Motor rotor, motor and vehicle

Abstract

This application discloses a motor rotor, a motor, and a vehicle, belonging to the field of new energy vehicle technology. The motor rotor includes a first rotor and a second rotor distributed sequentially from the outside to the inside along the radial direction of the motor rotor; the first rotor has a plurality of first magnets and a plurality of second magnets; the plurality of first magnets and the plurality of second magnets are all spaced apart along the circumferential direction of the first rotor; the plurality of first magnets are divided into a plurality of magnet groups, and a magnet group contains at least two consecutively distributed first magnets; in the circumferential direction of the first rotor, a magnet group is distributed between any two adjacent second magnets, and a second magnet is distributed between any two adjacent magnet groups; the second rotor has a plurality of third magnets spaced apart along the circumferential direction of the second rotor; the second rotor is capable of rotating relative to the first rotor to a first state or a second state.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a motor rotor, a motor, and a vehicle. Background Technology

[0002] In a radial flux motor, the stator, outer rotor, and inner rotor are arranged sequentially from the outside to the inside. The outer rotor is located between the inner rotor and the stator.

[0003] The outer rotor typically employs a technique that increases the width of the magnetic isolation bridge between its permanent magnets to provide radial magnetic circuit space for the inner rotor. However, increasing the width of the magnetic isolation bridge increases the risk of magnetic leakage from the permanent magnets on the inner rotor, thus making the motor more prone to magnetic leakage. Summary of the Invention

[0004] This application provides an embodiment of a motor rotor, a motor, and a vehicle. It can solve the problem of magnetic leakage in motors in related technologies. The technical solution is as follows:

[0005] On one hand, embodiments of this application provide a motor rotor, including: a first rotor and a second rotor distributed sequentially from the outside to the inside along the radial direction of the motor rotor;

[0006] The first rotor has a plurality of first magnets and a plurality of second magnets; the plurality of first magnets and the plurality of second magnets are all spaced apart along the circumferential direction of the first rotor; the plurality of first magnets are divided into a plurality of magnet groups, and a magnet group contains at least two first magnets that are continuously distributed; in the circumferential direction of the first rotor, a magnet group is distributed between any two adjacent second magnets, and a second magnet is distributed between any two adjacent magnet groups;

[0007] The second rotor has a plurality of third magnets spaced apart along the circumferential direction of the second rotor;

[0008] The second rotor is capable of rotating relative to the first rotor to either a first state or a second state. In the first state, in the circumferential direction of the motor rotor, at least a portion of one of the third magnets is located between two adjacent second magnets, and the plurality of third magnets correspond one-to-one with the plurality of magnet groups, with each third magnet and its corresponding magnet group distributed radially on the motor rotor. In the second state, in the circumferential direction of the motor rotor, at least a portion of one of the third magnets is located between two adjacent magnet groups, and the plurality of third magnets correspond one-to-one with the plurality of second magnets, with each third magnet and its corresponding second magnet distributed radially on the motor rotor.

[0009] In some possible implementations, the extension direction of the second magnet is parallel to the radial direction of the motor rotor;

[0010] The number of first magnets in the magnet group is two, and the two first magnets in the same magnet group are respectively: a first sub-magnetic strip and a second sub-magnetic strip; the extension direction of the first sub-magnetic strip and the extension direction of the second sub-magnetic strip intersect in a V-shape; the end of the first sub-magnetic strip and the second sub-magnetic strip in the same magnet group that are close to each other is the first end, and the end that are far away from each other is the second end, and the first end is closer to the second rotor than the second end.

[0011] In some possible implementations, the distance between the end of the second magnet facing the second rotor and the second rotor in the radial direction of the motor rotor is less than the distance between the first end and the second rotor.

[0012] In some possible implementations, the magnetization direction of the first sub-magnetic strip is perpendicular to the extension direction of the first sub-magnetic strip and parallel to the end face of the first rotor; the magnetization direction of the second sub-magnetic strip is perpendicular to the extension direction of the second sub-magnetic strip and parallel to the end face of the first rotor; the magnetization direction of the second magnet is perpendicular to the extension direction of the second magnet and parallel to the end face of the first rotor.

