Multi-port shaft-diameter mixed magnetic flux permanent magnet motor

Abstract

The invention provides a multi-port shaft-diameter mixed magnetic flux permanent magnet motor, and belongs to the technical field of motors. The permanent magnet motor comprises an axial stator, an axial rotor and an excitation stator which are coaxially arranged in sequence; the permanent magnet motor further comprises a radial rotor and a radial stator which are concentric with the excitation stator, and the radial rotor is located between the excitation stator and the radial stator. According to the permanent magnet motor, the radial stator and the axial stator share a single excitation source of the excitation stator, the two permanent magnets of neodymium iron boron and ferrite are embedded in the excitation stator, radial and axial mixed magnetic flux can be generated through structural combination of the excitation convex teeth and the L-shaped permanent magnets, and the utilization rate of the permanent magnets and the power density of the motor are effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a permanent magnet motor with multi-port shaft diameter mixed magnetic flux and high permanent magnet utilization. Background Art

[0002] In recent years, with the emergence of a large number of rare earth materials, permanent magnet motors have been widely used in electric vehicles, industrial and agricultural production, and daily life due to their advantages of high torque density, high power factor, and high efficiency. Compared with radial permanent magnet motors, axial permanent magnet motors have the characteristics of high power density and high efficiency of permanent magnet motors, as well as the advantages of compact structure and good heat dissipation conditions of axial motors. They are particularly suitable for new energy fields with large torque requirements. However, most traditional axial permanent magnet motors are coupled between axial magnetic fields, and in order to increase the torque of the motor, the rotor radius is often set larger, resulting in low radial space utilization.

[0003] The Chinese patent with patent announcement number CN105703583B proposes a multi-stator hybrid magnetic circuit permanent magnet synchronous motor and method. By adopting the structure of axial stator and radial stator, both the radial magnetic flux and axial magnetic flux generated by the permanent magnet are utilized, eliminating the end leakage magnetic effect. However, the motor embeds the permanent magnet in the rotor. When the motor runs at high speed, the permanent magnet is very likely to undergo irreversible demagnetization, which will have a great impact on the motor performance.

[0004] The Chinese patent publication document with patent publication number CN107579637A proposes an axial-radial flux permanent magnet motor. By adopting a composite magnetic field structure combining axial flux and radial flux, the permanent magnet utilization rate and motor power density are significantly improved. However, since the motor rotor connects radial and axial fluxes, it is necessary to ensure the consistency of radial and axial current control, which leads to certain difficulties in current control. Summary of the invention

[0005] The purpose of the present invention is to at least partially solve the above-mentioned technical problems, and aims to provide a multi-port axial-diameter mixed flux permanent magnet motor with high permanent magnet utilization, which can make full use of the internal space of the excitation stator so that the axial motor and the radial motor share an excitation stator, thereby improving the utilization rate of the permanent magnet and the power density of the motor. At the same time, the axial motor and the radial motor are completely decoupled, and can adapt to various working conditions through a flexible combination of the two.

[0006] In a first aspect of the present invention, a multi-port axial diameter mixed flux permanent magnet motor is provided, characterized in that the permanent magnet motor comprises an axial stator, an axial rotor and an excitation stator which are coaxially arranged in sequence;

[0007] The permanent magnet motor further comprises a radial rotor and a radial stator which are arranged concentrically with the excitation stator, and the radial rotor is 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 respectively composed of h and j magnetic salient pole iron blocks separated and arranged along the circumferential direction, and two adjacent magnetic salient pole iron blocks are connected by non-magnetic material, and h and j are positive integers greater than 3.

[0009] In some embodiments of the present invention, the outer pole arc width α of the axial rotor b1 and the inner polar arc width α b2 Satisfy: 360° / h>α b1 >α b2 ;

[0010] The outer pole arc width α of the radial rotor c1 and the inner polar arc width α c2 Satisfaction: α c1 <α c2 <360° / j.

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

[0012] A radial stator core, wherein the radial stator core is composed of a radial stator yoke and p radial stator armature teeth, wherein the radial stator armature teeth are located outside the circumference of the radial stator yoke and are arranged equidistantly along the circumference;

[0013] The radial winding is wound on the radial stator armature teeth.

[0014] In some embodiments of the present invention, the number n of the armature teeth of the axial stator, the number h of the magnetic salient pole iron blocks of the axial rotor, the number p of the armature teeth of the radial stator, and the number j of the magnetic salient pole iron blocks of the radial rotor satisfy: h=kn±1, k=1,2,…, j=ip±1, i=1,2,…

[0015] In some embodiments of the present invention, the current passed through the axial armature winding and the radial winding wound on the axial stator armature teeth and the radial stator armature teeth is a three-phase alternating current;

[0016] The current flowing into the axial excitation winding wound on the axial stator excitation teeth is a direct current;

[0017] When direct current is applied,

[0018] The DC current introduced is a positive DC current to increase the axial permanent magnet air gap flux.

