Motor, electric drive system and vehicle

Abstract

The invention discloses a motor, an electric drive system and a vehicle. The motor comprises a rotor and a magnetism adjusting assembly, the magnetism adjusting assembly is arranged on the rotor, the magnetism adjusting assembly is provided with a magnetism adjusting flow path, and the medium mass in the magnetism adjusting flow path can be adjusted so as to change the relative position of the magnetism adjusting assembly and the magnetic pole of the rotor. According to the motor provided by the invention, the relative position of the magnetic pole of the magnetic adjusting assembly and the rotor can be actively adjusted by adjusting the medium in the magnetic adjusting flow path, so that the working magnetic field of the motor is effectively adjusted, the controllability is good, and the space requirement on the motor is relatively low.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and more specifically, to an electric motor, an electric drive system having the electric motor, and a vehicle having the electric drive system. Background Technology

[0002] In related technologies, some variable flux motors have a magnetic yoke and a magnetic yoke adjustment device at the rotor end. The axial position of the magnetic yoke is adjusted by the additional magnetic yoke adjustment device, thereby adjusting the working magnetic field. However, the above-mentioned variable flux motors have high requirements for arrangement space, thus there is room for improvement. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the prior art. To this end, the present invention proposes a motor that effectively adjusts the working magnetic field by regulating the relative position of the magnetic poles of the rotor and the magnetic adjustment component.

[0004] The present invention also proposes an electric drive system having the above-mentioned motor.

[0005] The present invention also proposes a vehicle having the above-mentioned electric drive system.

[0006] According to an embodiment of the present invention, the motor includes a rotor and a magnetic adjustment assembly, the magnetic adjustment assembly being disposed on the rotor, the magnetic adjustment assembly having a magnetic adjustment flow path, and the amount of medium in the magnetic adjustment flow path being adjustable to change the relative position of the magnetic poles of the magnetic adjustment assembly and the rotor.

[0007] According to the embodiments of the present invention, the motor can actively adjust the relative position of the magnetic poles of the rotor and the magnetic adjustment component by adjusting the medium in the magnetic adjustment flow path, thereby realizing the effective adjustment of the working magnetic field of the motor and having good controllability, and having low space requirements for the motor.

[0008] According to some embodiments of the present invention, the magnetic adjustment assembly includes a magnetic guide block that is reciprocating relative to the rotor.

[0009] According to some embodiments of the present invention, the magnetic block is capable of reciprocating relative to the rotor along the circumferential direction of the rotor.

[0010] According to some embodiments of the present invention, the rotor has a plurality of magnetic poles, and the magnetic adjustment assembly is disposed across the center line of the magnetic poles.

[0011] According to some embodiments of the present invention, the rotor is provided with a magnetic adjustment groove, and the magnetic adjustment component is located in the magnetic adjustment groove.

[0012] According to some embodiments of the present invention, the magnetic adjustment assembly includes: a magnetic guide block and an elastic element, one end of the elastic element being connected to the magnetic guide block, and the other end of the elastic element being fixed relative to the rotor.

[0013] According to some embodiments of the present invention, the elastic element may have a first state in which the magnetizing flow path contains a first amount of dielectric material to position the magnetically conductive block in a first position; the elastic element may have a second state in which the magnetizing flow path contains a second amount of dielectric material to position the magnetically conductive block in a second position; the elastic element may have a third state in which the magnetizing flow path contains a third amount of dielectric material to position the magnetically conductive block in a third position; the distances of the first position, the second position, and the third position relative to the magnetic poles of the rotor increase from near to far.

[0014] According to some embodiments of the present invention, the magnetic adjustment assembly further includes: a magnetic adjustment housing, the magnetic adjustment housing being installed in the magnetic adjustment groove, one end of the elastic member being connected to the magnetic conductive block, and the other end of the elastic member being connected to the magnetic adjustment housing.

[0015] According to some embodiments of the present invention, the magnetic adjustment housing has a magnetic adjustment cavity, the magnetic adjustment flow path is formed in the magnetic adjustment housing, the magnetic adjustment housing is provided with an inlet, the magnetic guide block is disposed in the magnetic adjustment cavity, and the magnetic guide block is capable of reciprocating within the magnetic adjustment cavity.

[0016] According to some embodiments of the present invention, the rotor has a rotor flow path, and the magnetizing flow path is connected to the rotor flow path.

[0017] According to some embodiments of the present invention, the rotor includes a plurality of rotor laminations, the plurality of rotor laminations being stacked axially, the rotor laminations being provided with magnetizing grooves and flow path grooves, the magnetizing grooves and the flow path grooves both penetrating the rotor laminations along the thickness direction, the magnetizing assembly being mounted on the magnetizing grooves, the flow path grooves of the plurality of rotor laminations being interconnected to form a rotor flow path, the rotor flow path being interconnected with the magnetizing grooves.

[0018] According to some embodiments of the present invention, the flow path groove includes a first flow path groove and a second flow path groove, the rotor includes a plurality of core segments, each core segment includes one rotor lamination or a plurality of rotor laminations arranged at the same angle, and at least two adjacent core segments are staggered circumferentially by a predetermined angle so that the first flow path groove of one core segment is connected to the second flow path groove of the adjacent core segment in both the axial and radial directions.

[0019] According to some embodiments of the present invention, the rotor lamination is provided with a rotor shaft hole for the rotor shaft to pass through, the first flow path groove includes a plurality of first sub-grooves, the plurality of first sub-grooves are dispersed radially along the rotor lamination, the first sub-grooves located at the innermost radial end are connected to the rotor shaft hole, the first sub-grooves located at the outermost radial end are connected to the magnetizing groove, the second flow path groove is adapted to be separated from both the magnetizing groove and the rotor shaft hole, and the second flow path groove is used to connect different first sub-grooves on adjacent core segments.

[0020] According to some embodiments of the present invention, the first flow path groove and the second flow path groove are arranged alternately along the circumference of the rotor lamination.

[0021] According to some embodiments of the present invention, the first flow path groove and the second flow path groove are arranged evenly and alternately, and the preset angle is equal to the central angle formed between the first flow path groove and the second flow path groove.

[0022] According to some embodiments of the present invention, the motor further includes a rotating shaft having a rotating shaft flow path, the rotor being mounted on the rotating shaft having a rotor flow path, and the rotating shaft flow path and the magnetizing flow path being connected through the rotor flow path.

