Magnet composite magnetic circuit motor structure and continuous permanent magnet magnetizing method

Abstract

The application belongs to the technical field of electric machines, and particularly relates to a magnet composite magnetic circuit electric machine structure and a continuous permanent magnet magnetizing method. The magnet composite magnetic circuit electric machine structure comprises a motor shell, a stator and a rotor. The stator is fixedly installed in the motor shell, and the rotor is rotatably connected in the motor shell. The rotor comprises a rotating shaft and a continuous permanent magnet body sleeved on the rotating shaft, and the rotating shaft is rotatably connected with the motor shell. The stator comprises at least one side provided with an electromagnetic assembly, which is arranged with an upper end surface, an outer circular surface and a lower end surface of the continuous permanent magnet body. An air gap is formed between the electromagnetic assembly and the continuous permanent magnet body. The continuous permanent magnet body has a three-dimensional magnetization vector which changes along a circumferential direction, and the three-dimensional magnetization vector rotates 360 degrees or an integral multiple of 360 degrees in one mechanical circumference of the continuous permanent magnet body. The three-dimensional magnetization vector simultaneously has an axial component, a radial component and a circumferential skew component in the same magnetic pole area, so that the continuous permanent magnet body simultaneously forms a working magnetic field in the air gap. An electromagnetic torque generated by the electromagnetic assembly acts on the continuous permanent magnet body.

Description

Technical Field

[0001] This invention belongs to the field of electric motor technology, and particularly relates to a magnetic composite magnetic circuit motor structure and a method for continuously magnetizing permanent magnets. Background Technology

[0002] Existing permanent magnet motors mainly include radial flux motors, axial flux motors, and axial-radial composite flux motors. To increase the output torque per unit volume, existing technologies typically expand the effective electromagnetic interaction area by increasing the number of air gaps, increasing the number of stators, setting multiple rotor discs, or separately arranging axial and radial magnets.

[0003] For example, Chinese invention patent CN121813791B discloses an asymmetric magnetic pole variable flux variable inductance reverse salient pole permanent magnet motor, including a stator structure and an asymmetric magnetic pole rotor. The stator structure is sleeved on the outer periphery of the asymmetric magnetic pole rotor. The asymmetric magnetic pole rotor includes a rotor core and variable flux magnetic pole units and variable inductance magnetic pole units alternately arranged on the rotor core. The variable flux magnetic pole unit includes a magnetic barrier and two variable flux magnetic poles with identical structures. The radial centerline of the magnetic barrier is the direct axis of the variable flux magnetic pole unit. The symmetry centerline of the variable flux magnetic pole is the cross axis of the variable flux magnetic pole unit. The variable flux magnetic pole includes a first leakage magnetic barrier arranged on its symmetry centerline and two second leakage magnetic barriers symmetrically arranged on both sides of its symmetry centerline. The system includes two first permanent magnets symmetrically arranged on both sides of its center line in a figure-eight pattern with their opening sides facing the inner ring of the rotor core. The first permanent magnets have a first end magnetic barrier at the first end near the inner ring of the rotor core. Two second leakage magnetic barriers form a discontinuous sector magnetic barrier, which is located between the first leakage magnetic barrier and the outer ring of the rotor core, with its outer end corresponding to the second end of the first permanent magnet. The variable inductance magnetic pole unit includes two identical variable inductance magnetic poles symmetrically arranged on both sides of its direct axis. The variable inductance magnetic pole includes N second permanent magnets radially arranged on the cross axis of the variable inductance magnetic pole unit and second end magnetic barriers at both ends of each second permanent magnet. The second end magnetic barriers extend to the outer ring of the rotor core, where N is an integer greater than or equal to 1.

