Annular winding polyhedral linear-rotary motor

Abstract

The invention provides an annular winding polyhedral linear-rotary motor, which is characterized in that a rotor of a linear motor unit is arranged on the outer side, a stator of the linear motor unit, a magnetic isolation ring and a stator of a rotary motor unit are sequentially arranged in the middle, a rotor of the rotary motor unit is arranged on the inner side, and motion decoupling of the linear motor unit and the rotary motor unit is realized through the structure; the linear power generation unit is of a homodromous annular winding-polyhedral permanent magnet linear motor structure, permanent magnets are magnetized in a sheet shape in parallel, assembly is easy, the manufacturing cost is low, and the influence of segmented magnetizing on the performance of the motor is eliminated. When the system is applied to the field of power generation, the rotary power generation unit is arranged inside and the linear power generation unit is arranged outside, so that power balance is facilitated, and a foundation is laid for complementary control of wind and wave combined power generation after networking.

Description

Technical Field

[0001] The present invention relates to a linear-rotary motor, and more specifically, to a polyhedron linear-rotary motor with a toroidal winding. Background Art

[0002] The linear-rotary two-degree-of-freedom motor is an innovative energy conversion device that breaks through the limitation of the single motion mode of traditional motors and can simultaneously or independently achieve the energy harvesting of linear reciprocating and rotational motions. Its core structure adopts a composite magnetic circuit or a double-stator design, and directly converts mechanical energy into electrical energy through magnetic field coupling. For example, linear motion cuts the radial magnetic field, and rotational motion cuts the axial magnetic field. This technology significantly improves the capture efficiency of environmental kinetic energy (such as ocean wave undulations and wind vortices), and is especially suitable for multi-directional irregular energy scenarios. Its compact design combines high power density and dynamic response characteristics, and has application potential in the fields of ocean energy power generation, hybrid power systems, and micro-energy harvesting, providing an efficient solution for distributed power generation.

[0003] However, since the linear-rotary two-degree-of-freedom motor needs to achieve double-degree-of-freedom coupled motion, its internal structure is compact, heat generation is concentrated in electromagnetic components (such as coils and permanent magnets) and mechanical friction areas, and the moving components have poor adaptability to traditional heat dissipation structures (such as fixed fins or air cooling). When applied to the generator field, in the patent with the publication number CN113037038A and the invention name of a two-degree-of-freedom double-stator permanent magnet generator, the rotary generator unit and the linear generator unit share the same mover, the motor structure is compact, and the integration degree is high; the permanent magnets and windings are both arranged on the stator, which is convenient for heat dissipation. There are no windings and permanent magnets on the mover structure, which is suitable for the strong earthquake environment of the wave power generation system, and the generator structure is strong and reliable.

[0004] However, the traditional cylindrical permanent magnet linear generator structure adopts toroidal radially magnetized permanent magnets. Due to the complex magnetization process, the toroidal magnets are usually magnetized in segments. However, the magnetic field distribution of the magnetized permanent magnets after segmentation has a certain difference from the magnetic field distribution during motor design, and this difference cannot be eliminated, thus affecting the motor performance. And in the above scheme, the rotary power generation unit is outside and the linear power generation unit is inside; considering that the wind speed at sea is high and the wave energy speed is low, the spatio-temporal distribution of wind energy and wave energy resources does not match, resulting in a significant difference in the input energy of the two degrees of freedom and power imbalance; and due to the shared transmission shaft, there is mechanical coupling, and the overload torque of wind power generation may inhibit the motion freedom of the wave energy conversion mechanism, further reducing the wave energy capture efficiency.

[0005] In order to solve the above existing problems, people have been seeking an ideal technical solution. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art, and thus provide an annular winding polyhedron linear-rotary motor, which is convenient for magnetizing permanent magnets and can reduce the power imbalance between the linear motor unit and the rotary motor unit.