[0023] According to some embodiments of the present invention, the shaft flow path includes a shaft cavity and a shaft through hole disposed on the shaft, the shaft cavity having an inlet end, the shaft through hole connecting the shaft cavity and the outer peripheral surface of the shaft, and the shaft through hole communicating with the rotor flow path.

[0024] According to some embodiments of the present invention, the motor further includes a rotor magnetic shield, the rotor magnetic shield being disposed at at least one axial end of the rotor, and the rotor abutting against the rotor magnetic shield.

[0025] An electric drive system according to another embodiment of the present invention includes the motor described above.

[0026] A vehicle according to another aspect of the present invention includes the above-described electric drive system.

[0027] According to an embodiment of the present invention, the motor of the vehicle can actively adjust the relative position of the magnetic poles of the rotor and the magnetic adjustment component by adjusting the medium in the magnetic adjustment flow path, thereby realizing effective adjustment of the working magnetic field of the motor and having good controllability, and having low space requirements for the motor.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Figure 1This is a three-dimensional schematic diagram of the motor shaft, rotor, rotor magnetic shield, first bearing and second bearing according to an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A schematic front cross-sectional view of the structure shown.

[0031] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0032] Figure 4 This is a top view of the radial stator, rotor, and magnetic adjustment assembly;

[0033] Figure 5 yes Figure 4 A top view of one of the magnetic poles of the structure shown (the magnetic block is in the first extreme position);

[0034] Figure 6 yes Figure 4 A top view of one of the magnetic poles of the structure shown (the magnetic block is in the second extreme position);

[0035] Figure 7 This is a three-dimensional schematic diagram of the magnetizing component;

[0036] Figure 8 It is a three-dimensional schematic diagram of the magnetic conductive block and the elastic element;

[0037] Figure 9 This is a three-dimensional schematic diagram of the magnetic conductive block;

[0038] Figure 10 This is a cross-sectional schematic diagram of the magnetizing assembly;

[0039] Figure 11 This is a top view of the radial stator and rotor;

[0040] Figure 12 This is a schematic diagram of the rotor laminations;

[0041] Figure 13 It is a three-dimensional schematic diagram of the rotating shaft;

[0042] Figure 14 This is a cross-sectional view of the shaft;

[0043] Figure 15 This is a three-dimensional schematic diagram of the rotor's magnetic shielding plate;

[0044] Figure 16 This is a schematic diagram of an electric drive system according to an embodiment of the present invention;

[0045] Figure 17 This is a schematic diagram of a vehicle according to an embodiment of the present invention.

[0046] Figure label:

[0047] Vehicle 100, electric drive system 90, motor 10, rotor 2, rotor flow path 20, rotor lamination 21, rotor shaft hole 211, magnetic adjustment slot 212, magnet slot 213, first flow path slot 2141, second flow path slot 2142, permanent magnet 23, magnetic adjustment assembly 3, magnetic adjustment flow path 30, magnetic guide block 31, positioning slot 311, elastic element 32, magnetic adjustment housing 33, inlet 331, magnetic adjustment cavity 332, radial stator 4, radial stator core 41, radial stator winding 42, rotor magnetic shielding plate 6, magnetic shielding plate shaft hole 62, shaft 7, shaft flow path 70, shaft cavity 71, shaft through hole 72, shaft flange 73, first bearing 81, second bearing 82. Detailed Implementation

[0048] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0049] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] The following is combined Figures 1-17 The present invention describes in detail an electric motor 10, an electric drive system 90 having the electric motor 10, and a vehicle 100 having the electric drive system 90 according to embodiments of the present invention.

[0051] Reference Figures 1-4 As shown, the motor 10 according to an embodiment of the present invention may include a rotor 2 and a magnetic adjustment component 3.

[0052] The motor 10 may also include a rotating shaft 7, on which the rotor 2 is mounted. The rotating shaft 7 and the rotor 2 can rotate synchronously or asynchronously. For ease of description, the example of the rotating shaft 7 driving the rotor 2 to rotate synchronously is used for illustration.

[0053] The magnetic adjustment component 3 is mounted on the rotor 2. The magnetic adjustment component 3 has a magnetic adjustment flow path 30, and the amount of medium in the magnetic adjustment flow path 30 is adjustable to change the relative position of the magnetic poles of the magnetic adjustment component 3 and the rotor 2. In other words, the relative position of the magnetic poles of the magnetic adjustment component 3 and the rotor 2 can be adjusted by changing the amount of medium in the magnetic adjustment flow path 30.

[0054] The magnetic adjustment assembly 3 is a component that adjusts the air gap magnetic field of the motor 10 by changing the leakage flux of the permanent magnet. The magnetic adjustment assembly 3 includes a magnetic guide block 31, and the position of the magnetic guide block 31 on the rotor 2 can be adjusted by changing the amount of medium in the magnetic adjustment flow path 30. Specifically, the magnetic guide block 31 is movable relative to the rotor 2, and the medium in the magnetic adjustment flow path 30 can be used to adjust the position of the magnetic guide block 31 on the rotor 2.

[0055] The rotor flow path 20 and the magnetic adjustment flow path 30 constitute at least a part of the system flow path. The system flow path is used to transport the medium to the position of the magnetic guide block 31 to drive the magnetic guide block 31 to move, thereby realizing the active adjustment of the position of the magnetic guide block 31 and realizing active magnetic adjustment.

[0056] In some embodiments, the rotating shaft 7 has a rotating shaft flow path 70, and the rotor 2 has a rotor flow path 20. The rotating shaft flow path 70 and the magnetic adjustment flow path 30 are connected through the rotor flow path 20. The rotating shaft flow path 70, the rotor flow path 20, and the magnetic adjustment flow path 30 constitute the system flow path, and the medium flow direction of the system flow path is as follows: Figures 2-3 As indicated by the middle arrow.

[0057] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figure 11 As shown, the motor 10 also includes a housing and a radial stator 4. The housing has a mounting cavity, and the radial stator 4 is mounted within the mounting cavity. The radial stator 4 is nested with the rotor 2. Optionally, in Figures 4-6 , Figure 11 In the example shown, the radial stator 4 can be fitted around the outer periphery of the rotor 2; alternatively, the rotor 2 can be fitted around the outer periphery of the radial stator 4 (not shown in the figure). When the rotor 2 rotates, the rotor 2 and the radial stator 4 move circumferentially relative to each other, which can generate a magnetic field. When the magnetic guide block 31 moves relative to the rotor 2, the magnetic field between the rotor 2 and the radial stator 4 changes.

