Angle phase dislocation double-harmonic parallel motor

Abstract

The invention relates to the technical field of motors, in particular to an angle phase staggered double-harmonic parallel motor which comprises a heat dissipation outer frame and further comprises stator discs, the two stator discs are both arranged in the heat dissipation outer frame and are coaxially arranged, and the two stator discs are distributed at a certain angle relative to the rotation center in the circumferential direction in a staggered mode; and the magnetic flux disc is arranged in the heat dissipation outer frame, the magnetic flux disc is located between the two stator discs, the magnetic flux disc and the stator discs are coaxially arranged, and the magnetic flux disc comprises an isolation plate. The magnetic flux disc is arranged, the permanent magnets on the two sides of the magnetic flux disc are arranged according to a Halbach array, the permanent magnets and the two stator discs with staggered angles form an independent magnetic circuit, and the air gap flux density and the torque density are improved; the two Halbach array permanent magnets are separated through the separation plate, and the permanent magnets are in a fragmentation design, so that the eddy current loss is reduced, and the heat dissipation effect is improved; large magnets and small magnets are alternately arranged to form a Halbach array, and the direction of magnetic lines of force is optimized.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a dual-harmonic parallel motor with phase misalignment. Background Technology

[0002] A dual-stator permanent magnet synchronous motor has two concentric stators, an inner and an outer one, with the rotor positioned between them, forming two air gaps. Both the inner and outer stator windings generate electromagnetic torque through these air gaps, which is applied to the rotor, creating a double-harmonic magnetic field and increasing the motor's torque and power density. However, during operation, at higher frequencies and with larger overloads, the eddy current losses in the rotor's permanent magnets increase, leading to higher magnet temperatures. This can cause irreversible demagnetization of the permanent magnets, affecting the motor's normal operation.

[0003] In existing technologies, the phase misalignment of the corresponding stator windings reduces the harmonic content of the combined magnetomotive force and electromotive force of the two armatures, and reduces the eddy current loss of the rotor permanent magnets. In this method, the arrangement and structure of the permanent magnets are simple, the coupling magnetic field strength between the rotor and the stator is weak, the magnetic field distribution is not smooth enough, and the air gap magnetic flux density and torque density are reduced. In the method of setting Halebeck distributed permanent magnets in the mounting slots of the stator and rotor, the coupling magnetic field strength is enhanced and the torque density is increased by the Halebeck distributed permanent magnets in the corresponding slots of the stator and rotor. However, in this method, the integral Halebeck array of permanent magnets is not set on the rotor, and the leakage flux and eddy current loss of the permanent magnets inside the rotor cannot be effectively reduced. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as simple arrangement and structure of permanent magnets, weak coupling magnetic field strength between rotor and stator, insufficient smooth magnetic field distribution, and reduced air gap magnetic flux density and torque density. Therefore, this invention proposes a dual-harmonic parallel motor with phase misalignment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A dual-harmonic parallel motor with phase shifting includes a heat dissipation frame and further includes: The two stator disks are both disposed inside the heat dissipation frame. The two stator disks are arranged coaxially and are offset from the rotation center by a certain angle in the circumferential direction. A flux disk is disposed inside the heat dissipation frame, located between two stator disks and coaxially arranged with them. The flux disk includes an isolation plate, on both sides of which are provided multiple permanent magnets. The multiple permanent magnets on the same side of the isolation plate are distributed in a Heilbeck array. The multiple permanent magnets in the same array are directionally magnetized to concentrate the magnetic field energy on the side facing the corresponding stator disk. The two stator disks, which are staggered, correspond one-to-one with the permanent magnet arrays on both sides of the isolation plate to form a staggered coupled magnetic field structure.

[0006] Preferably, the stator disk includes a mounting frame fixedly connected inside the heat dissipation outer frame, and multiple iron cores are fixedly connected inside the mounting frame. Coils are wound around the outside of the iron cores, and the iron cores and the coils thereon form an electromagnet. The multiple electromagnets are distributed in a circular array inside the mounting frame.

[0007] Preferably, the mounting frame is annular, with multiple external fixing posts fixedly connected to its outer edge and multiple internal fixing posts fixedly connected to its inner edge. The multiple external and internal fixing posts are arranged in a circular array on the mounting frame. The external fixing posts have external fixing holes, and the internal fixing posts have internal fixing holes. The heat dissipation outer frame has external mounting holes and internal mounting holes aligned with the external and internal fixing holes. The mounting frame and the heat dissipation outer frame are detachably connected by bolt assemblies passing through the holes.

