Z-type magnetic brushless double-port motor composite integrated magnetic gear drive system

Abstract

A Z-shaped magnetic flux brushless double-port motor composite integrated magnetic gear drive system, comprising a stator, an outer modulation winding, an inner modulation winding, an outer rotor, an inner rotor and an output low-speed rotor; the stator, the outer rotor and the inner rotor are assembled in a coaxial sleeve structure, the stator is located on the radial outer side, the outer rotor is arranged between the stator and the inner rotor; the inner rotor is arranged on the radial inner side of the outer rotor; the stator adopts a split tooth structure, comprising main teeth and auxiliary teeth arranged at intervals in the circumferential direction; the outer rotor comprises outer rotor permanent magnets and Z-shaped axial magnetic flux blocks arranged alternately in the circumferential direction; the Z-shaped axial magnetic flux block comprises a radial magnetic flux part extending in the radial direction and an axial magnetic flux part extending in the axial direction. The present application can realize high integration of the motor and the magnetic gear structure on the basis of ensuring the independent magnetic field modulation capability of the double-port motor, reduce the repeated use of magnetic components, and improve the power density and transmission reliability of the new energy vehicle electric drive system.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a composite integrated magnetic gear drive system for a Z-type magnetic brushless dual-port motor. Background Technology

[0002] With the rapid development of the new energy vehicle industry, electric drive systems, as the core components for achieving efficient energy conversion and power output in new energy vehicles, are evolving towards higher power density, higher efficiency, higher reliability, and more integrated structures. Traditional new energy vehicle electric drive systems typically employ an independent arrangement of the motor and mechanical reduction mechanism, using mechanical gears to achieve speed regulation and torque amplification. However, mechanical gear transmissions suffer from problems such as contact wear, lubrication requirements, vibration and noise, and high maintenance costs. Furthermore, the separate arrangement of the motor and reduction mechanism increases the axial dimension of the system, limiting further integration of new energy vehicle power systems.

[0003] To improve the integration of electric drive systems, novel electromagnetic drive technologies such as magnetic gear motors, field-modulated motors, and two-port motors have received widespread attention in recent years. Among these, magnetic gear motors utilize the principle of field modulation to achieve non-contact torque transmission, offering advantages such as no mechanical wear, low operating noise, and high reliability. Field-modulated motors achieve low-speed, high-torque output by modulating harmonics, effectively increasing motor power density. However, existing magnetic gear motors typically employ an independent magnetic ring structure, resulting in low magnetic circuit reuse, complex structure, and large axial dimensions between the motor and gear components.

[0004] On the other hand, dual-port motors can achieve energy conversion and power distribution between different magnetic field sources through multiple winding ports, which has potential application value in hybrid power, multi-energy coupled drive of electric vehicles, and intelligent electric drive systems. However, existing dual-port motors usually require independent magnetic field modulation structures, and the high degree of magnetic field coupling between different electrical ports can easily lead to problems such as complex magnetic circuits, reduced modulation efficiency, and increased system size.

[0005] Therefore, how to achieve a high degree of integration between the motor and the magnetic gear structure while ensuring the independent magnetic field modulation capability of the dual-port motor, reducing the reuse of magnetic components, and improving the power density and transmission reliability of the electric drive system of new energy vehicles has become an urgent problem to be solved in the field of electromagnetic transmission. Summary of the Invention

[0006] Based on this, the present invention provides a Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, which achieves a high degree of integration between the motor and the magnetic gear structure while ensuring the independent magnetic field modulation capability of the dual-port motor, reducing the reuse of magnetic components, and improving the power density and transmission reliability of the electric drive system of new energy vehicles.

[0007] A Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system includes a stator, an outer modulation winding, an inner modulation winding, an outer rotor, an inner rotor, and an output low-speed rotor; the stator, outer rotor, and inner rotor are assembled using a coaxial sleeve structure, with the outer rotor positioned between the stator and the inner rotor; the output low-speed rotor is arranged axially at the corresponding position of the outer rotor, forming an axial magnetic field coupling relationship with the outer rotor; The stator adopts a split tooth structure, including main teeth and auxiliary teeth spaced apart along the circumference. The outer modulation winding is wound on the main teeth and the inner modulation winding is wound on the auxiliary teeth to form a brushless dual-port motor with two independent power ports, thereby realizing independent modulation of the magnetic field channels of the two power ports. The outer rotor includes an outer rotor permanent magnet and a Z-shaped axial guide magnet, which are arranged alternately along the circumference. The outer rotor permanent magnet is magnetized in a tangential manner to provide the excitation magnetic field of the brushless dual-port motor. The Z-type axial magnetic guide block includes a radial magnetic guide portion extending in the radial direction and an axial magnetic guide portion extending in the axial direction. The radial magnetic guide portion is used for magnetic field modulation of the first electrical port of the brushless dual-port motor. The axial magnetic guide portion serves as a magnetic gear adjusting ring, forming an axial magnetic gear with the inner rotor and the output low-speed rotor. The inner rotor, the Z-type axial magnetic guide block, and the output low-speed rotor form a magnetic field coupling relationship in the axial direction, together forming a differential magnetic gear structure. The output low-speed rotor serves as the output end of the differential magnetic gear.

[0008] The aforementioned Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system comprises an outer rotor permanent magnet fixedly connected to a Z-type axial guide magnet to form an outer rotor; the Z-type axial guide magnet extends axially to form an axial magnetic circuit connection structure, with its axial extension end corresponding to the output low-speed rotor, thus forming an axial air gap between the output low-speed rotor and the Z-type axial guide magnet; the output low-speed rotor is arranged axially on one side of the Z-type axial guide magnet and, together with the inner rotor, participates in the coupling of the modulated magnetic field generated by the Z-type axial guide magnet to form an axial magnetic gear transmission structure.