[0058] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figure 11 As shown, the radial stator 4 includes a radial stator core 41 and a radial stator winding 42, with the radial stator winding 42 wound around the radial stator core 41.

[0059] In some embodiments of the present invention, reference is made to... Figures 1-2 One end of the rotating shaft 7 is supported on the outer casing by the first bearing 81, and the other end of the rotating shaft 7 is supported on the outer casing by the second bearing 82. This reduces the wear between the rotating shaft 7 and the outer casing, making the rotating shaft 7 rotate more smoothly and steadily.

[0060] Optionally, the shaft flow path 70 can be directly connected to a medium source outside the motor 10, or it can be connected to the medium source through a connecting pipe. After the medium from the medium source enters the shaft flow path 70, it further enters the magnetic adjustment flow path 30 through the rotor flow path 20. By changing the amount of medium in the magnetic adjustment flow path 30, the position of the magnetic guide block 31 on the rotor 2 can be actively adjusted. When the position of the magnetic guide block 31 on the rotor 2 changes, the original magnetic properties of the rotor 2 are altered, causing the magnetic field between the rotor 2 and the radial stator 4 to change accordingly, thereby achieving effective adjustment of the working magnetic field of the motor 10.

[0061] In other embodiments, the shaft 7 may not have a shaft flow path 70 inside, and oil may be directly introduced from the end of the rotor 2 into the rotor flow path 20, and then the oil enters the magnetic adjustment flow path 30.

[0062] In addition to providing power for the movement of the magnetic block 31, the medium can also provide some heat dissipation for the shaft 7 and rotor 2, so that the temperature of the motor 10 does not get too high when it is working, which is beneficial to improving the service life of the motor 10.

[0063] Alternatively, the medium can be a gas, such as helium or nitrogen; or it can be a liquid, such as oil or water. For ease of description, we will use oil as an example below.

[0064] Alternatively, the magnetic block 31 can be made of permanent magnet material or soft magnetic material.

[0065] In related technologies, some variable flux motors have a magnetic yoke and a magnetic yoke adjustment device at the rotor end. The axial position of the magnetic yoke is adjusted by the magnetic yoke adjustment device, thereby adjusting the working magnetic field. However, axial adjustment places high demands on the space required for the motor. According to the embodiment of the present invention, the motor 10 can actively adjust the relative position of the magnetic adjustment component 3 and the magnetic poles of the rotor 2 by adjusting the medium within the magnetic adjustment flow path 30. This effectively adjusts the working magnetic field of the motor 10 and provides good controllability. Compared to axial adjustment in related technologies, the magnetic adjustment component 3 in this invention is located on the rotor 2, does not occupy additional axial space, and has lower space requirements for the motor 10.

[0066] The motor 10 according to embodiments of the present invention can effectively adjust the permanent magnet magnetic field, and can control the no-load back EMF and voltage of the motor 10 in real time. For example, in the low-speed region, the no-load back EMF (i.e., permanent magnet flux linkage) can be increased by adjusting the magnet, thereby increasing the torque performance and power performance in the low-speed region. In the high-speed region, the no-load back EMF can be reduced in real time by adjusting the magnet, which can not only reduce core losses, widen the constant power region, and increase the peak torque / power in the high-speed region, but also avoid inverter overvoltage damage to power devices, adding a layer of protection for the electric drive system. At the same time, it is beneficial to improve the high-efficiency region of the motor 10, and achieve a high degree of matching between the high-efficiency region of the motor 10 and the operating point of the new energy vehicle, thereby reducing power consumption and improving economy.

[0067] In addition to adjusting the permanent magnet flux linkage, the variable flux permanent magnet motor 10 of the present invention can also adjust the winding inductance (the magnetic guiding component in the magnetic adjustment component 3 is conducive to increasing the inductance of the motor 10), which is conducive to reusing the inductance of the motor 10 to realize the self-heating or charging functions of the vehicle battery, reducing current harmonics, thereby reducing the risk of magnet heating and demagnetization.

[0068] In some embodiments of the present invention, the magnetic guide block 31 can reciprocate relative to the rotor 2. For example, the magnetic guide block 31 can reciprocate relative to the rotor 2 in a first direction. Thus, in the first direction, the position of the magnetic guide block 31 on the rotor 2 is always within a preset stroke range, which is beneficial to realize the regular adjustment of the working magnetic field of the motor 10 and avoids the problem of magnetic adjustment failure when the magnetic guide block 31 exceeds the preset stroke range.

[0069] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figures 11-12 As shown, the rotor 2 is provided with a magnetic adjustment slot 212, and the magnetic adjustment assembly 3 is located within the magnetic adjustment slot 212. In other words, the magnetic guide block 31 is located within the magnetic adjustment slot 212 and can reciprocate within it. Specifically, the magnetic adjustment slot 212 extends along a first direction, and the magnetic guide block 31 can reciprocate within this first direction. The stroke of the magnetic guide block 31 is limited within the magnetic adjustment slot 212, ensuring accurate positioning of the magnetic guide block 31 on the rotor 2 and high reliability and stability of the magnetic adjustment.

[0070] In some embodiments of the present invention, the first direction is the circumferential direction of the rotor 2. That is, the magnetic block 31 can reciprocate relative to the rotor 2 along the circumferential direction of the rotor 2 to change the original magnetic properties of the rotor 2, thereby achieving effective adjustment of the working magnetic field of the motor 10.

[0071] In some embodiments of the present invention, combined with Figures 4-6 The rotor 2 has multiple magnetic poles, and the magnetic adjustment component 3 spans the center line m of the magnetic poles.

[0072] In some embodiments of the present invention, each pair of magnetic poles includes a positive pole and a negative pole, such as... Figures 5-6 The diagram shows a pair of magnetic poles. The q-axis is the center line between the positive and negative poles, and magnetic adjustment components 3 are provided on both sides of the q-axis.