[0004] However, the structure of the aforementioned patent documents still has the following problems: axial and radial magnetic circuits often use different magnet arrays, resulting in repetitive arrangement of permanent magnet materials and low magnet utilization. Multiple magnet arrays are mounted on different surfaces, which easily leads to assembly errors, magnetic pole phase errors, and increased costs. The axial and radial magnetic flux sections are easily misinterpreted as a mechanical superposition of multiple motor modules, failing to highlight the utilization of the three-dimensional magnetization vector within the same permanent magnet. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetic composite magnetic circuit motor structure that utilizes the same continuous permanent magnet body to simultaneously form an effective working magnetic field on the upper end surface, outer circular surface, and lower end surface through a continuously changing three-dimensional magnetization vector, and to superimpose the electromagnetic torques generated by the three stator working surfaces in the same direction.

[0006] To achieve the above objectives, an embodiment of the present invention provides a magnetic composite magnetic circuit motor structure, including a motor housing, a stator, and a rotor; the stator is fixedly installed inside the motor housing, and the rotor is rotatably connected inside the motor housing; the rotor includes a rotating shaft and a continuous permanent magnet body sleeved on the rotating shaft, and the rotating shaft is rotatably connected to the motor housing; The stator includes an electromagnetic component disposed on at least one side of the upper end face, outer circular face and lower end face of the continuous permanent magnet body; wherein an air gap is formed between the electromagnetic component and the continuous permanent magnet body. The continuous permanent magnet body has a three-dimensional magnetization vector that varies along the circumference. The three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference of the continuous permanent magnet body. The three-dimensional magnetization vector simultaneously has axial, radial, and circumferential skew components in the same magnetic pole region, so that the continuous permanent magnet body simultaneously forms a working magnetic field in the air gap. The electromagnetic torque generated by the electromagnetic component acts on the continuous permanent magnet body.

[0007] Furthermore, the electromagnetic component includes an upper end face electromagnetic coil group disposed opposite to the upper end face, an outer circular electromagnetic coil group disposed opposite to the outer circular face, and a lower end face electromagnetic coil group disposed opposite to the lower end face; an upper end face axial working air gap is formed between the upper end face electromagnetic coil group and the upper end face of the continuous permanent magnet body, a radial working air gap is formed between the outer circular electromagnetic coil group and the outer circular face of the continuous permanent magnet body, and a lower end face axial working air gap is formed between the lower end face electromagnetic coil group and the lower end face of the continuous permanent magnet body; the upper end face electromagnetic coil group, the outer circular electromagnetic coil group, and the lower end face electromagnetic coil group have the same or different number of slots, and the electromagnetic torque generated by the upper end face electromagnetic coil group, the outer circular electromagnetic coil group, and the lower end face electromagnetic coil group acts together on the continuous permanent magnet body.

[0008] Furthermore, the continuous permanent magnet body is an integral ring-shaped permanent magnet, an integral cup-shaped permanent magnet, an integral cylindrical permanent magnet, or a combined permanent magnet composed of multiple permanent magnet units spliced ​​together and equivalent to a continuous magnetized body on the magnetic circuit.

[0009] Furthermore, the three-dimensional magnetization vector is formed by twisted surface magnetization, spiral magnetization, oblique magnetization, spatial vector magnetization, or segmented vector magnetization.

[0010] Furthermore, the direction angle of the three-dimensional magnetization vector satisfies: ψ(θ) = Nθ + ψ0; where θ is the circumferential mechanical angle of the continuous permanent magnet body, N is a positive integer, and ψ0 is the initial magnetization phase angle.

[0011] Furthermore, the upper end face electromagnetic coil group, the outer circular electromagnetic coil group, and the lower end face electromagnetic coil group all include an iron core and windings, wherein the windings are slotted windings, slotless windings, concentrated windings, distributed windings, toroidal windings, or combinations thereof.

[0012] Furthermore, the slots of the upper end face electromagnetic coil group, the outer circle electromagnetic coil group, and the lower end face electromagnetic coil group are mechanically offset along the circumferential direction, or the winding currents of the upper end face electromagnetic coil group, the outer circle electromagnetic coil group, and the lower end face electromagnetic coil group are electrically compensated; the mechanical angle offset or electrical angle compensation is used to make the back EMF phases of the three electromagnetic coil groups superimpose each other, or to reduce the total cogging torque.

