Motor for improving cogging torque and electric curtain
By adding magnetic ring parts to the rotor assembly of the motor and installing silicon steel parts on the stator assembly, the cog torque is increased by using magnetic properties, the problems of insufficient cog torque and excessive noise in the electric curtains are solved, and better quietness and comfort are achieved.
Patent Information
- Application Number
- CN202421282025.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-06
AI Technical Summary
In the application of electric curtains, the cogging torque is insufficient, which makes the curtains difficult to rise, hover or move long distances. At the same time, the saddle wave drive causes excessive noise, affecting comfort.
By adding magnetic magnetic ring members to the rotor assembly and providing silicon steel members without magnetic properties on the stator assembly, a magnetic field is formed by using magnetic action to increase the cogging torque of the motor.
It improves the cogging torque of the motor, reduces noise, improves the silentness and comfort of the motor, and meets the working requirements of electric curtains.
Smart Images
Figure CN222928138U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present utility model relate to the technical field of motors, and particularly to a motor for improving cogging torque and an electric curtain. Background Art
[0002] A motor generally includes a stator and a rotor cooperating with the stator. The rotor includes a rotating shaft, a rotor core fixed to the rotating shaft, and a commutator. The rotor core has a plurality of teeth protruding radially, and a winding groove is formed between adjacent teeth for accommodating a coil winding. The commutator includes a plurality of commutator segments, and one end of each commutator has a hook portion formed for electrically connecting with the wire end of the coil winding.
[0003] Nowadays, motor products are gradually entering the home life. Generally, the stator magnet of the motor product is magnetized with a sine wave, so that the attractive force interacting with the rotor core is smoother to achieve good quietness. However, the cogging torque of the motor is too small. Especially in the field of electric curtains, it cannot drive the curtain to rise, hover or move over a long distance. Therefore, on the market, the stator magnet mostly uses a saddle wave to drive the curtain motor. Although the cogging torque of the saddle wave drive is large, the motor has too much noise due to the large amplitude change of the ripple, resulting in poor comfort of the motor of the home product. Summary of the Utility Model
[0004] In view of the above problems, the embodiments of the present utility model provide a motor for improving cogging torque and an electric curtain, which solve the problem that when the stator magnet uses a saddle wave to drive the curtain motor, although the cogging torque of the saddle wave drive is large, the motor has too much noise due to the large amplitude change of the ripple, resulting in poor comfort of the motor of the home product.
[0005] In the first aspect,
[0006] The present utility model provides a motor for improving cogging torque, including:
[0007] A rotor assembly, including a rotating shaft, a rotor core, a rotor winding, and a magnetic ring member; the rotor core is fixedly sleeved on the rotating shaft, the rotor winding is wound around the rotor core and the rotor winding is connected to a commutator; the magnetic ring member is sleeved and fixed on the rotating shaft and the magnetic ring member is arranged away from the rotor winding;
[0008] And a stator assembly, including a housing, a stator magnet, and a silicon steel member; the stator magnet and the silicon steel member are fixedly arranged on the side wall of the housing and the stator magnet and the silicon steel member are arranged away from each other; the stator magnet is arranged around the outside of the rotor winding;
[0009] Wherein, the silicon steel member is arranged around the circumference of the magnetic ring member to increase the cogging torque of the motor.
[0010] In some alternative embodiments, the silicon steel member is composed of a plurality of stacked silicon steel sheets, and a through groove for the magnetic ring member to pass through is provided in the middle of the silicon steel sheet.
[0011] In some alternative embodiments, the silicon steel sheets are fixed to the inner wall of the housing by glue, and at least one clearance groove is dug on the surface of the silicon steel sheets.
[0012] In some alternative embodiments, a gasket is also sleeved on the rotating shaft, and the gasket is located between the magnetic ring member and one end face of the housing; both the gasket and the magnetic ring are fixed to the rotating shaft by glue.
[0013] In some alternative embodiments, the magnetic ring member is a 2-pole magnet or a 4-pole magnet or a 6-pole magnet or an 8-pole magnet; the stator magnet is a 4-pole magnet, and the number of rotor windings is 6 groups.
[0014] In some alternative embodiments, the distance between the magnetic ring member and the rotor winding is 0.5 mm - 5 mm; the distance between the silicon steel member and the stator magnet is 0.5 mm - 5 mm; the distance between the magnetic ring member and the silicon steel member is 0.1 mm - 3 mm.