[0073] In some embodiments of the present invention, the magnetic adjustment assembly 3 further includes an elastic element 32, one end of which is connected to the magnetic block 31, and the other end of which is fixed relative to the rotor 2. The elastic element 32 is adapted to apply an elastic force to the magnetic block 31 to move the magnetic block 31.

[0074] In some embodiments of the present invention, the elastic member 32 may have a first state in which the magnetic flow path 30 contains a first amount of dielectric material to position the magnetically conductive block 31 in a first position; the elastic member 32 may have a second state in which the magnetic flow path 30 contains a second amount of dielectric material to position the magnetically conductive block 31 in a second position; the elastic member 32 may have a third state in which the magnetic flow path 30 contains a third amount of dielectric material to position the magnetically conductive block 31 in a third position; the distances between the first, second, and third positions and the magnetic poles of the rotor 2 increase from near to far, with the second position located between the first and third positions. The lengths of the elastic member 32 are different in the first, second, and third states.

[0075] Optionally, the elastic element 32 is adapted to apply an elastic force to the magnetic block 31, causing the magnetic block 31 to move towards a first position. The medium in the magnetic adjustment flow path 30 is used to push the magnetic block 31 to move towards a third position, and / or, the medium in the magnetic adjustment flow path 30 is used to hold the magnetic block 31 at a target position. That is, when the rotor 2 is not rotating, the magnetic block 31 is held in the first position under the action of the elastic force of the elastic element 32. When the amount of medium in the magnetic adjustment flow path 30 increases, resulting in an increase in thrust, it can push the magnetic block 31 to move towards a third position. Furthermore, by reasonably controlling the amount of medium in the magnetic adjustment flow path 30, the magnetic block 31 can also be held at a target position, wherein the target position can be the first position, the third position, or any intermediate position between the first and third positions.

[0076] When the rotor 2 rotates, the magnetic block 31 moves circumferentially in the direction of rotation of the rotor 2 under the action of centrifugal force. Under the action of centrifugal force, elastic force and hydraulic pressure, the magnetic block 31 moves to the target position. When the rotor 2 stops rotating, the restoring force of the elastic element 32 causes the magnetic block 31 to return to the first position.

[0077] In the circumferential direction of rotor 2, the first position is located on one side of the circumferential direction of the third position. Figures 4-6In some embodiments shown, the first position is located circumferentially to the left of the third position; that is, the first position is near the left end of the circumferential adjustment slot 212, and the third position is near the right end of the circumferential adjustment slot 212. Thus, when the rotor 2 is not rotating, the magnetic block 31 is held in the position near the left end of the circumferential adjustment slot 212 by the elastic force of the elastic member 32. Figure 5 The position shown; when the amount of medium in the magnetic adjustment flow path 30 increases, resulting in an increase in thrust, it can push the magnetic guide block 31 to move towards the right end of the magnetic adjustment groove 212, as shown. Figure 6 As shown in the figure, by reasonably controlling the amount of medium in the magnetic adjustment flow path 30, the magnetic block 31 can also be kept in a position close to the right end of the magnetic adjustment groove 212.

[0078] In some embodiments of the present invention, combined with Figures 9-10 The magnetic block 31 is provided with a positioning groove 311, and one end of the elastic element 32 is embedded in the positioning groove 311. Thus, the relative position of the elastic element 32 and the magnetic block 31 is accurate, preventing the elastic element 32 from deflecting when applying elastic force to the magnetic block 31.

[0079] The elastic element 32 can be a spring or other form, and the elastic form is not limited to tension or compression. For example, optionally, the elastic element 32 is a compression spring, which applies a pushing force to the magnetic block 31 to move the magnetic block 31 to a first position. In this case, the elastic element 32 is in a compressed state. Alternatively, optionally, the elastic element 32 is a tension spring, which applies a pulling force to the magnetic block 31 to move the magnetic block 31 to a first position. In this case, the elastic element 32 is in a stretched state.

[0080] When the rotor 2 rotates, under the action of centrifugal force, the elastic force of the elastic element 32 on the magnetic block 31 changes. For example, when the first position is located on the left side of the third position, after the rotor 2 rotates, the elastic force of the elastic element 32 on the magnetic block 31 decreases, and the magnetic block 31 can move to the right side of the circumference. Thus, the elastic element 32 can passively adjust the position of the magnetic block 31 on the rotor 2.

[0081] Combining the mechanical magnetization of the elastic element 32 and the medium magnetization of the magnetization flow path 30, the rotor 2 of the motor 10 according to this embodiment of the invention employs a combination of passive mechanical magnetization and active medium magnetization, resulting in good controllability of the magnetization. When the medium is oil, the active magnetization is hydraulic, while the passive magnetization relies on centrifugal force. The active magnetization mode involves adjusting the magnetic guide block 31 to a preset position using the medium pressure, and then maintaining the pressure. During active magnetization, the shaft flow path 70, the rotor flow path 20, and the magnetization flow path 30 form a closed cavity. The medium adjusts the position of the magnetic guide block 31 on the rotor 2 through this closed cavity, achieving real-time magnetization.

[0082] In some embodiments of the present invention, reference is made to... Figures 1-3 , Figures 7-10 As shown, the magnetic adjustment assembly 3 also includes a magnetic adjustment housing 33, which is installed in the magnetic adjustment groove 212. One end of the elastic member 32 is connected to the magnetic guide block 31, and the other end of the elastic member 32 is connected to the magnetic adjustment housing 33. By setting the magnetic adjustment housing 33, the magnetic guide block 31 and the elastic member 32 can be protected, and the magnetic adjustment assembly 3 can be made into a whole, which makes it easy to install the magnetic adjustment assembly 3 as a whole in the magnetic adjustment groove 212, or to disassemble the magnetic adjustment assembly 3 as a whole in the magnetic adjustment groove 212.

[0083] In some embodiments of the present invention, reference is made to... Figures 1-3 , Figures 7-10 As shown, the magnetic adjustment housing 33 has a magnetic adjustment cavity 332, a magnetic adjustment flow path 30 is formed within the magnetic adjustment housing 33, and an inlet 331 is provided on the magnetic adjustment housing 33. A magnetic guide block 31 is disposed within the magnetic adjustment cavity 332 and can reciprocate within the magnetic adjustment cavity 332. When the magnetic adjustment cavity 332 extends along a first direction, the magnetic guide block 31 can reciprocate within the magnetic adjustment cavity 332 in the first direction. Figure 10 In the configuration, the first position is the right side position within the magnetic adjustment cavity 332, and the third position is the left side position within the magnetic adjustment cavity 332. The elastic element 32 is a spring, which causes the magnetic guide block 31 to tend to move to the right. When the amount of medium in the magnetic adjustment flow path 30 increases, resulting in an increase in thrust, it can push the magnetic guide block 31 to move to the left, thereby changing the position of the magnetic guide block 31 on the rotor 2 and thus changing the magnetic field between the rotor 2 and the radial stator 4.

