Radial magnetic bearing stator for magnetic suspension flywheel

Abstract

The utility model provides a radial magnetic bearing stator for a magnetic suspension flywheel, and belongs to the technical field of flywheel energy storage. The body is annular, a plurality of stator cores are arranged on the inner ring of the body, a first insulating plate, a second insulating plate, a third insulating plate and a fourth insulating plate are arranged on the sides, close to the body, of the stator cores, and coils are wound on the peripheries of the first insulating plate, the second insulating plate, the third insulating plate and the fourth insulating plate; the body is an annular cylinder, the stator cores are arranged in the length direction of the body, and the first insulating plate, the second insulating plate, the third insulating plate and the fourth insulating plate are arranged at the positions, wound around the coils, of the stator cores, so that the insulating effect is achieved, and the operation stability of the magnetic bearing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flywheel energy storage equipment, in particular to a radial magnetic bearing stator for a magnetic levitation flywheel. Background Art

[0002] Flywheel energy storage is a form of mechanical energy storage that uses the mechanical energy of the high-speed rotation of the flywheel rotor in conjunction with the motor to convert the flywheel's mechanical energy into electrical energy, thereby achieving the charge and discharge of the flywheel and completing the flywheel energy storage. Magnetic bearings have the advantages of being frictionless, low power, long-lasting, and oil-free. As a contactless bearing used to support the flywheel structure, the electromagnetic coil of the magnetic bearing is the core component of the electromagnetic bearing. The quality of its assembly process directly determines the operating stability of the magnetic bearing. Currently, there are usually two types of electromagnetic coil fixing structures. One is to use a customized skeleton to wrap the coil structure, and the other is to use insulating paper to wrap the magnetic bearing core and then directly put the electromagnetic coil on the core. Among them, the large inertia flywheel structure has a large magnetic bearing coil size. The cost of using a skeleton-outer-wound coil structure is high, which is not conducive to product cost control. The use of insulating paper wrapping structure has poor insulation and fixing effects on the electromagnetic coil, posing certain safety risks.

[0003] Therefore, there is an urgent need for a radial magnetic bearing stator for a magnetic levitation flywheel that is low-cost, stable in operation, and easy to install. Utility Model Content

[0004] In view of this, the utility model is adopted.

[0005] The technical solution of the present utility model is implemented as follows: a radial magnetic bearing stator for a magnetic levitation flywheel includes a body, the body is annular, a plurality of stator cores are arranged in the inner ring of the body, a first insulating plate, a second insulating plate, a third insulating plate and a fourth insulating plate are arranged on the side of the stator core close to the body, and coils are wound around the outer circumferences of the first insulating plate, the second insulating plate, the third insulating plate and the fourth insulating plate.

[0006] On the basis of the above technical solution, preferably, a first positioning plate and a second positioning plate are provided between adjacent stator cores, and the coil is provided between the first positioning plate and the second positioning plate.

[0007] On the basis of the above technical solution, preferably, it further comprises an inner ring, wherein the inner ring is fixedly arranged on the inner ring of the body, and the plurality of stator cores are fixedly arranged on the inner ring of the inner ring.

[0008] Based on the above technical solution, preferably, the main body includes a lifting ring and a fixed platform, and the lifting ring and the fixed platform are both arranged in the inner ring of the main body, the lifting ring is arranged at one end of the main body, the fixed platform is arranged at the other end of the main body, and the inner ring is arranged on the lifting ring.

[0009] On the basis of the above technical solution, preferably, it further comprises an upper protective cover, which is arranged around one end of the stator core and is fixedly arranged on the body and the inner ring.

[0010] On the basis of the above technical solution, preferably, the upper protective cover includes an upper fixing ring and an upper buckling ring, the upper fixing ring is arranged around the upper buckling ring, the upper buckling ring surrounds one end of the coil, and the upper fixing ring is fixedly arranged on the fixing platform and the inner ring.

[0011] On the basis of the above technical solution, preferably, it further comprises a lower protective cover, which is arranged around the other end of the stator core and is fixedly arranged on the body and the inner ring.

