Multi-working-magnetic-potential hybrid excitation linear motor

Abstract

The invention discloses a multi-working-magnetic-potential hybrid excitation linear motor. The multi-working-magnetic-potential hybrid excitation linear motor comprises an armature primary side, an excitation primary side and a secondary side located between the armature primary side and the excitation primary side. The armature primary side comprises a plurality of armature teeth, and each armature tooth is wound with an armature winding; the excitation primary side comprises a plurality of excitation teeth, each excitation tooth is wound with an excitation winding, and each excitation tooth is provided with a permanent magnet array; the secondary side includes a plurality of segmented modulation blocks. According to the multi-working-magnetic-potential hybrid excitation linear motor provided by the embodiment of the invention, the split primary structure is adopted, so that the problem of space limitation caused by the fact that the armature winding and the excitation winding in the hybrid excitation motor in the related technology are on the same side can be solved to a great extent, and the conflict between an electric load and a magnetic load caused by the fact that the armature winding and the permanent magnet are on the same side is effectively weakened; and additional air-gap magnetic field working harmonic waves are introduced, so that the defect of average thrust of a traditional consequent pole structure is overcome.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a multi-working magnetic potential hybrid excitation linear motor. Background Art

[0002] Permanent magnet synchronous linear motors do not require intermediate transmission mechanisms and additional mechanical structures, and can achieve high efficiency direct drive and low vibration and noise operation. They are widely used in transportation, industrial control, civil medicine and other fields. Permanent magnet synchronous linear motors are gradually developing towards higher thrust density, higher power factor, and higher performance efficiency.

[0003] In the hybrid excitation motor of the related art, the armature winding and the excitation winding are arranged on the same side, which leads to problems such as space limitation and heat dissipation difficulty. The armature winding and the permanent magnet on the same side cause conflicts between the electric load and the magnetic load.

[0004] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present application is to provide a multi-working magnetic potential hybrid excitation linear motor. In order to have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its only purpose is to present some concepts in a simple form as a preface to the detailed description that follows.

[0006] According to one aspect of an embodiment of the present application, a multi-working magnetic potential hybrid excitation linear motor is provided, comprising an armature primary side, an excitation primary side, and a secondary side located between the armature primary side and the excitation primary side; the armature primary side comprises a plurality of armature teeth, each of which is wound with an armature winding; the excitation primary side comprises a plurality of excitation teeth, each of which is wound with an excitation winding, and each of which is provided with a permanent magnet array; the secondary side comprises a plurality of segmented modulation blocks.

[0007] In some embodiments of the present application, the multi-working magnetic potential hybrid excitation linear motor also includes a double air gap region, and the double air gap region includes an upper air gap region and a lower air gap region, the upper air gap region is located between the primary side of the armature and the secondary side, and the lower air gap region is located between the primary side of the excitation and the secondary side.

[0008] In some embodiments of the present application, the primary side of the armature includes three armature tooth groups, each of which includes two armature teeth; the armature winding adopts a concentrated winding structure, and the armature windings wound on the armature teeth of the same armature tooth group are of the same phase.

[0009] In some embodiments of the present application, the primary side of the excitation includes three excitation tooth groups, each of which includes two excitation teeth; the center line of each excitation tooth coincides with the center line of the corresponding armature tooth, and the end width of the excitation tooth is consistent with the end width of the corresponding armature tooth.

[0010] In some embodiments of the present application, the permanent magnet array includes a first permanent magnet and a second permanent magnet, and the permanent magnet array at the end of each group of excitation teeth is arranged in Fe / N / Fe / NN / Fe / N / Fe or Fe / S / Fe / SS / Fe / S / Fe.

[0011] In some embodiments of the present application, the width of the permanent magnet and the width of the ferromagnetic pole are symmetrically arranged about the center line of the excitation tooth, the width of the inner permanent magnet is consistent with the width of the inner ferromagnetic pole, and the width of the outer permanent magnet is consistent with the width of the outer ferromagnetic pole; the magnetization direction of the permanent magnet is vertically upward or vertically downward.

[0012] In some embodiments of the present application, the excitation winding on the primary side of the excitation adopts a concentrated winding structure, and the excitation direction is consistent with the magnetization direction of the permanent magnet at the end of the excitation tooth.

[0013] In some embodiments of the present application, the multi-working magnetic potential hybrid excitation linear motor further includes an assembly bracket, and the segmented modulation block is fixed on the assembly bracket.

