permanent magnet motors

Abstract

The present invention relates to a permanent magnet motor. The permanent magnet motor includes a stator structure, a rotor structure, a magnetic focusing structure and a magnetic isolation structure; the stator structure includes a stator body and a plurality of stator teeth provided on the stator body; the rotor structure is arranged corresponding to the stator structure, including a rotor body and a plurality of rotor teeth provided on the rotor body, and the plurality of rotor teeth correspond to the plurality of stator teeth; the magnetic focusing structure includes a plurality of magnetic focusing units corresponding to the ends of the plurality of rotor teeth or / and the ends of the plurality of stator teeth; each magnetic focusing unit includes a plurality of first permanent magnets provided in the rotor teeth or / and the stator teeth, and a soft magnetic body spaced apart from the plurality of first permanent magnets, and the magnetization directions of the plurality of first permanent magnets converge at one point; the magnetic isolation structure includes a first magnetic isolation bridge provided at the end of the first permanent magnet in the magnetic focusing unit. The present invention can solve the problem that the output power of the motor is relatively small and the output power is relatively weak due to the unreasonable structural setting of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a permanent magnet motor. Background Art

[0002] With the rapid development of intelligent robots, high-end machine tools, the 3C industry, laser cutting, LCD panels, and the lithium battery industry, motors are gaining increasing attention as the means of enabling their automated operations. Furthermore, the current mainstream motor solution generally uses permanent magnet motors. However, in traditional technologies, some permanent magnet motors suffer from relatively low output power and weak power due to their irrational structural design. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that in the related art, due to the unreasonable structural setting of the motor, its output power is relatively small and the output power is relatively weak.

[0004] In order to solve the above technical problems, the present invention provides a permanent magnet motor, comprising:

[0005] A stator structure comprising a stator body and a plurality of stator teeth provided on the stator body;

[0006] A mover structure is provided corresponding to the stator structure; the mover structure includes a mover body and a plurality of mover teeth provided on the mover body, the plurality of mover teeth corresponding to the plurality of stator teeth;

[0007] The magnetic concentrating structure includes a plurality of magnetic concentrating units correspondingly provided at the ends of the plurality of movable teeth and / or the ends of the plurality of stator teeth; each of the magnetic concentrating units includes a plurality of permanent magnets provided in the movable teeth and / or the stator teeth, and soft magnets spaced apart from the plurality of permanent magnets in pairs, and the magnetization directions of the plurality of permanent magnets intersect at a point;

[0008] The magnetic isolation structure is provided in the magnetic focusing structure, and includes a first magnetic isolation bridge provided at the end of the first permanent magnet in the magnetic focusing unit.

[0009] Optionally, the first magnetic isolation bridge includes a first magnetic isolation groove provided at both ends of each first permanent magnet in the magnetic focusing unit, and the first magnetic isolation groove extends along the magnetization direction of the first permanent magnet.

[0010] Optionally, the first magnetic isolation bridge includes a second permanent magnet embedded in each of the first magnetic isolation slots.

[0011] Optionally, when a plurality of the magnetic focusing units are provided at the end of the same movable tooth or the end of the same stator tooth, the magnetic isolation structure includes a second magnetic isolation bridge provided between the opposite ends of two adjacent first permanent magnets of two adjacent magnetic focusing units.

[0012] Optionally, the magnetic isolation structure includes a third magnetic isolation bridge;

[0013] The third magnetic isolation bridge includes a third magnetic isolation groove provided on the inner wall surface of the stator tooth slot between two adjacent stator teeth.

[0014] Optionally, the magnetic isolation structure includes a fourth magnetic isolation bridge;

[0015] The fourth magnetic isolation bridge includes a fourth magnetic isolation groove provided on the inner wall surface of the mover tooth slot between two adjacent mover teeth.

[0016] Optionally, an installation cavity is provided at the end of the mover tooth or the end of the stator tooth, and the magnetic focusing unit is installed in the installation cavity.

[0017] Optionally, the soft magnetic body and the first permanent magnet are bonded together to form the magnetic concentrating unit.

[0018] Optionally, the mover teeth or the stator teeth are configured as soft magnetic structures;

[0019] A plurality of the mounting cavities are provided at intervals at the ends of the mover teeth or the ends of the stator teeth, and a plurality of the first permanent magnets are disposed in the plurality of mounting cavities in a one-to-one correspondence to form the magnetic concentrating unit.

