Motor and control valve

Abstract

The invention discloses a motor and a control valve, and relates to the technical field of motors, the motor comprises a polar plate assembly, the polar plate assembly is annular, a winding space is defined in the polar plate assembly, and a stator hole is formed in the annular inner side of the polar plate assembly; the winding is arranged in the winding space; and the rotor is rotatably arranged in the stator hole, and the magnetic resistance is kept unchanged in the rotation process of the rotor. According to the motor, the polar plate assembly is annular, the winding space is defined in the polar plate assembly, the stator hole is formed in the annular inner side of the polar plate assembly, the winding is arranged in the winding space, the rotor is rotatably arranged in the stator hole, and in the rotation process of the rotor, magnetic resistance is kept unchanged, so that the magnetic resistance does not change along with the rotation angle change of the rotor; according to the technical scheme, the cogging torque of the motor can be weakened, the problem that the rotor rotates after the winding is powered off is solved, the control precision of the motor is higher, and the required precision requirement can be met conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more particularly, to a motor and a control valve. Background Art

[0002] In the related technology, when the winding is de-energized, the rotor will stop at different positions. Due to the existence of the cogging torque, the magnetic resistance at different positions is different. According to the principle of minimum magnetic resistance, the magnetic flux closes along the path with minimum magnetic resistance, causing the rotor to stop at a position with large magnetic resistance. The rotor is affected by the electromagnetic force, causing the rotor to rotate toward a position with small magnetic resistance, thereby causing the rotor to rotate after the winding is de-energized, making it impossible to achieve precise control of the motor and failing to meet the required accuracy requirements. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a motor that can reduce the cogging torque, thereby achieving higher control accuracy and meeting the required accuracy requirements.

[0004] Another object of the present invention is to provide a control valve having the above motor.

[0005] According to an embodiment of the present invention, the motor includes: a pole plate assembly, which is formed in a ring shape and defines a winding space inside, and the inner side of the ring shape of the pole plate assembly is formed as a stator hole; a winding, which is arranged in the winding space; and a rotor, which is rotatably arranged in the stator hole, and the magnetic resistance remains unchanged during the rotation of the rotor.

[0006] According to the motor of the embodiment of the present invention, the pole plate assembly is formed in a ring shape and defines a winding space inside. The inner side of the ring of the pole plate assembly is formed as a stator hole. The winding is arranged in the winding space. The rotor is rotatably arranged in the stator hole. During the rotation of the rotor, the magnetic resistance remains unchanged, so that the magnetic resistance does not change with the change of the rotor rotation angle. It can achieve the purpose of weakening the cogging torque of the motor and reducing the problem of the rotor rotating after the winding is powered off, so that the control accuracy of the motor is higher and it is convenient to meet the required accuracy requirements.

[0007] In addition, the motor according to the above embodiment of the present invention may also have the following additional technical features: According to some embodiments of the motor of the present invention, a plurality of pole claws are formed on the inner peripheral wall of the pole plate assembly, and the plurality of pole claws define the stator hole.

[0008] According to some embodiments of the present invention, the plurality of pole claws are evenly spaced apart along the circumferential direction of the winding space.

[0009] According to some embodiments of the present invention, along the extension direction of the pole claw, the width of the pole claw along the circumferential direction of the winding space remains unchanged.

[0010] According to some embodiments of the present invention, the pole claw extends along the axial direction of the winding space; or, the pole claw extends obliquely along the circumferential direction of the winding space; or, the pole claw includes a first extension segment and a second extension segment connected to each other, and the first extension segment and the second extension segment are at an angle to each other.

[0011] According to some embodiments of the present invention, the winding space includes a first winding space and a second winding space, and the pole plate assembly includes: a first pole plate group, the first pole plate group is formed in a ring shape and defines the first winding space internally, and the inner peripheral wall of the first pole plate group is formed with a plurality of pole claws; a second pole plate group, the first pole plate group and the second pole plate group are spaced apart along the axial direction, the second pole plate group is formed in a ring shape and defines the second winding space internally, and the inner peripheral wall of the second pole plate group is formed with a plurality of pole claws, and the windings are provided in both the first winding space and the second winding space.

