Magnetic field migration method and device based on staggered superposed coils

Abstract

The invention relates to a mobile magnetic field generation method and device based on multi-coil dislocation superposition, and solves the problems of intermittent magnetic field disconnection, large magnetic field fluctuation and low energy efficiency caused by phase opening, phase closing and positive and negative control required by traditional coil magnetic field movement. One group or more coils are overlapped in a staggered manner in one group of coils and are partially overlapped in space to form a continuous coverage area, smooth migration of a magnetic field is realized through uninterrupted magnetic field movement, and the stability and energy efficiency of the magnetic field are improved. The method is suitable for linear motors, rotating motors, magnetic suspension driving and other scenes needing directional movement of the magnetic field.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic field control technology, specifically to a method and apparatus for generating a moving magnetic field based on the staggered superposition of multiple coils, applicable to scenarios requiring directional moving magnetic fields such as linear motors, rotary motors, magnetic levitation drives, and axial motors. Background Technology

[0002] Traditional coil magnetic field movement requires phase opening and closing and forward and reverse control, which has problems such as intermittent magnetic field disconnection, large magnetic field fluctuation, and low energy efficiency. Summary of the Invention

[0003] This invention is a method and apparatus for generating a moving magnetic field based on the staggered superposition of multiple coils. It solves the problems of intermittent magnetic field disconnection, large magnetic field fluctuation and low energy efficiency caused by the need for phase opening and closing and positive and negative control of traditional coil magnetic field movement. Through the staggered superposition structure, one or more coils are staggered and partially overlapped in space to form a continuous coverage area. The uninterrupted magnetic field movement realizes smooth magnetic field migration and improves magnetic field stability and energy efficiency.

[0004] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows:

[0005] This application provides a magnetic field migration method based on misaligned superimposed coils, including:

[0006] Spatial arrangement structure: Two sets of coils are partially overlapped in space to form a continuously covered magnetic field region;

[0007] Timing control module: Perform the following operations according to its configuration:

[0008] First stage: Turn on coil group A to generate a magnetic field a covering region A;

[0009] Second stage: Turn on coil group B to generate magnetic field b covering region B; extend the magnetic field covering region B from a to b.

[0010] Third stage: Disconnect coil group A, leave coil group B conducting, so that the magnetic field contracts to region b;

[0011] Continuity guarantee mechanism: During the migration process, at least one set of coils is always kept on.

[0012] Optionally, when there are more than 2 overlapping coils in a group of coils, let it be N. When N > 2, a continuous conduction strategy for the coils in the direction of magnetic field migration is adopted: during the magnetic field migration process, the coils located in the direction of magnetic field migration remain on during the switching phase. That is, in the case of overlapping from the Nth to the top, the coils of group N-1 remain on.

[0013] Optionally, the magnetic field range can be expanded: the magnetic field range can be expanded by increasing the number of coil groups and the number of coils stacked within each group, with each coil group containing at least one stacked coil; the continuous magnetic field coverage area between adjacent coil groups can be expanded by increasing the number of overlapping coils, for example:

[0014] For the sequentially arranged overlapping coil groups A, B, and C, the control flow includes:

[0015] The conducting coil group A+B is activated; a magnetic field is generated covering areas a and b.

[0016] The conducting coil group A+B+C generates a magnetic field covering regions a, b, and c;

[0017] And disconnect coil group A, so that the magnetic field contracts to regions b and c, in which two groups of coils remain conducting.

[0018] Optionally, the spatial arrangement structure further includes: one or more coil groups are staggered and superimposed within a single coil group, with the front ends of each coil group arranged sequentially to form a front end coverage area, and the rear ends of each coil group arranged sequentially to form a rear end coverage area; through the superposition of the magnetic fields of the front end coverage area and the rear end coverage area, the combined magnetic field maintains lateral force balance during migration.

[0019] Optionally, when the three coil groups form a control group in a staggered superposition manner, the timing control module executes:

[0020] Step 1: The first and second coil groups are energized with current in the same direction to generate the first combined magnetic field;

[0021] Step 2: The first coil group is disconnected in a controlled manner, and the third coil group is activated simultaneously with a current in the same direction, so that the combined magnetic field is smoothly translated from the first combined magnetic field to the second combined magnetic field; during the period when the first to third coil groups work together, the direction of the resultant force at the front end is opposite to the direction of the resultant force at the rear end, so as to achieve a symmetrical balance in the longitudinal distribution of the magnetic field.

[0022] Optionally, the arrangement of the two sets of coils partially overlapping in space includes: continuing to superimpose a third coil set within the second coil set, and continuing to superimpose a fourth coil set within the third coil set, and so on, forming a continuously moving magnetic field track by repeatedly cascading and superimposing coil sets in linear, circular, or axial space.

