Rotor punching sheet, rotor, motor and aircraft

Abstract

The utility model discloses a rotor punching sheet, a rotor, a motor and an aircraft, the rotor punching sheet comprises a punching sheet body, the punching sheet body is provided with a first sub-groove, the first sub-groove penetrates through the punching sheet body in the thickness direction of the punching sheet body, the first sub-groove is obliquely arranged in the radial outward direction, and the first sub-groove is provided with a second sub-groove. The first sub-groove comprises a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are located on the two sides of the magnetic steel groove in the length direction respectively and communicate with the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove. According to the rotor punching sheet provided by the utility model, the volume of the magnetic steel is increased under the condition that the volume of the rotor punching sheet is not changed, so that the permanent magnet torque of a motor using the rotor punching sheet is improved, and the permanent magnet torque of the motor using the rotor punching sheet is further improved by prolonging the length of the first magnetic isolation bridge.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft, in particular to a rotor punching sheet, a rotor, a motor and an aircraft. Background Art

[0002] The requirements for lightweight aircraft motors are much higher than those for automotive motors. The increase in power density can bring about a significant increase in load capacity. The traditional automotive motor structure can no longer meet the needs of aircraft motors. A motor structure with high output power and high output torque suitable for aircraft is now needed. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a rotor punching, which increases the volume of the magnetic steel without changing the volume, thereby improving the permanent magnet torque of the motor using the rotor punching, and further improving the output power and output torque of the motor.

[0004] The utility model also provides a rotor, wherein the motor comprises the above-mentioned rotor punching sheet.

[0005] The utility model also provides a motor, which comprises the above-mentioned rotor.

[0006] The utility model also provides an aircraft, which comprises the above-mentioned motor.

[0007] According to the rotor punching sheet of the utility model embodiment, it includes: a punching sheet body, a first sub-groove is provided on the punching sheet body, the first sub-groove penetrates the punching sheet body in the thickness direction of the punching sheet body, the first sub-groove is inclined in the radial outward direction, the first sub-groove includes a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are connected to the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove.

[0008] According to the rotor punching of the embodiment of the utility model, a first sub-groove is provided on the punching body, the first sub-groove penetrates the punching body in the thickness direction of the punching body, the first sub-groove is inclined in the radial outward direction, the first sub-groove includes a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are connected to the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove, so that the volume of the magnetic steel is increased while the volume of the rotor punching remains unchanged, thereby improving the permanent magnet torque of the motor using the rotor punching, and at the same time, the length of the first magnetic isolation bridge is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor is greatly improved, thereby improving the permanent magnet torque of the motor using the rotor punching.

[0009] In some embodiments of the utility model, the two walls in the width direction of the magnetic steel groove are respectively the first wall and the second wall, the first magnetic isolation groove has a third wall directly connected to the first wall and a fourth wall directly connected to the second wall, the first wall and the third wall are not flush; and / or the second wall and the fourth wall are not flush.

[0010] In some embodiments of the utility model, the first wall surface is located on the side of the second wall surface that is inclined toward the first sub-groove, the first wall surface is flush with the third wall surface, the second wall surface is not flush with the fourth wall surface, and in the direction from one end of the first sub-groove close to the center of the punch body to one end away from the center of the punch body, the end of the fourth wall surface that is away from the second wall surface is inclined toward the third wall surface.

[0011] In some embodiments of the utility model, at least one of the third wall surface and the fourth wall surface has a first limiting protrusion, and the first limiting protrusion abuts against an end surface of the magnetic steel that is away from the second magnetic isolation groove.

[0012] In some embodiments of the utility model, the two walls in the width direction of the magnetic steel groove are respectively the first wall and the second wall, the second magnetic isolation groove has a fifth wall directly connected to the first wall and a sixth wall directly connected to the second wall, the first wall and the fifth wall are not flush; and / or the second wall and the sixth wall are not flush.