[0084] Optionally, in some embodiments, the inlet 331 is located on the side of the spring away from the adjusting magnetic block 31.

[0085] In other embodiments, such as Figure 10 As shown, the inlet 331 is located on the side of the magnetic adjustment block 31 away from the spring.

[0086] In some embodiments of the present invention, the rotor 2 has a rotor flow path 20, and a magnetizing flow path 30 is connected to the rotor flow path 20. Specifically, when the magnetizing assembly 3 includes a magnetizing housing 33, the magnetizing flow path 30 and the rotor flow path 20 are connected through an inlet 331. When the magnetizing assembly 3 does not include a magnetizing housing 33, the magnetizing flow path 30 and the rotor flow path 20 are directly connected.

[0087] The rotating shaft 7 has a rotating shaft flow path 70, and the rotor flow path 20 is connected to the rotating shaft flow path 70. Thus, when the magnetic adjustment assembly 3 includes the magnetic adjustment housing 33, the oil in the rotating shaft flow path 70 can enter the magnetic adjustment housing 33 through the rotor flow path 20 and the inlet 331, that is, enter the magnetic adjustment flow path 30. When the magnetic adjustment assembly 3 does not include the magnetic adjustment housing 33, the oil in the rotating shaft flow path 70 can directly enter the magnetic adjustment flow path 30 through the rotor flow path 20.

[0088] Optionally, ball bearings can be provided on the surface of the magnetic block 31, thereby reducing the friction between the magnetic block 31 and the inner wall of the magnetic adjustment housing 33, making the movement of the magnetic block 31 more stable and smooth.

[0089] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figures 11-12 As shown, the rotor 2 includes multiple rotor laminations 21, which are stacked axially. Each rotor lamination 21 has a magnetic adjustment groove 212 and a flow path groove, both extending through the laminations along their thickness direction. A magnetic adjustment assembly 3 is installed in the magnetic adjustment groove 212. The flow path grooves of the multiple rotor laminations 21 are interconnected to form a rotor flow path 20, which is connected to the magnetic adjustment groove 212. Specifically, the multiple rotor laminations 21 have identical structures, which helps to reduce the cost of the motor 10.

[0090] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figures 11-12 As shown, the rotor lamination 21 has a rotor shaft hole 211 that extends through the rotor lamination 21 along its thickness direction, and the rotating shaft 7 passes through the rotor shaft hole 211. Specifically, the rotor shaft holes 211 of all the rotor laminations 21 are axially connected, thus forming a hollow structure at the middle position of the rotor 2. When the rotor 2 is mounted on the rotating shaft 7, the rotating shaft 7 passes through this hollow structure, that is, the rotating shaft 7 passes through the rotor shaft holes 211 of all the rotor laminations 21. The rotor flow path 20 connects the magnetic adjustment groove 212 and the rotating shaft flow path 70 in both the radial and axial directions.

[0091] In some embodiments of the present invention, reference is made to... Figures 1-6 , Figures 11-12As shown, the flow path includes a first flow path 2141 and a second flow path 2142. The rotor 2 includes multiple core segments, each core segment including one or more rotor laminations 21 arranged at the same angle. At least two adjacent core segments are staggered circumferentially by a predetermined angle so that the first flow path 2141 of one core segment is connected to the second flow path 2142 of the adjacent core segment in both the axial and radial directions. That is, for each core segment, the rotor laminations 21 included in the core segment can be one or more. When the core segment includes multiple rotor laminations 21, the arrangement angles of these rotor laminations 21 in the core segment are all the same, so that the magnetic adjustment grooves 212 of these rotor laminations 21 in the core segment are connected axially, the rotor shaft holes 211 are connected axially, the first flow path 2141 is connected axially, and the second flow path 2142 is connected axially. At least two adjacent core segments are staggered by a predetermined angle along the circumference, so that the first flow path groove 2141 of one core segment is connected to the second flow path groove 2142 of the adjacent core segment in both the axial and radial directions, thereby transmitting the medium at the rotor shaft hole 211 to the magnetizing groove 212 through the first flow path groove 2141 and the second flow path groove 2142 of the two adjacent core segments.

[0092] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figures 11-12 As shown, the rotor lamination 21 has a rotor shaft hole 211 through which the rotating shaft 7 passes. The first flow path groove 2141 includes multiple first sub-grooves, which are radially dispersed along the rotor lamination 21. The innermost first sub-grooves connect to the rotor shaft hole 211, and the outermost first sub-grooves connect to the magnetizing groove 212. The second flow path groove 2142 is adapted to be separated from both the magnetizing groove 212 and the rotor shaft hole 211. The second flow path groove 2142 is used to connect different first sub-grooves on adjacent core sections. In this way, the medium at the rotor shaft hole 211 can reach the magnetizing groove 212 through the first flow path groove 2141 on the first core section, the second flow path groove 2142 on the second core section, and the first flow path groove 2141 on the first core section. Figures 2-6 In the example, the first flow path 2141 includes three first sub-slots, and the second flow path 2142 includes two second sub-slots. The first two first sub-slots are connected by one of the second sub-slots on an adjacent core segment, and the latter two first sub-slots are connected by the other second sub-slot on an adjacent core segment. Thus, the three first sub-slots on one core segment are radially connected through the two second sub-slots on an adjacent core segment.

[0093] According to the embodiment of the present invention, the motor 10 can achieve radial connection of the rotor flow path 20 by offsetting two adjacent iron core segments circumferentially by a preset angle, without the need to add an external transposition structure, which helps to simplify the structure of the motor 10 and reduce costs.

[0094] In some embodiments of the present invention, the first flow path groove 2141 and the second flow path groove 2142 are arranged alternately along the circumference of the rotor lamination 21. In this way, when two adjacent core segments are staggered by a predetermined angle along the circumference, the first flow path groove 2141 of one core segment is always in communication with the second flow path groove 2142 of the adjacent core segment.