[0023] Optionally, in the staggered superposition structure, when the number of coil groups is 4: the equivalent half-pole pitch of the synthetic magnetic field is increased to the area of ​​4 slots; the rotor magnetic poles switch magnetic fields within the travel span of the area of ​​the 4 slots to enhance the magnetic field driving force.

[0024] This application also provides a magnetic field migration device based on misaligned superimposed coils, including:

[0025] A coil assembly includes multiple coil groups arranged in a staggered superposition manner, wherein the coil groups partially overlap in space to form a continuously covering magnetic field region.

[0026] A control module, connected to the coil assembly, is used to control the switching on and off of each of the coil groups according to the method of any one of claims 1-7, so that the synthetic magnetic field generated by the coil assembly migrates smoothly in a preset direction; wherein, the structure of the coil assembly enables the synthetic magnetic field to maintain lateral force balance during migration.

[0027] Optionally, the device can be any one of a linear motor, a rotary radial motor, or an axial motor; when the device is an axial motor, the coil group is arranged in a staggered superposition along the circumference of the axial plane.

[0028] Compared with the prior art, the beneficial effects of the embodiments of this application are:

[0029] (1) Achieve continuous and smooth magnetic field migration and eliminate fluctuations: Through spatial partial overlap and timing control of "three stages", ensure that at least one set of coils is always conducting during the magnetic field migration process. This continuity guarantee mechanism solves the problem of intermittent magnetic field disconnection caused by frequent phase switching of traditional coils, eliminates magnetic field intensity fluctuations, and improves the stability of magnetic field operation.

[0030] (2) Maintaining the lateral force balance of the synthetic magnetic field: By staggering and superimposing more coil groups within a single coil group, the front and rear ends of each coil group form successively superimposed covering areas. By utilizing the superposition of magnetic fields in the front and rear covering areas, the synthetic magnetic field can maintain the lateral force balance during migration, solving the technical pain points of small force area and unstable magnetic field movement in traditional structures.

[0031] (3) Simplified directional control logic and improved energy efficiency: The tightly continuous coverage area and balanced magnetic field movement mechanism constructed in this scheme ensure that the center of the magnetic field remains balanced during directional movement. This greatly simplifies the control logic of magnetic field directional migration, and efficient migration can be achieved without complex vector control drive calculations, thereby significantly improving the energy utilization efficiency of the system.

[0032] (4) It has good scalability and applicability: By increasing the number of coil groups or the number of coils stacked within a group, the coverage of the continuous magnetic field can be flexibly expanded to form a long-distance moving magnetic field track. This method and device can be widely used in various scenarios that require directional moving magnetic fields, such as linear motors, rotary motors and magnetic levitation drives. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figures 1 to 3 A schematic diagram of the conduction timing control provided in an embodiment of this application is shown.

[0035] Figures 4 to 6 A schematic diagram of the stability enhancement design provided in an embodiment of this application is shown.

[0036] Figure 7 A schematic diagram of the two-coil superposition extended migration magnetic field method provided in an embodiment of this application is shown.

[0037] Figure 8 A schematic diagram of the multi-coil superposition extended migration magnetic field method provided in an embodiment of this application is shown.

[0038] Figure 9 This illustration shows a schematic diagram of the first magnetic field balance state of the control group formed by the misaligned superposition of three coils according to an embodiment of this application.

[0039] Figure 10 This illustration shows a second magnetic field balance state of the control group formed by the misaligned superposition of three coils according to an embodiment of this application.

[0040] Figure 11 This diagram illustrates the first conduction state of a linear motor with two coils misaligned and superimposed to form a control group, as provided in an embodiment of this application.

[0041] Figure 12 This illustration shows a schematic diagram of the second-step switching state of a linear motor that forms a control group by two coils being misaligned and superimposed, as provided in an embodiment of this application.

[0042] Figure 13 This diagram illustrates the third-step movement state of a linear motor forming a control group by two coils being misaligned and superimposed, as provided in an embodiment of this application. Detailed Implementation

[0043] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0044] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0047] The magnetic field migration mechanism utilizes a staggered superposition structure, where one or more sets of coils are staggered within a single set of coils, partially overlapping in space to form a continuous coverage area. The conduction timing control and stability enhancement design are as follows:

[0048] On-time control

[0049] Phase 1: The conducting coil group A is activated, generating a magnetic field 'a' covering the region of coil group A, such as... Figure 1 As shown;

[0050] Phase Two: The conducting coil group B is activated, generating a magnetic field a+b covering the region of coil groups A+B, as shown below. Figure 2 As shown;

[0051] Phase 3: Disconnect coil group A, and the magnetic field contracts to the magnetic field b in the region of coil group B, as shown below. Figure 3 As shown;

[0052] Migration continuity: The magnetic field is kept continuous by at least one set of coils to avoid interruption.