[0012] According to some embodiments of the present invention, the plurality of pole claws include a first pole claw and a second pole claw, and at least one of the first pole plate group and the second pole plate group includes: a first sub-pole plate, on which a plurality of the first pole claws are provided; a second sub-pole plate, on which a plurality of the second pole claws are provided, the first sub-pole plate and the second sub-pole plate overlap and are connected to define the first winding space or the second winding space, and the plurality of the first pole claws and the plurality of the second pole claws are arranged alternately.

[0013] According to some embodiments of the present invention, the gap between any two adjacent pole claws of the first pole plate group is the same shape as the pole claws of the second pole plate group and has the same width along the circumferential direction of the winding space, and the multiple pole claws of the first pole plate group and the multiple pole claws of the second pole plate group are alternately arranged along the circumferential direction of the winding space.

[0014] According to some embodiments of the present invention, along the circumferential direction of the rotor, a total area of ​​a portion within any angular range of the rotor opposing the plurality of pole claws remains unchanged during rotation.

[0015] The control valve according to the embodiment of the present invention includes the motor according to the embodiment of the present invention.

[0016] According to the control valve of the embodiment of the present invention, the pole plate assembly is formed in a ring shape and defines a winding space inside. The inner side of the ring of the pole plate assembly is formed as a stator hole. The winding is arranged in the winding space. The rotor is rotatably arranged in the stator hole. During the rotation of the rotor, the magnetic resistance remains unchanged, so that the magnetic resistance does not change with the change of the rotor rotation angle. It can achieve the purpose of weakening the cogging torque of the motor and reducing the problem of the rotor rotating after the winding is powered off, so that the control accuracy of the motor is higher, which is convenient for meeting the required accuracy requirements.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 is a schematic diagram of a partial structure of a motor according to a first embodiment of the present invention; Figure 2 is a sectional view of a motor according to a first embodiment of the present invention; Figure 3 is a schematic structural diagram of a first sub-pole plate of a motor according to a first embodiment of the present invention; Figure 4 is a schematic structural diagram of a second sub-pole plate of a motor according to a first embodiment of the present invention; Figure 5 is a partial structural diagram of a motor according to a second embodiment of the present invention; Figure 6 is a sectional view of a motor according to a second embodiment of the present invention; Figure 7 is a schematic diagram of a partial structure of a motor according to a third embodiment of the present invention; Figure 8 is a sectional view of a motor according to a third embodiment of the present invention; Figure 9 is a schematic diagram of a motor according to an embodiment of the present invention; Figure 10 is a schematic diagram of a motor according to the related art.

[0019] Reference numerals: 100. Motor; 10. Pole plate assembly; 11. Winding space; 12. Stator hole; 13. Pole claw; 111. First winding space; 112. Second winding space; 131. First extension section; 132. Second extension section; 20. Winding; 31. First electrode plate group; 32. Second electrode plate group; 311. First sub-plate; 312. Second sub-plate; 313. Gap; 41. First pole claw; 42. Second pole claw; 50. Winding bracket; 51. Mounting cavity; 60. Connectors; 70. Rotor. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships 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 should not be understood as limiting the present invention.

[0022] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0023] The motor 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0024] Reference Figures 1-9 As shown, the motor 100 according to the embodiment of the present invention may include: a pole plate assembly 10, a winding 20 and a rotor 70. The motor 100 may be a stepping motor or the like.

[0025] Specifically, the plate assembly 10 is formed in an annular shape, and defines a winding space 11 within the plate assembly 10. The winding 20 is disposed within the winding space 11, thereby meeting the required placement of the winding 20. The inner side of the annular shape of the plate assembly 10 forms a stator hole 12, and the rotor 70 is rotatably disposed within the stator hole 12. Thus, when the winding 20 is energized, the winding 20 and the plate assembly 10 work together to generate a magnetic field, causing the rotor 70 to begin rotating under the influence of the magnetic field. When the winding 20 is de-energized, the magnetic force generated by the winding 20 and the plate assembly 10 disappears, and the rotor 70 stops rotating, thereby meeting the required usage of the motor 100.