[0020] Optionally, windings are provided on the stator teeth or the mover teeth.

[0021] Optionally, the permanent magnet motor is configured as a rotary motor, a linear motor, or a U-shaped motor.

[0022] The technical solution provided by the present invention has the following advantages:

[0023] The permanent magnet motor provided by the present invention has a magnetic field structure formed by multiple first permanent magnets whose magnetization directions converge at one point, which is arranged on at least one of the stator structure and the rotor structure. This can significantly reduce the leakage flux of the motor, fully utilize the magnetic energy of each first permanent magnet, and thus output a greater electromagnetic force. Moreover, by arranging the first permanent magnets in the magnetic field structure with soft magnets at intervals and then interacting with the stator teeth, a high-frequency changing magnetic field can be formed. By changing the width of the first permanent magnets, soft magnets, and stator teeth, magnetic field waveforms with various changing trends can be modulated. The electromagnetic force can be significantly increased by increasing the magnetic field frequency, and the electromagnetic force fluctuations can be smoothed by modulating a magnetic field waveform with a specific trend, thereby improving the motor performance. Moreover, by arranging a magnetic isolation bridge at the end of the first permanent magnet in the magnetic field unit of the magnetic field structure to form a magnetic isolation structure, most of the leakage flux generated by the soft magnets in the magnetic field structure can be almost eliminated, thereby achieving magnetic field modulation and improving the leakage flux problem. In this way, the motor performance can be improved, its output power and output power can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a schematic cross-sectional structural diagram of a permanent magnet motor according to an embodiment of the present invention configured as a rotating motor;

[0026] Figure 2 This is a schematic diagram of the longitudinal cross-section structure when the permanent magnet motor according to an embodiment of the present invention is configured as a U-shaped motor;

[0027] Figure 3 This is a schematic diagram of the longitudinal cross-section structure of the permanent magnet motor according to an embodiment of the present invention when it is set as a linear motor. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the longitudinal cross-section structure of the permanent magnet motor according to an embodiment of the present invention when it is set as a linear motor. Figure 2 ;

[0029] Figure 5 This is a schematic diagram of the longitudinal cross-section structure of the permanent magnet motor according to an embodiment of the present invention when it is set as a linear motor. Figure 3 ;

[0030] Figure 6 This is a schematic diagram of the longitudinal cross-section structure of the permanent magnet motor according to an embodiment of the present invention when it is set as a linear motor. Figure 4 .

[0031] In the figure: 10, permanent magnet motor; 100, stator structure; 110, stator body; 120, stator teeth; 130, stator slots; 200, mover structure; 210, mover body; 220, mover teeth; 230, mover slots; 300, magnetic concentration structure; 310, first permanent magnet; 400, magnetic isolation structure; 410, first magnetic isolation bridge; 420, second magnetic isolation bridge. DETAILED DESCRIPTION

[0032] The technical solutions of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the present invention and the features therein may be combined with each other unless there is a conflict.

[0033] In the description of the present invention, it should be noted that the terms "upper, lower, top, bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are relative to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0034] It should be noted that, in the present invention, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0035] like Figures 1 to 3As shown, the present invention provides a permanent magnet motor 10, including a stator structure 100, a mover structure 200 arranged corresponding to the stator structure 100, a magnetic field collecting structure 300 arranged on the stator structure 100 and / or the mover structure 200, and a magnetic field isolation structure 400 arranged in the magnetic field collecting structure 300.

[0036] Specifically, the stator structure 100 may include a stator body 110 and a plurality of stator teeth 120 disposed on the stator body 110. Furthermore, the rotor structure 200 may include a rotor body 210 and a plurality of rotor teeth 220 disposed on the rotor body 210, wherein the plurality of rotor teeth 220 correspond to the plurality of stator teeth 120. Furthermore, the magnetic concentrating structure 300 may include a plurality of magnetic concentrating units disposed at the ends of the plurality of rotor teeth 220 and / or the ends of the plurality of stator teeth 120. Each magnetic concentrating unit includes a plurality of first permanent magnets 310 disposed in the rotor teeth 220 and / or the stator teeth 120, and soft magnetic elements spaced apart from the plurality of first permanent magnets 310 in pairs, with the magnetization directions of the plurality of first permanent magnets 310 converging at a point. Furthermore, the magnetic isolation structure 400 may include a first magnetic isolation bridge 410 disposed at the end of each first permanent magnet 310 in the magnetic concentrating unit.