[0013] Wherein, for any one of the second magnets, and the first sub-magnetic strips and the second sub-magnetic strips distributed on both sides of the second magnet, the magnetism of the side of the second magnet facing the first sub-magnetic strip is opposite to the magnetism of the side of the first sub-magnetic strip facing the second magnet, and the magnetism of the side of the second magnet facing the second sub-magnetic strip is opposite to the magnetism of the side of the second sub-magnetic strip facing the second magnet; in the same group of magnets, the magnetism of the side of the first sub-magnetic strip facing the second sub-magnetic strip is opposite to the magnetism of the side of the second sub-magnetic strip facing the first sub-magnetic strip.

[0014] In some possible implementations, the extension direction of the third magnet is parallel to the tangential direction of the second rotor; the magnetization direction of the third magnet is perpendicular to the extension direction of the third magnet and parallel to the end face of the second rotor.

[0015] In some possible implementations, for any two adjacent third magnets, the magnetism of one third magnet facing the first rotor is opposite to the magnetism of the other third magnet facing the first rotor.

[0016] In some possible implementations, the distance between two adjacent second magnets in the circumferential direction of the motor rotor is greater than the extension length of the third magnet; and the width of the second magnet in the circumferential direction of the motor rotor is less than the extension length of the third magnet.

[0017] On the other hand, this application provides an electric motor, which includes a motor stator and the aforementioned motor rotor; the motor stator is spaced and sleeved on the outside of the first rotor away from the second rotor.

[0018] In some possible implementations, the motor further includes: a rotary drive and a rotating shaft; the rotary drive, the rotating shaft, and the motor rotor are coaxially arranged, with the rotary drive located on one side of the motor rotor in the axial direction; one end of the rotating shaft is fixedly connected to the rotary drive, and the other end is fixedly connected to the second rotor.

[0019] In another aspect, embodiments of this application provide a vehicle in which the aforementioned motor is integrated.

[0020] The beneficial effects of the technical solutions provided in this application include at least the following:

[0021] In the first state, at least a portion of a third magnet is located between two adjacent second magnets along the circumferential direction of the motor rotor. Multiple third magnets correspond one-to-one with multiple magnet groups, and each third magnet and its corresponding magnet group are distributed radially along the motor rotor. This provides sufficient magnetic circuit space between adjacent second magnets for the magnetic circuit formed by the third magnet and its corresponding magnet group, thereby increasing the magnetic flux and enhancing the air gap magnetic field strength between the motor stator and rotor. Furthermore, the second magnets between adjacent third magnets can guide or repel magnetic flux passing through them, suppressing leakage flux from the third magnet itself. In the second state, the second magnets can reduce the magnetic circuit space between the third magnets and their magnet groups and limit the magnetic flux passing through them, thus reducing the air gap magnetic flux between the motor rotor and stator compared to the first state. In addition, the air gap magnetic flux of the motor is smaller in the second state and larger in the first state. The relative rotation of the first and second rotors allows the motor rotor to be steplessly adjusted between the first and second states, and the air gap magnetic flux switching is smooth, thus achieving the purpose of adjusting the air gap magnetic flux of the dual rotor motor. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the motor provided in the embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the end face of a motor provided in an embodiment of this application.

[0025] Figure 3 A schematic diagram of the end face of the motor rotor in the second state is shown.

[0026] Figure 4 This is a schematic diagram of the end face of another motor provided in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the end face of a motor in the first state, as provided in an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the end face of a motor in the second state, as provided in an embodiment of this application.

[0029] Figure 7 This is a schematic diagram of another type of motor provided in the embodiments of this application.

