A statorless permanent magnet motor
By adopting a dual-rotor design of the central rotor and the outer rotor in the motor and integrating torque with a coaxial reverse device, the problem of insufficient torque and power of the traditional motor is solved, and a significant increase in motor power and torque and a work-to-weight ratio are achieved.
Patent Information
- Application Number
- CN202421404991.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The stator and rotor structure of traditional motors leads to the use of magnetic field forces in only one direction at the same time, extending the work time of the magnetic field forces, resulting in insufficient torque and power of the motor.
The dual rotor design of the central rotor and the outer rotor is adopted, and the central rotor is connected to the external circuit through a conductive slip ring. When the central rotor is energized, it is a coaxial reverse rotation as an electromagnetic force under the action of magnetic field force. The coaxial reverse device is used to adjust the output shaft direction of the outer rotor and the central rotor to the same direction, and integrate its torque.
The power and torque of the motor are increased, and its power and torque are doubled. The high voltage can also reduce the heat consumption of the motor armature and increase the power-to-weight ratio by more than 90%.
Smart Images
Figure CN222721340U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and more specifically, to a statorless permanent magnet motor. Background Art
[0002] A motor refers to an electromagnetic device that realizes energy conversion based on the law of electromagnetic induction. The main functions of a motor are to generate driving torque as a power source for household appliances and various machines on the one hand, and to convert mechanical energy into electrical energy on the other hand. The stator and rotor structure of a traditional motor are that the stator is fixed, and the rotor rotates under the action of magnetic force, or the rotation of the rotor causes the electromagnetic coil to produce a change in magnetic flux and then generate induced current and voltage. Traditional motors use a stator and rotor structure. According to the characteristics of the magnetic field force, only one direction of the magnetic field force is used at the same time, which prolongs the working time of the magnetic field force and greatly reduces the torque and power of the motor. Therefore, how to improve the torque and power of the motor is the technical problem to be solved by the utility model. Utility Model Content
[0003] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.
[0004] In order to at least partially solve the above problems, the utility model provides a statorless permanent magnet motor, comprising: a central rotor and an outer rotor; the central rotor and the outer rotor rotate coaxially in opposite directions under the action of a magnetic field force, the outer rotor is sleeved on the outside of the central rotor, the output shaft of the outer rotor and the output shaft of the central rotor are both connected to a coaxial reverse device, the coaxial reverse device is used to adjust the rotation direction of the output shaft of the outer rotor and the rotation direction of the output shaft of the central rotor to the same direction, the torque of the output shaft of the coaxial reverse device is the sum of the torque of the central rotor and the torque of the outer rotor, and a conductive slip ring is provided on the central rotor.
[0005] Preferably, the coaxial reverse device consists of a first transmission member connected to the central rotor, a second transmission member connected to the outer rotor, and a third transmission member for connecting the first transmission member with the second transmission member, and the third transmission member is provided with an output shaft of the coaxial reverse device, and the first transmission member, the second transmission member and the third transmission member are movably connected through a bracket.
[0006] Preferably, the central rotor consists of a first shaft and an armature winding arranged on the first shaft, the first shaft is the output shaft of the central rotor, the armature winding is located in the outer rotor, one end of the first shaft is connected to the first transmission member, and the conductive slip ring is movably connected to the armature winding through the first shaft.
[0007] Preferably, the other end of the first shaft passes through the second transmission member and the outer rotor, and the first shaft is movably connected to the second transmission member and the outer rotor.
[0008] Preferably, a mounting hole is provided at one end of the first shaft away from the coaxial reversing device, and the conductive slip ring is located in the mounting hole and is movably connected to the armature winding.
[0009] Preferably, the outer rotor consists of a second shaft and a casing with a permanent magnet arranged on the second shaft, the second shaft is the output shaft of the outer rotor, the casing is wrapped around the outside of the second shaft, the permanent magnets are arranged on the inner wall of the casing at intervals in a circular shape with the second shaft as the rotation axis, one end of the second shaft is connected to the second transmission member, and the second shaft is movably connected to the first shaft.
[0010] Preferably, the second shaft sleeve is arranged outside the first shaft, and the second shaft is movably connected to the first shaft through a first rotating member.
