A rotor structure and method of manufacture for a multiphase magnetic material combination

Abstract

A kind of rotor structure and manufacturing method of multiphase magnetic material combination belong to motor technical field.The present application is in view of the technical bottleneck of single material selection and limited design flexibility of existing motor, proposes a kind of multiphase magnetic material combination scheme based on magnetic field analysis.It includes soft magnetic material component and oriented silicon steel component, according to the magnetic field flow characteristics and stress characteristics of different regions of rotor, flexible application of soft magnetic material, magnetic material, oriented silicon steel sheet and other multiphase magnetic materials in different regions of rotor, targeted improvement is carried out on the electromagnetic and mechanical characteristics of each region of rotor, to improve mechanical strength, weaken leakage phenomenon, reduce motor loss, reduce manufacturing cost and other all-round, multi-objective optimization effect.The present application can stably improve the torque density, power density, efficiency and cost performance of motor, has strong practicability, and is worth promoting.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a rotor structure constructed using multi-phase magnetic materials such as soft magnetic materials, magnetic isolation materials, and oriented silicon steel sheets, and a manufacturing method thereof. Background Art

[0002] In motor design, material selection and application are key factors in determining motor performance. Traditional motor rotor designs often rely on a single soft magnetic material, with silicon steel being the most common. However, with the continuous expansion of motor applications and rising performance standards, a single material is no longer sufficient to meet diverse design requirements.

[0003] In current engineering applications, silicon steel materials are primarily divided into two categories: isotropic, non-oriented silicon steel, whose magnetic permeability is essentially uniform in all directions; and preferentially oriented silicon steel, which exhibits high permeability and saturation magnetic induction along the rolling direction, but exhibits significant performance degradation in the non-rolling direction. Because the magnetic field direction dynamically changes during motor operation, using uniformly oriented silicon steel throughout the core can lead to mismatches between the magnetic field flow direction and the rolling direction of the material in some areas, resulting in unfavorable consequences such as permeability fluctuations and reduced magnetic field utilization. Therefore, to ensure stable magnetic field conduction, current motor designs generally use non-oriented silicon steel.

[0004] Furthermore, the rotor structure design of a permanent magnet motor not only considers the electromagnetic performance of the rotor, but also the centrifugal stress caused by high speed and the heat generated by rotor losses. This places high demands on the mechanical strength and loss characteristics of the core material. Currently, various soft magnetic materials used to manufacture rotor cores have their own characteristics in terms of magnetic conductivity, loss characteristics, mechanical strength, and cost. However, no single soft magnetic material has yet emerged that combines excellent electromagnetic performance, high mechanical strength, and low cost to meet the universal requirements of all rotor designs.

[0005] Therefore, there is an urgent need to develop a rotor structure and its design and manufacturing method that integrates multi-phase magnetic materials such as soft magnetic materials, magnetic isolation materials, and oriented silicon steel sheets. By accurately analyzing the magnetic field characteristics of different regions of the rotor and matching them with suitable materials, all-round and multi-objective performance optimization of the motor can be achieved to fill the gaps in existing technologies and promote the further development of motor technology. Summary of the Invention

[0006] The purpose of the present invention is to provide a rotor structure and manufacturing method using multi-phase magnetic materials to solve the problem of the single material selection problem in existing motors. The technical solutions adopted by the present invention are as follows:

[0007] A rotor structure using multi-phase magnetic materials, wherein the rotor is composed of a plurality of rotor laminations stacked in sequence, wherein the rotor laminations include a rotor yoke located in the center and a positive and even number of magnetic pole core units arranged on the outer periphery of the rotor yoke, the rotor yoke is annular, and a first magnetic slot is formed between the rotor yoke and the positive and even number of magnetic pole core units, and any two adjacent magnetic pole core units are separated by an interpole piece, and the interpole piece includes an inner magnetic isolation bridge, a magnetic web and an outer magnetic isolation bridge arranged in sequence from the inside to the outside along the radial direction of the rotor lamination, and the magnetic web is adjacent to the magnetic pole core units on both sides. Second magnet slots are formed between the elements, the inner sides of several inner magnetic isolation bridges are in contact with the rotor yoke, the rotor yoke is a soft magnetic material component, the pole core unit is an oriented silicon steel material component, the oriented silicon steel sheets constituting the pole core unit are rolled along the radial direction of the rotor lamination, the outer magnetic isolation bridge and the inner magnetic isolation bridge are magnetic isolation material components, the magnetic conductive web is a soft magnetic material component, the rotor yoke, several inner magnetic isolation bridges, the magnetic conductive web, several outer magnetic isolation bridges and several pole core units are spliced ​​to form an annular rotor lamination, a first permanent magnet is provided in the first magnet slot, and a second permanent magnet is provided in the second magnet slot.

