Motor magnetic steel structure, motor and electric curtain
By setting the magnetic ring piece and silicon steel sheet on the motor rotor and housing, and setting grooves or protrusions on the matching grooves, the problem of excessive noise in the motor during the electric curtain driving is solved, and a balance between large cog torque and low noise is achieved.
Patent Information
- Application Number
- CN202421340156.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In the electric curtain drive of existing motors, the stator magnet uses saddle waves, resulting in large cogging torque but excessive noise, which affects the comfort of home products.
By providing a magnetic ring member on the motor rotor, a silicon steel sheet is provided on the motor housing, and a first groove or a first protrusion is provided on the matching groove of the silicon steel sheet, the cogging torque of the motor is increased, while reducing the self-locking force between the magnetic ring member and the silicon steel sheet and reducing noise.
It realizes that while maintaining large gear torque, reducing motor noise, improving motor comfort and operating life.
Smart Images
Figure CN222691456U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the utility model relate to the technical field of motors, and in particular to a motor magnetic steel structure, a motor and an electric curtain. Background Art
[0002] An electric motor typically includes a stator and a rotor that meshes with the stator. The rotor includes a shaft, a rotor core fixed to the shaft, and a commutator. The rotor core has a number of radially projecting teeth, with winding slots formed between adjacent teeth to accommodate coil windings. The commutator includes a number of commutator segments, each with a hook at one end for electrical connection to the ends of the coil windings.
[0003] As electric motors increasingly enter home life, the stator magnets of these motors typically use sinusoidal magnetization to smooth the interaction between the stator magnet and the rotor core, resulting in good quiet operation. However, the cogging torque of these motors is too small, especially in the field of electric curtains, where they cannot drive the curtains to rise, stop, or move long distances. Therefore, most curtain motors on the market use saddle-wave stator magnets for driving. Although saddle-wave drives produce high cogging torque, the large amplitude of wave variation results in excessive noise, leading to poor comfort in home motors. Utility Model Content
[0004] In view of the above problems, this utility model provides a motor magnet structure, a motor and an electric curtain, which solves the problem that although the stator magnet uses a saddle wave to drive the curtain motor, the motor has a large cogging torque, but the motor has excessive noise due to the large amplitude of the wave change, resulting in poor comfort of the motor in home products.
[0005] Firstly,
[0006] The utility model provides a motor magnetic steel structure, comprising:
[0007] Magnetic ring components are installed on the motor rotor.
[0008] and a metal piece, which is arranged on the motor housing, wherein a matching groove is arranged in the middle of the metal piece, and when the motor rotor is installed in the motor housing, the magnetic ring piece is arranged inside the matching groove;
[0009] Wherein, the side wall of the matching groove is provided with a first groove or a first protrusion to reduce the self-locking force of the motor rotor rotation.
[0010] In some optional embodiments, the number of the first grooves is at least 2, and the plurality of first grooves are evenly arranged on the side wall of the mating groove.
[0011] In some alternative configurations, the distance between the magnetic ring and the mating groove is 0.1 mm to 0.5 mm, and the distance between the magnetic ring and the bottom of the first groove is 2.71 mm to 2.75 mm.
[0012] In some alternative embodiments, the mating groove is further provided with a second groove, which is spaced apart from the first groove and disposed on the side wall of the mating groove.
[0013] In some alternative embodiments, the metal component is composed of multiple stacked silicon steel sheets, each of which has a through groove in the middle, and the multiple through grooves are connected to form a mating groove.
[0014] In some alternative embodiments, the metal part is further provided with at least one connecting through hole; and the metal part is further provided with a positioning groove that is disposed in a way that avoids gaps with the housing.
[0015] In some alternative embodiments, the magnetic ring is a circular ring structure, and a shaft hole for the motor rotor to pass through is provided in the middle of the magnetic ring; the magnetic ring is a bipolar magnet separated by a magnetic force boundary line.
[0016] In some alternative approaches, the number of first protrusions is at least two, and the multiple first protrusions are evenly distributed on the sidewall of the mating groove.
