Halbach rotor applied to high-speed motor

Abstract

A Halbach rotor applied to a high-speed motor comprises a transmission shaft, a shaft key, an iron core, a magnetic ring and an outer ring which are sequentially arranged from outside to inside, the magnetic ring is a circular ring body formed by sequentially splicing first magnetic steel, second magnetic steel, third magnetic steel and fourth magnetic steel clockwise, and the first magnetic steel, the second magnetic steel, the third magnetic steel and the fourth magnetic steel are the same in size. The arrangement mode of the magnetic field of the magnetic ring is a Halbach array. According to the Halbach rotor applied to the high-speed motor, through the Halbach array of the magnetic ring, the outer circular surface of the magnetic ring is a high surface magnetic surface, the magnetic density and power of a working surface are increased, the magnetic density of a non-working surface is reduced, the influence of the non-working surface on the working surface and other magnetic sensitive parts can be effectively avoided, and the service life of the Halbach rotor is prolonged. The utilization rate of magnetic materials is increased, the use of the magnetic materials is reduced, the manufacturing cost of the product is saved, meanwhile, the use amount of rare earth is reduced, and the product is more environment-friendly.

Description

Technical Field

[0001] The utility model relates to a Halbach rotor applied to a high-speed motor. Background Art

[0002] A motor is a device that can convert electrical energy into mechanical energy. With the rapid development of science and technology in recent years, the high-speed motor industry has been driven to develop. Currently, most high-speed motors use permanent magnet high-speed motors. Permanent magnet rotors are rotors used in permanent magnet high-speed motors. The magnetic field arrangement of existing permanent magnet rotors is a conventional arrangement of adjacent opposite-pole magnets attracting each other or adjacent same-pole magnets strengthening each other. The process of this arrangement is simple and mature, but the surface magnetic strength of the magnet is low and the utilization rate of the magnet is low, resulting in a large amount of raw materials and high product manufacturing costs. Utility Model Content

[0003] The utility model provides a Halbach rotor applied to a high-speed motor.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A Halbach rotor used in a high-speed motor comprises a transmission shaft, a shaft key, an iron core, a magnetic ring and an outer ring which are arranged in sequence from outside to inside. The magnetic ring is a circular ring body formed by splicing a first magnetic steel, a second magnetic steel, a third magnetic steel and a fourth magnetic steel in a clockwise manner. The first magnetic steel, the second magnetic steel, the third magnetic steel and the fourth magnetic steel are of the same size. The magnetization direction of the first magnetic steel is outward along the radius of the circular ring, the magnetization direction of the third magnetic steel is inward along the radius of the circular ring, the magnetization direction of the second magnetic steel is along the tangential direction of the magnetic ring and toward the first magnetic steel, the magnetization direction of the fourth magnetic steel is along the tangential direction of the magnetic ring and away from the third magnetic steel, the magnetic field arrangement mode of the magnetic ring is a Halbach array, and the outer circular surface of the magnetic ring is a high surface magnetic surface.

[0006] Preferably, the transmission shaft is a cylinder, one end of the transmission shaft is provided with a groove, and the middle of the transmission shaft is provided with two keyways opposite to each other.

[0007] Preferably, the shaft key is a square block with smooth semicircular ends, and the shaft key is installed in the keyway of the transmission shaft.

[0008] Preferably, the iron core is a cylinder, and the axis of the iron core is provided with an axial hole that cooperates with the transmission shaft and the shaft key, and the shaft key cooperates with the axial hole to fix the iron core on the transmission shaft.

[0009] Preferably, core holes are arranged at intervals around the shaft hole.

[0010] Preferably, the outer ring wraps the magnetic ring as a whole, and the material of the outer ring is carbon fiber.

[0011] The utility model is applied to the Halbach rotor on the high-speed motor. Through the Halbach array of the magnetic ring, the outer cylindrical surface of the magnetic ring is a high surface magnetic surface, the magnetic density and power of the working surface are increased, and the magnetic density of the non-working surface is reduced, and the influence of the non-working surface on the working surface and other magnetically sensitive components can be effectively avoided, the utilization rate of the magnetic material is increased and the use of the magnetic material is reduced, the manufacturing cost of the product is saved, and the use of rare earth is reduced, which is more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a three-dimensional schematic diagram of a Halbach rotor used in a high-speed motor.

[0013] Figure 2 The utility model is an exploded schematic diagram of a Halbach rotor used in a high-speed motor.

[0014] Figure 3 The utility model is a schematic diagram of the magnetic steel of a Halbach rotor used in a high-speed motor. DETAILED DESCRIPTION

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] like Figures 1 to 3 As shown, a Halbach rotor used in a high-speed motor includes a transmission shaft 1, a shaft key 2, an iron core 3, a magnetic ring 4 and an outer ring 5 which are arranged in sequence from the outside to the inside.

[0017] The transmission shaft 1 is a cylinder, and one end of the transmission shaft 1 is provided with a groove 11 for connecting the load end. Two keyways 12 are provided opposite to each other on the middle side wall of the transmission shaft 1, and the shaft key 2 is a square block with smooth semicircular ends, and the shaft key 2 is installed in the keyway 12 of the transmission shaft 1.