[0037] The magnetic field concentrating structure 300, formed by multiple first permanent magnets 310 whose magnetization directions converge at a point, is disposed on at least one of the stator structure 100 and the rotor structure 200. This significantly reduces magnetic flux leakage from the motor, fully utilizing the magnetic energy of each first permanent magnet 310 and thereby outputting a greater electromagnetic force. Furthermore, by arranging the first permanent magnets 310 in the magnetic field concentrating structure 300 with soft magnets and interacting with the stator teeth 120, a high-frequency magnetic field can be generated. By varying the widths of the first permanent magnets 310, the soft magnets, and the stator teeth 120, various magnetic field waveforms with varying trends can be modulated. This significantly increases the electromagnetic force by increasing the magnetic field frequency, and smoothes electromagnetic force fluctuations by modulating a specific magnetic field waveform, thereby improving motor performance. Furthermore, by providing magnetic isolation bridges at the ends of the first permanent magnets 310 in the magnetic concentrating units of the magnetic field concentrating structure 300 to form a magnetic isolation structure 400, most of the magnetic flux leakage generated by the soft magnets in the magnetic field concentrating structure 300 can be virtually eliminated, achieving magnetic field modulation while also improving magnetic field leakage. In this way, the performance of the motor can be improved, its output power and output power can be increased.

[0038] Furthermore, in some embodiments, the magnetic focusing structure 300 may be provided at the end of the movable tooth 220 of the movable structure 200. Specifically, at least one magnetic focusing unit may be provided at the end of each movable tooth 220, that is, one magnetic focusing unit or multiple magnetic focusing units may be provided at the end of each movable tooth 220. Moreover, each magnetic focusing unit provided at the end of the movable tooth 220 may include a plurality of first permanent magnets 310 provided at the end of the movable tooth 220, and soft magnets spaced apart from the plurality of first permanent magnets 310 in pairs, and the magnetization directions of the plurality of first permanent magnets 310 may intersect at one point (they may intersect at one point in the forward direction or in the reverse direction).

[0039] Furthermore, in other embodiments, the magnetic concentrating structure 300 may be disposed at the end of the stator teeth 120 of the stator structure 100. Specifically, at least one magnetic concentrating unit may be disposed at the end of each stator tooth 120, that is, one magnetic concentrating unit or multiple magnetic concentrating units may be disposed at the end of each stator tooth 120. Furthermore, each magnetic concentrating unit disposed at the end of the stator tooth 120 may include a plurality of first permanent magnets 310 disposed at the end of the stator tooth 120, and soft magnets spaced apart from the plurality of first permanent magnets 310 in pairs, with the magnetization directions of the plurality of first permanent magnets 310 intersecting at a point.

[0040] In addition, in other embodiments, the magnetic field focusing structure 300 may also be provided at both the end of the movable teeth 220 of the movable structure 200 and the end of the stator teeth 120 of the stator structure 100 .

[0041] Furthermore, a mounting cavity is provided at the end of the movable tooth 220 or the end of the stator tooth 120, and the magnetic field focusing unit is installed in the mounting cavity. That is, the magnetic field focusing unit is installed in the mounting cavity of the movable tooth 220 or the stator tooth 120, so that the magnetic field focusing structure 300 is disposed on the movable tooth 220 or the stator tooth 120.

[0042] Furthermore, in some embodiments, the soft magnetic material and the first permanent magnet 310 can be bonded together to form a magnetic field unit. Specifically, at least one soft magnetic material and multiple first permanent magnets 310 are bonded together and then installed in a mounting cavity to form a magnetic field unit. This allows the traditional magnetic field unit (a structure formed by multiple permanent magnets arranged closely together) to be split apart and a soft magnetic material (i.e., a soft magnetic material) to be embedded in the middle, thereby achieving magnetic field modulation and improving the magnetic flux leakage problem in traditional magnetic field modulation schemes.

