Rotor structure and motor

Abstract

The utility model discloses a rotor structure and a motor. The rotor structure comprises a rotor iron core, magnetic steel and a magnetic isolation body. A plurality of magnetic steel grooves are formed in the rotor core in the circumferential direction of the rotor core, and at least one magnetic isolation groove is formed between every two adjacent magnetic steel grooves; the plurality of magnetic steels are arranged in the plurality of magnetic steel grooves in a one-to-one correspondence manner; the multiple magnetic isolation bodies are arranged in the multiple magnetic isolation grooves in a one-to-one correspondence mode. The rotor can solve the problem of low structural strength of the rotor in the prior art.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a rotor structure and a motor. Background Art

[0002] In recent years, the research and application of permanent magnet motors have attracted people's attention, and permanent magnet motors have been widely used in various fields. In the design process of permanent magnet synchronous motors, the rotor punchings and rotor structures are the key components of permanent magnet synchronous motors, and their innovative designs are particularly important.

[0003] At present, the rotor structure of high-power and high-torque permanent magnet motors still has the problem of large magnetic leakage and low power density. In order to prevent the magnetic leakage coefficient of the permanent magnet from being too large and causing the utilization rate of the permanent magnet to be too low, magnetic isolation measures are usually taken. Therefore, how to improve the rotor structure strength while reducing magnetic leakage has become an urgent problem to be solved. Utility Model Content

[0004] The main purpose of the present application is to provide a rotor structure and a motor to solve the problem of low structural strength of the rotor in the prior art.

[0005] According to one aspect of the present application, a rotor structure is provided, comprising:

[0006] A rotor core, wherein a plurality of magnetic steel slots are arranged on the rotor core along the circumferential direction of the rotor core, and at least one magnetic isolation slot is arranged between every two adjacent magnetic steel slots;

[0007] A magnetic steel, wherein the magnetic steel comprises a plurality of magnetic steels, and the plurality of magnetic steels are arranged in a one-to-one correspondence in the plurality of magnetic steel slots;

[0008] The magnetic isolation body comprises a plurality of magnetic isolation bodies, and the plurality of magnetic isolation bodies are arranged in a one-to-one correspondence in the plurality of magnetic isolation grooves.

[0009] Further, a magnetic isolation groove is provided on both sides of each magnetic steel groove, and the magnetic isolation groove is connected to the magnetic steel groove; and / or,

[0010] A magnetic isolation groove is provided on both sides of each magnetic steel groove, and the magnetic isolation groove is independent of the magnetic steel groove.

[0011] Furthermore, the magnetic steel slot and the magnetic isolation slot are both long slots, the long slots extend along the radial direction of the rotor core, and the distance between the magnetic isolation slots located on both sides of the same magnetic steel slot gradually increases along the radial direction of the rotor core.

[0012] Furthermore, the magnetic steel slot and the magnetic isolation slot are both long slots, the long slots extend along the radial direction of the rotor core, and the distance between the magnetic isolation slots located on both sides of the same magnetic steel slot gradually decreases along the radial direction of the rotor core.

[0013] Furthermore, the magnetic isolation groove is arranged at one end of the magnetic steel groove close to the center of the rotor core, and along the radial direction of the rotor core, the length of the magnetic isolation groove is smaller than the length of the magnetic steel groove.

[0014] Furthermore, the magnetic isolation groove comprises a main body section and a protruding section, the protruding section is arranged on a first side of the main body section, and the magnetic isolation body is arranged in the main body section.

[0015] Further, along the radial direction of the rotor core, the length of the protruding section is smaller than the length of the main body section.

[0016] Further, two magnetic isolation grooves are arranged between every two adjacent magnetic steel grooves, and a gap groove is arranged between the two magnetic isolation grooves, and the gap groove is arranged at intervals from the two magnetic isolation grooves; and / or,

[0017] The gap groove is connected to the two magnetic isolation grooves.

[0018] Furthermore, the magnetic isolation body includes a stainless steel magnetic isolation body or a titanium alloy magnetic isolation body.