[0013] In some embodiments of the utility model, the first wall surface is located on the side of the second wall surface that is inclined toward the first sub-groove, the first wall surface is flush with the fifth wall surface, the second wall surface is not flush with the sixth wall surface, and in the direction from one end of the first sub-groove close to the center of the punch body to one end away from the center of the punch body, the end of the sixth wall surface that is away from the second wall surface is inclined toward the fifth wall surface.

[0014] In some embodiments of the utility model, at least one of the fifth wall surface and the sixth wall surface has a second limiting protrusion, and the second limiting protrusion abuts against an end surface of the magnetic steel that is away from the first magnetic isolation groove.

[0015] In some embodiments of the utility model, a second sub-groove is further provided on the punch body, the second sub-groove has the same structure as the first sub-groove, and the first sub-groove and the second sub-groove have opposite inclination directions in the radial outward direction.

[0016] In some embodiments of the present invention, the first sub-groove and the second sub-groove are jointly formed into a V-shape, and the open mouth of the V-shape faces the radial outer side of the punch body.

[0017] In some embodiments of the present invention, the V-shape formed by the first sub-grooves and the second sub-grooves is a plurality of groups spaced apart along the circumferential direction of the punch body.

[0018] In some embodiments of the utility model, the punching sheet body is provided with a weight-reducing hole, and the weight-reducing hole is provided between at least two adjacent groups of the V-shaped portions.

[0019] According to an embodiment of the present invention, the rotor comprises a magnetic steel and the above-mentioned rotor punching sheet, wherein the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove.

[0020] According to the rotor of the embodiment of the utility model, a rotor punching sheet is provided, and a first sub-groove is provided on the punching sheet body, the first sub-groove penetrates the punching sheet body in the thickness direction of the punching sheet body, and the first sub-groove is inclined in the radial outward direction. The first sub-groove includes a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove. The magnetic steel groove is rectangular, and the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are both connected to the magnetic steel groove. By filling the magnetic steel in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove, the volume of the magnetic steel is increased while the volume of the rotor punching sheet remains unchanged, thereby improving the permanent magnet torque of the motor using the rotor. At the same time, the length of the first magnetic isolation bridge is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor is greatly improved, thereby improving the permanent magnet torque of the motor using the rotor.

[0021] The motor according to the embodiment of the utility model includes the above-mentioned rotor.

[0022] According to the motor of the embodiment of the utility model, a rotor is provided, and a first sub-groove is provided on the punching sheet body, the first sub-groove penetrates the punching sheet body in the thickness direction of the punching sheet body, and the first sub-groove is inclined in the radial outward direction, and the first sub-groove includes a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are connected to the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove, so that the volume of the magnetic steel is increased while the volume of the rotor punching sheet remains unchanged, thereby improving the permanent magnet torque of the motor, and at the same time, the length of the first magnetic isolation bridge is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor is greatly improved, thereby improving the permanent magnet torque of the motor.

[0023] An aircraft according to an embodiment of the utility model includes the above-mentioned motor.

[0024] According to the aircraft of the embodiment of the utility model, a motor is provided, and a first sub-groove is provided on the punching sheet body, the first sub-groove penetrates the punching sheet body in the thickness direction of the punching sheet body, and the first sub-groove is inclined in the radial outward direction, and the first sub-groove includes a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are connected to the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove, so that the volume of the magnetic steel is increased while the volume of the rotor punching sheet remains unchanged, thereby improving the permanent magnet torque of the motor, and the length of the first magnetic isolation bridge is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor is greatly improved, and the permanent magnet torque of the motor is further improved, so that the aircraft can bear a larger load.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of a rotor according to an embodiment of the utility model;

[0028] Figure 2 It is a partial schematic diagram of a rotor punching sheet according to an embodiment of the utility model;

[0029] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0030] Reference numerals:

[0031] 1000, rotor;

[0032] 100. Rotor punching;