[0015] In some alternative embodiments, the stator magnet is a high-performance bonded neodymium iron boron and is sinusoidally magnetized.
[0016] In some alternative embodiments, the rotor iron core includes a core body provided on the rotating shaft and a plurality of rotor teeth extending outward from the core body, and a wire groove for the rotor winding to surround is formed between adjacent rotor teeth; the rotor teeth include a tooth body and a tooth crown located at the outer end of the tooth body; wherein, the width of the tooth crown is greater than the width of the tooth body.
[0017] In some alternative embodiments, the commutator includes an insulating member and commutator segments. The insulating member is provided at one end of the rotating shaft and is arranged away from the magnetic ring member; the commutator segments are fixedly arranged on the outer periphery of the insulating member; the commutator segments are provided with hook portions for hanging the rotor windings; the stator assembly further includes an end cover and at least a pair of carbon brushes mounted on the end cover; one end of the carbon brush is electrically connected to a conductive terminal provided on the end cover, and the other end of the carbon brush elastically abuts against the commutator segments of the commutator.
[0018] In a second aspect,
[0019] The present invention provides an electric curtain, which includes the above-mentioned motor for improving cogging torque, a track, a transmission assembly, and a curtain; the transmission assembly is arranged inside the track; the motor for improving cogging torque is arranged at any end of the track, and the motor for improving cogging torque is drivingly connected to the transmission assembly; the curtain is suspended on the transmission assembly.
[0020] The embodiment of the utility model increases the motor's cogging torque by adding a magnetic ring to the rotor assembly and setting a non-magnetic silicon steel part on the stator assembly; the magnetic ring and the silicon steel part form a magnetic field through magnetic action; this design greatly improves the noise reduction effect and manufacturing cost of the motor. At the same time, the motor can be matched with a sine wave drive motor, so that the motor drive signal becomes smooth, and the motor has better quietness; it meets the working requirements of the electric curtain rising, hovering or long-distance movement.
[0021] The above description is only an overview of the technical solution of the embodiment of the utility model. In order to more clearly understand the technical means of the embodiment of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the utility model more obvious and easy to understand, the specific implementation method of the utility model is listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The accompanying drawings are only used to illustrate the embodiments and are not considered to be limitations of the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:
[0023] Figure 1 The structure diagram of the motor for improving the cogging torque provided by the utility model is shown;
[0024] Figure 2 An exploded schematic diagram of a motor for improving cogging torque provided by the utility model is shown;
[0025] Figure 3 The structure diagram of the rotor assembly provided by the utility model is shown;
[0026] Figure 4 A cross-sectional schematic diagram of a motor for improving cogging torque provided by the utility model is shown.
[0027] in,
[0028] 1. Rotor assembly; 11. Rotating shaft; 12. Rotor core; 13. Magnetic ring; 14. Steering gear; 15. Gasket; 16. Rotor teeth; 17. Wire slot; 18. Commutator segment; 19. Insulation component;
[0029] 2. stator assembly; 21. housing; 22. stator magnet; 23. silicon steel part; 24. end cover; 25. conductive terminal; 29. brush; 26. silicon steel sheet; 27. through slot; 28. air avoidance hole. DETAILED DESCRIPTION
[0030] Exemplary embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model can be implemented in various forms and should not be limited by the embodiments set forth herein.
[0031] Embodiment 1:
[0032] Figure 1-2 There is shown a motor for improving cogging torque according to the present utility model, which includes a rotor assembly 1 and a stator assembly 2; wherein, the rotor assembly 1 includes a rotating shaft 11, a rotor core 12, a rotor winding, and a magnetic ring member 13; the rotor magnetic core is fixedly sleeved on the rotating shaft 11, the rotor winding is wound around the rotor core and the rotor winding is connected to a commutator; the magnetic ring member 13 is sleeved and fixed on the rotating shaft 11 and the magnetic ring member 13 is arranged separately from the rotor winding; the stator assembly 2 includes a housing 21, a stator magnet 22, and a silicon steel member 23; the stator magnet 22 and the silicon steel member 23 are fixedly arranged on the side wall of the housing 21 and the stator magnet 22 and the silicon steel member 23 are arranged separately from each other; the stator magnet 22 is arranged around the outside of the rotor winding; wherein, the silicon steel member 23 is arranged around the periphery of the magnetic ring member 13 to increase the cogging torque of the motor.