[0053] Stability Enhancement Design

[0054] When the number of coil groups is ≥3, ≥2 of the coil groups are continuously conducting.

[0055] When the conducting coil group A+B is turned on, it generates a+b magnetic field covering the region A+B, such as... Figure 4 As shown;

[0056] The conducting coil group A+B+C generates an a+b+c magnetic field covering the region A+B+C, such as... Figure 5 As shown;

[0057] When coil group A is disconnected, the magnetic field contracts to the B+C region. Two coil groups remain continuously conducting, ensuring that at least two coil groups are always conducting, thus expanding the stable magnetic field region. Figure 6 As shown.

[0058] The method of extending the migration magnetic field by superimposing two coils: Extending the two-coil superposition pattern, a second coil is superimposed to form a second set of magnetic field migration mechanisms. A third coil is then superimposed to form a third magnetic field migration mechanism. This process is repeated until the desired length of the magnetic field is achieved, such as... Figure 7 As shown.

[0059] Multi-coil superposition extended magnetic field migration method: This is an extension of the superposition mode of three or more coils. The following diagram illustrates the superposition of three coils. A fourth coil is then superimposed on the second coil, forming a magnetic field migration mechanism for the second coil group. Since the second coil already has the superposition of the third coil, only one more coil needs to be superimposed to achieve the superposition of three coils. Figure 8 As shown. Continue in this manner until the desired range of magnetic fields is achieved.

[0060] In other embodiments of this application, based on the aforementioned technical solutions, not only can smooth magnetic field migration be achieved, but other technical problems can also be solved. Specifically, while ensuring the continuity of the magnetic field, this application further solves the following technical pain points: the transverse force of the synthesized magnetic field in traditional coils is uneven, concentrated at the edge, and the force area is small, resulting in an unstable synthesized magnetic field when the magnetic field moves. At the same time, the movement of the magnetic field requires complex phase opening, closing, and forward and reverse control, which has problems such as difficulty in controlling the directional movement of the magnetic field, the need for complex vector control drive calculations, large magnetic field fluctuations, and low energy efficiency.

[0061] To this end, this application provides a step-by-step solution from "stability enhancement" to "lateral force balancing":

[0062] Stability enhancement mechanism (reference) Figure 4 , 5 6): When the number of coils N≥3, a multi-coil continuous conduction strategy is adopted (e.g., A+B+(N)+E). By always keeping at least two coils conducting, the stable magnetic field region is effectively expanded, the magnetic field abrupt change during single coil switching is avoided, and the magnetic field fluctuation problem is initially solved.

[0063] Lateral force balance and directional control optimization (reference) Figure 9 , 10Building upon this foundation, to further address the issues of uneven lateral force distribution and complex control, this scheme employs a deeper, staggered superposition structure. By spatially superimposing one or more coils within a single coil, a controlled coil assembly is formed, creating a large area for lateral force equilibrium and capable of synthesizing a balanced magnetic field during movement. Specifically, the front ends and rear ends of each coil are sequentially superimposed, thus forming a tightly continuous coverage area with a large lateral force equilibrium area and capable of synthesizing a balanced magnetic field during movement. For example... Figure 9 and Figure 10 As shown, this structure ensures that the center of the composite magnetic field remains balanced when the magnetic field moves to the right (or in a directional direction), achieving smooth and efficient directional migration without the need for complex vector calculations.

[0064] Implementation Method 1: Lateral Force Balance Control under Three-Coil Misalignment Superposition

[0065] When the three coil groups are stacked in a staggered manner to form a control group, the magnetic field migration process is as follows:

[0066] First, coils A and B are energized with current in the same direction, generating a combined magnetic field a+b that covers the region A+B in space.

[0067] Subsequently, coil A is disconnected in a controlled manner, and coil C is activated simultaneously with a current in the same direction, so that the synthesized magnetic field region is smoothly translated to the B+C region.

[0068] Combination Figure 9 When coils A, B, and C work together, the resultant force at their front ends is to the left and the resultant force at their rear ends is to the right, thus achieving symmetry in the longitudinal distribution of the magnetic field.

[0069] refer to Figure 10 When the system state switches to the point where coils B, C, and D are conducting, the magnetic field center is shifted to the right while maintaining the balance of the lateral forces at both ends by disconnecting A and turning on D.