[0011] Preferably, the first transmission member, the second transmission member and the third transmission member are all bevel gears, the first transmission member and the second transmission member are located on the same rotation axis, and the rotation axis of the third transmission member is normal to the rotation axis of the first transmission member.
[0012] Preferably, the machine further comprises a casing, wherein the outer rotor and the central rotor are both located in the casing.
[0013] Preferably, the outer rotor is movably connected to the casing via a second rotating member.
[0014] Compared with the prior art, the present invention has at least the following beneficial effects:
[0015] Different from the single rotor of traditional motors, the utility model adopts a dual rotor design of a center rotor and an outer rotor. When the utility model is running, the center rotor is connected to the external circuit through a conductive slip ring. When the center rotor is energized, the center rotor can be regarded as an electromagnet. Under the action of the magnetic field force, the center rotor and the outer rotor rotate coaxially in opposite directions. At this time, the rotating center rotor will provide torque through the output shaft, and the outer rotor will also provide torque through the output shaft. Because the rotation directions of the two output shafts are opposite, a coaxial reverse device is required to adjust the directions of the two output shafts to the same direction, and at the same time integrate the torques of the two into the torque of the output shaft of the coaxial reverse device, so that the torque of the coaxial reverse device can reach the sum of the torques of the center rotor and the outer rotor, thereby improving the motor power, increasing the motor torque, and doubling the power and torque. The high voltage can also reduce the heat loss of the motor armature. Through the above-mentioned structural design, the power-to-weight ratio of the motor can be improved by more than 90%.
[0016] The statorless permanent magnet motor described in the present invention, other advantages, objectives and features of the present invention will be partially reflected through the following description, and will also be partially understood by technicians in this field through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0018] Figure 1 This is a front view of the statorless permanent magnet motor described in the utility model.
[0019] Figure 2 The utility model is a schematic diagram of the structure inside the casing of the statorless permanent magnet motor.
[0020] Figure 3 This is a schematic diagram of the structure inside the casing of the statorless permanent magnet motor described in the present invention (from another perspective).
[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure.
[0022] In the figure: 1 central rotor, 11 first shaft, 12 armature winding, 13 mounting hole, 2 outer rotor, 21 second shaft, 22 casing, 23 permanent magnet, 3 coaxial reverse device, 31 first transmission member, 32 second transmission member, 33 third transmission member, 4 first rotating member, 5 casing, 6 second rotating member. DETAILED DESCRIPTION
[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.
[0024] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.
[0025] like Figure 1-Figure 4 As shown, the utility model provides a statorless permanent magnet motor, comprising: a central rotor 1 and an outer rotor 2; the central rotor 1 and the outer rotor 2 rotate coaxially in opposite directions under the action of a magnetic field force, the outer rotor 2 is sleeved on the outside of the central rotor 1, the output shaft of the outer rotor 2 and the output shaft of the central rotor 1 are both connected to a coaxial reverse device 3, the coaxial reverse device 3 is used to adjust the rotation direction of the output shaft of the outer rotor 2 and the rotation direction of the output shaft of the central rotor 1 to the same direction, the torque of the output shaft of the coaxial reverse device 3 is the sum of the torque of the central rotor 1 and the torque of the outer rotor 2, and the central rotor 1 is provided with a conductive slip ring.
[0026] The working principle and beneficial effects of the above technical solution are as follows: Different from the single rotor of the traditional motor, the present invention adopts a dual rotor design of a central rotor 1 and an outer rotor 2. When the present invention is running, the central rotor 1 is connected to the external circuit through a conductive slip ring. When the central rotor 1 is energized, the central rotor 1 can be regarded as an electromagnet. Under the action of the magnetic field force, the central rotor 1 and the outer rotor 2 rotate coaxially in the opposite direction. At this time, the rotating central rotor 1 will provide torque through the output shaft, and the outer rotor 2 will also provide torque through the output shaft. Because the rotation directions of the output shafts of the two are opposite, it is necessary to set a coaxial reverse device 3 to adjust the directions of the two output shafts to the same direction, and at the same time integrate the torques of the two into the torque of the output shaft of the coaxial reverse device 3, so that the torque of the coaxial reverse device 3 can reach the sum of the torques of the central rotor 1 and the outer rotor 2, thereby improving the motor power, increasing the motor torque, and doubling the power and torque. The high voltage can also reduce the heat loss of the motor armature. Through the above structural design, the power-to-weight ratio of the motor can be improved by more than 90%.
