Rotor structure of biphase magnetic material embedded motor, preparation method and assembly method

Abstract

The invention discloses a rotor structure of a biphase magnetic material embedded motor, a preparation method and an assembly method, and belongs to the field of motor design. The rotor structure comprises a magnetic conductive block, a magnetic barrier structure and a sleeve structure, the magnetic conductive block is of a segmented structure; the sleeve structure is made of a biphase magnetic material, comprises an outer sheath arranged on the outer side of the rotor and an embedded support body embedded into a rotor pole center shaft, and is connected with the outer sheath; the sleeve structure is T-shaped under the single pole; the contact area of the sleeve structure and the magnetic barrier structure is set as a non-magnetic phase, and the rest area is set as a magnetic phase. The problem of mutual restriction of high strength and low flux leakage requirements in motor rotor design is solved, the peak rotating speed and torque output capability of the motor are improved, and the power density of the motor is improved.

Description

Technical Field

[0001] This invention belongs to the field of motor design, and more specifically, relates to the rotor structure, preparation method and assembly method of a two-phase magnetic material embedded motor. Background Technology

[0002] With the advancement of dual-carbon goals and the development of transportation electrification, high-power-density motors have received increasing attention and show great promise for applications in electric vehicles, ships, aerospace, and other fields. Against this backdrop, lightweighting, high speed, and high power density have become important directions for motor development in order to save energy. At the same time, as motor speeds increase, rotor reliability also faces challenges.

[0003] Among the many types of motors, synchronous reluctance motors have received widespread attention due to their low cost, but they suffer from severe magnetic leakage in the rotor bridge and face challenges in mechanical strength. Built-in permanent magnet motors and permanent magnet-assisted synchronous reluctance motors have higher torque density, but they also face the same problems of mechanical strength and magnetic leakage in the bridge.

[0004] Previous studies have shown that reducing magnetic bridge leakage flux often involves decreasing the thickness of the magnetic bridge to accelerate saturation. However, an excessively thin magnetic bridge can lead to a decrease in rotor mechanical strength. To improve rotor mechanical strength, high-strength silicon steel or rotor sleeves are commonly used. For high-strength silicon steel, the mechanical and electromagnetic properties are generally mutually restrictive; a high yield strength inevitably results in some loss of electromagnetic properties, and magnetic bridge leakage flux in the motor rotor remains constant and constitutes a significant proportion. Rotor sleeves are generally made of non-magnetic alloy steel or carbon fiber, which presents issues such as eddy current losses and heat dissipation. Patent CN119561287A discloses a two-phase material rotor sleeve prepared by welding, which is beneficial for improving motor output and heat dissipation. However, it is essentially made of two welded materials, which may pose certain safety concerns in practical applications. Overall, a suitable structure has not yet been developed to resolve the contradiction between motor mechanical strength and magnetic bridge leakage flux. Summary of the Invention

[0005] In view of the shortcomings of related technologies, the purpose of this invention is to provide a rotor structure, preparation method and assembly method of a two-phase magnetic material embedded motor, which aims to solve the problem of the contradiction between the requirements of high mechanical strength and low leakage flux of the rotor.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a rotor structure for a two-phase magnetic material embedded motor, comprising: a magnetic guide block, a magnetic barrier structure, and a sleeve structure; The magnetically conductive block has a segmented structure; The sleeve structure uses a two-phase magnetic material. The sleeve structure includes an outer sheath and an embedded support. The outer sheath is a cylindrical structure set on the outside of the rotor. The embedded support is a plate-shaped structure embedded in the central shaft of each rotor pole. The embedded support is connected to the outer sheath. The sleeve structure is T-shaped in single pole configuration. The area where the sleeve structure contacts the magnetic barrier structure is set as a non-magnetic phase, and the remaining area is set as a magnetic phase.

[0007] Optionally, the sleeve structure is provided with a protruding structure; the segmented magnetic blocks are provided with groove structures that match the protruding structure.

[0008] Optionally, the interface between the magnetically conductive phase and the non-magnetically conductive phase is a plane or a curved surface.

[0009] Optionally, the motor is a reluctance motor or a permanent magnet motor.

