Brushless doubly-fed electric machine port motor based on non-uniform split tooth magnetic field modulation self-stacking

Abstract

The application provides a brushless doubly-fed motor port motor based on non-uniform split tooth magnetic field modulation self superposition, which comprises a stator, an outer winding, an inner winding, an outer rotor and an inner rotor; the stator adopts a non-uniform split tooth structure, and the stator comprises main teeth, first secondary teeth and second secondary teeth which are uniformly distributed along the circumferential direction, and the first secondary teeth and the second secondary teeth are formed by splitting one end of the main teeth close to the air gap; the stator forms a non-uniform magnetic permeance modulation structure composed of different numbers of split secondary teeth; the outer winding and the inner winding are arranged on the stator, wherein the outer winding is arranged in the stator slot formed by the main teeth, and five-phase armature windings are formed by adopting left and right winding modes. The application can fully utilize high-order space harmonic components to realize multi-path magnetic field modulation, and realize the collaborative modulation of the fundamental wave magnetic field and the high-order space harmonic magnetic field.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a brushless dual-electromechanical-port motor based on non-uniform split tooth magnetic field modulation self-superposition. Background Technology

[0002] With the development of new energy vehicles, aerospace, electric drives, and multi-energy conversion systems, traditional single-input single-output motors are increasingly unable to meet the demands of multi-port energy transfer, multi-degree-of-freedom adjustment, and high power density operation in complex drive systems. Dual-electromechanical-port motors, capable of energy conversion between mechanical and electrical ports through a single electromagnetic device and possessing power transfer and speed regulation capabilities between two independent electrical ports, show promising application prospects in hybrid power systems, energy conversion devices, and intelligent drive systems.

[0003] Existing dual-port motors mainly achieve energy coupling between different ports through multiple sets of stator windings, dual-rotor structures, or magnetic field modulation structures. Among them, some dual-winding motors adopt a structure in which two sets of windings are arranged on the same stator. However, due to the large difference in the number of pole pairs of the magnetic field generated by the two sets of windings, the traditional uniform stator tooth structure is difficult to simultaneously meet the spatial matching requirements of magnetic fields with different numbers of pole pairs. This can easily lead to problems such as insufficient magnetic field coupling capability, low effective harmonic utilization, and limited energy conversion efficiency between ports.

[0004] Magnetic field modulation motors alter the air gap permeability distribution through a magnetic adjustment structure, enabling spatial harmonic coupling between magnetic fields with different pole pairs. This provides a new technical approach for matching high-pole-log magnetic fields with low-pole-log magnetic fields. However, existing magnetic field modulation motors typically employ a uniformly distributed modulation tooth structure, resulting in relatively fixed permeability harmonic components. They primarily rely on single-order spatial harmonics for magnetic field conversion, making it difficult to fully utilize higher-order spatial harmonic components to achieve multi-path magnetic field modulation.

[0005] In addition, in existing dual-port motors, energy transfer is usually achieved by independent magnetic circuits or a single magnetic field modulation relationship between different ports. The form of magnetic field utilization is relatively simple, making it difficult to achieve coordinated modulation of the fundamental magnetic field and the higher-order spatial harmonic magnetic field. Summary of the Invention

[0006] Based on this, the present invention provides a brushless dual electromechanical port motor based on non-uniform split tooth magnetic field modulation self-superposition, so as to make full use of high-order spatial harmonic components to realize multi-path magnetic field modulation and achieve synergistic modulation of fundamental magnetic field and high-order spatial harmonic magnetic field.

[0007] A brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition includes a stator, an outer winding, an inner winding, an outer rotor, and an inner rotor. The stator adopts a non-uniform split tooth structure. The stator includes main teeth, first auxiliary teeth and second auxiliary teeth that are uniformly distributed along the circumference. The first auxiliary teeth and second auxiliary teeth are both formed by splitting the main teeth at the end near the air gap. The stator forms a non-uniform magnetic permeability modulation structure composed of different numbers of split auxiliary teeth. The outer winding and the inner winding are both set on the stator. The outer winding is set in the stator slot formed by the main teeth and forms a five-phase armature winding by using left and right winding. The inner winding is set in the split slot formed by the first and second auxiliary teeth, and a three-phase armature winding is formed by high and low winding. The outer rotor is coaxially disposed between the stator and the inner rotor. The outer rotor includes a tangentially excitable permanent magnet and a magnetic adjustment ring disposed between adjacent tangentially excitable permanent magnets. The tangentially excitable permanent magnets are alternately magnetized along the circumferential direction to generate the permanent magnet magnetic field of the outer rotor. The magnetic adjustment ring is used to modulate the permanent magnet magnetic field of the outer rotor and the armature magnetic field of the stator. The outer rotor has both permanent magnet excitation and magnetic field modulation functions, and achieves spatial harmonic modulation and matching between magnetic fields with different pole pairs through the combined action of the adjusting ring and the non-uniform split tooth structure of the stator. The inner rotor is located inside the outer rotor. The inner rotor includes permanent magnet units arranged alternately along the circumferential direction. The permanent magnet units adopt a Hellbeck alternating pole excitation structure. The outer winding, inner winding, tangential excitation permanent magnet, and permanent magnet unit in the inner rotor work together to achieve magnetic field modulation self-superposition through the non-uniform periodic magnetic permeability formed by the non-uniform split tooth structure.

