Axial-radial magnetic flux permanent magnet motor structure
By using a coreless soft line forming arc PCB coil stator and axial motor stator PCB structure in the axial radial flux permanent magnet motor, the existing motor has been solved, and the motor structure is compact, efficient and precise.
Patent Information
- Application Number
- CN202422133651.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The existing axial radial magnetic flux permanent magnet motors have bulky coil structure and large space occupancy, and there is yoke loss and unstable magnetic gap, resulting in low efficiency and insufficient operating accuracy.
The coreless soft line forming arc PCB coil stator and axial motor stator PCB structure is adopted to remove the core and yoke, and combine the radial and axial motor structure to improve the coil utilization and magnetic gap uniformity.
The motor is achieved with a compact structure, small size and light weight, which improves motor efficiency and operating accuracy, extends the service life of the rotor, and reduces iron and copper losses.
Smart Images
Figure CN223024188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and particularly relates to a structure of an axial-radial flux permanent magnet motor. Background Art
[0002] Axial-radial flux permanent magnet motors have received extensive attention due to their advantages in power density and efficiency. Currently, all existing axial-radial flux permanent magnet motors on the market adopt a coil structure with an iron core, which is heavy and occupies a large space, so the volume of the motor is also large. Among them, the radial flux motor has only one set of permanent magnets in the radial coil and requires a magnetic yoke, which results in corresponding yoke losses and fails to maximize the motor efficiency. In addition, due to the existence of radial and axial forces, axial-radial deformation will occur, and the magnetic gap value is unstable, resulting in insufficient operating accuracy. Based on this, it is particularly necessary to develop a structure of an axial-radial flux permanent magnet motor. Content of the Utility Model
[0003] Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a structure of an axial-radial flux permanent magnet motor, which has a compact structure, reasonable design, improves the coil utilization rate, enhances the motor efficiency, has a uniform magnetic gap, improves the fatigue strength and service life of the rotor, has high operating accuracy, and is easy to popularize and use.
[0004] To achieve the above purpose, the utility model is realized through the following technical solutions: A structure of an axial-radial flux permanent magnet motor includes a first motor end cover, a motor housing, a first rotor bearing, a radial outer rotor, a first axial rotor, a radial stator fixing bearing, a radial stator, an inner radial rotor and an axial rotor, a first axial stator shaft fixing bearing, an axial motor stator shaft, a second axial stator shaft fixing bearing, a second axial rotor, a second rotor bearing, a radial outer rotor fixing bearing, and a second motor end cover. The first motor end cover, the motor housing, and the second motor end cover form the housing structure of the motor. An axial-radial stator and rotor structure is installed inside the housing. At both ends of the axial motor stator shaft located in the middle, a first axial stator shaft fixing bearing and a second axial stator shaft fixing bearing are respectively installed. A first axial rotor is installed outside the first axial stator shaft fixing bearing. The first axial rotor is connected to the first rotor bearing. A second axial rotor is installed outside the second axial stator shaft fixing bearing. The second axial rotor is connected to the second rotor bearing. An inner radial rotor and an axial rotor are installed outside the first axial rotor, the axial motor stator shaft, and the second axial rotor. A radial stator is installed between the inner radial rotor and the axial rotor and the radially arranged outer rotor provided outside. The radial stator is connected to the radial stator fixing bearing, and the radial outer rotor is connected to the radial outer rotor fixing bearing. The outside of the radial outer rotor is the motor housing.
[0005] Preferably, permanent magnets are installed on the radial outer rotor, the first axial rotor, the inner radial rotor, the axial rotor, and the second axial rotor, and the permanent magnets are bonded to the rotors with glue.
[0006] Preferably, the radial stator is made of a flexible circuit board forming process to form a radial coil stator of an arc-shaped PCB coil, without an iron core, without iron loss and magnetic yoke loss, and there is no radial force at the same time, improving efficiency.
