Axial switched reluctance motor rotor and its axial switched reluctance motor

Abstract

This invention provides an axial switched reluctance motor rotor and the axial switched reluctance motor thereof, belonging to the field of motors. It includes a rotor support structure, on which several sets of rotor conductive components are disposed. Each rotor conductive component includes at least one conductive structure originating from the rotor support structure and bent towards the rotor support structure from the outside of the rotor to form a pole phase. The conductive structures are connected end-to-end to form a closed loop. Several iron cores are disposed between the conductive structures, and the iron cores are evenly distributed around the axis of the rotor support structure. By using flat conductive bodies to clamp the iron cores, the mass of the iron cores is greatly reduced. Simultaneously, because the flat conductive bodies are placed vertically, the number of pole phases can be greatly increased.

Description

Technical Field

[0001] This invention belongs to the field of motor technology, and relates to reluctance motors, and more particularly to an axially switched reluctance motor rotor. Background Technology

[0002] Switched reluctance motors are a new type of speed-regulating motor, representing the latest generation of speed regulation systems following frequency conversion speed regulation systems and brushless DC motor speed regulation systems.

[0003] The switched reluctance motor (SRM) used in the switched reluctance motor speed control system is the component in the switched reluctance motor (SRD) that realizes electromechanical energy conversion, and it is also the main feature that distinguishes the SRD from other motor drive systems. The SRM is a bipolar phase variable reluctance motor, where both the stator and rotor poles are made of stacked ordinary silicon steel sheets. The rotor has neither windings nor permanent magnets, while the stator poles have concentrated windings. Two radially opposite windings connected together are called "one phase." The SRM can be designed with various phase numbers and different combinations of stator and rotor pole numbers. A higher number of phases and a smaller step angle helps reduce torque ripple, but the structure is more complex, with more main switching devices and higher cost. Currently, the four-phase 8 / 6 structure and the six-phase 12 / 8 structure are more commonly used.

[0004] Existing switched reluctance motors have the following disadvantages: the rotor core is large, and due to space limitations, only a limited number of pole phases can be set. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a switched reluctance motor rotor, thus solving the technical problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The rotor of this axial switched reluctance motor includes a rotor support structure, on which several sets of rotor conductive components are provided. Each rotor conductive component includes at least one conductive structure. The conductive structure originates from the rotor support structure and bends towards the rotor support structure on the outside of the rotor to form a pole phase. The conductive structures are connected end to end to form a closed loop. Several iron cores are provided between the conductive structures, and the iron cores are evenly distributed around the axis of the rotor support structure.

[0007] In the aforementioned axial switched reluctance motor rotor, there are at least two conductive structures in the same rotor conductive component. The conductive structure originates from the rotor support structure, forms a pole phase on the outside of the rotor, and then bends towards the rotor support structure. The end of the conductive structure is connected to the beginning of the next conductive structure, and the two conductive structures form a closed loop.

[0008] In the aforementioned axial switched reluctance motor rotor, there are multiple conductive structures. These conductive structures originate from the rotor support structure, form a pole phase on the outside of the rotor, and then bend towards the rotor support structure. The end of each conductive structure is connected to the beginning of the next conductive structure, and the conductive structures are connected in series to form a closed loop.

[0009] In the aforementioned axial switched reluctance motor rotor, the conductive structure includes at least one first conductive strip and at least one second conductive strip. The first and second conductive strips are flat strips. One end of the first conductive strip is attached to the rotor support structure, and the other end is located on the outside of the rotor. The shape of the second conductive strip is the same as or a mirror image of the shape of the first conductive strip. The first conductive strip and the second conductive strip are connected on the outside of the rotor by conductive connectors or welding to form a pole phase or are integrally formed to form a pole phase.

[0010] In the aforementioned axial switched reluctance motor rotor, there is a distribution plane between the first conductive bar and the second conductive bar, with the first conductive bar completely above the distribution plane and the second conductive bar completely below the distribution plane.

[0011] In the aforementioned axial switched reluctance motor rotor, the angle formed by the line connecting the first and last ends of the first conductive bar to the center of the rotor support structure is 360°, which is one-twice the number of conductive structures in the same rotor winding assembly.