[0018] The iron core 3 is a cylinder, and the axis of the iron core 3 is provided with an axial hole 31 that cooperates with the transmission shaft 1 and the shaft key 2. The shaft key 2 cooperates with the axial hole 31 to fix the iron core 3 on the transmission shaft 1, and can drive the iron core 3 to rotate synchronously when the transmission shaft 1 rotates. The iron core holes 32 are arranged at intervals around the axial hole 31. The setting of the iron core holes 32 can reduce the weight of the iron core 3 to improve the response speed of the rotor, and reduce the use of raw materials, while effectively preventing the magnetic conduction and leakage of the transmission shaft 1.

[0019] The magnetic ring 4 is a circular ring body formed by clockwise splicing of a first magnetic steel 41, a second magnetic steel 42, a third magnetic steel 43 and a fourth magnetic steel 44. The first magnetic steel 41, the second magnetic steel 42, the third magnetic steel 43 and the fourth magnetic steel 44 are of the same size. The magnetizing direction of the first magnetic steel 41 is outward along the radius of the circular ring, the magnetizing direction of the third magnetic steel 43 is inward along the radius of the circular ring, the magnetizing direction of the second magnetic steel 42 is along the tangential direction of the magnetic ring 4 and toward the first magnetic steel 41, the magnetizing direction of the fourth magnetic steel 44 is along the tangential direction of the magnetic ring 4 and away from the third magnetic steel 43, the magnetic field arrangement of the magnetic ring 4 is a Halbach array, the outer cylindrical surface of the magnetic ring 4 is a high surface magnetic surface, which increases the torque of the rotor, the magnetic density and power of the working surface, and reduces the magnetic density of the non-working surface, which can effectively avoid the influence of the non-working surface on the working surface and other magnetically sensitive components, increase the utilization rate of magnetic materials and reduce the use of magnetic materials, save the manufacturing cost of the product, and at the same time reduce the use of rare earth, which is more environmentally friendly.

[0020] The outer ring 5 wraps the magnetic ring 4 as a whole. The material of the outer ring 5 is carbon fiber with light weight, high strength and high rigidity, which can reduce the weight and inertia of the rotor.

[0021] The utility model is applied to the Halbach rotor on the high-speed motor. Through the Halbach array of the magnetic ring 4, the outer cylindrical surface of the magnetic ring 4 is a high surface magnetic surface, the magnetic density and power of the working surface are increased, and the magnetic density of the non-working surface is reduced, which can effectively avoid the influence of the non-working surface on the working surface and other magnetically sensitive components, increase the utilization rate of magnetic materials and reduce the use of magnetic materials, save the manufacturing cost of the product, and reduce the use of rare earth, which is more environmentally friendly.

[0022] Finally, it should be noted that the above embodiments only illustrate the technical solutions of the present invention, rather than limiting it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A Halbach rotor used in a high-speed motor, comprising a transmission shaft (1), a shaft key (2), an iron core (3), a magnetic ring (4) and an outer ring (5) arranged in sequence from outside to inside, characterized in that: The magnetic ring (4) is a circular ring body formed by splicing a first magnetic steel (41), a second magnetic steel (42), a third magnetic steel (43) and a fourth magnetic steel (44) in a clockwise manner. The first magnetic steel (41), the second magnetic steel (42), the third magnetic steel (43) and the fourth magnetic steel (44) are of the same size. The magnetization direction of the first magnetic steel (41) is outward along the radius of the circular ring, the magnetization direction of the third magnetic steel (43) is inward along the radius of the circular ring, the magnetization direction of the second magnetic steel (42) is along the tangential direction of the magnetic ring (4) and faces the first magnetic steel (41), the magnetization direction of the fourth magnetic steel (44) is along the tangential direction of the magnetic ring (4) and faces away from the third magnetic steel (43), the magnetic field arrangement of the magnetic ring (4) is a Halbach array, and the outer circumferential surface of the magnetic ring (4) is a high surface magnetic surface.

2. The Halbach rotor used in a high-speed motor according to claim 1, characterized in that: The transmission shaft (1) is a cylinder, one end of the transmission shaft (1) is provided with a groove (11), and the middle of the transmission shaft (1) is provided with two key grooves (12) opposite to each other.

3. The Halbach rotor used in a high-speed motor according to claim 2, characterized in that: The shaft key (2) is a square block with smooth semicircular ends. The shaft key (2) is installed in a keyway (12) of the transmission shaft (1).

4. The Halbach rotor used in a high-speed motor according to claim 1, characterized in that: The iron core (3) is a cylinder, and the axis of the iron core (3) is provided with an axial hole (31) that cooperates with the transmission shaft (1) and the shaft key (2), and the shaft key (2) cooperates with the axial hole (31) to fix the iron core on the transmission shaft (1).

5. The Halbach rotor used in a high-speed motor according to claim 4, characterized in that: Iron core holes (32) are arranged at intervals around the shaft hole (31).

6. The Halbach rotor used in a high-speed motor according to claim 1, characterized in that: The outer ring (5) wraps the magnetic ring (4) as a whole, and the material of the outer ring (5) is carbon fiber.

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