[0008] Furthermore, the outer magnetic isolation bridge and the inner magnetic isolation bridge are components made of stainless steel or titanium alloy.

[0009] Furthermore, the magnetic conductive web is a component made of silicon steel material.

[0010] The present invention also provides a method for manufacturing a rotor using multi-phase magnetic materials, which is based on the above-mentioned rotor structure using multi-phase magnetic materials and includes the following steps:

[0011] Step 1: Prepare soft magnetic material, magnetic isolation material and oriented silicon steel material sheets of uniform thickness, and use the soft magnetic material sheets to process the rotor yoke and several magnetic conductive webs by punching or cutting, use the magnetic isolation material sheets to process several outer magnetic isolation bridges and inner magnetic isolation bridges, and use the oriented silicon steel material sheets to process several pole core units;

[0012] Step 2: Arrange the processed rotor yoke, several magnetic webs, several outer magnetic isolation bridges, several pole core units and several inner magnetic isolation bridges according to the component positions, and weld them together in sequence to form a complete rotor lamination;

[0013] Step 3: Align and stack a number of rotor laminations in sequence along the axial direction, arrange a first permanent magnet in the first magnet slot, and arrange a second permanent magnet in the second magnet slot to form a complete rotor structure.

[0014] The present invention provides a second built-in permanent magnet rotor structure based on multi-phase magnetic materials, wherein the rotor is composed of a plurality of rotor laminations stacked in sequence, wherein the rotor laminations include a rotor yoke located in the center and a positive and even number of magnetic pole core units arranged on the outer periphery of the rotor yoke, the rotor yoke is annular, and a first magnet slot is formed between the rotor yoke and the positive and even number of magnetic pole core units, and any two adjacent magnetic pole core units are separated by an interpole piece, the interpole piece includes a magnetic conductive web, the inner end of the magnetic conductive web is provided with a dovetail protrusion, the outer periphery of the rotor yoke is provided with a dovetail slot between any two adjacent first magnet slots, a plurality of dovetail protrusions are adapted and engaged with a plurality of dovetail slots in a one-to-one correspondence, an umbrella-shaped protrusion is provided on the outer end of the magnetic conductive web, and chamfered notches are provided at both ends of the outer periphery of the magnetic pole core unit. The umbrella-shaped protrusions are respectively adapted and engaged with the chamfered notches of the adjacent pole core units on both sides, and a second magnet slot is respectively provided between the magnetic web and the adjacent pole core units on both sides. The rotor yoke is a soft magnetic material component, and the pole core unit is an oriented silicon steel material component. The oriented silicon steel sheets constituting the pole core unit are rolled in the radial direction, and the magnetic web is a soft magnetic material component. The rotor yoke and several pole core units are snap-fitted and spliced ​​together through several magnetic webs to form an annular rotor lamination. A first permanent magnet is provided in the first magnet slot, and a second permanent magnet is provided in the second magnet slot. A magnetic isolation gap is formed between one end of the second permanent magnet and the corresponding umbrella-shaped protrusion, and a magnetic isolation gap is formed between the other end of the second permanent magnet and the adjacent first permanent magnet. The magnetic web and the magnetic isolation gaps at both ends constitute an interpole member.

[0015] The present invention provides a second method for manufacturing a rotor structure using multi-phase magnetic materials, which is based on the above-mentioned second rotor structure using multi-phase magnetic materials and includes the following steps:

[0016] Step 1: Prepare sheets of soft magnetic material and oriented silicon steel material of uniform thickness, and process the rotor yoke and several magnetic webs with the soft magnetic material, and process several pole core units with the oriented silicon steel material by punching or cutting.

