CN117879210B - Secondary iron core, linear motor, electromagnetic suspension and vehicle - Google Patents
Secondary iron core, linear motor, electromagnetic suspension and vehicle Download PDFInfo
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- CN117879210B CN117879210B CN202410272311.7A CN202410272311A CN117879210B CN 117879210 B CN117879210 B CN 117879210B CN 202410272311 A CN202410272311 A CN 202410272311A CN 117879210 B CN117879210 B CN 117879210B
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- 239000000725 suspension Substances 0.000 title claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title abstract description 29
- 230000004323 axial length Effects 0.000 claims description 20
- 238000003756 stirring Methods 0.000 abstract description 4
- 238000013016 damping Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The application discloses a secondary iron core, a linear motor, an electromagnetic suspension and a vehicle. The secondary iron core comprises a first section, a middle section and a second section, wherein the first section and the second section are respectively connected to two opposite ends of the middle section, and the first section and the second section are respectively formed by connecting a non-magnet body and a first magnetic ring. The secondary iron core structure can reduce electromagnetic resistance, reduce pulse vibration magnetic field, reduce thrust stirring and improve the stability of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a secondary iron core, a linear motor, an electromagnetic suspension and a vehicle.
Background
In the related art, the characteristics of the break of the two ends of the primary iron core in the linear motor lead the magnetic field distribution at the two ends of the stator to be complex, the air gap field at the end part is suddenly changed, when the rotor permanent magnet runs close to the end part of the stator, the rotor permanent magnet and the end part of the stator act to generate end force, the end effect can generate pulse vibration magnetic field in the air gap, and the magnetic field is opposite to the running direction of the travelling wave magnetic field, so that the motor generates vibration noise, increases thrust fluctuation and is very difficult to control.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
An object of the present invention is to provide a new solution for a secondary core.
According to a first aspect of the present invention, a secondary core is provided. The secondary core includes: the first section, the middle section and the second section are respectively connected to two opposite ends of the middle section; wherein the first section and the second section are respectively formed by connecting a non-magnet and the magnetic ring.
Optionally, at least one of the first section and the second section includes a plurality of the non-magnets and the first magnetic ring, and the plurality of the non-magnets and the first magnetic ring are alternately connected.
Optionally, the middle section includes a plurality of axial magnetic charging rings and a plurality of radial magnetic charging rings, and the axial magnetic charging rings and the radial magnetic charging rings are alternately arranged.
Optionally, the first magnetic ring is magnetically charged in a radial direction.
Optionally, the axial length of the non-magnet is equal to the axial length of the axial charging ring.
Optionally, the axial length of the first segment is equal to the axial length of the second segment.
Optionally, the middle section includes a plurality of unit periods, a plurality of the axial magnetic charging rings and a plurality of the radial magnetic charging rings are alternately connected to form a unit period, the length of one unit period is H, and the sum of the lengths of the first section and the second section is H or 2H.
Optionally, the non-magnet comprises a soft magnet.
According to a second aspect of the present invention, a linear motor is provided. The linear motor comprises a primary iron core and the secondary iron core in the embodiment, wherein the secondary iron core is sleeved on the outer side of the primary iron core in a sliding mode.
Optionally, the intermediate section includes a plurality of unit periods, a length of one unit period is H, a length of the secondary core is L, L/h=n, a length of the primary core is Ls, and Ls/h=m;
when m is less than n and less than or equal to m+2, the length sum of the first section and the second section is H, and when m+2 is less than or equal to n and less than or equal to m+6, the length sum of the first section and the second section is 2H.
Optionally, the length of the primary core is smaller than the length of the secondary core.
According to a third aspect of the present invention, there is provided an electromagnetic suspension. The electromagnetic suspension comprises a damping component and the linear motor of the embodiment, wherein the damping component is connected with the linear motor.
According to a fourth aspect of the present invention, a vehicle is provided. The vehicle comprises a vehicle body and the electromagnetic suspension of the embodiment, wherein the vehicle body is connected with the electromagnetic suspension.
