Rotor topology, drive motor rotor and motor for new energy vehicles

Abstract

This invention provides a rotor topology, a drive motor rotor, and a motor for new energy vehicles. The rotor topology includes multiple rotor laminations stacked coaxially. Each rotor lamination has a first magnet slot, a second magnet slot, and a third magnet slot arranged radially. A first magnet and a first parallel magnetic bridge are also present, with the first magnet passing through the first magnet slot and the first parallel magnetic bridge positioned on the first magnet. A second magnet and a second parallel magnetic bridge are also present, with the second magnet passing through the second magnet slot and the second parallel magnetic bridge positioned on the second magnet. A third magnet and a third parallel magnetic bridge are also present, with the third magnet passing through the third magnet slot and the third parallel magnetic bridge positioned on the third magnet. All three magnets are two-section structures. This structure significantly improves the motor's peak torque and peak power, optimizes electromagnetic force distribution, improves NVH performance, and balances mechanical strength and anti-demagnetization properties, exhibiting excellent performance.

Description

Technical Field

[0001] This utility model relates to the field of high-power motor technology for new energy vehicles, specifically to a rotor topology, a drive motor rotor, and a motor for new energy vehicles. Background Technology

[0002] With increasing global focus on environmental protection and sustainable development, new energy vehicles, as a clean and efficient mode of transportation, have experienced rapid development. Permanent magnet motors, due to their advantages such as high power density, high efficiency, low torque ripple, and wide field-weakening speed range, are widely used in new energy vehicles. However, with the continuous advancement of new energy vehicle technology, the overall vehicle system places higher demands on the power density and speed of the motor.

[0003] Traditional V-shaped and delta-shaped rotor structures of permanent magnet motors, due to limitations in the number of magnets and the strength of the intermediate magnetic bridge, can no longer meet the high power density and high speed requirements of modern new energy vehicles, thus affecting the vehicle's acceleration performance and climbing ability. For example, at high power output, such as... Figure 2 The peak torque and peak power of the conventional double-V rotor structure motor shown are difficult to further improve, which in turn affects the acceleration performance of the vehicle and limits the performance of new energy vehicles in high-performance application scenarios. Therefore, developing a new rotor structure to improve the performance of permanent magnet motors has become an urgent technical problem to be solved in the current new energy vehicle field.

[0004] Based on this, the present invention provides a new rotor topology, a drive motor rotor, and a motor for new energy vehicles. Utility Model Content

[0005] Based on the above description, this utility model provides a rotor topology, a drive motor rotor, and a motor for new energy vehicles. This rotor topology significantly improves the peak torque and peak power of the motor by optimizing the structural design of the rotor laminations, while also addressing the problem of insufficient power in the high-speed range, thereby meeting the demand of new energy vehicles for high-performance motors.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] In a first aspect, this utility model provides a rotor topology, including:

[0008] Multiple rotor laminations are coaxially stacked and arranged in sequence; each rotor lamination is provided with a first magnetic slot, a second magnetic slot and a third magnetic slot in sequence along the radial direction.

[0009] A first magnet and a first parallel magnetic bridge, wherein the first magnet passes through the first magnet slot and the first parallel magnetic bridge is disposed on the first magnet;

[0010] The second magnet is inserted into the second magnet slot, and the second parallel magnetic bridge is disposed on the second magnet.

[0011] A third magnet and a third parallel magnetic bridge, wherein the third magnet passes through the third magnet slot and the third parallel magnetic bridge is disposed on the third magnet;

[0012] The first magnet, the second magnet, and the third magnet are all two-section structures.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, both the first magnet groove and the second magnet groove are V-shaped grooves;

[0015] The arrangement of the first magnet, the first parallel magnetic bridge, the second magnet, and the second parallel magnetic bridge is all V-shaped.

[0016] Furthermore, the third magnet grooves are all parallel grooves or V-shaped grooves;

[0017] The arrangement of the third magnet and the third parallel magnetic bridge is either horizontal or V-shaped.