[0026] The inventors of this application have discovered that the motor is Figure 10 In the motor of the related technology shown in , when the winding is de-energized, the rotor will stop at different positions. Due to the existence of the cogging torque, the magnetic resistance at different positions is different. According to the principle of minimum magnetic resistance, the magnetic flux closes along the path of minimum magnetic resistance, and the rotor may stop at any position. When the rotor is not stopped at the position of minimum magnetic resistance, the rotor will be affected by the magnetic force and rotate to the position of small magnetic resistance, causing the rotor to continue to rotate after the winding is de-energized, and usually it will eventually stop at the position of minimum magnetic resistance. The rotation of the rotor after power failure makes it impossible to accurately control the position of the rotor, and cannot meet the control accuracy requirements required by the product.

[0027] Therefore, in the present invention, during the rotation of the rotor 70, the magnetic resistance is kept constant, that is, the magnetic resistance does not change with the rotation angle of the rotor 70. According to the cogging torque derivation formula: ,in, is the cogging torque, is the magnetic flux passing through the air gap, R is the total magnetic resistance through which the magnetic flux passes, is the angle, since the magnetic resistance R does not rotate with the rotor 70 θ The derivative in the above formula is zero, and the cogging torque is also zero, thereby reducing the cogging torque of the motor 100 and reducing the problem of the rotor 70 rotating after the winding 20 is powered off, making the control accuracy of the motor 100 higher and meeting the required accuracy requirements. is square, so that the cogging torque is independent of the direction of the magnetic flux, and there is no need to control the direction of the magnetic flux. For example, when the motor 100 is a stepping motor, the stepping angle accuracy can be improved.

[0028] According to the motor 100 of the embodiment of the present invention, the pole plate assembly 10 is formed in a ring shape and defines a winding space 11 therein. The inner side of the ring shape of the pole plate assembly 10 is formed as a stator hole 12. The winding 20 is arranged in the winding space 11. The rotor 70 is rotatably arranged in the stator hole 12. During the rotation of the rotor 70, the magnetic resistance remains unchanged, so that the magnetic resistance does not change with the rotation angle of the rotor 70. This can weaken the cogging torque of the motor 100 and reduce the problem of the rotor 70 rotating after the winding 20 is powered off, so that the control accuracy of the motor 100 is higher, which is convenient for meeting the required accuracy requirements.

[0029] In some embodiments of the present invention, such as Figures 1-8 As shown, the inner peripheral wall of the pole plate assembly 10 is formed with a plurality of (greater than or equal to two) pole claws 13, and the plurality of pole claws 13 define the stator hole 12, so as to facilitate the rotation of the rotor 70 in the stator hole 12. The arrangement of the plurality of pole claws 13 can enhance the magnetic flux and reduce leakage, thereby balancing the magnetic resistance, suppressing harmonics, improving the electromagnetic induction efficiency, and reducing the operating vibration and noise.

[0030] According to some embodiments of the present invention, Figures 1-8 As shown, multiple pole claws 13 are evenly spaced along the circumferential direction of the winding space 11, so as to redesign the structure of the pole claws 13 of the motor 100. For example, multiple pole claws 13 are interspersed with each other in the gap 313 and form a complete ring when connected, thereby ensuring that the magnetic resistance remains unchanged during the rotation of the rotor 70, which is convenient for weakening the cogging torque of the motor 100, making the control accuracy of the motor 100 higher and meeting the required accuracy requirements. Moreover, by having a gap 313 between any two adjacent pole claws 13, lightweighting can be achieved, and at the same time, the heat dissipation effect can be improved, which is beneficial to extending the service life of the motor 100.

[0031] In some embodiments of the present invention, such as Figures 1-8 As shown, along the extension direction of the pole claw 13, the width of the pole claw 13 along the circumferential direction of the winding space 11 remains unchanged, thereby realizing a redesign of the structure of the pole claw 13 of the motor 100. For example, a plurality of pole claws 13 are interspersed with each other in the gap 313 and form a complete ring when connected, thereby ensuring that the magnetic resistance remains unchanged during the rotation of the rotor 70, facilitating the weakening of the cogging torque of the motor 100, and making the control accuracy of the motor 100 higher and meeting the required accuracy requirements.

[0032] In the embodiment of the present invention, the specific structure of the pole claw 13 can be set according to actual conditions.

[0033] For example, in some embodiments, Figure 1-Figure 4 As shown, the pole claw 13 is along the axial direction of the winding space 11 (for example Figure 2The pole claw 13 extends in the vertical direction shown in FIG, so that the structure of the pole claw 13 is simple, the pole claw 13 is easy to be processed and manufactured, the production cost can be reduced, and the design requirements of different pole claws 13 can be met.