[0095] In some embodiments of the present invention, the first flow path groove 2141 and the second flow path groove 2142 are arranged alternately and uniformly, and the preset angle at which two adjacent core segments are staggered circumferentially is equal to the central angle formed between the first flow path groove 2141 and the second flow path groove 2142. Thus, when the angle at which two adjacent core segments are staggered circumferentially is equal to the central angle formed between the first flow path groove 2141 and the second flow path groove 2142, the first flow path groove 2141 of one core segment is always connected to the second flow path groove 2142 of the adjacent core segment.

[0096] In some embodiments of the present invention, reference is made to... Figures 4-6 , Figures 11-12 As shown, the rotor lamination 21 is also provided with a magnetic steel slot 213 that runs through the rotor lamination 21 along its thickness direction. A permanent magnet 23 (also called a magnet) is installed in the magnetic steel slot 213. The permanent magnet 23 can be a commonly used permanent magnet material such as ferrite, neodymium iron boron, or samarium cobalt. There are multiple magnetic steel slots 213, and their arrangement can vary. The magnetic steel slots 213 can be square or arc-shaped. The magnet combination of a single magnetic pole can be in the form of a single layer, two layers, or more than two layers, such as a straight line, a single "V", a double "V", a "I+V", a "U", a "W", or a "V+U" shape. Of course, in some alternative embodiments, the magnetic steel slot 213 can also be a blind slot.

[0097] In some embodiments of the present invention, combined with Figures 4-6 and Figure 12 As shown, for each magnetic pole, each magnetic pole may include multiple magnets (e.g., permanent magnets 23) installed in the magnet slot 213 are arranged symmetrically with respect to the center line m of the magnetic pole.

[0098] Optionally, the rotor laminations 21 may be made of soft magnetic materials, such as silicon steel sheets, amorphous and nanocrystalline alloys, iron-cobalt materials, and stainless steel. The rotor laminations 21 may be further designed with auxiliary slots, uneven air gaps, and skewed poles to suppress magnetic field harmonics, torque pulsation, and NVH.

[0099] In some embodiments of the present invention, reference is made to... Figures 1-3 , Figures 13-14As shown, the shaft flow path 70 includes a shaft cavity 71 and a shaft through hole 72. The shaft cavity 71 has an inlet end, and the shaft through hole 72 connects the shaft cavity 71 and the outer peripheral surface of the shaft 7. The shaft through hole 72 is connected to the rotor flow path 20. Both the shaft cavity 71 and the shaft through hole 72 are located on the shaft 7. The inlet end is suitable for connection to a medium source outside the motor 10. The medium supplied by the medium source enters the shaft flow path 70 through the inlet end, enters the rotor flow path 20 from the shaft cavity 71 through the shaft through hole 72, passes through the first flow path groove 2141 and the second flow path groove 2142 on the adjacent iron core sections with staggered tooth arrangement, and then enters the magnetizing flow path 30, pushing the magnetic guide block 31 to move to the third position. By changing the amount of medium in the shaft flow path 70, the amount of medium in the magnetizing flow path 30 can be changed accordingly, thereby actively adjusting the position of the magnetic guide block 31 on the rotor 2 and realizing the active magnetizing of the motor 10.

[0100] Optionally, the shaft cavity 71 may extend along the axial direction of the shaft 7, and the shaft through hole 72 may extend radially along the shaft 7. The shapes of the shaft cavity 71 and the shaft through hole 72 may be cylindrical. Of course, the shapes of the shaft cavity 71 and the shaft through hole 72 are not limited to cylindrical, and the cross-section of the shaft through hole 72 and the shaft 7 are not limited to being parallel, but may have a certain included angle.

[0101] In some embodiments of the present invention, reference is made to... Figures 1-3 , Figure 15 As shown, the motor 10 also includes a rotor magnetic shielding plate 6. The rotor magnetic shielding plate 6 is used to limit the axial displacement of the rotor 2 and as a counterweight in the dynamic balancing experiment of the rotor 2. The rotor magnetic shielding plate 6 has a magnetic shielding function, which can reduce the magnetic field leakage of the rotor 2 and also help reduce eddy current losses. The rotor magnetic shielding plate 6 is disposed at at least one end of the rotor 2 along the axial direction, and the rotor 2 abuts against the rotor magnetic shielding plate 6. For example, the rotor magnetic shielding plate 6 is disposed at both ends of the rotor 2 along the axial direction, and the rotor magnetic shielding plate 6 is fixed to the rotating shaft 7. The rotor magnetic shielding plate 6 has a magnetic shielding plate shaft hole 62 that extends through the rotor magnetic shielding plate 6 along the thickness direction of the rotor magnetic shielding plate 6. The rotating shaft 7 passes through the magnetic shielding plate shaft hole 62 along the axial direction. Therefore, the rotor magnetic shielding plate 6 is not easy to detach from the rotating shaft 7 in the radial direction, which helps to ensure that the rotor magnetic shielding plate 6 can be better fixed to the rotating shaft 7.

[0102] In some embodiments of the present invention, reference is made to... Figures 1-2 , Figures 13-14 As shown, the rotating shaft 7 has a rotating shaft flange 73. The outer diameter of the rotating shaft flange 73 is larger than the diameter of the magnetic shielding plate shaft hole 62. Therefore, the rotating shaft flange 73 can be used to axially limit the rotor magnetic shielding plate 6 at the lower end, so that the rotor 2 is accurately positioned on the rotating shaft 7.

[0103] According to one embodiment of the present invention, the motor 10 includes a housing, a radial stator 4 (radial stator core 41, radial stator winding 42), a rotor 2 (rotor core, permanent magnet 23), a magnetic adjustment assembly 3, a rotating shaft 7, a system flow path, and a rotor magnetic shielding plate 6. The magnetic adjustment assembly 3 includes a magnetic guide block 31, an elastic element 32, and a magnetic adjustment housing 33. The magnetic adjustment housing 33 includes an inlet 331 and a magnetic adjustment cavity 332, and the magnetic adjustment cavity 332 accommodates the magnetic guide block 31 and the elastic element 32. The space between the magnetic guide block 31 and the inner wall of the magnetic adjustment housing 33 constitutes at least a portion of the magnetic adjustment flow path 30. The rotating shaft 7 has a cylindrical structure. One end of the rotating shaft 7 is a rotating shaft cavity 71, and the other end is solid. The rotating shaft 7 is provided with a number of rotating shaft through holes 72, which connect the rotating shaft cavity 71 inside the rotating shaft 7 and the outer surface of the rotating shaft 7. The rotating shaft flow path 70 includes the axial rotating shaft cavity 71 and the radial rotating shaft through holes 72 inside the rotating shaft 7.