[0008] The above-mentioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, wherein the motor satisfies the following formula:

[0009] in, The number of pole pairs of the inner winding. The number of pole pairs of the tangentially excited permanent magnet. This represents the total number of the first and second sets of teeth.

[0010] The above-mentioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, wherein the motor satisfies the following formula:

[0011] in, The number of pole pairs of the outer winding. To adjust the number of magnetic rings, and .

[0012] The above-mentioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, wherein the motor satisfies the following formula:

[0013] in, is the number of permanent magnet pole pairs of the inner rotor. The spatial harmonic order is generated after the permanent magnet magnetic field of the inner rotor is modulated by the non-uniform split tooth structure.

[0014] The aforementioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition generates spatial harmonic magnetic field components with different pole pair numbers in the air gap space after the permanent magnet magnetic field of the outer rotor, the permanent magnet magnetic field of the inner rotor, and the armature magnetic field generated by the outer and inner windings are respectively modulated by the composite magnetic permeability formed by the adjusting ring and the stator. The spatial harmonic magnetic field components from different sources establish synchronous coupling relationships with the corresponding armature magnetic field or permanent magnet magnetic field through the pole pair matching relationship, so that the effective magnetic field components generated by multiple magnetic field modulation paths participate in electromechanical energy conversion in the same air gap magnetic field environment, thereby forming a magnetic field modulation self-superposition effect.

[0015] The aforementioned brushless dual electromechanical port motor based on non-uniform split tooth magnetic field modulation self-superposition has 10 main teeth, with two first auxiliary teeth at the ends of 5 main teeth and four second auxiliary teeth at the ends of the other 5 main teeth, so that different main teeth correspond to different numbers of split auxiliary teeth.

[0016] The above-mentioned brushless dual electromechanical port motor based on non-uniform split tooth magnetic field modulation self-superposition, wherein in the non-uniform split tooth structure, the main teeth with two first auxiliary teeth and the main teeth with four second auxiliary teeth are alternately distributed along the stator circumference, so that the stator air gap side forms a non-uniform magnetic permeability distribution with different spatial periods, which is used to generate multi-order spatial magnetic permeability harmonic components and realize the modulation coupling between magnetic fields with different pole pairs.

[0017] The aforementioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, wherein the outer winding and the inner winding serve as the first electrical port and the second electrical port, respectively, and the outer rotor and the inner rotor serve as two mechanical energy transmission ends, respectively. Through the magnetic field modulation relationship formed between the stator, the outer rotor adjusting ring and the permanent magnet magnetic field, the energy conversion between electrical energy and mechanical energy and between the two electrical ports is realized.

[0018] The aforementioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, wherein the motor has at least the following operating modes: 1) Dual-motor operation mode: The outer winding and the inner winding are connected to an external power source respectively. Electrical energy is input into the two electrical ports at the same time, and the outer rotor and the inner rotor are driven to rotate through the corresponding magnetic field modulation relationship, so as to realize the dual mechanical port output. 2) Dual power generation operation mode: Mechanical energy is input into the outer rotor and the inner rotor, and the outer and inner rotors output electrical energy simultaneously through magnetic field coupling between the permanent magnet fields of the outer rotor and the permanent magnet fields of the inner rotor and the stator windings, respectively. 3) Power transfer operation mode: Power is input into one electrical port, and after being modulated and superimposed by the magnetic field, power is output from the other electrical port through the coupling relationship between the mechanical port and the other electrical port. 4) Power distribution operation mode: By adjusting the current amplitude, frequency and phase of the outer winding and the inner winding, the power distribution and operation status adjustment between the two mechanical ports can be realized.

[0019] The aforementioned brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation and self-superposition, wherein the electrical frequency of the outer winding... and the electrical frequency of the inner winding They respectively satisfy:

[0020]

[0021] in, and These are the mechanical speeds of the outer rotor and the inner rotor, respectively.

[0022] The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition provided by the present invention has the following beneficial effects: (1) The present invention adopts a stator with a non-uniform split tooth structure. By setting a main tooth structure with different numbers of auxiliary teeth, the stator forms a non-uniform magnetic permeability modulation structure. Compared with the traditional uniform tooth structure, it can generate richer spatial magnetic permeability harmonics, providing conditions for modulation matching between magnetic fields with different pole pairs. (2) The motor of the present invention realizes the non-uniform split tooth structure magnetic field modulation self-superposition structure. By constructing a non-uniform magnetic permeability modulation environment, a multi-path magnetic field modulation relationship is formed between the two sets of winding magnetic fields, the outer rotor permanent magnet magnetic field and the inner rotor permanent magnet magnetic field in the same stator structure, making full use of the high-order spatial harmonic components.

[0023] (3) The present invention sets the outer winding and the inner winding together on the same stator, and uses the main tooth, the first auxiliary tooth and the second auxiliary tooth to form different magnetic field action areas, thereby realizing the integration of the dual-port motor structure.