[0017] Step 2: First, the processed rotor yoke, several magnetic webs and several pole core units are clamped in sequence according to the component positions to form a complete rotor lamination, and then the several rotor laminations are aligned and stacked in sequence along the axial direction, with a first permanent magnet provided in the first magnet slot and a second permanent magnet provided in the second magnet slot to form a complete rotor structure; or first, several rotor yokes are aligned and stacked in sequence to form a rotor yoke module, and several magnetic webs are aligned and stacked in sequence to form several magnetic web modules, and several pole core units are aligned and stacked in sequence to form several pole core modules, and then the rotor yoke module, several magnetic web modules and several pole core modules are clamped in sequence according to the component positions to form a complete rotor structure, with a first permanent magnet provided in the first magnet slot and a second permanent magnet provided in the second magnet slot.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By flexibly applying multi-phase magnetic materials such as soft magnetic materials, magnetic isolation materials, and oriented silicon steel sheets in different areas of the rotor, and optimizing their layout based on the magnetic field flow characteristics of different rotor areas, specific problems in different areas of the rotor can be effectively solved. For example, applying high-mechanical-strength magnetic isolation materials to the rotor magnetic bridge area, where magnetic leakage is large and stress is concentrated, not only improves the mechanical strength of the rotor but also enhances the magnetic field utilization rate. Applying oriented silicon steel materials with high magnetic permeability and low loss characteristics to the rotor pole core area, where the magnetic field flows radially, improves the magnetic field utilization rate to a limited extent and reduces rotor core losses. Applying affordable, low-performance soft magnetic materials to the stator and rotor yoke areas, where magnetic field changes are relatively stable, has little adverse effect on motor performance, but can effectively reduce material costs. This design enables the motor to achieve optimized performance under different operating conditions, enhancing the rotor's design flexibility and manufacturing economy.

[0020] 2. Dividing the rotor into multiple small areas and using different materials creates a structure that is essentially a mosaic of several small pieces. This approach offers significant advantages over traditional large-block material processing, providing greater flexibility during processing and effectively reducing loss and waste caused by material size mismatches. This effectively improves material utilization, conserves resources, reduces manufacturing costs, and enhances product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of an internal permanent magnet rotor based on multi-phase magnetic materials in Example 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the processing flow of the built-in permanent magnet rotor based on multi-phase magnetic materials according to Example 2;

[0023] Figure 3 This is a schematic structural diagram of an internal permanent magnet rotor based on multi-phase magnetic materials using a splicing molding method in Example 3;

[0024] Figure 4 This is a schematic diagram of the processing flow of the built-in permanent magnet rotor based on multi-phase magnetic materials using a splicing molding method in Example 4.

[0025] In the figure, 1. pole core unit, 2. second magnet slot, 3. magnetic conductive web, 4. outer magnetic isolation bridge, 5. inner magnetic isolation bridge, 6. first magnet slot, 7. rotor yoke, 8. second permanent magnet, 9. first permanent magnet, 10. rotor lamination. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0027] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as bolt connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a bolted connection is selected for a detachable connection.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are provided to explain the present invention, but the present invention is not limited to the following embodiments.

[0029] Example 1:

[0030] Reference Figure 1 and Figure 2 , a rotor structure using multi-phase magnetic materials, especially a built-in "U-shaped", "straight-shaped", "V-shaped" topological permanent magnet rotor structure using multi-phase magnetic materials such as soft magnetic materials, magnetic isolation materials, and oriented silicon steel sheets:

[0031] The rotor is composed of a number of rotor laminations 10 stacked in sequence, and the rotor laminations 10 include a rotor yoke 7 located in the center and a positive even number of pole core units 1 arranged on the outer periphery of the rotor yoke 7. The rotor yoke 7 is annular, and a first magnetic slot 6 is formed between the rotor yoke 7 and the positive even number of pole core units 1. Any two adjacent pole core units 1 are separated by an interpole piece, and the interpole piece includes an inner magnetic isolation bridge 5, a magnetic web 3 and an outer magnetic isolation bridge 4 which are arranged in sequence from the inside to the outside along the radial direction of the rotor lamination 10. A second magnetic slot 2 is formed between the magnetic web 3 and the adjacent pole core units 1 on both sides. The inner sides of several inner magnetic isolation bridges 5 are in contact with the rotor yoke 7, and several inner magnetic isolation bridges 5 are in contact with the adjacent pole core units 1 on both sides. The adjacent pole core units 1 are abutted to separate the adjacent first magnet slots 6 and second magnet slots 2. The rotor yoke 7 is a cost-effective soft magnetic material component. The pole core unit 1 is an oriented silicon steel material component. The oriented silicon steel sheets constituting the pole core unit 1 are rolled along the radial direction of the rotor lamination 10. The outer magnetic isolation bridge 4 and the inner magnetic isolation bridge 5 are magnetic isolation material components with high mechanical strength and low magnetic permeability. The magnetic conductive web 3 is a soft magnetic material component with high mechanical strength. The rotor yoke 7, several inner magnetic isolation bridges 5, magnetic conductive webs 3, several outer magnetic isolation bridges 4 and several pole core units 1 are spliced ​​to form an annular rotor lamination 10. A first permanent magnet 9 is provided in the first magnet slot 6, and a second permanent magnet 8 is provided in the second magnet slot 2.