[0009] The aforementioned Z-type magnetically guided brushless dual-port motor composite integrated magnetic gear drive system comprises an outer modulation winding corresponding to the first electrical port of the brushless dual-port motor. The first electrical port is formed by the outer modulation winding, the inner rotor, and the Z-type axial guide magnet in the outer rotor, creating a magnetic field modulation circuit. The inner rotor is equipped with a permanent magnet structure arranged circumferentially to generate a pole pair number of... The rotating permanent magnet magnetic field generated by the inner rotor is spatially modulated by the radial magnetic guide portion of the Z-shaped axial guide magnet to form a working harmonic magnetic field that matches the number of pole pairs of the outer modulation winding, and induces an electromotive force in the outer modulation winding; wherein, the radial magnetic guide portion of the Z-shaped axial guide magnet serves as the magnetic field modulation unit of the first electrical port, and the number of pole pairs of the outer modulation winding... Number of pole pairs of the internal rotor permanent magnet and the number of Z-axis guide magnets satisfy:

[0010] This is to achieve the conversion of the inner rotor permanent magnet magnetic field to the working magnetic field of the outer modulation winding.

[0011] The aforementioned Z-type magnetically guided brushless dual-port motor composite integrated magnetic gear drive system includes an inner modulation winding corresponding to the second electrical port of the brushless dual-port motor. The second electrical port is composed of the inner modulation winding, the outer rotor permanent magnet, and the stator auxiliary teeth, forming a magnetic field modulation circuit. The outer rotor permanent magnet is tangentially magnetized and alternately arranged along the circumferential direction to generate a pole pair number of... The rotating permanent magnet magnetic field, generated by the outer rotor permanent magnet, is modulated by the periodic spatial magnetic permeability formed by the stator's auxiliary teeth, producing a working magnetic field that matches the inner modulation winding; wherein, the stator's auxiliary teeth serve as the spatial magnetic permeability modulation unit of the second electrical port, and the number of pole pairs of the inner modulation winding... Number of pole pairs of external rotor permanent magnet and the number of auxiliary teeth of the stator satisfy:

[0012] This enables magnetic field modulation and electromagnetic energy conversion between the permanent magnet field of the outer rotor and the inner modulation winding.

[0013] The aforementioned Z-type magnetically guided brushless dual-electric-port motor composite integrated magnetic gear drive system includes a brushless dual-electric-port motor comprising a first magnetic field modulation channel and a second magnetic field modulation channel that are independent of each other. The first magnetic field modulation channel consists of an inner rotor permanent magnet magnetic field, a radial magnetic field guiding part of a Z-type axial guide magnet, and an outer modulation winding. The second magnetic field modulation channel consists of an outer rotor permanent magnet magnetic field, a stator auxiliary tooth spatial magnetic field, and an inner modulation winding. The first and second magnetic field modulation channels utilize different magnetic field sources and modulation units to achieve independent magnetic field modulation between the two electrical ports, enabling the outer modulation winding and the inner modulation winding to form independent electrical energy input or output ports.

[0014] In the aforementioned Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, the output low-speed rotor is axially positioned on one side of the Z-type axial guide magnet. The Z-type axial guide magnet acts as the adjusting ring of the axial magnetic gear, modulating the axial magnetic field generated by the inner rotor and the axial magnetic field generated by the output low-speed rotor, thereby forming magnetic field coupling and torque transmission between the inner rotor and the output low-speed rotor. The axial magnetic gear achieves speed conversion and torque transmission between the inner rotor and the output low-speed rotor through a non-mechanical connection.

[0015] The aforementioned Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, wherein the magnetic pole matching relationship of the axial magnetic gear is jointly determined by the Z-type axial guide magnet, the inner rotor, and the output low-speed rotor; wherein the number of Z-type axial guide magnets... Number of pole pairs of the internal rotor permanent magnet and the number of low-speed rotor pole pairs satisfy:

[0016] This allows the Z-shaped axial guide magnet to effectively modulate the magnetic field of the inner rotor and the magnetic field of the output low-speed rotor, thereby achieving stable axial magnetic gear transmission.

[0017] The aforementioned Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system features an output low-speed rotor that employs a Halbach array permanent magnet structure. The permanent magnets in the output low-speed rotor are arranged along the circumference in a Halbach magnetization manner to enhance the effective magnetic field toward the Z-type axial guide magnet block side, thereby improving the magnetic field coupling capability and torque transmission capability of the axial magnetic gear.

[0018] The aforementioned Z-shaped magnetic brushless dual-port motor composite integrated magnetic gear drive system comprises a Z-shaped axial guide magnet that rotates synchronously with the outer rotor and serves as the moving magnetic adjusting ring in the differential magnetic gear. The inner rotor, Z-shaped axial guide magnet, and output low-speed rotor respectively act as the input rotor, magnetic adjusting rotor, and output rotor in the differential magnetic gear. The axial magnetic field is spatially modulated by the Z-shaped axial guide magnet, achieving magnetic coupling between the three moving components. The number of permanent magnet pole pairs in the inner rotor... Internal rotor speed Output low-speed rotor pole pairs Output low-speed rotor speed Number of Z-shaped axis guide magnets Rotation speed of external rotor and Z-shaped shaft guide magnet Satisfy the motion relationship of differential magnetic gears:

[0019] This enables non-mechanical speed conversion and torque transmission between the inner rotor and the output low-speed rotor.