[0043] In addition, in other embodiments, the movable teeth 220 or the stator teeth 120 are configured as soft magnetic structures; moreover, a plurality of mounting cavities are spaced apart at the ends of the movable teeth 220 or the ends of the stator teeth 120, and a plurality of first permanent magnets 310 can be disposed in the plurality of mounting cavities in a one-to-one correspondence to form a magnetic focusing unit. That is, the movable teeth 220 or the stator teeth 120 can be directly configured as soft magnetic structures, and a plurality of first permanent magnets 310 can be spaced apart and installed in a plurality of mounting cavities on the movable teeth 220 or the stator teeth 120, so that the cavity walls of the mounting cavities of the soft magnetic structure separate the first permanent magnets 310 to form a split magnetic focusing structure in which the first permanent magnets 310 and the soft magnetic structure are spaced apart. This can also achieve magnetic field modulation and improve the magnetic leakage problem.

[0044] Furthermore, each magnetic concentrating unit may be provided with two first permanent magnets 310, three first permanent magnets 310, four first permanent magnets 310, and so on. That is, each magnetic concentrating unit may be provided with more than two first permanent magnets 310 as needed. Furthermore, in each magnetic concentrating unit, the shape of each first permanent magnet 310 may be configured as needed, and may be a regular polygonal shape such as a rectangle or a trapezoid, or an irregular shape, as long as the magnetization directions of the multiple first permanent magnets 310 converge from multiple directions toward a central point, or diverge from a central point in multiple directions.

[0045] In addition, if Figure 3 As shown, the first magnetic isolation bridge 410 may include a first magnetic isolation groove provided at both ends of each first permanent magnet 310 in the magnetic concentrating unit, and the first magnetic isolation groove extends along the magnetization direction of the first permanent magnet 310. A plurality of first permanent magnets 310 are spaced apart in each magnetic concentrating unit, and a first magnetic isolation groove is provided at both ends of each first permanent magnet 310. This can isolate magnetic flux from two adjacent first permanent magnets 310, thereby eliminating magnetic leakage generated when the plurality of first permanent magnets 310 in the magnetic concentrating unit are separated.

[0046] Furthermore, the first magnetic isolation groove can be disposed adjacent to the end of the first permanent magnet 310, that is, spaced apart from the mounting cavity for the first permanent magnet 310. Alternatively, the first magnetic isolation groove can be disposed directly adjacent to the end of the first permanent magnet 310, that is, directly connected to the mounting cavity for the first permanent magnet 310. Furthermore, the configuration of the first magnetic isolation groove can be designed based on the shape of the space between the opposing ends of two adjacent first permanent magnets 310, thereby isolating the two first permanent magnets 310 from their ends and eliminating magnetic flux leakage.

[0047] Furthermore, if Figure 4 As shown, the first magnetic isolation bridge 410 may include a second permanent magnet 412 embedded in each first magnetic isolation slot. By installing the second permanent magnet 412 in the first isolation slot, the magnetic field density of the motor can be further increased, thereby further increasing the power density of the motor.

[0048] In addition, if Figure 5 As shown, when the permanent magnet motor is relatively large, multiple magnetic concentrators can be provided at the end of the same rotor tooth 220 or the end of the same stator tooth 120. The magnetic isolation structure 400 can include a second magnetic isolation bridge 420 provided between the opposite ends of two adjacent first permanent magnets 310 of two adjacent magnetic concentrators. That is, when multiple magnetic concentrators are provided on a rotor tooth 220 or a stator tooth 120, a magnetic isolation bridge can also be provided between two adjacent magnetic concentrators to isolate them and eliminate magnetic leakage.

[0049] Furthermore, the second magnetic isolation bridge 420 may also include a second magnetic isolation groove disposed between the opposite ends of two adjacent first permanent magnets 310 of two adjacent magnetic concentrating units. That is, if there are two adjacent magnetic concentrating units among the plurality of magnetic concentrating units, and the two adjacent magnetic concentrating units have two adjacent first permanent magnets 310, and the two adjacent first permanent magnets 310 each have opposite ends close to each other, a second magnetic isolation groove may be disposed between the two opposite ends to isolate the two adjacent magnetic concentrating units from magnetic field.

