Multi-port axial-radial hybrid flux permanent magnet machine

Abstract

An axial-radial hybrid flux permanent magnet motor, the motor comprises an axial stator 1, an axial rotor 3 and an excitation stator 4 disposed coaxially in sequence, and the permanent magnet motor fu

Description

MULTI-PORT AXIAL-RADIAL HYBRID FLUX PERMANENT MAGNET MOTOR TECHNICAL FIELD

[0001] The present invention belongs to the field of motor technology, and in particular, relates to a multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization. BACKGROUND

[0002] In recent years, with the emergence of a large number of rare earth materials, permanent magnet motors have been widely used in the fields of electric vehicles, industrial and agricultural production, and daily life by virtue of advantages of their high torque density, high power factor, and high efficiency. As compared with radial permanent magnet motors, axial permanent magnet motors have the characteristics of high power density and high efficiency of the permanent magnet motors, and also have the advantages of compact structures and good heat dissipation conditions of axial motors, to be especially suitable for new energy fields with large torque requirements. However, most of the conventional axial permanent magnet motors are coupled between axial magnetic fields, and in order to increase the torque of a motor, the radius of its rotor is often set to be larger, resulting in a lower utilization of radial space.

[0003] Chinese Patent Publication No. CN105703583B proposes a multi-stator hybrid magnetic circuit permanent magnet synchronous motor and method, which, due to adopting a structural form of an axial stator and a radial stator, makes radial and axial fluxes generated by the permanent magnets utilized and eliminates the end magnetic leakage effect. However, the motor has the permanent magnets embedded in a rotor, and when the motor is operated at a high speed, the permanent magnets are very prone to irreversible demagnetization, which has a great impact on the performance of the motor.

[0004] Chinese Patent Publication No. CN107579637A proposes an axial-radial flux permanent magnet motor, which, due to adopting a composite magnetic field structure that combines axial and radial fluxes, results in a significant improvement in the utilization of the permanent magnets and the power density of the motor. However, since the rotor of the motor communicates with the radial and axial fluxes, it is necessary to ensure consistency in the control of radial and axial currents, which results in a certain degree of difficulty in current control. SUMMARY

[0005] An object of the present invention is to solve, at least partially, the above technical problems, and aims to provide a multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization, which can make full use of the internal space of the excitation stator, so that an axial motor shares one excitation stator with a radial motor, and improves the utilization of the permanent magnets and the power density of the motor, and meantime, the axial motor is completely decoupled with the radial motor, and can be adapted to a variety of working conditions through a flexible combination of the two.

[0006] In a first aspect of the present invention, there is provided a multi-port axial-radial hybrid flux permanent magnet motor, characterized in that, the permanent magnet motor comprises an axial stator, an axial rotor, and an excitation stator disposed coaxially in sequence; and

[0007] the permanent magnet motor further comprises a radial rotor and a radial stator disposed concentrically with the excitation stator, the radial rotor being located between the excitation stator and the radial stator.

[0008] In some embodiments of the present invention, the axial rotor and the radial rotor are comprised of h and j magnetically conductive salient-pole iron blocks separately disposed along a circumferential direction, two adjacent magnetically conductive salient-pole iron blocks are connected using a non-magnetically conductive material, and h and j are positive integers greater than 3.

[0009] In some embodiments of the present invention, an outer pole-arc width abi and an inner pole-arc width ab2 of the axial rotor satisfy: 360° / h >abi> ab2; and

[0010] an outer pole-arc width aci and an inner pole-arc width aC2 of the radial rotor satisfy: aci< aC2< 360° / j.

[0011] In some embodiments of the present invention, the radial stator comprises:

[0012] a radial stator core comprised of a radial stator yoke and p radial stator armature teeth, the radial stator armature teeth being located on an outer side of the circumference of the radial stator yoke and equidistantly arranged along the circumference; and

[0013] radial windings wound around the radial stator armature teeth.

[0014] In some embodiments of the present invention, the number of armature teeth of the axial stator, n, the number of the magnetically conductive salient-pole iron blocks of the axial rotor, h, the number of armature teeth of the radial stator, p, and the number of the magnetically conductive salient-pole iron blocks of the radial rotor, j, satisfy: h=kn±l, k=l, 2, ..., and j=ip±l, i=l, 2, ....