[0024] (4) This invention utilizes the fundamental modulation relationship of the permanent magnet magnetic field of the outer rotor and the high-order spatial harmonic modulation relationship of the permanent magnet magnetic field of the inner rotor to achieve the synergistic effect of fundamental magnetic field modulation and high-order harmonic magnetic field modulation, thereby improving the utilization rate of permanent magnet magnetic field.

[0025] (5) This invention establishes , , The three sets of magnetic field matching relationships enable the magnetic fields at different ports to be effectively coupled through corresponding modulation paths.

[0026] (6) The present invention adopts a Heilbeck alternating pole permanent magnet structure as the excitation method of the inner rotor, which improves the magnetic field concentration capability of the inner rotor and, combined with high-order space harmonic modulation, can realize independent electromechanical energy conversion and power transfer between the two electromechanical ports. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a brushless dual electromechanical port motor based on non-uniform split tooth magnetic field modulation and self-superposition in an embodiment of the present invention. Figure 2 This is a schematic diagram of the stator structure; Figure 3 This is a schematic diagram of the outer winding structure; Figure 4 This is a schematic diagram of the inner winding structure; Figure 5 This is a schematic diagram of the external rotor structure; Figure 6 This is a schematic diagram of the internal rotor structure; Figure 7 This is a schematic diagram of the tangential excitation permanent magnet structure of the external rotor and the arrangement of the adjusting ring. Figure 8 A schematic diagram of an internal rotor Hellbeck alternating pole excitation structure; Figure 9 This is a comparison diagram of the internal air gap magnetic flux density waveforms of the present invention and a traditional brushless dual-port motor. Figure 10 This is a comparison diagram of the Fourier transform (FFT) of the internal air gap magnetic flux density of the present invention and that of a traditional brushless dual-port motor. Figure 11 This is a comparison diagram of the external air gap magnetic flux density waveforms of the present invention and a traditional brushless dual-port motor; Figure 12 This is a comparison diagram of the external air gap magnetic flux density Fourier transform (FFT) of the present invention and that of a traditional brushless dual-port motor. Detailed Implementation

[0028] To facilitate understanding of the present invention, a more complete description will be given below with reference to various embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 8 This invention provides a brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, comprising a stator 1, an outer winding 2, an inner winding 3, an outer rotor 4, and an inner rotor 5. The stator 1 is located in the radial center of the motor, the outer rotor 4 is coaxially disposed between the stator 1 and the inner rotor 5, and the inner rotor 5 is disposed inside the outer rotor 4. The outer winding 2 and the inner winding 3 are both disposed on the stator 1, and energy conversion between the two independent electromechanical ports is achieved through the same stator magnetic field modulation structure.

[0031] Stator 1 adopts a non-uniform split tooth structure. Stator 1 includes a main tooth 1-1, a first auxiliary tooth 1-2 and a second auxiliary tooth 1-3 that are uniformly distributed along the circumference. The first auxiliary tooth 1-2 and the second auxiliary tooth 1-3 are both formed by splitting the main tooth 1-1 at the end near the air gap. The stator forms a non-uniform magnetic permeability modulation structure composed of different numbers of split auxiliary teeth.

[0032] In this embodiment, there are 10 main teeth 1-1, of which 5 main teeth 1-1 are provided with two first auxiliary teeth 1-2 at their ends, and the other 5 main teeth 1-1 are provided with four second auxiliary teeth 1-3 at their ends, so that different main teeth correspond to different numbers of split auxiliary teeth.

[0033] In the non-uniform split tooth structure, the main tooth 1-1 with two first auxiliary teeth 1-2 and the main tooth 1-1 with four second auxiliary teeth 1-3 are alternately distributed along the circumferential direction of the stator, so that a non-uniform magnetic permeability distribution with different spatial periods is formed on the air gap side of the stator, which is used to generate multi-order spatial magnetic permeability harmonic components and realize the modulation coupling between magnetic fields with different pole pairs.

[0034] The aforementioned non-uniform split tooth structure enables a non-uniform periodic magnetic permeability distribution near the air gap side of stator 1. Compared to the traditional uniformly distributed modulation tooth structure, the non-uniform magnetic permeability distribution can generate richer spatial magnetic permeability harmonic components. This allows the permanent magnet magnetic field and armature magnetic field with different pole pairs to form effective harmonic components that satisfy the spatial matching conditions after passing through the corresponding modulation paths, providing a basis for the self-superposition of magnetic field modulation.

[0035] The outer winding 2 is disposed in the stator slot formed by the main teeth 1-1, forming a five-phase armature winding using a left-right winding configuration. It forms an independent magnetic circuit through the main teeth 1-1 to generate a low pole-pair number rotating magnetic field. By controlling the current frequency, amplitude, and phase of the outer winding 2, electrical energy input or output at the outer winding port can be achieved. The low pole-pair number rotating magnetic field generated by the outer winding 2 first undergoes spatial magnetic permeability modulation through the non-uniform split tooth structure of the stator 1, generating spatial harmonic magnetic field components matching the number of the outer rotor tuning rings 4-2. Magnetic field transmission is achieved through the tuning rings 4-2, forming an energy conversion path between the electrical port of the outer winding 2 and the mechanical port of the outer rotor 4. In this embodiment, the number of pole pairs in the outer winding 2 is 4.