[0033] 1. Punching sheet body; 11. First sub-slot; 111. Magnetic steel slot; 1111. First wall surface; 1112. Second wall surface; 112. First magnetic isolation slot; 1121. Third wall surface; 1122. Fourth wall surface; 1123. First limiting protrusion; 113. Second magnetic isolation slot; 1131. Fifth wall surface; 1132. Sixth wall surface; 1133. Second limiting protrusion; 12. Second sub-slot; 13. Weight reduction hole;

[0034] 2. The first magnetic isolation bridge;

[0035] 3. The second magnetic isolation bridge;

[0036] 200. Magnetic steel. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The rotor punching sheet 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0041] like Figure 1-Figure 3 As shown, a rotor punching sheet 100 according to an embodiment of the present utility model comprises a punching sheet body 1 .

[0042] Among them, a first sub-groove 11 is provided on the punch body 1, and the first sub-groove 11 penetrates the punch body 1 in the thickness direction of the punch body 1. The first sub-groove 11 is inclined in the radial outward direction. The first sub-groove 11 includes a magnetic steel groove 111, a first magnetic isolation groove 112 and a second magnetic isolation groove 113. The magnetic steel groove 111 is rectangular. The first magnetic isolation groove 112 and the second magnetic isolation groove 113 are respectively located on both sides of the length direction of the magnetic steel groove 111 and are both connected to the magnetic steel groove 111. The magnetic steel 200 is filled in a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and the magnetic steel groove 111.

[0043] It can be understood that when the rotor punching 100 of the present application is applied to a motor, the magnetic steel 200 located in the first sub-slot 11 forms the rotor magnetic field of the rotor 1000. When the rotor 1000 rotates, the rotor magnetic field interacts with the stator magnetic field to generate electromagnetic torque, thereby driving the motor to rotate.

[0044] Thus, by filling the magnetic steel 200 in a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and the magnetic steel groove 111, the volume of the magnetic steel 200 is increased while the volume of the rotor punching 100 remains unchanged, thereby improving the permanent magnet torque of the motor using the rotor punching 100, and further improving the output power and output torque of the motor. At the same time, the rectangular magnetic steel groove 111 can maximize the use of space, so that the filling rate of the magnetic steel 200 in the magnetic steel groove 111 is higher, further improving the magnetic energy density and performance of the motor.

[0045] In addition, the area where the magnetic steel 200 is not filled in the first magnetic isolation groove 112 and the second magnetic isolation groove 113 forms an injection channel for filling the injection material, thereby ensuring the stability of the magnetic steel 200 during the high-speed rotation of the motor. Specifically, a plurality of rotor punchings 100 are stacked to form a rotor core, and the magnetic steel 200 is located in the first sub-slots 11 of the plurality of rotor punchings 100. The molten plastic is injected into the injection channel of the plurality of rotor punchings 100 using an injection molding machine, thereby reinforcing the magnetic steel 200 and reducing the risk of the magnetic steel 200 being broken.

[0046] The first magnetic isolation bridge 2 is formed between the radial outer end of the first sub-slot 11 and the outer peripheral surface of the rotor punching 100, thereby effectively preventing the magnetic flux from leaking directly from the magnetic steel 200 to the outside of the rotor 1000, thereby strengthening the rotor magnetic field. At the same time, the first sub-slot 11 is tilted in the radial outward direction to extend the length of the first magnetic isolation bridge 2, further reducing magnetic leakage. In addition, the rotor magnetic field is strengthened by the first magnetic isolation bridge 2, so that the air gap magnetic density of the motor using the rotor punching 100 is greatly improved, so that more permanent magnets pass through the air gap, which is further beneficial to the improvement of the motor torque. By increasing the torque, the input current of the motor can be greatly reduced without changing the stator, so that the current density of the motor can be reduced under the same torque, the motor efficiency can be increased, and the temperature rise of the motor can be greatly reduced. It can also be achieved by reducing the volume of the motor by keeping the current density unchanged.

[0047] Optionally, the punch body 1 is punched from a silicon steel sheet or a cobalt iron sheet.

