Magnetized dual-stator magnetic gear compound motor

Abstract

The present invention discloses a magnetizing dual-stator magnetic gear compound motor. The motor comprises an outer stator, a rotor, an inner stator, and a magnetic tuning ring. The magnetic tuning ring is fixedly mounted on the outer side of the inner stator, while the outer stator is fixedly mounted on the outer side of the magnetic tuning ring. The rotor is rotatably disposed between the outer stator and the magnetic tuning ring. Multiple windings are disposed within the inner stator. The magnetic tuning ring includes multiple magnetic tuning blocks, each spaced apart along the circumference of the inner stator to form an annular space between the inner stator and the rotor for modulating the magnetic field. This invention addresses the technical issues of complex structures, high energy consumption, and fragility in ship propulsion systems.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a magnetized dual-stator magnetic gear composite motor. Background Art

[0002] The electric motor is a core component in a ship's propulsion system. Currently, ship propulsion systems often use a mechanical gearbox to convert the motor's high-speed output motion into a low-speed, high-torque motion to drive the propeller, thereby generating propulsion for the ship. Due to the mechanical gearbox's location, it must be installed between the motor and the propeller, significantly increasing the complexity of the entire system. Furthermore, when the mechanical gearbox is operating, friction creates additional energy consumption, reducing drive efficiency. Furthermore, because the components within the mechanical gearbox utilize contact transmission, they are prone to damage during operation, resulting in poor reliability. This can require frequent maintenance by personnel over a short period of time, increasing their workload and impacting the ship's normal operations.

[0003] There is currently no effective solution to the problems of complex structure, high energy consumption and easy damage of ship propulsion systems in related technologies.

[0004] Therefore, the inventors, relying on their many years of experience and practice in related industries, have proposed a magnetized dual-stator magnetic gear composite motor to overcome the defects of the prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a magnetized dual-stator magnetic gear compound motor that can provide a low-speed, high-torque drive mode, has the advantages of compact structure, low loss, and high reliability, can improve the efficiency of the propulsion system, has a wide range of applications, and is particularly suitable for providing propulsion for ships.

[0006] The present invention can be implemented by adopting the following technical solutions:

[0007] The present invention provides a magnetizing dual-stator magnetic gear compound motor, which includes an outer stator, a rotor, an inner stator and a magnetic adjustment ring, wherein:

[0008] The magnetic adjustment ring is fixedly sleeved on the outer side of the inner stator, the outer stator is fixedly sleeved on the outer side of the magnetic adjustment ring, the rotor is rotatably arranged between the outer stator and the magnetic adjustment ring, and a plurality of windings are arranged inside the inner stator;

[0009] The magnetic tuning ring includes a plurality of magnetic tuning blocks, and the magnetic tuning blocks are arranged at intervals along the circumference of the inner stator to form an annular space between the inner stator and the rotor for modulating the magnetic field.

[0010] In a preferred embodiment of the present invention, the magnetic tuning block is formed by stacking and pressing a plurality of silicon steel sheets with magnetic conductivity.

[0011] In a preferred embodiment of the present invention, the outer stator, the rotor and the inner stator are all cylindrical structures, and the outer stator, the rotor, the inner stator and the magnetic tuning ring are coaxially arranged, and annular air gaps are reserved between the rotor and the outer stator, between the rotor and the magnetic tuning ring, and between the magnetic tuning ring and the inner stator.

[0012] In a preferred embodiment of the present invention, the radial width of the air gap between the rotor and the outer stator, the radial width of the air gap between the rotor and the magnetic tuning ring, and the radial width of the air gap between the magnetic tuning ring and the inner stator are all less than or equal to 0.6 mm.

[0013] In a preferred embodiment of the present invention, a plurality of accommodating cavities are formed inside the inner stator along its circumference, and a plurality of openings are opened on the outer wall of the inner stator along its circumference, each of the openings is connected to the corresponding accommodating cavity, and each of the windings is respectively arranged in the corresponding accommodating cavity.

[0014] In a preferred embodiment of the present invention, the rotor includes a plurality of tangentially magnetized magnetic steels and a plurality of magnetic conductive blocks having magnetic conductivity, wherein the magnetic steels and the magnetic conductive blocks are alternately arranged along the circumferential direction and connected to form a cylindrical structure;

[0015] Each of the magnetic conductive blocks is formed by stacking and pressing a plurality of silicon steel sheets with magnetic conductive properties.