[0036] The inner winding 3 is disposed within the split slot formed by the first auxiliary tooth 1-2 and the second auxiliary tooth 1-3, and forms a three-phase armature winding using a high-low winding method. In this embodiment, the inner winding 3 has 13 pole pairs. Since the inner winding 3 is disposed in the split auxiliary tooth region, its magnetic field can fully utilize the spatial magnetic permeability harmonics generated by the non-uniform split tooth structure. The permanent magnet magnetic field generated by the outer rotor 4 is modulated by the non-uniform split tooth structure of the stator 1 to form spatial harmonic components that match the magnetic field of the inner winding 3, realizing the electromagnetic energy conversion between the inner winding port and the outer rotor 4. At the same time, other orders of spatial harmonic components generated by this non-uniform magnetic permeability modulation process can participate in the coupling of other magnetic field paths, so that the same permanent magnet magnetic field forms multiple effective magnetic field components through different modulation paths, realizing the comprehensive utilization of magnetic field resources.

[0037] The outer rotor 4 is coaxially positioned between the stator 1 and the inner rotor 5. Please refer to the following for details. Figure 7 , Figure 7 The arrows indicate the magnetization direction of the permanent magnets. The outer rotor 4 includes tangentially excitation permanent magnets 4-1 and adjusting rings 4-2 disposed between adjacent tangentially excitation permanent magnets 4-1. The tangentially excitation permanent magnets 4-1 are alternately magnetized along the circumferential direction to generate the permanent magnet magnetic field of the outer rotor. The adjusting rings 4-2 are used to modulate the permanent magnet magnetic field of the outer rotor and the stator armature magnetic field. The number of adjusting rings 4-2 is... The number of pole pairs of the tangentially excited permanent magnet 4-1 satisfy: This relationship ensures that the permanent magnet field of the outer rotor is matched with the spatial period of the tuning ring, thereby achieving effective magnetic field modulation and enabling the outer rotor 4 to simultaneously possess permanent magnet excitation and magnetic field modulation functions.

[0038] The outer rotor 4 has both permanent magnet excitation and magnetic field modulation functions. Through the combined action of the magnetic ring 4-2 and the non-uniform split tooth structure of the stator, spatial harmonic modulation and matching between magnetic fields with different pole pairs can be achieved.

[0039] The inner rotor 5 is located inside the outer rotor 4; please refer to this carefully. Figure 8 , Figure 8The arrows indicate the magnetization direction of the permanent magnets. The inner rotor 5 includes permanent magnet units arranged alternately along the circumference, and these units employ a Hellbeck alternating pole excitation structure. This Hellbeck magnet arrangement increases the magnetic field strength of the permanent magnets towards the air gap, enhancing the magnetization effect. The permanent magnet magnetic field of the inner rotor 5, after being modulated by the non-uniform split tooth structure, generates a spatial harmonic magnetic field for electromechanical energy conversion, improving the utilization rate of the inner rotor's permanent magnet magnetic field. Because the permanent magnet magnetic field of the inner rotor 5 has abundant spatial harmonic components, its permanent magnet magnetic field is spatially modulated by the tuning ring 4-2 in the outer rotor 4, forming an effective harmonic magnetic field component that matches the number of pole pairs in the outer winding 2.

[0040] The outer winding 2, the inner winding 3, the tangential excitation permanent magnet 4-1, and the permanent magnet unit in the inner rotor work together to achieve magnetic field modulation self-superposition through the non-uniform periodic magnetic permeability formed by the non-uniform split tooth structure.

[0041] It should be noted that the magnetic field modulation self-superposition described in this invention refers to the process by which the outer rotor permanent magnet magnetic field, the inner rotor permanent magnet magnetic field, and the magnetic fields of the two sets of armature windings, after passing through their respective magnetic field modulation paths, form multiple effective magnetic field components that satisfy the pole pair matching condition within the same motor air gap space. These components then work together through synchronous coupling between different magnetic fields to complete the electromechanical energy conversion process. Here, self-superposition does not refer to the simple superposition of different magnetic field amplitudes, but rather to the comprehensive superposition of spatially synchronous effective harmonic components formed by magnetic fields from different sources after passing through different modulation paths.

[0042] Specifically, the permanent magnet magnetic field of the outer rotor, the permanent magnet magnetic field of the inner rotor, and the armature magnetic field generated by the outer winding 2 and the inner winding 3 are respectively modulated by the composite magnetic permeability formed by the magnetic ring 4-2 and the stator 1, and then generate spatial harmonic magnetic field components with different pole pairs in the air gap space. The spatial harmonic magnetic field components from different sources establish synchronous coupling relationships with the corresponding armature magnetic field or permanent magnet magnetic field through the pole pair matching relationship, so that the effective magnetic field components generated by multiple magnetic field modulation paths participate in electromechanical energy conversion in the same air gap magnetic field environment, thereby forming a magnetic field modulation self-superposition effect.