[0013] Furthermore, the windings of the upper electromagnetic coil group, the outer circular electromagnetic coil group, and the lower electromagnetic coil group are connected in series, in parallel, in groups, driven by independent inverters, or driven by multiple inverters in a coordinated manner.

[0014] Furthermore, the magnet composite magnetic circuit motor structure also includes a magnetic flux distribution structure, which includes at least one of a magnetically conductive back iron, a magnetically conductive bridge, a magnetically insulating groove, a magnetic resistance adjustment groove, a non-magnetically conductive spacer, a locally thickened back iron portion, or a locally thinned back iron portion; the magnetic flux distribution structure is used to adjust the ratio of magnetic flux output from the continuous permanent magnet body to the axial working air gap of the upper end face, the radial working air gap, and the axial working air gap of the lower end face.

[0015] Furthermore, the outer circular electromagnetic coil assembly includes a winding ring, and multiple winding teeth are distributed on the inner side of the winding ring, with a wire assembly wound around the winding teeth; Both the upper end face electromagnetic coil group and the lower end face electromagnetic coil group include a magnetic core, and the magnetic core is provided with multiple wire slots, and each wire slot is provided with a winding group.

[0016] The above-mentioned technical solutions in the magnet composite magnetic circuit motor structure provided in the embodiments of the present invention have at least the following technical effects: This composite magnetic circuit motor structure features a continuous permanent magnet body with a three-dimensional magnetization vector that varies along the circumference. This three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference of the continuous permanent magnet body. Within the same magnetic pole region, the three-dimensional magnetization vector simultaneously possesses axial, radial, and circumferential components, allowing the continuous permanent magnet body to simultaneously form a working magnetic field in the air gap. Electromagnetic torque generated by the electromagnetic components acts on the continuous permanent magnet body, causing the rotor to rotate. Because the same continuous permanent magnet body simultaneously serves as the magnetic source for three working air gaps, the utilization rate of permanent magnet materials can be improved. The upper, outer, and lower working surfaces of the continuous permanent magnet body jointly participate in electromagnetic energy conversion, increasing the torque output potential per unit volume. Three-dimensional closed torsional magnetization gives the magnetization vector axial, radial, and circumferential components, making it more suitable for a three-working-surface composite magnetic circuit. The assembly of the continuous permanent magnet body with the shaft is simpler and more convenient, effectively reducing assembly errors and magnetic pole phase errors. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The external structural diagram of the magnet composite magnetic circuit motor structure is provided for the embodiments of the present invention.

[0019] Figure 2 This is a top view of the magnet composite magnetic circuit motor structure provided in an embodiment of the present invention.

[0020] Figure 3 for Figure 2 AA sectional view.

[0021] Figure 4 for Figure 2 BB cross-sectional view.

[0022] Figure 5 for Figure 2 CC section view.

[0023] Figure 6 An internal structural diagram of a magnet composite magnetic circuit motor structure is provided for an embodiment of the present invention.

[0024] Figure 7 This is an internal structural diagram of another embodiment of the magnet composite magnetic circuit motor structure provided for the present invention.

[0025] Figure 8 for Figure 7 A longitudinal sectional view.

[0026] Figure 9 A structural diagram of the continuous permanent magnet body of the magnet composite magnetic circuit motor structure is provided for the embodiment of the present invention.

[0027] Figure 10 The front view of the molding orientation structure of the continuous permanent magnet body of the magnet composite magnetic circuit motor structure provided in the embodiment of the present invention.

[0028] Figure 11 for Figure 10 AA sectional view.

[0029] Figure 12 for Figure 10 BB cross-sectional view.

[0030] Figure 13 for Figure 10 CC section view.

[0031] Figure 14 for Figure 10 DD sectional view.

[0032] Figure 15 This is a schematic diagram of the magnetization structure of the continuous permanent magnet body of the magnet composite magnetic circuit motor structure provided in an embodiment of the present invention.

[0033] Figure 16 A top view of the continuous permanent magnet body of the magnetic composite magnetic circuit motor structure provided for an embodiment of the present invention.

[0034] Figure 17 for Figure 16 A schematic diagram of the polar bisectors of the AA section.