[0012] On the basis of the above technical solution, preferably, the lower protective cover includes a lower fixing ring and a lower buckling ring, the lower fixing ring is arranged around the lower buckling ring, the lower buckling ring surrounds one end of the coil, and the lower fixing ring is fixedly arranged on the lifting ring and the inner ring.

[0013] The utility model provides a radial magnetic bearing stator for a magnetic levitation flywheel with the following advantages over the prior art:

[0014] The main body is an annular cylinder, and a plurality of stator cores are arranged in the length direction of the main body. The first insulating plate, the second insulating plate, the third insulating plate and the fourth insulating plate are arranged at the position of the coil wound on the stator core to achieve insulation effect and improve the operation stability of the magnetic bearing;

[0015] The first, second, third, and fourth insulating plates are provided at the location where the coil is wound on the stator core, thereby preventing the coil from directly contacting the stator core and causing a short circuit or open circuit. The coil is wound on the first, second, third, and fourth insulating plates, making the arrangement of the coil more stable.

[0016] The first positioning plate and the second positioning plate clamp the coil in the middle. The first positioning plate and the second positioning plate are used to fix the position of the coil. The coil is more stable in the stator core, thereby improving the operating stability of the magnetic bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a three-dimensional diagram of a radial magnetic bearing stator for a magnetic levitation flywheel according to the present invention;

[0019] Figure 2 This is a cross-sectional view of a radial magnetic bearing stator for a magnetic levitation flywheel according to the present invention;

[0020] Figure 3 This is a partial structural diagram of a radial magnetic bearing stator for a magnetic levitation flywheel according to the present invention;

[0021] Figure 4 This is a structural schematic diagram of the stator core, the first insulating plate, the second insulating plate, the third insulating plate, the fourth insulating plate and the coil of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-4 As shown, a radial magnetic bearing stator for a magnetic levitation flywheel includes a body 1, which is annular in shape. Several stator cores 15 are disposed within the inner ring of the body 1. A first insulating plate 11, a second insulating plate 12, a third insulating plate 13, and a fourth insulating plate 14 are disposed adjacent to the side of the body 1. Coils 2 are wound around the outer circumferences of the first, second, third, and fourth insulating plates 11, 12, 13, and 14. The body 1 is an annular cylindrical structure with several stator cores 15 disposed along its length. The first, second, third, and fourth insulating plates 11, 12, 13, and 14 are positioned around the coils 2 wound around the stator cores 15, providing insulation and improving the operational stability of the magnetic bearing. A first insulating plate 11, a second insulating plate 12, a third insulating plate 13 and a fourth insulating plate 14 are provided at the position where the coil 2 is wound on the stator core 15, thereby preventing the coil 2 from directly contacting the stator core 15 and causing a short circuit or open circuit. The coil 2 is wound on the first insulating plate 11, the second insulating plate 12, the third insulating plate 13 and the fourth insulating plate 14, and the arrangement of the coil 2 is more stable.

[0024] A first positioning plate 31 and a second positioning plate 32 are provided between adjacent stator cores 15, and the coil 2 is provided between the first positioning plate 31 and the second positioning plate 32. The first positioning plate 31 and the second positioning plate 32 sandwich the coil 2 and are used to fix the position of the coil 2, making the coil 2 more stable in the stator core 15 and improving the operating stability of the magnetic bearing.

[0025] The main body 1 further includes an inner ring 16, which is fixedly mounted on the inner ring of the main body 1. The stator cores 15 are fixedly mounted on the inner ring of the inner ring 16. The inner ring 16 is connected to the stator core 15, and the main body 1 protects the inner ring 16 and the stator core 15 from damage.

[0026] The body 1 includes a lifting ring 111 and a fixing platform 112. The lifting ring 111 and the fixing platform 112 are both arranged in the inner ring of the body 1. The lifting ring 111 is arranged at one end of the body 1, and the fixing platform 112 is arranged at the other end of the body 1. The inner ring 16 is arranged on the lifting ring 111. The lifting ring 111 is used to place the inner ring 16, so that the placement accuracy of the inner ring 16 is improved, thereby improving the installation accuracy of the entire device.