[0043] In this embodiment, the armature magnetic field generated by the inner winding 3 is modulated by the periodically changing magnetic permeability formed by the non-uniform split tooth structure, and is magnetically matched with the spatial harmonic components generated by the tangential excitation permanent magnet magnetic field of the outer rotor 4. Specifically, the motor satisfies the following formula:

[0044] in, The number of pole pairs for inner winding 3 is 13 in this embodiment; The number of pole pairs of the tangentially excitation permanent magnet 4-1 is 17 in this embodiment; The total number of the first set of teeth 1-2 and the second set of teeth 1-3 is 30 in this embodiment. The above formula enables the permanent magnet magnetic field of the outer rotor to form an effective spatial harmonic component that matches the magnetic field of the inner winding armature after being modulated by the non-uniform split tooth structure, thereby realizing magnetic field coupling and energy conversion between the inner winding port and the outer rotor mechanical port.

[0045] The low pole-log armature magnetic field generated by the outer winding 2, after being modulated by the non-uniform split tooth structure and the adjusting ring 4-2, forms a spatial harmonic magnetic field that matches the number of adjusting rings on the outer rotor. Specifically, the motor also satisfies the following formula:

[0046] in, This is the number of pole pairs of the outer winding 2, which is 4 in this embodiment; In this embodiment, to adjust the number of magnetic rings 4-2, The value is 34. Through the above magnetic field modulation relationship, the magnetic field of the outer winding armature and the outer rotor tuning ring are effectively coupled, realizing the electromechanical energy conversion between the outer winding port and the outer rotor mechanical port.

[0047] The permanent magnet magnetic field generated by the inner rotor 5 acts on the outer rotor 4, and is modulated by the magnetic adjustment ring 4-2 in the outer rotor 4 to form a modulated magnetic field with higher-order spatial harmonic components. Specifically, the motor also satisfies the following equation:

[0048] in, The number of permanent magnet pole pairs of the inner rotor 5 is given in this embodiment. The value is 10. The spatial harmonic order is generated after the permanent magnet magnetic field of the inner rotor is modulated by the non-uniform split tooth structure. By modulating the permanent magnet magnetic field of the inner rotor with high-order spatial harmonics through the magnetic ring 4-2, the permanent magnet magnetic field generated by the inner rotor 5 and the armature magnetic field generated by the outer winding 2 form a spatial pole pair matching, realizing magnetic field coupling and energy conversion between the mechanical port of the inner rotor and the electrical port of the outer winding.

[0049] Based on the above structure, the motor in this embodiment achieves multi-path magnetic field coupling between the outer rotor permanent magnet magnetic field, the inner rotor permanent magnet magnetic field, and the magnetic fields of the two sets of armature windings through the non-uniform magnetic permeability modulation effect generated by the non-uniform split tooth structure.

[0050] Specifically, when the outer rotor 4 rotates, the permanent magnet magnetic field of the outer rotor generated by the tangential excitation permanent magnet 4-1 is first modulated by the magnetic field of the non-uniform split tooth structure of the stator 1. Since the first set of teeth 1-2 and the second set of teeth 1-3 have different spatial distribution forms, the stator 1 forms a non-uniform periodic magnetic permeability distribution, thereby modulating the permanent magnet magnetic field of the outer rotor into magnetic field components containing multiple spatial harmonic orders.

[0051] Among them, the spatial harmonic components that match the number of pole pairs of the inner winding 3 can couple with the rotating magnetic field generated by the inner winding 3 to realize the electromechanical energy conversion between the mechanical port of the outer rotor 4 and the electrical port of the inner winding 3.

[0052] Simultaneously, when an alternating current is applied to the outer winding 2, the rotating armature magnetic field generated by the outer winding 2 is first modulated by the magnetic permeability formed by the non-uniform split tooth structure of the stator 1, generating an effective harmonic magnetic field component that satisfies the spatial periodic matching condition of the adjusting ring 4-2 of the outer rotor 4. This effective harmonic magnetic field component, together with the adjusting ring 4-2 and the tangential excitation permanent magnet 4-1 in the outer rotor 4, realizes the energy conversion between the armature magnetic field of the outer winding 2 and the permanent magnet magnetic field of the outer rotor 4, thereby achieving electromechanical coupling between the electrical port of the outer winding 2 and the mechanical port of the outer rotor 4.

[0053] Furthermore, the inner rotor 5 adopts a Hellbeck-type alternating pole permanent magnet structure, which generates a permanent magnet magnetic field with a high air gap magnetic flux density. Since the permanent magnet magnetic field of the inner rotor 5 contains abundant spatial high-order harmonic components, this magnetic field first acts on the tuning ring 4-2 in the outer rotor 4. Through the spatial magnetic permeability modulation effect of the tuning ring 4-2, the high-order spatial harmonic components in the permanent magnet magnetic field of the inner rotor are converted into effective magnetic field components that match the number of pole pairs of the outer winding 2.

[0054] The higher-order spatial harmonic magnetic field component can form a spatial synchronization relationship with the armature magnetic field generated by the outer winding 2, so that the energy of the mechanical port of the inner rotor 5 can be transferred to the electrical port of the outer winding 2 through the higher-order spatial harmonic modulation path, realizing the electromechanical energy conversion between the inner rotor 5, the outer rotor magnetic ring 4-2 and the outer winding 2.