[0015] In some embodiments of the present invention, currents passing through axial armature windings wound around the axial stator armature teeth and the radial windings wound around the radial stator armature teeth are three-phase alternating currents; and

[0016] a current passing through an axial excitation winding wound around axial stator excitation teeth is a direct current,

[0017] wherein, when the direct current is applied,

[0018] the direct current applied is a forward direct current to increase an axial permanent magnet air-gap flux,

[0019] the direct current applied is a backward direct current to weaken the axial permanent magnet air-gap flux, and / or

[0020] the direct current is varied to change a magnetizing intensity or demagnetizing intensity.

[0021] In some embodiments of the present invention, the excitation stator is comprised of an excitation core, m ferrite permanent magnets, m neodymium-iron-boron permanent magnets and 2m excitation salient teeth, where m is a positive integer;

[0022] the excitation salient teeth are convexly disposed on the excitation core, and two adjacent excitation salient teeth are located on both sides of the protruding neodymium-iron-boron permanent magnets and fasten the neodymium-iron-boron permanent magnets.

[0023] In some embodiments of the present invention, each of the neodymium-iron-boron permanent magnets has a L-shape, long side portions of the L-shapes are embedded in the excitation core along the circumferential direction, and short side portions of the L-shapes protrude from the excitation core;

[0024] each of the ferrite permanent magnets has a straight shape and the ferrite permanent magnets are embedded in the excitation core along the circumference, and triangular notches are disposed at both ends of the ferrite permanent magnets to avoid magnetic leakage at ends of the permanent magnets.

[0025] In some embodiments of the present invention, magnetization directions of the neodymium-iron-boron permanent magnets are tangential directions and the magnetization directions of two adjacent neodymium-iron-boron permanent magnets are opposite;

[0026] magnetization directions of the ferrite permanent magnets are radial, where the magnetization directions are perpendicular to long sides of the ferrite permanent magnets, and the magnetization directions of two adjacent ferrite permanent magnets are opposite.

[0027] In some embodiments of the present invention, the axial stator comprises:

[0028] an axial stator core comprised of an axial stator yoke, n axial stator armature teeth, and n axial stator excitation teeth, wherein the axial stator armature teeth and the axial stator excitation teeth are alternately arranged on the armature yoke along the circumference, where n is a positive integer, is related to the number of phases of the axial motor and is an integer multiple of the number of phases of the axial motor; and

[0029] an axial winding comprising axial armature windings wound around the axial stator armature teeth and an axial excitation winding wound around the axial stator excitation teeth.

[0030] The multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization according to the embodiment of the present invention has at least one of the following advantages.

[0031] 1. The permanent magnet motor of the present invention makes full use of the radial space of the excitation stator by incorporating a radial motor within the excitation stator, and the excitation stator provides an excitation magnetic field both for the axial motor and for the radial motor, which improves the utilization of the permanent magnets and the power density of the motor.

[0032] 2. The permanent magnet motor of the present invention has a low degree of magnetic circuit coupling of the axial and radial motors, which provides a possibility of multi-mode operations of the permanent magnet motor. That is, the radial motor is suitable for a high-speed and low-torque scenario, but the axial motor is suitable for a low-speed and large-torque scenario, and the combination of the radial motor and the axial motor can be flexibly applied to a variety of working conditions.

[0033] 3. The permanent magnet motor of the present invention adopts centralized windings, which have the advantages of shorter ends and smaller leakage reactance, reduces the copper loss of the motor, and improves the efficiency of the motor while reducing the cost of the motor.

[0034] 4. The rotor in the permanent magnet motor of the present invention has a structure of the excitation salient teeth, without the excitation winding and permanent magnets, which is conducive to heat dissipation of the rotor as well as avoiding a centrifugal situation of the permanent magnets caused by high-speed rotation of the rotor.

[0035] 5. The permanent magnet motor of the present invention makes full use of the internal space of the excitation stator, and the radial and axial stators share the same excitation stator for excitation, which improves the utilization of the permanent magnets and the power density of the motor, and meantime, the combination of the radial motor and the axial motor can be flexibly applied to a variety of working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] These and / or other aspects and advantages of the present invention will become apparent and readily understood from the following description of preferred embodiments in conjunction with the accompanying drawings, in which:

[0037] FIG. lisa schematic diagram of a disassembled structure of a multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization according to an embodiment of the present invention;

[0038] FIG. 2 is a schematic diagram of the axial stator in FIG. 1;

[0039] FIG. 3 is a schematic diagram of the axial windings in FIG. 1;

[0040] FIG. 4 is a schematic diagram of the excitation stator in FIG. 1;

[0041] FIG. 5 is a schematic diagram of the radial stator in FIG. 1.