[0070] Implementation Method 2

[0071] The conduction timing control and stability enhancement design are as follows:

[0072] The two coils are misaligned and superimposed to form a magnetic field movement and conduction timing control.

[0073] Phase 1: Conducting coil A generates a magnetic field a covering the region of coil A, such as... Figure 1 As shown;

[0074] Phase Two: Conducting coil B generates a magnetic field a+b covering the region of coils A+B, as shown below. Figure 2 As shown;

[0075] Phase 3: Disconnect coil A; the magnetic field contracts to the magnetic field b in the region of coil B, as shown below. Figure 3 As shown;

[0076] Migration continuity: The magnetic field is kept continuous by at least one set of coils to avoid interruption.

[0077] During this process, the continuous conduction of at least one set of coils ensures that the magnetic field is not interrupted during the migration, thus guaranteeing the continuity of the migration.

[0078] Implementation Method 3

[0079] Stability Enhancement Design

[0080] To meet the requirements of high stability, when the number of coils is ≥3, ≥2 of them are continuously conducting; such as A+B+(N)+E;

[0081] First, the conducting coil A+B+(N) is turned on, generating an a+b+(N) magnetic field covering the region A+B+(N), such as... Figure 4 As shown;

[0082] Subsequently, the conducting coil A+B+(N)+E (the last coil) is turned on, generating a magnetic field a+b+(n)+e (the last coil) covering the region of A+B+(N)+E (the last coil), such as Figure 5 As shown;

[0083] Finally, disconnect coil A, causing the magnetic field to contract to the region B+(N)+E (the last coil). Maintaining at least two coils conducting throughout expands the effective area of ​​the stable magnetic field region and eliminates magnetic field strength fluctuations caused by single-coil switching. Figure 6 As shown.

[0084] Implementation Method 4

[0085] The method of extending the migration magnetic field by superimposing two coils: This method extends the two-coil superposition pattern by adding another coil within the second coil to form the magnetic field migration mechanism of the second coil. A third coil is then added to form the magnetic field migration mechanism of the third coil, and so on. By repeatedly superimposing coil groups in space, a long-range migrating magnetic field track covering a predetermined length range can be formed, such as... Figure 7 As shown.

[0086] Implementation Method 5

[0087] Multi-coil superposition extended magnetic field migration method: This is an extension of the superposition mode of three or more coils. The following example demonstrates the superposition of three coils. A fourth coil is superimposed on the second coil, forming the magnetic field migration mechanism of the second coil. Since the second coil already has the superposition of the third coil, only one more coil needs to be superimposed to form the magnetic field migration mechanism of the second coil. Similarly, a fifth coil is superimposed on the third coil, forming the magnetic field migration mechanism of the third coil. Again, since the third coil already has the superposition of the fourth coil, only one more coil needs to be superimposed to form the magnetic field migration mechanism of the second coil. (Example...) Figure 8 As shown. And so on, until the required range of magnetic field is reached, through this high-density spatial overlapping arrangement, each coil group is in the envelope of multiple magnetic fields, thereby maintaining extremely high magnetic field stiffness and smoothness over extremely long distances.

[0088] Implementation Method Six

[0089] Application of two coils overlapping in a staggered manner to form a straight line for the control group:

[0090] Step 1: With the conducting coil AB turned on, the magnetic field is located at position AB, such as... Figure 11 .

[0091] Step 2: Disconnect coil A and simultaneously connect coil C. The magnetic field will move from position AB to position BC. Figure 12 .

[0092] Step 3: Disconnect coil B while simultaneously connecting coil D. The magnetic field will move from position BC to position CD. Figure 13 .

[0093] The above-described sequential on / off logic allows the magnetic field to move smoothly and continuously to the designated position. This principle also applies to radial and axial motors, driving the rotor to operate continuously through the smooth movement of the magnetic field in a circumferential or axial plane.

[0094] Implementation Method 7: Case Study of 4-Coil Half-Pole Gap Enhancement

[0095] When four coils are stacked in a staggered manner, the half-pole pitch increases to the area of ​​four slots. For example, when the coil generates the N pole, the rotor's s pole half-pole pitch is at the same position as the coil's half-pole pitch, and the two attract each other, with the attraction stroke reaching the position of four slots.

[0096] Smooth, directional rotor movement can be generated by switching magnetic fields at any point along this travel distance, achieving enhanced magnetic force while making the direction of movement easy to control.