[0008] Preferably, two adjacent outer fixing posts and two inner fixing posts form a mounting groove, and multiple electromagnets are located one-to-one inside the multiple mounting grooves, with their outer sides abutting against the fixing posts.

[0009] Preferably, the magnetic flux disk includes a fixed frame, the fixed frame is annular, the isolation plate is fixedly connected inside the fixed frame, and the fixed frame has a fixing groove for mounting permanent magnets.

[0010] Preferably, a rotating shaft is coaxially fixedly connected inside the fixed frame, a ball bearing is installed on the heat dissipation outer frame, the rotating shaft is rotatably engaged with the heat dissipation outer frame through the ball bearing, a transmission shaft is coaxially fixedly connected to the rotating shaft, a fixing block is fixedly connected to the outside of the heat dissipation outer frame, one end of the transmission shaft passes through the heat dissipation outer frame and is rotatably engaged with the fixing block, and the other end is connected to the input end of an external device.

[0011] Preferably, the permanent magnet includes large magnets and small magnets, and multiple large magnets and multiple small magnets on the same side of the isolation plate are arranged in a circular array and are staggered to form a Heilbeck array.

[0012] Preferably, both the large magnet and the small magnet are multiple stacked magnetic sheets. On both sides of the isolation plate, the magnetic sheets that make up the small magnet are a first small magnetic sheet and a second small magnetic sheet, respectively, and the magnetic sheets that make up the large magnet are a first large magnetic sheet and a second large magnetic sheet, respectively.

[0013] Preferably, the system further includes a magnetic flux leakage protection component, wherein multiple magnetic flux leakage protection components are connected between two mounting frames. Each magnetic flux leakage protection component includes a spring, and each end of the spring is fixedly connected to a fixing rod. The ends of the two fixing rods away from the spring are fixedly connected to opposite sides of the two mounting frames.

[0014] Preferably, both the spring and the fixing rod are elastic conductors, and multiple fixing rods and multiple external fixing posts are alternately distributed on the same mounting frame.

[0015] Compared with the prior art, the advantages of the present invention are as follows: 1. This invention utilizes a magnetic flux disk with permanent magnets arranged in a Halebeck array on both sides. This creates a superposition effect of the magnetic field on both sides of the flux disk, forming independent magnetic circuits with two stator disks that are angularly misaligned. A reverse closed loop is formed in the central region of the flux disk, suppressing magnetic leakage and increasing air gap magnetic flux density and torque density. An isolation plate separates the two Halebeck arrays, and the permanent magnets are designed in segments, effectively cutting off eddy current circulation paths and reducing eddy current losses. The isolation plate also serves as a heat dissipation path, improving heat dissipation. The alternating arrangement of large and small magnets in the Halebeck array smooths the magnetic field distribution, reduces high-order harmonics, further optimizes the magnetic field lines, and reduces costs while ensuring demagnetization resistance. The dual-harmonic magnetic field and non-uniform magnet design reduce torque, lower vibration, and improve rotational stability. Furthermore, the modular design of the permanent magnets facilitates independent replacement.

[0016] 2. This invention incorporates a magnetic flux leakage protection assembly. Elastic fixing rods are installed on the edges of the two stator disks, with a spring connecting the two fixing rods. Multiple magnetic flux leakage protection components surround the magnetic flux disk without contacting it. Both the fixing rods and the springs are conductors, relying on the reflection of local eddy currents on the conductor surface and the skin effect. This eliminates the need for a complete circuit, effectively suppressing the magnetic flux leakage field and reducing its impact on the device. Furthermore, it forms a secondary vibration damping unit, absorbing vibration energy of different frequencies and improving the overall stability of the device during operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall isometric structure of a dual-harmonic parallel motor with phase misalignment proposed in this invention.

[0018] Figure 2 This is a schematic diagram of a leakage flux protection component for a phase-shifted dual-harmonic parallel motor proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the ball bearing and fixing frame structure of a dual harmonic parallel motor with phase misalignment proposed in this invention.

[0020] Figure 4 This is a schematic diagram of the external and internal fixing holes of a phase-shifted dual-harmonic parallel motor proposed in this invention.

[0021] Figure 5 This is a schematic diagram of the stator disk and mounting frame structure of a phase-shifted dual-harmonic parallel motor proposed in this invention.

[0022] Figure 6 This is a schematic diagram of the isolation plate and permanent magnet structure of a phase-shifted dual-harmonic parallel motor proposed in this invention.