[0016] In a preferred embodiment of the present invention, the number of the magnetic tuning blocks on the magnetic tuning ring satisfies the following relationship:

[0017] P r +P s =Q;

[0018] Where: P r is the number of magnetic pole pairs on the rotor; P s is the number of pole pairs of the inner stator; Q is the number of magnetic blocks on the magnetic regulating ring.

[0019] In a preferred embodiment of the present invention, the number of pole pairs of each magnetic steel on the rotor satisfies the following relationship:

[0020] 60f=P r Ω;

[0021] Where: f is the frequency of the alternating current passed through the winding in the inner stator; P r is the number of pole pairs of each magnetic steel on the rotor; Ω is the rotational speed of the rotor.

[0022] In a preferred embodiment of the present invention, a plurality of grooves are formed on the inner wall of the outer stator along the circumferential direction, and the number of the grooves satisfies the following relationship:

[0023] Q o =Q;

[0024] Where: Q o is the number of grooves; Q is the number of magnetic blocks on the magnetic adjustment ring.

[0025] In a preferred embodiment of the present invention, the angle formed between the center point of the cross section of the magnetic tuning ring and the center points of the cross sections of two adjacent grooves located on both sides of the magnetic tuning ring in the circumferential direction satisfies the following relationship:

[0026] α=n(π / Q);

[0027] Wherein: α is the angle formed between the center point of the cross section of the magnetic tuning ring and the center points of the cross sections of two adjacent grooves located on both sides of the magnetic tuning ring in the circumferential direction.

[0028] In a preferred embodiment of the present invention, each of the windings is connected to a DC bus through a transmission line, an inverter is provided on the transmission line, the axis of the rotor is connected to one end of the output shaft, and a propeller is provided at the other end of the output shaft.

[0029] As described above, the characteristics and advantages of the magnetizing dual-stator magnetic gear compound motor of the present invention are: a magnetic tuning ring is disposed on the outer fixed sleeve of the inner stator, an outer stator is disposed on the outer fixed sleeve of the magnetic tuning ring, and a rotor is rotatably disposed between the outer stator and the magnetic tuning ring, thereby forming an annular space between the inner stator and the rotor for modulating the magnetic field. The magnetic tuning ring and the outer stator modulate the magnetic field and generate specific harmonics. Furthermore, the interaction between the rotor magnetic field and the magnetic fields generated by the windings in the inner stator achieves magnetization. Therefore, by modulating the magnetic field, the magnetizing dual-stator magnetic gear compound motor of the present invention can generate low-speed, high-torque output power within a certain electrical frequency range, eliminating the need for traditional mechanical gearboxes on ships and improving the efficiency and reliability of ship propulsion systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The following drawings are only intended to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0031] in:

[0032] Figure 1 : It is a cross-sectional schematic diagram of the magnetized dual-stator magnetic gear compound motor of the present invention.

[0033] Figure 2: It is a cross-sectional schematic diagram of the outer stator in the magnetized dual-stator magnetic gear compound motor of the present invention.

[0034] Figure 3 : It is a schematic cross-sectional view of the rotor in the magnetized dual-stator magnetic gear compound motor of the present invention.

[0035] Figure 4 : It is a schematic cross-sectional view of the inner stator in the magnetized dual-stator magnetic gear compound motor of the present invention.

[0036] Figure 5 : It is a schematic diagram of the connection structure of the magnetized dual-stator magnetic gear compound motor under working state of the present invention.

[0037] The accompanying drawings in the present invention are:

[0038] 1. External stator; 101. Groove;

[0039] 2. Rotor; 201. Magnetic steel;

[0040] 202, magnetic block; 3, inner stator;

[0041] 301. Accommodation cavity; 302. Opening;

[0042] 4. Magnetic ring; 5. Winding;

[0043] 6. DC bus; 7. Inverter;

[0044] 8. Output shaft; 9. Propeller;

[0045] 10. Transmission lines. DETAILED DESCRIPTION

[0046] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described with reference to the accompanying drawings.