[0017] Secondly,
[0018] This utility model provides an electric motor, including a housing, a stator, a rotor, and the aforementioned magnet structure.
[0019] The motor stator and metal parts are arranged around the inner wall of the shell, and the motor stator and the metal parts are arranged adjacent to each other; the motor rotor is arranged in the middle of the shell and performs energy conversion with the motor stator; the magnetic ring part is arranged on the motor rotor and cooperates with the silicon steel sheet to increase the cogging torque of the motor.
[0020] Thirdly,
[0021] The utility model provides an electric curtain, comprising the above-mentioned motor, track, transmission assembly, and curtain; the transmission assembly is arranged inside the track; the motor is arranged at either end of the track, and the motor is driven and connected to the transmission assembly; the curtain is hung on the transmission assembly.
[0022] The utility model discloses a motor magnetic steel structure, a motor, and an electric curtain, the beneficial effects of which are as follows: the utility model embodiment provides a magnetic ring member on the motor rotor and a silicon steel sheet on the motor housing, so that when the motor rotor is driven, the magnetic ring member and the silicon steel sheet cooperate to increase the cogging torque of the motor. At the same time, a first groove or a first protrusion is provided on the matching groove of the silicon steel sheet, so that when the magnetic ring member rotates, the self-locking force between the magnetic ring member and the silicon steel sheet is reduced due to the different depths of the matching groove, thereby reducing the operating noise of the motor and improving the operating life of the motor.
[0023] The above description is merely an overview of the technical solutions of the present utility model embodiments. In order to better understand the technical means of the present utility model embodiments and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present utility model embodiments more obvious and understandable, specific embodiments of the present utility model are described below. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:
[0025] Figure 1 This invention provides a schematic diagram of the structure of a motor with a magnet structure.
[0026] Figure 2 A first schematic diagram of the metal part provided by this utility model is shown;
[0027] Figure 3 A second schematic diagram of the metal part provided by this utility model is shown;
[0028] Figure 4 A third schematic diagram of the metal part provided by this utility model is shown;
[0029] Figure 5 A fourth schematic diagram of the metal part provided by this utility model is shown;
[0030] Figure 6 A fifth schematic diagram of the metal part provided by this utility model is shown;
[0031] Figure 7 A cross-sectional schematic diagram of the motor provided by this utility model is shown.
[0032] in,
[0033] 1. Motor rotor; 11. Rotating shaft;
[0034] 2. Magnetic ring parts;
[0035] 3. Metal part; 31. Matching groove; 32. First groove; 33. Second groove; 34. Connecting through hole; 35. Positioning groove; 36. First groove;
[0036] 4. Shell;
[0037] 5. Motor stator. DETAILED DESCRIPTION
[0038] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein.
[0039] Example 1:
[0040] Figure 1 This invention illustrates a motor magnet structure for use in a motor, comprising a magnetic ring 2 and a metal part 3. The magnetic ring 2 is mounted on a motor rotor 1, which has a rotating shaft, and the magnetic ring 2 can be fixed to the rotating shaft. The metal part 3 is mounted on a motor housing 4, and a mating groove 31 is provided in the middle of the metal part 3. When the motor rotor 1 is installed in the motor housing 4, the magnetic ring 2 is located inside the mating groove 31. The mating groove 31 has a first groove 32 on its sidewall to reduce the self-locking force of the motor rotor 1 during rotation. This embodiment of the invention, by providing the magnetic ring 2 on the motor rotor 1 and a silicon steel sheet on the motor housing 4, increases the cogging torque of the motor by the interaction of the magnetic ring 2 and the silicon steel sheet when the motor is driving the motor rotor 1. Meanwhile, a first groove 32 or a first protrusion 36 is provided on the matching groove of the silicon steel sheet, so that when the magnetic ring 2 rotates, the depth of the matching groove is different, thereby reducing the self-locking force between the magnetic ring 2 and the silicon steel sheet, thereby reducing the operating noise of the motor and improving the service life of the motor.