[0010] Optionally, when the motor is a permanent magnet motor, it also includes a permanent magnet; the permanent magnet is made of hard magnetic material, and the permanent magnet is inserted into a predetermined position in the magnetic barrier structure.

[0011] Optionally, the magnetic barrier structure can be in the form of a straight line, a U-shape, a V-shape, a V+1 shape, an arc shape, or a streamlined shape.

[0012] In a second aspect, the present invention also provides a method for preparing a two-phase magnetic material, used to prepare the two-phase magnetic material used in the sleeve structure of the rotor structure of a two-phase magnetic material embedded motor as described in any one of the first aspects, comprising: S1. A nitrogen-blocking coating of a predetermined thickness is applied to a pre-defined magnetically conductive phase region on a ferrite soft magnetic substrate to form a coating coverage area; the ferrite soft magnetic substrate is subjected to nitriding and heat treatment to obtain a two-phase magnetic material; wherein, during the nitriding process, no nitrogen gas penetrates into the coating coverage area, maintaining the magnetically conductive properties, while nitrogen gas penetrates into the uncoated area, causing a phase transformation from a magnetically conductive ferrite structure to a paramagnetic austenite structure; S2. After sandblasting to remove the coating and heat treatment, the target two-phase magnetic material stack is obtained.

[0013] Optionally, during the coating process, the amount of nitriding during the nitriding process can be controlled by setting nitriding coatings of different preset thicknesses, thereby controlling the degree of magnetic permeability transformation of the two-phase magnetic material.

[0014] Thirdly, the present invention also provides a rotor assembly method for a two-phase magnetic material embedded motor, comprising: The two-phase magnetic material stacks prepared by the preparation method described in the second aspect are stacked to form a sleeve. Segmented magnetic conductive blocks are formed by laminating soft magnetic material sheets; When the two-phase magnetic material embedded motor is a reluctance motor, the magnetic guide block is inserted axially into the set position of the two-phase magnetic material sleeve; when the two-phase magnetic material embedded motor is a permanent magnet motor, the magnetic guide block is inserted axially into the set position of the two-phase magnetic material sleeve, and the permanent magnet is inserted into the set position of the magnetic barrier structure; thus obtaining the rotor structure of the two-phase magnetic material embedded motor.

[0015] Compared with the prior art, the above-described technical solutions conceived in this invention can achieve the following beneficial effects: 1. This invention provides a rotor structure for a dual-phase magnetic material embedded motor. It uses a dual-phase magnetic material as the rotor sleeve. By rationally setting the positions of the non-magnetic phases and the interface between the magnetic and non-magnetic phases within the sleeve, leakage flux at the rotor magnetic bridge is effectively reduced. Other areas are designated as magnetic phases, without affecting the original magnetic path of the rotor, further improving the motor's salient pole ratio. Due to the dual-phase magnetic material structure, the yield strength of the non-magnetic phase is higher than that of general soft magnetic materials. Through the sleeve structure and the arrangement of the non-magnetic phases, the multi-layer magnetic barrier structure of the rotor can be effectively supported, which is beneficial to improving the rotor's mechanical strength. This solves the contradiction between magnetic bridge leakage flux and mechanical strength in traditional permanent magnet / resistance motors, thereby increasing the motor's output torque and maximum speed, and improving the motor's power density.