[0020] In the aforementioned Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, the operating frequency of the first electrical port corresponding to the outer modulation winding is determined by the combined magnetic field modulated by the rotating magnetic field generated by the outer rotor permanent magnet and the rotating magnetic field generated by the inner rotor permanent magnet through the radial magnetic guiding part of the Z-type axial magnetic guide block, satisfying the following:

[0021] in, The electrical frequency of the external modulation winding; The operating frequency of the second electrical port corresponding to the internal modulation winding is determined by the rotating magnetic field of the outer rotor permanent magnet after being modulated by the spatial magnetic permeability of the stator auxiliary teeth, satisfying the following:

[0022] in, The frequency of the internal modulation winding.

[0023] The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system provided by the present invention has the following advantages: 1. This invention achieves integrated dual-port motor structure. The invention employs a split-tooth stator structure, with external modulation windings and internal modulation windings arranged on the main and auxiliary teeth respectively, so that the two electrical ports correspond to different magnetic field modulation paths, achieving independent energy conversion at both ports.

[0024] 2. This invention proposes a Z-type axial magnetic guide structure reuse technology. The Z-type axial magnetic guide block in this invention has both radial and axial magnetic adjustment functions. The radial magnetic guide part is used for magnetic field modulation of the first electrical port of the brushless dual-electric-port motor, and the axial magnetic guide part participates in the axial magnetic gear operation as a magnetic gear adjustment ring, realizing the multi-functional reuse of a single magnetic structure.

[0025] 3. This invention achieves an integrated design of the motor and magnetic gear. While ensuring the independent magnetic field modulation capability of the dual-port motor, it realizes a high degree of integration between the motor and magnetic gear structures, reducing the reuse of magnetic components. By applying the Z-shaped axial magnetizing structure to both the electromagnetic conversion and magnetic transmission processes, it reduces the structural redundancy caused by setting separate magnetizing components for the traditional motor and magnetic gear, thus improving the integration of the composite system.

[0026] 4. This invention improves the output performance of the magnetic gear. The low-speed output rotor of this invention adopts a Halbach permanent magnet structure, which increases the magnetic field strength on the effective working side, enhances the magnetic field coupling capability of the axial magnetic gear, and achieves highly reliable non-contact torque transmission.

[0027] 5. This invention is applicable to highly integrated electric drive systems for new energy vehicles. Through the high integration of the motor, magnetic adjustment structure, and magnetic gear transmission structure, this invention can reduce the wear and noise problems caused by traditional mechanical reduction structures, providing a new technical solution for high power density and high reliability electric drive systems for new energy vehicles. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system 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 external modulation winding structure; Figure 4 This is a schematic diagram of the internal modulation winding structure; Figure 5 This is a schematic diagram of the external rotor structure; Figure 6 A schematic diagram of the structure of a Z-shaped axial guide magnet; Figure 7 This is a schematic diagram of the internal rotor structure; Figure 8 A schematic diagram of the structure of the low-speed output rotor; Figure 9 This is a schematic diagram of the tangential magnetization method for the external rotor permanent magnet; Figure 10 This is a schematic diagram of the tangential magnetization method of the internal rotor permanent magnet; Figure 11 A schematic diagram of the Halbach array excitation method for low-speed rotor output; Figure 12 This is a schematic diagram of the air gap magnetic flux density analysis path of the drive transmission system in this invention; Figure 13 Comparison of axial air gap magnetic flux density waveforms at point a along the circumferential path; Figure 14 The FFT spectrum analysis diagram of the axial air gap magnetic flux density at point a along the circumferential path is shown. Figure 15 Comparison of radial air gap magnetic flux density waveforms at point b along the circumferential path; Figure 16 The FFT spectrum analysis diagram of the radial air gap magnetic flux density at point b along the circumferential path is shown. Figure 17 The waveform of the axial air gap magnetic flux density at point c along the circumferential path is shown. Figure 18 The image shows the FFT spectrum analysis of the axial air gap magnetic flux density at point c along the circular path. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] Please see Figures 1 to 11 The present invention provides a Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, including a stator 1, an outer modulation winding 2, an inner modulation winding 3, an outer rotor 4, an inner rotor 5, and an output low-speed rotor 6; the stator 1, the outer rotor 4, and the inner rotor 5 are assembled using a coaxial sleeve structure, with the stator 1 located on the radially outer side and the outer rotor 4 disposed between the stator 1 and the inner rotor 5; the inner rotor 5 is disposed on the radially inner side of the outer rotor 4; the output low-speed rotor 6 is arranged axially at the corresponding position of the outer rotor 4, forming an axial magnetic field coupling relationship with the outer rotor 4.

[0032] The stator 1 adopts a split tooth structure, including a main tooth 1-1 and a secondary tooth 1-2 spaced apart along the circumference. The outer modulation winding 2 is wound on the main tooth 1-1, and the inner modulation winding 3 is wound on the secondary tooth 1-2 to form a brushless dual-port motor with two independent power ports, thereby realizing independent modulation of the magnetic field channels of the two power ports.

[0033] The outer rotor 4 includes outer rotor permanent magnets 4-1 arranged alternately along the circumference and Z-shaped axial guide magnets 4-2. Please refer to the following for details. Figure 9 , Figure 9 The arrows in the diagram indicate the magnetization direction of the permanent magnet. The outer rotor permanent magnet 4-1 adopts a tangential magnetization method to provide the excitation magnetic field for the brushless dual-port motor.

[0034] Specifically, the number of 4-1 pole pairs of the external rotor permanent magnet Quantity of Z-type axis guide magnets 4-2 satisfy: .

[0035] The Z-type axial magnetic guide block 4-2 includes a radial magnetic guide portion extending in the radial direction and an axial magnetic guide portion extending in the axial direction.