[0032] The outer sides of the plurality of magnetic pole core units 1 and the plurality of external magnetic isolation bridges 4 are all arc-shaped. The plurality of magnetic pole core units 1 and the plurality of external magnetic isolation bridges 4 are sequentially connected and spaced apart to form a circular outer contour of the rotor lamination 10. The plurality of magnetic pole core units 1 form the rotor magnetic pole core.

[0033] The main function of the pole core unit 1 is to guide the magnetic field of the first permanent magnet 9 and the second permanent magnet 8 into the air gap in the radial direction; the outer magnetic isolation bridge 4 is in the shape of a narrow strip, and the two ends of the outer magnetic isolation bridge 4 are connected to the two adjacent pole core units 1. The inner side of the outer magnetic isolation bridge 4 is connected to the magnetic conductive web 3. The outer magnetic isolation bridge 4 has two main functions: one is to isolate the magnetic path between the poles and reduce magnetic leakage; the other is to tighten the pole core unit 1 and the second permanent magnet 8 to prevent the occurrence of component detachment and damage accidents under the action of centrifugal force; the magnetic conductive bridge 4 is connected to the inner side of the magnetic isolation bridge 4. The web 3 is in the shape of a long strip. The magnetic web 3 has two main functions: one is to guide the flow of the magnetic field of the two second permanent magnets 8, and the other is to transmit the radial tension exerted on the outer magnetic isolation bridge 4; the inner magnetic isolation bridge 5 connects the magnetic web 3 and the rotor yoke 7, and is in the shape of a narrow strip. The inner magnetic isolation bridge 5 has two main functions: one is to isolate the magnetic path between the magnetic poles and reduce magnetic leakage, and the other is to withstand the tension conducted by the magnetic web 3 to achieve the purpose of tightening the rotor structure; the rotor yoke 7 is annular, and its main function is to gather magnetic lines of force to form a closed magnetic circuit.

[0034] Materials are selected based on the electromagnetic and mechanical properties of different rotor regions, effectively solving specific problems in different rotor regions. The pole core unit 1 is made of oriented silicon steel, and its magnetic field flows primarily radially, exhibiting significant directionality. The outer and inner magnetic isolation bridges 4 and 5 are located in areas with severe magnetic leakage and mechanical stress concentration. Using low-permeability, high-mechanical-strength stainless steel or titanium alloy materials to process the outer and inner magnetic isolation bridges 4 and 5 effectively solves these problems. The magnetic web 3 not only performs magnetic conduction but also withstands radial mechanical stress. High-mechanical-strength silicon steel is used to process the magnetic web 3. The rotor yoke 7 has a larger area and uses more material, resulting in a more stable magnetic field. Using cost-effective silicon steel to process the rotor yoke 7 reduces material costs without significantly impacting motor performance.

[0035] The outer magnetic isolation bridge 4 and the inner magnetic isolation bridge 5 are preferably made of stainless steel or titanium alloy.

[0036] The magnetic conductive web 3 is preferably made of silicon steel.

[0037] Example 2:

[0038] Reference Figure 1 and Figure 2 A method for manufacturing a rotor using multi-phase magnetic materials is implemented based on the rotor structure using multi-phase magnetic materials described in Example 1, comprising the following steps:

[0039] Step 1: Prepare soft magnetic material, magnetic isolation material and oriented silicon steel material sheets of uniform thickness required for processing the rotor laminations 10. Use the soft magnetic material sheets to process the rotor yoke 7 and several magnetic conductive webs 3 by punching or cutting. Use the magnetic isolation material sheets to process several outer magnetic isolation bridges 4 and inner magnetic isolation bridges 5. Use the oriented silicon steel material sheets to process several pole core units 1.