[0019] The DC current supplied is a reverse DC current to weaken the axial permanent magnet air gap flux, and / or

[0020] Changing the DC current changes the magnetization intensity or the weakening magnetic intensity.

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

[0022] The excitation convex teeth are convexly arranged on the excitation core, and two adjacent excitation convex teeth are located on both sides of the protruding NdFeB permanent magnet and fasten the NdFeB permanent magnet.

[0023] In some embodiments of the present invention, the NdFeB permanent magnet is L-shaped, the long side of the L-shaped portion is embedded in the excitation core along the circumferential direction, and the short side of the L-shaped portion extends out of the excitation core;

[0024] The ferrite permanent magnet is in a straight line shape and is embedded in the excitation core along the circumference. Triangular notches are provided at both ends of the ferrite permanent magnet to prevent magnetic leakage at the ends of the permanent magnet.

[0025] In some embodiments of the present invention, the magnetization direction of the NdFeB permanent magnet is tangential magnetization, and the magnetization directions of two adjacent NdFeB permanent magnets are opposite;

[0026] The magnetization direction of the ferrite permanent magnet is radial magnetization, the magnetization direction is perpendicular to the long side of the ferrite permanent magnet, 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, the axial stator core is composed 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 along the circumference on the armature yoke, wherein n is a positive integer and is related to the number of axial motor phases and is an integer multiple of the number of axial motor phases. ;

[0029] The axial winding comprises an axial armature winding wound on the axial stator armature teeth and an axial excitation winding wound on the axial stator excitation teeth.

[0030] A multi-port shaft diameter hybrid flux permanent magnet motor with high permanent magnet utilization rate according to an 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 and adds a radial motor inside the excitation stator. The excitation stator provides an excitation magnetic field for both the axial motor and the radial motor, thereby improving the utilization rate of the permanent magnet and the power density of the motor.

[0032] 2. The degree of coupling between the axial and radial magnetic circuits of the permanent magnet motor of the present invention is relatively low, which makes it possible for the permanent magnet motor to operate in multiple modes; the radial motor is suitable for high-speed and low-torque situations, and the axial motor is suitable for low-speed and high-torque situations. 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 a concentrated winding, which has the advantages of shorter ends and smaller leakage reactance, thereby reducing the copper loss of the motor, reducing the cost of the motor and improving the efficiency of the motor.

[0034] 4. The rotor of the permanent magnet motor of the present invention is an excitation convex tooth structure, and is not provided with an excitation winding and a permanent magnet, which is beneficial to the heat dissipation of the rotor and avoids the centrifugal situation of the permanent magnet caused by the 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. The radial and axial stators share the same excitation stator, which improves the utilization rate of the permanent magnet and the power density of the motor. At the same time, the combination of the radial motor and the axial motor can be flexibly applied to various 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 the preferred embodiments in conjunction with the accompanying drawings, in which:

[0037] Figure 1 It is a schematic diagram of the exploded structure of a multi-port shaft diameter mixed flux permanent magnet motor with high permanent magnet utilization according to one embodiment of the present invention;

[0038] Figure 2 for Figure 1 Schematic diagram of the central axial stator;

[0039] Figure 3 for Figure 1 Schematic diagram of the axial winding;

[0040] Figure 4 for Figure 1 Schematic diagram of the mid-field stator;

[0041] Figure 5 for Figure 1 Schematic diagram of the mid-radial stator.

[0042] Figure 6 for Figure 1 Side view of the central axial rotor;

[0043] Figure 7 for Figure 1 Side view of the mid-radial rotor;

[0044] Figure 8 for Figure 1Schematic diagram of the magnetization direction of the permanent magnet of the mid-excitation stator, where the direction of the arrow is the magnetization direction;

[0045] Fig. 9 for Figure 1 A schematic diagram of the axial permanent magnet flux path of a multi-port axial diameter mixed flux permanent magnet motor shown;

[0046] Fig.10 for Figure 1 The schematic diagram of radial permanent magnet flux path A and radial permanent magnet flux path B of a multi-port axial-diameter mixed flux permanent magnet motor is shown.

[0047] Fig.11 This is a schematic diagram of the axial magnetization path of a multi-port axial diameter mixed flux permanent magnet motor with high permanent magnet utilization.