[0036] The radial magnetic guide portion is located between the stator 1 and the inner rotor 5, and is used for magnetic field modulation of the first electrical port of the brushless dual-port motor. The axial magnetic guide portion extends axially to the corresponding position of the output low-speed rotor 6, and is used to form an axial magnetic flux path; the axial magnetic guide portion acts as a magnetic gear adjusting ring, and together with the inner rotor 5 and the output low-speed rotor 6, it forms an axial magnetic gear; the inner rotor 5, the Z-shaped axial magnetic guide block 4-2, and the output low-speed rotor 6 form a magnetic field coupling relationship along the axial direction, and together they form a differential magnetic gear structure, with the output low-speed rotor 6 serving as the output end of the differential magnetic gear.

[0037] Through the radial and axial reuse structure of the Z-shaped axial guide magnet 4-2, the outer rotor 4 can simultaneously undertake the magnetic field modulation function of the dual-port motor and the magnetic field modulation function of the magnetic gear.

[0038] Specifically, the outer rotor permanent magnet 4-1 is fixedly connected to the Z-type axial guide magnetic block 4-2 to form the outer rotor 4; the Z-type axial guide magnetic block 4-2 extends along the axial direction to form an axial magnetic circuit connection structure, and its axial extension end is correspondingly set with the output low-speed rotor 6, so that an axial air gap is formed between the output low-speed rotor 6 and the Z-type axial guide magnetic block 4-2; the output low-speed rotor 6 is arranged axially on one side of the Z-type axial guide magnetic block 4-2, and together with the inner rotor 5, participates in the coupling of the modulated magnetic field generated by the Z-type axial guide magnetic block 4-2 to form an axial magnetic gear transmission structure.

[0039] Both the external modulation winding 2 and the internal modulation winding 3 adopt a three-phase AC winding structure, forming the first three-phase electrical port and the second three-phase electrical port respectively. The external modulation winding 2 and the internal modulation winding 3 are arranged independently in space. The magnetic field decoupling and independent energy conversion between the two three-phase windings are realized through the separation structure of the main tooth 1-1 and the auxiliary tooth 1-2 of the stator 1.

[0040] The external modulation winding 2 corresponds to the first electrical port of the brushless dual-port motor. The first electrical port forms a magnetic field modulation circuit together with the external modulation winding 2, the inner rotor 5, and the Z-shaped axial guide magnet 4-2 in the outer rotor 4. Please refer to the following for details. Figure 10 , Figure 10 The arrows indicate the magnetization direction of the permanent magnets. The inner rotor 5 is equipped with a permanent magnet structure arranged along the circumference to generate a pole pair number of... The rotating permanent magnet magnetic field generated by the inner rotor 5 is spatially modulated by the radial magnetic guide portion of the Z-shaped axial magnetic guide block 4-2, forming a working harmonic magnetic field that matches the number of pole pairs of the outer modulation winding 2, and generating an induced electromotive force in the outer modulation winding 2; wherein, the radial magnetic guide portion of the Z-shaped axial magnetic guide block 4-2 serves as the magnetic field modulation unit of the first electrical port, and the number of pole pairs of the outer modulation winding 2... 5 permanent magnet pole pairs in the inner rotor and the number of Z-shaped axial guide magnets 4-2 satisfy:

[0041] This is to achieve the conversion of the permanent magnet magnetic field of the inner rotor 5 to the working magnetic field of the outer modulation winding 2.

[0042] The inner modulation winding 3 corresponds to the second electrical port of the brushless dual-port motor. The second electrical port is composed of the inner modulation winding 3, the outer rotor permanent magnet 4-1, and the auxiliary teeth 1-2 of the stator 1, forming a magnetic field modulation circuit. The outer rotor permanent magnet 4-1 is tangentially magnetized and alternately arranged along the circumference to generate a number of pole pairs. The rotating permanent magnet magnetic field, the magnetic field generated by the outer rotor permanent magnet 4-1, after being periodically space-permeable modulated by the auxiliary teeth 1-2 of the stator 1, generates a working magnetic field that matches the inner modulation winding 3; wherein, the auxiliary teeth 1-2 of the stator 1 serve as the space-permeable modulation unit of the second electrical port, and the inner modulation winding 3 has a number of pole pairs External rotor permanent magnet 4-1 pole pairs and the number of auxiliary teeth 1-2 of stator 1 satisfy:

[0043] This enables magnetic field modulation and electromagnetic energy conversion between the permanent magnet field of the outer rotor and the inner modulation winding 3.

[0044] The brushless dual-port motor includes a first magnetic field modulation channel and a second magnetic field modulation channel that are independent of each other. The first magnetic field modulation channel consists of the permanent magnet magnetic field of the inner rotor 5, the radial magnetic field of the Z-shaped axial guide magnet 4-2, and the outer modulation winding 2. The second magnetic field modulation channel consists of the magnetic field of the outer rotor permanent magnet 4-1, the spatial magnetic field of the stator 1 auxiliary teeth, and the inner modulation winding 3. The first magnetic field modulation channel and the second magnetic field modulation channel use different magnetic field sources and modulation units to realize independent magnetic field modulation between the two electrical ports, so that the outer modulation winding 2 and the inner modulation winding 3 form independent electrical energy input or output ports.

[0045] The output low-speed rotor 6 is axially positioned on one side of the Z-shaped axial guide magnetic block 4-2; the Z-shaped axial guide magnetic block 4-2 acts as the adjusting ring of the axial magnetic gear, modulating the axial magnetic field generated by the inner rotor 5 and the axial magnetic field generated by the output low-speed rotor 6, so that magnetic field coupling and torque transmission are formed between the inner rotor 5 and the output low-speed rotor 6; the axial magnetic gear realizes the speed conversion and torque transmission between the inner rotor 5 and the output low-speed rotor 6 through a non-mechanical connection.