[0042] FIG. 6 is a side view of the axial rotor in FIG. 1;

[0043] FIG. 7 is a side view of the radial rotor in FIG. 1;

[0044] FIG. 8 is a schematic diagram of magnetization directions of the permanent magnets of the excitation stator in FIG. 1, directions of arrows in the figure being the magnetization directions;

[0045] FIG. 9 is a schematic diagram of an axial permanent magnet flux path of the multi-port axial-radial hybrid flux permanent magnet motor shown in FIG. 1;

[0046] FIG. 10 is a schematic diagram of a radial permanent magnet flux path A and a radial permanent magnet flux path B of the multi-port axial-radial hybrid flux permanent magnet motor shown in FIG. 1; and

[0047] FIG. 11 is a schematic diagram of an axial magnetizing path of a multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization.

[0048] In the drawings, 1 is the axial stator, 2 is the axial windings, 3 is the axial rotor, 4 is the excitation stator, 5 is the radial rotor, and 6 is the radial stator. DETAILED DESCRIPTION

[0049] Below, the technical solution of the present invention is further explained specifically by the embodiments and in conjunction with the accompanying drawings. In the specification, the same or like reference numerals indicate the same or like components. The following description of the embodiments of the present invention with reference to the drawings is intended to provide an explanation of general inventive concepts of the present invention, and should not be construed as a limitation of the present invention.

[0050] Referring to FIG. 1, a multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization according to an embodiment of the present invention is shown.

[0051] Specifically, the permanent magnet motor comprises five components such as an axial stator 1, a radial stator 6, an excitation stator 4, an axial rotor 3, a radial rotor 5, and the like. The axial stator 1, the axial rotor 3, and the excitation stator 4 are disposed coaxially, and the axial rotor 3 is located in the middle of the axial stator 1 and the excitation stator 4. The excitation stator 4, the radial rotor 5, and the radial stator 6 are disposed concentrically and the radial rotor 5 is located between the excitation stator 4 and the radial stator 6.

[0052] Referring to Fig. 2, the axial stator 1 mainly comprises two parts, i.e., an axial stator core and axial windings 2. The axial stator core is comprised of an axial stator yoke 1-3, n axial stator armature teeth 1-1, and n axial stator excitation teeth 1-2. The axial armature yoke 1-3 has a ring shape, the axial stator armature teeth 1-1 and the axial stator excitation teeth 1-2 are protruded from the axial stator yoke 1-3, and the axial stator armature teeth 1-1 and the axial stator excitation teeth 1-2 are alternately arranged on the armature yoke along the circumference, where n is a positive integer, is related to the number of phases of the axial motor and is an integer multiple of the number of phases of the axial motor.

[0053] Referring to FIG. 3, the axial windings 2 comprises two parts, i.e., axial armature windings 2-1 and an axial excitation winding 2-2, wherein the axial armature windings 2-1 are wound around the axial stator armature teeth 1-1 and the axial excitation winding 2-2 are wound around the axial stator excitation teeth 1-2.

[0054] Referring back to Fig. 1, the axial rotor 3 is comprised of h magnetically conductive salient-pole iron blocks separately disposed along a circumferential direction, adjacent magnetizing iron blocks are connected using a non-magnetically conductive material, and h is a positive integer greater than 3.

[0055] Referring to FIG. 4, the excitation stator 4 is comprised of an excitation core 4-1, m ferrite permanent magnets 4-3, m neodymium-iron-boron permanent magnets 4-2, and 2m excitation salient teeth 4-4, wherein the excitation core 4-1 has a ring shape, and m is a positive integer.

[0056] Each of the neodymium-iron-boron permanent magnets 4-2 has a L-shape, wherein long sides of the L-shaped permanent magnets are embedded in the excitation core 4-1 along the circumferential direction, and short sides of the L-shaped permanent magnets protrude from the excitation core 4-1. The excitation salient teeth 4-4 are protruded from the excitation core 4-1, and two adjacent excitation salient teeth 4-4 are located on both sides of the protruding neodymium-iron-boron permanent magnets 4-2 and fasten them. Each of the ferrite permanent magnets 4-3 has a straight shape and the ferrite permanent magnets are embedded in the excitation core 4-1 along the circumference. Triangular notches are disposed at both ends of the ferrite permanent magnets 4-3 to avoid magnetic leakage at ends of the permanent magnets.

