阅读说明：本技术 一种用于超导单极电机的高转速低损耗磁性转子 (High-rotating-speed low-loss magnetic rotor for superconducting single-pole motor ) 是由 宋东彬 杨文将 白明亮 刘汝婧 王少鹏 李杨 于 2019-11-29 设计创作，主要内容包括：本发明属于电机技术领域,是一种用于超导单极电机的高转速低损耗磁性转子(0),包括转轴(1)、焊接结构(2)、不锈钢套(3)、碳纤维缠绕体(4)、结构玻璃钢(5)、导磁叠片(6)、N极永磁铁(7)、锁紧螺母(8)、键(9)和S极永磁铁(10)。此转子(0)配合同轴的固定超导励磁绕组(12)为超导单极电机提供旋转磁场,中空自引风风冷结构保证了转子工作环境稳定,混合励磁结构抑制了漏磁,提高了有效气隙磁密,无滑环供电结构保障了转子可以高转速工作,叠片式定向导磁结构降低了转子上铁耗,此结构可以明显提高电机的功率密度。(The invention belongs to the technical field of motors, and relates to a high-rotating-speed low-loss magnetic rotor (0) for a superconducting single-pole motor, which comprises a rotating shaft (1), a welding structure (2), a stainless steel sleeve (3), a carbon fiber winding body (4), structural glass fiber reinforced plastic (5), a magnetic conduction lamination (6), an N pole permanent magnet (7), a locking nut (8), a key (9) and an S pole permanent magnet (10). This rotor (0) cooperation coaxial fixed superconductive excitation winding (12) provides the rotating magnetic field for superconductive single pole motor, and cavity has been guaranteed rotor operational environment stably from induced air forced cooling structure, and the mixed excitation structure has restrained the magnetic leakage, has improved effective air gap flux density, and no sliding ring power supply structure has ensured that the rotor can high rotational speed work, and the directional magnetic conduction structure of lamination formula has reduced the iron loss on the rotor, and the power density of motor can obviously be improved to this structure.)

1. The invention relates to a high-rotating-speed low-loss magnetic rotor (0) for a superconducting single-pole motor, which is characterized by comprising a rotating shaft (1), a welding structure (2), a stainless steel sleeve (3), a carbon fiber winding body (4), structural glass fiber reinforced plastic (5), a magnetic conduction lamination (6), an N-pole permanent magnet (7), a locking nut (8), a key (9) and an S-pole permanent magnet (10). The rotating shaft (1) is matched with the magnetic conduction lamination (6) through the key (3) and the locking nut (8), the end face of the magnetic conduction lamination (6) is fixed by the welding structure (2) after pressurization, the two ends of the side face are respectively attached with the N pole permanent magnet (7) and the S pole permanent magnet (10), the middle section of the side face is attached with the structural glass fiber reinforced plastic (5), then the carbon fiber is wound and reinforced to be formed, and finally the stainless steel sleeve (3) is sleeved to increase the rigidity of the rotor and enhance the structural stability of the rotor.

2. A high speed, low loss magnetic rotor (0) for a superconducting homopolar machine according to claim 1 wherein the rotor (0) is a hybrid permanent magnet and electro-magnetic structure, hybrid excitation reduces magnetic leakage at rotor recesses, increases effective air gap flux density of the homopolar machine, and increases machine power density.

3. A high speed, low loss magnetic rotor (0) for a superconducting homopolar machine according to claim 1 wherein the magnetically conductive laminations (6) are made of high saturation magnetic conductive material, laminated and welded, carbon fiber wound and stainless steel double reinforced, and have the dual functions of directional magnetic conduction and rotor loss reduction, thereby increasing machine efficiency and motor power density.

4. A high-speed low-loss magnetic rotor (0) for a superconducting homopolar machine according to claim 1, wherein the rotating shaft (1) is a hollow self-induced air cooling structure, thereby reducing the difficulty of the rotor cooling structure and realizing weight reduction of the machine, thereby improving the power density of the machine.

Belongs to the technical field of:

the invention belongs to the technical field of motors, and particularly relates to a high-rotating-speed low-loss magnetic rotor for a superconducting monopole motor.

Background art:

the high-power airborne superconducting motor is an important support for realizing future multi-electric/full-electric aircrafts. The airborne motor has the characteristics of high power, high rotating speed, high power density, high efficiency and the like.

The superconducting single-pole motor is a form which most probably meets the requirements of the above airborne motors at the same time at present, but because the rotor of the superconducting single-pole motor works in a high-speed state, the sunken part can generate magnetic flux leakage which reduces the effective air gap flux density when the integral rotor with the multi-pole head works, and meanwhile, the motor can generate a large amount of harmonic components, the rotor can generate heat due to the harmonic waves, the magnetic conductivity is reduced, the air gap flux density is further reduced, and the working capacity of the motor is greatly reduced.