[0019] On the other hand, the present application also provides a motor, which includes the above-mentioned rotor structure.

[0020] In the present application, compared with the rotor structure in the prior art, at least one magnetic isolation groove is arranged between every two adjacent magnetic steel grooves, and a plurality of magnetic isolation bodies are arranged one by one in the plurality of magnetic isolation grooves. On the one hand, the magnetic isolation bodies can enhance the overall structural strength of the rotor core. On the other hand, since the magnetic isolation bodies improve the structural strength of the rotor core, while meeting the same structural stress requirements, the width of the magnetic isolation bridge can be narrowed or the magnetic isolation bridge can be omitted, thereby reducing magnetic leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0022] Figure 1 This is a schematic structural diagram of the first rotor core disclosed in the embodiment of the present application;

[0023] Figure 2 The attached embodiment disclosed in this application Figure 1A schematic diagram of the structure of the rotor core without the magnetic separator;

[0024] Figure 3 The attached embodiment disclosed in this application Figure 2 A magnified schematic diagram of the middle A area;

[0025] Figure 4 This is a schematic structural diagram of a second rotor core disclosed in an embodiment of the present application;

[0026] Figure 5 The attached embodiment disclosed in this application Figure 4 A schematic diagram of the structure of the rotor core without the magnetic separator;

[0027] Figure 6 The attached embodiment disclosed in this application Figure 5 A magnified schematic diagram of the middle B area;

[0028] Figure 7 This is a schematic structural diagram of a third rotor core disclosed in an embodiment of the present application;

[0029] Figure 8 The attached embodiment disclosed in this application Figure 7 Schematic diagram of the structure of the rotor core without the magnetic separator.

[0030] The above drawings include the following reference numerals:

[0031] 10. Rotor core; 11. Magnetic steel slot; 12. Magnetic isolation slot; 121. Main body section; 1211. First side; 122. Protruding section; 20. Magnetic isolation body; 30. Gap slot; 40. Magnetic isolation bridge; 50. Fastening hole. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0035] It should be noted that the circumferential direction of the rotor core 10 in this application is Figure 1 The direction indicated by the letter X.

[0036] See also Figures 1 to 8 As shown, the present application provides a rotor structure, which includes a rotor core 10 , magnetic steel and a magnetic isolation body 20 .

[0037] Among them, along the circumferential direction of the rotor core 10, a plurality of magnetic steel slots 11 are arranged on the rotor core 10, and at least one magnetic isolation slot 12 is arranged between every two adjacent magnetic steel slots 11; the magnetic steel includes a plurality of magnetic steels, and the plurality of magnetic steels are arranged one-to-one in the plurality of magnetic steel slots 11 (the magnetic steels are not shown in the accompanying drawings); the magnetic isolation bodies 20 include a plurality of magnetic isolation bodies 20, and the plurality of magnetic isolation bodies 20 are arranged one-to-one in the plurality of magnetic isolation slots 12.

[0038] In this embodiment, the magnetic steel and the magnetic isolation body 20 both include a plurality of them. When the rotor structure is actually processed, a plurality of magnetic steel slots 11 can be arranged in the circumferential direction of the rotor core 10, and then at least one magnetic isolation slot 12 is arranged between each two adjacent magnetic steel slots 11, and then a plurality of magnetic steels are inserted into the plurality of magnetic steel slots 11 one by one, and at the same time, a plurality of magnetic isolation bodies 20 are inserted into the plurality of magnetic isolation slots 12 one by one. The magnetic isolation bodies 20 have high strength and non-magnetic conductivity. The existence of the magnetic isolation bodies 20 can enhance the overall structural strength of the rotor core 10, and to a certain extent prevent the rotor core 10 from being deformed or broken by the centrifugal force when the rotor core 10 is running at a high speed. In addition, a portion of the rotor core 10 in the present embodiment can constitute a magnetic isolation bridge 40, the magnetic isolation bridge 40 is located between two magnetic steels, the magnetic isolation slot 12 can be set on the magnetic isolation bridge 40, and the magnetic isolation body 20 is set in the magnetic isolation slot 12. In this way, since the magnetic isolation body 20 improves the structural strength of the rotor core 10, under the condition of meeting the same structural stress requirements, the width of the magnetic isolation bridge 40 can be designed to be narrower or the magnetic isolation bridge 40 can be omitted, thereby effectively reducing the magnetic leakage of the magnetic steel, thereby reducing the amount of magnetic steel used, reducing the material cost of the motor, and thus improving the power density of the motor having the rotor core 10. At the same time, the magnetic isolation body 20 of the present embodiment also has high thermal conductivity, which can quickly conduct the heat generated by the rotor core 10, and to a certain extent improve the uniformity of the heat distribution of the rotor core 10, thereby reducing the loss of the rotor core 10, and thus improving the efficiency of the motor.

