High-efficiency magnetic circuit linear motor

Abstract

The invention discloses an efficient magnetic circuit linear motor. An E-shaped iron core is composed of two iron core end portions and an iron core middle portion. The lengths and the widths of the iron core middle part and the iron core end parts on the two sides are designed in a differentiated manner; a narrowing structure design is adopted in the width direction of the middle part of the iron core; and a winding coil is nested in the middle of the iron core. An asymmetric structure is formed through the differentiated design of the length and width sizes of the iron core middle part and the iron core end parts on the two sides, so that an iron core magnetic circuit is converted into a three-dimensional magnetic circuit from a two-dimensional magnetic circuit; the magnetic flux is dispersed, the problem of overlarge flux density of the middle tooth part in the traditional design is solved, and the motor efficiency and the swinging torque are not reduced; the structural design that the winding coil does not protrude in the width direction is achieved; the total width size of the motor can be effectively controlled, so that the motor can better adapt to precise use scene requirements; and efficient conversion of electromagnetic force is realized in an effective space to the greatest extent.

Description

Technical Field

[0001] The invention belongs to the technical field of linear motors and relates to a high-efficiency magnetic line linear motor. Background Art

[0002] Linear motors are widely used in various devices requiring linear or oscillating motion due to their direct linear motion, fast response, and high precision. The trend toward smaller and thinner devices is placing stricter requirements on the overall dimensions (particularly width) of linear motors.

[0003] In the stator core structure of existing linear motors, the winding is usually wound around the core teeth. In miniaturization design, if the winding size is kept to ensure performance, the winding is likely to exceed the overall width of the motor (such as Figure 5 As shown in the figure, the total width of the motor is too large, which cannot meet the requirements of thinning the equipment. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A high-efficiency magnetic linear motor comprises: a swing bracket and a yaw arm bracket arranged on the swing bracket; a stator group is arranged on the swing bracket, and a mover group is arranged on the yaw arm bracket; the stator group cooperates with the stator group to realize the swinging operation of the yaw arm bracket;

[0006] The stator assembly includes: an E-shaped iron core disposed in a bracket base, the E-shaped iron core consisting of two iron core ends and a middle iron core portion, the middle iron core portion being connected to the tail ends of the iron core ends to form an iron core magnetic circuit;

[0007] The length and width of the core center and the ends are designed differently, forming an asymmetric structure, which transforms the core magnetic circuit from a two-dimensional magnetic circuit to a three-dimensional magnetic circuit. The width of the core center is narrowed, forming a coil arrangement slot between the core center and the bottom of the core.

[0008] A winding coil is nested in the middle of the iron core; and the outer contour of the winding coil in the width direction is arranged in the coil arrangement slot so that it is flush with or lower than the end face of the bracket base, realizing a structural design in which the winding coil has no width-direction protrusion.

[0009] As a further solution of the present invention: the length of the middle portion of the core is greater than the length of the ends of the core on both sides, and the width of the middle portion of the core is smaller than the width of the ends of the core on both sides.

[0010] As a further solution of the present invention: the width of the coil arrangement slot is adapted to the width of the winding coil, and the slot depth is not less than the thickness of the winding coil.

[0011] The beneficial effects of the present invention are as follows: through the differentiated design of the length and width dimensions of the middle part of the iron core and the ends of the iron core on both sides, an asymmetric structure is formed, so that the iron core magnetic circuit is transformed from a two-dimensional magnetic circuit to a three-dimensional magnetic circuit; the magnetic flux is dispersed, which solves the problem of excessive magnetic density in the middle tooth part in the traditional design, and ensures that the motor efficiency and swing torque are not reduced; and the width direction of the middle part of the iron core adopts a narrowing structure design to realize a structural design without protrusion in the width direction of the winding coil; it can effectively control the total width size of the motor, so that it can be more adapted to the needs of sophisticated usage scenarios; and the efficient conversion of electromagnetic force is achieved in the effective space to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention.

[0013] Figure 2 It is a structural diagram of the stator group and the mover group in the present invention.

[0014] Figure 3 It is a schematic diagram of the E-type iron core structure of the present invention.

[0015] Figure 4 It is a schematic diagram of the swing bracket structure in the present invention.

[0016] Figure 5 It is a schematic diagram of the prior art structure. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. It should be understood that this application is not limited to the example embodiments disclosed herein. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0018] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0019] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0020] In the embodiments of the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The present invention provides, please refer to Figures 1 to 4 , in the embodiments of the present invention, a high-efficiency magnetic circuit linear motor, comprising: a swing bracket 2 and a stator group 1 and a rotor group 3 installed in the swing bracket 2;

[0022] The main body of the swing bracket 2 is a "U"-shaped structural bracket base 22, and a mounting position 23 for installing the stator group 1 is provided at the central position of the bracket base 22; two groups of parallelly arranged yaw arm brackets 21 are provided at the upper end of the mounting position 23, and both ends of the yaw arm brackets 21 are elastically connected to the swing bracket 2, and the rotor group 3 is installed on the yaw arm brackets 21;

[0023] The stator group 1 includes: an E-shaped iron core 12 disposed in the mounting position 23, and the E-shaped iron core 12 is composed of two iron core ends 121 and an iron core middle part 122, and the iron core middle part 122 is connected to the tail ends of the iron core ends 121 to form an iron core magnetic circuit;