[0027] The stator body 1 also includes an upper protective cover 4, which is arranged around one end of the stator core 15 and is fixed to the body 1 and the inner ring 16. The upper protective cover 4 is used to limit the position of the inner ring 16 and the coil 2 on the stator core 15, while protecting the stator core 15 and the coil 2.

[0028] The upper protective cover 4 includes an upper fixing ring 41 and an upper buckling ring 42. The upper fixing ring 41 is arranged around the upper buckling ring 42, and the upper buckling ring 42 surrounds one end of the coil 2. The upper fixing ring 41 is fixed to the fixing platform 112 and the inner ring 16. The upper protective cover 4 buckles the coil 2 and the stator core 15 inside via the upper buckling ring 42. The upper fixing ring 41 is fixed to the fixing platform 112 and the inner ring 16 with bolts.

[0029] The stator body 1 further includes a lower protective cover 5, which is disposed around the other end of the stator core 15 and is fixed to the body 1 and the inner ring 16. The lower protective cover 5 limits the position of the inner ring 16 and the coil 2 on the stator core 15, while protecting the stator core 15 and the other end of the coil 2.

[0030] The lower protective cover 5 includes a lower fixing ring 51 and a lower buckling ring 52. The lower fixing ring 51 is arranged around the lower buckling ring 52, which surrounds one end of the coil 2. The lower fixing ring 51 is fixed to the lifting ring 111 and the inner ring 16. The lower protective cover 5 buckles the coil 2 and the stator core 15 inside via the lower buckling ring 52. The lower fixing ring 51 is fixed to the lifting ring 111 and the inner ring 16 with bolts.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radial magnetic bearing stator for a magnetic levitation flywheel, comprising a body (1), wherein the body (1) is annular, and a plurality of stator cores (15) are provided in the inner ring of the body (1), characterized in that: A first insulating plate (11), a second insulating plate (12), a third insulating plate (13) and a fourth insulating plate (14) are provided on one side of the stator core (15) close to the body (1), and a coil (2) is wound around the outer periphery of the first insulating plate (11), the second insulating plate (12), the third insulating plate (13) and the fourth insulating plate (14).

2. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 1, characterized in that: A first positioning plate (31) and a second positioning plate (32) are provided between adjacent stator cores (15), and the coil (2) is provided between the first positioning plate (31) and the second positioning plate (32).

3. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 1, wherein: It also includes an inner ring (16), wherein the inner ring (16) is fixedly arranged on the inner ring of the body (1), and a plurality of the stator cores (15) are fixedly arranged on the inner ring of the inner ring (16).

4. A radial magnetic bearing stator for a magnetic levitation flywheel according to claim 3, characterized in that: The body (1) includes a lifting ring (111) and a fixing platform (112), wherein the lifting ring (111) and the fixing platform (112) are both arranged on the inner ring of the body (1), the lifting ring (111) is arranged at one end of the body (1), the fixing platform (112) is arranged at the other end of the body (1), and the inner ring (16) is arranged on the lifting ring (111).

5. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 4, characterized in that: It also includes an upper protective cover (4), which is arranged around one end of the stator core (15) and is fixedly arranged on the body (1) and the inner ring (16).

6. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 5, characterized in that: The upper protective cover (4) comprises an upper fixing ring (41) and an upper buckling ring (42), wherein the upper fixing ring (41) is arranged around the upper buckling ring (42), and the upper buckling ring (42) surrounds one end of the coil (2), and the upper fixing ring (41) is fixedly arranged on the fixing platform (112) and the inner ring (16).

7. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 3, characterized in that: It also includes a lower protective cover (5), which is arranged around the other end of the stator core (15), and the lower protective cover (5) is fixedly arranged on the body (1) and the inner ring (16).

8. The radial magnetic bearing stator for a magnetic levitation flywheel according to claim 7, characterized in that: The lower protective cover (5) comprises a lower fixing ring (51) and a lower buckling ring (52), wherein the lower fixing ring (51) is arranged around the lower buckling ring (52), and the lower buckling ring (52) surrounds one end of the coil (2), and the lower fixing ring (51) is fixedly arranged on the lifting ring (111) and the inner ring (16).

Images