The secondary iron core comprises a first section, a middle section and a second section, wherein the first section and the second section are respectively connected to two opposite ends of the middle section, and the first section and the second section are respectively formed by connecting a non-magnet body and a first magnetic ring. The secondary iron core structure can reduce electromagnetic resistance, reduce pulse vibration magnetic field, reduce thrust stirring and improve the stability of the motor.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view showing a partial structure of a linear motor according to an embodiment of the present application.
Fig. 2 is a schematic partial structure of a linear motor according to an embodiment of the present application.
Fig. 3 is a schematic view of a partial structure of a linear motor according to an embodiment of the present application.
Fig. 4 is a schematic view showing a partial structure of a linear motor according to an embodiment of the present application.
Reference numerals illustrate:
1. A primary iron core; 11. intermediate stator teeth; 12. a first stator tooth; 13. a second stator tooth;
2. A secondary core; 21. a first section; 22. an intermediate section; 23. a second section; 24. axially filling a magnetic ring; 25. radial magnetic ring filling; 26. a non-magnet;
3. A housing.
Detailed Description
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
According to an embodiment of the present application, there is provided a secondary core 2. As shown in fig. 1 to 4, the secondary core 2 includes a first segment 21, a middle segment 22, and a second segment 23, and the first segment 21 and the second segment 23 are connected to opposite ends of the middle segment 22, respectively. Wherein the first section 21 and the second section 23 are formed by connecting a non-magnet 26 and a first magnetic ring, respectively.
In this example, the secondary core 2 includes a plurality of magnetic rings, and the secondary core 2 is provided as a first section 21, a middle section 22, and a second section 23, the first section 21 and the second section 23 being connected to opposite ends of the middle section 22, respectively, the first section 21 and the second section 23 being formed by connecting a non-magnet 26 and the magnetic rings, respectively. The structure of the secondary iron core 2 can weaken the magnetic fields at the two ends of the secondary iron core 2 to reduce the end force at the two ends of the secondary iron core 2, thereby reducing electromagnetic resistance, reducing pulse vibration magnetic field, reducing thrust stirring and improving the stability of the motor.
As shown in fig. 2 to 4, the secondary core 2 is formed by connecting a plurality of magnetic rings, and the secondary core 2 is divided into a first section 21, an intermediate section 22, and a second section 23 in the axial direction. The first section 21 and the second section 23 are connected to axially opposite ends of the intermediate section 22, respectively. Wherein the first segment 21 is formed by the attachment of a non-magnet 26 and a first magnetic ring. The second section 23 is formed by alternating connection of non-magnets 26 and first magnetic rings. The secondary iron core 2 is provided with the structures of the first section 21 and the second section 23, so that electromagnetic resistance can be reduced, pulse vibration magnetic field can be reduced, pushing force can be reduced, and the stability of the motor can be improved.
The first section 21 and the second section 23 of the two ends of the secondary core 2 are formed by connecting a non-magnet 26 and a first magnetic ring. By providing the non-magnets 26 at both ends of the secondary core 2 to weaken the magnetic field at both ends of the secondary core 2, it is possible to reduce the pulse vibration magnetic field and the end air gap magnetic field distortion by reducing the magnetic field distribution at both ends of the mover. The pulse vibration magnetic field is formed by the superposition of the three magnetic fields, wherein the pulse vibration magnetic field is formed by dividing an air gap magnetic field into a traveling wave magnetic field of positive sequence, a zero sequence magnetic field and a reverse sequence magnetic field, and the winding distribution of the linear motor is discontinuous, so that the three-phase windings of the motor generate unequal three-phase mutual inductance, and therefore asymmetric three-phase current is generated. And the traveling wave magnetic field is generated in the air gap by the fact that the linear motor is electrified with three-phase alternating current, and the traveling wave magnetic field is distributed in a sine way along the axial direction. The traveling wave magnetic field generated by the cylindrical linear motor interacts with the magnetic field generated by the secondary permanent magnet to generate effective electromagnetic thrust.
In this example, two adjacent first magnetic rings and the non-magnet 26 may be fixedly connected by glue bonding. The first magnetic ring and the non-magnet 26 may be connected by other connection methods, and those skilled in the art may be determined according to actual situations, which are not specifically limited herein.