[0034] It should be noted that, for the convenience of description, the directions such as “up and down directions” in the present invention are based on the directions shown in the accompanying drawings, and are not limitations on the directions in actual application.

[0035] Or, as Figure 5 and Figure 6 As shown, the pole claw 13 extends obliquely along the circumferential direction of the winding space 11, so that the structure of the pole claw 13 is simple, the pole claw 13 is easy to process and manufacture, the production cost can be reduced, and the design requirements of different pole claws 13 can be met.

[0036] Or, as Figure 7 and Figure 8 As shown, the pole claw 13 includes a first extension section 131 and a second extension section 132 connected to each other. The first extension section 131 and the second extension section 132 form an angle with each other and can be set according to actual conditions to meet different design requirements of the pole claw 13.

[0037] According to some embodiments of the present invention, Figures 1-8 As shown, the winding space 11 includes a first winding space 111 and a second winding space 112. The electrode assembly 10 includes a first electrode group 31 and a second electrode group 32. The first electrode group 31 is formed in an annular shape, and the interior of the first electrode group 31 defines the first winding space 111. The inner peripheral wall of the first electrode group 31 is formed with a plurality of pole claws 13. The first electrode group 31 and the second electrode group 32 are arranged in the axial direction (for example, Figure 2 The second electrode plate group 32 is formed in a ring shape, and a second winding space 112 is defined inside the second electrode plate group 32. A plurality of pole claws 13 are formed on the inner peripheral wall of the second electrode plate group 32. Windings 20 are provided in both the first winding space 111 and the second winding space 112.

[0038] Therefore, by respectively passing current into the windings 20 in the first winding space 111 and the second winding space 112, the control requirements for different rotation directions of the rotor 70 can be achieved, thereby achieving different usage requirements of the motor 100. In addition, the structure of the pole plate assembly 10 is simple, which is easy to process and manufacture, and is conducive to reducing production costs.

[0039] In some embodiments, as Figure 1 、 Figure 2 、 Figure 5-Figure 8As shown, the motor 100 includes four connectors 60, two of which are connected to the windings 20 in the first winding space 111 and extend out of the first electrode group 31, so that external structures can be connected to the windings 20 in the first winding space 111 through the connectors 60, facilitating power supply to the windings 20 in the first winding space 111 and making the connection more convenient. The other two connectors 60 are connected to the windings 20 in the second winding space 112 and extend out of the second electrode group 32, so that external structures can be connected to the windings 20 in the second winding space 112 through the connectors 60, facilitating power supply to the windings 20 in the second winding space 112 and making the connection more convenient. For example, the connectors 60 may be PIN pins.

[0040] In some embodiments of the present invention, such as Figures 1-8 As shown, multiple pole claws 13 include a first pole claw 41 and a second pole claw 42, and at least one of the first pole plate group 31 and the second pole plate group 32 includes a first sub-pole plate 311 and a second sub-pole plate 312, that is, the first pole plate group 31 includes a first sub-pole plate 311 and a second sub-pole plate 312, or the second pole plate group 32 includes a first sub-pole plate 311 and a second sub-pole plate 312, or the first pole plate group 31 and the second pole plate group 32 both include a first sub-pole plate 311 and a second sub-pole plate 312, which can be set according to actual conditions to meet different setting requirements.

[0041] The first sub-plate 311 is provided with a plurality (greater than or equal to two) of first pole claws 41, and the second sub-plate 312 is provided with a plurality (greater than or equal to two) of second pole claws 42. The first sub-plate 311 and the second sub-plate 312 overlap and are connected to each other, defining a first winding space 111 or a second winding space 112. This facilitates placement of the winding 20, prevents damage caused by exposure, and helps extend the service life. Furthermore, the simple structure of the first plate assembly 31 and / or the second plate assembly 32 facilitates processing and manufacturing, thereby reducing production costs.

[0042] In addition, if Figure 2 、 Figure 6 and Figure 8 As shown, multiple first pole claws 41 and multiple second pole claws 42 are arranged in an interlaced manner, so that the first pole plate group 31 or the second pole plate group 32 can interact with the magnetic field of the rotor 70, thereby driving the rotor 70 to rotate and ensuring stable operation of the motor 100.