[0007] To achieve the above object, the technical solution adopted by the present invention is: an annular winding polyhedron linear-rotary motor, comprising: a mover I, a stator I, a magnetic isolation ring, a stator II, and a mover II, which are arranged in sequence from outside to inside; wherein, the mover I includes a polyhedron mover iron core and a co-directional annular winding arranged on the inner surface of the polyhedron mover iron core along the axial direction; the stator I includes a polyhedron stator iron core and a magnet I arranged on the outer surface of the polyhedron stator iron core along the axial direction; the mover II includes a cylindrical mover iron core and a magnet II arranged on the outer surface of the circular mover iron core along the circumferential direction; the stator II includes a stator iron core and an armature winding arranged on the inner surface of the stator iron core along the circumferential direction.

[0008] In the present invention, the mover on the outer side is the linear motor unit, the stator of the linear motor unit, the magnetic isolation ring, and the stator of the rotary motor unit are arranged in sequence in the middle, and the mover on the inner side is the rotary motor unit. Through the above structure, the separation of the linear motor unit and the rotary motor unit is realized, and the motion decoupling of the linear motor unit and the rotary motor unit is realized by means of an independent transmission chain.

[0009] Furthermore, the linear power generation unit is a co-directional annular winding-polyhedron permanent magnet linear motor structure, and the permanent magnet is magnetized in parallel in a sheet shape, which is simple to assemble and low in cost, and eliminates the influence of segmented magnetization on the motor performance.

[0010] When applied to the power generation field, the inertia burdens of the linear power generation unit and the rotary power generation unit in the combined wind and wave power generation system are eliminated. Furthermore, the sea wind speed is relatively high, but the wave energy speed is relatively low. The rotary power generation unit of this generator is used for wind power generation inside, and the linear power generation unit is used for wave energy power generation outside. The linear generator unit has a larger iron core volume than the rotary generator unit, which is beneficial to power balance and lays a foundation for the complementary control of combined wind and wave power generation after connecting to the grid. Description of the Drawings

[0011] Figure 1 is a schematic diagram of the overall structure of the annular winding tetrahedron linear-rotary motor described in Embodiment 1.

[0012] Figure 2 is a schematic cross-sectional structure diagram of the annular winding tetrahedron linear-rotary motor described in Embodiment 1.

[0013] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the AA section of the annular winding tetrahedron linear-rotary motor.

[0014] Figure 4 It is a schematic diagram of the three-dimensional structure of the AA section of the linear generator unit of the annular winding tetrahedron linear-rotary motor described in Example 1.

[0015] Figure 5 This is the overall structure of the rotating generator unit of the annular winding tetrahedron linear-rotary motor described in Example 1.

[0016] Figure 6 It is the overall structure of the common stator of the annular winding tetrahedron linear-rotary motor described in Example 1.

[0017] Figure 7 It is the overall structure of the magnetic isolation ring of the annular winding tetrahedron linear-rotary motor described in Example 1.

[0018] Figure 8 It is a schematic diagram of the cross-sectional structure of the annular winding hexahedral linear-rotary motor described in Example 2.

[0019] Figure 9 yes Figure 5 A schematic diagram of the three-dimensional structure of the AA section of the annular winding hexahedral linear-rotary motor.

[0020] Figure 10 This is the overall structure of the linear generator unit of the annular winding hexahedral linear-rotary motor described in Example 2.

[0021] Figure 11 This is the overall structure of the rotating generator unit of the annular winding hexahedral linear-rotary motor described in Example 2.

[0022] In the figure: 1. mover core Ⅰ; 2. same-direction annular winding; 3. magnet Ⅰ; 4. stator core Ⅰ; 5. magnetic isolation ring; 6. stator core Ⅱ; 7. armature winding; 8. magnet Ⅱ; 9. mover core Ⅱ. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0024] Example 1 This embodiment provides a toroidal winding tetrahedron linear-rotary motor, such as Figures 1-7 As shown, it includes: a mover I, a stator I, a magnetic isolation ring 5, a stator II and a mover II which are arranged in sequence from the outside to the inside.

[0025] The mover I includes a mover iron core I1 with a tetrahedral cross-section and a co-directional annular winding 2 arranged along the axial direction on the inner surface of the tetrahedral mover iron core I1. Specifically, the co-directional annular windings form m 1 phase windings, and each phase winding is connected in series. It can be understood that the mover iron core I1 is laminated from silicon steel sheets.