[0027] The coaxial reverse device 3 is composed of a first transmission member 31 connected to the central rotor 1, a second transmission member 32 connected to the outer rotor 2, and a third transmission member 33 for connecting the first transmission member 31 with the second transmission member 32. The third transmission member 33 is provided with an output shaft of the coaxial reverse device 3. The first transmission member 31, the second transmission member 32, and the third transmission member 33 are movably connected through a bracket. As one embodiment of the coaxial reverse device 3, the first transmission member 31, the second transmission member 32, and the third transmission member 33 are all bevel gears, wherein the third transmission member 33 is respectively meshed with the first transmission member 31 and the second transmission member 32, such as Figure 1-4 As shown, the first transmission member 31 and the second transmission member 32 are reversed, and the output shaft of the central rotor 1 and the output shaft of the outer rotor 2 connected to the first transmission member 31 and the second transmission member 32 can be adjusted from reverse rotation to the same rotation direction, and the torque of the two can be integrated and output through the output shaft of the coaxial reverse device 3 on the third transmission member 33. It should be noted that the bevel gear tooth meshing transmission method is only one of the implementation methods of the coaxial reverse device 3. As long as the implementation method that can adjust the rotation direction of the first transmission member 31 and the second transmission member 32 to the same rotation direction through the third transmission member 33 is implemented, it should be listed within the protection scope of the utility model, such as using a roller as a transmission member and relying on friction for transmission. As one of the connection modes of the three transmission members of the coaxial reverse device 3, the first transmission member 31 and the second transmission member 32 are located on the same rotation axis, so that the central rotor 1 and the outer rotor 2 can rotate with the same rotation center axis, and the rotation axis of the third transmission member 33 is normal to the rotation axis of the first transmission member 31, so that the third transmission member 33 can adjust the rotation direction of the first transmission member 31 and the second transmission member 32, and output through the output shaft of the coaxial reverse device 3. The central rotor 1 is composed of a first shaft 11 and an armature winding 12 arranged on the first shaft 11, the first shaft 11 is the output shaft of the central rotor 1, the armature winding 12 is located in the outer rotor 2, one end of the first shaft 11 is connected to the first transmission member 31, and the conductive slip ring is movably connected to the armature winding 12 through the first shaft 11. The other end of the first shaft 11 passes through the second transmission member 32 and the outer rotor 2, and the first shaft 11 is movably connected to the second transmission member 32 and the outer rotor 2. The end of the first shaft 11 away from the coaxial reverse device 3 is provided with a mounting hole 13. Figure 4As shown, the conductive slip ring is located in the mounting hole 13 and is movably connected to the armature winding 12. The outer rotor 2 is composed of a second shaft 21 and a casing 22 with permanent magnets 23 disposed on the second shaft 21. The second shaft 21 is the output shaft of the outer rotor 2. The casing 22 is wrapped around the outside of the second shaft 21. The permanent magnets 23 are arranged on the inner wall of the casing 22 in a circumferential shape with the second shaft 21 as the rotation axis. Figure 1-3 As shown. One end of the second shaft 21 is connected to the second transmission member 32, and the second shaft 21 is movably connected to the first shaft 11. The second shaft 21 is configured to be a hollow tube, and the second shaft 21 is sleeved on the outside of the first shaft 11. The second shaft 21 is movably connected to the first shaft 11 through a first rotating member 4. A bearing can usually be selected as the first rotating member 4. Any commercially available product or prior art that can make the second shaft 21 and the first shaft 11 rotate relatively independently can be used. It also includes a casing 5, and the outer rotor 2 and the center rotor 1 are both located in the casing 5. The coaxial reverse device 3 can be arranged in the casing 5 or outside the casing 5. The outer rotor 2 is movably connected to the casing 5 through a second rotating member 6, and the second rotating member 6 can be arranged on the second shaft 21 (the coaxial reverse device 3 is outside the casing 5, as shown in FIG. 5 ). Figure 1-4 As shown), it can also be set on the first shaft 11 (the coaxial reverse device 3 is in the housing 5). Usually, a bearing can be selected as the second rotating member 6, as long as it can make the second shaft 21 and the housing 5 rotate relatively independently. Commercially available products or existing technologies can be used.