Therefore, the invention provides a high-rotating-speed low-loss magnetic rotor for a superconducting single-pole motor, aiming at the problems faced by the rotor of the superconducting single-pole motor, wherein the rotor adopts a hybrid excitation structure to reduce magnetic leakage, a hollow self-induced air cooling structure is used for cooling the rotor, and the lamination is pressed, welded and formed to reduce the loss of the rotor, so that the power density of the motor is improved.

The invention content is as follows:

in order to solve the problems of serious magnetic leakage of a rotor of a superconducting single-pole motor, heating of the rotor in a high-speed working state and the like, the invention provides a high-rotating-speed low-loss magnetic rotor for the superconducting single-pole motor.

In order to achieve the purpose, the invention provides a high-rotation-speed low-loss magnetic rotor (0) for a superconducting single-pole motor, which comprises a rotating shaft (1), a welding structure (2), a stainless steel sleeve (3), a carbon fiber winding body (4), structural glass fiber reinforced plastic (5), a magnetic conduction lamination (6), an N pole permanent magnet (7), a locking nut (8), a key (9) and an S pole permanent magnet (10). The rotating shaft (1) is matched with the magnetic conduction lamination (6) through the key (3) and the locking nut (8), the end face of the magnetic conduction lamination (6) is fixed by the welding structure (2) after pressurization, the two ends of the side face are respectively attached with the N pole permanent magnet (7) and the S pole permanent magnet (10), the middle section of the side face is attached with the structural glass fiber reinforced plastic (5), then the carbon fiber is wound and reinforced to be formed, and finally the stainless steel sleeve (3) is sleeved to increase the rigidity of the rotor and enhance the structural stability of the rotor.

The rotor (0) is of a permanent magnet and electro-magnetic mixed excitation structure, structural glass fiber reinforced plastics (5), an N pole permanent magnet (7) and an S pole permanent magnet (10) are attached to the side face of the magnetic conduction lamination (6), fixed by structural glue, reinforced by carbon fiber winding, and reinforced by a stainless steel sleeve to enhance the structural stability of the rotor;

the rotating shaft (1) is of a hollow self-induced air cooling structure, is in interference fit with the magnetic lamination (6), and meets torque transmission through a locking nut (8) and a key (9) triple force transmission mechanism;

the magnetic conduction lamination (6) is made of high-saturation magnetic conduction materials, and is formed by welding laminated end faces to form a directional magnetic conduction structure.

Preferably, the rotor (0) is a permanent magnet and electric excitation mixed excitation structure, so that the magnetic leakage at the sunken part of the rotor is reduced, and the effective air gap flux density of the single-pole motor is increased, thereby improving the power density of the motor;

preferably, the rotating shaft (1) is of a hollow self-induced air cooling structure, so that the weight of a cooling structure of the single-pole motor is reduced, and the power density of the motor is further improved;

preferably, the magnetic conduction lamination (6) is made of high-saturation magnetic conduction materials, is formed by laminating, welding and reinforcing carbon fiber winding and stainless steel, has double functions of directional magnetic conduction and rotor loss reduction, improves the power generation efficiency of the motor, and improves the power density of the motor.

In general, the present invention provides a high speed, low loss magnetic rotor for a superconducting homopolar machine that achieves the following effective gains:

1. according to the high-rotating-speed low-loss magnetic rotor for the superconducting single-pole motor, the rotor formed by multiple processes such as end face welding, circumferential carbon fiber winding, stainless steel reinforcement and the like is reliable in structure, suitable for high-speed working conditions and capable of meeting the high-rotating-speed requirement of an airborne motor;

2. according to the high-rotating-speed low-loss magnetic rotor for the superconducting single-pole motor, the rotor adopts the mixed excitation structure and the magnetic conduction lamination oriented magnetic conduction structure, so that the magnetic leakage of the rotor is reduced, the effective air gap flux density of the single-pole motor is improved, and the power density of the motor is improved.

3. According to the high-rotating-speed low-loss magnetic rotor for the superconducting single-pole motor, the rotor adopts the hollow self-induced air cooling structure, so that the working environment of the rotor is stable, the loss of the rotor is reduced by the lamination pressurizing welding forming directional magnetic conduction structure, the power generation efficiency of the motor is improved, and the power density of the motor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings in the embodiments are briefly described below, and the embodiments of the present invention are used together to explain the present invention, and do not constitute a limitation of the present invention.