[0016] 2. This invention provides a rotor structure for a dual-phase magnetic material embedded motor. The sleeve structure is formed by lamination. During the manufacturing process, magnetic and non-magnetic phases are formed by coating and nitriding in the target area. The degree of magnetic permeability transformation of the dual-phase magnetic material is controlled by controlling the amount of nitriding during the nitriding process. In addition, the conventional soft magnetic material laminations used in the multi-segment structure of the rotor core are smaller slices, which can reduce material waste and save manufacturing costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a 1 / 4 structure of the rotor topology of a two-pole, three-layer magnetic barrier two-phase magnetic material embedded reluctance motor provided in the embodiments of this application; Figure 2 This is a schematic diagram of the dual-phase magnetic material sheath structure of the rotor of the 2-pole 3-layer magnetic barrier dual-phase magnetic material embedded reluctance motor provided in the embodiments of this application; Figure 3 This is a schematic diagram of the segmented magnetic block structure of the rotor of a two-pole, three-layer magnetic barrier, two-phase magnetic material embedded reluctance motor provided in this application embodiment; Figure 4 This is a schematic diagram of the rotor topology of a 4-pole, 3-layer magnetic barrier, two-phase magnetic material embedded permanent magnet assisted synchronous reluctance motor provided in the embodiments of this application (1 / 8). Figure 5This is a schematic diagram of the rotor topology of a 4-pole, 3-layer magnetic barrier, two-phase magnetic material embedded permanent magnet assisted synchronous reluctance motor provided in the embodiments of this application (1 / 8). Figure 6 This is a schematic diagram of the rotor topology of a 4-pole, 3-layer magnetic barrier, two-phase magnetic material embedded permanent magnet assisted synchronous reluctance motor provided in the embodiments of this application (1 / 8). Figure 7 This is a simulation diagram of the rotor of a reluctance motor provided in the embodiments of this application; wherein, (a) is a rotor topology diagram of a conventional synchronous reluctance motor, (b) is the rotor magnetic field lines and magnetic density cloud diagram of the conventional synchronous reluctance motor at the maximum torque / current (MTPA) point; (c) is a rotor topology diagram of a two-phase magnetic material embedded synchronous reluctance motor provided in the embodiments of this application, and (d) is the rotor magnetic field lines and magnetic density cloud diagram of the two-phase magnetic material embedded synchronous reluctance motor at the MTPA point provided in the embodiments of this application. Figure 8 This is a comparison diagram of the simulated torque of the dual-phase magnetic material embedded synchronous reluctance motor and the traditional synchronous reluctance motor provided in the embodiments of this application; Figure 9 This is a schematic diagram of the preparation of a two-phase magnetic material provided in the embodiments of this application; Figure 10 This is a schematic diagram of magnetic permeability control of a two-phase magnetic material provided in an embodiment of this application; Figure 11 This is a schematic diagram of the welding method for preparing two-phase magnetic materials in the prior art; Figure 12 This is an assembly schematic diagram of the rotor of a two-pole, three-layer magnetic barrier, two-phase magnetic material embedded reluctance motor provided in an embodiment of this application; The attached figures are labeled as follows: 1-Rotor; 2-Magnetic block; 3-Magnetic barrier structure; 4-Sleeve structure; 5-Magnetic phase; 6-Non-magnetic phase; 7-Shaft; 8-Permanent magnet; 9-Ferrite soft magnetic substrate; 10-Coating coverage area; 11-Traditional magnetic material; 12-Traditional non-magnetic material; 13-Weld. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0019] The following description, in conjunction with a preferred embodiment, illustrates the content involved in the above embodiments.

[0020] Example 1 The present invention provides a rotor structure for a two-phase magnetic material embedded motor, comprising: a magnetic guide block 2, a magnetic barrier structure 3, and a sleeve structure 4; The magnetically conductive block 1 has a segmented structure; The sleeve structure 4 is made of a two-phase magnetic material. The sleeve structure 4 includes an outer sheath and an embedded support. The outer sheath is a cylindrical structure disposed on the outside of the rotor 1. The embedded support is a plate-shaped structure embedded in the central shaft of each rotor pole. The embedded support is connected to the outer sheath. The sleeve structure 4 is T-shaped in single pole configuration. The sleeve structure 4 is formed by lamination. The area where the sleeve structure 4 contacts the magnetic barrier structure 3 is set as a non-magnetic phase 6, and the remaining area is set as a magnetic phase 5.

[0021] The outer sheath is used to fix and support the magnetic block 2, enhance mechanical strength and reduce magnetic leakage; the embedded support is used to further enhance mechanical strength.