[0035] Figure 18 for Figure 16 A schematic diagram of the polar bisectors of the CC section.

[0036] Figure 19 for Figure 16 A schematic diagram of the polar bisectors of the BB section.

[0037] Figure 20 for Figure 16 A schematic diagram of the polar bisectors of the DD section.

[0038] Figure 21 A rendering of the continuous permanent magnet body of the magnetic composite magnetic circuit motor structure provided for embodiments of the present invention.

[0039] Figure 22 This is a schematic diagram of the pole division surface of the continuous permanent magnet body of the magnet composite magnetic circuit motor structure provided in an embodiment of the present invention. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0041] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0042] 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 embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0044] In one embodiment of the magnet composite magnetic circuit motor structure of the present invention, please refer to... Figures 1 to 9 The magnetic composite magnetic circuit motor structure includes a motor housing 100, a stator 200, and a rotor 300. The stator 200 is fixedly installed inside the motor housing 100, and the rotor 300 is rotatably connected inside the motor housing 100.

[0045] The rotor 300 includes a rotating shaft 310 and a continuous permanent magnet body 320 sleeved on the rotating shaft 310. The rotating shaft 310 is rotatably connected to the motor housing 100.

[0046] The stator 200 includes an electromagnetic assembly disposed on at least one side of the upper end face 321, outer circular surface 322, and lower end face 323 of the continuous permanent magnet body 320; wherein an air gap is formed between the electromagnetic assembly and the continuous permanent magnet body 320. Preferably, air gaps are provided on the upper end face 321, outer circular surface 322, and lower end face 323 of the continuous permanent magnet body 320. Specifically, the electromagnetic assembly includes an upper end face electromagnetic coil group 211 disposed opposite to the upper end face 321, an outer circular electromagnetic coil group 212 disposed opposite to the outer circular surface 322, and a lower end face electromagnetic coil group 213 disposed opposite to the lower end face 323. More preferably, the continuous permanent magnet body 320 is an integral ring-shaped permanent magnet, an integral cup-shaped permanent magnet, an integral cylindrical permanent magnet, or a combined permanent magnet composed of multiple permanent magnet units spliced ​​together and equivalent to a continuous magnetized body on the magnetic circuit.

[0047] Reference Figures 3 to 9 An axial working air gap is formed between the upper end face electromagnetic coil group 211 and the upper end face 321 of the continuous permanent magnet body 320; a radial working air gap is formed between the outer circular electromagnetic coil group 212 and the outer circular surface 322 of the continuous permanent magnet body 320; and an axial working air gap is formed between the lower end face electromagnetic coil group 213 and the lower end face 323 of the continuous permanent magnet body 320. The upper end face electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower end face electromagnetic coil group 213 may have the same or different number of slots, and the electromagnetic torque generated by the upper end face electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower end face electromagnetic coil group 213 acts together on the continuous permanent magnet body 323.

[0048] The continuous permanent magnet body 320 has a three-dimensional magnetization vector that varies along the circumference. The three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference of the continuous permanent magnet body 320. The three-dimensional magnetization vector simultaneously has axial, radial, and circumferential skew components within the same magnetic pole region, enabling the continuous permanent magnet body 323 to simultaneously form a working magnetic field in the air gap. The electromagnetic torque generated when the electromagnetic component is energized acts on the continuous permanent magnet body 320, causing the continuous permanent magnet body 320 to rotate.

[0049] In this embodiment, the continuous permanent magnet body 320 of the magnet composite magnetic circuit motor structure has a three-dimensional magnetization vector that varies along the circumferential direction. See details for further information. Figures 16 to 22The three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference of the continuous permanent magnet body 320. The three-dimensional magnetization vector simultaneously possesses axial, radial, and circumferential skew components within the same magnetic pole region, enabling the continuous permanent magnet body 320 to simultaneously form a working magnetic field in the air gap. The electromagnetic torque generated by the electromagnetic components acts on the continuous permanent magnet body 320, causing the rotor 300 to rotate. Because the same continuous permanent magnet body 320 simultaneously serves as the magnetic source for three working air gaps, the utilization rate of permanent magnet materials can be improved. The three working surfaces of the continuous permanent magnet body 320—the upper end face 321, the outer circular surface 322, and the lower end face 323—jointly participate in electromagnetic energy conversion, increasing the torque output potential per unit volume. Three-dimensional closed torsional magnetization gives the magnetization vector axial, radial, and circumferential skew components, making it more suitable for a three-working-surface composite magnetic circuit. Assembly of the continuous permanent magnet body 320 with the rotating shaft is simpler and more convenient, effectively reducing assembly errors and magnetic pole phase errors.