[0047] like Figures 1 to 4As shown, the present invention provides a magnetizing dual-stator magnetic gear compound motor, which includes an outer stator 1, a rotor 2, an inner stator 3 and a magnetic tuning ring 4. The outer stator 1, the rotor 2 and the inner stator 3 are all cylindrical structures. The magnetic tuning ring 4 is fixedly sleeved on the outside of the inner stator 3, the outer stator 1 is fixedly sleeved on the outside of the magnetic tuning ring 4, the rotor 2 is rotatably arranged between the outer stator 1 and the magnetic tuning ring 4, and a plurality of windings 5 are arranged inside the inner stator 3; wherein the magnetic tuning ring 4 includes a plurality of magnetic tuning blocks, each of which is arranged at intervals along the circumference of the inner stator 3 to form an annular space between the inner stator 3 and the rotor 2 for modulating the magnetic field. By setting the magnetic modulation ring 4 and the outer stator 1, the magnetic field can be modulated and specific harmonics can be generated. In addition, since the magnetic field generated by the rotor 2 interacts with the magnetic field generated by each winding 5 in the inner stator 3, the purpose of magnetization can be achieved, so that the magnetization-type dual-stator magnetic gear compound motor of the present invention can generate low-speed and high-torque output power within a certain electrical frequency range, thereby eliminating the traditional mechanical gearbox on the ship and improving the efficiency and reliability of the ship's propulsion system.

[0048] In an optional embodiment of the present invention, Figure 5 As shown, each winding 5 is connected to a DC bus 6 via a transmission line 10. An inverter 7 is provided on the transmission line 10. The axis of the rotor 2 is connected to one end of an output shaft 8, the other end of which is provided with a propeller 9. The inverter 7 converts the DC power output from the DC bus 6 into AC power and supplies it to each winding 5. The magnetic field generated by each winding 5 in the inner stator 3 drives the rotor 2 to rotate, which in turn drives the propeller 9 to rotate, generating the propulsion force required for the ship's propulsion, thus achieving the conversion from electrical energy to mechanical energy. In the present invention, only the rotor 2 is connected to the propeller 9 via the output shaft 8. The remaining components (i.e., the inner stator 3, the magnetic ring 4, and the outer stator 1) are all stationary. During operation, energy exchange is required between the windings 5 of the inner stator 3. Electrical energy is input from the windings 5 and converted into mechanical energy on the rotor 2, driving the propeller 9 to rotate, thereby propelling the ship forward. The present invention is particularly suitable for low-speed direct-drive ship propulsion systems, but is also applicable to other high-efficiency, low-speed direct-drive propulsion systems.

[0049] Furthermore, the magnetic tuning block is formed by stacking and pressing a plurality of silicon steel sheets with magnetic conductivity.

[0050] Furthermore, the winding 5 is a three-phase winding.

[0051] Specifically, such as Figure 1 As shown, the outer stator 1, the rotor 2, the inner stator 3 and the magnetic tuning ring 4 are coaxially arranged, and air gaps with circular cross-sections are reserved between the rotor 2 and the outer stator 1, between the rotor 2 and the magnetic tuning ring 4, and between the magnetic tuning ring 4 and the inner stator 3.

[0052] Preferably, the radial width of the air gap between the rotor 2 and the outer stator 1, the radial width of the air gap between the rotor 2 and the magnetic tuning ring 4, and the radial width of the air gap between the magnetic tuning ring 4 and the inner stator 3 are all less than or equal to 0.6 mm.

[0053] Specifically, such as Figure 1 、 Figure 4 As shown, a plurality of accommodating cavities 301 are formed inside the inner stator 3 along its circumference. The cross section of the accommodating cavity 301 is fan-shaped, and a plurality of openings 302 are opened on the outer wall of the inner stator 3 along its circumference. Each opening 302 is connected to the corresponding accommodating cavity 301, and each winding 5 is respectively arranged in the corresponding accommodating cavity 301.

[0054] In an optional embodiment of the present invention, Figure 1 、 Figure 3 As shown, the rotor 2 includes a plurality of tangentially magnetized magnetic steels 201 and a plurality of magnetic conductive blocks 202 having magnetic conductivity. The magnetic steels 201 and the magnetic conductive blocks 202 are alternately arranged along the circumferential direction and connected to form a cylindrical structure.

[0055] Furthermore, each magnetic conductive block 202 is formed by stacking and pressing a plurality of silicon steel sheets having magnetic conductive properties.