[0014] In some embodiments of the present application, the assembly bracket includes two non-magnetic aluminum rods, two modulation block supports arranged parallel to each other, and two end plates arranged parallel to each other, and the same ends of the two modulation block supports in the length direction are respectively connected by a non-magnetic aluminum rod and an end plate; the modulation block is placed between the two modulation block supports, and the gap between the assembly bracket and the segmented modulation block is filled with epoxy resin.

[0015] In some embodiments of the present application, the end of the excitation tooth includes a first ferromagnetic pole and a second ferromagnetic pole;

[0016] The width of the first permanent magnet is equal to the width of the first ferromagnetic pole, the width of the second permanent magnet is equal to the width of the second ferromagnetic pole, and the width of the end of the excitation tooth is the sum of the width of the first permanent magnet, the width of the second permanent magnet, the width of the first ferromagnetic pole, and the width of the second ferromagnetic pole;

[0017] Width w of the excitation tooth end t 、Permanent magnet pole pitch τ pm and secondary pole distance τ s satisfy

[0018] 6*w at =12*τ pm =a*τ s, wherein a is the modulation level; the permanent magnet pole pitch is the pole pitch between the first permanent magnet and the second permanent magnet, and the distance between two adjacent segmented modulation blocks (31) is the secondary pole pitch;

[0019] The distance between the center lines of the same group of excitation teeth is x1=2*τ s ;

[0020] The distance between the center lines of each group of excitation teeth on the same side

[0021] When the total height of the motor remains unchanged, the total height of the armature primary h ap Less than the total height of the primary excitation h fp .

[0022] The technical solution provided by one aspect of the embodiments of the present application may have the following beneficial effects:

[0023] The multi-working magnetic potential hybrid excitation linear motor provided in the embodiment of the present application adopts a split primary structure, which can largely solve the problems of space limitation and heat dissipation difficulty caused by the armature winding and the excitation winding being arranged on the same side in the hybrid excitation motor of the related art, and effectively reduce the conflict between the electric load and the magnetic load caused by the armature winding and the permanent magnet on the same side. In addition, additional air gap magnetic field working harmonics are introduced in the double air gap area to make up for the lack of average thrust of the traditional alternating pole structure.

[0024] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic structural diagram of a multi-working magnetic potential hybrid excitation linear motor according to an embodiment of the present application is shown.

[0027] Figure 2 A schematic structural diagram of a multi-working magnetic potential hybrid excitation linear motor according to an embodiment of the present application is shown.

[0028] Figure 3 A structural schematic diagram of an assembly bracket according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0030] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0031] In view of the problems that the armature winding and the excitation winding are arranged on the same side in the hybrid excitation motor of the related art, resulting in space limitation, heat dissipation difficulties, and the conflict between the electric load and the magnetic load caused by the armature winding and the permanent magnet on the same side, an embodiment of the present application provides a multi-working magnetic potential hybrid excitation linear motor, which may include an armature primary side, an excitation primary side, and a secondary side located between the armature primary side and the excitation primary side; the armature primary side includes a plurality of armature teeth, each of which is wound with an armature winding; the excitation primary side includes a plurality of excitation teeth, each of which is wound with an excitation winding, and each of which is provided with a permanent magnet array; the secondary side includes a plurality of segmented modulation blocks. The embodiment of the present application adopts a split primary structure, which can effectively solve the problems of space limitation and heat dissipation difficulties caused by the armature winding and the excitation winding being arranged on the same side in the hybrid excitation motor of the related art, and effectively reduce the conflict between the electric load and the magnetic load caused by the armature winding and the permanent magnet on the same side.

[0032] In some embodiments, the multi-working magnetic potential hybrid excitation linear motor also includes a double air gap region, and the double air gap region includes an upper air gap region and a lower air gap region, the upper air gap region is located between the primary side of the armature and the secondary side, and the lower air gap region is located between the primary side of the excitation and the secondary side.

[0033] In some embodiments, the primary side of the armature includes three armature tooth groups, each of which includes two armature teeth; the armature winding adopts a concentrated winding structure, and the armature winding wound on the armature teeth of the same armature tooth group is of the same phase. The concentrated winding structure can achieve a higher winding filling rate in a limited space, thereby improving the power output and efficiency of the motor; the armature teeth in the same armature tooth group are wound with the same phase of the winding, which can effectively reduce the mutual inductance and reactance between the windings and improve the dynamic performance of the motor; the concentrated winding structure of the armature tooth group makes the arrangement and connection of the winding simpler, which is convenient for production and assembly, and helps to reduce manufacturing costs; in addition, the design of the concentrated winding helps to evenly distribute heat, reduce the risk of local overheating, and improve the reliability and life of the motor. Due to the relative symmetry of the structure and the concentration of current, the motor can provide better torque response during starting and braking, and improve the overall performance; this structure on the primary side of the armature can optimize the electromagnetic field distribution of the motor, reduce noise and vibration, and improve the stability of operation.