[0033] In the embodiment of the present utility model, a magnetic magnetic ring member 13 is added to the rotor assembly 1, and a non-magnetic silicon steel member 23 is arranged in the stator assembly 2; a magnetic field is formed by the magnetic interaction between the magnetic ring member 13 and the silicon steel member 23; thereby increasing the cogging torque of the motor; such a design greatly improves the noise reduction effect and manufacturing cost of the motor. At the same time, the stator magnet 22 is a high-performance bonded neodymium iron boron with sine wave magnetization. This motor can be paired with a sine wave drive motor, so that the motor drive signal becomes smooth, realizing that the motor has better quietness; meeting the working requirements of the electric curtain for rising, hovering or long-distance movement.
[0034] Embodiment 2:
[0035] This embodiment is based on Embodiment 1 and further defines the motor for improving cogging torque. The silicon steel part 23 is composed of a plurality of silicon steel sheets 26 stacked together. A through groove 27 for the magnetic ring part 13 to pass through is arranged in the middle of the silicon steel sheet 26. By making the silicon steel part 23 non-magnetic but attracted by the magnetic ring part to form a magnetic field, the cogging torque of the motor is increased. Composing the silicon steel part 23 of a plurality of silicon steel sheets 26 stacked together can reduce the production cost of the motor and maintain the high performance of the motor. The silicon steel sheets 26 are fixed on the inner wall of the housing 21 by glue, and at least one clearance groove is dug on the surface of the silicon steel sheets 26. In this embodiment, the silicon steel sheets 26 can be fixed on the inner wall of the housing 21 in various forms such as by glue or welding; the clearance grooves of the silicon steel sheets 26 are used to cooperate and connect the motor with other components, increasing the stability of the motor product. By adding a magnetic magnetic ring part on the rotor assembly and setting a non-magnetic silicon steel part 23 on the stator assembly; forming a magnetic field through the magnetic interaction between the magnetic ring part and the silicon steel part 23; thereby increasing the cogging torque of the motor; such a design greatly improves the noise reduction effect and manufacturing cost of the motor. At the same time, this motor can be paired with a sine wave drive motor, so that the motor drive signal becomes smooth, realizing that the motor has better quietness; meeting the working requirements of the electric curtain for rising, hovering or long-distance movement.
[0036] In some alternative ways, a gasket 15 is also sleeved on the rotating shaft 11. The gasket 15 is located between the magnetic ring part 13 and one end face of the housing 21; both the gasket 15 and the magnetic ring are fixed on the rotating shaft 11 by glue. The magnetic ring part 13 is fixed through the gasket 15, making the position of the magnetic ring part 13 on the rotating shaft 11 more firm.
[0037] In some alternative ways, the magnetic ring part 13 is a 2-pole magnet or a 4-pole magnet or a 6-pole magnet or an 8-pole magnet; the stator magnet 22 is a 4-pole magnet, and the number of rotor windings is 6 groups.
[0038] In some alternative embodiments, the distance between the magnetic ring member 13 and the rotor winding is 0.5 mm - 5 mm; the distance between the silicon steel member 23 and the stator magnet 22 is 0.5 mm - 5 mm; the distance between the magnetic ring member 13 and the silicon steel member 23 is 0.1 mm - 3 mm. To prevent the magnetic ring member 13 from affecting the operation of the rotor winding, the magnetic ring member 13 and the rotor winding are arranged to be separated. Specifically, the distance between the magnetic ring member 13 and the rotor winding can be set to any one of 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm. The distance between the magnetic ring member 13 and the rotor winding is the shortest distance from any point on the magnetic ring member 13 to any point on the rotor winding. The distance between the silicon steel member 23 and the stator magnet 22 can be set to any one of 0.5 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm. The distance between the silicon steel member 23 and the stator magnet 22 is the shortest distance from any point on the silicon steel member 23 to any point on the stator magnet 22. Among them, the silicon steel member 23 and the magnetic ring member can be arranged to be of equal size and symmetrical, or the length of the silicon steel member 23 along the axis of rotation 11 can be designed to be greater than that of the magnetic ring member 13, so that the magnetic ring member 13 is arranged at the central position of the silicon steel member 23. The distance between this magnetic ring member 13 and the silicon steel member 23 is 0.1 mm - 3 mm; to ensure the magnetic force between the magnetic ring member 13 and the silicon steel member 23 and the internal space of the motor, the distance between the magnetic ring member 13 and the silicon steel member 23 can be set within 0.1 mm - 3 mm.