[0024] A winding coil 11 is nested on the iron core middle part 122. When the winding coil 11 is powered on, the magnetic field generated by the winding coil 11 can be conducted from the iron core middle part 122 to the two iron core ends 121 of the E-shaped iron core 12 through the iron core magnetic circuit; due to the magnetic circuit closure, the magnetic poles of the iron core middle part 122 are opposite to the magnetic poles of the two iron core ends 121 on both sides;

[0025] The rotor group 3 includes: two groups of swing bars 31 (the swing bars 31 are arranged along the length direction of the yaw arm brackets 21) installed on the lower end surfaces of the yaw arm brackets 21, and a magnetized magnetic sheet 32 is disposed at the lower end of the swing bars 31 close to the E-shaped iron core 12; and the magnetized directions of the magnetized magnetic sheets 32 on the two groups of swing bars 31 are opposite;

[0026] Therefore, under this structural arrangement, the armature magnetic field of the core middle portion 122 and the two core ends 121 of the E-shaped core 12 interacts synchronously with the excitation magnetic field of the magnetized magnetic sheet 32;

[0027] Taking a certain instant as an example, when the two core ends 121 of the E-type core 12 are the N poles of the armature reaction, the middle part 122 of the core is the S pole;

[0028] When the left side of the first set of magnetized magnetic pieces 32 is the S pole and the right side is the N pole, at that moment, according to the principle of magnetic poles attracting and repelling each other, the magnetized magnetic piece 32 (swing bar 31) will move to the left, while the other set of magnetized magnetic pieces 32 will move to the opposite right side because of its magnetization direction. When the N-S poles of the E-shaped iron core 12 switch, the two sets of magnetized magnetic pieces 32 will move to the other side.

[0029] The swing member that performs outward output is mounted on the yaw arm 21 , and the yaw arm 21 is driven to swing left and right by two sets of swing bars 31 , thereby driving the swing member set to achieve power output.

[0030] In the above embodiment, the magnetic pole changes of the core end 121 and the core middle 122 in the E-type core 12 are determined according to the positive and negative circuits of the input winding coil 11; the swing amplitude of the swing bar 31 is determined according to the frequency of the current input; the torque of the swing bar 31 is determined according to the magnitude of the input current. Therefore, in actual use, the staff implements work adjustment according to the above principles to achieve the required technical effect.

[0031] Furthermore, the length and width dimensions of the core middle portion 122 and the core ends 121 on both sides are designed differently, forming an asymmetric structure, which transforms the core magnetic circuit from a two-dimensional magnetic circuit into a three-dimensional magnetic circuit. This disperses the magnetic flux, solving the problem of excessive magnetic density in the middle teeth in traditional designs, and ensures that the motor efficiency and swing torque are not reduced. The width direction of the core middle portion 122 (the length direction of the core ends 121 on both sides) is narrowed, forming a coil arrangement slot 123 between the core middle portion 122 and the bottom of the core.

[0032] The outer contour of the winding coil 11 in the width direction is arranged in the coil arrangement groove 123, so that it is flush with or lower than the end face of the bracket base 22, realizing a structural design in which the winding coil 11 has no protrusion in the width direction; it can effectively control the total width size of the motor, making it more adaptable to the requirements of sophisticated usage scenarios.

[0033] Furthermore, the length of the middle portion 122 of the core is greater than the length of the ends 121 of the core on both sides, and the width of the middle portion 122 of the core is less than the width of the ends 121 of the core on both sides; while realizing the asymmetric structure of the E-type core 12, the extended middle portion 122 of the core is used to provide more sufficient flow space for the magnetic field; effectively avoiding the magnetic circuit saturation phenomenon, and ensuring that the electromagnetic conversion efficiency of the motor will not be reduced.

[0034] Furthermore, the width of the coil arrangement slot 123 matches the width of the winding coil 11 , and the slot depth is not less than the thickness of the winding coil 11 , so that the winding coil 11 can be accommodated in the installation position 23 of the bracket base 22 .

[0035] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0036] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-efficiency magnetic linear motor, characterized in that: The invention comprises: a swing bracket and a yaw arm bracket arranged on the swing bracket; a stator group is arranged on the swing bracket, and a mover group is arranged on the yaw arm bracket; The swinging of the yaw arm is realized by cooperating with the stator group; The stator assembly includes: an E-shaped iron core disposed in a bracket base, the E-shaped iron core consisting of two iron core ends and a middle iron core portion, the middle iron core portion being connected to the tail ends of the iron core ends to form an iron core magnetic circuit; The length and width of the core center and the ends are designed differently, forming an asymmetric structure, which transforms the core magnetic circuit from a two-dimensional magnetic circuit to a three-dimensional magnetic circuit. The width of the core center is narrowed, forming a coil arrangement slot between the core center and the bottom of the core. A winding coil is nested in the middle of the iron core; and the outer contour of the winding coil in the width direction is arranged in the coil arrangement slot so that it is flush with or lower than the end face of the bracket base, realizing a structural design in which the winding coil has no width-direction protrusion.

2. A high-efficiency magnetic linear motor according to claim 1, characterized in that: The length of the middle portion of the iron core is greater than the length of the ends of the iron core on both sides, and the width of the middle portion of the iron core is smaller than the width of the ends of the iron core on both sides.

3. A high-efficiency magnetic linear motor according to claim 1, characterized in that: The width of the coil arrangement slot is adapted to the width of the winding coil, and the slot depth is not less than the thickness of the winding coil.

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