[0057] Magnetization directions of the neodymium-iron-boron permanent magnets 4-2 are tangential directions and the magnetization directions of two adjacent neodymium-iron-boron permanent magnets 4-2 are opposite. Magnetization directions of the ferrite permanent magnets 4-3 are radial directions, where the magnetization directions are perpendicular to the permanent magnets having the straight shape, and the magnetization directions of two adjacent ferrite permanent magnets 4-3 are opposite, and the magnetizing directions are as shown in FIG. 8.

[0058] The radial rotor 5 is comprised of j magnetically conductive iron blocks disposed separately along the circumferential direction, and two adjacent magnet-conducting iron blocks are connected using a non-magnetically conductive material, where j is a positive integer greater than 3.

[0059] Referring to FIG. 5, the radial stator 6 mainly comprises a radial stator core and radial windings 6-1, wherein the radial stator core is comprised of a radial stator yoke 6-3 and p radial stator armature teeth 6-2, the radial stator armature teeth 6-2 are located on an outer side of the circumference of the radial stator yoke 6-3 and equidistantly arranged along the circumference. The radial windings 6-1 are wound around the radial stator armature teeth 6-2, where p is a positive integer, is related to the number of phases of the radial motor and is an integer multiple of the number of phases of the radial motor.

[0060] As shown in FIGS. 6 and 7, an outer pole-arc width and an inner pole-arc width of the axial rotor 3 satisfy 360° / h>abi>ab2, and an outer pole-arc width and an inner pole-arc width of the radial rotor 5 satisfy aci<aC2<360° / j.

[0061] The number of armature teeth of the axial stator, n, the number of the magnetically conductive salient-pole iron blocks of the axial rotor, h, the number of armature teeth of the radial stator, p, and the number of the magnetically conductive salient-pole iron blocks of the radial rotor, j, satisfy: h=kn±l (k=l, 2, ...) and j=ip±l (i=l, 2, ...). In this example, h=j=ll, and n=p=6.

[0062] In one embodiment, currents passing through the windings wound around the axial stator armature teeth 1-1 and the radial stator armature teeth 6-2 are three-phase alternating currents, and a current passing through the windings wound around the axial stator excitation teeth 1-2 is a direct current, and the magnitude of the axial air-gap magnetic field can be varied by changing the magnitude and polarity of the direct current.

[0063] The present invention follows the principle of a flux-switching motor, which, according to the principle of minimum reluctance, should satisfy that the pole-arc width on a lower surface of the excitation salient teeth 4-4 of the radial rotor is approximately equal to the pole-arc width on an upper surface of the radial stator armature teeth 6-2, and that the pole-arc width on an upper side of the excitation salient teeth 4-4 of the axial rotor is approximately equal to the pole-arc width on an upper side of the axial stator armature teeth 1-1.

[0064] Referring to FIG. 9, the described multi-port axial-radial hybrid flux permanent magnet motor is described as comprising a total of one axial permanent magnet flux path. When the neodymium-iron-boron permanent magnets are magnetized in the forward direction, the one axial permanent magnet flux path of the permanent magnet motor is as follows: starting from the neodymium-iron-boron permanent magnet 4-2, passing through the excitation salient tooth 4-4, the axial rotor 3, the axial stator armature tooth 1-1, the axial stator yoke 1-3, the axial stator armature tooth 1-1, the axial rotor 3, the excitation salient tooth 4-4, the excitation core 4-1 in sequence and then returning to the neodymium-iron-boron permanent magnet 4-2. When the neodymium-iron-boron permanent magnets are magnetized in the backward direction, the axial permanent magnet flux path of the motor is reversed.