[0034] In some embodiments, the primary side of the excitation includes three excitation tooth groups, each of which includes two excitation teeth; the center line of each excitation tooth coincides with the center line of the corresponding armature tooth, and the end width of the excitation tooth is consistent with the end width of the corresponding armature tooth. The coincidence of the center lines of the excitation teeth and the armature teeth helps to improve the electromagnetic coupling efficiency and ensure more effective flux transfer, thereby increasing the output power of the motor; the end width of the excitation teeth is consistent with the armature teeth, which helps to form a uniform air gap magnetic field, reduce magnetic field fluctuations, and improve the stability and efficiency of the motor operation; the structure of the primary side of the excitation can reduce eddy current losses and hysteresis losses, thereby improving the overall energy efficiency of the motor; the layout of the excitation tooth group is reasonable, which helps air circulation, improves heat dissipation, and extends the service life of the motor. Structural symmetry and consistency can reduce mechanical vibration and noise and improve the smooth operation of the motor. This design helps to provide higher torque at startup and improve the dynamic response capability of the motor.

[0035] In some embodiments, the permanent magnet array includes a first permanent magnet and a second permanent magnet, and the permanent magnet array at the end of each group of excitation teeth is arranged in the form of Fe / N / Fe / NN / Fe / N / Fe or Fe / S / Fe / SS / Fe / S / Fe. This arrangement uses permanent magnets of different polarities to be arranged alternately (such as Fe / N / Fe / N or Fe / S / Fe / S), which can form a stronger and more uniform magnetic field and improve the output power of the motor. By using permanent magnets of different widths, additional air gap magnetic field working harmonics are introduced in the double air gap area to achieve multi-air gap magnetic density operation, make up for the lack of average thrust of the traditional alternating pole structure, and further improve the thrust density of the motor.

[0036] In some embodiments, the width of the permanent magnet and the width of the ferromagnetic pole are symmetrically arranged about the center line of the excitation tooth, the width of the inner permanent magnet is consistent with the width of the inner ferromagnetic pole, and the width of the outer permanent magnet is consistent with the width of the outer ferromagnetic pole; the magnetization direction of the permanent magnet is vertically upward or vertically downward. The symmetrical design of the width of the permanent magnet and the ferromagnetic pole can ensure the formation of a uniform magnetic field in the air gap, reduce magnetic field fluctuations, and improve the stability of the motor operation; the uniformity and strength of the magnetic field help to reduce hysteresis loss and eddy current loss, thereby improving the overall energy efficiency of the motor; the symmetrical layout enables the motor to generate a more stable torque under different loads, reduce torque pulsation, and improve the smoothness of operation; this design can promote smooth airflow, help the thermal management of the motor, reduce the operating temperature, and extend the service life. The matching design of the permanent magnet and the ferromagnetic pole can effectively reduce the lateral force generated during operation and reduce mechanical wear; it can achieve a symmetrical magnetic field distribution to effectively reduce the noise and vibration during the operation of the motor and improve the user experience; it can achieve a stable structure and a uniform magnetic field distribution, thereby reducing the failure rate and improving the reliability and durability of the motor.

[0037] In some embodiments, the excitation winding on the primary side of the excitation adopts a concentrated winding structure, and the excitation direction is consistent with the magnetization direction of the permanent magnet at the end of the excitation tooth. The concentrated winding can generate a strong local magnetic field near the excitation tooth, which is consistent with the magnetization direction of the permanent magnet, which helps to improve the output power and efficiency of the motor. This structure can optimize the magnetic circuit, thereby reducing hysteresis loss and eddy current loss and improving the energy efficiency of the motor. It can also improve the starting performance. This design can provide a greater starting torque, so that the motor performs better at startup, and is suitable for applications that require high starting torque. In addition, the centralized design of the excitation winding enables the control system of the motor to more flexibly adjust the excitation state and improve the dynamic response capability of the motor; the concentrated winding structure helps to distribute heat more evenly, improve the thermal management of the motor, extend the service life, optimize the electromagnetic compatibility, and effectively reduce the interference of the motor to surrounding electronic equipment and improve electromagnetic compatibility.