[0026] Specifically, a number of annular stator slots are axially parallelly opened on the inner surface of the mover iron core I1, and a co-directional annular winding 2 is installed in each annular stator slot.

[0027] In another embodiment, the tetrahedral mover iron core includes four flat mover units. A number of rectangular winding slots are arranged along the axial direction on the inner surface of the flat mover units corresponding to the co-directional annular windings. Four rectangular winding slots in the same longitudinal section form an annular stator slot to install the co-directional annular winding 2.

[0028] The stator I includes a stator core Ⅰ 4 with a tetrahedral cross-section and magnetic poles I 3 arranged along the axial direction on the outer surface of the stator core Ⅰ 4. Specifically, the magnetic poles I 3 are sheet-shaped radially magnetized permanent magnets with parallel magnetization. The magnetic poles of adjacent two permanent magnets are opposite, that is, they are arranged alternately with N poles and S poles, and the magnetization direction of each radial permanent magnet is the radial direction. In this embodiment, taking the co-directional annular windings forming 3-phase windings as an example, the stator core Ⅰ 4 has a total of 21 magnetic poles I 3.

[0029] Specifically, the magnetic poles I 3 are arranged and pasted along the axial direction on each outer surface of the mover iron core I1.

[0030] It can be understood that compared with the traditional cylindrical permanent magnet linear generator structure with segmented magnetization of the annular magnet, in this application, sheet-shaped radially magnetized permanent magnets with parallel magnetization are used, which are simple to assemble and low in cost, and eliminate the influence of segmented magnetization on the performance of the motor.

[0031] It can be understood that the mover I and the stator I form a linear motor unit. When in use, m 1 phase alternating current is passed through the co-directional annular windings, thereby generating an axial armature magnetic field; the armature magnetic field interacts with the permanent magnetic field to generate an axial electromagnetic force, thereby pushing the mover to move linearly along the stator I.

[0032] The mover II includes a cylindrical mover core II 9 and magnetic poles II 8 arranged circumferentially on the outer surface of the cylindrical mover core II 9; specifically, the magnetic poles II 8 are axial permanent magnets, and the magnetic poles of two adjacent magnetic poles II 8 are opposite, that is, arranged alternately with N poles and S poles, and the magnetization direction of each axial permanent magnet is the axial direction. Specifically, the magnetic poles II are arranged and pasted on the outer surface of the cylindrical mover core along the circumferential direction.

[0033] The stator II includes a stator core II 6 and an armature winding 7 arranged circumferentially on the inner surface of the stator core II 6.

[0034] Specifically, a plurality of axial stator slots are parallelly arranged along the circumferential direction on the inner surface of the stator core II 6, and an armature winding 7 is installed in each axial stator slot.

[0035] In an embodiment, the stator core II 6 is a 12-slot 10-pole stator core, and two adjacent armature windings are connected in series in reverse as a winding of one phase. Correspondingly, the number of the magnetic poles II is 10.

[0036] It can be understood that the mover core II 9 is laminated by silicon steel sheets.

[0037] It can be understood that the mover II and the stator II form a rotating motor unit. When in use, three-phase alternating current is passed through the armature winding 7, thereby generating a radial armature magnetic field; the armature magnetic field interacts with the permanent magnetic field, generating a radial electromagnetic force, thereby driving the mover II to rotate relative to the stator II.

[0038] Specifically, the number of the magnetic poles I and the magnetic poles II, and the setting of the three-phase electricity in the co-directional ring winding and the armature winding 7 are all common technologies, and will not be elaborated in detail here.

[0039] It can be seen that in the present invention, the mover of the linear motor unit is on the outside, the stator of the linear motor unit, the magnetic isolation ring, and the stator of the rotating motor unit are arranged in sequence in the middle, and the mover of the rotating motor unit is on the inside. It can be seen that the linear motor unit and the rotating motor unit do not share a mover, that is, there is no mechanical coupling; further, a magnetic isolation ring 5 is arranged between the stator of the linear motor unit and the stator of the rotating motor unit. The setting of the magnetic isolation ring 5 can prevent the magnetic circuits of the two stators of the linear motor unit and the rotating motor unit from being coupled and having an adverse effect on the operation of the motor, thereby forming two motor units with magnetically isolated magnetic circuits. Through the above structure, the separation of the linear motor unit and the rotating motor unit is realized, and further the motion decoupling of the linear motor unit and the rotating motor unit is realized.