[0012] In the aforementioned axial switched reluctance motor rotor, the first conductive bar and the second conductive bar are respectively provided with an inner connecting part and an outer connecting part. The outer connecting part of the first conductive bar is connected to the outer connecting part of the second conductive bar through a conductive connector, and the inner connecting part of the second conductive bar is connected to the inner connecting part of the next first conductive bar through a conductive connector.

[0013] The first and second conductive bars are also provided with at least one turning part;

[0014] The first and second conductive strips are further provided with iron core mounting parts, and iron cores are provided between adjacent iron core mounting parts.

[0015] In the aforementioned axial switched reluctance motor rotor, an insulating structure is provided outside the first and second conductive bars, or the rotor conductive components and the iron core are encapsulated and positioned by insulating plastic material.

[0016] In the aforementioned axial switched reluctance motor rotor, the conductive structure is evenly distributed about the rotor support structure. The conductive structure includes a first conductive bar and a second conductive bar. The conductive structures belonging to the same group of rotor conductive components are connected end to end to form a closed loop.

[0017] Alternatively, the conductive structure may include multiple first conductive strips and a number of second conductive strips equal to the number of first conductive strips. The first and second conductive strips belonging to the same set of conductive structures are connected in parallel, and the conductive structures belonging to the same set of rotor conductive components are connected end to end to form a closed loop.

[0018] The axial switched reluctance motor using the above-mentioned axial switched reluctance motor rotor includes a stator and an axial switched reluctance motor rotor. The stator is provided with a plurality of energized windings, which are independently controlled. The stator is provided with a motor housing.

[0019] Compared with existing technologies, the advantages of this invention are:

[0020] 1. By using flat conductors to clamp the iron core, the mass of the iron core is greatly reduced. At the same time, because the flat conductors are placed vertically, the number of pole phases can be greatly increased.

[0021] 2. Flat conductors cut magnetic field lines to form a magnetic field, which gives the iron core magnetic poles, reduces magnetic resistance on the magnetic circuit and better confines magnetic flux, resulting in greater torque for the rotor.

[0022] 3. Flat conductors have a large heat dissipation surface, and exhibit skin effect, proximity effect, edge effect, and eddy current loss. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure provided by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure after removing the iron core provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the conductive structure provided by the present invention;

[0026] Figure 4 This is a cross-sectional view of the motor provided by the present invention.

[0027] In the figure: 1. Rotor support structure; 2. Rotor conductive component; 3. Conductive structure; 4. Pole phase; 5. Iron core; 6. First conductive bar; 7. Second conductive bar; 8. Conductive connector; 9. Internal connection part; 10. Steering part; 11. Iron core mounting part; 12. Stator; 13. Winding. Detailed Implementation

[0028] like Figure 1As shown, the rotor of this axial switched reluctance motor includes a rotor support structure 1. Several sets of rotor conductive components 2 are provided on the rotor support structure 1. Each rotor conductive component 2 includes at least one conductive structure 3. The conductive structure 3 originates from the rotor support structure 1 and bends towards the rotor support structure 1 on the outside of the rotor to form a pole phase 4. The conductive structures 3 are connected end to end to form a closed loop. Several iron cores 5 are provided between the conductive structures 3. The iron cores 5 are evenly distributed around the axis of the rotor support structure 1.

[0029] As the stator magnetic field rotates, the magnetic field lines drive the rotor to rotate by obtaining the shortest magnetic path. The closed-loop conductive structure generates a current while cutting the magnetic field lines, and at the same time generates a magnetic field corresponding to the direction of the current. After the magnetic field is added to the iron core, it makes the iron core magnetic, effectively constrains the magnetic field lines, and reduces the magnetic reluctance of the magnetic circuit on the iron core, so that the rotor obtains a larger magnetic force and thus obtains a larger torque.

[0030] Preferably, in this embodiment, there are two conductive structures 3 in the same rotor conductive component 2, which is equivalent to 30 pole phases in the 60 conductive components 2 in this embodiment. The conductive structure 3 originates from the rotor support structure 1 and bends backward toward the rotor support structure 1 on the outside of the rotor to form a pole phase 4. The end of the conductive structure 3 is connected to the beginning of the next conductive structure 3, and the two conductive structures 3 form a closed loop. Those skilled in the art can also design the number of conductive structures in a rotor conductor assembly 2 according to the required number of pole phases, which is the total number of conductive structures divided by the number of pole phases.