[0046] The magnetic pole matching relationship of the axial magnetic gear is determined by the Z-type axial guide magnet 4-2, the inner rotor 5, and the output low-speed rotor 6; among which, the number of Z-type axial guide magnets 4-2... 5 permanent magnet pole pairs in the inner rotor and the number of 6-pole pairs of the low-speed rotor output satisfy:

[0047] This allows the Z-shaped axial guide magnet 4-2 to effectively modulate the magnetic field of the inner rotor 5 and the magnetic field of the output low-speed rotor 6, thereby achieving stable axial magnetic gear transmission.

[0048] In this embodiment, the Z-shaped axial guide magnet 4-2 is a magnetic field modulation component shared by the brushless dual-port motor and the axial magnetic gear. The electromagnetic conversion and magnetic transmission functions are integrated through the same magnetic adjustment structure, thereby forming an integrated composite structure of motor-magnetic gear.

[0049] Please refer to this carefully. Figure 11 , Figure 11 The arrows in the diagram indicate the magnetization direction of the permanent magnets. The low-speed output rotor 6 adopts a Halbach array permanent magnet structure. The permanent magnets in the low-speed output rotor 6 are arranged in the Halbach magnetization mode along the circumference to enhance the effective magnetic field towards the Z-shaped axis guide magnet 4-2 side, thereby improving the magnetic field coupling capability and torque transmission capability of the axial magnetic gear.

[0050] The Z-shaped axial guide magnet 4-2 rotates synchronously with the outer rotor 4 and serves as the moving magnetic adjusting ring in the differential magnetic gear. The inner rotor 5, the Z-shaped axial guide magnet 4-2, and the output low-speed rotor 6 serve as the input rotor, magnetic adjusting rotor, and output rotor in the differential magnetic gear, respectively. The axial magnetic field is spatially modulated by the Z-shaped axial guide magnet 4-2, achieving magnetic field coupling between the three moving parts. The number of permanent magnet pole pairs in the inner rotor 5... 5 rotation speeds of the inner rotor Output low-speed rotor 6-pole pair Output low-speed rotor 6 speed Quantity of Z-shaped axis guide magnet 4-2 The rotational speed of the outer rotor 4 and the Z-type shaft guide magnet 4-2 Satisfy the motion relationship of differential magnetic gears:

[0051] This enables non-mechanical speed conversion and torque transmission between the inner rotor 5 and the output low-speed rotor 6.

[0052] Specifically, in this embodiment, the values ​​of the above parameters are as follows: , , , , , , .

[0053] The Z-type axial magnetic guide block 4-2 achieves magnetic circuit multiplexing through the radial magnetic guide part and the axial magnetic guide part. The radial magnetic guide part participates in the magnetic field modulation of the first electrical port of the brushless dual-electric-port motor, and the axial magnetic guide part participates in the magnetic field modulation of the differential magnetic gear, so that the same magnetic tuning structure can simultaneously realize electromagnetic energy conversion and mechanical energy transfer.

[0054] This embodiment also proposes a method for independent generation and control of dual electrical port frequencies. Two independent electrical ports are formed by an external modulation winding and an internal modulation winding, respectively, and the frequency corresponding to different electrical ports is independently generated by using a composite magnetic field modulation mechanism.

[0055] Specifically, the operating frequency of the first electrical port corresponding to the external modulation winding 2 is determined by the combined magnetic field modulated by the rotating magnetic field generated by the outer rotor permanent magnet 4-1 and the rotating magnetic field generated by the inner rotor 5 permanent magnet through the radial magnetic guide part of the Z-shaped axial guide magnet 4-2, satisfying the following:

[0056] in, The frequency of the external modulation winding 2 is denoted by .

[0057] The operating frequency of the second electrical port corresponding to the inner modulation winding 3 is determined by the rotating magnetic field of the outer rotor permanent magnet 4-1 after being modulated by the spatial magnetic permeability of the stator 1 auxiliary tooth, satisfying the following:

[0058] in, The frequency of the internal modulation winding 3 is denoted by .

[0059] Through the above-mentioned dual-channel magnetic field modulation mechanism, the independent generation of the magnetic field frequencies corresponding to the two electrical ports is realized. The frequency of the first electrical port is jointly determined by the combined motion state of the inner and outer rotors, while the frequency of the second electrical port is mainly determined by the motion state of the outer rotor. This achieves frequency decoupling control between the dual mechanical ports and the dual electrical ports, improving the power distribution flexibility and multi-condition adaptability during system operation.

[0060] The working process of the drive system in this embodiment is as follows: During the electromagnetic energy conversion process, the radial magnetic part of the Z-shaped axial guide magnet 4-2 is located between the stator 1 and the inner rotor 5. As the magnetic field modulation unit of the first electrical port of the brushless dual-electric-port motor, it performs spatial magnetic permeation modulation on the rotating permanent magnet magnetic field generated by the inner rotor 5 and forms a working harmonic magnetic field that matches the number of pole pairs of the outer modulation winding 2. At the same time, the rotating permanent magnet magnetic field generated by the outer rotor permanent magnet 4-1 is periodically spatially magnetically modulated by the auxiliary teeth 1-2, and then generates an induced electromotive force in the inner modulation winding 3 to realize the electromagnetic energy conversion of the second electrical port.