[0104] The rotor core is formed by stacking several layers of rotor laminations 21 (thin sheets of soft magnetic material); the rotor laminations 21 are provided with rotor shaft holes 211, magnetizing slots 212, magnet slots 213, and flow path slots; adjacent poles of the rotor laminations 21 are alternately provided with first flow path slots 2141 and second flow path slots 2142; the first flow path slots 2141 include multiple first sub-slots, which are distributed radially along the rotor laminations 21, with the first sub-slot located at the innermost radial end connecting to the shaft flow path 70, and the first sub-slot located at the outermost radial end connecting to the magnetizing flow path 30; the rotor core is formed by axially stacking the rotor laminations 21. The rotor core is divided into several core segments. Two adjacent core segments are circumferentially offset by one rotor magnetic pole, so that the first flow path groove 2141 and the second flow path groove 2142 are alternately arranged in the axial direction of the rotor core. In axial view, the first flow path groove 2141 on one core segment and the second flow path groove 2142 on the adjacent core segment have a certain overlapping area. Multiple first sub-grooves on one core segment are radially connected through the second flow path groove 2142 on the adjacent core segment. The rotor flow path 20 is composed of the first flow path groove 2141 and the second flow path groove 2142 of the rotor lamination 21.

[0105] The motor 10 according to an embodiment of the present invention is a rotor variable flux motor, which simultaneously possesses a composite magnetic adjustment capability of active magnetic adjustment (hydraulic or pneumatic) and centrifugal passive magnetic adjustment. In some embodiments, the magnetic adjustment component 3 includes a magnetic guide block 31 and an elastic element 32. When the motor 10 does not adjust the magnetic flux, the magnetic guide block 31 is located on one side of the magnetic pole under the action of the elastic element 32, offset from the center line m of the magnetic pole, such as... Figure 5 As shown, the system flow path of the motor 10 consists of the shaft cavity 71, the shaft through hole 72, the flow path groove of the rotor 2, and the magnetic adjustment flow path 30. The medium (e.g., hydraulic oil) passes through the above flow paths in sequence.

[0106] When the motor 10 is magnetically adjusted, the hydraulic module activates, and hydraulic oil flows through the system path. The system path closes to form a circulation, and the oil pushes the magnetic guide block 31 to overcome the resistance of the elastic element 32. The magnetic guide block 31 moves circumferentially along the rotor 2 and eventually stabilizes at the exact center of the magnetic pole. At this time, the magnetic guide block 31 is symmetrical about the center line m of the magnetic pole, as shown below. Figure 6 As shown. When the magnetic guide block 31 moves under hydraulic drive, a portion of the main magnetic flux is short-circuited through the magnetic guide block 31. As the moving distance of the magnetic guide block 31 increases, the short-circuited portion gradually increases, thereby realizing the variable magnetic flux of the motor 10.

[0107] The motor 10 of this invention achieves composite magnetization through a combination of hydraulic and centrifugal forces, adding an active magnetization function to the passive magnetization process. Furthermore, for electric / hybrid vehicles 100, the oil can be reused for both cooling and hydraulic processes, eliminating the need for additional mechanical energy and allowing for real-time optimization of the system's operating point based on working conditions, thereby improving system efficiency.

[0108] The rotor core is formed by axially stacking rotor laminations 21. The rotor laminations 21 have magnet slots 213, magnet adjustment slots 212 and flow path slots. The magnet adjustment slots 212 are located under each magnetic pole near the rotor shaft hole 211 and extend to one side in the circumferential direction. The flow path slots are offset on one side of the magnetic pole. The magnet slots 213, magnet adjustment slots 212 and flow path slots are arranged in the radial direction from the outside to the inside.

[0109] The rotor core is axially divided into several core segments. Each core segment is obtained by rotating an adjacent core segment axially by 360° / 2 / p along the circumference of the rotor 2, where p is the number of magnetic poles of the rotor 2. Looking along the axial direction, the first flow path groove 2141 and the second flow path groove 2142 are alternately arranged under each magnetic pole, and the shaft through hole 72 corresponds to the position of the first flow path groove 2141. When the motor 10 adjusts the magnetism, hydraulic oil enters the first flow path groove 2141 through the shaft through hole 72, flows into the second flow path groove 2142 through the overlapping portion of the first and second flow path grooves 2141, and so on, eventually reaching the magnetism adjustment component 3 through the first flow path groove 2141, forming oil pressure, and pushing the magnetic guide block 31 to overcome the elastic element 32 and move to the target position. According to the working conditions, the position (i.e., the moving distance) of the magnetic guide block 31 can be adjusted in real time to achieve the adjustment of the short-circuit magnetic flux, thereby achieving effective adjustment of the main air gap magnetic flux.

[0110] The motor 10 according to an embodiment of the present invention can realize the permanent magnet magnetic field adjustment function, combining the advantages of constant torque region and constant power region. While ensuring high torque density and power density, it effectively expands the constant power operation region and high efficiency region. By setting the magnetic adjustment component 3, additional magnetic adjustment degree of freedom is introduced, which helps to reduce the dependence on armature direct shaft weak magnetic current in the medium and high speed region, thereby helping to reduce the risk of irreversible demagnetization of the magnet.

[0111] Reference Figure 16As shown, an electric drive system 90 according to another embodiment of the present invention includes the motor 10 of the above embodiment. Optionally, the electric drive system 90 may be a suspension system, a braking system, or other system that requires the use of the motor 10.

[0112] Reference Figure 17 As shown, a vehicle 100 according to another embodiment of the present invention includes the electric drive system 90 of the above embodiment.

[0113] According to the vehicle 100 of the present invention, the motor 10 can actively adjust the relative position of the magnetic poles of the magnetic adjustment component 3 and the rotor 2 by adjusting the medium in the magnetic adjustment flow path 30, thereby realizing the effective adjustment of the working magnetic field of the motor 10, and having good controllability, and having low space requirements for the motor 10.