[0031] Furthermore, the conductive structure 3 originates from the rotor support structure 1, forms a pole phase 4 on the outside of the rotor, and then bends towards the rotor support structure 1. The end of the conductive structure 3 is connected to the beginning of the next conductive structure 3, and the conductive structures 3 are connected in series to form a closed loop.

[0032] Preferably, the conductive structure 3 includes at least one first conductive strip 6 and at least one second conductive strip 7. The first conductive strip 6 and the second conductive strip 7 are flat strips. One end of the first conductive strip 6 is connected to the rotor support structure 1, and the other end is located on the outside of the rotor. The shape of the second conductive strip 7 is the same as or a mirror image of the shape of the first conductive strip 6. The first conductive strip 6 and the second conductive strip 7 are connected on the outside of the rotor by conductive connectors 8 or welding to form a polar phase 4 or integrally formed to form a polar phase.

[0033] Flat conductors have a large heat dissipation surface area, and exhibit skin effect, proximity effect, edge effect, and eddy current loss.

[0034] The first conductive strip 6 and the second conductive strip 7 are located on a distribution plane, with the first conductive strip 6 completely above the distribution plane and the second conductive strip 7 completely below the distribution plane.

[0035] The angle formed by the line connecting the first and last ends of the first conductive strip 6 to the center of the rotor support structure 1 is 360°, which is one-twice the number of conductive structures in the same rotor winding assembly.

[0036] The first conductive strip 6 and the second conductive strip 7 are respectively provided with an inner connecting part 9 and an outer connecting part. The outer connecting part of the first conductive strip 6 and the outer connecting part of the second conductive strip 7 are connected by a conductive connector 8. The inner connecting part 9 of the second conductive strip 7 is connected to the inner connecting part 9 of the next first conductive strip 6 by a conductive connector 8.

[0037] The first conductive strip 6 and the second conductive strip 7 are also provided with at least one turning part 10.

[0038] The first conductive strip 6 and the second conductive strip 7 are also provided with iron core mounting parts 11, and iron cores 5 are arranged between adjacent iron core mounting parts 11. The flat conductive body cuts the magnetic field lines to form a magnetic field, so that the iron core obtains magnetic poles, reduces the magnetic resistance on the magnetic circuit and better confines the magnetic flux, so that the rotor has a greater torque.

[0039] The first conductive strip 6 and the second conductive strip 7 are provided with an insulating structure, or the rotor conductive assembly 2 and the iron core 5 are encapsulated and positioned by an insulating plastic material.

[0040] The conductive structure 3 is evenly distributed about the rotor support structure 1. The conductive structure 3 includes a first conductive strip 6 and a second conductive strip 7. The conductive structures 3 belonging to the same group of rotor conductive components 2 are connected end to end to form a closed loop.

[0041] Alternatively, the conductive structure 3 may include multiple first conductive strips 6 and a number of second conductive strips 7 equal to the number of first conductive strips 6. The first conductive strips 6 and second conductive strips belonging to the same group of conductive structures 3 are connected in parallel, and the conductive structures 3 belonging to the same group of rotor conductive components 2 are connected end to end to form a closed loop.