[0040] Step 2: Arrange the processed rotor yoke 7, the plurality of magnetic conductive webs 3, the plurality of outer magnetic isolation bridges 4, the plurality of pole core units 1 and the plurality of inner magnetic isolation bridges 5 according to the component positions and weld them together in sequence to form a complete rotor lamination 10;

[0041] Step 3: Align and stack several rotor laminations 10 in sequence along the axial direction, arrange the first permanent magnet 9 in the first magnet slot 6, and arrange the second permanent magnet 8 in the second magnet slot 2 to form a complete rotor structure.

[0042] Example 3:

[0043] Reference Figure 3 and Figure 4, a rotor structure using multi-phase magnetic materials, the rotor is composed of a plurality of rotor laminations 10 stacked in sequence, the rotor laminations 10 including a rotor yoke 7 in the center and a positive and even number of magnetic pole core units 1 arranged on the outer periphery of the rotor yoke 7, the rotor yoke 7 is annular, and a first magnet slot 6 is formed between the rotor yoke 7 and the positive and even number of magnetic pole core units 1, and any two adjacent magnetic pole core units 1 are separated by an interpole piece, the interpole piece includes a magnetic conductive web 3, the inner end of the magnetic conductive web 3 is provided with a dovetail protrusion, the outer periphery of the rotor yoke 7 is provided with a dovetail slot between any two adjacent first magnet slots 6, a plurality of dovetail protrusions are adapted and engaged with a plurality of dovetail slots in a one-to-one correspondence, an umbrella-shaped protrusion is provided at the outer end of the magnetic conductive web 3, and chamfered notches are provided at both ends of the outer periphery of the magnetic pole core unit 1, and the umbrella-shaped protrusions are respectively connected to the two sides. The chamfered notches of the adjacent pole core units 1 are adapted and snap-fitted, and a second magnet slot 2 is respectively provided between the magnetic web 3 and the adjacent pole core units 1 on both sides. The rotor yoke 7 is a cost-effective soft magnetic material component, and the pole core unit 1 is an oriented silicon steel material component. The oriented silicon steel sheets constituting the pole core unit 1 are rolled in the radial direction. The magnetic web 3 is a soft magnetic material component with high mechanical strength. The rotor yoke 7 and several pole core units 1 are snap-fitted and spliced ​​together through several magnetic webs 3 to form an annular rotor lamination 10. A first permanent magnet 9 is provided in the first magnet slot 6, and a second permanent magnet 8 is provided in the second magnet slot 2. A magnetic isolation gap is formed between one end of the second permanent magnet 8 and the corresponding umbrella-shaped protrusion, and a magnetic isolation gap is formed between the other end of the second permanent magnet 8 and the adjacent first permanent magnet 9. The magnetic web 3 and the magnetic isolation gaps at both ends constitute an interpole member.

[0044] The outer ends of several of the pole shoe structures are connected to the outer ends of several pole core units 1 in sequence at intervals to form a circular outer contour of the rotor lamination 10. Compared with the rotor structure described in Example 1, the rotor structure in this embodiment adopts a clamping method to connect the rotor yoke 7 and several pole core units 1 through the magnetic web 3, avoiding the welding step and greatly reducing the processing difficulty.

[0045] Example 4:

[0046] Reference Figure 3 and Figure 4 A method for manufacturing a rotor structure using multi-phase magnetic materials is implemented based on the rotor structure using multi-phase magnetic materials described in Example 3, comprising the following steps:

[0047] Step 1: Prepare soft magnetic material and oriented silicon steel material sheets of uniform thickness required for processing the rotor laminations 10. Use the soft magnetic material to process the rotor yoke 7 and several magnetic webs 3, and use the oriented silicon steel material to process several pole core units 1 by punching or cutting.

[0048] Step 2: First, the processed rotor yoke 7, several magnetic webs 3 and several pole core units 1 are clamped in sequence according to the component positions to form a complete rotor lamination 10, and then several rotor laminations 10 are aligned and stacked in sequence along the axial direction, with a first permanent magnet 9 provided in the first magnet slot 6 and a second permanent magnet 8 provided in the second magnet slot 2 to form a complete rotor structure; or first, several rotor yokes 7 are aligned and stacked in sequence to form a rotor yoke 7 module, several magnetic webs 3 are aligned and stacked in sequence to form several magnetic web 3 modules, several pole core units 1 are aligned and stacked in sequence to form several pole core modules, and then the rotor yoke 7 module, several magnetic web 3 modules and several pole core modules are clamped in sequence according to the component positions to form a complete rotor structure, with a first permanent magnet 9 provided in the first magnet slot 6 and a second permanent magnet 8 provided in the second magnet slot 2.