[0043] According to some embodiments of the present invention, Figure 2 、 Figure 6 and Figure 8As shown, the gap 313 between any two adjacent pole claws 13 of the first pole plate group 31 has the same shape as the pole claws 13 of the second pole plate group 32, the gap 313 between any two adjacent pole claws 13 of the first pole plate group 31 has the same width as the pole claws 13 of the second pole plate group 32 along the circumferential direction of the winding space 11, and the multiple pole claws 13 of the first pole plate group 31 and the multiple pole claws 13 of the second pole plate group 32 are alternately arranged along the circumferential direction of the winding space 11.

[0044] Therefore, when the multiple pole claws 13 of the second pole plate group 32 are inserted into the multiple gaps 313 of the first pole plate group 31, the multiple pole claws 13 can be connected to each other to form a complete ring, that is, the multiple pole claws 13 of the first pole plate group 31 and the second pole plate group 32 are connected to each other to form a complete ring, and the multiple pole claws 13 do not overlap with each other, so that the total area of ​​the corresponding pole claws 13 remains unchanged when the rotor 70 rotates at any angle, thereby ensuring that the magnetic resistance remains unchanged during the rotation of the rotor 70, that is, the magnetic resistance does not change with the rotation angle of the rotor 70, which can achieve the purpose of weakening the cogging torque of the motor 100 and reducing the problem of the rotor 70 rotating after the winding 20 is powered off, so that the control accuracy of the motor 100 is higher, which is convenient for meeting the required accuracy requirements.

[0045] In some embodiments of the present invention, along the circumferential direction of the rotor 70, the total area of ​​the portion within any angular range of the rotor 70 relative to the multiple pole claws 13 remains unchanged during rotation. For example, the multiple pole claws 13 are interspersed with each other in the gap 313 and form a complete ring when connected, so that along the circumferential direction of the rotor 70, the total area of ​​the portion within any angular range of the rotor 70 relative to the multiple pole claws 13 remains unchanged during rotation, thereby ensuring that the magnetic resistance remains unchanged during the rotation of the rotor 70, that is, the magnetic resistance does not change with the rotation angle of the rotor 70, which can achieve the purpose of weakening the cogging torque of the motor 100 and reducing the problem of the rotor 70 rotating after the winding 20 is powered off, so that the control accuracy of the motor 100 is higher, which is convenient for meeting the required accuracy requirements.

[0046] In some embodiments where the electrode assembly 10 includes a first electrode plate group 31 and a second electrode plate group 32, the gap 313 between any two adjacent pole claws 13 of the first electrode plate group 31 has the same shape as the pole claws 13 of the second electrode plate group 32, the gap 313 between any two adjacent pole claws 13 of the first electrode plate group 31 has the same width as the pole claws 13 of the second electrode plate group 32 along the circumferential direction of the winding space 11, and the multiple pole claws 13 of the first electrode plate group 31 and the multiple pole claws 13 of the second electrode plate group 32 are alternately arranged along the circumferential direction of the winding space 11. Therefore, when the multiple pole claws 13 of the second pole plate group 32 are inserted into the multiple gaps 313 of the first pole plate group 31, the multiple pole claws 13 are connected to each other to form a complete ring. Therefore, along the circumferential direction of the rotor 70, the total area of ​​the portion of the rotor 70 within any angular range and the multiple pole claws 13 of the relative first pole plate group 31 and second pole plate group 32 remains unchanged during rotation, thereby ensuring that the magnetic resistance remains unchanged during the rotation of the rotor 70, that is, the magnetic resistance does not change with the rotation angle of the rotor 70, which can achieve the purpose of weakening the cogging torque of the motor 100 and reducing the problem of the rotor 70 rotating after the winding 20 is powered off, so that the control accuracy of the motor 100 is higher, which is convenient for meeting the required accuracy requirements.

[0047] In some embodiments, the pole claw 13 extends along the axis of the winding space 11, such as Figure 2 As shown, the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 extends along the axis of the winding space 11, such that the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 has the same shape as the pole claws 13 of the second pole plate assembly 32. As a result, when the multiple pole claws 13 of the second pole plate assembly 32 intersect with the multiple gaps 313 of the first pole plate assembly 31, the multiple pole claws 13 are interconnected to form a complete ring. In other words, the multiple pole claws 13 of the first and second pole plate assemblies 31, 32 are interconnected to form a complete ring, and the multiple pole claws 13 do not overlap. This ensures that the total area of ​​the corresponding pole claws 13 remains unchanged when the rotor 70 rotates at any angle. This reduces the cogging torque of the motor 100 and reduces the problem of the rotor 70 rotating after the winding 20 is de-energized. This improves the control accuracy of the motor 100 and facilitates meeting the required accuracy requirements.