[0039] That is to say, compared with the rotor structure in the prior art, in this embodiment, at least one magnetic isolation groove 12 is arranged between every two adjacent magnetic steel grooves 11, and a plurality of magnetic isolation bodies 20 are arranged one by one in the plurality of magnetic isolation grooves 12. On the one hand, the magnetic isolation bodies 20 can enhance the overall structural strength of the rotor core 10. On the other hand, since the magnetic isolation bodies 20 improve the structural strength of the rotor core 10, while meeting the same structural stress requirements, the width of the magnetic isolation bridge 40 can be narrowed or the magnetic isolation bridge 40 can be omitted, thereby reducing magnetic leakage.

[0040] It is worth noting that one magnetic isolation slot 12 , two magnetic isolation slots 12 , three magnetic isolation slots 12 or more than three magnetic isolation slots 12 may be provided between every two adjacent magnetic steel slots 11 , and the number of magnetic isolation slots 12 may be adjusted according to the size of the rotor core 10 .

[0041] Specifically, when no magnetic isolation body 20 is provided on the rotor core 10, during the high-speed operation of the rotor core 10, the structural stress is mainly provided by the magnetic isolation bridge 40; when at least one magnetic isolation groove 12 is provided between every two adjacent magnetic steel grooves 11, the structural strength of the rotor core 10 is increased due to the addition of the magnetic isolation body 20 in the magnetic isolation groove 12. At this time, the demand for the width of the magnetic isolation bridge 40 becomes smaller, that is, the width of the magnetic isolation bridge 40 can be narrowed or the magnetic isolation bridge 40 can be not provided, thereby reducing leakage magnetic flux.

[0042] It is worth noting that, since the magnetic isolation body 20 has high strength, the magnetic isolation body 20 is arranged in the magnetic isolation groove 12 in this embodiment, which can effectively improve the overall structural strength of the rotor core 10; since the magnetic isolation body 20 has non-magnetic properties, it can effectively reduce leakage flux and improve the power density of the motor. Under the same power level requirement, the amount of magnetic steel is saved, thereby reducing the material cost of the motor; since the magnetic isolation body 20 has high thermal conductivity, when the motor is working, the heat generated by the rotor core 10 can be quickly conducted away through the magnetic isolation body 20, thereby reducing the loss of the rotor core 10 and further improving the motor efficiency.

[0043] Further, see Figures 1 to 6 As shown, in one embodiment shown in the present application, a magnetic isolation groove 12 is provided on both sides of each magnetic steel groove 11, and the magnetic isolation groove 12 is connected to the magnetic steel groove 11; and / or, see Figures 7 and 8 As shown, in another embodiment shown in the present application, a magnetic isolation groove 12 is provided on both sides of each magnetic steel slot 11, and the magnetic isolation groove 12 is independent of the magnetic steel slot 11. In other words, two magnetic isolation grooves 12 are provided between each two adjacent magnetic steel slots 11, and two magnetic isolation bodies 20 are provided in the two magnetic isolation grooves 12 in a one-to-one correspondence. By increasing the number of magnetic isolation grooves 12, more assembly positions can be provided for the magnetic isolation bodies 20, thereby providing a higher structural strength for the rotor core 10, and further reducing the width of the magnetic isolation bridge 40 between the two magnetic steel slots 11, effectively reducing magnetic leakage. Specifically, in this embodiment, the magnetic isolation groove 12 is connected with the magnetic steel groove 11 for easy processing. At this time, the magnetic isolation bridge 40 between two adjacent magnetic steels is narrower or even no magnetic isolation bridge 40 is provided. Then, under the same peak torque condition, the material usage of the rotor core 10 can be saved, thereby reducing the overall weight of the rotor core 10 and further reducing the cost of the motor. At the same time, the magnetic isolation body 20 is provided in the magnetic isolation groove 12 to increase the structural strength of the rotor core 10. When the magnetic isolation groove 12 and the magnetic steel groove 11 in this embodiment are independent of each other, the magnetic isolation body 20 is provided in the magnetic isolation groove 12 to improve the overall structural strength of the rotor core 10.