[0050] Furthermore, a second magnetic isolation groove may be provided between two adjacent first permanent magnets 310, or a second magnetic isolation groove may be provided near the end of one of the first permanent magnets 310, or a second magnetic isolation groove may be provided near the end of each first permanent magnet 310. Figure 6 As shown, the second magnetic isolation bridge 420 may also include a second permanent magnet 412 embedded in the second isolation slot, which can further improve the magnetic field density of the motor, thereby further improving the power density of the motor.

[0051] Similarly, the arrangement of the second magnetic isolation groove can be designed according to the shape of the space between the opposite ends of two adjacent first permanent magnets 310, so as to isolate the two first permanent magnets 310 from their ends and eliminate magnetic leakage.

[0052] Furthermore, in some embodiments, the magnetic isolation structure 400 may include a third magnetic isolation bridge disposed at the stator slot 130 between two adjacent stator teeth 120. Furthermore, the third magnetic isolation bridge may include a third magnetic isolation groove disposed on the inner wall surface of the stator slot 130 between two adjacent stator teeth 120. That is, the third magnetic isolation grooves may be disposed at the plurality of stator slots 130 between the plurality of stator teeth 120 of the stator structure 100, thereby eliminating magnetic field leakage and further improving magnetic field efficiency.

[0053] Furthermore, each stator slot 130 may be provided with a first magnetic isolation cavity, in which a first permanent magnet 310 is also mounted. Furthermore, a third magnetic isolation slot may be provided at each end of the first permanent magnet 310 disposed in the stator slot 130. This reduces magnetic flux leakage from the first permanent magnet 310 in the stator structure 100 near the air gap, thereby increasing the magnetic resistance of this leakage magnetic path and strengthening the main magnetic path.

[0054] Furthermore, the third magnetic isolation slot can be disposed adjacent to the end of the first permanent magnet 310 disposed in the stator slot 130, that is, spaced apart from the first magnetic isolation cavity of the first permanent magnet 310. Furthermore, the third magnetic isolation slot can also be connected to the end of the first permanent magnet 310 disposed in the stator slot 130, that is, directly connected to the first magnetic isolation cavity of the first permanent magnet 310. Furthermore, the third magnetic isolation bridge can further include a third permanent magnet disposed in the third magnetic isolation slot, which can further increase the magnetic field density of the motor, thereby further improving the power density of the motor.

[0055] Furthermore, in other embodiments, the magnetic isolation structure 400 may include a fourth magnetic isolation bridge disposed at the mover tooth slot 230 between two adjacent mover teeth 220. Furthermore, the fourth magnetic isolation bridge may include a fourth magnetic isolation groove disposed on the inner wall surface of the mover tooth slot 230 between two adjacent mover teeth 220. That is, the fourth magnetic isolation groove may be disposed at multiple mover tooth slots 230 between multiple mover teeth 220 of the mover structure 200, thereby eliminating magnetic field leakage and further improving magnetic field efficiency.

[0056] Furthermore, each mover slot 230 may be provided with a second magnetic isolation cavity, in which the first permanent magnet 310 is also mounted. Furthermore, a fourth magnetic isolation slot may be provided at each end of the first permanent magnet 310 disposed in the mover slot 230. This reduces magnetic flux leakage from the first permanent magnet 310 in the mover structure 200 near the air gap, thereby increasing the magnetic resistance of this leakage magnetic path and strengthening the main magnetic path.

[0057] Similarly, the fourth magnetic isolation slot can be positioned adjacent to the end of the first permanent magnet 310 disposed in the mover slot 230, that is, spaced apart from the second magnetic isolation cavity of the first permanent magnet 310. Furthermore, the fourth magnetic isolation slot can also be connected to the end of the first permanent magnet 310 disposed in the mover slot 230, that is, directly connected to the second magnetic isolation cavity of the first permanent magnet 310. Furthermore, the fourth magnetic isolation bridge can further include a fourth permanent magnet disposed in the fourth magnetic isolation slot, further improving the power density of the motor.

[0058] Furthermore, in other embodiments, the magnetic isolation structure 400 may include a third magnetic isolation bridge disposed on the inner wall surface of a stator slot 130 between two adjacent stator teeth 120, and a fourth magnetic isolation bridge disposed on the inner wall surface of a mover slot 230 between two adjacent mover teeth 220. That is, the third magnetic isolation bridge may be disposed in the plurality of stator slots 130 between the plurality of stator teeth 120 of the stator structure 100, and the fourth magnetic isolation bridge may be disposed in the plurality of mover slots 230 between the plurality of mover teeth 220 of the mover structure 200, thereby further improving the magnetic field efficiency.