[0065] Referring to FIG. 10, the described multi-port axial-radial hybrid flux permanent magnet motor comprises a total of two parallel radial flux paths named a radial permanent magnet flux path A, and a radial permanent magnet flux path B, respectively. According to the magnetizing direction of the permanent magnets in the figure, the flux path of the radial permanent magnet flux path A is as follows: starting from the neodymium-iron-boron permanent magnet 4-2, passing through the excitation core 4-1, the ferrite permanent magnet 4-3, the excitation core 4-1, the radial rotor 5, the radial stator armature tooth 6-2, the radial stator yoke 6-3, the radial stator armature tooth 6-2, the radial rotor 5, the excitation core 4-1, the ferrite permanent magnet 4-3, the excitation core 4-1 in sequence and then returning to the neodymium-iron-boron permanent magnet 4-2, while the flux path of the radial permanent magnet flux path B is as follows: starting from the neodymium-iron-boron permanent magnet 4-2, passing through the excitation core 4-1, the radial rotor 5, the radial stator armature tooth 6-2, the radial stator yoke 6-3, the radial stator armature tooth 6-2, the radial rotor 5, the excitation core 4-1 and then returning to the neodymium-iron-boron permanent magnet 4-2. When the permanent magnets are magnetized in a direction opposite to the direction indicated in the figure, the flux path is also opposite to the above path.

[0066] Referring to FIG. 11, the described multi-port axial-radial hybrid flux permanent magnet motor comprises an axial magnetization path. When a forward direct current excitation current passes through the axial excitation winding 2-2, a magnetizing flux path is as follows: starting from the axial stator excitation tooth 2-2, passing through the axial rotor 3, the excitation salient tooth 4-4, the excitation core 4-1, the excitation salient tooth 4-4, the axial rotor 3, the axial stator armature tooth 2-1, the axial stator yoke 1-3 in sequence and then returning to the axial stator excitation tooth 2-2, and at this time the axial armature flux path is the same as the magnetizing path, the axial permanent magnet air-gap flux of the motor increases, and the torque output capability of the motor is enhanced. When a backward direct current excitation current passes through the axial excitation winding 2-2, a demagnetizing flux path is opposite to the above flux path, the axial permanent magnet air-gap flux of the motor decreases, and the demagnetizing capability of the motor is enhanced.

[0067] The multi-port axial-radial hybrid flux permanent magnet motor with high permanent magnet utilization according to the embodiment of the present invention has at least one of the following advantages.

[0068] 1. The permanent magnet motor of the present invention makes full use of the radial space of the excitation stator by incorporating a radial motor within the excitation stator, and the excitation stator provides an excitation magnetic field both for the axial motor and for the radial motor, which improves the utilization of the permanent magnets and the power density of the motor.

[0069] 2 The permanent magnet motor of the present invention has a low degree of magnetic circuit coupling of the axial and radial motors, which provides a possibility of multi-mode operations of the permanent magnet motor. That is, the radial motor is suitable for a high-speed and low-torque scenario, but the axial motor is suitable for a low-speed and large-torque scenario, and the combination of the radial motor and the axial motor can be flexibly applied to a variety of working conditions.

[0070] 3. The permanent magnet motor of the present invention adopts centralized windings, which have the advantages of shorter ends and smaller leakage reactance, reduces the copper loss of the motor, and improves the efficiency of the motor while reducing the cost of the motor.

[0071] 4. The rotor in the permanent magnet motor of the present invention has a structure of the excitation salient teeth, without the excitation winding and permanent magnets, which is conducive to heat dissipation of the rotor as well as avoiding a centrifugal situation of the permanent magnets caused by high-speed rotation of the rotor.

[0072] 5. The permanent magnet motor of the present invention makes full use of the internal space of the excitation stator, and the radial and axial stators share the same excitation stator for excitation, which improves the utilization of the permanent magnets and the power density of the motor, and meantime, the combination of the radial motor and the axial motor can be flexibly applied to a variety of working conditions.

[0073] While some embodiments of present general inventive concepts have been shown and illustrated, it will be understood by one of ordinary skill in the art that changes may be made to these embodiments without departing from the principles and spirit of present general inventive concepts, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A multi-port axial-radial hybrid flux permanent magnet motor, characterized in that, the permanent magnet motor comprises an axial stator (1), an axial rotor (3) and an excitation stator (4) disposed coaxially in sequence, andthe permanent magnet motor further comprises a radial rotor (5) and a radial stator (6) disposed concentrically with the excitation stator (4), the radial rotor (5) being located between the excitation stator (4) and the radial stator (6).

2. The multi-port axial-radial hybrid flux permanent magnet motor of claim 1, characterized in that,the axial rotor (3) and the radial rotor (5) are comprised of h and j magnetically conductive salient-pole iron blocks separately disposed along a circumferential direction, respectively, two adjacent magnetically conductive salient-pole iron blocks are connected using a non-magnetically conductive material, and h and j are positive integers greater than 3.