[0018] Furthermore, the rotor topology also includes a first magnetically shielding air bag, a second magnetically shielding air bag, and a third magnetically shielding air bag;

[0019] The first magnetic shielding air bag, the second magnetic shielding air bag, and the third magnetic shielding air bag are respectively disposed at the first magnet, the second magnet, and the third magnet.

[0020] Furthermore, the rotor topology also includes a Q-axis auxiliary slot;

[0021] The Q-axis auxiliary groove is located at the edge of the rotor lamination.

[0022] Furthermore, there are multiple Q-axis auxiliary slots;

[0023] Multiple Q-axis auxiliary slots are spaced apart along the circumferential direction of the rotor laminations.

[0024] Furthermore, the rotor topology also includes built-in auxiliary slots;

[0025] The two built-in auxiliary slots are respectively located on both sides of the third magnet, and are separated from the outer edge of the third magnet by a gap.

[0026] Secondly, this utility model also provides a drive motor rotor, including a rotating shaft and a rotor topology as described in the first aspect;

[0027] The rotating shaft passes through the cavity in the rotor topology.

[0028] Thirdly, this utility model also provides an electric motor for new energy vehicles, which includes a stator and a drive motor rotor as described in the second aspect.

[0029] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0030] The rotor topology provided by this utility model has the following advantages compared with the prior art:

[0031] 1. Significantly Improved Peak Torque and Peak Power: By increasing the number of magnet slot layers in the rotor laminations, the multi-layer rotor structure of this invention significantly improves the peak torque and peak power of the motor. Compared with the conventional double-V rotor structure, the multi-layer rotor structure of this invention increases peak torque by 6% and peak power by 14.5%. This improvement effectively solves the performance bottleneck of traditional rotor structures at high power output, significantly improving the acceleration performance and hill-climbing ability of new energy vehicles.

[0032] 2. Optimized Electromagnetic Force and NVH Performance: By incorporating structures such as Q-axis auxiliary slots, parallel magnetic bridges, and magnetically shielding air pockets on the rotor laminations, this invention effectively optimizes the distribution of electromagnetic force, thereby significantly improving the motor's noise, vibration, and harshness (NVH) performance. This not only enhances the smoothness and comfort of motor operation but also reduces noise during operation, providing a quieter driving environment for new energy vehicles.

[0033] 3. Balancing Mechanical Strength and Demagnetization Prevention: While optimizing electromagnetic performance, this invention balances the rotor's mechanical strength and demagnetization prevention through the rational design of structures such as the parallel magnetic bridge and the magnetically shielding air jacket. This ensures the stability and reliability of the motor during high-power, high-speed operation, extending the motor's service life.

[0034] 4. Flexible magnet design: The magnet adopts a two-section design, and the included angle along the radial direction can be any angle, forming various shapes such as straight lines and V-shapes. This flexible design can be optimized and adjusted according to different motor performance requirements, improving the flexibility and adaptability of motor design. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the rotor topology provided in Embodiment 1 of the present invention;

[0036] Figure 2 Schematic diagram of simulation results for the rotor topology provided in Embodiment 1 of this utility model Figure 1 ;

[0037] Figure 3 Schematic diagram of simulation results for the rotor topology provided in Embodiment 1 of this utility model Figure 2 ;

[0038] Figure 4 A schematic diagram of a rotor topology provided for the prior art;

[0039] The attached diagram lists the components represented by each number as follows:

[0040] 1. Rotor laminations; 2. First parallel magnetic bridge; 3. Second parallel magnetic bridge; 4. Third parallel magnetic bridge; 5. First magnetic shielding air bag; 6. Second magnetic shielding air bag; 7. Third magnetic shielding air bag; 8. Q-axis auxiliary slot; 9. Internal auxiliary slot. Detailed Implementation

[0041] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0042] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0043] Example 1

[0044] like Figure 1 As shown, this utility model embodiment provides a rotor topology structure, including: a plurality of rotor laminations 1, which are coaxially stacked in sequence; any rotor lamination 1 is provided with a first magnet slot, a second magnet slot and a third magnet slot in sequence along the radial direction.