[0044] Further, see Figures 1 to 6 As shown, the magnetic steel slots 11 and the magnetic isolation slots 12 in this embodiment are both long slots, which extend in the radial direction of the rotor core 10, and the distance between the magnetic isolation slots 12 located on both sides of the same magnetic steel slot 11 gradually increases in the radial direction of the rotor core 10. That is to say, the magnetic isolation slots 12 located on both sides of the same magnetic steel slot 11 are in an outward eight-shaped shape.

[0045] Further, see Figures 7 and 8As shown, the magnetic steel slots 11 and the magnetic isolation slots 12 in this embodiment are both long slots, which extend in the radial direction of the rotor core 10, and the distance between the magnetic isolation slots 12 located on both sides of the same magnetic steel slot 11 gradually decreases in the radial direction of the rotor core 10. That is, the magnetic isolation slots 12 located on both sides of the same magnetic steel slot 11 are in an inner eight-shaped shape.

[0046] Specifically, the magnetic isolation grooves 12 in this embodiment can also be circular grooves, square grooves or polygonal grooves, and along the radial direction of the rotor core 10, in addition to the gradually increasing or gradually decreasing as mentioned above, the distance between the magnetic isolation grooves 12 on both sides of the same magnetic steel groove 11 in this embodiment can also be the distance between the magnetic isolation grooves 12 on both sides of the same magnetic steel groove 11 remains unchanged along the radial direction of the rotor core 10 (not shown in the drawings). It can be understood that no matter what shape the magnetic isolation grooves 12 are, and no matter how the distance between the magnetic isolation grooves 12 on both sides of the same magnetic steel groove 11 changes, as long as it can be ensured that the magnetic isolation body 20 provided on the rotor core 10 can play a supporting role, thereby improving the structural strength of the rotor core 10.

[0047] Further, see Figures 1 to 8 As shown, the magnetic isolation groove 12 in this embodiment is arranged at one end of the magnetic steel groove 11 close to the center of the rotor core 10, and along the radial direction of the rotor core 10, the length of the magnetic isolation groove 12 is less than the length of the magnetic steel groove 11. In this way, not only the overall structural strength of the rotor core 10 can be ensured, but also the utilization rate of the magnetic steel can be improved, thereby reducing the use of magnetic steel, and further reducing the material cost of the motor. It should be noted that the length of the magnetic isolation groove 12 in this embodiment is Figure 3 The length indicated by the letter L2 in the figure is the length of the magnetic steel slot 11. Figure 3 The length is shown by the letter L1.

[0048] Further, see Figure 3 As shown, the magnetic isolation slot 12 in this embodiment includes a main body section 121 and a protruding section 122, the protruding section 122 is arranged on the first side 1211 of the main body section 121, and the magnetic isolation body 20 is arranged in the main body section 121. Since the magnetic isolation bridge 40 is located between two magnetic steels (i.e., between two adjacent magnetic steel slots 11), the magnetic isolation slot 12 having the main body section 121 and the protruding section 122 is arranged on the magnetic isolation bridge 40 in this embodiment. On the one hand, the magnetic isolation body 20 arranged in the magnetic isolation slot 12 can enhance the overall structural strength of the rotor core 10. On the other hand, the existence of the protruding section 122 can narrow the width of the magnetic isolation bridge 40 or not arrange the magnetic isolation bridge 40, thereby reducing magnetic leakage and further improving the power density of the motor.