In one example, as shown in fig. 1 to 4, at least one of the first section 21 and the second section 23 includes a plurality of the non-magnets 26 and the first magnetic ring, and a plurality of the non-magnets 26 and the first magnetic ring are alternately connected.
In this example, the first segment 21 may include a plurality of non-magnets 26 and a plurality of first magnetic rings, and the plurality of non-magnets 26 and the plurality of first magnetic rings may be alternately connected. Alternatively, the second section 23 may include a plurality of non-magnets 26 and a plurality of first magnetic rings, and the plurality of non-magnets 26 and the plurality of first magnetic rings may be alternately connected.
Wherein the number of non-magnets 26 in the first section 21 and the second section 23 may be two, three, four, etc., and the number of the first magnetic rings and the non-magnets 26 may be equal. The number of non-magnets 26 is not particularly limited as will be apparent to those skilled in the art, depending on the actual situation.
In one example, as shown in fig. 4, the first magnetic ring is magnetically charged in a radial direction. That is, the first magnetic ring may have the same structure as the radial charging ring 25. The magnetic fields at the two ends can be weakened, and the influence on the thrust of the secondary iron core can be reduced.
As shown in fig. 2 to 4, the first segment 21 is formed by alternately connecting a first magnetic ring and a non-magnet 26. Wherein the magnetic rings may be magnetically charged in a radial direction, the first magnetic rings and the non-magnets 26 are alternately connected to form the first segment 21. The magnetic ring in the first section 21 may also be arranged to be magnetized in the axial direction, i.e. the structure of the first magnetic ring is identical to the structure of the axial magnetic ring 24. As to the structure of the first section 21, those skilled in the art can determine the actual situation, and are not particularly limited herein.
In this example, the second section 23 may be provided in the same structure as the first section 21. I.e. the second segment 23 is also formed by alternating connection of the first magnetic ring and the non-magnet 26. Wherein, the magnetic ring can be radial magnetizing arrangement. The first magnetic ring in the second section 23 may also be arranged in an axial magnetizing arrangement. As to the structure of the second section 23, those skilled in the art can determine the actual situation, and are not particularly limited herein.
The first segment 21 may be the same number of non-magnets 26 as in the second segment 23. For example, the first section 21 and the second section 23 are formed by alternately connecting two first magnetic rings and two non-magnets 26, respectively.
In one example, the intermediate section 22 includes a plurality of axial magnetic charging rings 24 and a plurality of radial magnetic charging rings 25, and the axial magnetic charging rings 24 and the radial magnetic charging rings 25 are alternately arranged. The axial direction is the linear movement direction of the secondary core 2, and the radial direction is the radial direction of the secondary core 2. The axial magnetic charging ring 24 and the radial magnetic charging ring 25 may be connected by means of glue bonding.
As shown in fig. 2 and 3, the second section 23 includes a plurality of axial magnetic charging rings 24 and a plurality of radial magnetic charging rings 25. The intermediate section 22 is formed by alternately connecting a plurality of axial magnetic charging rings 24 and radial magnetic charging rings 25. The magnetic rings of the middle section 22 are distributed in a halbach array, namely, an axial and radial magnetizing alternating arrangement mode is adopted, and the permanent magnets adopting the array mode lead the rotor to strengthen the magnetic field close to the air gap and weaken the magnetic field far away from the air gap, so that the electromagnetic air gap magnetic flux is increased, the magnetic flux of the magnetic yoke is reduced, and the thrust density of the motor is improved.
In this example, as shown in fig. 1, the direction of the axial magnetic charging ring 24 may be divided up and down, and the direction of the radial magnetic charging ring 25 may be divided left and right. The magnetic rings of the middle section 22 can be formed by alternately connecting up and down, left and right in turn. Of course, regarding the arrangement of the magnetic rings, those skilled in the art may depend on the practical situation, and are not specifically limited herein.
In one example, the axial length of the non-magnet 26 is equal to the axial length of the axial charging ring 24.
As shown in fig. 2 and 3, the non-magnet 26 in the first section 21 and the second section 23 has a ring-like structure, and the axial length of the non-magnet 26 is equal to the axial length of the axial magnetism charging ring 24. That is, the outer diameter of the non-magnet 26 is the same as the radial direction of the first magnetic ring, and the axial length of the non-magnet 26 is the same as the axial length of the axial magnetic charging ring 24.