[0061] During the mechanical energy transmission process, the Z-shaped axial guide magnet 4-2 rotates synchronously with the outer rotor 4. Its axial guide magnet part acts as a motion adjusting magnet ring in the differential magnetic gear, which modulates the permanent magnet magnetic field generated by the inner rotor 5 and the output low-speed rotor 6 in the axial space, so that a stable magnetic field coupling relationship is formed between the inner rotor 5, the outer rotor 4 and the output low-speed rotor 6, realizing non-mechanical connection speed change and torque transmission.

[0062] Therefore, by using the Z-shaped axial guide magnet 4-2 radial-axial composite magnetic guide structure, the magnetic field modulation function of the brushless dual-electric port motor and the differential magnetic gear transmission function can be realized simultaneously in the same external rotor structure. This reduces the mechanical connection parts in the traditional motor and mechanical gear combination structure, improves the system integration, and is suitable for drive applications such as new energy vehicles that require high efficiency, high power density, and high torque output.

[0063] This drive system is applied to the drive device of new energy vehicles. The outer modulation winding 2 and the inner modulation winding 3 are used to realize electrical energy input, energy conversion and operation status adjustment. The output low-speed rotor 6 is used to connect the vehicle load to achieve high-efficiency low-speed high-torque output.

[0064] The external modulation winding 2 and the internal modulation winding 3 are used to realize the electrical energy input, output and energy conversion between different power ports, respectively. The differential magnetic gear structure is used to realize the non-mechanical connection adjustment between the input speed and the output speed, and to provide low-speed high torque output to the vehicle load through the output low-speed rotor 6.

[0065] To analyze the modulation effect of the Z-shaped axial magnetic field guiding structure on the radial and axial magnetic fields in this invention, relevant tests were conducted, such as... Figure 12 As shown, three circular analysis paths are set at different magnetic field transmission paths. Circular path a is located in the axial air gap region between the axial extension of the Z-shaped axial guide magnet 4-2 and the output low-speed rotor 6, and is used to analyze the axial magnetic field modulation characteristics of the differential magnetic gear; circular path b is located in the radial air gap region between the outer rotor 4 and the inner rotor 5, and is used to analyze the radial magnetic field modulation characteristics of the first electrical port of the brushless dual-electric-port motor; circular path c is located in the axial air gap region between the other axial end of the Z-shaped axial guide magnet 4-2 and the output low-speed rotor 6, and is used to further analyze the working magnetic field characteristics of the axial magnetic gear.

[0066] like Figure 13 and Figure 14 The figures show the air gap magnetic flux density waveform and FFT spectrum analysis results at circumferential path a. Since circumferential path a is located in the axial air gap region between the Z-shaped axial guide magnet 4-2 and the output low-speed rotor 6, this region mainly reflects the magnetic field modulation process of the differential magnetic gear. Figure 13 It can be seen that, compared to traditional structures (i.e., traditional brushless dual-port motor composite magnetic gears), this invention can form a stable, periodically varying axial air gap magnetic flux density waveform. Figure 14 The spectrum analysis results show that the air gap magnetic flux density at the circumferential path a contains multiple spatial harmonic components. Among them, the effective modulation harmonics that match the number of 6 pole pairs of the output low-speed rotor and the number of Z-type axial guide magnetic blocks 4-2 occupy the main components, indicating that the Z-type axial guide magnetic blocks 4-2 can effectively modulate the axial magnetic field and realize the magnetic field coupling of the differential magnetic gear.

[0067] like Figure 15 and Figure 16 The figures show the air gap magnetic flux density waveform and FFT spectrum analysis results at the circumferential path b. Since the circumferential path b is located between the outer rotor 4 and the inner rotor 5, its magnetic field is mainly formed by the modulation of the permanent magnet magnetic field of the inner rotor 5 through the radial magnetic guiding part of the Z-shaped axial guide magnet 4-2. Figure 15 It can be seen that both the present invention and the traditional structure (i.e., the traditional brushless dual-port motor composite magnetic gear) can form a periodic radial air gap magnetic field, indicating that the original magnetic field modulation function of the dual-port motor can still be maintained after adopting the Z-shaped axial guide magnet 4-2. Figure 16 It can be seen that the main harmonic components of the present invention are concentrated near the number of working pole pairs corresponding to the outer modulation winding 2, which verifies that the radial magnetic part of the Z-shaped axial magnetic guide block 4-2 can realize the conversion of the permanent magnet magnetic field of the inner rotor 5 to the working magnetic field of the outer modulation winding 2.

[0068] like Figure 17 and Figure 18 The figures show the air gap magnetic flux density waveform and FFT spectrum analysis results at point c along the circumferential path. The axial air gap region located between the Z-shaped axial guide magnet 4-2 and the output low-speed rotor 6 mainly reflects the axial magnetic field modulation characteristics of the differential magnetic gear section.

[0069] Because the magnetic adjustment structure in traditional brushless dual-port motors is mainly used for radial air gap magnetic field modulation, its modulation magnetic field path is concentrated in the electromagnetic energy conversion process of the motor, making it difficult to directly achieve axial magnetic field transmission. This invention, by setting an axially extending magnetic guide portion in the magnetic adjustment structure of the outer rotor 4, allows the Z-shaped axial guide magnet 4-2 to further establish an axial magnetic flux transmission path while maintaining the radial magnetic field modulation function.

[0070] Depend on Figure 17 It can be seen that a stable axial air gap magnetic flux density waveform can be formed at the circumferential path c, indicating that the axial magnetic flux guiding part of the Z-type axial magnetic guide block 4-2 can effectively transmit the axial magnetic field generated by the low-speed rotor 6. Meanwhile, from Figure 18 The FFT analysis results show that the regional air gap magnetic flux density contains effective spatial harmonic components corresponding to the magnetic pole matching relationship of the differential magnetic gear, indicating that the axial magnetic guide part can effectively modulate the axial magnetic field and realize the magnetic field coupling between the inner rotor 5, the Z-type axial magnetic guide block 4-2 and the output low-speed rotor 6.