[0055] Therefore, the magnetic field modulation self-superposition in this embodiment does not refer to the simple superposition of multiple magnetic field amplitudes, but rather to the formation of effective harmonic magnetic fields with spatial pole pair matching after magnetic fields from different sources pass through different modulation paths, and jointly participate in energy conversion in the same air gap magnetic field environment, specifically: The first type is a magnetic field modulation path in which the permanent magnet magnetic field of the outer rotor is modulated by the non-uniform split tooth structure of the stator and coupled with the inner winding 3. The second type is a magnetic field modulation path in which the armature magnetic field of the outer winding 2 is modulated by the non-uniform split tooth structure of the stator and coupled with the magnetic ring 4-2 of the outer rotor 4. The third type is a high-order spatial harmonic magnetic field that satisfies the pole pair matching condition after the permanent magnet magnetic field of the inner rotor 5 is spatially modulated by the magnetic ring 4-2 of the outer rotor 4, and forms a magnetic field coupling modulation path with the outer winding 2.

[0056] The three magnetic field modulation paths mentioned above work together to enable magnetic fields from different sources and with different numbers of pole pairs to achieve spatial matching within the same motor structure, thus realizing the self-superposition of magnetic field modulation based on a non-uniform split tooth structure.

[0057] In this embodiment, the outer winding 2 and the inner winding 3 are each an independent electrical port, and their induced electrical frequency is determined by the equivalent number of pole pairs modulated by the corresponding magnetic field and the mechanical speed of the inner and outer rotors. By controlling the current frequency, amplitude, and phase of the outer winding 2 and the inner winding 3, independent speed regulation, power distribution, and bidirectional conversion between mechanical energy and electrical energy between the two electromechanical ports are achieved.

[0058] Specifically, the outer winding 2 and the inner winding 3 serve as the first and second electrical ports, respectively, and the outer rotor 4 and the inner rotor 5 serve as two mechanical energy transmission ends. Through the magnetic field modulation relationship formed between the stator 1, the outer rotor tuning ring 4-2, and the permanent magnet magnetic field, the energy conversion between electrical energy and mechanical energy, as well as between the two electrical ports, is realized.

[0059] The motor has at least the following operating modes: 1) Dual-motor operation mode: The outer winding 2 and the inner winding 3 are connected to the external power supply respectively. The two electrical ports are simultaneously input with electrical energy and drive the outer rotor 4 and the inner rotor 5 to rotate through the corresponding magnetic field modulation relationship, so as to realize the dual mechanical port output. 2) Dual power generation operation mode: Mechanical energy is input into the outer rotor 4 and the inner rotor 5, and the outer winding 2 and the inner winding 3 output electrical energy simultaneously through magnetic field coupling between the permanent magnet magnetic field of the outer rotor and the permanent magnet magnetic field of the inner rotor and the stator winding, respectively. 3) Power transfer operation mode: Power is input into one electrical port, and after being modulated and superimposed by the magnetic field, power is output from the other electrical port through the coupling relationship between the mechanical port and the other electrical port. 4) Power distribution operation mode: By adjusting the current amplitude, frequency and phase of the outer winding 2 and the inner winding 3, the power distribution and operation status adjustment between the two mechanical ports can be realized.

[0060] The electrical frequency of outer winding 2 and the electrical frequency of inner winding 3 They respectively satisfy:

[0061]

[0062] in, and These represent the mechanical rotational speeds of the outer rotor 4 and the inner rotor 5, respectively. Through the aforementioned frequency relationship, and utilizing the specific spatial magnetic field harmonic components generated by the non-uniform split-tooth structure, the outer winding 2 and the inner winding 3 interact with rotating magnetic fields of different equivalent pole pairs, thereby achieving independent coupling control between the output frequencies of the two electrical ports and the corresponding motion states of the mechanical ports. Even when the outer rotor 4 and the inner rotor 5 are at different rotational speeds, the two electrical ports can still obtain electrical energy output at their respective frequencies, realizing a high degree of freedom energy conversion between the two mechanical ports and the two electrical ports.

[0063] To verify the influence of the non-uniform split-tooth magnetic field modulation self-superposition structure proposed in this invention on the air gap magnetic field modulation effect, air gap magnetic flux density analysis was performed on the motor of this invention and a traditional brushless dual-port motor (with a uniformly distributed modulation structure). Figure 9 As shown, thanks to the non-uniform split tooth structure adopted in this invention, the amplitude of the internal air gap magnetic flux density waveform is significantly improved, and the magnetic flux density distribution is more continuous. This indicates that the non-uniform split tooth structure can change the air gap magnetic permeability distribution, so that the permanent magnet magnetic field of the internal rotor can obtain a more sufficient modulation effect and improve the amplitude of the effective magnetic field component.

[0064] Furthermore, such as Figure 10 As shown, the non-uniform split-tooth structure proposed in this invention can effectively enhance the target spatial harmonic components in the inner air gap. Specifically, the amplitude of the 10-pole-log spatial harmonic, corresponding to the number of pole pairs of the inner rotor permanent magnet magnetic field, is increased from 0.801 in the traditional brushless dual-port motor to 1.140, an improvement of approximately 42.3%. This result indicates that the non-uniform split-tooth structure can optimize the air gap magnetic permeability harmonic distribution, enabling the inner rotor permanent magnet magnetic field to form a stronger effective magnetic field component after magnetic permeability modulation, providing a magnetic field basis for energy conversion at the inner winding port.