[0048] Among them: 1 is the axial stator, 2 is the axial winding, 3 is the axial rotor, 4 is the excitation stator, 5 is the radial rotor, and 6 is the radial stator. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further specifically described below by examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0050] See also Figure 1 , shows a multi-port shaft diameter mixed flux permanent magnet motor with high permanent magnet utilization according to an embodiment of the present invention.

[0051] Specifically, the permanent magnet motor includes five components, namely, an axial stator 1, a radial stator 6, an excitation stator 4, an axial rotor 3, and a radial rotor 5. The axial stator 1, the axial rotor 3, and the excitation stator 4 are coaxially arranged, and the axial rotor 3 is located between the axial stator 1 and the excitation stator 4; the excitation stator 4, the radial rotor 5, and the radial stator 6 are concentrically arranged, and the radial rotor 5 is located between the excitation stator 4 and the radial stator 6.

[0052] See also Figure 2 , the axial stator 1 mainly includes two parts: an axial stator core and an axial winding 2. The axial stator core is composed 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 is annular, the axial stator armature teeth 1-1 and the axial stator excitation teeth 1-2 are convexly arranged on 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 along the circumference on the armature yoke, where n is a positive integer, and is related to the number of axial motor phases, and is an integer multiple of the number of axial motor phases. .

[0053] See also Figure 3 The axial winding 2 includes two parts, namely, an axial armature winding 2-1 and an axial excitation winding 2-2, wherein the axial armature winding 2-1 is wound on the axial stator armature tooth 1-1, and the axial excitation winding 2-2 is wound on the axial stator excitation tooth 1-2.

[0054] Return to see Figure 1 The axial rotor 3 is composed of h salient pole conductive magnetic blocks separated and arranged along the circumference, and adjacent conductive magnetic blocks are connected by non-magnetic conductive materials, and h is a positive integer greater than 3.

[0055] See also Figure 4 The excitation stator 4 is composed of an excitation core 4-1, m ferrite permanent magnets 4-3, m NdFeB permanent magnets 4-2 and 2m excitation convex teeth 4-4, wherein the excitation core 4-1 is in a circular ring shape, and m is a positive integer.

[0056] The NdFeB permanent magnet 4-2 is L-shaped, wherein the long side of the L-shaped permanent magnet is embedded in the excitation core 4-1 along the circumferential direction, and the short side of the L-shaped permanent magnet extends out of the excitation core 4-1. The excitation convex teeth 4-4 are protruded on the excitation core 4-1, and two adjacent excitation convex teeth 4-4 are located on both sides of the extended NdFeB permanent magnet 4-2 and fasten it; the ferrite permanent magnet 4-3 is in a straight line shape and is embedded in the excitation core 4-1 along the circumference. Triangular notches are provided at both ends of the ferrite permanent magnet 4-3 to prevent magnetic leakage at the ends of the permanent magnet.

[0057] The magnetization direction of the NdFeB permanent magnet 4-2 is tangential magnetization, and the magnetization directions of two adjacent NdFeB permanent magnets 4-2 are opposite; the magnetization direction of the ferrite permanent magnet 4-3 is radial magnetization, and its magnetization direction is perpendicular to the I-shaped permanent magnet, and the magnetization directions of two adjacent ferrite permanent magnets 4-3 are opposite. Figure 8 shown.

[0058] The radial rotor 5 is composed of j magnetic conductive magnet blocks which are separated and arranged along the circumferential direction, and two adjacent magnetic conductive magnet blocks are connected by non-magnetic conductive materials. j is a positive integer greater than 3.

[0059] See also Figure 5 , the radial stator 6 mainly includes a radial stator core and a radial winding 6-1, wherein the radial stator core is composed of a radial stator yoke 6-3 and p radial stator armature teeth 6-2, wherein the radial stator armature teeth 6-2 are located outside the circumference of the radial stator yoke 6-3 and are arranged equidistantly along the circumference, and the radial winding 6-1 is wound on the radial stator armature teeth 6-2, wherein p is a positive integer and is related to the number of radial motor phases, and is an integer multiple of the number of radial motor phases. .

[0060] like Figure 6 , 7As shown, the outer pole arc width and the inner pole arc width of the axial rotor 3 satisfy 360° / h>α b1 >α b2 The outer pole arc width and inner pole arc width α of the radial rotor 5 c1 <α c2 <360° / j,.

[0061] The number n of axial stator armature teeth, the number h of axial rotor magnetic salient pole iron blocks, the number p of radial stator armature teeth, and the number j of radial rotor magnetic salient pole iron blocks satisfy: h=kn±1 (k=1, 2, ...), j=ip±1 (i=1, 2, ...). In this example, h=j=11, n=p=6.