[0048] According to the rotor punching sheet 100 of the embodiment of the utility model, a first sub-slot 11 is provided on the punching sheet body 1, and the first sub-slot 11 penetrates the punching sheet body 1 in the thickness direction of the punching sheet body 1. The first sub-slot 11 is tilted in the radial outward direction. The first sub-slot 11 includes a magnetic steel slot 111, a first magnetic isolation slot 112 and a second magnetic isolation slot 113. The magnetic steel slot 111 is rectangular, and the first magnetic isolation slot 112 and the second magnetic isolation slot 113 are respectively located on both sides of the length direction of the magnetic steel slot 111 and are both connected to the magnetic steel slot 111. By filling the magnetic steel 200 into a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and the magnetic steel groove 111, the volume of the magnetic steel 200 is increased while the volume of the rotor punching 100 remains unchanged, thereby improving the permanent magnet torque of the motor using the rotor punching 100. At the same time, the length of the first magnetic isolation bridge 2 is extended to reduce leakage flux and strengthen the rotor magnetic field, so that the air gap magnetic density of the rotor 1000 is greatly improved, thereby improving the permanent magnet torque of the motor using the rotor punching 100.

[0049] In some embodiments of the present invention, Figure 1-Figure 3As shown, the two walls in the width direction of the magnetic steel groove 111 are respectively the first wall 1111 and the second wall 1112, the first magnetic isolation groove 112 has a third wall 1121 directly connected to the first wall 1111 and a fourth wall 1122 directly connected to the second wall 1112, the first wall 1111 and the third wall 1121 are not flush; and / or the second wall 1112 and the fourth wall 1122 are not flush.

[0050] It is understandable that the first wall 1111 and the third wall 1121 are not flush, and the second wall 1112 and the fourth wall 1122 are not flush; or, the first wall 1111 and the third wall 1121 are not flush; or, the second wall 1112 and the fourth wall 1122 are not flush. Thus, by such an arrangement, the magnetic steel slot 111 is formed into the largest rectangular slot inside the first sub-slot 11, so that the magnetic steel slot 111 has better bending and compression resistance, effectively disperses and withstands pressure from all directions, better protects the magnetic steel 200, and improves reliability.

[0051] Further, the end of the third wall 1121 away from the first wall 1111 is connected to the end of the fourth wall 1122 away from the second wall 1112; or, the first magnetic isolation slot 112 further has a seventh wall, and the two ends of the seventh wall are respectively connected to the end of the third wall 1121 away from the first wall 1111 and the end of the fourth wall 1122 away from the second wall 1112. Thus, the versatility of the rotor punching 100 is improved through such a setting, so that the rotor punching 100 can meet the needs of motors with different output powers or output torques.

[0052] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the first wall 1111 is located on the side of the second wall 1112 that is inclined toward the first sub-groove 11, the first wall 1111 is flush with the third wall 1121, the second wall 1112 is not flush with the fourth wall 1122, and in the direction from one end of the first sub-groove 11 close to the center of the punch body 1 to the end away from the center of the punch body 1, the end of the fourth wall 1122 that is away from the second wall 1112 is inclined toward the third wall 1121.

[0053] It can be understood that since the rotor punching sheet 100 is circular, the fourth wall 1122 is inclined toward the third wall 1121 from the end of the first sub-slot 11 close to the center of the punching sheet body 1 to the end away from the center of the punching sheet body 1, so that the first magnetic isolation groove 112 can better utilize the space of the punching sheet body 1, further expand the volume of the first magnetic isolation groove 112 and the first sub-slot 11, so that the filling rate of the magnet 200 in the first magnetic isolation groove 112 is higher, further improving the magnetic energy density and performance of the motor.

[0054] At the same time, when the first magnetic isolation groove 112 is located radially outside the second magnetic isolation groove 113, due to the first magnetic isolation bridge 2 formed between the fourth wall 1122 and the outer peripheral surface of the rotor punching body 100, the fourth wall 1122 is inclined toward the third wall 1121 from the end of the first sub-slot 11 close to the center of the punching body 1 to the end away from the center of the punching body 1, thereby further extending the length of the first magnetic isolation bridge 2, effectively preventing the magnetic flux from leaking directly from the magnetic steel 200 to the outside of the rotor 1000, and strengthening the rotor magnetic field.