[0065] like Figure 11 As shown, thanks to the non-uniform split-tooth structure adopted in this invention, the amplitude of the external air gap magnetic flux density is improved, and the magnetic flux density waveform contains more usable spatial harmonic components. This indicates that this invention can not only improve the modulation effect of the internal air gap magnetic field, but also enhance the magnetic field coupling capability between the external rotor tuning ring and the stator armature magnetic field through non-uniform magnetic permeability modulation.

[0066] like Figure 12 As shown, compared to traditional brushless dual-port motors, this invention can improve the effective spatial harmonic amplitude related to dual-port magnetic field coupling while maintaining the main operating harmonic components. Specifically, the 10-pole logarithmic spatial harmonic component in the external air gap magnetic flux density is significantly enhanced, while the 17-pole logarithmic corresponding operating harmonic maintains a high amplitude. This results in a more effective magnetic field matching relationship between the external rotor permanent magnet magnetic field, the external winding armature magnetic field, and the tuning ring, thereby improving the utilization capability of the external port magnetic field.

[0067] As can be seen from the above air gap magnetic flux density spectrum analysis, the non-uniform split-tooth structure proposed in this invention does not simply increase the amplitude of the air gap magnetic field. Instead, it alters the spatial magnetic permeability harmonic distribution by constructing a non-uniform magnetic permeability modulation environment. This allows magnetic fields with different pole pair numbers to obtain enhanced effective harmonic components after passing through corresponding modulation paths, thereby achieving magnetic field modulation self-superposition and improving the magnetic field coupling capability and energy transfer efficiency of the dual-electromechanical-port motor. Therefore, the magnetic field modulation self-superposition in this embodiment does not refer to the simple superposition of multiple magnetic field amplitudes, but rather to the formation of spatially pole pair-matched effective harmonic magnetic fields after magnetic fields from different sources pass through different modulation paths, and these fields jointly participate in energy conversion within the same air gap magnetic field environment.

[0068] In summary, the brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition provided by the present invention has the following beneficial effects: (1) The present invention adopts a stator with a non-uniform split tooth structure. By setting a main tooth structure with different numbers of auxiliary teeth, the stator forms a non-uniform magnetic permeability modulation structure. Compared with the traditional uniform tooth structure, it can generate richer spatial magnetic permeability harmonics, providing conditions for modulation matching between magnetic fields with different pole pairs. (2) The motor of the present invention realizes the non-uniform split tooth structure magnetic field modulation self-superposition structure. By constructing a non-uniform magnetic permeability modulation environment, a multi-path magnetic field modulation relationship is formed between the two sets of winding magnetic fields, the outer rotor permanent magnet magnetic field and the inner rotor permanent magnet magnetic field in the same stator structure, making full use of the high-order spatial harmonic components.

[0069] (3) The present invention sets the outer winding and the inner winding together on the same stator, and uses the main tooth, the first auxiliary tooth and the second auxiliary tooth to form different magnetic field action areas, thereby realizing the integration of the dual-port motor structure.

[0070] (4) This invention utilizes the fundamental modulation relationship of the permanent magnet magnetic field of the outer rotor and the high-order spatial harmonic modulation relationship of the permanent magnet magnetic field of the inner rotor to achieve the synergistic effect of fundamental magnetic field modulation and high-order harmonic magnetic field modulation, thereby improving the utilization rate of permanent magnet magnetic field.

[0071] (5) This invention establishes , , The three sets of magnetic field matching relationships enable the magnetic fields at different ports to be effectively coupled through corresponding modulation paths.

[0072] (6) The present invention adopts a Heilbeck alternating pole permanent magnet structure as the excitation method of the inner rotor, which improves the magnetic field concentration capability of the inner rotor and, combined with high-order space harmonic modulation, can realize independent electromechanical energy conversion and power transfer between the two electromechanical ports.

Claims

1. A brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition, characterized in that, It includes a stator (1), an outer winding (2), an inner winding (3), an outer rotor (4), and an inner rotor (5); The stator (1) adopts a non-uniform split tooth structure. The stator (1) includes a main tooth (1-1), a first auxiliary tooth (1-2), and a second auxiliary tooth (1-3) that are uniformly distributed along the circumference. The first auxiliary tooth (1-2) and the second auxiliary tooth (1-3) are both formed by splitting the main tooth (1-1) at the end near the air gap. The stator forms a non-uniform magnetic permeability modulation structure composed of different numbers of split auxiliary teeth. The outer winding (2) and the inner winding (3) are both set on the stator (1). The outer winding (2) is set in the stator slot formed by the main teeth (1-1) and forms a five-phase armature winding by means of left and right winding. The inner winding (3) is set in the split slot formed by the first auxiliary tooth (1-2) and the second auxiliary tooth (1-3), and a three-phase armature winding is formed by high and low winding method; The outer rotor (4) is coaxially disposed between the stator (1) and the inner rotor (5). The outer rotor (4) includes a tangential excitation permanent magnet (4-1) and a magnetic adjustment ring (4-2) disposed between adjacent tangential excitation permanent magnets (4-1). The tangential excitation permanent magnets (4-1) are alternately magnetized along the circumferential direction to generate the permanent magnet magnetic field of the outer rotor. The magnetic adjustment ring (4-2) is used to modulate the permanent magnet magnetic field of the outer rotor and the armature magnetic field of the stator. The outer rotor (4) has both permanent magnet excitation function and magnetic field modulation function. Through the interaction of the magnetic ring (4-2) and the non-uniform split tooth structure of the stator, it realizes spatial harmonic modulation and matching between magnetic fields with different pole pairs. The inner rotor (5) is located inside the outer rotor (4). The inner rotor (5) includes permanent magnet units arranged alternately along the circumferential direction. The permanent magnet units adopt a Heilbeck alternating pole excitation structure. The outer winding (2), inner winding (3), tangential excitation permanent magnet (4-1) and permanent magnet unit in the inner rotor work together to achieve magnetic field modulation self-superposition through the non-uniform periodic magnetic permeability formed by the non-uniform split tooth structure.

2. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition as described in claim 1, characterized in that, The motor satisfies the following formula: in, Let be the number of pole pairs of the inner winding (3). Let be the number of pole pairs of the tangentially excited permanent magnet (4-1). This is the total number of the first set of teeth (1-2) and the second set of teeth (1-3).

3. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 2, characterized in that, The motor satisfies the following formula: in, Let be the number of pole pairs of the outer winding (2). To adjust the number of magnetic rings (4-2), and .

4. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 3, characterized in that, The motor satisfies the following formula: in, Let be the number of permanent magnet pole pairs of the inner rotor (5). The spatial harmonic order is generated after the permanent magnet magnetic field of the inner rotor is modulated by the non-uniform split tooth structure.

5. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 4, characterized in that, After the permanent magnet magnetic field of the outer rotor, the permanent magnet magnetic field of the inner rotor, and the armature magnetic field generated by the outer winding (2) and the inner winding (3) are respectively subjected to the composite magnetic permeability modulation effect formed by the magnetic ring (4-2) and the stator (1), spatial harmonic magnetic field components with different pole pairs are generated in the air gap space. The spatial harmonic magnetic field components from different sources establish synchronous coupling relationship with the corresponding armature magnetic field or permanent magnet magnetic field through the pole pair matching relationship, so that the effective magnetic field components generated by multiple magnetic field modulation paths participate in electromechanical energy conversion in the same air gap magnetic field environment, thereby forming a magnetic field modulation self-superposition effect.

6. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 1, characterized in that, There are 10 main teeth (1-1), of which 5 main teeth (1-1) have two first auxiliary teeth (1-2) at their ends, and the other 5 main teeth (1-1) have four second auxiliary teeth (1-3) at their ends, so that different main teeth correspond to different numbers of split auxiliary teeth.

7. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 6, characterized in that, In the non-uniform split tooth structure, the main tooth (1-1) with two first auxiliary teeth (1-2) and the main tooth (1-1) with four second auxiliary teeth (1-3) are alternately distributed along the circumferential direction of the stator, so that a non-uniform magnetic permeability distribution with different spatial periods is formed on the air gap side of the stator, which is used to generate multi-order spatial magnetic permeability harmonic components and realize the modulation coupling between magnetic fields with different pole pairs.

8. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 1, characterized in that, The outer winding (2) and the inner winding (3) serve as the first electrical port and the second electrical port, respectively. The outer rotor (4) and the inner rotor (5) serve as two mechanical energy transmission ends. Through the magnetic field modulation relationship formed between the stator (1), the outer rotor magnetic ring (4-2) and the permanent magnet magnetic field, the energy conversion between electrical energy and mechanical energy and between the two electrical ports is realized.

9. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 8, characterized in that, The motor has at least the following operating modes: 1) Dual electric operation mode: The outer winding (2) and the inner winding (3) are connected to the external power supply respectively. The two electrical ports are simultaneously input with electrical energy and drive the outer rotor (4) and the inner rotor (5) to rotate through the corresponding magnetic field modulation relationship, so as to realize the dual mechanical port output; 2) Dual power generation operation mode: The outer rotor (4) and the inner rotor (5) input mechanical energy, and through the magnetic field coupling between the permanent magnet field of the outer rotor and the permanent magnet field of the inner rotor and the stator winding respectively, the outer winding (2) and the inner winding (3) output electrical energy simultaneously. 3) Power transfer operation mode: Power is input into one electrical port, and after being modulated and superimposed by the magnetic field, power is output from the other electrical port through the coupling relationship between the mechanical port and the other electrical port. 4) Power distribution operation mode: By adjusting the current amplitude, frequency and phase of the outer winding (2) and the inner winding (3), the power distribution and operation status adjustment between the two mechanical ports can be realized.

10. The brushless dual-electromechanical-port motor based on non-uniform split-tooth magnetic field modulation self-superposition according to claim 4, characterized in that, The electrical frequency of the outer winding (2) and the electrical frequency of the inner winding (3) They respectively satisfy: in, and The mechanical speeds of the outer rotor (4) and the inner rotor (5) are respectively.

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