[0028] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A statorless permanent magnet motor, characterized in that: include: A central rotor (1) and an outer rotor (2); the central rotor (1) and the outer rotor (2) rotate coaxially and in opposite directions under the action of a magnetic field force; the outer rotor (2) is sleeved on the outside of the central rotor (1); the output shaft of the outer rotor (2) and the output shaft of the central rotor (1) are both connected to a coaxial reverse device (3); the coaxial reverse device (3) is used to adjust the rotation direction of the output shaft of the outer rotor (2) and the rotation direction of the output shaft of the central rotor (1) to the same direction; the torque of the output shaft of the coaxial reverse device (3) is the sum of the torque of the central rotor (1) and the torque of the outer rotor (2); and a conductive slip ring is provided on the central rotor (1).
2. The statorless permanent magnet motor according to claim 1, characterized in that: The coaxial reverse device (3) is composed of a first transmission member (31) connected to the central rotor (1), a second transmission member (32) connected to the outer rotor (2), and a third transmission member (33) used to connect the first transmission member (31) with the second transmission member (32); the third transmission member (33) is provided with an output shaft of the coaxial reverse device (3); and the first transmission member (31), the second transmission member (32) and the third transmission member (33) are movably connected to each other via a bracket.
3. The statorless permanent magnet motor according to claim 2, characterized in that: The central rotor (1) is composed of a first shaft (11) and an armature winding (12) arranged on the first shaft (11); the first shaft (11) is an output shaft of the central rotor (1); the armature winding (12) is located in the outer rotor (2); one end of the first shaft (11) is connected to the first transmission member (31); and the conductive slip ring is movably connected to the armature winding (12) via the first shaft (11).
4. The statorless permanent magnet motor according to claim 3, characterized in that: The other end of the first shaft (11) passes through the second transmission member (32) and the outer rotor (2), and the first shaft (11) is movably connected to the second transmission member (32) and the outer rotor (2).
5. The statorless permanent magnet motor according to claim 4, characterized in that: An installation hole (13) is provided at one end of the first shaft (11) away from the coaxial reversing device (3); the conductive slip ring is located in the installation hole (13) and is movably connected to the armature winding (12).
6. The statorless permanent magnet motor according to claim 3, characterized in that: The outer rotor (2) is composed of a second shaft (21) and a casing (22) with permanent magnets (23) arranged on the second shaft (21); the second shaft (21) is the output shaft of the outer rotor (2); the casing (22) is wrapped around the outside of the second shaft (21); the permanent magnets (23) are arranged on the inner wall of the casing (22) in a circumferential shape and at intervals with the second shaft (21) as the rotation axis; one end of the second shaft (21) is connected to the second transmission member (32); and the second shaft (21) is movably connected to the first shaft (11).
7. The statorless permanent magnet motor according to claim 6, characterized in that: The second shaft (21) is sleeved on the outside of the first shaft (11), and the second shaft (21) is movably connected to the first shaft (11) via a first rotating member (4).
8. The statorless permanent magnet motor according to claim 2, characterized in that: The first transmission member (31), the second transmission member (32) and the third transmission member (33) are all bevel gears; the first transmission member (31) and the second transmission member (32) are located on the same rotation axis; and the rotation axis of the third transmission member (33) is normal to the rotation axis of the first transmission member (31).
9. The statorless permanent magnet motor according to claim 1, characterized in that: It also includes a casing (5), wherein the outer rotor (2) and the central rotor (1) are both located inside the casing (5).
10. The statorless permanent magnet motor according to claim 9, characterized in that: The outer rotor (2) is movably connected to the casing (5) via a second rotating member (6).