[0022] like Figure 1 As shown, the magnetic guide block 2 is made of traditional soft magnetic material, and the sleeve structure 4 is made of two-phase magnetic material; the traditional soft magnetic material includes silicon steel, iron-cobalt alloy, or amorphous alloy, etc. The outer sheath supports the rotor's multi-layer magnetic barrier structure, enhancing the rotor's mechanical strength and reducing magnetic leakage, without introducing additional equivalent air gap length. The embedded support further enhances the rotor's mechanical strength without increasing magnetic leakage. Traditional sleeve structures are made of non-magnetic materials, and when sleeved on the outside of the rotor, they are equivalent to increasing the air gap length, which reduces the saliency ratio and average torque. The two-phase magnetic material sleeve structure provided by this invention can improve mechanical strength and reduce magnetic leakage without affecting the rotor's mechanical strength. d The magnetic circuit of the shaft.

[0023] Furthermore, the non-magnetic phase of the two-phase magnetic material sleeve is arranged at the corresponding position of the magnetic bridge in the conventional topology, and the interface between the magnetic and non-magnetic phases is planar.

[0024] Optionally, the sleeve structure is provided with a protruding structure; the segmented magnetic blocks are provided with groove structures that match the protruding structure.

[0025] In this embodiment, when the rotor topology of the motor includes p opposite pole n In the case of a layered magnetic barrier structure, the number of magnetically conductive blocks is 4. p ( n -1)+1.

[0026] In this embodiment, the number of rotor pole pairs p =2, number of magnetic barrier layers n=3, and has a symmetrical structure; the number of magnetic blocks is 17; the material used is a common silicon steel material: 50WW800.

[0027] Furthermore, such as Figures 1-3 As shown, the dual-phase magnetic material sleeve is provided with protrusions, and the segmented magnetic blocks are provided with grooves that match the protrusions to fix the segmented magnetic blocks.

[0028] Optionally, the interface between the magnetically conductive phase 5 and the non-magnetically conductive phase 6 is a plane or a curved surface.

[0029] The interface is planar and has a conical structure, which helps to increase... d Shaft inductance; when the surface is curved, torque ripple can be further reduced.

[0030] In this embodiment, the motor is a reluctance motor or a permanent magnet motor. In one specific embodiment, the motor is a reluctance motor, see reference... Figures 1-3 . Figure 1 This is a schematic diagram of a 1 / 4 structure of the rotor topology of a two-pole, three-layer magnetic barrier, two-phase magnetic material embedded reluctance motor provided in an embodiment of this application; Figure 2 A schematic diagram of a complete two-phase magnetic material sleeve structure; Figure 3 This is a schematic diagram of a segmented magnetic block structure. (Example) Figure 2 and Figure 3 As shown, the sleeve structure is embedded in the segmented magnetic block structure, forming a whole.

[0031] In another specific embodiment, such as Figures 4-6 As shown, when the motor is a permanent magnet motor, it also includes a permanent magnet 8; The magnetic guide block 2 is made of soft magnetic material; the permanent magnet 8 is made of hard magnetic material, and the permanent magnet 8 is inserted into the predetermined position of the magnetic barrier structure 3; The outer sheath contacts multiple magnetic blocks 2 and magnetic barrier structure 3, and the embedded support is embedded in the rotor pole center axis; the area where the outer sheath contacts the permanent magnet 8 is the magnetic phase.

[0032] This embodiment provides a rotor topology for a two-phase magnetic material embedded permanent magnet assisted synchronous reluctance motor, with the rotor pole pairs number... p =4, number of magnetic barrier layers n =3, a permanent magnet is placed in the middle of the streamlined magnetic barrier.

[0033] like Figure 5 and Figure 6 As shown, the sleeve structure is embedded in the segmented magnetic block structure, forming a whole.

[0034] Optionally, the magnetic barrier structure can be in the form of a straight line, a U-shape, a V-shape, a V+1 shape, an arc shape, or a streamlined shape.