[0045] Specifically, the rotor consists of multiple rotor laminations 1, which are coaxially stacked to form a single rotor structure. The shape and size of each rotor lamination 1 are precisely designed to ensure the performance and stability of the motor.

[0046] It should be noted that in this embodiment, the rotor structure is a 6-pole rotor, but the number of motor slots includes, but is not limited to, 54 slots, 72 slots or 36 slots.

[0047] In a specific example, the rotor lamination 1 is made of silicon steel sheet with high magnetic permeability and low loss, in order to reduce eddy current losses and improve motor efficiency.

[0048] The first magnet and the first parallel magnetic bridge 2 are provided on the first magnet. The first magnet is inserted into the first magnet groove and the first parallel magnetic bridge 2 is provided on the first magnet.

[0049] The second magnet and the second parallel magnetic bridge 3 are arranged on the second magnet. The second magnet passes through the second magnet groove and the second parallel magnetic bridge 3 is arranged on the second magnet.

[0050] The third magnet and the third parallel magnetic bridge 3 are arranged on the third magnet. The third magnet passes through the third magnet groove and the third parallel magnetic bridge 3 is arranged on the third magnet.

[0051] The first magnet, the second magnet, and the third magnet are all two-section structures.

[0052] Both the first and second magnet slots are V-shaped slots;

[0053] The arrangement of the first magnet, the first parallel magnetic bridge 2, the second magnet, and the second parallel magnetic bridge 3 are all V-shaped.

[0054] In a preferred embodiment, the third magnet groove is either a parallel groove or a V-shaped groove.

[0055] The layout of the third magnet and the third parallel magnetic bridge 3 are both horizontal or V-shaped.

[0056] Specifically, each rotor lamination 1 has a first magnet slot, a second magnet slot, and a third magnet slot arranged sequentially along the radial direction. These magnet slots are used to place permanent magnets to generate the magnetic field required by the motor.

[0057] Both the first and second magnet slots are V-shaped slots. This design helps optimize the magnetic field distribution and improve the electromagnetic performance of the motor. The first and second magnets are respectively inserted into the first and second magnet slots, and the arrangement structure of the first and second magnets is V-shaped.

[0058] The third magnet slot can be a parallel slot or a V-shaped slot, depending on the performance requirements of the motor. The third magnet is inserted into the third magnet slot, and its arrangement can be a horizontal structure or a V-shaped structure.

[0059] In this embodiment, the third magnet adopts a two-section design, and the included angle between the two magnets along the radial direction can be any angle, such as 90°, 120° or 180°, to adapt to different design requirements.

[0060] Correspondingly, the first parallel magnetic bridge 2 is set on the first magnet, the second parallel magnetic bridge 3 is set on the second magnet, and the third parallel magnetic bridge 3 is set on the third magnet. The main function of these parallel magnetic bridges is to isolate magnetic fields, optimize the distribution of electromagnetic force, and also take into account mechanical strength and NVH performance.

[0061] The thickness and shape of the parallel magnetic bridges are optimized to ensure stability during high-power operation. For example, the thickness of the first parallel magnetic bridge 2 and the second parallel magnetic bridge 3 can be 1.5 mm, and the thickness of the third parallel magnetic bridge 3 can be 1.0 mm. The specific dimensions are adjusted according to the power and speed requirements of the motor.

[0062] In an optional example, the rotor topology also includes a first magnetically shielding air bag 5, a second magnetically shielding air bag 6, and a third magnetically shielding air bag 7.

[0063] The first magnetic shielding air bag 5, the second magnetic shielding air bag 6, and the third magnetic shielding air bag 7 are respectively installed at the first magnet, the second magnet, and the third magnet.

[0064] Specifically, the aforementioned magnetic shielding air bags are respectively installed at the first magnet, the second magnet, and the third magnet, for magnetic shielding and to prevent demagnetization.