[0040] Specifically, when applied to the power generation field, the linear motor unit and the rotary motor unit are decoupled in motion, eliminating the respective inertia burdens of the linear power generation unit and the rotary power generation unit in the combined wind and wave power generation system, and facilitating the improvement of the wave energy capture efficiency.

[0041] Furthermore, the offshore wind speed is relatively high, but the wave energy speed is relatively low. The rotary power generation unit is used for wind power generation inside, and the linear power generation unit is used for wave energy power generation outside. The linear generator unit has a larger core volume compared to the rotary generator unit, which is beneficial for power balance and lays a foundation for the complementary control of combined wind and wave power generation after connecting to the grid.

[0042] Embodiment 2 The difference between this embodiment and Embodiment 1 is that the stator core I of the stator I and the stator core II of the stator II are the same stator core. The stator core is a tetrahedral stator core. The outer surface of the tetrahedral stator core is arranged with magnetic poles I 3 along the axial direction. The inner surface of the tetrahedral stator core is arranged with armature windings 7 along the circumferential direction. A magnetic isolation ring 5 is arranged between the magnetic poles I 3 and the armature windings 7.

[0043] It can be understood that in this application, the rotary motor unit and the linear motor unit share the same stator, and the motor structure is compact with high integration.

[0044] Embodiment 3 The difference between this embodiment and Embodiment 1 is as follows Figures 8-11 As shown, this embodiment provides a toroidal winding hexahedral linear-rotary motor.

[0045] Specifically, the mover I includes a mover core I1 with a hexahedral cross-section and co-directional toroidal windings 2 arranged along the inner surface of the hexahedral mover core I1 in the axial direction.

[0046] Specifically, a number of toroidal stator slots are axially and parallelly opened on the inner surface of the mover core I1, and each toroidal stator slot is installed with a co-directional toroidal winding 2.

[0047] In another embodiment, the tetrahedral mover core includes six flat mover units. A number of rectangular winding slots are arranged on the inner surface of the flat mover units corresponding to the co-directional toroidal windings in the axial direction. The six rectangular winding slots in the same longitudinal section form a toroidal stator slot to install the co-directional toroidal windings 2.

[0048] The stator I includes a stator core I 4 with a hexahedron cross-section and magnetic poles I 3 arranged along the axial direction on the outer surface of the stator core I 4. Specifically, the magnetic poles I 3 are sheet-shaped radially magnetized permanent magnets with parallel magnetization. The magnetic poles of two adjacent permanent magnets are opposite, i.e., arranged alternately as N poles and S poles, and the magnetization direction of each radial permanent magnet is the radial direction.

[0049] Specifically, the magnetic poles I 3 are arranged and pasted along the axial direction on each outer surface of the mover core I1.

[0050] It can be understood that compared with the structure of a traditional cylindrical permanent magnet linear generator that magnetizes the annular magnet in segments, in this application, sheet-shaped radially magnetized permanent magnets are used, which are simple to assemble and low in cost, and eliminate the influence of segmented magnetization on the performance of the motor.

[0051] It can be understood that the mover I and the stator I form a linear generator unit. During use, three-phase alternating current is passed through the co-directional annular winding, thereby generating an axial armature magnetic field; the armature magnetic field interacts with the permanent magnetic field, generating an axial electromagnetic force, thereby pushing the mover to move linearly along the stator I.

[0052] The mover II includes a cylindrical mover core II 9 and magnetic poles II 8 arranged along the circumferential direction on the outer surface of the cylindrical mover core II 9; specifically, the magnetic poles II 8 are axial permanent magnets, and the magnetic poles of two adjacent magnetic poles II 8 are opposite, i.e., arranged alternately as N poles and S poles, and the magnetization direction of each axial permanent magnet is the axial direction. Specifically, the magnetic poles II are arranged and pasted along the circumferential direction on the outer surface of the cylindrical mover core.

[0053] The stator II includes a stator core II 6 and an armature winding 7 arranged along the circumferential direction on the inner surface of the stator core II 6.