[0055] In some embodiments of the present invention, Figure 1-Figure 3 As shown, at least one of the third wall surface 1121 and the fourth wall surface 1122 has a first limiting protrusion 1123, and the first limiting protrusion 1123 abuts against the end surface of the magnetic steel 200 that is away from the second magnetic isolation groove 113. Therefore, the first limiting protrusion 1123 limits the magnetic steel 200, thereby effectively preventing the displacement of the magnetic steel 200, thereby improving the reliability of the rotor punching 100, reducing the assembly difficulty of the subsequent injection molding process, and improving the assembly efficiency.

[0056] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the two walls in the width direction of the magnetic steel groove 111 are respectively the first wall 1111 and the second wall 1112, the second magnetic isolation groove 113 has a fifth wall 1131 directly connected to the first wall 1111 and a sixth wall 1132 directly connected to the second wall 1112, the first wall 1111 and the fifth wall 1131 are not flush; and / or the second wall 1112 and the sixth wall 1132 are not flush.

[0057] It is understandable that the first wall surface 1111 and the fifth wall surface 1131 are not flush, and the second wall surface 1112 and the sixth wall surface 1132 are not flush; or, the first wall surface 1111 and the fifth wall surface 1131 are not flush; or, the second wall surface 1112 and the sixth wall surface 1132 are not flush. Therefore, such a setting further ensures that the magnetic steel slot 111 is formed as the largest rectangular slot inside the first sub-slot 11, so that the magnetic steel slot 111 has better bending and compression resistance, effectively disperses and withstands pressure from all directions, better protects the magnetic steel 200, and improves reliability.

[0058] Further, the end of the fifth wall 1131 away from the first wall 1111 is connected to the end of the sixth wall 1132 away from the second wall 1112; or, the second magnetic isolation slot 113 further has an eighth wall, and the two ends of the eighth wall are respectively connected to the end of the fifth wall 1131 away from the first wall 1111 and the end of the sixth wall 1132 away from the second wall 1112. Thus, the versatility of the rotor punching 100 is improved through such a setting, so that the rotor punching 100 can meet the needs of motors with different output powers or output torques.

[0059] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the first wall 1111 is located on the side of the second wall 1112 that is inclined toward the first sub-slot 11, the first wall 1111 is flush with the fifth wall 1131, the second wall 1112 is not flush with the sixth wall 1132, and in the direction from the end of the first sub-slot 11 close to the center of the sheet body 1 to the end away from the center of the sheet body 1, the end of the sixth wall 1132 that is away from the second wall 1112 is inclined toward the fifth wall 1131. Thus, through such an arrangement, the second magnetic isolation slot 113 can better utilize the space of the sheet body 1, further expand the volume of the second magnetic isolation slot 113 and the first sub-slot 11, so that the filling rate of the magnetic steel 200 in the second magnetic isolation slot 113 is higher, and the magnetic energy density and performance of the motor are further improved.

[0060] In some embodiments of the present invention, Figure 1-Figure 3 As shown, at least one of the fifth wall surface 1131 and the sixth wall surface 1132 has a second limiting protrusion 1133, and the second limiting protrusion 1133 abuts against the end surface of the magnetic steel 200 that is away from the first magnetic isolation groove 112. Therefore, the second limiting protrusion 1133 limits the magnetic steel 200, thereby effectively preventing the displacement of the magnetic steel 200, thereby improving the reliability of the rotor punching 100, reducing the assembly difficulty of the subsequent injection molding process, and improving the assembly efficiency.