[0038] In some embodiments, the multi-working magnetic potential hybrid excitation linear motor also includes an assembly bracket, and the segmented modulation block is fixed on the assembly bracket. The assembly bracket includes a non-magnetic aluminum rod, epoxy resin, a modulation block support and an end plate.

[0039] In some embodiments, the end of the excitation tooth includes a first ferromagnetic pole and a second ferromagnetic pole; the width of the first permanent magnet is equal to the width of the first ferromagnetic pole, the width of the second permanent magnet is equal to the width of the second ferromagnetic pole, and the width of the end of the excitation tooth is the sum of the width of the first permanent magnet, the width of the second permanent magnet, the width of the first ferromagnetic pole, and the width of the second ferromagnetic pole;

[0040] Width w of excitation tooth end t 、Permanent magnet pole pitch τ pm and secondary pole distance τs satisfy

[0041] 6*w at =12*τ pm =a*τ s , wherein a is the modulation level; the permanent magnet pole pitch is the pole pitch between the first permanent magnet and the second permanent magnet, and the distance between two adjacent segmented modulation blocks (31) is the secondary pole pitch;

[0042] The distance between the center lines of the same group of excitation teeth is x1=2*τ s ;

[0043] The distance between the center lines of each group of excitation teeth on the same side

[0044] When the total height of the motor remains unchanged, the total height of the armature primary h ap Less than the total height of the excitation primary h fp .

[0045] A multi-working magnetic potential hybrid excitation linear motor proposed according to an embodiment of the present application is described below in conjunction with the accompanying drawings.

[0046] refer to Figure 1 and Figure 2 As shown, an embodiment of the present application provides a multi-working magnetic potential hybrid excitation linear motor, which is a multi-working magnetic potential flux reverse hybrid excitation linear motor, the multi-working magnetic potential hybrid excitation linear motor includes an armature primary side 1, an excitation primary side 2, a secondary side 3 and a double air gap area 4; the secondary side 3 is located between the armature primary side 1 and the excitation primary side 2, forming an upper air gap area 41 and a lower air gap area 42; the armature primary side 1 is provided with an armature winding 11, which is wound on the armature teeth 12; the excitation primary side 2 is also provided with an excitation winding 21 and a permanent magnet array 22, and the excitation winding 21 and the permanent magnet array 22 are arranged on the excitation teeth 23; the secondary side 3 is provided with a segmented modulation block 31; the double air gap area 4 includes an upper air gap area 41 and a lower air gap area 42.

[0047] An armature primary side 1, an excitation primary side 2, and a secondary side 3, wherein the secondary side 3 is located between the armature primary side 1 and the excitation primary side 2, so that the motor forms a double air gap 4; the armature primary side 1 is provided with an armature winding 11, which is wound on the armature teeth 12; the excitation primary side 2 is also provided with an excitation winding 21 and a permanent magnet array 22, and the excitation winding 21 and the permanent magnet array 22 are arranged on the excitation teeth 23; the secondary side 3 is provided with a segmented modulation block 31; the double air gap 4 structure includes a first air gap area 41 and a second air gap area 42.

[0048] In some embodiments, the primary side of the armature of the hybrid excitation linear motor has a total of six armature teeth 12, with each two armature teeth 12 forming a group, for a total of three groups; the armature winding 11 adopts a concentrated winding structure, and the armature winding 11 wound around the armature teeth 12 in the same group is of the same phase.

[0049] In some embodiments, the excitation primary side of the multi-working magnetic potential hybrid excitation linear motor has a total of six excitation teeth 23, with each two excitation teeth 23 forming a group, for a total of three groups; each excitation tooth 23 is aligned with the center line of the corresponding armature tooth 12, and the end width of the excitation tooth 23 is consistent with the end width of the armature tooth 12.

[0050] In some embodiments, the permanent magnet array 22 on the primary side of the excitation is alternately embedded in the ends of the excitation teeth 23, and the permanent magnet array at the ends of each group of excitation teeth is arranged in the following manner: Fe / N / Fe / NN / Fe / N / Fe or Fe / S / Fe / SS / Fe / S / Fe; the permanent magnet width and the ferromagnetic pole width are symmetrically arranged about the center line of the excitation tooth 23, the inner permanent magnet width is consistent with the inner ferromagnetic pole width, and the outer permanent magnet width is consistent with the outer ferromagnetic pole width; the permanent magnet magnetization direction is vertically upward or vertically downward.