[0059] In addition, a winding 500 is provided on the stator teeth 120 or the rotor teeth 220. The winding 500 can be provided on the stator teeth 120 or the rotor teeth 220.

[0060] In addition, the first permanent magnet 310, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet may all be permanent magnet structures made of neodymium iron boron material, ferrite material, or samarium cobalt material. The soft magnet may be a soft magnetic structure made of silicon steel material, pure iron material, electrical steel material, or permalloy material.

[0061] In addition, the permanent magnet motor 10 can be configured as a rotary motor (eg Figure 1 As shown), or U-shaped motor (as Figure 2 as shown), or linear motors (as Figure 3 As shown in the figure). The permanent magnet motor can be set to various different motors according to needs, which can perfectly combine the respective advantages of the magnetic field structure and the magnetic field modulation theory to achieve the purpose of increasing the motor output.

[0062] Obviously, the embodiments described above are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, those skilled in the art may make other different forms of changes or modifications without making any creative work, and all of these should fall within the scope of protection of the present invention.

Claims

1. A permanent magnet motor, characterized in that: include: A stator structure comprising a stator body and a plurality of stator teeth provided on the stator body; A mover structure is provided corresponding to the stator structure; the mover structure includes a mover body and a plurality of mover teeth provided on the mover body, the plurality of mover teeth corresponding to the plurality of stator teeth; The magnetic concentrating structure includes a plurality of magnetic concentrating units correspondingly provided at the ends of the plurality of movable teeth and / or the ends of the plurality of stator teeth; each of the magnetic concentrating units includes a plurality of first permanent magnets provided in the movable teeth and / or the stator teeth, and a soft magnetic body spaced apart from the plurality of first permanent magnets in pairs, and the magnetization directions of the plurality of first permanent magnets intersect at a point; A magnetic isolation structure is provided in the magnetic focusing structure, comprising a first magnetic isolation bridge provided at the end of the first permanent magnet in the magnetic focusing unit; The first magnetic isolation bridge includes a first magnetic isolation groove provided at both ends of each of the first permanent magnets in the magnetic focusing unit, and the first magnetic isolation groove extends along the magnetization direction of the first permanent magnet; the first magnetic isolation bridge includes a second permanent magnet embedded in each of the first magnetic isolation grooves.

2. The permanent magnet motor according to claim 1, characterized in that When a plurality of the magnetic focusing units are provided at the end of the same movable tooth or the end of the same stator tooth, the magnetic isolation structure includes a second magnetic isolation bridge provided between opposite ends of two adjacent first permanent magnets of two adjacent magnetic focusing units.

3. The permanent magnet motor according to claim 1, characterized in that: The magnetic isolation structure includes a third magnetic isolation bridge; The third magnetic isolation bridge includes a third magnetic isolation groove provided on the inner wall surface of the stator tooth slot between two adjacent stator teeth.

4. The permanent magnet motor according to claim 1, characterized in that: The magnetic isolation structure includes a fourth magnetic isolation bridge; The fourth magnetic isolation bridge includes a fourth magnetic isolation groove provided on the inner wall surface of the mover tooth slot between two adjacent mover teeth.

5. The permanent magnet motor according to any one of claims 1 to 4, characterized in that: An installation cavity is provided at the end of the movable tooth or the end of the stator tooth, and the magnetic focusing unit is installed in the installation cavity.

6. The permanent magnet motor according to claim 5, characterized in that: The soft magnetic body and the first permanent magnet are bonded together to form the magnetic concentrating unit.

7. The permanent magnet motor according to claim 6, characterized in that: The mover teeth or the stator teeth are configured as a soft magnetic structure; A plurality of the mounting cavities are provided at intervals at the ends of the mover teeth or the ends of the stator teeth, and a plurality of the first permanent magnets are disposed in the plurality of mounting cavities in a one-to-one correspondence to form the magnetic concentrating unit.

8. The permanent magnet motor according to any one of claims 1 to 4, characterized in that: The permanent magnet motor is configured as a rotary motor, a linear motor, or a U-shaped motor.

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