[0049] It should be noted that, since a magnetic isolation groove 12 is provided on both sides of each magnetic steel groove 11, and the magnetic isolation groove 12 includes a main body section 121 and a protruding section 122, and the protruding section 122 is provided on the first side 1211 of the main body section 121, at this time, the main body section 121 is connected to the magnetic steel groove 11 or the main body section 121 and the magnetic steel groove 11 are independent of each other. Figure 3 As shown, the first side 1211 of the main body section 121 is the side of the main body section 121 away from the magnetic steel slot 11 (that is, the side of the main body section 121 not connected to the magnetic steel slot 11).

[0050] Further, see Figure 3 As shown, along the radial direction of the rotor core 10, the length of the protruding section 122 in this embodiment is less than the length of the main section 121, that is, the main section 121 and the protruding section 122 can form a structure similar to a step. When the motor is running at high speed, the step formed by the main section 121 and the protruding section 122 can limit the magnetic isolation body 20, effectively preventing the magnetic isolation body 20 from being displaced during operation, thereby ensuring the normal operation of the motor and further improving the motor efficiency. It should be noted that the length of the main section 121 in this embodiment is Figure 3 The length shown by the letter L2 in the figure, the length of the protruding section 122 is Figure 3 The length is indicated by the letter L3.

[0051] Further, see Figure 6 As shown, in one embodiment shown in the present application, two magnetic isolation grooves 12 are arranged between each two adjacent magnetic steel grooves 11, and a gap groove 30 is arranged between the two magnetic isolation grooves 12, and the gap groove 30 is arranged at intervals from the two magnetic isolation grooves 12; and / or, see Figure 7 As shown, in another embodiment shown in the present application, the gap slot 30 is connected to the two magnetic isolation slots 12. At this time, the magnetic isolation slot 12 only includes the main body section 121, and the magnetic isolation body 20 is arranged in the main body section 121. That is to say, when the gap slot 30 is arranged at intervals with the two magnetic isolation slots 12, the magnetic isolation bridge 40 is located between the gap slot 30 and the magnetic isolation slot 12, and the existence of the gap slot 30 can not only narrow the width of the magnetic isolation bridge 40, thereby reducing the leakage flux to a certain extent, but also reduce the overall weight of the rotor core 10, thereby reducing the material cost of the motor; when the gap slot 30 is connected to the two magnetic isolation slots 12 (that is, there is no magnetic isolation bridge 40 between the gap slot 30 and the magnetic isolation slot 12), the magnetic isolation bridge 40 that originally plays a supporting role can be cancelled, thereby further reducing the magnetic leakage of the magnetic steel, improving the power density of the motor, and then reducing the use of magnetic steel, and reducing the weight of the rotor core 10, thereby reducing the material cost of the motor.

[0052] Specifically, the rotor core 10 in this embodiment includes a plurality of rotor punchings, which are stacked in sequence along the axial direction of the rotor core 10. The rotor punchings are made of silicon steel material, that is, the rotor core 10 is made of silicon steel material.

[0053] Furthermore, the magnetic separator 20 in this embodiment includes a stainless steel magnetic separator or a titanium alloy magnetic separator, and may also include a magnetic separator 20 made of other materials, as long as the magnetic separator 20 can have the excellent properties of non-magnetic conductivity, high strength, and high thermal conductivity. Among them, the high thermal conductivity of the magnetic separator 20 is mainly compared with silicon steel, and a material with stronger thermal conductivity is used as the magnetic separator 20.

[0054] Further, see Figure 1 As shown, along the circumferential direction of the rotor core 10, the rotor core 10 in this embodiment is further provided with a plurality of fastening holes 50, each fastening hole 50 being provided through the axial direction of the rotor core 10. The plurality of rotor punchings in this embodiment are fixed through the fastening holes 50 to form the rotor core 10.