[0051] Exemplarily, the excitation primary side excitation winding 21 adopts a concentrated winding structure, and the excitation direction is consistent with the magnetization direction of the permanent magnets at the ends of the excitation teeth.

[0052] For example, reference Figure 3 As shown, a segmented modulation block 31 is provided on the secondary side and fixed on the assembly bracket 5. The assembly bracket 5 includes two non-magnetic aluminum rods 51, two modulation block support members 52 arranged parallel to each other, and two end plates 53 arranged parallel to each other. The same ends of the two modulation block support members 52 in the length direction are connected by a non-magnetic aluminum rod 51 and an end plate 53 respectively; the modulation block 31 is placed between the two modulation block support members 52, and the two sides are fixed and sealed by the non-magnetic aluminum rods 51 and the end plates 53 respectively, and the gap between the assembly bracket 5 and the segmented modulation block 31 is filled with epoxy resin 54. In this way, the segmented modulation block 31 can be firmly fixed.

[0053] Exemplarily, the double air gap region 4 includes two parts: an upper air gap region 41 between the armature primary side 1 and the secondary side 3 , and a lower air gap region 42 between the excitation primary side 2 and the secondary side 3 .

[0054] refer to Figure 2 As shown, in some embodiments, the motor structural parameters of the multi-working magnetic potential hybrid excitation linear motor satisfy the following relationship:

[0055] (1) Permanent magnet width w pm1 、w pm2 , ferromagnetic pole width wFe1 、w Fe2 , and the excitation (armature) tooth end width w t Satisfy: w pm1 =w Fe1 、w pm2 =w Fe2 、w t =w pm1 +w pm2 +w Fe1 +w Fe2 ;

[0056] (2) Width w of the excitation (armature) tooth end t , permanent magnet pole pitch τ pm 、Secondary pole distance τ s satisfy:

[0057] 6*w at =12*τ pm =a*τ s , a is the modulation level;

[0058] (3) The distance x1 between the center lines of the excitation (armature) teeth in the same group satisfies: x1 = 2*τ s ;

[0059] (4) The distance x2 between the center lines of each set of excitation (armature) teeth on the same side satisfies: To ensure that the three phases have a 120° difference in back electromotive force;

[0060] (5) When the total height of the motor remains unchanged, the total height of the armature primary h ap Less than the total height of the primary excitation h fp To ensure that the area of ​​the primary excitation slot can accommodate enough excitation windings, the main magnetic flux can be enhanced or weakened by DC currents of different directions and sizes to flexibly change the output performance of the motor.

[0061] The multi-working magnetic potential hybrid excitation linear motor of the embodiment of the present application is a multi-working magnetic potential flux reverse hybrid excitation linear motor, which adopts a split primary structure and can effectively solve the problems of space limitation and heat dissipation difficulty caused by the armature winding and the excitation winding being arranged on the same side in the hybrid excitation motor of the related technology, and effectively reduce the conflict between the electric load and the magnetic load caused by the armature winding and the permanent magnet on the same side.

[0062] In addition, in the related art, relying on the good performance of rare earth permanent magnet materials, permanent magnet synchronous linear motors can achieve higher energy utilization efficiency, better dynamic performance, and simpler maintenance methods. However, high-performance permanent magnet materials are expensive. For applications in long-travel fields such as transportation, laying a large number of permanent magnets will increase the cost of motor manufacturing and maintenance; and, as a single excitation source, permanent magnets limit the voltage regulation capability and speed regulation range of the motor, and cannot meet the variable working conditions and performance requirements in the field of industrial control. The permanent magnet linear motor of the related art has the risk of irreversible demagnetization of permanent magnets, and there will be spatial conflicts between the armature winding and the excitation winding. In addition, due to the tooth slot structure and edge structure of the linear motor, it will cause large positioning force and thrust fluctuations, resulting in a reduction in the thrust density of the motor. The positioning force can be reduced by adding auxiliary teeth, inclined slots and other structural methods. How to further improve the thrust density of the motor from other aspects needs to be explored urgently. The embodiment of the present application adopts a novel alternating pole structure, using ferromagnetic poles as the electrical excitation path in hybrid excitation, effectively reducing the risk of large-area irreversible demagnetization of permanent magnets; and while reducing the amount of permanent magnets and improving the utilization rate of permanent magnets, by arranging permanent magnets with different widths, additional air gap magnetic field working harmonics are introduced in the double air gap area, thereby realizing multi-air gap magnetic flux density operation, making up for the deficiency of average thrust of the traditional alternating pole structure, and further improving the thrust density of the motor.