[0065] The size and shape of the magnetic shielding air packs are optimized based on the size of the magnets and the magnetic field distribution. For example, the radial length of the first magnetic shielding air pack 5 can be 8mm, the radial length of the second magnetic shielding air pack 6 can be 4mm, and the radial length of the third magnetic shielding air pack 7 can be 3mm. The specific dimensions are adjusted according to the power and speed requirements of the motor.

[0066] In an optional example, the rotor topology also includes a Q-axis auxiliary slot 8; the Q-axis auxiliary slot 8 is located at the edge of the rotor lamination 1.

[0067] Optionally, there are multiple Q-axis auxiliary slots 8; the multiple Q-axis auxiliary slots 8 are arranged at intervals along the circumferential direction of the rotor lamination 1.

[0068] Specifically, the Q-axis auxiliary slot 8 is designed to optimize the distribution of electromagnetic force and improve NVH performance.

[0069] The shape and size of the Q-axis auxiliary slot 8 are optimized to ensure electromagnetic and NVH performance during high-power operation. For example, the depth of the Q-axis auxiliary slot 8 can be 0.5mm or 1.0mm, the width can be 1.5mm, and the shape can include, but is not limited to, arc, square, triangle, and other shapes. The specific dimensions are adjusted according to the performance requirements of the motor.

[0070] In an optional example, the rotor topology also includes built-in auxiliary slots 9; the two built-in auxiliary slots 9 are respectively located on both sides of the third magnet, and are separated from the outer edge of the third magnet by a gap. The gap distance can be any value, and the specific size is adjusted according to the NVH optimization effect.

[0071] Specifically, the main function of the built-in auxiliary slot 9 is to optimize the distribution of electromagnetic force, improve NVH performance, and at the same time take into account the anti-demagnetization function.

[0072] The size and shape of the built-in auxiliary slot 9 are optimized based on the size and magnetic field distribution of the third magnet. For example, the depth of the built-in auxiliary slot 9 can be 1.2mm, the width can be 2.0mm, and the shape can include, but is not limited to, various shapes such as Γ-shaped, T-shaped, triangular, and circular hole-shaped. The specific dimensions are adjusted according to the performance requirements of the motor.

[0073] To verify the performance of the multi-layer rotor topology provided in this embodiment of the invention, the following experiments and simulation analyses were conducted:

[0074] 1. External characteristic performance simulation

[0075] The external characteristic performance of the conventional double-V rotor structure and the multi-layer rotor structure of this invention were compared. Simulation results show that the multi-layer rotor structure provided by this invention outperforms the conventional double-V rotor structure in terms of both peak torque and peak power. Figure 4 The conventional double-V rotor structure is shown.

[0076] The specific data is as follows:

[0077] Peak torque enhancement: such as Figure 2 As shown, the multi-layer rotor structure increases the peak torque by 6% compared to the conventional double-V structure.

[0078] Peak power enhancement: such as Figure 3 As shown, the multi-layer rotor structure increases peak power by 14.5% compared to the conventional double-V structure.

[0079] 2. NVH performance testing

[0080] The effectiveness of the multi-layer rotor structure of this invention in optimizing electromagnetic force distribution and improving NVH performance was verified through noise, vibration, and acoustic roughness (NVH) tests.

[0081] Test results show that the multi-layer rotor structure provided by this utility model significantly reduces noise levels and vibration amplitude during operation, providing a quieter and more comfortable driving environment for new energy vehicles.

[0082] 3. Mechanical strength and anti-demagnetization performance tests

[0083] Mechanical strength tests and anti-demagnetization performance tests verified the stability and reliability of the multi-layer rotor structure provided by this utility model embodiment during high-power operation.

[0084] Test results show that the multi-layer rotor structure provided by this utility model meets the design requirements in terms of mechanical strength and anti-demagnetization performance when running at high power and high speed, ensuring the long-term stable operation of the motor.

[0085] Example 2

[0086] This embodiment provides a drive motor rotor, which adopts the multi-layer rotor topology provided in Embodiment 1.

[0087] Specifically, the rotor includes a shaft and the aforementioned multi-layered rotor topology. The shaft passes through the hollow cavity of the rotor topology to ensure stable rotor rotation.