[0056] In an optional embodiment of the present invention, the number of magnetic adjustment blocks on the magnetic adjustment ring 4 satisfies the following relationship:

[0057] P r +P s =Q;

[0058] Where: P r P is the number of pole pairs of the magnetic steel 201 on the rotor 2; s is the number of pole pairs of the inner stator 3; Q is the number of magnetic blocks on the magnetic adjustment ring 4.

[0059] Further, such as Figure 1 、 Figure 2 As shown, a plurality of grooves 101 are provided on the inner wall of the outer stator 1 along the circumferential direction, and the number of the grooves 101 satisfies the following relationship:

[0060] Q o =Q;

[0061] Where: Q o is the number of grooves 101; Q is the number of magnetic blocks on the magnetic adjustment ring 4.

[0062] In an optional embodiment of the present invention, Figure 1As shown, to generate maximum electromagnetic torque and better convert tidal energy into electrical energy (i.e., the DC power in the DC bus 6 is converted from tidal energy), the angle formed between the center point of the cross section of the magnetic tuning ring 4 and the center points of the cross sections of two adjacent grooves 101 located on either side of the magnetic tuning ring 4 on the circumference is an integer multiple of π / Q. This minimizes the magnetic resistance of the magnetic circuit generated by the permanent magnets (i.e., the magnets 201) on the rotor 2, thereby generating greater electromagnetic torque. The angle formed between the center point of the cross section of the magnetic tuning ring 4 and the center points of the cross sections of two adjacent grooves 101 located on either side of the magnetic tuning ring 4 on the circumference satisfies the following relationship:

[0063] α=n(π / Q);

[0064] Wherein: α is the angle formed between the center point of the cross section of the magnetic tuning ring 4 and the center points of the cross sections of two adjacent grooves 101 located on both sides of the magnetic tuning ring 4 in the circumferential direction; n is an integer multiple.

[0065] In an optional embodiment of the present invention, the number of pole pairs of each magnet 201 on the rotor 2 can be used to determine the frequency of the AC power supplied to the winding 5 in the inner stator 3, thereby generating a low-speed, high-torque output power at this AC power frequency. The number of pole pairs of each magnet 201 on the rotor 2 satisfies the following relationship:

[0066] 60f=P r Ω;

[0067] Where: f is the frequency of the alternating current supplied to the winding 5 in the inner stator 3; P r is the number of pole pairs of each magnet 201 on the rotor 2; Ω is the rotational speed of the rotor 2.

[0068] The magnetized dual-stator magnetic gear compound motor of the present invention modulates the magnetic field to generate low-speed, high-torque output power within a specific electrical frequency range. This eliminates the need for traditional mechanical gearboxes in marine propulsion systems, improving the efficiency and reliability of the propulsion system. During deceleration and braking, the mechanical energy of the propeller 9 is converted into electrical energy and fed back into the DC bus 6. This process, known as regenerative braking mode, helps recover excess energy, thereby improving the vessel's endurance.

[0069] The characteristics and advantages of the magnetized dual-stator magnetic gear compound motor of the present invention are:

[0070] 1. This magnetizing dual-stator magnetic gear compound motor can modulate the magnetic field and generate specific harmonics through the arrangement of the magnetic tuning ring 4 and the outer stator 1. The magnetic field generated by the rotor 2 interacts with the magnetic field generated by each winding 5 in the inner stator 3 to achieve the purpose of magnetization, thereby generating low-speed and high-torque output power, eliminating the traditional mechanical gearbox on the ship and improving the efficiency and reliability of the ship's propulsion system.

[0071] Second, the magnetized dual-stator magnetic gear compound motor converts the physical friction of the mechanical gearbox into air resistance friction between the stator and the rotor, avoiding the additional energy consumption required by the friction between the various transmission components in the mechanical gearbox, thereby greatly reducing unnecessary power loss and effectively improving the efficiency of the ship's propulsion system.

[0072] 3. In this magnetized dual-stator magnetic gear compound motor, there is no direct contact between the outer stator 1, the rotor 2 and the inner stator 3, which avoids the problem of mechanical damage in traditional mechanical gearboxes, thereby effectively extending the service life of the motor and improving the reliability of the motor. It is suitable for long-term ship propulsion systems and can effectively reduce the maintenance frequency of the motor.