[0061] In some embodiments of the present invention, Figure 1-Figure 3As shown, the punch body 1 is also provided with a second sub-slot 12, and the second sub-slot 12 has the same structure as the first sub-slot 11, and the first sub-slot 11 and the second sub-slot 12 are inclined in opposite directions in the radially outward direction. Thus, the permanent magnetic torque of the motor using the rotor punch 100 is improved by the magnetic steel 200 located in the second sub-slot 12, and the second sub-slot 12 increases the volume of the magnetic steel 200 when the volume of the rotor punch 100 remains unchanged, further improving the permanent magnetic torque of the motor using the rotor punch 100. At the same time, a second magnetic isolation bridge 3 is formed between the radial inner end of the first sub-slot 11 and the radial inner end of the second sub-slot 12, and the second magnetic isolation bridge 3 is severely saturated with magnetic flux density, so that more rotor magnetic fields can interact with the stator through the air gap to form a larger torque, thereby improving the permanent magnetic torque output of the motor and further improving the performance of the motor.

[0062] Further, the first magnetic isolation groove 112 is located radially outside the second magnetic isolation groove 113, the first wall 1111 is located on the side of the second wall 1112 that is inclined toward the first sub-slot 11, the first wall 1111 is flush with the fifth wall 1131, the second wall 1112 is not flush with the sixth wall 1132, and in the direction from the end of the first sub-slot 11 close to the center of the sheet body 1 to the end away from the center of the sheet body 1, the end of the sixth wall 1132 that is away from the second wall 1112 is inclined toward the fifth wall 1131. Therefore, through such a setting, the first sub-slot 11 and the second sub-slot 12 can maximize the use of the sheet body 1, and extend the length of the second magnetic isolation bridge 3, further improving the magnetic energy density and performance of the motor.

[0063] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the first sub-slot 11 and the second sub-slot 12 are formed into a V-shape together, and the opening of the V-shape faces the radial outer side of the sheet body 1. Thus, the V-shape arrangement helps to optimize the magnetic field distribution in the rotor sheet 100, so that the magnetic steel 200 placed in the first sub-slot 11 and the magnetic steel 200 placed in the second sub-slot 12 can generate a stronger and more uniform magnetic field, thereby improving the performance of the motor using the rotor sheet 100. At the same time, the V-shape opening faces the radial outer side of the sheet body 1, which can reduce harmonics and vibrations during the operation of the motor, thereby improving the efficiency and life of the motor.

[0064] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the V-shaped structure formed by the first sub-slots 11 and the second sub-slots 12 is a plurality of groups spaced apart along the circumferential direction of the sheet body 1. Thus, the rotor magnetic field is effectively improved by such an arrangement, and the rotor magnetic field is stronger and more uniform, further improving the performance of the motor using the rotor sheet 100.

[0065] In some embodiments of the present invention, Figure 1-Figure 3As shown, the punch body 1 has a weight-reducing hole 13, and at least part of the weight-reducing holes 13 are provided between two adjacent groups of V-shaped parts. Thus, the weight-reducing holes 13 reduce the overall weight of the rotor 1000, thereby reducing the overall load of the motor, thereby reducing the power consumption of the motor, and improving the efficiency of the motor.

[0066] Furthermore, the weight-reducing hole 13 is located between any two adjacent groups of V-shaped parts and at the radial inner end of the rotor punching 100. Thus, through such an arrangement, the weight-reducing hole 13 is more in line with the trend of the magnetic force lines, reducing the interference or obstruction to the magnetic force lines, and helping to maintain the stability and continuity of the magnetic field, thereby ensuring that the performance of the motor will not be reduced due to the arrangement of the weight-reducing hole 13.

[0067] Furthermore, any two adjacent groups of V-shaped grooves are provided with a weight-reducing hole 13. Thus, such an arrangement can effectively reduce the overall weight of the rotor punching 100 while further maintaining the stability and continuity of the magnetic field.

[0068] The rotor 1000 according to the embodiment of the present invention is described below.

[0069] The rotor 1000 according to the embodiment of the present invention includes a magnetic steel 200 and a rotor punching 100 . The magnetic steel 200 is filled in a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and in the magnetic steel groove 111 .