[0041] In some alternative methods, see Figure 2 The number of first grooves 32 is at least two, and the multiple first grooves 32 are evenly distributed on the sidewalls of the mating groove 31. In this embodiment, when the number of first grooves 32 is two, the two first grooves 32 are respectively distributed on the opposite sidewalls of the mating groove 31. See also Figure 3 When there are four first grooves 32, the four first grooves 32 are evenly arranged on the mating groove 31, and the center point distance between two adjacent first grooves 32 can be 90°. Similarly, when there are multiple first grooves 32, they are evenly arranged on the periphery of the mating groove 31. When the magnetic ring 2 rotates in the mating groove 31, the self-locking force between the magnetic ring 2 and the silicon steel sheet weakens due to the change in magnetic field at different distances from the mating groove 31.
[0042] In some alternative configurations, the distance between the magnetic ring 2 and the mating groove 31 is 0.1mm-0.5mm, and the distance between the magnetic ring 2 and the bottom of the first groove 32 is 2.71mm-2.75mm. In this embodiment, when the ratio of the distance between the magnetic ring 2 and the sidewall of the mating groove 31 to the distance between the magnetic ring 2 and the bottom of the first groove 32 is within a certain range, it can satisfy the requirement of increasing the cogging torque of the motor while reducing the self-locking force of the magnetic ring 2 and the silicon steel sheet. Preferably, the distance between the magnetic ring 2 and the sidewall of the mating groove 31 is 0.1mm-0.5mm, and the distance between the magnetic ring 2 and the sidewall of the mating groove 31 is 0.3mm. The distance between the magnetic ring 2 and the bottom of the first groove 32 is 2.71mm-2.75mm, and the distance between the magnetic ring 2 and the bottom of the first groove 32 is 2.73mm.
[0043] In some alternative methods, see Figure 4 The mating groove 31 is further provided with a second groove 33, which is spaced apart from the first groove 32 on the side wall of the mating groove 31. In this embodiment, the mating groove 31 of the silicon steel sheet is provided with both the first groove 32 and the second groove 33; wherein, the first groove 32 and the second groove 33 can be groove structures with different depths but the same width; or, the first groove 32 and the second groove 33 can be groove structures with the same depth but different widths; or, the first groove 32 and the second groove 33 can be groove structures with both different depths and widths. In this embodiment, the first groove 32 and the second groove 33 can be spaced apart or irregularly arranged. Through the cooperation of the first groove 32 and the second groove 33, the self-locking force of the motor can be reduced. In this embodiment, by providing a magnetic ring 2 on the motor rotor 1 and a silicon steel sheet on the motor housing 4, the motor increases the cogging torque of the motor through the cooperation of the magnetic ring 2 and the silicon steel sheet when driving the motor rotor 1. At the same time, a first groove 32 is provided on the matching groove of the silicon steel sheet, so that when the magnetic ring 2 rotates, the self-locking force between the magnetic ring 2 and the silicon steel sheet is reduced due to the different depths of the matching groove, thereby reducing the working noise of the motor and improving the service life of the motor.
[0044] In some alternative embodiments, the metal part 3 is composed of multiple stacked silicon steel sheets, each of which has a through groove in its center, and the multiple through grooves are connected to form a mating groove 31. In this embodiment, by making the metal part 3 non-magnetic but attracted by the magnetic ring 2 to form a magnetic field, the cogging torque of the motor is increased. Stacking the metal part 3 from multiple silicon steel sheets 2623 can reduce the production cost of the motor while maintaining its high performance.
[0045] In some optional embodiments, the metal part 3 is further provided with at least one connecting through-hole 34; 34, the metal part 3 is also provided with a positioning groove 35 that is arranged to avoid airflow with the housing 4. In this embodiment, the metal part 3 is further provided with multiple connecting through-holes in the body, and the connecting through-holes are arranged between the matching groove 31 and the outer wall of the metal part 3. By providing the connecting through-holes, the self-locking force between the metal part 3 and the magnetic ring part 2 can be further reduced, thereby increasing the service life of the motor. At the same time, the metal part 3 is also provided with a positioning groove that is arranged to avoid airflow with the housing 4. When the motor is connected to an external component, it can be fixed to other components through the positioning groove.