[0007] Preferably, one end of the radial outer rotor is supported by a radial outer rotor fixed bearing, improving the rotary accuracy of the rotor and facilitating the installation and fixation of the radial stator.
[0008] Preferably, the axial motor stator shaft is provided with two PCB coil stators formed by flexible circuit boards. The coil stator adopts a PCB structure, removing the iron core and magnetic yoke, without iron loss and magnetic yoke loss, reducing the application of copper and soft magnetic materials, and without radial and axial forces.
[0009] The beneficial effects of the present utility model are as follows: The structure of this motor is compact, with a small volume and reduced weight. It can improve the coil utilization rate, greatly improve the motor efficiency, has a uniform magnetic gap, enhances the fatigue strength and service life of the rotor, has high operating precision, and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present utility model will be described in detail below with reference to the drawings and specific embodiments;
[0011] Figure 1 is a three-dimensional exploded structure schematic diagram of the present utility model;
[0012] Figure 2 is a planar exploded structure schematic diagram of the present utility model;
[0013] Figure 3 is a half-sectional view of the present utility model with the first motor end cover removed. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below with reference to specific embodiments.
[0015] Refer to Figures 1 - 3, this specific embodiment adopts the following technical solution: An axial-radial flux permanent magnet motor structure includes a first motor end cover 1, a motor housing 2, a first rotor bearing 3, a radially outer rotor 4, a first axial rotor 5, a radial stator fixed bearing 6, a radial stator 7, an inner radial rotor and an axial rotor 8, a first axial stator shaft fixed bearing 9, an axial motor stator shaft 10, a second axial stator shaft fixed bearing 11, a second axial rotor 12, a second rotor bearing 13, a radially outer rotor fixed bearing 14, and a second motor end cover 15. The first motor end cover 1, the motor housing 2, and the second motor end cover 15 form the housing structure of the motor. An axial-radial stator and rotor structure is installed inside the housing. At both ends of the axial motor stator shaft 10 located in the middle, a first axial stator shaft fixed bearing 9 and a second axial stator shaft fixed bearing 11 are respectively installed. A first axial rotor 5 is installed outside the first axial stator shaft fixed bearing 9. The first axial rotor 5 is connected to the first rotor bearing 3. A second axial rotor 12 is installed outside the second axial stator shaft fixed bearing 11. The second axial rotor 12 is connected to the second rotor bearing 13. An inner radial rotor and an axial rotor 8 are installed outside the first axial rotor 5, the axial motor stator shaft 10, and the second axial rotor 12. A radial stator 7 is installed between the inner radial rotor and the axial rotor 8 and the radially outer rotor 4 provided outside. The radial stator 7 is connected to the radial stator fixed bearing 6. The radially outer rotor 4 is connected to the radially outer rotor fixed bearing 14. The outside of the radially outer rotor 4 is the motor housing 2.
[0016] It should be noted that permanent magnets are installed on the radially outer rotor 4, the first axial rotor 5, the inner radial rotor and the axial rotor 8, and the second axial rotor 12. The permanent magnets are bonded to the respective rotors with glue.
[0017] In addition, one end of the radially outer rotor 4 is supported by the radially outer rotor fixed bearing 14 to improve the rotation accuracy of the rotor and facilitate the installation and fixation of the radial stator 7.
[0018] In this specific embodiment, the radial stator 7 is made of a flexible cable forming process to form a radial coil stator of an arc-shaped PCB coil. It has no iron core, reduces weight, and has no iron loss and magnetic loss of the yoke. At the same time, there is no radial force, improving efficiency. This radial stator 7 has two permanent magnet rotors with inner and outer radials, improving the utilization rate of the stator coil and reducing copper loss at the same time. In addition, the axial motor stator shaft 10 is provided with two PCB coil stators formed by flexible cable forming. The coil stators also adopt the PCB process, removing the iron core and yoke, having no iron loss and magnetic loss of the yoke, reducing the application of copper and soft magnetic materials, and having no radial and axial forces. Therefore, the magnetic gap is uniform, which can further improve the fatigue strength and service life of the rotor; through the structural design of the axial stator PCB, the volume is reduced and the weight is reduced. More axial motor groups can be arranged in the middle according to the space size, thereby further improving the coil utilization rate and the motor efficiency.