[0055] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: relative to the rotor structure in the prior art, the present application provides at least one magnetic isolation groove between every two adjacent magnetic steel grooves, and arranges multiple magnetic isolation bodies in the multiple magnetic isolation grooves one by one. Since the magnetic isolation bodies are non-magnetic, high-strength and high-thermal conductive, the presence of the magnetic isolation bodies can enhance the overall structural strength of the rotor core. While meeting the requirements of the same structural stress, the width of the magnetic isolation bridge can be designed to be narrower or no magnetic isolation bridge can be provided, thereby effectively reducing magnetic leakage. At the same time, the heat generated by the rotor core can be quickly conducted away, thereby reducing the rotor core loss and thus improving the motor efficiency.

[0056] On the other hand, the embodiment of the present application further provides a motor, which includes the above-mentioned rotor structure, and thus the motor includes all the technical effects of the above-mentioned rotor structure. Since the technical effects of the rotor structure have been described in detail above, they will not be repeated here.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0059] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rotor structure, characterized in that: include: A rotor core (10), wherein a plurality of magnetic steel slots (11) are provided on the rotor core (10) along a circumferential direction of the rotor core (10), and at least one magnetic isolation slot (12) is provided between every two adjacent magnetic steel slots (11); Magnetic steel, the magnetic steel comprising a plurality of magnetic steels, the plurality of magnetic steels being arranged in a one-to-one correspondence in the plurality of magnetic steel slots (11); A magnetic isolation body (20), wherein the magnetic isolation body (20) comprises a plurality of magnetic isolation bodies (20), and the plurality of magnetic isolation bodies (20) are arranged in a one-to-one correspondence in the plurality of magnetic isolation grooves (12).

2. The rotor structure according to claim 1, characterized in that: A magnetic isolation groove (12) is provided on both sides of each magnetic steel groove (11), and the magnetic isolation groove (12) is connected to the magnetic steel groove (11); and / or a magnetic isolation groove (12) is provided on both sides of each magnetic steel groove (11), and the magnetic isolation groove (12) and the magnetic steel groove (11) are independent of each other.

3. The rotor structure according to claim 2, characterized in that: The magnetic steel slot (11) and the magnetic isolation slot (12) are both long slots, and the long slots extend along the radial direction of the rotor core (10). The distance between the magnetic isolation slots (12) located on both sides of the same magnetic steel slot (11) gradually increases along the radial direction of the rotor core (10).

4. The rotor structure according to claim 2, characterized in that: The magnetic steel slot (11) and the magnetic isolation slot (12) are both long slots, and the long slots extend along the radial direction of the rotor core (10). The distance between the magnetic isolation slots (12) located on both sides of the same magnetic steel slot (11) gradually decreases along the radial direction of the rotor core (10).

5. The rotor structure according to claim 2, characterized in that: The magnetic isolation groove (12) is arranged at one end of the magnetic steel groove (11) close to the center of the rotor core (10), and along the radial direction of the rotor core (10), the length of the magnetic isolation groove (12) is smaller than the length of the magnetic steel groove (11).

6. The rotor structure according to claim 2, characterized in that: The magnetic isolation groove (12) comprises a main body section (121) and a protruding section (122), wherein the protruding section (122) is arranged on a first side (1211) of the main body section (121), and the magnetic isolation body (20) is arranged in the main body section (121).

7. The rotor structure according to claim 6, characterized in that: Along the radial direction of the rotor core (10), the length of the protruding section (122) is smaller than the length of the main body section (121).

8. The rotor structure according to claim 2, characterized in that: Two magnetic isolation grooves (12) are arranged between each two adjacent magnetic steel grooves (11), and a gap groove (30) is arranged between the two magnetic isolation grooves (12), and the gap groove (30) is arranged at intervals from the two magnetic isolation grooves (12); and / or, The gap groove (30) is connected to the two magnetic isolation grooves (12).

9. The rotor structure according to any one of claims 1 to 8, characterized in that: The magnetic isolation body (20) comprises a stainless steel magnetic isolation body or a titanium alloy magnetic isolation body.

10. A motor, characterized in that: The electric machine comprises the rotor structure according to any one of claims 1 to 9.

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