[0030] Figure label:

[0031] 000, Motor; 001, Motor stator; 002, Motor rotor;

[0032] 100, First rotor; 101, First magnet; 101a, First sub-magnetic strip; 101b, Second sub-magnetic strip; D1, First end; D2, Second end; 102, Second magnet; G, Magnet assembly; K, Shaft hole;

[0033] 200. Second rotor; 201. Third magnet;

[0034] 300. Rotary drive component;

[0035] 400. Shaft;

[0036] C1, first magnetic circuit; C2, second magnetic circuit; C3, third magnetic circuit. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0038] The motors in new energy vehicles can be permanent magnet synchronous motors (PMSMs). These PMSMs include a rotor and a stator nested together, spaced radially apart. The stator is the fixed part of the motor, including a stator core and stator windings embedded in it. The rotor is the rotating part, including a rotor core, permanent magnets nested on the rotor core, and a shaft fixed to the rotor core. When three-phase symmetrical alternating current is applied to the stator windings, a rotating magnetic field is formed around the stator core. At this time, the inherent magnetic field generated by the permanent magnets on the rotor and the rotating magnetic field of the stator create electromagnetic attraction and repulsion, driving the rotor to rotate synchronously at the same speed as the stator's rotating magnetic field. Power is then transmitted to the vehicle's wheel hubs through the shaft, enabling the vehicle to move.

[0039] In a dual-rotor motor, the stator, outer rotor, and inner rotor are arranged radially from the outside to the inside. Related technologies employ methods such as increasing the width of the magnetic isolation bridge between permanent magnets on the outer rotor (i.e., increasing the spacing between adjacent permanent magnets on the outer rotor) to provide magnetic path space for the radial magnetic circuits formed by the inner rotor, outer rotor, and stator. However, increasing the width of the magnetic isolation bridge increases the risk of magnetic leakage from the permanent magnets on the inner rotor, thus making the motor more prone to magnetic leakage.

[0040] This application provides an electric motor and an electric motor rotor. Figure 1 This is a schematic diagram of the motor structure provided in an embodiment of this application. For example... Figure 1 As shown, the motor 000 includes a motor stator 001 and a motor rotor 002. The motor stator 001 is spaced and sleeved on the outside of the motor rotor 002. That is, the motor 000 in this embodiment is a radial flux motor. The motor rotor 002 may include a first rotor 100 and a second rotor 200 distributed sequentially from the outside to the inside along the radial direction of the motor rotor 002. Here, the first rotor 100, the second rotor 200, and the motor stator 001 are arranged coaxially.

[0041] Figure 2 This is a schematic diagram of the end face of a motor provided in an embodiment of this application. Please refer to... Figure 1 and Figure 2 The first rotor 100 may have multiple first magnets 101 and multiple second magnets 102. Here, the first magnets 101 and the second magnets 102 are two different magnets, and the first magnets 101 and the second magnets 102 may differ in shape, size, or magnetization direction. For example, the first magnets 101 and the second magnets 102 may be magnetic steel or permanent magnets. The first rotor 100 may be a rotor core.

[0042] Multiple first magnets 101 and multiple second magnets 102 are distributed at intervals along the circumferential direction of the first rotor 100. Here, there is an interval between any two adjacent first magnets 101 and between any two adjacent first magnets 101 and second magnets 102, so that magnetic isolation bridges are formed between the first magnets 101 and between the first magnets 101 and second magnets 102.

[0043] Multiple first magnets 101 are divided into multiple magnet groups G, and each magnet group G contains at least two first magnets 101 that are continuously distributed. Here, continuous distribution means that at least two first magnets 101 are spaced apart and there are no second magnets 102. In the circumferential direction of the first rotor 100, a magnet group G is distributed between any two adjacent second magnets 102, and a second magnet 102 is distributed between any two adjacent magnet groups G. That is, the magnet groups G and the second magnets 102 are arranged in an alternating "ababab" pattern.

[0044] The second rotor 200 may have a plurality of third magnets 201 spaced apart along the circumferential direction of the second rotor 200. Here, there is a gap between any two adjacent third magnets 201, such that the portion of the second rotor 200 between two adjacent third magnets 201 forms a magnetic isolation bridge between the two adjacent third magnets 201. Exemplarily, the third magnets 201 can be magnets or permanent magnets. The second rotor 200 can be a rotor core.