[0019] This specific embodiment adopts a structure combining an axial motor and a radial motor. The radial motor utilizes the outer ring to maximize the force arm of the magnetic force. The structure of the middle rotor enhances the structural strength of the entire rotor, ensuring that the gap between the electromagnet and the permanent magnet varies within a certain range, ensuring that the motor power change amplitude is small, improving the fatigue strength and service life of the rotor, and strengthening the magnetic circuit strength through a double electromagnet to make up for the disadvantage of too long magnetic circuit length.
[0020] This specific embodiment effectively reduces the weight of the rotor, reduces the start-stop kinetic energy loss, reduces the iron loss and copper loss through the structural improvement of the radial stator and the axial stator, ensures that the energy conversion efficiency reaches more than 95%, and at the same time, the application of new materials can make the energy-to-mass ratio reach more than 10 KW / kg, and the volume can reach 1 / 3 of the volume of the existing motors with the same power, having broad market application prospects.
[0021] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. An axial radial flux permanent magnet motor structure, characterized in that: The motor comprises a first motor end cover (1), a motor housing (2), a first rotor bearing (3), a radial outer rotor (4), a first axial rotor (5), a radial stator fixed bearing (6), a radial stator (7), an inner radial rotor and an axial rotor (8), a first axial stator shaft fixed bearing (9), an axial motor stator shaft (10), a second axial stator shaft fixed bearing (11), a second axial rotor (12), a second rotor bearing (13), a radial outer rotor fixed bearing (14), and a second motor end cover (15). The first motor end cover (1), the motor housing (2), and the second motor end cover (15) form a housing structure of the motor. An axial and radial stator and rotor structure are installed inside the housing. The first axial stator shaft fixed bearing (9), the second axial stator shaft fixed bearing (11), and the second axial stator shaft fixed bearing (12) are installed at both ends of the axial motor stator shaft (10) located in the middle. A first axial rotor (5) is installed on the periphery of the first axial stator shaft fixed bearing (9), and the first axial rotor (5) is connected to the first rotor bearing (3). A second axial rotor (12) is installed on the periphery of the second axial stator shaft fixed bearing (11), and the second axial rotor (12) is connected to the second rotor bearing (13). An inner radial rotor and an axial rotor (8) are installed on the periphery of the first axial rotor (5), the axial motor stator shaft (10) and the second axial rotor (12). A radial stator (7) is installed between the inner radial rotor and the axial rotor (8) and a radial outer rotor (4) arranged on the periphery. The radial stator (7) is connected to the radial stator fixed bearing (6), and the radial outer rotor (4) is connected to the radial outer rotor fixed bearing (14). The periphery of the radial outer rotor (4) is a motor housing (2).
2. The axial radial flux permanent magnet motor structure according to claim 1, characterized in that: The radial outer rotor (4), the first axial rotor (5), the inner radial rotor and the axial rotor (8), and the second axial rotor (12) are all equipped with permanent magnets, which are bonded to each rotor by glue.
3. The axial radial flux permanent magnet motor structure according to claim 1, characterized in that: The radial stator (7) is a radial coil stator of a circular arc PCB coil made by a soft flat wire forming process.
4. The axial radial flux permanent magnet motor structure according to claim 1, characterized in that: One end of the radial outer rotor (4) is supported and fixed by a radial outer rotor fixing bearing (14).
5. The axial radial flux permanent magnet motor structure according to claim 1, characterized in that: The axial motor stator shaft (10) is provided with two PCB coil stators formed by flexible flat cables.