributed along the axial direction of the cylindrical structure.

7. The linear motor according to claim 6, characterized in that, Each of the coils (2) is connected in series, and in each set of stator blocks (3), the winding directions of the coils (2) on any two adjacent sets of stator blocks (3) are opposite; When each of the stator blocks (3) is provided with two coils (2), the winding directions of the two coils (2) on each stator block (3) are opposite.

8. The linear motor according to claim 6, characterized in that, In each of the stator blocks (3) in each group, the number and direction of the coils (2) of any two adjacent ones are the same.

9. The linear motor according to any one of claims 1-5, characterized in that, The stator block (3) is integrally formed from soft magnetic material, or the stator block (3) includes multiple magnetic sheets, which are stacked together. And / or, the connecting bracket (7) is made of a non-magnetic material.

10. A linear compressor, characterized in that, Including the linear motor as described in any one of claims 1 to 9.

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