[0045] The second rotor 200 can rotate relative to the first rotor 100 to either a first state or a second state. Figure 2 A schematic diagram of the end face of the motor rotor 002 in its first state is also shown. Figure 2 As shown, in the first state, at least a portion of a third magnet 201 is located between two adjacent second magnets 102 in the circumferential direction of the motor rotor 002. Multiple third magnets 201 correspond one-to-one with multiple magnet groups G, and each third magnet 201 and its corresponding magnet group G are distributed radially on the motor rotor 002. Thus, the space between two adjacent second magnets 102 provides sufficient magnetic path space for the magnetic circuit formed by the third magnet 201 and its corresponding magnet group G. Furthermore, the second magnets 102, positioned between two adjacent third magnets 201, can guide or repel magnetic flux passing through the third magnet 201, suppressing magnetic leakage from the third magnet 201 itself.

[0046] Figure 3 A schematic diagram of the end face of the motor rotor 002 in its second state is shown. Figure 3As shown, in the second state, at least a portion of a third magnet 201 is located between two adjacent magnet groups G in the circumferential direction of the motor rotor 002. Multiple third magnets 201 correspond one-to-one with multiple second magnets 102, and each third magnet 201 and its corresponding second magnet 102 are distributed radially on the motor rotor 002. In this way, the second magnet 102 can reduce the magnetic circuit space between the third magnet 201 and the magnet group G, and limit the magnetic flux passing through the third magnet 201, thereby reducing the air gap magnetic flux between the motor rotor 002 and the motor stator 001 compared to the first state, achieving the purpose of changing the air gap magnetic flux of the motor 000.

[0047] In summary, in the first state, at least a portion of a third magnet is located between two adjacent second magnets along the circumferential direction of the motor rotor. Multiple third magnets correspond one-to-one with multiple magnet groups, and each third magnet and its corresponding magnet group are distributed radially along the motor rotor. This provides sufficient magnetic circuit space between adjacent second magnets for the magnetic circuit formed by the third magnet and its corresponding magnet group, thereby increasing the magnetic flux and enhancing the air gap magnetic field strength between the motor stator and rotor. Furthermore, the second magnets between adjacent third magnets can guide or repel magnetic flux passing through them, suppressing leakage flux from the third magnet itself. In the second state, the second magnets can reduce the magnetic circuit space between the third magnet and the magnet group, and limit the magnetic flux passing through the third magnet, thus reducing the air gap magnetic flux between the motor rotor and stator compared to the first state. In addition, the air gap magnetic flux of the motor is smaller in the second state and larger in the first state. The relative rotation of the first and second rotors allows the motor rotor to be steplessly adjusted between the first and second states, and the air gap magnetic flux switching is smooth, thus achieving the purpose of adjusting the air gap magnetic flux of the dual rotor motor.

[0048] Figure 4 This is a schematic diagram of the end face of another motor provided in an embodiment of this application. For example... Figure 4 As shown, in some possible implementations, the extension direction of the second magnet 102 is parallel to the radial direction of the motor rotor 002. Here, the extension line of the central axis of the second magnet 102 coincides with the central axis of the motor rotor 002, and the length direction of the second magnet 102 extends along the radial direction of the motor rotor 002.

[0049] There are two first magnets 101 in the magnet group G. The two first magnets 101 in the same magnet group G are a first sub-magnetic strip 101a and a second sub-magnetic strip 101b. The extension direction of the first sub-magnetic strip 101a and the extension direction of the second sub-magnetic strip 101b intersect in a V-shape. The ends of the first sub-magnetic strips 101a and 101b in the same magnet group G that are closer to each other are called the first end D1, and the ends that are farther apart are called the second end D2. The first end D1 is closer to the second rotor 200 than the second end D2. The V-shaped distribution of the first sub-magnetic strips 101a and 101b can more effectively guide the magnetic flux to the air gap between the motor stator 001 and the motor rotor 002, thereby significantly enhancing the air gap magnetic field strength.