[0070] According to the rotor 1000 of the embodiment of the utility model, a rotor punching sheet 100 is provided, and a first sub-slot 11 is provided on the punching sheet body 1, and the first sub-slot 11 penetrates the punching sheet body 1 in the thickness direction of the punching sheet body 1, and the first sub-slot 11 is inclined in the radial outward direction, and the first sub-slot 11 includes a magnetic steel slot 111, a first magnetic isolation slot 112, and a second magnetic isolation slot 113. The magnetic steel slot 111 is rectangular, and the first magnetic isolation slot 112 and the second magnetic isolation slot 113 are respectively located on both sides of the length direction of the magnetic steel slot 111 and are both adjacent to the magnetic steel slot 111. 11 is connected, and the magnet 200 is filled in a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and the magnetic steel groove 111, so that the volume of the magnet 200 is increased while the volume of the rotor punching 100 remains unchanged, thereby improving the permanent magnet torque of the motor using the rotor 1000. At the same time, the length of the first magnetic isolation bridge 2 is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor 1000 is greatly improved, thereby improving the permanent magnet torque of the motor using the rotor 1000.

[0071] The motor of the embodiment of the utility model is described below.

[0072] The motor according to the embodiment of the present invention includes a rotor 1000 .

[0073] According to the motor of the embodiment of the utility model, a rotor 1000 is provided, and a first sub-slot 11 is provided on the punching sheet body 1, the first sub-slot 11 penetrates the punching sheet body 1 in the thickness direction of the punching sheet body 1, and the first sub-slot 11 is inclined in the radial outward direction, and the first sub-slot 11 includes a magnetic steel slot 111, a first magnetic isolation slot 112 and a second magnetic isolation slot 113, the magnetic steel slot 111 is rectangular, the first magnetic isolation slot 112 and the second magnetic isolation slot 113 are respectively located on both sides of the length direction of the magnetic steel slot 111 and are both connected to the magnetic steel slot 111, and the magnetic steel 200 is filled in a part of at least one of the first magnetic isolation slot 112 and the second magnetic isolation slot 113 and the magnetic steel slot 111, so that the volume of the magnetic steel 200 is increased while the volume of the rotor punching sheet 100 remains unchanged, thereby improving the permanent magnet torque of the motor, and at the same time, the length of the first magnetic isolation bridge 2 is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor 1000 is greatly improved, thereby improving the permanent magnet torque of the motor.

[0074] Further, the motor is an inner rotor 1000 motor. It is understandable that the motor also includes a stator, the stator has an assembly groove, and the rotor 1000 is suitable for being located in the assembly groove. Optionally, the motor of the present application can be a ducted motor.

[0075] It should be noted that the inventor of the present application has tested in experiments that the permanent magnet torque density of the motor improved by the above-mentioned method is increased by more than 8%.

[0076] The following describes an aircraft according to an embodiment of the present utility model.

[0077] An aircraft according to an embodiment of the utility model includes a motor.

[0078] According to the aircraft of the embodiment of the utility model, a motor is provided, and a first sub-groove 11 is provided on the punch body 1, the first sub-groove 11 penetrates the punch body 1 in the thickness direction of the punch body 1, and the first sub-groove 11 is inclined in the radial outward direction, and the first sub-groove 11 includes a magnetic steel groove 111, a first magnetic isolation groove 112 and a second magnetic isolation groove 113, the magnetic steel groove 111 is rectangular, the first magnetic isolation groove 112 and the second magnetic isolation groove 113 are respectively located on both sides of the length direction of the magnetic steel groove 111 and are both connected to the magnetic steel groove 111, and the magnetic steel 200 is filled in a part of at least one of the first magnetic isolation groove 112 and the second magnetic isolation groove 113 and the magnetic steel groove 111, so that the volume of the magnetic steel 200 is increased while the volume of the rotor punch 100 remains unchanged, thereby improving the permanent magnet torque of the motor, and the length of the first magnetic isolation bridge 2 is extended, the leakage magnetic flux is reduced, and the rotor magnetic field is strengthened, so that the air gap magnetic density of the rotor 1000 is greatly improved, and the permanent magnet torque of the motor is further improved, so that the aircraft can bear a larger load.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor punching, characterized in that: include: A punching sheet body, wherein a first sub-groove is provided on the punching sheet body, wherein the first sub-groove penetrates the punching sheet body in the thickness direction of the punching sheet body, and the first sub-groove is inclined in the radial outward direction, and the first sub-groove comprises a magnetic steel groove, a first magnetic isolation groove and a second magnetic isolation groove, wherein the magnetic steel groove is rectangular, the first magnetic isolation groove and the second magnetic isolation groove are respectively located on both sides of the length direction of the magnetic steel groove and are both connected with the magnetic steel groove, and the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove.