[0048] In some embodiments, the pole claws 13 extend obliquely along the circumferential direction of the winding space 11, such as Figure 6As shown, the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 extends obliquely along the circumferential direction of the winding space 11, such that the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 has the same shape as the pole claws 13 of the second pole plate assembly 32. Consequently, when the multiple pole claws 13 of the second pole plate assembly 32 intersect the multiple gaps 313 of the first pole plate assembly 31, the multiple pole claws 13 are interconnected to form a complete ring. That is, the multiple pole claws 13 of the first and second pole plate assemblies 31, 32 are interconnected to form a complete ring, and the multiple pole claws 13 do not overlap. This ensures that the total area of ​​the corresponding pole claws 13 remains unchanged at any rotation angle of the rotor 70. This reduces the cogging torque of the motor 100 and mitigates the problem of the rotor 70 rotating after the winding 20 is de-energized. This improves the control accuracy of the motor 100 and facilitates meeting the required accuracy requirements.

[0049] In some embodiments, the pole claw 13 includes a first extension section 131 and a second extension section 132 connected to each other, and the first extension section 131 and the second extension section 132 are angled with each other, such as Figure 8 As shown, the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 extends in the same direction as the first extension section 131 and the second extension section 132, resulting in the gap 313 between any two adjacent pole claws 13 of the first pole plate assembly 31 having the same shape as the pole claws 13 of the second pole plate assembly 32. Consequently, when the multiple pole claws 13 of the second pole plate assembly 32 intersect the multiple gaps 313 of the first pole plate assembly 31, the multiple pole claws 13 are interconnected to form a complete ring. That is, the multiple pole claws 13 of the first pole plate assembly 31 and the second pole plate assembly 32 are interconnected to form a complete ring, and the multiple pole claws 13 do not overlap. This ensures that the total area of ​​the corresponding pole claws 13 remains unchanged at any rotation angle of the rotor 70. This reduces the cogging torque of the motor 100 and mitigates the problem of the rotor 70 rotating after the winding 20 is de-energized. This improves the control accuracy of the motor 100 and facilitates meeting the required accuracy requirements.

[0050] In some embodiments of the present invention, such as Figure 2 、 Figure 6 and Figure 8 As shown, a winding bracket 50 is provided in the winding space 11, and the winding bracket 50 has an installation cavity 51. The winding 20 is located in the installation cavity 51, so that the winding 20 is separated from the pole plate assembly 10, which can achieve insulation between the winding 20 and the pole plate assembly 10, avoid short circuit between the winding 20 and the pole plate assembly 10, and cause safety hazards and other problems, and can reduce the transmission of vibration, which is conducive to extending the service life.

[0051] In some embodiments, the winding space 11 includes a first winding space 111 and a second winding space 112. Figure 2 、 Figure 6 and Figure 8 As shown, winding brackets 50 are provided in the first winding space 111 and the second winding space 112. The winding 20 in the first winding space 111 and the winding 20 in the second winding space 112 are respectively located in the mounting cavities 51 of the two winding brackets 50, which can meet the insulation requirements of the first pole plate group 31 and the second pole plate group 32 and the winding 20.

[0052] The control valve according to the embodiment of the present invention includes the motor 100 according to the embodiment of the present invention. Since the motor 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the control valve according to the embodiment of the present invention has a plate assembly 10 formed in an annular shape and defines a winding space 11 therein, the inner side of the annular shape of the plate assembly 10 is formed as a stator hole 12, the winding 20 is disposed in the winding space 11, and the rotor 70 is rotatably disposed in the stator hole 12. During the rotation of the rotor 70, the magnetic resistance remains unchanged, so that the magnetic resistance does not change with the rotation angle of the rotor 70, which can achieve the purpose of weakening the cogging torque of the motor 100 and reducing the problem of the rotor 70 rotating after the winding 20 is powered off, so that the control accuracy of the motor 100 is higher, which is convenient for meeting the required accuracy requirements.