[0054] Specifically, a number of axial stator slots are parallelly opened along the circumferential direction on the inner surface of the stator core II 6, and an armature winding 7 is installed in each axial stator slot.

[0055] It can be understood that the mover II and the stator II form a rotating generator unit. During use, three-phase alternating current is passed through the armature winding 7, thereby generating a radial armature magnetic field; the armature magnetic field interacts with the permanent magnetic field, generating a radial electromagnetic force, thereby pushing the mover II to perform a rotational motion relative to the stator II.

[0056] Specifically, the number of the magnetic poles I and the magnetic poles II, as well as the settings of the three-phase electricity in the co-directional annular winding and the armature winding 7, are all common technologies and will not be elaborated in detail here.

[0057] It can be seen that, similar to the embodiments, in the present invention, the outer side is the mover of the linear motor unit, the middle is successively the stator of the linear motor unit and the stator of the rotary motor unit, and the inner side is the mover of the rotary motor unit. Among them, a magnetic isolation ring 5 is provided between the stator of the linear motor unit and the stator of the rotary motor unit. The setting of the magnetic isolation ring 5 can prevent the magnetic circuits of the two stators of the linear motor unit and the rotary motor unit from being coupled, which has an adverse effect on the operation of the motor, thereby forming two generator units with magnetically isolated magnetic circuits, that is, the motion decoupling of the linear motor unit and the rotary motor unit is achieved through the above structure.

[0058] It should be further noted that the ring-wound polyhedral linear-rotary motor is not limited to the tetrahedral structure described in Embodiment 1, nor is it limited to the hexahedral structure described in Embodiment 3. For example, an octahedron, etc. are also possible.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered by the scope of the technical solutions claimed in the present invention.

Claims

1. A toroidal winding polyhedral linear-rotary motor, characterized in that: include: The mover I, stator I, magnetic isolation ring, stator II and mover II are arranged in sequence from outside to inside; Wherein, the mover I comprises a polyhedral mover core and a same-direction annular winding arranged along the axial direction on the inner surface of the polyhedral mover core; The stator 1 includes a polyhedral stator core and magnets 1 arranged along the axial direction on the outer surface of the polyhedral stator core; The mover II comprises a cylindrical mover core and magnets II arranged along the circumferential direction on the outer surface of the cylindrical mover core; The stator II includes a stator core and an armature winding arranged along a circumferential direction on the inner surface of the stator core.

2. A toroidal winding polyhedral linear-rotary motor according to claim 1, characterized in that: The stator I and the stator II are a common stator, and the common stator is a polyhedron stator core. The outer surface of the polyhedron stator core is provided with magnets I arranged in an axial direction, and the inner surface of the polyhedron stator core is provided with armature windings arranged in a circumferential direction. The magnetic isolation ring is arranged between the magnets I and the armature windings.

3. A toroidal winding polyhedral linear-rotary motor according to claim 2, characterized in that: The inner surface of the polyhedral rotor core is provided with a plurality of annular stator slots parallel to the axial direction, and a same-direction annular winding is installed in each annular stator slot; The inner surface of the polyhedral stator core is provided with a plurality of axial stator slots in parallel along the circumferential direction, and an armature winding is installed in each axial stator slot.

4. A toroidal winding polyhedral linear-rotary motor according to any one of claims 1 to 3, characterized in that: The polyhedral mover core comprises N flat-plate mover units, and the inner surface of the flat-plate mover unit is provided with a plurality of rectangular winding slots along the axial direction corresponding to the unidirectional annular winding arrangement.

5. The toroidal winding polyhedral linear-rotary motor according to claim 4, characterized in that: The magnet I is a sheet-shaped parallel magnetized radial permanent magnet, and the magnetic poles of two adjacent radial permanent magnets are opposite; the magnet II is an axial permanent magnet, and the magnetic poles of two adjacent axial permanent magnets are opposite.

6. A toroidal winding polyhedral linear-rotary electric machine according to claim 5, characterized in that: The magnets I are arranged along the axial direction and pasted on each outer surface of the polyhedral stator core; the magnets II are arranged along the circumferential direction and pasted on the outer surface of the cylindrical mover core.

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