Field-modulated lead-screw multi-port generator for wave power

Abstract

The application discloses a field modulation screw multi-port generator for wave power generation and belongs to the technical field of magnetic gears and motors. The application is composed of a field modulation magnetic force screw and a power generation mechanism. A field modulator drives a motor rotor, and a magnetic gear realizes multiple speed-up effects, thereby solving the problems of low power density and high cost of an existing direct-drive wave power generator. On the basis of an axial flux motor, the number of magnetic field pole pairs generated by a first control winding and a second control winding is changed to control the motor rotor, thereby solving the problems of narrow wave capturing range of an existing generator, single adjustment form for different sea conditions, low system power density and low efficiency.

Description

Technical Field

[0001] This invention relates to a multi-port axial flux field modulation generator, specifically to a multi-port field modulation screw axial flux generator for wave power generation, belonging to the field of magnetic gear and motor technology. Background Technology

[0002] Direct-drive wave generators directly convert wave energy into electrical energy, eliminating the need for transmission links and offering advantages such as simple structure, high efficiency, and strong stability. However, the low direct-drive speed of direct-drive wave generators results in low power density. Furthermore, high-power linear generators often exhibit significant positioning forces, affecting motor performance. The low-speed direct drive also leads to bulky and costly motors. In addition, the large variations in wave amplitude and frequency cause frequent and wide fluctuations in the instantaneous output power of direct-drive wave generators, resulting in continuous fluctuations in instantaneous power over short timescales. This superposition of long-term and short-term fluctuations makes stable output difficult. Moreover, existing wave generators can only operate normally within their rated wave speed range, resulting in low wave energy utilization coefficients. A large amount of wave energy is not fully captured and converted, leading to low overall system energy conversion efficiency.

[0003] Based on the above, the problems existing in the prior art are: the inherent mechanical speed of direct-drive wave generators is low, the motor size is large, and the power density is low. Although traditional helical magnetic screws can improve some energy conversion efficiency, the power density of the system is relatively low because there is no speed-increasing effect of magnetic gears. At the same time, existing direct-drive wave generators have a narrow wave capture range, a single adjustment mode to deal with different sea conditions, and low wave energy utilization. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a field-modulated screw multi-port generator for wave power generation. While ensuring reliability and economy, it solves the problem of low power density of direct-drive wave generators, and also solves the problem of low system efficiency caused by the single adjustment mode of existing power generation systems in response to different sea conditions.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a field-modulated screw multi-port generator for wave power generation, mainly composed of a field-modulated magnetic screw and a generator, including a rotating shaft, electrical steel, non-magnetic material, an outer annular permanent magnet, an inner screw permanent magnet, a stator shell, stator core I, stator core II, rotor core I, rotor core II, generator winding I, permanent magnet I, a first control winding, a modulator, generator winding II, a second control winding, permanent magnet II, and bearings;

[0006] In the field-modulated magnetic lead screw section, the inner lead screw permanent magnet is installed outside the rotating shaft and rotates around the rotating shaft, while the outer ring permanent magnet is stationary, and the electrical steel and non-magnetic materials move in a straight line under the action of waves.

[0007] In the generator section, the stator housing is connected to stator core I and stator core II, and is in a stationary state. Stator core I is equipped with generator winding I. Permanent magnet I and a first control winding are respectively installed on both axial sides of rotor core I. Rotor core I is connected to the shaft and rotates. Stator core II, from the inside out along the radial direction, consists of a modulator and generator winding II. Rotor core II, from the inside out along the radial direction, consists of a bearing, a second control winding, and permanent magnet II.