[0035] Furthermore, the above embodiments were verified through simulation, and the motor rotor, as shown... Figure 7 As shown, where, Figure 7 Part (a) shows the rotor topology of a conventional synchronous reluctance motor, and part (b) shows the rotor magnetic field lines and magnetic density cloud diagram at the maximum torque / current point of a conventional synchronous reluctance motor. Figure 7 Part (c) shows the rotor topology of the dual-phase magnetic material embedded synchronous reluctance motor provided by the present invention. Figure 7 Part (d) provides the rotor magnetic flux lines and magnetic density cloud diagram of the MTPA point of the two-phase magnetic material embedded synchronous reluctance motor in this embodiment of the application. The stator can adopt an existing stator topology, which will not be described in detail here; to highlight the influence of the two-phase magnetic material sleeve, the main parameters of the two topologies are kept consistent, as shown in Table 2.

[0036] Table 2

[0037] Figure 7 Part (b) is a rotor magnetic field lines and magnetic flux density distribution diagram of a conventional synchronous reluctance motor with an effective current of 3.5A at the MTPA point; Figure 7 Part (d) is the rotor magnetic field lines and magnetic flux density distribution diagram of the MTPA point of the two-phase magnetic material embedded synchronous reluctance motor with an effective current of 3.5A. It can be seen that the leakage flux of the two-phase magnetic material embedded topology is significantly reduced, indicating that the rotor salient polarity of the example in this application is improved, which is beneficial to the improvement of output torque.

[0038] Figure 8 The figures show the torque waveforms for the two topologies when the effective current is 3.5A. The average torque of the conventional synchronous reluctance motor is 2.67 Nm, and the average torque of the two-phase magnetic material embedded reluctance motor is 2.85 Nm. It can be seen that the average torque of the embodiment of the present invention is 6.74% higher than that of the conventional reluctance motor. The torque, power density, and efficiency are shown in Table 3. It can be seen that the embodiment of the present invention effectively improves the power density and efficiency of the motor. Considering that there is still room for further optimization of the structure of the embodiment of the present invention, including the interface between the magnetic and non-magnetic phases of the two-phase magnetic material sleeve and the protrusion and groove structure, the overall performance of the embodiment of the present invention still has great potential for improvement.

[0039] Table 3

[0040] In summary, the embodiments of the present invention have the following advantages: (1) The leakage flux of the motor rotor is significantly reduced, which is conducive to improving the salient pole ratio of the motor, thereby improving the output torque, power density and efficiency. (2) The non-magnetic phase yield strength of the two-phase magnetic material used in the rotor sheath is high, and the sleeve design has a high degree of freedom, which is conducive to improving the stiffness of the motor rotor. (3) The rotor topology decouples the leakage flux of the magnetic bridge and the mechanical strength, which can synergistically improve the maximum speed and output torque of the motor, thereby achieving the improvement of power density and efficiency. (4) The traditional soft magnetic material used in the multi-segment structure of the rotor core is a small slice, which can reduce material waste and save manufacturing costs.

[0041] This invention provides a rotor structure for a dual-phase magnetic material embedded motor. Using dual-phase magnetic material as the rotor sleeve, and by rationally setting the shape and position of the non-magnetic and magnetic phases within the sleeve, leakage flux at the rotor magnetic bridge is effectively reduced. Other areas are designated as magnetic phases, without affecting the original magnetic path of the rotor, further improving the motor's salient pole ratio. This solves the contradiction between leakage flux and mechanical strength in traditional permanent magnet / resistance motors, achieving decoupling of electromagnetic and mechanical performance in multi-layer magnetic barrier structure motors, thereby improving the motor's output torque and maximum speed, ultimately increasing the motor's power density.

[0042] Example 2 This invention also provides a method for preparing a two-phase magnetic material, used to prepare the two-phase magnetic material used in the sleeve structure of the rotor structure of a two-phase magnetic material embedded motor as described in any one of Examples 1, such as... Figure 9 As shown, it includes: S1. A nitrogen-blocking coating of a predetermined thickness is applied to a magnetically conductive phase region on a ferrite soft magnetic substrate 9 to form a coating coverage region 10. The ferrite soft magnetic substrate 9 is then subjected to nitriding and heat treatment to obtain a two-phase magnetic material. During the nitriding process, no nitrogen gas is introduced into the coating coverage region 10, maintaining its magnetic permeability. In the uncoated region, nitrogen gas is introduced, causing a phase transition from a magnetically conductive ferrite structure to a paramagnetic austenite structure. S2. After sandblasting to remove the coating and heat treatment, the target two-phase magnetic material stack is obtained.