[0050] Thus, the second magnet 102 extends radially along the motor rotor 002. In the first state, the V-shaped magnet group G and the third magnet 201 are located between two adjacent second magnets 102. The radially extending second magnet 102 can provide a larger magnetic circuit space for the V-shaped magnet group G and the third magnet 201. Moreover, the radial extension of the second magnet 102 along the motor rotor 002 can provide a larger magnetic repulsion range or magnetic attraction range, suppressing magnetic leakage of the first magnet 101 and the third magnet 201. For example, in the first state, with the same magnet group G as a reference, the magnetic poles of the third magnet 201 near the magnet group G repel the magnetic poles of the second magnet 102 near the magnet group G. The radial extension of the second magnet 102 along the motor rotor 002 can increase the magnetic repulsion range, thereby suppressing magnetic leakage of the third magnet 201. For example, in the first state, the magnetic pole of the second magnet 102 on the side near the magnet group G attracts the magnetic pole of the magnet group G on the side near the second magnet 102. The second magnet 102 extends radially along the motor rotor 002, which can increase the magnetic attraction range of the second magnet 102, guide the magnetic flux flow of the first magnet 101, and the second magnet 102 and the first magnet 101 together form a magnetic circuit, thereby suppressing the leakage of magnetic flux from the first magnet 101.

[0051] In some embodiments, within the same magnet group G, the first sub-magnetic strip 101a and the second sub-magnetic strip 101b are symmetrically distributed, and the axis of symmetry of the first sub-magnetic strip 101a and the second sub-magnetic strip 101b is parallel to the radial direction of the motor rotor 002. This further guides the magnetic flux flow, suppresses magnetic leakage, and enhances the air gap magnetic field strength.

[0052] Continue to refer to Figure 4As shown, in some possible implementations, the distance between the end of the second magnet 102 facing the second rotor 200 and the second rotor 200 in the radial direction of the motor rotor 002 is smaller than the distance between the first end D1 and the second rotor 200. This relatively small distance between the second magnet 102 and the second rotor 200 enhances the suppression effect of the second magnet 102 on the leakage flux of the third magnet 201 on the second rotor 200. Furthermore, the second magnet 102 can effectively guide the magnetic flux of the magnet group G, further enhancing the suppression effect on the leakage flux of the magnet group G.

[0053] Figure 5 This is a schematic diagram of the end face of a motor in the first state, as provided in an embodiment of this application. Figure 6 This is a schematic diagram of the end face of a motor in a second state, as provided in an embodiment of this application. Figures 5-6 As shown, in some possible implementations, the magnetization direction of the first sub-magnetic strip 101a is perpendicular to its extension direction and parallel to the end face of the first rotor 100. The magnetization direction of the second sub-magnetic strip 101b is perpendicular to its extension direction and parallel to the end face of the first rotor 100. The magnetization direction of the second magnet 102 is perpendicular to its extension direction and parallel to the end face of the first rotor 100. Here, the magnetization direction refers to the arrangement direction of two magnetic poles with opposite polarities on the magnet.