[0008] The electrical steel and non-magnetic materials mentioned above play a modulation role. For the same axial length, the number of pole pairs of the outer annular permanent magnet is N. so The number of pole pairs of the internal lead screw permanent magnet is N. si The number of electrical steel pieces is N. st The magnetic flux density generated by the outer ring permanent magnet in the axial direction is B. zo (r,z), which is calculated by (1):

[0009]

[0010] In equation (1), the magnetic flux density generated by the outer ring permanent magnet in the axial direction is B. zo (r,z), containing B zo11 B zo12 and B zo13 Three components, Λ(z) is the total axial permeability, F zo (r,z) represents the total axial magnetomotive force, Λ0 and Λ m Let be the amplitudes of the average component and the alternating component of the magnetic permeability, respectively, where t is time and z is the amplitude. so and z st These represent the axial positions of the outer ring permanent magnet and the electrical steel, respectively, F. 2m v is the magnetomotive force amplitude generated by the outer ring permanent magnet. st Let v be the linear velocity of the electrical steel in the axial direction. so The linear axial velocity of the outer ring permanent magnet is given by the magnetic field component B. zo12 It can be seen that when N st =N so +N si At this time, the magnetic fields generated by the outer ring permanent magnet and the inner screw permanent magnet are coupled to each other, which is the basic theory of magnetic field modulation.

[0011] The outer ring permanent magnet is fixed, and the electrical steel moves in a straight line along the axial direction under the action of waves. Therefore, the inner lead screw permanent magnet moves in a straight line under the action of the magnetic field. However, since the inner lead screw permanent magnet is fixed on the rotating shaft in this invention, it cannot move in a straight line. But the inner lead screw permanent magnet can generate the effect of axial movement of the magnetic field when rotating. Therefore, the inner lead screw permanent magnet can rotate under the action of the magnetic field.

[0012] The lead of the internal lead screw permanent magnet is λ, and the movement speed of the internal lead screw permanent magnet and the electrical steel satisfies: The rotational speed of the internal lead screw permanent magnet is derived to satisfy: Therefore, when N st >N si At this time, the internal lead screw permanent magnet can rotate at high speed, which can convert the low-speed linear motion of the electrical steel into the high-speed rotational motion of the internal lead screw permanent magnet, forming a magnetic gear effect.

[0013] Both the outer annular permanent magnet and the inner lead screw permanent magnet adopt the Halbach magnetization method to further improve the power density;

[0014] The outer ring permanent magnet is stationary, the electric steel is connected to the float, and under the action of wave force, it moves linearly along the axis within the displacement distance, while the inner screw permanent magnet rotates at high speed, transmitting power to the generator part;

[0015] Both stator core I and stator core II are connected to the stator housing and are in a stationary state. The rotating shaft is connected to rotor core I. When rotor core I and rotating shaft rotate in a circumferential motion, generator winding I serves as the basic generator port to output electrical energy.

[0016] The permanent magnet I and the first control winding are respectively installed on both sides of the rotor core I, and are located on the radial outer side and radial inner side of the rotor core I, respectively.

[0017] The rotor core I has a hollowed-out radial center and is connected to the radially outer core section by a support rod. This is to reduce the overall mass of the rotor and improve the dynamic response performance of the system.

[0018] The stator core II is equipped with a modulator and a generator winding II from the inside to the outside along the radial direction;

[0019] The rotor core II is equipped with a bearing, a second control winding and a permanent magnet II from the inside to the outside along the radial direction. The rotor core II can rotate around the shaft or be stationary.

[0020] The first control winding generates a magnetic field with N pole pairs. ko The modulator has N teeth. kt The number of pole pairs in the second control winding is N.ki The magnetic flux density of the first control winding in the circumferential direction is B. ri (r,θ), which is calculated by (2):

[0021]

[0022] In equation (2), the magnetic flux density B of the first control winding in the circumferential direction is... ri (r,θ) contains B ri11 B ri12 and B ri13 Three components, Λ(θ) is the total circumferential permeability, F θi (r,θ) represents the total circumferential magnetomotive force, Λ0 and Λ m These are the amplitudes of the average component and the alternating component of the magnetic permeability, respectively. and These represent the relative positions of the magnetic field generated by the first control winding in the circumferential direction and the relative position of the modulator, respectively, where t is time and F is the magnetic field. 1m ω is the amplitude of the magnetomotive force of the magnetic field generated by the first control winding. kt Let ω be the angular velocity of the modulator in the circumferential direction. ko The rotational angular velocity of the magnetic field generated by the first control winding in the circumferential direction is determined by the magnetic field component B. ri12 It can be seen that when N kt =N ko +N ki At that time, the magnetic fields generated by the first control winding and the second control winding are coupled to each other;

[0023] The rotational angular velocities of the first control winding and the second control winding satisfy:

[0024] The first and second control windings, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko >N ki When, then ω ki >ω ko That is, the rotational speed of the second control winding is greater than the rotational speed of the first control winding, that is, the rotational speed of rotor core II is greater than the rotational speed of rotor core I.