[0043] Optionally, during the coating process, by setting nitrogen-barrier coatings of different preset thicknesses, the amount of nitrogen permeation during the nitriding process can be controlled, thereby controlling the degree of magnetic permeability transformation of the two-phase magnetic material and achieving regulation of the magnetic permeability in different regions of the two-phase magnetic material. For example... Figure 10 As shown, different coating thicknesses are set in the magnetically conductive area. t 1. t 2. t 3, of which, t 1> t 2> t 3,t 1. Sufficient thickness can achieve complete nitrogen barrier while maintaining good magnetic permeability in the covered area; t 2 and t A thickness of 3mm can achieve partial nitrogen barrier properties, while maintaining a certain level of magnetic permeability in the covered area; t 1. t 2 and t The magnetic permeability corresponding to the region with different coating thicknesses are as follows: μ 1. μ 2 and μ 3, of which, μ 1> μ 2> μ 3; The uncoated areas are fully nitrided, with a magnetic permeability close to that of air.

[0044] In existing technologies, dual-phase material rotor sleeves prepared by welding are beneficial for improving motor output and heat dissipation capabilities. However, they are essentially made by welding two different materials, such as... Figure 11 As shown, in the prior art, a conventional magnetic material 11 and a conventional non-magnetic material 12 are welded together to form a rotor sleeve, resulting in a weld seam 13 between them. This may pose certain safety issues in practical applications. This embodiment uses a two-phase magnetic material prepared by nitriding, which can realize two-phase structures on a single, complete stack, providing a new approach to solving the aforementioned problems.

[0045] The target two-phase magnetic material stack prepared by the preparation method provided in this embodiment of the invention has a complete rotor stack structure and is less prone to breakage compared to the welding method for preparing two-phase magnetic materials. It is also easier to control the permeability of different regions of the material, which is beneficial for the control of motor harmonics.

[0046] Example 3 The present invention also provides a rotor assembly method for a two-phase magnetic material embedded motor, comprising: The two-phase magnetic material stacks prepared by the preparation method described in Example 2 are formed into a sleeve by stamping and stacking. Segmented magnetic conductive blocks are formed by laminating traditional soft magnetic materials; When the two-phase magnetic material embedded motor is a reluctance motor, the magnetic guide block is inserted axially into the set position of the two-phase magnetic material sleeve; when the two-phase magnetic material embedded motor is a permanent magnet motor, the magnetic guide block is inserted axially into the set position of the two-phase magnetic material sleeve, and the permanent magnet is inserted into the set position of the magnetic barrier structure. By selectively filling the magnetic barrier structure, a rotor structure for a two-phase magnetic material embedded motor is obtained.

[0047] After obtaining the target two-phase magnetic material stack according to the above preparation method, it is assembled with other structures of the rotor topology to form the rotor structure of a reluctance motor or a permanent magnet motor.

[0048] like Figure 12 As shown, the process includes: stacking two-phase magnetic material laminations to form a two-phase magnetic material sleeve; stacking silicon steel material laminations to form a segmented rotor silicon steel core; inserting the silicon steel core segments and permanent magnets axially into the corresponding positions of the two-phase magnetic material sleeve; and finally, selectively filling the magnetic barrier areas as needed.

[0049] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rotor structure of a doubly salient magnetic material embedded type electric machine, characterized by, The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor.

2. The rotor structure of claim 1, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

3. The rotor structure of claim 1, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

4. The rotor structure of claim 1, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

5. The rotor structure of claim 4, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

6. The rotor structure of claim 1, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

7. A method for producing a dual-phase magnetic material for use in a sleeve structure for a rotor structure of an embedded type electric machine of a dual-phase magnetic material as claimed in any one of claims 1 to 6, characterized by, The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor.

8. The production method according to claim 7, wherein The application relates to a rotor structure of a double-phase magnetic material embedded motor.

9. A rotor assembly method of a doubly salient magnetic material embedded type electric machine, characterized by, The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. The application relates to a rotor structure of a double-phase magnetic material embedded motor. 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