2. The rotor punching according to claim 1, characterized in that: The two walls of the magnetic steel groove in the width direction are respectively the first wall and the second wall. The first magnetic isolation groove has a third wall directly connected to the first wall and a fourth wall directly connected to the second wall. The first wall surface and the third wall surface are not flush; And / or, the second wall surface and the fourth wall surface are not flush.

3. The rotor punching according to claim 2, characterized in that: The first wall surface is located on the side of the second wall surface that is inclined toward the first sub-groove. The first wall surface is flush with the third wall surface, and the second wall surface is not flush with the fourth wall surface. In the direction from one end of the first sub-groove close to the center of the punch body to the end away from the center of the punch body, the end of the fourth wall surface that is away from the second wall surface is inclined toward the third wall surface.

4. The rotor punching according to claim 2, characterized in that: At least one of the third wall surface and the fourth wall surface has a first limiting protrusion, and the first limiting protrusion abuts against an end surface of the magnetic steel that is away from the second magnetic isolation groove.

5. The rotor punching according to claim 1, characterized in that: The two walls of the magnetic steel groove in the width direction are respectively the first wall and the second wall, and the second magnetic isolation groove has a fifth wall directly connected to the first wall and a sixth wall directly connected to the second wall. The first wall surface and the fifth wall surface are not flush; And / or, the second wall surface and the sixth wall surface are not flush.

6. The rotor punching according to claim 5, characterized in that: The first wall surface is located on the side of the second wall surface that is inclined toward the first sub-groove. The first wall surface is flush with the fifth wall surface, and the second wall surface is not flush with the sixth wall surface. In the direction from one end of the first sub-groove close to the center of the punch body to the end away from the center of the punch body, the end of the sixth wall surface that is away from the second wall surface is inclined toward the fifth wall surface.

7. The rotor punching according to claim 5, characterized in that: At least one of the fifth wall surface and the sixth wall surface has a second limiting protrusion, and the second limiting protrusion abuts against an end surface of the magnetic steel that is away from the first magnetic isolation groove.

8. The rotor punching according to claim 1, characterized in that: The punch body is further provided with a second sub-groove, the second sub-groove has the same structure as the first sub-groove, and the first sub-groove and the second sub-groove have opposite inclination directions in the radially outward direction.

9. The rotor punching according to claim 8, characterized in that: The first sub-groove and the second sub-groove are formed together in a V-shape, and an open mouth of the V-shape faces radially outward of the punch body.

10. The rotor punching according to claim 9, characterized in that: The V-shape formed by the first sub-grooves and the second sub-grooves is a plurality of groups spaced apart along the circumferential direction of the punch body.

11. The rotor punching according to claim 10, characterized in that: The punch body is provided with a weight-reducing hole, and the weight-reducing hole is provided between at least two adjacent groups of the V-shaped portions.

12. A rotor, characterized in that: include: magnetic steel; According to the rotor punching according to any one of claims 1 to 11, the magnetic steel is filled in a part of at least one of the first magnetic isolation groove and the second magnetic isolation groove and in the magnetic steel groove.

13. A motor, characterized in that: Comprising a rotor according to any one of claims 1-12.

14. An aircraft, characterized in that: Comprising an electric machine according to claim 13.

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