In the drawings:

FIG. 1 is a schematic diagram of a high-speed low-loss magnetic rotor structure for a superconducting homopolar machine according to an embodiment;

FIG. 2 is a schematic diagram of an electromagnetic structure scheme of a superconducting monopole motor provided by an embodiment;

FIG. 3 is a cross-sectional view of a rotating shaft according to an embodiment;

FIG. 4 is a schematic structural diagram of a permanent magnet provided by the embodiment;

FIG. 5 is a schematic view of a rotor magnetic structure provided by the embodiment;

FIG. 6 is a schematic view of a structural glass fiber reinforced plastic structure provided by an embodiment.

In the figure, 0, rotor; 1. a rotating shaft; 2. welding a structure; 3. a stainless steel sleeve; 4. a carbon fiber wound body; 5. structural glass reinforced plastic; 6. magnetic conduction lamination; 7. an N-pole permanent magnet; 8. locking the nut; 9. a key; 10. an S pole permanent magnet; 11. the magnetic circuit is closed in an axial surrounding manner; 12. an excitation winding; 13. and the stator back iron.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Fig. 1 is a schematic diagram of a structural scheme of a high-speed low-loss magnetic rotor for a superconducting single-pole motor according to an embodiment, and the structural scheme includes a rotating shaft (1), a welding structure (2), a stainless steel sleeve (3), a carbon fiber winding body (4), structural glass fiber reinforced plastic (5), a magnetic conduction lamination (6), an N-pole permanent magnet (7), a lock nut (8), a key (9) and an S-pole permanent magnet (10). The rotating shaft (1) is matched with the magnetic conduction lamination (6) through the key (3) and the locking nut (8), the end face of the magnetic conduction lamination (6) is fixed by the welding structure (2) after pressurization, the two ends of the side face are respectively attached with the N pole permanent magnet (7) and the S pole permanent magnet (10), the middle section of the side face is attached with the structural glass fiber reinforced plastic (5), then the carbon fiber is wound and reinforced to be formed, and finally the stainless steel sleeve (3) is sleeved to increase the rigidity of the rotor and enhance the structural stability of the rotor.

FIG. 2 is a schematic diagram of an electromagnetic structure scheme of a superconducting monopole motor provided by an embodiment: the superconducting single-pole motor mainly comprises a rotor (0), an excitation winding (12) and a stator back iron (13), wherein the excitation winding (12) generates a magnetic field by direct current, the magnetic field is converged in the high-saturation magnetic-conductive rotor (0), then the magnetic field is guided to a right iron yoke of the stator back iron (13) from a right salient pole, the magnetic field is guided to a left iron yoke along the stator back iron in a directional mode, passes through an air gap again, returns to the left salient pole of the rotor (0), and then reaches the rotor (0) to form an axial encircling closed magnetic circuit (11).

The rotor (0) is a permanent magnet and electric excitation mixed excitation structure, the structural glass fiber reinforced plastics (5), the N pole permanent magnet (7) and the S pole permanent magnet (10) are attached to the side face of the magnetic conduction lamination (6), are fixed by structural glue, are reinforced by carbon fiber winding, and are reinforced by the stainless steel sleeve to enhance the structural stability of the rotor. The hybrid excitation structure reduces the magnetic leakage at the sunken part of the rotor, increases the effective air gap flux density of the single-pole motor and improves the power density of the motor.

The section view of the rotating shaft (1) provided by the embodiment of fig. 3 adopts a hollow self-induced air cooling structure, is in interference fit with the magnetic conduction lamination (6), and meets torque transmission through a triple force transmission mechanism of a locking nut (8) and a key (9). The structure of the rotating shaft reduces the weight of the cooling structure of the single-pole motor and improves the power density of the motor.

The schematic diagram of the structural glass fiber reinforced plastic structure provided by the embodiment of fig. 4, the structural glass fiber reinforced plastic ensures that the carbon fiber winding curvature is unchanged, so that the carbon fiber winding structure is uniformly stressed and has no stress concentration.

Fig. 5 is a schematic structural diagram of a permanent magnet provided by the embodiment: an N pole permanent magnet (7) and an S pole permanent magnet (10).

Fig. 6 is a magnetic conduction structure diagram of the rotor provided by the embodiment, the magnetic field direction of the permanent magnet is perpendicular to the rotating shaft along the radial direction, and the introduction of the permanent magnet reduces the magnetic leakage at the position, thereby effectively improving the air gap flux density of the single-pole motor. The magnetic conduction lamination (6) is made of high-saturation magnetic conduction materials, is formed by welding laminated end faces, is doubly reinforced by carbon fiber winding and stainless steel, has the double functions of directional magnetic conduction and reduction of rotor loss, improves the power generation efficiency of the motor, and improves the power density of the motor.

The above embodiments are merely for clearly illustrating the technical concepts and features of the present invention, so that those skilled in the art can easily understand and implement the present invention, and do not limit the present invention, and any modifications, equivalents, improvements, etc. made without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.