[0054] Specifically, for any one of the second magnets 102, and the first sub-magnetic strips 101a and 101b distributed on both sides of the second magnet 102, the magnetism of the side of the second magnet 102 facing the first sub-magnetic strip 101a is opposite to the magnetism of the side of the first sub-magnetic strip 101a facing the second magnet 102, and the magnetism of the side of the second magnet 102 facing the second sub-magnetic strip 101b is opposite to the magnetism of the side of the second sub-magnetic strip 101b facing the second magnet 102. In the same magnet group G, the magnetism of the side of the first sub-magnetic strip 101a facing the second sub-magnetic strip 101b is opposite to the magnetism of the side of the second sub-magnetic strip 101b facing the first sub-magnetic strip 101a. It can be understood that the magnetism on both sides of the second magnet 102 in the magnetization direction can be interchanged, and correspondingly, the magnetism on both sides of the first sub-magnetic strips 101a and 101b in the magnetization direction is also interchanged. For example, as... Figure 5As shown, in the same magnet group G, the magnetic pole of the first sub-magnetic strip 101a facing the second sub-magnetic strip 101b is the S pole, and the magnetic pole of the side of the first sub-magnetic strip 101a away from the second sub-magnetic strip 101b is the N pole. The magnetic pole of the side of the second sub-magnetic strip 101b facing the first sub-magnetic strip 101a is the N pole, and the magnetic pole of the side of the second sub-magnetic strip 101b away from the first sub-magnetic strip 101a is the S pole. The magnetic pole of the second magnet 102 near the second sub-magnetic strip 101b is the N pole, and the magnetic pole of the side of the second magnet 102 near the first sub-magnetic strip 101a is the S pole.

[0055] Thus, with a reference to the same second magnet 102, at least a portion of the second magnet 102 and the first sub-magnetic strips 101a and 101b adjacent to both sides of the second magnet 102 form a first magnetic circuit C1. In the first state, with a reference to the same second magnet 102, the first sub-magnetic strips 101a and 101b adjacent to both sides of at least a portion of the second magnet 102, and two third magnets 201 adjacent to both sides of at least a portion of the second magnet 102 form a second magnetic circuit C2. The space between two adjacent second magnets 102 can provide sufficient magnetic circuit space for the third magnets 201. The second magnets 102 can provide magnetic space between two adjacent third magnets 201, suppressing magnetic leakage from the gap between the two third magnets 201. In the second state, with reference to the same magnet group G, at least a portion of the first sub-magnetic strip 101a, the second sub-magnetic strip 101b in the magnet group G, and two third magnets 201 adjacent to the magnet group G form a third magnetic circuit C3.

[0056] Continue to refer to Figure 5 In some possible implementations, the extension direction of the third magnet 201 is parallel to the tangential direction of the second rotor 200. The magnetization direction of the third magnet 201 is perpendicular to its extension direction and parallel to the end face of the second rotor 200. Thus, the second magnetic circuit C2 passes radially through the third magnet 201 along the motor rotor 002 and flows towards the magnet group G. It is understood that the third magnet 201 can also adopt a distribution similar to that of the magnet group G; that is, the third magnet 201 may include two sub-magnetic strips arranged in a V-shape.

[0057] Continue to refer to Figure 5 In some possible implementations, for any two adjacent third magnets 201, the magnetism of one third magnet 201 facing the first rotor 100 is opposite to the magnetism of the other third magnet 201 facing the first rotor 100. In this way, the magnetic poles on both sides of the magnetization direction of the second magnet 102 can respectively suppress the leakage of magnetic flux from the gap between the two adjacent third magnets 201.

[0058] like Figure 5and Figure 6 As shown, in some possible implementations, the distance between two adjacent second magnets 102 in the circumferential direction of the motor rotor 002 is greater than the extension length of the third magnet 201. Thus, in the first state, in the circumferential direction of the motor rotor 002, the third magnet 201 can have two gaps on each side of the adjacent two second magnets 102. This ensures that the third magnet 201 is completely positioned between the two adjacent second magnets 102, thereby providing sufficient magnetic path space for the magnetic path between the third magnet 201 and the magnet group G, preventing the second magnet 102 from interfering with the magnetic flux through the second magnetic path C2 passing through the third magnet 201.

[0059] In the circumferential direction of the motor rotor 002, the width of the second magnet 102 is smaller than the extension length of the third magnet 201. Thus, in the second state, in the circumferential direction of the motor rotor 002, the two sides of the third magnet 201 protrude from the corresponding two sides of the second magnet 102, so that the portion of the third magnet 201 protruding from the second magnet 102 can form a third magnetic circuit C3 with the magnet assembly G.