[0039] In some alternative embodiments, the rotor core includes a magnetic core body provided on the axis of rotation 11 and a plurality of rotor teeth extending outward from the magnetic core body. Slots 17 for the rotor winding to surround are formed between adjacent rotor teeth; the rotor teeth include tooth bodies and tooth crowns located at the outer ends of the tooth bodies; among them, the width of the tooth crown is greater than the width of the tooth body. In this embodiment, the rotor teeth are evenly distributed in the circumferential direction of the magnetic core body; the rotor teeth include tooth bodies and tooth crowns located at the outer ends of the tooth bodies to form slots 17 with a narrow opening and a large interior cross-section, and the rotor coils are wound around the rotor teeth. In this embodiment, the number of rotor teeth is 6, the number of slots 17 is 6, and the motor with this motor rotor is a 4-pole 6-slot motor, which has better balanced magnetic pull force compared with the traditional 2-pole 3-slot motor and can reduce vibration and noise. The rotor core can be formed by sequentially stacking a plurality of silicon steel sheets 26, or has an in-mold integral molding structure, and the rotor core can be a galvanized steel sheet or a silicon magnetic steel block.
[0040] In some alternative embodiments, the commutator includes an insulating member 19 and commutator segments 18. The insulating member 19 is provided at one end of the axis of rotation 11 and is arranged away from the magnetic ring member; the commutator segments are fixedly provided on the outer periphery of the insulating member 19; the commutator segments 18 are provided with hook portions for hanging the rotor winding; see Figure 2, the hook portion is located between the commutator segment and the base of the insulating component. The stator assembly 2 further includes an end cover 24 and at least a pair of brushes 29 mounted to the end cover 24; one end of the brush 29 is electrically connected to the conductive terminal 25 provided on the end cover 24, and the other end of the brush 29 elastically abuts against the commutator segment of the commutator. In this embodiment, the commutator segments of the commutator can be made of alloy materials such as silver copper and cadmium copper, and are molded with high-strength plastics. The brushes 29 on the stator are in sliding contact with the commutator to provide armature current for the rotor winding. The brushes 29 of the electromagnetic DC motor can be metal graphite brushes 29 or electrographite brushes 29.
[0041] Embodiment 3:
[0042] The present utility model provides an electric curtain, which includes the motor for improving the cogging torque, a track, a transmission assembly, and a curtain fabric as described above; the transmission assembly is arranged inside the track; the motor for improving the cogging torque is arranged at any end of the track, and the motor for improving the cogging torque is drivingly connected to the transmission assembly; the curtain fabric is suspended on the transmission assembly. In this embodiment, by adding a magnetic ring member 13 with magnetism on the rotor assembly 1 and arranging a non-magnetic silicon steel member 23 on the stator assembly 2; a magnetic field is formed through the magnetic interaction between the magnetic ring member 13 and the silicon steel member 23; thereby increasing the cogging torque of the motor; such a design greatly improves the noise reduction effect and manufacturing cost of the motor. At the same time, this motor can be paired with a sine wave drive motor, so that the motor drive signal becomes smooth, and the motor has better quietness; meeting the working requirements of the electric curtain for rising, hovering, or long-distance movement. In addition, the magnetic ring member and the rotor winding are coaxially arranged on the rotating shaft 11 and both the magnetic ring member and the rotor winding are located inside the motor, enhancing the concentricity of the magnetic ring member and the rotor, making the structure accuracy of the motor rotor and the curtain motor higher, and the motor performance more stable.
[0043] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system, or other device. In addition, the embodiments of the present utility model are not directed to any particular programming language.
[0044] In the specification provided herein, a large number of specific details are set forth. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. Similarly, in order to streamline the present utility model and help understand one or more of the various aspects of the utility model, in the above description of the exemplary embodiments of the present utility model, the various features of the embodiments of the present utility model are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims following the specific implementation manner are hereby expressly incorporated into the specific implementation manner, where each claim itself is a separate embodiment of the present utility model.