In this example, the outer diameters of the axial magnetic-charging ring 24 and the radial magnetic-charging ring 25 are the same, and a plurality of magnetic rings are connected to form the cylindrical secondary core 2. The axial length of the axial magnetism charging ring 24 may be set to be greater than the length of the radial magnetism charging ring 25. Of course, the axial length of the axial magnetic charging ring 24 may be less than or equal to the length of the radial magnetic charging ring 25, and those skilled in the art may depend on the actual situation, and is not specifically limited herein.
In one example, the axial length of the first section 21 is equal to the axial length of the second section 23.
The axial length of the first section 21 is equal to the axial length of the second section 23, i.e. the number of non-magnets 26 in the first section 21 and the second section 23 is equal and the number of first magnetic rings in the first section 21 and the second section 23 is also equal. For example, the number of non-magnets 26 of the first and second sections 21, 23 may be set to two, three, four, or the like. Those skilled in the art will recognize the actual situation, and are not particularly limited herein.
In one example, as shown in fig. 1 to 4, the intermediate section 22 includes a plurality of unit periods, a plurality of the axial magnetic charging rings 24 and a plurality of the radial magnetic charging rings 25 are alternately connected to form one unit period, and the length of one unit period is set to be H, and the sum of the lengths of the first section 21 and the second section 23 is set to be H or 2H.
As shown in fig. 1 to 4, in this example, the length of one unit cycle of the intermediate section 22 is set to H. For example, one unit cycle includes four axial magnetic charging rings 24 and four radial magnetic charging rings 25 alternately connected. Of course, regarding the unit cycle of the motor, those skilled in the art may set according to actual circumstances, and are not particularly limited herein.
In this example, as shown in fig. 2, the sum of the lengths of the first section 21 and the second section 23 is set to H, and the first section 21 and the second section 23 are each half a unit cycle long. That is, the first section 21 is constituted by alternately connecting two radial magnetic charging rings 25 and two non-magnets 26, and the second section 23 is constituted by alternately connecting two radial magnetic charging rings 25 and two non-magnets 26.
Of course, as shown in fig. 3, the sum of the lengths of the first section 21 and the second section 23 may be set to 2H, and the first section 21 and the second section 23 are each one unit cycle long. That is, the first section 21 includes four first magnetic rings and four non-magnets 26 alternately connected, and the second section 23 includes four first magnetic rings and four non-magnets 26 alternately connected. Or the sum of the lengths of the first section 21 and the second section 23 may be set to other values, and those skilled in the art may set the values according to actual situations, which are not particularly limited herein.
In one example, the non-magnet 26 comprises a soft magnetic body. The non-magnet 26 may be a ring structure made of soft magnetic material. Wherein the soft magnetic material refers to a magnetic material having a low coercive force and a high permeability when magnetization occurs at Hc of not more than 1000A/m. For example, the soft magnetic material may be a steel No. 10 or the like, and those skilled in the art will recognize the actual situation, and is not particularly limited herein.
According to another embodiment of the present application, a linear motor is provided. The linear motor comprises a primary iron core 1 and a secondary iron core 2 in the embodiment, wherein the secondary iron core 2 is sleeved on the outer side of the primary iron core 1 in a sliding manner, and the secondary iron core 2 can slide relative to the primary iron core 1 so as to realize the function of the linear motor.
As shown in fig. 1 to 4, in this example, the secondary core 2 includes a first segment 21, a middle segment 22, and a second segment 23, the first segment 21 and the second segment 23 being connected to opposite ends of the middle segment 22, respectively, and the first segment 21 and the second segment 23 being formed by alternately connecting a non-magnet 26 and a first magnetic ring, respectively. The structure of the secondary iron core 2 can weaken the magnetic fields at the two ends of the secondary iron core 2 to reduce the end force at the two ends of the secondary iron core 2, thereby reducing electromagnetic resistance, reducing pulse vibration magnetic field, reducing thrust stirring and improving the stability of the motor.