[0060] Figure 7 This is a schematic diagram of another type of motor provided in an embodiment of this application. For example... Figure 1 and Figure 7 As shown, in some possible implementations, the motor 000 may further include a rotary drive 300 and a shaft 400. The rotary drive 300, the shaft 400, and the motor rotor 002 are coaxially arranged, with the rotary drive 300 located on one axial side of the motor rotor 002. One end of the shaft 400 is fixedly connected to the rotary drive 300, and the other end is fixedly connected to the second rotor 200.

[0061] In this way, the rotary drive 300 can drive the second rotor 200 to rotate relative to the first rotor 100 via the rotating shaft 400, thereby changing the relative angle between the first rotor 100 and the second rotor 200 and adjusting the air gap magnetic flux. The rotary drive 300 and the rotating shaft 400 have a simple structure and reliable control.

[0062] In some embodiments, the rotary drive 300 can be a speed-regulating motor. By utilizing the speed-regulating motor to control the relative angle between the second rotor 200 and the first rotor 100, stepless adjustment of the magnetic flux can be achieved. This method is simple in structure, reliable in control, and possesses high adaptability to various operating conditions and high operational efficiency. For example, in normal operating mode, the speed-regulating motor controls the rotational speed of the second rotor 200, ensuring that the second rotor 200 and the first rotor 100 operate synchronously at the same speed, thus maintaining a stable magnetic circuit coupling state for the motor rotor 002. When it is necessary to adjust the air gap magnetic flux of the motor 000, the speed-regulating motor drives the second rotor 200 to accelerate or decelerate, generating a controllable relative angular displacement between the second rotor 200 and the first rotor 100. Once the target air gap magnetic flux value is reached, the speed-regulating motor readjusts its speed, restoring the second rotor 200 to synchronous operation with the first rotor 100, thereby achieving magnetic flux adjustment.

[0063] In summary, in the first state, at least a portion of a third magnet is located between two adjacent second magnets along the circumferential direction of the motor rotor. Multiple third magnets correspond one-to-one with multiple magnet groups, and each third magnet and its corresponding magnet group are distributed radially along the motor rotor. This provides sufficient magnetic circuit space between adjacent second magnets for the magnetic circuit formed by the third magnet and its corresponding magnet group, thereby increasing the magnetic flux and enhancing the air gap magnetic field strength between the motor stator and rotor. Furthermore, the second magnets between adjacent third magnets can guide or repel magnetic flux passing through them, suppressing leakage flux from the third magnet itself. In the second state, the second magnets can reduce the magnetic circuit space between the third magnet and the magnet group, and limit the magnetic flux passing through the third magnet, thus reducing the air gap magnetic flux between the motor rotor and stator compared to the first state. In addition, the air gap magnetic flux of the motor is smaller in the second state and larger in the first state. The relative rotation of the first and second rotors allows the motor rotor to be steplessly adjusted between the first and second states, and the air gap magnetic flux switching is smooth, thus achieving the purpose of adjusting the air gap magnetic flux of the dual rotor motor.

[0064] On the other hand, this application embodiment also provides a vehicle in which the aforementioned motor is integrated. Exemplarily, the output end of the motor's first rotor is connected to the vehicle's transmission system to drive the vehicle. The rotational speed of the first rotor dynamically changes according to the vehicle's actual operating conditions (such as load, vehicle speed, etc.). The speed-regulating motor, as the driving and control component for the second rotor, can detect the rotational speed signal of the second rotor in real time and drive the second rotor through a shaft, causing the second rotor to run at the same speed as the first rotor or to rotate relative to the first rotor, thereby adjusting the air gap magnetic flux.