[0114] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0115] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0116] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0117] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric motor (10), characterized in that, include: Rotor (2); and A magnetic adjustment component (3) is disposed on the rotor (2). The magnetic adjustment component (3) has a magnetic adjustment flow path (30). The amount of medium in the magnetic adjustment flow path (30) is adjustable to change the relative position of the magnetic poles of the magnetic adjustment component (3) and the rotor (2).

2. The motor (10) according to claim 1, characterized in that, The magnetic adjustment component (3) includes a magnetic guide block (31) which is capable of reciprocating relative to the rotor (2).

3. The motor (10) according to claim 2, characterized in that, The magnetic block (31) is capable of reciprocating along the circumference of the rotor (2) relative to the rotor (2).

4. The motor (10) according to claim 3, characterized in that, The rotor (2) has multiple magnetic poles, and the magnetic adjustment component (3) spans the center line of the magnetic poles.

5. The motor (10) according to any one of claims 1-4, characterized in that, The rotor (2) is provided with a magnetic adjustment groove (212), and the magnetic adjustment component (3) is located in the magnetic adjustment groove (212).

6. The motor (10) according to any one of claims 5, characterized in that, The magnetic adjustment component (3) includes a magnetic guide block (31) and an elastic element (32), one end of the elastic element (32) is connected to the magnetic guide block (31), and the other end of the elastic element (32) is fixed relative to the rotor (2).

7. The motor (10) according to claim 6, characterized in that, The elastic element (32) may have a first state in which the magnetic flow path (30) has a first amount of medium so that the magnetic block (31) is in a first position. The elastic element (32) may have a second state in which the magnetic flow path (30) has a second medium quantity so that the magnetic block (31) is in a second position; The elastic element (32) may have a third state in which the magnetic flow path (30) has a third medium quantity so that the magnetic block (31) is in a third position; The distances of the first position, the second position, and the third position relative to the magnetic poles of the rotor (2) increase from near to far.

8. The motor (10) according to claim 6, characterized in that, The magnetic adjustment assembly (3) further includes: a magnetic adjustment housing (33), which is installed in the magnetic adjustment groove (212), one end of the elastic member (32) is connected to the magnetic guide block (31), and the other end of the elastic member (32) is connected to the magnetic adjustment housing (33).

9. The motor (10) according to claim 8, characterized in that, The magnetic adjustment housing (33) has a magnetic adjustment cavity (332) inside, the magnetic adjustment flow path (30) is formed inside the magnetic adjustment housing (33), the magnetic adjustment housing (33) is provided with an inlet (331), the magnetic guide block (31) is disposed inside the magnetic adjustment cavity (332), and the magnetic guide block (31) can reciprocate inside the magnetic adjustment cavity (332).

10. The motor (10) according to any one of claims 1-4, characterized in that, The rotor (2) has a rotor flow path (20), and the magnetizing flow path (30) is connected to the rotor flow path (20).

11. The motor (10) according to any one of claims 1-4, characterized in that, The rotor (2) includes a plurality of rotor laminations (21) stacked axially. Each rotor lamination (21) is provided with a magnetic adjustment groove (212) and a flow path groove. Both the magnetic adjustment groove (212) and the flow path groove penetrate the rotor lamination (21) along the thickness direction. The magnetic adjustment assembly (3) is installed in the magnetic adjustment groove (212). The flow path grooves of the plurality of rotor laminations (21) are connected to form a rotor flow path (20). The rotor flow path (20) is connected to the magnetic adjustment groove (212).

12. The motor (10) according to claim 11, characterized in that, The flow path groove includes a first flow path groove (2141) and a second flow path groove (2142). The rotor (2) includes multiple core segments. Each core segment includes one rotor lamination (21) or multiple rotor laminations (21) arranged at the same angle. At least two adjacent core segments are staggered by a preset angle in the circumferential direction so that the first flow path groove (2141) of one core segment is connected to the second flow path groove (2142) of the adjacent core segment in both the axial and radial directions.

13. The motor (10) according to claim 12, characterized in that, The rotor lamination (21) is provided with a rotor shaft hole (211) through which the rotating shaft (7) passes. The first flow path groove (2141) includes a plurality of first sub-grooves. The plurality of first sub-grooves are dispersed radially along the rotor lamination (21). The first sub-grooves located at the innermost radial end are connected to the rotor shaft hole (211), and the first sub-grooves located at the outermost radial end are connected to the magnetic adjustment groove (212). The second flow path groove (2142) is adapted to be separated from both the magnetic adjustment groove (212) and the rotor shaft hole (211). The second flow path groove (2142) is used to connect different first sub-grooves on adjacent core segments.

14. The motor (10) according to claim 12, characterized in that, The first flow path groove (2141) and the second flow path groove (2142) are arranged alternately along the circumference of the rotor lamination (21).

15. The motor (10) according to claim 14, characterized in that, The first flow path groove (2141) and the second flow path groove (2142) are evenly and alternately arranged, and the preset angle is equal to the central angle formed between the first flow path groove (2141) and the second flow path groove (2142).

16. The motor (10) according to any one of claims 1-4, characterized in that, The motor (10) also includes a rotating shaft (7) having a rotating shaft flow path (70), the rotor (2) being mounted on the rotating shaft (7) having a rotor flow path (20), and the rotating shaft flow path (70) and the magnetic adjustment flow path (30) being connected through the rotor flow path (20).

17. The motor (10) according to claim 16, characterized in that, The shaft flow path (70) includes a shaft cavity (71) and a shaft through hole (72) disposed on the shaft (7). The shaft cavity (71) has an inlet end. The shaft through hole (72) connects the shaft cavity (71) and the outer peripheral surface of the shaft (7). The shaft through hole (72) is connected to the rotor flow path (20).

18. The motor (10) according to any one of claims 1-4, characterized in that, The motor (10) also includes a rotor magnetic shield (6), which is disposed at at least one end of the rotor (2) along the axial direction, and the rotor (2) abuts against the rotor magnetic shield (6).

19. An electric drive system, characterized in that, The motor (10) includes any one of claims 1-18.

20. A vehicle (100), characterized in that, Includes the electric drive system as described in claim 19.

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