[0071] In summary, the Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system provided by the present invention has the following beneficial effects: 1. This invention achieves integrated dual-port motor structure. The invention employs a split-tooth stator structure, with external modulation windings and internal modulation windings arranged on the main and auxiliary teeth respectively, so that the two electrical ports correspond to different magnetic field modulation paths, achieving independent energy conversion at both ports.

[0072] 2. This invention proposes a Z-type axial magnetic guide structure reuse technology. The Z-type axial magnetic guide block in this invention has both radial and axial magnetic adjustment functions. The radial magnetic guide part is used for magnetic field modulation of the first electrical port of the brushless dual-electric-port motor, and the axial magnetic guide part participates in the axial magnetic gear operation as a magnetic gear adjustment ring, realizing the multi-functional reuse of a single magnetic structure.

[0073] 3. This invention achieves an integrated design of the motor and magnetic gear. While ensuring the independent magnetic field modulation capability of the dual-port motor, it realizes a high degree of integration between the motor and magnetic gear structures, reducing the reuse of magnetic components. By applying the Z-shaped axial magnetizing structure to both the electromagnetic conversion and magnetic transmission processes, it reduces the structural redundancy caused by setting separate magnetizing components for the traditional motor and magnetic gear, thus improving the integration of the composite system.

[0074] 4. This invention improves the output performance of the magnetic gear. The low-speed output rotor of this invention adopts a Halbach permanent magnet structure, which increases the magnetic field strength on the effective working side, enhances the magnetic field coupling capability of the axial magnetic gear, and achieves highly reliable non-contact torque transmission.

[0075] 5. This invention is applicable to highly integrated electric drive systems for new energy vehicles. Through the high integration of the motor, magnetic adjustment structure, and magnetic gear transmission structure, this invention can reduce the wear and noise problems caused by traditional mechanical reduction structures, providing a new technical solution for high power density and high reliability electric drive systems for new energy vehicles.

Claims

1. A Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system, characterized in that, It includes a stator (1), an outer modulation winding (2), an inner modulation winding (3), an outer rotor (4), an inner rotor (5), and an output low-speed rotor (6); the stator (1), the outer rotor (4), and the inner rotor (5) are assembled using a coaxial sleeve structure, with the outer rotor (4) positioned between the stator (1) and the inner rotor (5); the output low-speed rotor (6) is arranged axially at the corresponding position of the outer rotor (4), forming an axial magnetic field coupling relationship with the outer rotor (4); The stator (1) adopts a split tooth structure, including main teeth and auxiliary teeth spaced apart along the circumferential direction. The outer modulation winding (2) is wound on the main teeth, and the inner modulation winding (3) is wound on the auxiliary teeth to form a brushless dual-port motor with two independent power ports, thereby realizing independent modulation of the magnetic field channels of the two power ports. The outer rotor (4) includes an outer rotor permanent magnet (4-1) and a Z-shaped axial guide magnet (4-2) arranged alternately along the circumference. The outer rotor permanent magnet (4-1) adopts a tangential magnetization method to provide the excitation magnetic field of the brushless dual-port motor. The Z-type axial guide magnet (4-2) includes a radial magnetic guide part extending in the radial direction and an axial magnetic guide part extending in the axial direction. The radial magnetic guide part is used for magnetic field modulation of the first electrical port of the brushless dual-electric-port motor. The axial magnetic guide part serves as a magnetic gear adjusting ring and forms an axial magnetic gear with the inner rotor (5) and the output low-speed rotor (6). The inner rotor (5), the Z-type axial guide magnet (4-2), and the output low-speed rotor (6) form a magnetic field coupling relationship in the axial direction and together form a differential magnetic gear structure. The output low-speed rotor (6) serves as the output end of the differential magnetic gear.

2. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 1, characterized in that, The outer rotor permanent magnet (4-1) is fixedly connected to the Z-shaped axial guide magnetic block (4-2) to form the outer rotor (4); the Z-shaped axial guide magnetic block (4-2) extends along the axial direction to form an axial magnetic circuit connection structure, and its axial extension end is correspondingly set with the output low speed rotor (6), so that an axial air gap is formed between the output low speed rotor (6) and the Z-shaped axial guide magnetic block (4-2); the output low speed rotor (6) is arranged axially on one side of the Z-shaped axial guide magnetic block (4-2), and together with the inner rotor (5), participates in the coupling of the modulated magnetic field generated by the Z-shaped axial guide magnetic block (4-2) to form an axial magnetic gear transmission structure.

3. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 1, characterized in that, The external modulation winding (2) corresponds to the first electrical port of the brushless dual-port motor. The first electrical port is formed by the external modulation winding (2), the inner rotor (5), and the Z-shaped axial guide magnet (4-2) in the outer rotor (4) to form a magnetic field modulation circuit. The inner rotor (5) is provided with a permanent magnet structure arranged along the circumferential direction to generate a number of pole pairs. The rotating permanent magnet magnetic field generated by the inner rotor (5) is spatially modulated by the radial magnetic part of the Z-shaped axial guide magnet (4-2) to form a working harmonic magnetic field that matches the number of pole pairs of the outer modulation winding (2), and an induced electromotive force is generated in the outer modulation winding (2); wherein, the radial magnetic part of the Z-shaped axial guide magnet (4-2) serves as the magnetic field modulation unit of the first electrical port, and the number of pole pairs of the outer modulation winding (2) is... Number of permanent magnet pole pairs in the inner rotor (5) and the number of Z-shaped axial guide magnets (4-2) satisfy: To achieve the conversion of the permanent magnet magnetic field of the inner rotor (5) to the working magnetic field of the outer modulation winding (2).

4. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 3, characterized in that, The inner modulation winding (3) corresponds to the second electrical port of the brushless dual-port motor. The second electrical port is composed of the inner modulation winding (3), the outer rotor permanent magnet (4-1), and the secondary teeth of the stator (1) forming a magnetic field modulation circuit. The outer rotor permanent magnet (4-1) is alternately arranged along the circumference using a tangential magnetization method to generate a number of pole pairs. The rotating permanent magnet magnetic field, the magnetic field generated by the outer rotor permanent magnet (4-1), after being periodically spaced by the auxiliary teeth of the stator (1) to form a working magnetic field that matches the inner modulation winding (3); wherein, the auxiliary teeth of the stator (1) serve as the spaced magnetic field modulation unit of the second electrical port, and the inner modulation winding (3) has a number of pole pairs Number of pole pairs of the external rotor permanent magnet (4-1) and the number of auxiliary teeth of stator (1) satisfy: To achieve magnetic field modulation and electromagnetic energy conversion between the permanent magnet field of the outer rotor and the inner modulation winding (3).

5. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 4, characterized in that, The brushless dual-port motor includes a first magnetic field modulation channel and a second magnetic field modulation channel that are independent of each other. The first magnetic field modulation channel is composed of the permanent magnet magnetic field of the inner rotor (5), the radial magnetic field of the Z-shaped axial guide magnet (4-2), and the outer modulation winding (2). The second magnetic field modulation channel is composed of the magnetic field of the permanent magnet of the outer rotor (4-1), the spatial magnetic field of the auxiliary teeth of the stator (1), and the inner modulation winding (3). The first magnetic field modulation channel and the second magnetic field modulation channel use different magnetic field sources and modulation units to realize independent magnetic field modulation between the two electrical ports, so that the outer modulation winding (2) and the inner modulation winding (3) form independent electrical energy input or output ports.

6. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 5, characterized in that, The output low-speed rotor (6) is axially positioned on one side of the Z-shaped axial guide magnetic block (4-2); the Z-shaped axial guide magnetic block (4-2) acts as the adjusting ring of the axial magnetic gear, modulating the axial magnetic field generated by the inner rotor (5) and the axial magnetic field generated by the output low-speed rotor (6), so that magnetic field coupling and torque transmission are formed between the inner rotor (5) and the output low-speed rotor (6); the axial magnetic gear realizes the speed conversion and torque transmission between the inner rotor (5) and the output low-speed rotor (6) through a non-mechanical connection.

7. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 6, characterized in that, The magnetic pole matching relationship of the axial magnetic gear is determined by the Z-type axial guide magnet (4-2), the inner rotor (5), and the output low-speed rotor (6); among which, the number of Z-type axial guide magnets (4-2) Number of permanent magnet pole pairs in the inner rotor (5) and the number of pole pairs of the low-speed rotor (6) satisfy: So that the Z-shaped axial guide magnet (4-2) can effectively modulate the magnetic field of the inner rotor (5) and the magnetic field of the output low-speed rotor (6) to achieve stable axial magnetic gear transmission.

8. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 7, characterized in that, The output low-speed rotor (6) adopts a Halbach array permanent magnet structure. The permanent magnets in the output low-speed rotor (6) are arranged in the Halbach magnetization mode along the circumference to enhance the effective magnetic field on the side of the Z-shaped shaft guide magnet (4-2) and improve the magnetic field coupling capability and torque transmission capability of the axial magnetic gear.

9. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 8, characterized in that, The Z-shaped axial guide magnet (4-2) rotates synchronously with the outer rotor (4) and serves as the moving magnetic adjustment ring in the differential magnetic gear; the inner rotor (5), the Z-shaped axial guide magnet (4-2), and the output low-speed rotor (6) serve as the input rotor, magnetic adjustment rotor, and output rotor in the differential magnetic gear, respectively. The axial magnetic field is spatially modulated by the Z-shaped axial guide magnet (4-2) to achieve magnetic field coupling between the three moving parts; among them, the number of permanent magnet pole pairs of the inner rotor (5) , Internal rotor (5) speed Output low-speed rotor (6) number of pole pairs Output low-speed rotor (6) speed Number of Z-shaped axis guide magnets (4-2) Rotation speed of outer rotor (4) and Z-type shaft guide magnet (4-2) Satisfy the motion relationship of differential magnetic gears: This enables non-mechanical speed conversion and torque transmission between the inner rotor (5) and the output low-speed rotor (6).

10. The Z-type magnetic brushless dual-port motor composite integrated magnetic gear drive system according to claim 9, characterized in that, The operating frequency of the first electrical port corresponding to the external modulation winding (2) is determined by the combined magnetic field after modulation of the rotating magnetic field generated by the external rotor permanent magnet (4-1) and the rotating magnetic field generated by the internal rotor (5) permanent magnet through the radial magnetic guide part of the Z-shaped axial guide magnet block (4-2), satisfying the following: in, The electrical frequency of the external modulation winding (2); The operating frequency of the second electrical port corresponding to the inner modulation winding (3) is determined by the rotating magnetic field of the outer rotor permanent magnet (4-1) after being modulated by the spatial magnetic permeability of the stator (1) auxiliary teeth, and satisfies: in, is the electrical frequency of the internal modulation winding (3).

Images