[0065] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0066] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A motor rotor, characterized in that, include: The first rotor and the second rotor are distributed sequentially from the outside to the inside along the radial direction of the motor rotor; The first rotor has a plurality of first magnets and a plurality of second magnets; the first magnets and the second magnets are distributed at intervals along the circumference of the first rotor; the plurality of first magnets are divided into a plurality of magnet groups, each magnet group containing at least two first magnets distributed in succession; in the circumference of the first rotor, a magnet group is distributed between any two adjacent second magnets, and a second magnet is distributed between any two adjacent magnet groups; The second rotor has a plurality of third magnets spaced apart along its circumference; The second rotor is capable of rotating relative to the first rotor to a first state or a second state; in the first state, in the circumferential direction of the motor rotor, at least a portion of one of the third magnets is located between two adjacent second magnets, the third magnets correspond one-to-one with the magnet groups, and each third magnet and its corresponding magnet group are radially distributed in the motor rotor; in the second state, in the circumferential direction of the motor rotor, at least a portion of one of the third magnets is located between two adjacent magnet groups, the third magnets correspond one-to-one with the second magnets, and each third magnet and its corresponding second magnet are radially distributed in the motor rotor.

2. The motor rotor according to claim 1, characterized in that, The extension direction of the second magnet is parallel to the radial direction of the motor rotor; The number of first magnets in the magnet group is two, and the two first magnets in the same magnet group are respectively: a first sub-magnetic strip and a second sub-magnetic strip; the extension direction of the first sub-magnetic strip and the extension direction of the second sub-magnetic strip intersect in a V-shape; the end of the first sub-magnetic strip and the second sub-magnetic strip in the same magnet group that are close to each other is the first end, and the end that are far away from each other is the second end, and the first end is closer to the second rotor than the second end.

3. The motor rotor according to claim 2, characterized in that, In the radial direction of the motor rotor, the distance between the end of the second magnet facing the second rotor and the second rotor is less than the distance between the first end and the second rotor.

4. The motor rotor according to claim 2, characterized in that, The magnetization direction of the first sub-magnetic strip is perpendicular to the extension direction of the first sub-magnetic strip and parallel to the end face of the first rotor; the magnetization direction of the second sub-magnetic strip is perpendicular to the extension direction of the second sub-magnetic strip and parallel to the end face of the first rotor; the magnetization direction of the second magnet is perpendicular to the extension direction of the second magnet and parallel to the end face of the first rotor. Wherein, for any one of the second magnets, and the first sub-magnetic strips and the second sub-magnetic strips distributed on both sides of the second magnet, the magnetism of the side of the second magnet facing the first sub-magnetic strip is opposite to the magnetism of the side of the first sub-magnetic strip facing the second magnet, and the magnetism of the side of the second magnet facing the second sub-magnetic strip is opposite to the magnetism of the side of the second sub-magnetic strip facing the second magnet; in the same group of magnets, the magnetism of the side of the first sub-magnetic strip facing the second sub-magnetic strip is opposite to the magnetism of the side of the second sub-magnetic strip facing the first sub-magnetic strip.

5. The motor rotor according to any one of claims 2 to 4, characterized in that, The extension direction of the third magnet is parallel to the tangential direction of the second rotor; the magnetization direction of the third magnet is perpendicular to the extension direction of the third magnet and parallel to the end face of the second rotor.

6. The motor rotor according to claim 5, characterized in that, For any two adjacent third magnets, the magnetism of one third magnet facing the first rotor is opposite to the magnetism of the other third magnet facing the first rotor.

7. The motor rotor according to claim 5, characterized in that, In the circumferential direction of the motor rotor, the distance between two adjacent second magnets is greater than the extension length of the third magnet; in the circumferential direction of the motor rotor, the width of the second magnet is less than the extension length of the third magnet.

8. An electric motor, characterized in that, include: The motor stator and the motor rotor according to any one of claims 1-7; the motor stator is spaced and sleeved on the outside of the first rotor away from the second rotor.

9. The motor according to claim 8, characterized in that, The motor further includes: a rotary drive component and a rotating shaft; the rotary drive component, the rotating shaft, and the motor rotor are coaxially arranged, and the rotary drive component is located on one side of the motor rotor in the axial direction; one end of the rotating shaft is fixedly connected to the rotary drive component, and the other end is fixedly connected to the second rotor.

10. A vehicle, characterized in that, The vehicle is equipped with the motor described in claim 8 or 9.

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