[0023] In the diagram: 1 Heat dissipation frame, 2 Transmission shaft, 3 Fixing block, 4 Stator plate, 5 Mounting frame, 6 External fixing hole, 7 Internal fixing hole, 8 Coil, 9 Iron core, 10 Fixing rod, 11 Spring, 12 Ball bearing, 13 Fixing frame, 14 First small magnetic piece, 15 First large magnetic piece, 16 Isolation plate, 17 Second small magnetic piece, 18 Second large magnetic piece. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0025] Reference Figures 1-6 A dual-harmonic parallel motor with phase misalignment includes a heat dissipation frame 1, and further includes: Stator disk 4, both stator disks 4 are located inside the heat dissipation frame 1. The two stator disks 4 are arranged coaxially and are distributed with a certain angular misalignment relative to the rotation center in the circumferential direction.

[0026] The stator plate 4 includes a mounting frame 5 fixedly connected inside the heat dissipation outer frame 1. Multiple iron cores 9 are fixedly connected inside the mounting frame 5. Coils 8 are wound around the outside of the iron cores 9. The iron cores 9 and the coils 8 thereon form an electromagnet. Multiple electromagnets are distributed in a circular array inside the mounting frame 5.

[0027] The mounting frame 5 is ring-shaped, with multiple external fixing posts fixedly connected to its outer edge and multiple internal fixing posts fixedly connected to its inner edge. The multiple external and internal fixing posts are arranged in a circular array on the mounting frame 5. The external fixing posts have external fixing holes 6 and the internal fixing posts have internal fixing holes 7. The heat dissipation outer frame 1 has external mounting holes and internal mounting holes aligned with the external fixing holes 6 and internal fixing holes 7. The mounting frame 5 and the heat dissipation outer frame 1 are detachably connected by bolt assemblies passing through the holes.

[0028] Two adjacent outer fixing posts and two inner fixing posts form a mounting groove. Multiple electromagnets are located one-to-one inside the multiple mounting grooves, and their outer sides abut against the fixing posts to improve the stability of the electromagnets.

[0029] The magnetic flux disk is located inside the heat dissipation frame 1, between the two stator disks 4, and is coaxial with the stator disks 4. The magnetic flux disk includes an isolation plate 16, on both sides of which are provided multiple permanent magnets. The multiple permanent magnets on the same side of the isolation plate 16 are distributed in a Heilbeck array. The multiple permanent magnets in the same array are directionally magnetized to concentrate the magnetic field energy on the side facing the corresponding stator disk 4. The two staggered stator disks 4 correspond one-to-one with the permanent magnet arrays on both sides of the isolation plate 16 to form a staggered coupled magnetic field structure.

[0030] The magnetic flux disk includes a fixed frame 13, which is ring-shaped. An isolation plate 16 is fixedly connected inside the fixed frame 13. The fixed frame 13 has a fixing groove for mounting permanent magnets.

[0031] A rotating shaft is coaxially fixedly connected inside the fixed frame 13. A ball bearing 12 is installed on the heat dissipation outer frame 1. The rotating shaft is rotatably engaged with the heat dissipation outer frame 1 through the ball bearing 12. A transmission shaft 2 is coaxially fixedly connected to the rotating shaft. A fixing block 3 is fixedly connected to the outside of the heat dissipation outer frame 1. One end of the transmission shaft 2 passes through the heat dissipation outer frame 1 and is rotatably engaged with the fixing block 3. The other end is connected to the input end of an external device.

[0032] The permanent magnets include large magnets and small magnets. Multiple large magnets and multiple small magnets on the same side of the isolation plate 16 are arranged in a circular array and are staggered, forming a Heilbeck array together.

[0033] The Halbach array achieves a "one-way focusing" effect by designing the magnetization direction of permanent magnets to significantly enhance the magnetic field on one side and greatly weaken it on the other.

[0034] Both the large magnet and the small magnet are multiple stacked magnetic sheets. The magnetic sheets that make up the small magnet are the first small magnetic sheet 14 and the second small magnetic sheet 17, and the magnetic sheets that make up the large magnet are the first large magnetic sheet 15 and the second large magnetic sheet 18.

[0035] Adjacent magnetic sheets are connected by an isolation layer formed by a non-magnetic material, which physically blocks the eddy current path and reduces eddy current loss.

[0036] Small-sized magnetic sheets are easier to process, reducing the risk of cracking of the entire permanent magnet, facilitating assembly, and ensuring that the overall performance does not drop significantly when a local magnetic sheet is damaged or demagnetized, thus improving motor reliability and making replacement easier.