[0073] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A magnetized dual-stator magnetic gear compound motor, characterized in that: The magnetized dual-stator magnetic gear compound motor includes an outer stator, a rotor, an inner stator and a magnetic adjustment ring, wherein: The magnetic adjustment ring is fixedly sleeved on the outer side of the inner stator, the outer stator is fixedly sleeved on the outer side of the magnetic adjustment ring, the rotor is rotatably arranged between the outer stator and the magnetic adjustment ring, and a plurality of windings are arranged inside the inner stator; The magnetic tuning ring includes a plurality of magnetic tuning blocks, each of which is arranged at intervals along the circumference of the inner stator to form an annular space between the inner stator and the rotor for modulating the magnetic field; The rotor includes a plurality of tangentially magnetized magnetic steels, and a plurality of grooves are formed on the inner wall of the outer stator along the circumferential direction, and the number of the grooves satisfies the following relationship: Q o =Q; Where: Q o is the number of grooves; Q is the number of magnetic blocks on the magnetic adjustment ring; The angle formed between the center point of the cross section of the magnetic tuning ring and the center points of the cross sections of two adjacent grooves located on both sides of the magnetic tuning ring in the circumferential direction satisfies the following relationship: α=n(π / Q); Wherein: α is the angle formed between the center point of the cross section of the magnetic tuning ring and the center points of the cross sections of the two adjacent grooves located on both sides of the magnetic tuning ring in the circumferential direction; By setting the angle α formed between the center point of the cross section of the magnetic tuning ring and the center points of the cross sections of two adjacent grooves located on both sides of the magnetic tuning ring in the circumferential direction to an integer multiple of π / Q, the magnetic resistance of the magnetic circuit generated by the permanent magnets on the rotor is reduced, thereby generating a larger electromagnetic torque.

2. The magnetized dual-stator magnetic gear compound motor according to claim 1, characterized in that: The magnetic adjustment block is formed by stacking and pressing a plurality of silicon steel sheets with magnetic conductivity.

3. The magnetized dual-stator magnetic gear compound motor according to claim 1, characterized in that: The outer stator, the rotor and the inner stator are all cylindrical structures, and the outer stator, the rotor, the inner stator and the magnetic tuning ring are coaxially arranged. Annular air gaps are reserved between the rotor and the outer stator, between the rotor and the magnetic tuning ring, and between the magnetic tuning ring and the inner stator.

4. The magnetized dual-stator magnetic gear compound motor according to claim 3, characterized in that: The radial width of the air gap between the rotor and the outer stator, the radial width of the air gap between the rotor and the magnetic tuning ring, and the radial width of the air gap between the magnetic tuning ring and the inner stator are all less than or equal to 0.6 mm.

5. The magnetized dual-stator magnetic gear compound motor according to claim 1, characterized in that: A plurality of accommodating cavities are formed inside the inner stator along its circumference, and a plurality of openings are opened on the outer wall of the inner stator along its circumference, each of the openings is communicated with the corresponding accommodating cavity, and each of the windings is respectively arranged in the corresponding accommodating cavity.

6. The magnetized dual-stator magnetic gear compound motor according to claim 1, characterized in that: The rotor includes a plurality of magnetic conductive blocks having magnetic conductivity, and the magnetic steels and the magnetic conductive blocks are alternately arranged along the circumferential direction and connected to form a cylindrical structure; Each of the magnetic conductive blocks is formed by stacking and pressing a plurality of silicon steel sheets with magnetic conductive properties.

7. The magnetized dual-stator magnetic gear compound motor according to claim 6, characterized in that: The number of magnetic adjustment blocks on the magnetic adjustment ring satisfies the following relationship: P r +P s =Q; Where: P r is the number of magnetic pole pairs on the rotor; P s is the number of pole pairs of the inner stator; Q is the number of magnetic blocks on the magnetic regulating ring.

8. The magnetized dual-stator magnetic gear compound motor according to claim 6 or 7, characterized in that: The number of pole pairs of each magnetic steel on the rotor satisfies the following relationship: 60f=P r Oh; Where: f is the frequency of the alternating current passed through the winding in the inner stator; P r is the number of pole pairs of each magnetic steel on the rotor; Ω is the rotational speed of the rotor.

9. The magnetized dual-stator magnetic gear compound motor according to claim 1, characterized in that: Each of the windings is connected to a DC busbar through a transmission line. An inverter is provided on the transmission line. The axis of the rotor is connected to one end of an output shaft, and a propeller is provided at the other end of the output shaft.

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