[0046] In some alternative configurations, the magnetic ring 2 is a circular ring structure, with a shaft hole in the center for the motor rotor 1 to pass through; the magnetic ring 2 is a bipolar magnet separated by a magnetic force demarcation line. In this embodiment, the magnetic ring 2 can be a bipolar magnet structure with one N pole and one S pole. The magnetic ring 2 increases the cogging torque of the motor through the magnetic field generated by the silicon steel sheet.
[0047] In some optional embodiments, the number of the first protrusions is at least 2, and the plurality of first protrusions 36 are evenly arranged on the side wall of the matching groove. Figure 5 The first protrusion 36 can be protruded on both sides of the matching groove to shorten the distance between the magnetic ring and the two sides of the matching groove. Figure 6 , there can also be four first protrusions 36, and the four first protrusions 36 are evenly arranged on the matching groove 31, and the center point spacing between two adjacent first protrusions 36 can be 90 degrees. When the magnetic ring 2 rotates in the matching groove 31, the self-locking force between the magnetic ring 2 and the silicon steel sheet is weakened due to the change in the magnetic field at different distances from the matching groove 31. In addition, the side wall of the matching groove can also be provided with a second protrusion, and the second protrusion can be different in shape and size from the first protrusion. The first protrusion and the second protrusion can be spaced apart on the side wall of the matching groove.
[0048] In this embodiment, a metal with strong magnetic permeability and low iron loss is selected as the magnetic conductor; the silicon steel sheet can be stamped, and the thickness is not affected by the plate material. The sheets can be stacked to ensure the total thickness, thereby increasing the mutual attraction with the magnet; the silicon steel sheet assembly is a fixed part, and the magnet is a rotating part, and the minimum gap is set to 0.3±0.15mm to ensure the mutual attraction between the two while preventing mutual friction; the shape of the inner hole of the silicon steel sheet can be diversified, with two slots, four slots, or slots in multiples of 2, to ensure that when the magnet rotates, the self-locking force between the magnet and the silicon steel sheet reaches 50~90g.cm.
[0049] Example 2:
[0050] like Figure 7As shown, this utility model provides an electric motor, including a housing 4, a motor stator 5, a motor rotor 1, and the aforementioned motor magnet structure. The motor stator 5 and the metal part 3 are arranged around the inner wall of the housing 4, and the motor stator 5 and the metal part 3 are arranged adjacent to each other. The motor rotor 1 is arranged in the middle of the housing 4 and performs energy conversion with the motor stator 5. The magnetic ring 2 is arranged on the motor rotor 1 and cooperates with the silicon steel sheet to increase the cogging torque of the motor.
[0051] In this embodiment, the motor rotor 1 includes a shaft, a rotor core, rotor windings, and a magnetic ring 2. The rotor core is fixedly sleeved on the shaft, and the rotor windings are wound around the rotor core and connected to the commutator. The magnetic ring 2 is sleeved and fixed on the shaft and is separated from the rotor windings. The motor stator 5 includes stator magnets. This embodiment of the invention provides a magnetic ring 2 on the motor rotor 1 and silicon steel sheets on the motor housing 4. When the motor drives the rotor 1, the magnetic ring 2 and the silicon steel sheets work together to increase the cogging torque of the motor. Simultaneously, a first groove 32 is provided on the matching groove of the silicon steel sheet. When the magnetic ring 2 rotates, the different depths of the matching grooves reduce the self-locking force between the magnetic ring 2 and the silicon steel sheet, thereby reducing the operating noise of the motor and improving its service life.
[0052] Example 3:
[0053] This utility model provides an electric curtain, including the aforementioned motor, track, transmission assembly, and curtain fabric; the transmission assembly is disposed inside the track; the motor is disposed at either end of the track and is drivenly connected to the transmission assembly; the curtain fabric is suspended on the transmission assembly. In this embodiment, a magnetic ring 2 is provided on the motor rotor 1, and a silicon steel sheet is provided on the motor housing 4. When the motor drives the rotor 1, the magnetic ring 2 and the silicon steel sheet cooperate to increase the cogging torque of the motor. Simultaneously, a first groove 32 or a first protrusion 36 is provided on the matching groove of the silicon steel sheet. When the magnetic ring 2 rotates, the different depths of the matching groove reduce the self-locking force between the magnetic ring 2 and the silicon steel sheet, thereby reducing the operating noise of the motor and improving its service life.