[0053] In some embodiments, the control valve can be an electronic expansion valve. The circuit board energizes the winding 20, and the winding 20 and the plate assembly 10 work together to generate a magnetic field, so that the rotor 70 starts to rotate under the action of the magnetic field. The rotation of the rotor 70 can adjust the opening of the valve port of the electronic expansion valve, thereby controlling the flow rate.

[0054] In addition, during the rotation of the rotor 70, the magnetic resistance remains unchanged, so that the magnetic resistance does not change with the rotation angle of the rotor 70, which can weaken the cogging torque of the motor 100 and reduce the problem of the rotor 70 rotating after the winding 20 is powered off. The control accuracy of the motor 100 is higher, thereby reducing the flow fluctuation of the control valve, improving the consistency of the flow of the control valve, and helping to improve the stability of the control valve.

[0055] Other structures and operations of the motor 100 and the control valve according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0057] Throughout this specification, reference to terms such as "embodiment," "specific embodiment," and "example" indicates that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: A plate assembly (10), the plate assembly (10) is formed in an annular shape and defines a winding space (11) therein, and the inner side of the annular shape of the plate assembly (10) is formed as a stator hole (12); A winding (20), the winding (20) being arranged in the winding space (11); A rotor (70) is rotatably disposed in the stator hole (12), and magnetic resistance remains unchanged during the rotation of the rotor (70).

2. The motor according to claim 1, characterized in that The inner peripheral wall of the pole plate assembly (10) is formed with a plurality of pole claws (13), and the plurality of pole claws (13) define the stator hole (12).

3. The motor according to claim 2, characterized in that The plurality of pole claws (13) are evenly spaced along the circumferential direction of the winding space (11).

4. The motor according to claim 2, characterized in that Along the extension direction of the pole claw (13), the width of the pole claw (13) along the circumferential direction of the winding space (11) remains unchanged.

5. The motor according to claim 4, characterized in that The pole claw (13) extends along the axial direction of the winding space (11); Alternatively, the pole claw (13) extends obliquely along the circumferential direction of the winding space (11); Alternatively, the pole claw (13) comprises a first extension section (131) and a second extension section (132) connected to each other, and the first extension section (131) and the second extension section (132) form an angle with each other.

6. The motor according to claim 2, characterized in that The winding space (11) includes a first winding space (111) and a second winding space (112), and the electrode assembly (10) includes: a first pole plate group (31), the first pole plate group (31) being formed in an annular shape and defining the first winding space (111) therein, and a plurality of pole claws (13) being formed on an inner peripheral wall of the first pole plate group (31); A second pole plate group (32), wherein the first pole plate group (31) and the second pole plate group (32) are spaced apart in the axial direction, the second pole plate group (32) is formed into a ring shape and defines the second winding space (112) therein, a plurality of pole claws (13) are formed on the inner peripheral wall of the second pole plate group (32), and the winding (20) is provided in both the first winding space (111) and the second winding space (112).

7. The motor according to claim 6, characterized in that The plurality of pole claws (13) include a first pole claw (41) and a second pole claw (42), and at least one of the first pole plate group (31) and the second pole plate group (32) includes: a first sub-pole plate (311), wherein a plurality of first pole claws (41) are provided on the first sub-pole plate (311); A second sub-polar plate (312) is provided with a plurality of second pole claws (42); the first sub-polar plate (311) and the second sub-polar plate (312) overlap and are connected to define the first winding space (111) or the second winding space (112); the plurality of first pole claws (41) and the plurality of second pole claws (42) are arranged in an interlaced manner.

8. The motor according to claim 6, characterized in that The gap (313) between any two adjacent pole claws (13) of the first pole plate group (31) is the same in shape as the pole claws (13) of the second pole plate group (32) and has the same width along the circumferential direction of the winding space (11), and the plurality of pole claws (13) of the first pole plate group (31) and the plurality of pole claws (13) of the second pole plate group (32) are alternately arranged along the circumferential direction of the winding space (11).

9. The motor according to any one of claims 2 to 8, characterized in that Along the circumferential direction of the rotor (70), the total area of ​​a portion within any angular range of the rotor (70) that is opposite to the plurality of pole claws (13) during rotation remains unchanged.

10. A control valve, characterized in that: The invention comprises an electric machine (100) according to any one of claims 1 to 9.

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