[0025] The first and second control windings, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko =N ki When, ω ki =ω ko That is, the rotational speed of rotor core II is equal to the rotational speed of rotor core I;

[0026] The first and second control windings, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko <N ki When, ω ki <ω ko That is, the rotational speed of rotor core II is less than the rotational speed of rotor core I;

[0027] The first control winding, the second control winding, and the modulator form an electromagnetic controller. When the rotational speeds of the first control winding and the second control winding are different, the electromagnetic controller forms a magnetic gear effect.

[0028] The first control winding, the second control winding, and the modulator can adjust the number of magnetic field pole pairs generated by the first control winding and the second control winding according to different sea conditions. When the waves are small, the first control winding or the second control winding does not carry current. At this time, only the power generation winding I serves as the basic power generation port to output electrical energy.

[0029] As the waves increase, the first and second control windings generate a magnetic field with a pole pair number that satisfies N. kt =N ko +N ki In this case, increase the number N of magnetic field pole pairs of the first control winding. ko Reduce the number of magnetic field pole pairs N of the second control winding ki At this time, the basic power generation port and the auxiliary power generation port work simultaneously, and the rotational speed of rotor core II continues to increase, thus increasing the power density of the generator.

[0030] The beneficial effects of this invention are:

[0031] 1. This invention proposes a generator structure based on magnetic gear speed increase. First, in the magnetic lead screw section, the field-modulated magnetic lead screw not only converts linear motion into rotational motion but also achieves the speed increase effect of a magnetic gear. Compared with traditional linear motors, this invention improves the generator's power density and output stability. Simultaneously, the use of electrical steel and non-magnetic materials as linear movers, along with increased displacement distance, significantly reduces mover complexity and mass, thereby reducing inertia and increasing the system's dynamic response performance. Furthermore, the toroidal Halbach magnetized permanent magnet used in this invention increases the air gap magnetic flux density, further increasing the motor's power density, which is of significant importance and practical value.

[0032] 2. The motor portion of this invention controls the basic power generation port and auxiliary power generation port via an electromagnetic controller. By controlling the current in the first and second control windings, the number of power generation execution ports of the multi-port motor can be adjusted. Simultaneously, by adjusting the magnetic fields generated by the first and second control windings, a magnetic gear is formed to further control the rotor rotation speed of the generator and increase the motor power density. This allows the generator's operating state to be changed to adapt to different sea conditions, further improving the device's ability to capture wave energy and enhancing the energy conversion efficiency and adaptability of the direct-drive wave power generation system to different wave conditions.

[0033] 3. This invention employs a set of magnetic field-modulated gears in both the lead screw and generator sections. Therefore, compared to traditional linear generators, this system has stronger overload capacity, higher power density, lower maintenance costs, and higher cleanliness, making it particularly suitable for applications with high maintenance costs, such as deep-sea wave power generation. Furthermore, traditional linear motors are large and expensive; this invention increases motor power density while reducing motor size, lowering production costs, and simultaneously improving the conversion efficiency from wave energy to electrical energy. This invention can achieve continuous and stable power supply to deep-sea islands and reefs, and can also provide technical support for special power supply for military facilities, becoming a stable and concealed source of electrical supplementation for fixed points beneath the sea surface. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 yes Figure 1 A three-dimensional sectional view of the lead screw section;

[0036] Figure 3 yes Figure 2 A partial schematic diagram of the lead screw permanent magnet inner rotor;