[0050] Furthermore, refer to Figures 10 to 14 The continuous permanent magnet body 320 can form a three-dimensional magnetization vector through twisted surface magnetization, spiral magnetization, oblique magnetization, spatial vector magnetization, or segmented vector magnetization. Preferably, the continuous permanent magnet body 320 can be formed by filling metal powder into a magnetic ring forming mold 400, compacting it, and then sintering it. Specifically, the magnetic ring forming mold 400 is provided with an annular cavity 401. Metal powder containing magnetic material is filled and compacted in the annular cavity 401 to form a magnetic ring; during the forming of the magnetic ring, the annular cavity 401 is provided with an oriented magnet array 500; the oriented magnet array 500 is formed by arranging multiple sheet magnets 510 along the circumferential direction of the annular cavity 401.

[0051] The orientation magnet array 500 includes at least one of an upper end face orientation magnet array, an outer circle orientation magnet array, a lower end face orientation magnet array, and an inner circle orientation magnet array, or a combination of multiple types. More specifically, the upper end face orientation magnet array arranges multiple sheet magnets 510 along the circumferential direction of the annular cavity 401 on the upper side of the annular cavity 401 to achieve orientation of the upper end face of the magnetic ring. The outer circle orientation magnet array arranges multiple sheet magnets 510 along the circumferential direction of the annular cavity 401 on the outer ring to achieve orientation of the outer ring of the magnetic ring. The lower end face orientation magnet array arranges multiple sheet magnets 510 along the circumferential direction of the annular cavity 401 on the lower side of the annular cavity 401 to achieve orientation of the lower end face of the magnetic ring. The inner circle orientation magnet array is formed by arranging multiple sheet magnets 510 along the circumference of the annular cavity 401 in the inner circle of the annular cavity 401 to achieve the orientation of the inner circle of the magnetic ring.

[0052] The magnetic poles of adjacent sheet magnets 510 are distributed at an angle and gradually change along the array direction of the sheet magnets 510. See details for further information. Figure 10 and Figure 14 Each sheet magnet 510 has the same external shape, but the distribution direction of its magnetic poles differs. For example, in a complete oriented magnet array 500, the S and N poles of the first sheet magnet 510 are vertical, and the polarization line is horizontal. The S and N poles of the second sheet magnet 510 along the array direction are deviated from the vertical direction, meaning the polarization line forms a certain angle with the horizontal. The size of this angle depends on the curvature of the oriented magnet array 500 and the number of sheet magnets 510. More specifically, if a complete cyclic oriented magnet array 300 has a curvature of 360° and contains 36 sheet magnets 510, the deflection angle between two adjacent sheet magnets 510 is 10°; if there are 360 ​​sheet magnets 510, the deflection angle is 1°. Therefore, during magnetic ring orientation, the magnetic material particles are oriented according to the magnetic pole direction of the sheet magnets 510 to achieve orientation in radial, circumferential, and other directions. This ensures that the magnetic ring obtains a continuously varying and stable magnetic field along its circumference. More specifically, multiple magnetization positions are set along the circumference of the magnetic ring to be magnetized. See details... Figure 15 At different magnetization positions, the direction of the magnetizing magnetic field is made to change continuously or stepwise with the circumferential mechanical angle; the permanent magnet to be magnetized forms a three-dimensional magnetization vector that changes along the circumferential direction; wherein, the three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference, and simultaneously has axial magnetization component, radial magnetization component and circumferential skew magnetization component in the same magnetic pole region.