[0062] In one embodiment, the current passed through the windings wound on the axial stator armature teeth 1-1 and the radial stator armature teeth 6-2 is a three-phase alternating current; the current passed through the windings wound on the axial stator excitation teeth 1-2 is a direct current, and the size of the axial air gap magnetic field can be changed by changing the size and polarity of the direct current.

[0063] The present invention follows the principle of flux switching motor. According to the principle of minimum magnetic resistance, the pole arc width on the lower surface of the radial rotor excitation cam 4-4 should be approximately equal to the pole arc width on the upper surface of the radial stator armature tooth 6-2, and the pole arc width on the upper side of the axial rotor excitation cam 4-4 should be approximately equal to the pole arc width on the upper side of the axial stator armature tooth 1-1.

[0064] See also Fig. 9 The multi-port axial diameter mixed flux permanent magnet motor includes a total of one axial permanent magnet flux path. When the NdFeB permanent magnet is magnetized in the forward direction, an axial permanent magnet flux path of the permanent magnet motor is as follows: starting from the NdFeB permanent magnet 4-2, it passes through the excitation cam 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 cam 4-4, the excitation core 4-1 and returns to the NdFeB permanent magnet 4-2; when the NdFeB permanent magnet is magnetized in the reverse direction, the motor axial permanent magnet flux path is opposite to it.

[0065] See also Fig.10The multi-port axial diameter hybrid flux permanent magnet motor includes two parallel radial flux paths, which are named radial permanent magnet flux path A and radial permanent magnet flux path B. According to the magnetization direction of the permanent magnets in the figure, the flux path of radial permanent magnet flux path A is as follows: starting from the NdFeB permanent magnet 4-2, it passes 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 teeth 6-2, the radial stator yoke 6-3, the radial stator armature teeth 6-2, the radial rotor 5, the excitation core 4-1, the ferrite permanent magnet 4-3, the excitation core 4-1 and then returns to the NdFeB permanent magnet 4-2. Iron boron permanent magnet 4-2; the magnetic flux path of the radial permanent magnet flux path B is as follows: starting from the NdFeB permanent magnet 4-2, it passes through the excitation core 4-1, the radial rotor 5, the radial stator armature teeth 6-2, the radial stator yoke 6-3, the radial stator armature teeth 6-2, the radial rotor 5, the excitation core 4-1 and then returns to the NdFeB permanent magnet 4-2; when the magnetization direction of the permanent magnet is opposite to the direction indicated in the figure, the magnetic flux path is also opposite to the above path.

[0066] See also Fig.11 The multi-port axial diameter mixed flux permanent magnet motor includes an axial magnetization path. When the axial excitation winding 2-2 is fed with a positive DC excitation current, the magnetization flux path is as follows: starting from the axial stator excitation tooth 2-2, it passes through the axial rotor 3, the excitation convex tooth 4-4, the excitation core 4-1, the excitation convex tooth 4-4, the axial rotor 3, the axial stator armature tooth 2-1, the axial stator yoke 1-3, and then returns to the axial stator excitation tooth 2-2. At this time, the axial armature flux path is the same as the magnetization path, the axial permanent magnet air gap flux of the motor increases, and the torque output capacity of the motor is enhanced; when the axial excitation winding 2-2 is fed with a reverse DC excitation current, the weak magnetic flux path is opposite to the above flux path, the axial permanent magnet air gap flux of the motor decreases, and the weak magnetic capacity of the motor is enhanced.

[0067] A multi-port shaft diameter hybrid flux permanent magnet motor with high permanent magnet utilization rate according to an 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 and adds a radial motor inside the excitation stator. The excitation stator provides an excitation magnetic field for both the axial motor and the radial motor, thereby improving the utilization rate of the permanent magnet and the power density of the motor.

[0069] 2. The degree of coupling between the axial and radial magnetic circuits of the permanent magnet motor of the present invention is relatively low, which makes it possible for the permanent magnet motor to operate in multiple modes; the radial motor is suitable for high-speed and low-torque situations, and the axial motor is suitable for low-speed and high-torque situations. 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 a concentrated winding, which has the advantages of shorter ends and smaller leakage reactance, thereby reducing the copper loss of the motor, reducing the cost of the motor and improving the efficiency of the motor.