[0037] The segmented design increases the contact area between the permanent magnet and the cooling medium, which can improve heat dissipation efficiency.

[0038] The edges of the magnetic sheet are rounded to effectively suppress the generation of higher harmonics.

[0039] It also includes magnetic flux leakage protection components. Multiple magnetic flux leakage protection components are connected between two mounting frames 5. The magnetic flux leakage protection components include springs 11, and fixing rods 10 are fixedly connected to both ends of the springs 11. The ends of the two fixing rods 10 away from the springs 11 are fixedly connected to the opposite sides of the two mounting frames 5.

[0040] Both the spring 11 and the fixing rod 10 are elastic conductors, and multiple fixing rods 10 and multiple external fixing posts are alternately distributed on the same mounting frame 5.

[0041] When this invention is used, two stator disks 4 are installed inside the heat dissipation frame 1, and a magnetic flux disk is located between the two stator disks 4. After the two stator disks 4 are energized, the magnetic flux disk starts to rotate under the action of the magnetic field. The rotating shaft on the magnetic flux disk drives the transmission shaft 2 to rotate with the assistance of the ball bearing 12, thereby driving the external device to rotate.

[0042] The permanent magnets on both sides of the isolation plate 16 in the flux disk are in a Heilbeck array, which enhances the magnetic field toward the stator disk 4 and strengthens the driving effect of the stator disk 4 on the flux disk.

[0043] The two stator disks 4 are staggered. Compared with the traditional axial flux disk motor where the stator and rotor phase angles must be consistent, the stator disks 4 of the dual-stator-single-rotor motor are staggered. By changing the harmonic components of the air gap magnetic field, the transition from single harmonic to double harmonic is achieved, which effectively suppresses electromagnetic force fluctuations and helps reduce vibration during motor operation.

[0044] The permanent magnet is composed of multiple stacked magnetic sheets. When the magnetic flux disk runs at high speed, changes in the magnetic field will induce eddy currents in the permanent magnet, causing the permanent magnet to heat up and reduce transmission efficiency. By designing the permanent magnet into segments and using the isolation plate 16 to block the eddy current path, the eddy current loss is significantly reduced. Secondly, the segmented design can refine the magnetic field control, reduce local magnetic saturation, and improve the uniformity of the magnetic field, thereby improving the smoothness of torque output. Finally, the segmented design can reduce high-order harmonics, thereby reducing vibration and noise.

[0045] By alternating permanent magnets of different sizes, the distribution of magnetic field lines is adjusted by the difference in magnet size, balancing energy output and loss control. The larger first large magnetic sheet 15 and the second large magnetic sheet 18 provide the main magnetic flux, while the smaller first small magnetic sheet 14 and the second small magnetic sheet 17 assist in adjusting the direction of the magnetic field lines, making the magnetic field more uniform and unidirectionally enhanced, similar to a "focusing" effect. This significantly improves the magnetic field strength facing the target area of ​​coil 8 and iron core 9, enhancing the driving effect.

[0046] The spacing between large and small magnets can break the symmetry, and the weak field of the small magnet can buffer the repulsion and attraction of the adjacent large magnet, thereby reducing the overall magnetic resistance and magnetic flux loss. Furthermore, by differentiating the mass distribution, the peak value of the resonant frequency can be dispersed, the vibration amplitude can be reduced, and the stability of the whole machine during operation can be improved.

[0047] The edges of the two stator disks 4 are provided with elastic fixing rods 10. The elastic fixing rods 10 are connected in the middle by a horizontal spring 11, which surrounds the magnetic flux disk and does not contact the magnetic flux disk. Both the fixing rods 10 and the spring 11 are conductors. Relying on the reflection of local eddy currents on the conductor surface and the skin effect, a complete circuit is not required. This has a suppressive effect on the leakage magnetic field and reduces the influence of leakage magnetic field on the device.

[0048] Furthermore, the elastic fixing rod 10 provides primary flexible support, and the transverse spring 11 forms a secondary vibration damping unit. Through the dual-stage structure, vibration energy of different frequencies can be absorbed, thereby improving the stability of the entire device during operation.