[0053] In a specific embodiment of magnetic ring forming, magnetic powder or a binder-containing magnetic powder mixture is filled into an annular mold cavity 401. A composite orientation magnetic field is then established within the annular mold cavity 401 using a sheet-like array of oriented magnets 500 on the upper end face, outer circular surface, lower end face, and / or inner circular surface. Subsequently, the magnetic powder is pressed using an upper pressure head, a lower pressure head, or a radial pressing mechanism, forming an annular magnetic blank while maintaining the orientation magnetic field. This magnetic blank can be further thermosetting, sintering, impregnating, machining, or subsequently subjected to three-dimensional magnetization. This powder forming method is applicable to ferrite magnetic powder, rare earth permanent magnet powder, neodymium iron boron powder, samarium cobalt powder, or magnetic powder systems containing binders.

[0054] Furthermore, the direction angle of the three-dimensional magnetization vector satisfies: ψ(θ) = Nθ + ψ0; where θ is the circumferential mechanical angle of the continuous permanent magnet body 320°, N is a positive integer, and ψ0 is the initial magnetization phase angle.

[0055] Furthermore, refer to Figures 3 to 6 The upper end electromagnetic coil group 211, the outer circular electromagnetic coil group 212 and the lower end electromagnetic coil group 231 all include an iron core and windings. The windings are slotted windings, slotless windings, concentrated windings, distributed windings, toroidal windings or combinations thereof.

[0056] Preferred, refer to Figure 7 and Figure 8 The outer circular electromagnetic coil assembly 212 includes a winding ring 201, with multiple winding teeth 202 distributed on the inner side of the winding ring 201, and a wire assembly 203 wound around the winding teeth 202. Both the upper end electromagnetic coil assembly 211 and the lower end electromagnetic coil assembly 213 include a magnetic core 204, with multiple wire grooves 205 disposed within the magnetic core 204, and a wire assembly 206 disposed within each wire groove 205.

[0057] Furthermore, the slots of the upper electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower electromagnetic coil group 213 are mechanically offset along the circumferential direction, or the winding currents of the upper electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower electromagnetic coil group 213 are electrically compensated. The mechanical offset or electrical angle compensation is used to superimpose the back electromotive force phases of the three electromagnetic coil groups, or to reduce the total cogging torque. Specifically, the upper electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower electromagnetic coil group 213 have the same number of slots, but are staggered in the circumferential direction.

[0058] Furthermore, the windings of the upper electromagnetic coil group 211, the outer circular electromagnetic coil group 212, and the lower electromagnetic coil group 213 are connected in series, in parallel, in groups, driven by independent inverters, or driven by multiple inverters in a coordinated manner.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A magnetic composite magnetic circuit motor structure, comprising a motor housing, a stator, and a rotor; wherein the stator is fixedly installed inside the motor housing, and the rotor is rotatably connected inside the motor housing; characterized in that, The rotor includes a rotating shaft and a continuous permanent magnet body sleeved on the rotating shaft, and the rotating shaft is rotatably connected to the motor housing; The stator includes an electromagnetic component disposed on at least one side of the upper end face, outer circular face and lower end face of the continuous permanent magnet body; wherein an air gap is formed between the electromagnetic component and the continuous permanent magnet body. The continuous permanent magnet body has a three-dimensional magnetization vector that varies along the circumference. The three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference of the continuous permanent magnet body. The three-dimensional magnetization vector simultaneously has axial, radial, and circumferential skew components in the same magnetic pole region, so that the continuous permanent magnet body simultaneously forms a working magnetic field in the air gap. The electromagnetic torque generated by the electromagnetic component acts on the continuous permanent magnet body.