In one example, the intermediate section 22 includes a plurality of unit periods, one unit period having a length H, the secondary core 2 having a length L, and L/h=n, the primary core 1 having a length Ls, and Ls/h=m; wherein when m < n is less than or equal to m+2, the sum of the lengths of the first section 21 and the second section 23 is H, and when m+2 is less than or equal to m+6, the sum of the lengths of the first section 21 and the second section 23 is 2H.
As shown in fig. 1, in this example, the intermediate section includes a plurality of unit periods, a plurality of the axial magnetic charging rings and a plurality of the radial magnetic charging rings are alternately connected to form one unit period, the length of one unit period is set to H, the length of the secondary core 2 is set to L, the motor unit period is set to H, and L/h=n. Let the length of the primary core 1 be Ls, and Ls/h=m. Wherein when m < n.ltoreq.m+2, the sum of the lengths of the first section 21 and the second section 23 is set to H. At the moment, the no-load magnetic resistance can be effectively reduced without greatly influencing the load electromagnetic output.
When m+2 < n.ltoreq.m+6, the sum of the lengths of the first section 21 and the second section 23 is set to 2H. The no-load magnetic resistance can be greatly reduced, the control difficulty of the motor is greatly reduced, and the motor can be ensured to normally run. Wherein, the motor magnetic resistance mainly comprises tooth space force and end effect stress. The cogging force is mainly caused by inconsistent acting force of a permanent magnet magnetic field on two sides of a cogging caused by slotting of a stator core (magnetic resistance of a cogging magnetic circuit is different caused by different magnetic permeability of air and the core so that magnetic field energy storage is changed). The end force is caused by the fact that the stator core is opened, the three-phase windings of the motor are not aligned, and the air gap field of the linear motor is distorted at the end, so that the two ends of the core are caused by the magnetic force difference of the rotor permanent magnet field.
In one example, as shown in fig. 1, the length of the primary core 1 is smaller than the length of the secondary core 2, and the linear motor has a structure in which the primary core 1 of the circular linear motor is short and the secondary core 2 is long. The linear motor further comprises a housing 3, and the housing 3 is sleeved on the periphery of the secondary assembly.
As shown in fig. 1 and 4, the primary core 1 is provided with a plurality of stator teeth at intervals in the axial direction, the stator teeth including a first stator tooth 12 and a second stator tooth 13 respectively located at both ends of the primary core 1, and an intermediate stator tooth 11 located between the first stator tooth 12 and the second stator tooth 13; the thickness of the first stator tooth 12 and the second stator tooth 13 is smaller than the thickness of the intermediate stator tooth 11, or the thickness of the first stator tooth 12 and the second stator tooth 13 is larger than the thickness of the intermediate stator tooth 11. The primary iron core 1 can reduce end effect stress to reduce no-load magnetic resistance of the motor, so that the motor can output larger thrust density and reduce no-load magnetic resistance.
As shown in fig. 2, the linear motor pole pitch Zp is set such that the thickness of the first stator teeth 12 is smaller than the thickness of the intermediate stator teeth 11 by L1, and the thickness of the second stator teeth 13 is smaller than the thickness of the intermediate stator teeth 11 by L2. Wherein, L1 and L2 satisfy: l1+l2=zp/2.
In this example, the thicknesses of the first stator teeth 12 and the second stator teeth 13 are smaller than the thickness of the intermediate stator teeth 11, and the difference in thickness between the first stator teeth 12 and the intermediate stator teeth 11 is L1, and the difference in thickness between the second stator teeth 13 and the intermediate stator teeth 11 is L2. Wherein L1 can be equal to L2 and is Zp/4. Or L1 may not be equal to L2. Those skilled in the art will recognize the actual situation, and are not particularly limited herein.
As shown in fig. 4, the thickness of the intermediate stator teeth 11 is St, and the thickness of the first stator teeth 12 is S1. And St and S1 are satisfied, s1=st/4. I.e. the thickness of the first stator tooth 12 is smaller than the rear of the intermediate stator tooth 11 and equal to one quarter of the thickness of the intermediate stator tooth 11.