[0049] The advantage of this invention lies in its ability to optimize specific rotor regions by applying different types of materials to them through in-depth analysis of magnetic field variations and force characteristics in different rotor regions. This optimization approach is highly beneficial for improving motor efficiency, power density, and reliability, and holds great potential for widespread application.

[0050] 1. By flexibly applying multi-phase magnetic materials such as soft magnetic materials, magnetic isolation materials, and oriented silicon steel sheets in different areas of the rotor, and optimizing their layout based on the magnetic field flow characteristics of different rotor areas, specific problems in different areas of the rotor can be effectively solved. For example, applying high-mechanical-strength magnetic isolation materials to the rotor magnetic bridge area, where magnetic leakage is large and stress is concentrated, not only improves the mechanical strength of the rotor but also enhances the magnetic field utilization rate. Applying oriented silicon steel materials with high magnetic permeability and low loss characteristics to the rotor pole core area, where the magnetic field flows radially, improves the magnetic field utilization rate to a limited extent and reduces rotor core losses. Applying affordable, low-performance soft magnetic materials to the stator and rotor yoke areas, where magnetic field changes are relatively stable, has little adverse effect on motor performance, but can effectively reduce material costs. This design enables the motor to achieve optimized performance under different operating conditions, enhancing the rotor's design flexibility and manufacturing economy.

[0051] 2. Dividing the rotor into multiple small areas and using different materials creates a structure that is essentially a mosaic of several small pieces. This approach offers significant advantages over traditional large-block material processing, providing greater flexibility during processing and effectively reducing loss and waste caused by material size mismatches. This effectively improves material utilization, conserves resources, reduces manufacturing costs, and enhances product competitiveness.

[0052] The above embodiments are merely illustrative of the present invention and do not limit its scope of protection. Those skilled in the art may make partial changes thereto, which are within the scope of protection of the present invention as long as they do not exceed the spirit of the present invention.

Claims

1. A rotor structure using multi-phase magnetic materials, characterized by: The rotor is composed of a plurality of rotor laminations (10) stacked in sequence. The rotor laminations (10) include a rotor yoke (7) located in the center and a positive and even number of magnetic pole core units (1) arranged on the outer periphery of the rotor yoke (7). The rotor yoke (7) is annular. First magnetic slots (6) are formed between the rotor yoke (7) and the positive and even number of magnetic pole core units (1). Any two adjacent magnetic pole core units (1) are separated by an interpole piece. The interpole piece includes an inner magnetic isolation bridge (5), a magnetic conductive web (3) and an outer magnetic isolation bridge (4) arranged in sequence from the inside to the outside along the radial direction of the rotor lamination (10). Second magnetic slots ( 2), the inner sides of a plurality of inner magnetic isolation bridges (5) are in contact with the rotor yoke (7), the rotor yoke (7) is a soft magnetic material component, the magnetic pole core unit (1) is an oriented silicon steel material component, the oriented silicon steel sheets constituting the magnetic pole core unit (1) are rolled along the radial direction of the rotor lamination (10), the outer magnetic isolation bridge (4) and the inner magnetic isolation bridge (5) are magnetic isolation material components, the magnetic conductive web (3) is a soft magnetic material component, the rotor yoke (7), the plurality of inner magnetic isolation bridges (5), the magnetic conductive web (3), the plurality of outer magnetic isolation bridges (4) and the plurality of magnetic pole core units (1) are spliced ​​to form an annular rotor lamination (10), the first permanent magnet (9) is provided in the first magnet slot (6), and the second permanent magnet (8) is provided in the second magnet slot (2).

2. The rotor structure using multi-phase magnetic materials according to claim 1, characterized in that: The outer magnetic isolation bridge (4) and the inner magnetic isolation bridge (5) are components made of stainless steel or titanium alloy.

3. The rotor structure using multi-phase magnetic materials according to claim 1, characterized in that: The magnetic conductive web (3) is a component made of silicon steel.