2. The magnet composite magnetic circuit motor structure according to claim 1, characterized in that: The electromagnetic assembly includes an upper end face electromagnetic coil group disposed opposite to the upper end face, an outer circular electromagnetic coil group disposed opposite to the outer circular face, and a lower end face electromagnetic coil group disposed opposite to the lower end face; an axial working air gap is formed between the upper end face electromagnetic coil group and the upper end face of the continuous permanent magnet body, a radial working air gap is formed between the outer circular electromagnetic coil group and the outer circular face of the continuous permanent magnet body, and an axial working air gap is formed between the lower end face electromagnetic coil group and the lower end face of the continuous permanent magnet body; the upper end face electromagnetic coil group, the outer circular electromagnetic coil group, and the lower end face electromagnetic coil group have the same or different number of slots, and the electromagnetic torque generated by the upper end face electromagnetic coil group, the outer circular electromagnetic coil group, and the lower end face electromagnetic coil group acts together on the continuous permanent magnet body.

3. The magnet composite magnetic circuit motor structure according to claim 1, characterized in that: The continuous permanent magnet body is an integral ring-shaped permanent magnet, an integral cup-shaped permanent magnet, an integral cylindrical permanent magnet, or a combined permanent magnet composed of multiple permanent magnet units spliced ​​together and equivalent to a continuous magnetized body on the magnetic circuit.

4. The magnet composite magnetic circuit motor structure according to claim 1, characterized in that: The three-dimensional magnetization vector is formed by twisted surface magnetization, spiral magnetization, oblique magnetization, spatial vector magnetization, or segmented vector magnetization.

5. The magnet composite magnetic circuit motor structure according to claim 1, characterized in that: The direction angle of the three-dimensional magnetization vector satisfies: ψ(θ) = Nθ + ψ0; where θ is the circumferential mechanical angle of the continuous permanent magnet body, N is a positive integer, and ψ0 is the initial magnetization phase angle.

6. The magnet composite magnetic circuit motor structure according to claim 2, characterized in that: The upper end face electromagnetic coil group, the outer circle electromagnetic coil group, and the lower end face electromagnetic coil group all include an iron core and windings. The windings are slotted windings, slotless windings, concentrated windings, distributed windings, ring windings, or combinations thereof.

7. The magnet composite magnetic circuit motor structure according to claim 6, characterized in that: The slots of the upper end face electromagnetic coil group, the outer circle electromagnetic coil group, and the lower end face electromagnetic coil group are mechanically offset along the circumferential direction, or the winding currents of the upper end face electromagnetic coil group, the outer circle electromagnetic coil group, and the lower end face electromagnetic coil group are electrically compensated; the mechanical angle offset or electrical angle compensation is used to make the back electromotive force phases of the three electromagnetic coil groups superimpose each other, or to reduce the total cogging torque.

8. The magnet composite magnetic circuit motor structure according to any one of claims 2, 6, and 7, characterized in that: The windings of the upper electromagnetic coil group, the outer circular electromagnetic coil group, and the lower electromagnetic coil group are connected in series, in parallel, in groups, driven by independent inverters, or driven by multiple inverters in a coordinated manner.

9. The magnet composite magnetic circuit motor structure according to any one of claims 2, 6, and 7, characterized in that: The outer circular electromagnetic coil assembly includes a winding ring, and multiple winding teeth are distributed on the inner side of the winding ring, with a wire assembly wound around the winding teeth. Both the upper end face electromagnetic coil group and the lower end face electromagnetic coil group include a magnetic core, and the magnetic core is provided with multiple wire slots, and each wire slot is provided with a winding group.

10. A method for magnetizing a continuous permanent magnet for manufacturing a magnetic composite magnetic circuit motor structure according to any one of claims 1 to 9, characterized in that, include: The permanent magnet to be magnetized is configured as a ring-shaped, cylindrical, cup-shaped, or closed strip structure with an upper end face, an outer circular face, and a lower end face; Multiple magnetization positions are set along the circumference of the permanent magnet to be magnetized; at different magnetization positions, the direction of the magnetizing magnetic field changes continuously or stepwise with the circumferential mechanical angle; the permanent magnet to be magnetized forms a three-dimensional magnetization vector that changes along the circumferential direction; wherein the three-dimensional magnetization vector rotates 360° or an integer multiple of 360° within a mechanical circumference, and simultaneously has axial magnetization component, radial magnetization component and circumferential skew magnetization component in the same magnetic pole region.

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