[0097] In summary, this application addresses the technical pain points of traditional coil-synthesized magnetic fields, which heavily rely on phase switching and forward / reverse control during movement, leading to high complexity in magnetic field directional movement control, large magnetic field fluctuations, and low energy efficiency. This invention proposes a solution based on the staggered superposition of multiple coils. By staggered superposition of one or more coil groups within a single coil group, forming a partially overlapping arrangement in space, a synthetic magnetic field region with a large area of ​​lateral force balance and high density and continuous coverage is constructed. This solution utilizes an uninterrupted balanced magnetic field movement mechanism, which not only simplifies the control logic for magnetic field directional migration and achieves a smooth transition of the magnetic field, but also significantly improves the system's magnetic field stability and energy utilization efficiency.

[0098] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A magnetic field migration method based on misaligned superimposed coils, characterized in that, include: Spatial arrangement structure: Two sets of coils are partially overlapped in space to form a continuously covered magnetic field region; Timing control module: Perform the following operations according to its configuration: First stage: Turn on coil group A to generate a magnetic field a covering region A; Second stage: Turn on coil group B to generate magnetic field b covering region B; extend the magnetic field covering region B from a to b. Third stage: Disconnect coil group A, leave coil group B conducting, so that the magnetic field contracts to region b; Continuity guarantee mechanism: During the migration process, at least one set of coils is always kept on.

2. The system according to claim 1, characterized in that, When there are more than 2 overlapping coils in a group of coils, let's call it N. When N > 2, the coils in the direction of magnetic field migration are continuously conducting. During the magnetic field migration process, the coils located in the direction of magnetic field migration remain conducting during the switching phase. That is, in the case of overlapping from the Nth coil upwards, the coils in group N-1 remain continuously conducting.

3. The system according to claim 1 or 2, characterized in that, Magnetic field range can be expanded: the magnetic field range can be expanded by increasing the number of coil groups and the number of coils stacked within a group. Each coil group contains at least one stacked coil. The continuous magnetic field coverage area between adjacent coil groups can be expanded by increasing the number of overlapping coils. Example: For the sequentially arranged overlapping coil groups A, B, and C, the control flow includes: The conducting coil group A+B is activated; a magnetic field is generated covering areas a and b. The conducting coil group A+B+C generates a magnetic field covering regions a, b, and c; And disconnect coil group A, so that the magnetic field contracts to regions b and c, in which two groups of coils remain conducting.

4. The method according to claim 1, characterized in that, The spatial arrangement structure further includes: one or more coil groups are staggered and superimposed within a single coil group, with the front ends of each coil group stacked sequentially to form a front end coverage area, and the rear ends of each coil group stacked sequentially to form a rear end coverage area; the magnetic fields of the front end coverage area and the rear end coverage area are superimposed to maintain lateral force balance of the synthesized magnetic field during migration.

5. The method according to claim 4, characterized in that, When the three coil groups form a control group in a staggered superposition manner, the timing control module executes: Step 1: The first and second coil groups are energized with current in the same direction to generate the first combined magnetic field; Step 2: The first coil group is disconnected in a controlled manner, and the third coil group is activated simultaneously with a current in the same direction, so that the combined magnetic field is smoothly translated from the first combined magnetic field to the second combined magnetic field; during the period when the first to third coil groups work together, the direction of the resultant force at the front end is opposite to the direction of the resultant force at the rear end, so as to achieve a symmetrical balance in the longitudinal distribution of the magnetic field.

6. The method according to claim 1, characterized in that, The arrangement of the two sets of coils in partially overlapping space includes: continuing to superimpose a third coil set within the second coil set, and continuing to superimpose a fourth coil set within the third coil set, and so on, forming a continuously moving magnetic field track by repeatedly cascading and superimposing coil sets in linear, circular, or axial space.

7. The method according to claim 4, characterized in that, In the aforementioned staggered superposition structure, when the number of coil groups is 4: the equivalent half-pole pitch of the synthetic magnetic field increases to the area of ​​4 slots; the rotor magnetic poles switch magnetic fields within the travel span of the area of ​​the 4 slots to enhance the magnetic field driving force.

8. A magnetic field migration device based on misaligned superimposed coils, characterized in that, include: A coil assembly includes multiple coil groups arranged in a staggered superposition manner, wherein the coil groups partially overlap in space to form a continuously covering magnetic field region. A control module, connected to the coil assembly, is used to control the switching on and off of each of the coil groups according to the method of any one of claims 1-7, so that the synthetic magnetic field generated by the coil assembly migrates smoothly in a preset direction; wherein, the structure of the coil assembly enables the synthetic magnetic field to maintain lateral force balance during migration.

9. The apparatus according to claim 8, characterized in that: The device is any one of a linear motor, a rotary radial motor, or an axial motor.

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