4. A method for manufacturing a rotor using multi-phase magnetic materials, which is realized by using a rotor structure using multi-phase magnetic materials according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Prepare soft magnetic material, magnetic isolation material and oriented silicon steel material sheets of uniform thickness, and use the soft magnetic material sheets to process the rotor yoke (7) and a plurality of magnetic conductive webs (3) by punching or cutting, use the magnetic isolation material sheets to process a plurality of outer magnetic isolation bridges (4) and inner magnetic isolation bridges (5), and use the oriented silicon steel material sheets to process a plurality of magnetic pole core units (1); Step 2: Arrange the processed rotor yoke (7), the plurality of magnetic conductive webs (3), the plurality of outer magnetic isolation bridges (4), the plurality of pole core units (1), and the plurality of inner magnetic isolation bridges (5) according to the component positions, and weld them together in sequence to form a complete rotor lamination (10); Step 3: Align and stack a plurality of rotor laminations (10) in sequence along the axial direction, arrange a first permanent magnet (9) in the first magnet slot (6), and arrange a second permanent magnet (8) in the second magnet slot (2), to form a complete rotor structure.

5. A rotor structure using multi-phase magnetic materials, characterized in that: The rotor is composed of a plurality of rotor laminations (10) stacked in sequence, the rotor laminations (10) including a rotor yoke (7) located in the center and a positive and even number of magnetic pole core units (1) arranged on the outer periphery of the rotor yoke (7), the rotor yoke (7) is annular, a first magnetic slot (6) is formed between the rotor yoke (7) and the positive and even number of magnetic pole core units (1), any two adjacent magnetic pole core units (1) are separated by an interpole piece, the interpole piece includes a magnetic web (3), the inner end of the magnetic web (3) is provided with a dovetail protrusion, the outer periphery of the rotor yoke (7) is provided with a dovetail slot between any two adjacent first magnetic slots (6), the dovetail protrusions are adapted and engaged with the dovetail slots in a one-to-one correspondence, the outer end of the magnetic web (3) is provided with an umbrella-shaped protrusion, the outer ends of the magnetic pole core units (1) are respectively provided with chamfered notches, the umbrella-shaped protrusions are respectively connected to the magnetic pole core units adjacent to both sides The chamfered notch of the element (1) is adapted for snap connection, and a second magnet slot (2) is respectively provided between the magnetic web (3) and the adjacent pole core units (1) on both sides. The rotor yoke (7) is a soft magnetic material component, and the pole core unit (1) is an oriented silicon steel material component. The oriented silicon steel sheets constituting the pole core unit (1) are rolled in the radial direction. The magnetic web (3) is a soft magnetic material component. The rotor yoke (7) and a plurality of pole core units (1) are snap-fitted and spliced ​​together through a plurality of magnetic webs (3) to form an annular rotor lamination (10). A first permanent magnet (9) is provided in the first magnet slot (6), and a second permanent magnet (8) is provided in the second magnet slot (2). A magnetic isolation gap is formed between one end of the second permanent magnet (8) and the corresponding umbrella-shaped protrusion, and a magnetic isolation gap is formed between the other end of the second permanent magnet (8) and the adjacent first permanent magnet (9). The magnetic web (3) and the magnetic isolation gaps at both ends constitute an interpole member.

6. A method for manufacturing a rotor structure using multi-phase magnetic materials, which is realized by using the rotor structure using multi-phase magnetic materials according to claim 5, characterized in that: The following steps are involved: Step 1: Prepare soft magnetic material and oriented silicon steel material sheets of uniform thickness, and process the rotor yoke (7) and a plurality of magnetic webs (3) with the soft magnetic material, and process a plurality of magnetic pole core units (1) with the oriented silicon steel material by punching or cutting. Step 2: First, the processed rotor yoke (7), a plurality of magnetic webs (3) and a plurality of pole core units (1) are sequentially clamped according to the component positions to form a complete rotor lamination (10), and then the plurality of rotor laminations (10) are sequentially aligned and laminated along the axial direction, a first permanent magnet (9) is provided in the first magnet slot (6), and a second permanent magnet (8) is provided in the second magnet slot (2) to form a complete rotor structure; or first, a plurality of rotor yokes (7) are sequentially aligned and laminated to form a rotor yoke (7) module, a plurality of magnetic webs (3) are sequentially aligned and laminated to form a plurality of magnetic web (3) modules, a plurality of pole core units (1) are sequentially aligned and laminated to form a plurality of pole core modules, and then the rotor yoke (7) module, a plurality of magnetic web (3) modules and a plurality of pole core modules are sequentially clamped according to the component positions to form a complete rotor structure, a first permanent magnet (9) is provided in the first magnet slot (6), and a second permanent magnet (8) is provided in the second magnet slot (2).

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