3. The multi-port axial-radial hybrid flux permanent magnet motor of claim 2, characterized in that,an outer pole-arc width abi and an inner pole-arc width ab2of the axial rotor (3) satisfy: 3607h>abi>ab2; andan outer pole-arc width aci and an inner pole-arc width aC2 of the radial rotor (5) satisfy: Oci<ac2<3607j.

4. The multi-port axial-radial hybrid flux permanent magnet motor of any one of claims 1-3, characterized in that,the radial stator (6) comprises:a radial stator core comprised of a radial stator yoke (6-3) and p radial stator armature teeth (6-2), where p is a positive integer, and the radial stator armature teeth (6-2) are located on an outer side of the circumference of the radial stator yoke (6-3) and equidistantly arranged along the circumference; andradial windings (6-1) wound around the radial stator armature teeth (6-2).

5. The multi-port axial-radial hybrid flux permanent magnet motor of claim 4, characterized in that,the number of armature teeth of the axial stator (3), n, the number of the magnetically conductive salient-pole iron blocks of the axial rotor (3), h, the number of armature teeth of the radial stator (6), p, and the number of the magnetically conductive salient-pole iron blocks of the radial rotor (5), j, satisfy: h=kn±l, k=l, 2, ..., andj=ip±l, i=l, 2, ....

6. The multi-port axial-radial hybrid flux permanent magnet motor of claim 4, characterized in that,currents passing through axial armature windings (2-1) wound around axial stator armature teeth (1-1) and the radial windings (6-1) wound around the radial stator armature teeth (6-2) are three-phase alternating currents; anda current passing through an axial excitation winding (2-2) wound around axial stator excitation teeth (1-2) is a direct current,wherein, when the direct current is applied,the direct current applied is a forward direct current to increase an axial permanent magnet air-gap flux,the direct current applied is a backward direct current to weaken the axial permanent magnet air-gap flux, and / orthe direct current is varied to change a magnetizing intensity or demagnetizing intensity.

7. The multi-port axial-radial hybrid flux permanent magnet motor of claim 4, characterized in that,the excitation stator (4) is comprised of an excitation core (4-1), m ferrite permanent magnets (4-3), m neodymium-iron-boron permanent magnets (4-2) and 2m excitation salient teeth (4-4), where m is a positive integer;the excitation salient teeth (4-4) are protruded from the excitation core (4-1), and two adjacent excitation salient teeth (4-4) are located on both sides of the protrudingneodymium-iron-boron permanent magnets (4-2) and fasten the neodymium-iron-boron permanent magnets (4-2).

8. The multi-port axial-radial hybrid flux permanent magnet motor of claim 7, characterized in that,each of the neodymium-iron-boron permanent magnets (4-2) has a L-shape, long side portions of the L-shapes are embedded in the excitation core (4-1) along the circumferential direction, and short side portions of the L-shapes protrude from the excitation core (4-1);each of the ferrite permanent magnets (4-3) has a straight shape and the ferrite permanent magnets are embedded in the excitation core (4-1) along the circumference, and triangular notches are disposed at both ends of the ferrite permanent magnets (4-3) to avoid magnetic leakage at both ends of the permanent magnets.

9. The multi-port axial-radial hybrid flux permanent magnet motor of claim 7, characterized in that,magnetization directions of the neodymium-iron-boron permanent magnets (4-2) are tangential direction and the magnetization directions of two adjacent neodymium-iron-boron permanent magnets (4-2) are opposite;magnetization directions of the ferrite permanent magnets (4-3) are radial direction, where the magnetization directions are perpendicular to long sides of the ferrite permanent magnets (4-3), and the magnetization directions of two adjacent ferrite permanent magnets (4-3) are opposite.

10. The multi-port axial-radial hybrid flux permanent magnet motor of claim 4, characterized in that,the axial stator (1) comprises:an axial stator core comprised of an axial stator yoke (1-3), n axial stator armature teeth (1-1), and n axial stator excitation teeth (1-2), wherein the axial stator armature teeth (1-1) and the axial stator excitation teeth (1-2) are alternately arranged on the armature yoke (1-3) along the circumference, where n is a positive integer; andan axial winding (2) comprising axial armature windings (2-1) wound around the axial stator armature teeth (1-1) and an axial excitation winding (2-2) wound around the axial stator excitation teeth (1-2).T +44(0)30 0300 2000A

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