[0045] Those skilled in the art can understand that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive.
[0046] It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall 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 including several different elements and by means of a suitably programmed computer. In a unit claim listing several devices, several of these devices can be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote 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 for improving cogging torque, characterized in that: include: A rotor assembly (1) comprising a rotating shaft (11), a rotor core (12), a rotor winding, and a magnetic ring component (13); the rotor core is fixedly sleeved on the rotating shaft (11), the rotor winding is wound on the rotor core, and the rotor winding is connected to a commutator; the magnetic ring component (13) is sleeved and fixed on the rotating shaft (11), and the magnetic ring component (13) and the rotor winding are arranged separately; and a stator assembly (2), comprising a housing (21), a stator magnet (22), and a silicon steel piece (23); the stator magnet (22) and the silicon steel piece (23) are fixedly arranged on a side wall of the housing (21) and the stator magnet (22) and the silicon steel piece (23) are arranged separately; the stator magnet (22) is arranged around the outside of the rotor winding; The silicon steel part (23) is arranged around the circumference of the magnetic ring part (13) to increase the cogging torque of the motor.
2. A motor for improving cogging torque according to claim 1, characterized in that: The silicon steel piece (23) is composed of a plurality of stacked silicon steel sheets (26), and a through slot (27) for the magnetic ring piece (13) to pass through is provided in the middle of the silicon steel sheet (26).
3. A motor for improving cogging torque according to claim 2, characterized in that: The silicon steel sheet (26) is fixed to the inner wall of the housing (21) by glue, and at least one air-avoiding groove is dug on the surface of the silicon steel sheet (26).
4. A motor for improving cogging torque according to claim 1, characterized in that: The rotating shaft (11) is also sleeved with a gasket (15), and the gasket (15) is located between the magnetic ring component (13) and an end surface of the housing (21); the gasket (15) and the magnetic ring are both fixed to the rotating shaft (11) by glue.
5. The motor with improved cogging torque according to claim 1, characterized in that: The magnetic ring component (13) is a 2-pole magnet, a 4-pole magnet, a 6-pole magnet, or an 8-pole magnet; the stator magnet (22) is a 4-pole magnet, and the number of the rotor windings is 6 groups.
6. The motor with improved cogging torque according to any one of claims 1 to 5, characterized in that: The spacing between the magnetic ring component (13) and the rotor winding is 0.5 mm-5 mm; the spacing between the silicon steel component (23) and the stator magnet (22) is 0.5 mm-5 mm; and the spacing between the magnetic ring component (13) and the silicon steel component (23) is 0.1 mm-3 mm.
7. The motor with improved cogging torque according to claim 1, characterized in that: The stator magnet (22) is high-performance bonded neodymium iron boron and is sinusoidally magnetized.
8. The motor for improving the cogging torque according to claim 1, characterized in that: The rotor core (12) comprises a magnetic core body arranged on the rotating shaft (11), and a plurality of rotor teeth extending outward from the magnetic core body, wherein wire slots (17) for the rotor winding to be wound around are formed between adjacent rotor teeth; the rotor teeth comprise a tooth body and a tooth crown located at the outer end of the tooth body; wherein the width of the tooth crown is greater than the width of the tooth body.
9. The motor with improved cogging torque according to claim 8, characterized in that: The commutator comprises an insulating component (19) and a commutator segment (18); the insulating component (19) is arranged at one end of a rotating shaft (11) and is arranged away from the magnetic ring component; the commutator segment is fixedly arranged on the outer periphery of the insulating component (19); the commutator segment (18) is provided with a hook portion for hanging the rotor winding; the stator assembly (2) further comprises an end cover (24) and at least one pair of brushes (29) mounted on the end cover (24); one end of the brush (29) is electrically connected to a conductive terminal (25) arranged on the end cover (24), and the other end of the brush (29) elastically presses against the commutator segment of the commutator.
10. An electric curtain, characterized in that: It comprises a motor for increasing the cogging torque, a track, a transmission assembly, and a curtain as described in any one of claims 1 to 9; the transmission assembly is arranged inside the track; the motor for increasing the cogging torque is arranged at either end of the track, and the motor for increasing the cogging torque is drivingly connected to the transmission assembly; the curtain is suspended on the transmission assembly.