[0088] The shaft is made of high-strength alloy steel to ensure mechanical strength during high-speed operation. The shaft and rotor laminations are fixedly connected by heat fitting or welding to ensure the overall structural stability of the rotor.

[0089] Example 3

[0090] This embodiment provides a motor for new energy vehicles, which adopts the multi-layer rotor topology provided in Embodiment 1 and the corresponding drive motor rotor provided in Embodiment 2.

[0091] Specifically, the rotor includes a shaft and the aforementioned multi-layered rotor topology. The shaft passes through the hollow cavity of the rotor topology to ensure stable rotor rotation.

[0092] The shaft is made of high-strength alloy steel to ensure mechanical strength during high-speed operation. The shaft and rotor laminations are fixedly connected by heat fitting or welding to ensure the overall structural stability of the rotor.

[0093] In summary, the multi-layer rotor topology provided by this embodiment of the invention significantly improves the peak torque and peak power of high-power motors for new energy vehicles by optimizing the design of the magnet slots, parallel magnetic bridges, magnetically shielded air jackets, Q-axis auxiliary slots, and built-in auxiliary slots. Simultaneously, it optimizes the electromagnetic force distribution, improves NVH performance, and balances mechanical strength and anti-demagnetization properties. This structure demonstrates excellent performance in practical applications of drive motor rotors and motors used in new energy vehicles, meeting the demands of new energy vehicles for high-performance motors and possessing broad application prospects.

[0094] In this specification, the use of terms such as "specific example" or "some examples" indicates 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 present invention. In this specification, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rotor topology, characterized in that, include: Multiple rotor laminations are coaxially stacked and arranged in sequence; each rotor lamination is provided with a first magnetic slot, a second magnetic slot and a third magnetic slot in sequence along the radial direction. A first magnet and a first parallel magnetic bridge, wherein the first magnet passes through the first magnet slot and the first parallel magnetic bridge is disposed on the first magnet; The second magnet is inserted into the second magnet slot, and the second parallel magnetic bridge is disposed on the second magnet. A third magnet and a third parallel magnetic bridge, wherein the third magnet passes through the third magnet slot and the third parallel magnetic bridge is disposed on the third magnet; The first magnet, the second magnet, and the third magnet are all two-section structures.

2. The rotor topology according to claim 1, characterized in that, Both the first magnet groove and the second magnet groove are V-shaped grooves; The arrangement of the first magnet, the first parallel magnetic bridge, the second magnet, and the second parallel magnetic bridge is all V-shaped.

3. The rotor topology according to claim 2, characterized in that, The third magnet grooves are all parallel grooves or V-shaped grooves; The arrangement of the third magnet and the third parallel magnetic bridge is either horizontal or V-shaped.

4. The rotor topology according to claim 1, characterized in that, The rotor topology also includes a first magnetically shielding air bag, a second magnetically shielding air bag, and a third magnetically shielding air bag; The first magnetic shielding air bag, the second magnetic shielding air bag, and the third magnetic shielding air bag are respectively disposed at the first magnet, the second magnet, and the third magnet.

5. The rotor topology according to claim 1, characterized in that, The rotor topology also includes a Q-axis auxiliary slot; The Q-axis auxiliary groove is located at the edge of the rotor lamination.

6. The rotor topology according to claim 5, characterized in that, There are multiple Q-axis auxiliary slots; Multiple Q-axis auxiliary slots are spaced apart along the circumferential direction of the rotor laminations.

7. The rotor topology according to claim 1, characterized in that, The rotor topology also includes built-in auxiliary slots; The two built-in auxiliary slots are respectively located on both sides of the third magnet, and are separated from the outer edge of the third magnet by a gap.

8. A drive motor rotor, characterized in that, Includes a rotating shaft and a rotor topology as described in any one of claims 1 to 7; The rotating shaft passes through the cavity in the rotor topology.

9. A motor for use in new energy vehicles, characterized in that, It includes a stator and a drive motor rotor as described in claim 8.

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