[0037] Figure 4 yes Figure 1 A partial schematic diagram of the generator section;

[0038] Figure 5 yes Figure 4 Three-dimensional exploded view of the generator in the axial directions AB and BA;

[0039] In the diagram: 1. Shaft; 2. Electrical steel; 3. Non-magnetic material; 4. Outer ring permanent magnet; 4-1. Outer ring permanent magnet I; 4-2. Outer ring permanent magnet II; 4-3. Outer ring permanent magnet III; 4-4. Outer ring permanent magnet IV; 5. Inner leadscrew permanent magnet; 5-1. Inner leadscrew permanent magnet I; 5-2. Inner leadscrew permanent magnet II; 5-3. Inner leadscrew permanent magnet III; 5-4. Inner leadscrew permanent magnet IV; 6. Stator housing; 7. Stator core I; 8. Stator core II; 9. Rotor core I; 10. Rotor core II; 11. Generator winding I; 12. Support rod; 13. Permanent magnet I; 14. First control winding; 15. Modulator; 16. Generator winding II; 17. Second control winding; 18. Permanent magnet II; 19. Bearing. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0041] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0042] In this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0043] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figure 1-5 This application will be described in detail with reference to the embodiments.

[0046] Example: See Figures 1 to 5 This embodiment describes a field-modulated screw multi-port generator for wave power generation.

[0047] The components include: 1. Rotating shaft; 2. Electrical steel; 3. Non-magnetic material; 4. Outer annular permanent magnet; 5. Inner lead screw permanent magnet; 6. Stator housing; 7. Stator core I; 8. Stator core II; 9. Rotor core I; 10. Rotor core II; 11. Generating winding I; 12. Support rod; 13. Permanent magnet I; 14. First control winding; 15. Modulator; 16. Generating winding II; 17. Second control winding; 18. Permanent magnet II; and 19. Bearing.

[0048] Additionally, according to one implementation method, see [link to implementation details]. Figure 1 The inner lead screw permanent magnet 5 is installed outside the rotating shaft 1 and rotates around the rotating shaft 1, while the outer annular permanent magnet 4 is stationary, and the electrical steel 2 and the non-magnetic material 3 move in a straight line under the action of waves.

[0049] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 The electrical steel 2 and the non-magnetic material 3 play a modulation role. The outer annular permanent magnet 4 has N pole pairs along the same axial length. so The number of pole pairs of the internal lead screw permanent magnet is 5 N. si The number of electrical steel 2 is N. st The magnetic flux density generated by the outer annular permanent magnet 4 in the axial direction is B. zo (r,z), which is calculated by (1):

[0050]

[0051] In equation (1), the magnetic flux density generated by the outer annular permanent magnet 4 in the axial direction is B. zo (r,z), containing B zo11 B zo12 and B zo13 Three components, Λ(z) is the total axial permeability, F zo (r,z) represents the total axial magnetomotive force, Λ0 and Λ m Let be the amplitudes of the average component and the alternating component of the magnetic permeability, respectively, where t is time and z is the amplitude. so and z st The axial positions of the outer annular permanent magnet 4 and the electrical steel 2 are respectively, F. 2m v is the magnetomotive force amplitude generated by the outer ring permanent magnet 4. st Let v be the linear velocity of electrical steel 2 in the axial direction. so The linear axial velocity of the outer ring permanent magnet 4 is determined by the magnetic field component B. zo12 It can be seen that when N st =N so +N si At that time, the magnetic fields generated by the outer ring permanent magnet 4 and the inner screw permanent magnet 5 are coupled to each other, which is the basic theory of magnetic field modulation.

[0052] Additionally, according to one implementation method, see [link to implementation details]. Figure 1 and Figure 2 The outer annular permanent magnet 4 is fixed, and the electrical steel 2 moves linearly along the axial direction under the action of waves. Therefore, the inner lead screw permanent magnet 5 moves linearly under the action of the magnetic field. However, since the inner lead screw permanent magnet 5 is fixed on the rotating shaft 1 in this invention, it cannot move linearly. But the inner lead screw permanent magnet 5 can generate the effect of axial movement of the magnetic field when rotating. Therefore, the inner lead screw permanent magnet 5 can rotate under the action of the magnetic field.