[0042] The axial switched reluctance motor using the above-mentioned axial switched reluctance motor rotor includes a stator and an axial switched reluctance motor rotor. The stator 12 is provided with a plurality of energized windings 13, which are independently controlled. The stator 12 is provided with a motor housing.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0044] Although this document frequently uses terms such as rotor support structure 1, rotor conductive assembly 2, conductive structure 3, pole phase 4, iron core 5, first conductive bar 6, second conductive bar 7, conductive connector 8, internal connection part 9, steering part 10, iron core mounting part 11, stator 12, and winding 13, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An axial switched reluctance motor rotor, comprising a rotor support structure (1), characterized in that, The rotor support structure (1) is provided with several sets of rotor conductive components (2). The rotor conductive components (2) include at least one conductive structure (3). The conductive structure (3) originates from the rotor support structure (1) and bends towards the rotor support structure (1) on the outside of the rotor to form a pole phase (4). The conductive structures (3) are connected end to end to form a closed loop. Several iron cores (5) are provided between the conductive structures (3). The iron cores (5) are evenly distributed around the axis of the rotor support structure (1). The conductive structure (3) includes at least one first conductive strip (6) and at least one second conductive strip (7). The first conductive strip (6) and the second conductive strip (7) are flat strips. One end of the first conductive strip (6) is located on the rotor support structure (1), and the other end is located on the outside of the rotor. The shape of the second conductive strip (7) is the same as or a mirror image of the shape of the first conductive strip (6). The first conductive strip (6) and the second conductive strip (7) are connected on the outside of the rotor by conductive connectors (8) or welding to form a polar phase (4) or integrally formed to form a polar phase. The first conductive strip (6) and the second conductive strip (7) are also provided with iron core mounting parts (11), and iron cores (5) are provided between adjacent iron core mounting parts (11).

2. The axial switched reluctance motor rotor according to claim 1, characterized in that, There is at least one conductive structure (3) in the same rotor conductive component (2). The conductive structure (3) originates from the rotor support structure (1), forms a pole phase (4) on the outside of the rotor, and then bends towards the rotor support structure (1). The end of the conductive structure (3) is connected to the beginning of the next conductive structure (3), and the two conductive structures (3) form a closed loop.

3. The axial switched reluctance motor rotor according to claim 1, characterized in that, The conductive structure (3) is multiple. The conductive structure (3) originates from the rotor support structure (1), forms a pole phase (4) on the outside of the rotor, and then bends towards the rotor support structure (1). The end of the conductive structure (3) is connected to the beginning of the next conductive structure (3). The conductive structures (3) are connected in series to form a closed loop.

4. The axial switched reluctance motor rotor according to claim 1, characterized in that, The first conductive strip (6) and the second conductive strip (7) are separated by a distribution plane, with the first conductive strip (6) completely above the distribution plane and the second conductive strip (7) completely below the distribution plane.

5. The axial switched reluctance motor rotor according to claim 4, characterized in that, The angle formed by the line connecting the first and last ends of the first conductive strip (6) to the center of the rotor support structure (1) is 360°, which is one-twice the number of conductive structures in the same rotor winding assembly.

6. The axial switched reluctance motor rotor according to claim 5, characterized in that, The first conductive strip (6) and the second conductive strip (7) are respectively provided with an inner connecting part (9) and an outer connecting part. The outer connecting part of the first conductive strip (6) is connected to the outer connecting part of the second conductive strip (7) through a conductive connector (8). The inner connecting part (9) of the second conductive strip (7) is connected to the inner connecting part (9) of the next first conductive strip (6) through a conductive connector (8). The first conductive strip (6) and the second conductive strip (7) are also provided with at least one turning part (10).

7. The axial switched reluctance motor rotor according to claim 4, characterized in that, The first conductive strip (6) and the second conductive strip (7) are provided with an insulating structure, or the rotor conductive assembly (2) and the iron core (5) are encapsulated and positioned by an insulating plastic material.

8. The axial switched reluctance motor rotor according to claim 4, characterized in that, The conductive structure (3) is evenly distributed about the rotor support structure (1). The conductive structure (3) includes a first conductive strip (6) and a second conductive strip (7). The conductive structures (3) belonging to the same set of rotor conductive components (2) are connected end to end to form a closed loop. Alternatively, the conductive structure (3) may include multiple first conductive strips (6) and a number of second conductive strips (7) equal to the number of first conductive strips (6). The first conductive strips (6) and the second conductive strips belonging to the same set of conductive structures (3) are connected in parallel, and the conductive structures (3) belonging to the same set of rotor conductive components (2) are connected end to end to form a closed loop.

9. An axial switched reluctance motor employing the axial switched reluctance motor rotor described in claims 1-8, characterized in that, The stator (12) includes a stator and an axial switched reluctance motor rotor. The stator (12) is provided with several energized windings (13), which are independently controlled. The stator (12) is provided with a motor housing.

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