[0071] 4. The rotor of the permanent magnet motor of the present invention is an excitation convex tooth structure, and is not provided with an excitation winding and a permanent magnet, which is beneficial to the heat dissipation of the rotor and avoids the centrifugal situation of the permanent magnet caused by the 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. The radial and axial stators share the same excitation stator, which improves the utilization rate of the permanent magnet and the power density of the motor. At the same time, the combination of the radial motor and the axial motor can be flexibly applied to various working conditions.

[0073] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-port shaft diameter mixed 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) which are coaxially arranged in sequence; The permanent magnet motor further comprises a radial rotor (5) and a radial stator (6) which are arranged concentrically with the excitation stator (4); the radial rotor (5) is located between the excitation stator (4) and the radial stator (6).

2. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 1, characterized in that: The axial rotor (3) and the radial rotor (5) are respectively composed of h and j magnetic salient pole iron blocks separated and arranged along the circumferential direction, and two adjacent magnetic salient pole iron blocks are connected by non-magnetic material, and h and j are positive integers greater than 3.

3. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 2, characterized in that: The outer pole arc width α of the axial rotor (3) b1 and the inner polar arc width α b2 Satisfy: 360° / h>α b1 >α b2 ; The outer pole arc width α of the radial rotor (5) c1 and the inner polar arc width α c2 Satisfaction: α c1 <α c2 <360° / j.

4. The multi-port shaft diameter mixed flux permanent magnet motor according to any one of claims 1 to 3, characterized in that: The radial stator (6) comprises: A radial stator core, the radial stator core being composed of a radial stator yoke (6-3) and p radial stator armature teeth (6-2), wherein p is a positive integer, and the radial stator armature teeth (6-2) are located outside the circumference of the radial stator yoke (6-3) and are arranged equidistantly along the circumference; A radial winding (6-1), wherein the radial winding (6-1) is wound on radial stator armature teeth (6-2).

5. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 4, characterized in that: The number n of armature teeth of the axial stator (3), the number h of magnetic salient pole iron blocks of the axial rotor (3), the number p of armature teeth of the radial stator (6), and the number j of magnetic salient pole iron blocks of the radial rotor (5) satisfy: h = kn ± 1, k = 1, 2, ..., j = ip ± 1, i = 1, 2, ...

6. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 4, characterized in that: The current flowing through the axial armature winding (2-1) and the radial winding (6-1) wound on the axial stator armature teeth (1-1) and the radial stator armature teeth (6-2) is a three-phase alternating current; The current flowing into the axial excitation winding (2-2) wound on the axial stator excitation teeth (1-2) is a direct current; When direct current is applied, The DC current introduced is a positive DC current to increase the axial permanent magnet air gap flux. The DC current supplied is a reverse DC current to weaken the axial permanent magnet air gap flux, and / or Changing the DC current changes the magnetization intensity or the weakening magnetic intensity.

7. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 4, characterized in that: The excitation stator (4) is composed of an excitation core (4-1), m ferrite permanent magnets (4-3), m neodymium iron boron permanent magnets (4-2) and 2m excitation convex teeth (4-4), wherein m is a positive integer; The excitation convex teeth (4-4) are convexly arranged on the excitation core (4-1), and two adjacent excitation convex teeth (4-4) are located on both sides of the protruding neodymium iron boron permanent magnet (4-2) and fasten the neodymium iron boron permanent magnet (4-2).

8. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 7, characterized in that: The NdFeB permanent magnet (4-2) is L-shaped, the long side of the L-shaped portion is embedded in the excitation core (4-1) along the circumferential direction, and the short side of the L-shaped portion extends out of the excitation core (4-1); The ferrite permanent magnet (4-3) is in the shape of a straight line and is embedded in the excitation core (4-1) along the circumference. Triangular notches are provided at both ends of the ferrite permanent magnet (4-3) to prevent magnetic flux leakage at the ends of the permanent magnet.

9. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 7, characterized in that: The magnetization direction of the NdFeB permanent magnets (4-2) is tangential magnetization, and the magnetization directions of two adjacent NdFeB permanent magnets (4-2) are opposite; The magnetization direction of the ferrite permanent magnet (4-3) is radial magnetization, the magnetization direction is perpendicular to the long side of the ferrite permanent magnet (4-3), and the magnetization directions of two adjacent ferrite permanent magnets (4-3) are opposite.

10. The multi-port shaft diameter mixed flux permanent magnet motor according to claim 4, characterized in that: The axial stator (1) comprises: An axial stator core, the axial stator core comprising 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 along the circumference of the armature yoke (1-3), wherein n is a positive integer; An axial winding (2), comprising an axial armature winding (2-1) wound on an axial stator armature tooth (1-1) and an axial excitation winding (2-2) wound on an axial stator excitation tooth (1-2).

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