[0049] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dual-harmonic parallel motor with phase misalignment, comprising a heat dissipation frame (1), characterized in that, Also includes: Stator disk (4), both stator disks (4) are located inside the heat dissipation frame (1), the two stator disks (4) are arranged coaxially, and they are distributed with a certain angle difference relative to the rotation center in the circumferential direction; A flux disk is disposed inside the heat dissipation frame (1). The flux disk is located between two stator disks (4) and is coaxially arranged with the stator disks (4). The flux disk includes an isolation plate (16). Multiple permanent magnets are provided on both sides of the isolation plate (16). The multiple permanent magnets on the same side of the isolation plate (16) are distributed in a Heilbeck array. The multiple permanent magnets in the same array are directionally magnetized so that the magnetic field energy is concentrated on the side facing the corresponding stator disk (4). The two stator disks (4) are staggered and correspond one-to-one with the permanent magnet arrays on both sides of the isolation plate (16) to form a staggered coupled magnetic field structure.

2. The dual-harmonic parallel motor with phase misalignment according to claim 1, characterized in that, The stator disk (4) includes a mounting frame (5) fixedly connected inside the heat dissipation outer frame (1). Multiple iron cores (9) are fixedly connected inside the mounting frame (5). A coil (8) is wound around the outside of the iron core (9). The iron core (9) and the coil (8) thereon form an electromagnet. Multiple electromagnets are distributed in a circular array inside the mounting frame (5).

3. The dual-harmonic parallel motor with phase misalignment according to claim 2, characterized in that, The mounting frame (5) is ring-shaped, and multiple external fixing posts are fixedly connected to the outer edge, and multiple internal fixing posts are fixedly connected to the inner edge. The multiple external fixing posts and internal fixing posts are distributed in a circular array on the mounting frame (5). External fixing holes (6) are opened on the external fixing posts, and internal fixing holes (7) are opened on the internal fixing posts. External mounting holes and internal mounting holes are opened on the heat dissipation outer frame (1) aligned with the external fixing holes (6) and internal fixing holes (7). The mounting frame (5) and the heat dissipation outer frame (1) are detachably connected by bolt assemblies passing through the holes.

4. The dual-harmonic parallel motor with phase misalignment according to claim 3, characterized in that, The two adjacent outer fixing posts and the two inner fixing posts form a mounting groove, and the multiple electromagnets are located one-to-one inside the multiple mounting grooves, with their outer sides abutting against the fixing posts.

5. The dual-harmonic parallel motor with phase misalignment according to claim 1, characterized in that, The magnetic flux disk includes a fixed frame (13), which is ring-shaped. The isolation plate (16) is fixedly connected inside the fixed frame (13), and a fixing groove for mounting permanent magnets is provided on the fixed frame (13).

6. The dual-harmonic parallel motor with phase misalignment according to claim 5, characterized in that, The fixed frame (13) is coaxially fixedly connected to a rotating shaft inside. A ball bearing (12) is installed on the heat dissipation outer frame (1). The rotating shaft is rotatably connected to the heat dissipation outer frame (1) through the ball bearing (12). A transmission shaft (2) is coaxially fixedly connected to the rotating shaft. A fixing block (3) is fixedly connected to the outside of the heat dissipation outer frame (1). One end of the transmission shaft (2) passes through the heat dissipation outer frame (1) and rotatably engages with the fixing block (3). The other end is connected to the input end of an external device.

7. The dual-harmonic parallel motor with phase misalignment according to claim 1, characterized in that, The permanent magnets include large magnets and small magnets. Multiple large magnets and multiple small magnets on the same side of the isolation plate (16) are arranged in a circular array and are staggered, forming a Heilbeck array together.

8. The dual-harmonic parallel motor with phase misalignment according to claim 7, characterized in that, Both the large magnet and the small magnet are multiple magnetic sheets stacked together. On both sides of the isolation plate (16), the magnetic sheets that make up the small magnet are the first small magnetic sheet (14) and the second small magnetic sheet (17), and the magnetic sheets that make up the large magnet are the first large magnetic sheet (15) and the second large magnetic sheet (18).

9. The dual-harmonic parallel motor with phase misalignment according to claim 3, characterized in that, It also includes a magnetic flux leakage protection component. Multiple magnetic flux leakage protection components are connected between two mounting frames (5). Each magnetic flux leakage protection component includes a spring (11). Both ends of the spring (11) are fixedly connected to a fixing rod (10). The ends of the two fixing rods (10) away from the spring (11) are fixedly connected to the opposite side of the two mounting frames (5).

10. The phase-shifted dual-harmonic parallel motor according to claim 9, characterized in that, The spring (11) and the fixing rod (10) are both elastic conductors, and multiple fixing rods (10) on the same mounting frame (5) are alternately distributed with multiple external fixing posts.

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