In this example, the thickness of the second stator teeth 13 is also smaller than the thickness of the intermediate stator teeth 11. The thickness of the second stator teeth 13 may also be one quarter of the thickness of the intermediate stator teeth 11. Of course, the specific thickness of the second stator teeth 13 may be determined by one skilled in the art according to the actual situation.
In this example, the linear motor may be a three-slot four-pole motor, and the stator slots of the primary core 1 are provided with a double-layer two-phase winding structure.
According to another embodiment of the present application, an electromagnetic suspension is provided. An electromagnetic suspension is provided. The electromagnetic suspension comprises a damping assembly and the linear motor of the above embodiment. The damping component is connected with the linear motor to form an electromagnetic suspension. Of course, regarding the practical application environment of the linear motor of the present application, those skilled in the art may choose according to the practical situation, and are not particularly limited herein.
According to another embodiment of the present application, a vehicle is provided. The vehicle includes a vehicle body and the electromagnetic suspension of the above embodiment. The electromagnetic suspension is connected with the vehicle body to maintain the stability of the vehicle in operation.
The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. A secondary core, comprising:
A first section (21), an intermediate section (22) and a second section (23), the first section (21) and the second section (23) being connected to opposite ends of the intermediate section (22), respectively;
The first section (21) and/or the second section (23) are formed by connecting a non-magnet (26) and a first magnetic ring, the middle section (22) comprises a plurality of axial magnetic charging rings (24) and a plurality of radial magnetic charging rings (25), and the axial magnetic charging rings (24) and the radial magnetic charging rings (25) are alternately arranged.
2. The secondary core according to claim 1, characterized in that the first segment (21) and/or the second segment (23) comprises a plurality of the non-magnets and the first magnetic ring, which are alternately connected.
3. The secondary core of claim 1, wherein the first magnetic ring is a radial charging ring.
4. The secondary core of claim 1, wherein the axial length of the non-magnet (26) is equal to the axial length of the axial charging ring (24).
5. A secondary core according to claim 1, characterized in that the axial length of the first segment (21) is equal to the axial length of the second segment (23).
6. The secondary core according to claim 1, characterized in that the intermediate section comprises a plurality of unit cycles, a plurality of the axial magnetic-charging rings and a plurality of the radial magnetic-charging rings being alternately connected to form one unit cycle, the length of one unit cycle being H, the sum of the lengths of the first section (21) and the second section (23) being H or 2H.
7. The secondary core of claim 1, wherein the non-magnet (26) comprises a soft magnet.
8. A linear motor comprising a primary core and a secondary core as claimed in any one of claims 1 to 7, said secondary core being slidably disposed over said primary core.
9. The linear motor of claim 8, wherein the intermediate section includes a plurality of unit periods, a length of one unit period being H, a length of the secondary core being L, and L/H = n, a length of the primary core being Ls, and Ls/H = m;
Wherein when m < n is less than or equal to m+2, the sum of the lengths of the first section (21) and the second section (23) is H, and when m+2 is less than or equal to m+6, the sum of the lengths of the first section (21) and the second section (23) is 2H.
10. The linear motor of claim 8, wherein the intermediate section includes a plurality of unit periods, a length of one unit period being H, a length of the secondary core being L, and L/H = n, a length of the primary core being Ls, and Ls/H = m;
Wherein when m < n is less than or equal to m+2, the sum of the lengths of the first section (21) and the second section (23) is H, and when m+2 is less than or equal to m+6, the sum of the lengths of the first section (21) and the second section (23) is 2H.
11. An electromagnetic suspension comprising a damper assembly and a linear motor according to any one of claims 8 to 10, the damper assembly being arranged in connection with the linear motor.
12. A vehicle comprising a vehicle body, and the electromagnetic suspension according to claim 11, the vehicle body being provided in connection with the electromagnetic suspension.
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| CN202410272311.7A CN117879210B (en) | 2024-03-11 | 2024-03-11 | Secondary iron core, linear motor, electromagnetic suspension and vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101911451A (en) * | 2007-12-28 | 2010-12-08 | Thk株式会社 | Linear stepping motor |
| CN101527494A (en) * | 2009-04-27 | 2009-09-09 | 青岛同日电机有限公司 | Flat plate type linear motor |
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