[0054] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system, or other device. Furthermore, the embodiments of this invention are not directed to any particular programming language.
[0055] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. Similarly, for the sake of brevity and to aid in understanding one or more aspects of the invention, in the above description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof. The claims, which follow the detailed description, are hereby expressly incorporated into that detailed description, wherein each claim itself constitutes a separate embodiment of the invention.
[0056] Those skilled in the art will understand that the modules in the device of the embodiment can be adaptively changed and placed in one or more devices different from that embodiment. Modules, units, or components in the embodiment can be combined into a single module, unit, or component, and further, they can be divided into multiple sub-modules, sub-units, or sub-components, except that at least some of such features and / or processes or units are mutually exclusive.
[0057] It should be noted that the above embodiments are illustrative of the present invention and not restrictive of it, and those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims listing several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.
Claims
1. A motor magnetic steel structure, characterized in that: include: The magnetic ring component (2) is arranged on the motor rotor (1). and a metal part (3) arranged on a housing (4) of the motor, wherein a matching groove (31) is arranged in the middle of the metal part (3), and when the motor rotor (1) is installed in the motor housing (4), the magnetic ring part (2) is arranged inside the matching groove (31); Wherein, the side wall of the matching groove (31) is provided with a first groove (32) or a first protrusion (36) to reduce the self-locking force of the motor rotor (1) during rotation.
2. A motor magnetic steel structure according to claim 1, characterized in that: The number of the first grooves (32) is at least 2, and the plurality of first grooves (32) are evenly arranged on the side wall of the matching groove (31).
3. A motor magnetic steel structure according to claim 2, characterized in that: The distance between the magnetic ring component (2) and the matching groove (31) is 0.1 mm-0.5 mm, and the distance between the magnetic ring component (2) and the bottom of the first groove (32) is 2.71 mm-2.75 mm.
4. The motor magnetic steel structure according to claim 2, characterized in that: The matching groove (31) is further provided with a second groove (33), and the second groove (33) is arranged on the side wall of the matching groove (31) at an interval from the first groove (32).
5. The motor magnetic steel structure according to claim 1, characterized in that: The number of the first protrusions is at least 2, and the plurality of first protrusions are evenly arranged on the side wall of the matching groove (31).
6. The motor magnetic steel structure according to claim 1, characterized in that: The metal part (3) is composed of a plurality of stacked silicon steel sheets, each of which is provided with a through groove in the middle, and the plurality of through grooves are connected to form a matching groove (31).
7. The motor magnetic steel structure according to claim 5, characterized in that: The metal piece (3) is further provided with at least one connecting through hole (34); and the metal piece (3) is further provided with a positioning groove (35) which is arranged to avoid air between the metal piece and the housing (4).
8. The motor magnetic steel structure according to claim 1, characterized in that: The magnetic ring component (2) is a circular ring structure, and a shaft hole through which the power supply machine rotor (1) passes is provided in the middle of the magnetic ring component (2); the magnetic ring component (2) is a two-pole magnet separated by a magnetic force boundary line.
9. A motor, characterized in that: It comprises a housing (4), a motor stator (5), a motor rotor (1), and a motor magnetic steel structure according to any one of claims 1 to 8, The motor stator (5) and the metal part (3) are arranged on the inner wall of the housing (4), and the motor stator and the metal part (3) are arranged adjacent to each other; the motor rotor (1) is arranged in the middle of the housing (4) and performs energy conversion with the motor stator; the magnetic ring part (2) is arranged on the motor rotor (1) and cooperates with the silicon steel sheet to increase the cogging torque of the motor.
10. An electric curtain, characterized in that: It comprises the motor, track, transmission assembly, and curtain fabric as described in claim 9; the transmission assembly is arranged inside the track; the motor is arranged at either end of the track, and the motor is drivingly connected to the transmission assembly; the curtain fabric is suspended on the transmission assembly.