[0063] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0064] The above embodiments only express the implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A multi-working magnetic potential hybrid excitation linear motor, characterized in that: It includes an armature primary side, an excitation primary side and a secondary side located between the armature primary side and the excitation primary side; the armature primary side includes a plurality of armature teeth, each of which is wound with an armature winding; the excitation primary side includes a plurality of excitation teeth, each of which is wound with an excitation winding, and each of which is provided with a permanent magnet array; the secondary side includes a plurality of segmented modulation blocks.

2. The multi-working magnetic potential hybrid excitation linear motor according to claim 1, characterized in that: The multi-working magnetic potential hybrid excitation linear motor also includes a double air gap region, which includes an upper air gap region and a lower air gap region. The upper air gap region is located between the primary side of the armature and the secondary side, and the lower air gap region is located between the primary side of the excitation and the secondary side.

3. The multi-working magnetic potential hybrid excitation linear motor according to claim 1, characterized in that: The primary side of the armature includes three armature tooth groups, each of which includes two armature teeth; the armature winding adopts a concentrated winding structure, and the armature windings wound on the armature teeth of the same armature tooth group are of the same phase.

4. The multi-working magnetic potential hybrid excitation linear motor according to any one of claims 1 to 3, characterized in that: The excitation primary side includes three excitation tooth groups, each of which includes two excitation teeth; the center line of each excitation tooth coincides with the center line of the corresponding armature tooth, and the end width of the excitation tooth is consistent with the end width of the corresponding armature tooth.

5. The multi-working magnetic potential hybrid excitation linear motor according to claim 1, characterized in that: The permanent magnet array includes a first permanent magnet and a second permanent magnet, and the permanent magnet array at the end of each group of excitation teeth is arranged in a manner of Fe / N / Fe / NN / Fe / N / Fe or Fe / S / Fe / SS / Fe / S / Fe.

6. The multi-working magnetic potential hybrid excitation linear motor according to claim 5, characterized in that: The width of the permanent magnet and the width of the ferromagnetic pole are symmetrically arranged about the center line of the excitation tooth, the width of the inner permanent magnet is consistent with the width of the inner ferromagnetic pole, and the width of the outer permanent magnet is consistent with the width of the outer ferromagnetic pole; the magnetization direction of the permanent magnet is vertically upward or vertically downward.

7. The multi-working magnetic potential hybrid excitation linear motor according to claim 4, characterized in that: The excitation winding on the primary side of the excitation adopts a concentrated winding structure, and the excitation direction is consistent with the magnetization direction of the permanent magnet at the end of the excitation tooth.

8. The multi-working magnetic potential hybrid excitation linear motor according to claim 1, characterized in that: The multi-working magnetic potential hybrid excitation linear motor also includes an assembly bracket, and the segmented modulation block is fixed on the assembly bracket.

9. The multi-working magnetic potential hybrid excitation linear motor according to claim 8, characterized in that: The assembly bracket includes two non-magnetic aluminum rods, two modulation block supports arranged parallel to each other, and two end plates arranged parallel to each other. The same ends of the two modulation block supports in the length direction are respectively connected by a non-magnetic aluminum rod and an end plate; the modulation block is placed between the two modulation block supports, and the gap between the assembly bracket and the segmented modulation block is filled with epoxy resin.

10. The multi-working magnetic potential hybrid excitation linear motor according to claim 5 or 6, characterized in that: The end of the excitation tooth includes a first ferromagnetic pole and a second ferromagnetic pole; The width of the first permanent magnet is equal to the width of the first ferromagnetic pole, the width of the second permanent magnet is equal to the width of the second ferromagnetic pole, and the width of the end of the excitation tooth is the sum of the width of the first permanent magnet, the width of the second permanent magnet, the width of the first ferromagnetic pole, and the width of the second ferromagnetic pole; Width w of excitation tooth end t 、Permanent magnet pole pitch τ pm and secondary pole distance τ s satisfy 6*w at =12*τ pm =a*τ s , wherein a is the modulation level; the permanent magnet pole pitch is the pole pitch between the first permanent magnet and the second permanent magnet, and the distance between two adjacent segmented modulation blocks (31) is the secondary pole pitch; The distance between the center lines of the same group of excitation teeth is x1=2*τ s ; The distance between the center lines of each group of excitation teeth on the same side When the total height of the motor remains unchanged, the total height of the armature primary h ap Less than the total height of the primary excitation h fp .

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