[0053] Additionally, according to one implementation method, see [link to implementation details]. Figure 3 The lead of the internal lead screw permanent magnet 5 is λ, and the movement speed of the internal lead screw permanent magnet 5 and the electrical steel 2 satisfies: The rotational speed of the internal lead screw permanent magnet 5 is derived to satisfy: Therefore, when N st >N si At that time, the internal lead screw permanent magnet 5 can rotate at high speed, which can convert the low-speed linear motion of the electrical steel 2 into the high-speed rotational motion of the internal lead screw permanent magnet 5, forming a magnetic gear effect.

[0054] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 The outer annular permanent magnet 4 and the inner lead screw permanent magnet 5 both adopt the Halbach magnetization method to further improve the power density;

[0055] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 and Figure 3 The outer ring permanent magnet 4 is stationary, the electric steel 2 is connected to a float, and under the action of wave force, it moves linearly along the axial direction within the displacement distance. The inner screw permanent magnet 5 rotates at high speed, transmitting power to the generator part.

[0056] Additionally, according to one implementation method, see [link to implementation details]. Figure 4 and Figure 5 In the generator section, the stator housing 6 is connected to stator core I 7 and stator core II 8 and is in a stationary state. Stator core I 7 is equipped with a generator winding I 11. Permanent magnet I 13 and a first control winding 14 are respectively installed on both axial sides of rotor core I 9. Rotor core I 9 is connected to shaft 1 and rotates. Stator core II 8, from the inside out along the radial direction, consists of a modulator 15 and a generator winding II 16. Rotor core II 10, from the inside out along the radial direction, consists of a bearing 19, a second control winding 17, and a permanent magnet II 18.

[0057] Additionally, according to one implementation method, see [link to implementation details]. Figure 4 and Figure 5 The stator core I 7 and stator core II 8 are both connected to the stator housing 5 and are in a stationary state. The rotating shaft 1 is connected to the rotor core I 9. When the rotor core I 9 and the rotating shaft 1 rotate in a circumferential motion, the power generation winding I 111 serves as the basic power generation port to output electrical energy.

[0058] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The permanent magnet I13 and the first control winding 14 are respectively installed on both sides of the rotor core I9, and are located on the radial outer side and radial inner side of the rotor core I9, respectively.

[0059] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The rotor core I 9 has a hollowed-out radial center and is connected to the radially outer core part by a support rod 12. This is to reduce the overall mass of the rotor and improve the dynamic response performance of the system.

[0060] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The stator core II 8 is equipped with a modulator 15 and a generator winding II 16 respectively from the inside to the outside in the radial direction;

[0061] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The rotor core II 10 is equipped with a bearing 19, a second control winding 17 and a permanent magnet II 18 respectively from the inside to the outside in the radial direction. The rotor core II 10 can rotate around the rotating shaft 1 in a circumferential motion or be in a stationary state.

[0062] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The number of magnetic field pole pairs generated by the first control winding 14 is N. ko The modulator 15 has N teeth. kt The number of pole pairs of the second control winding 17 is N. ki The magnetic flux density of the first control winding 14 in the circumferential direction is B. ri (r,θ), which is calculated by (2):

[0063]

[0064] In equation (2), the magnetic flux density B of the first control winding 14 in the circumferential direction is... ri (r,θ) contains B ri11 B ri12 and B ri13 Three components, Λ(θ) is the total circumferential permeability, F θi (r,θ) represents the total circumferential magnetomotive force, Λ0 and Λ m These are the amplitudes of the average component and the alternating component of the magnetic permeability, respectively. and These represent the relative positions of the magnetic field generated by the first control winding 14 in the circumferential direction and the relative position of the modulator 15, respectively, where t is time and F is the magnetic field. 1m ω is the amplitude of the magnetomotive force of the magnetic field generated by the first control winding 14. kt ω is the angular velocity of the modulator 15 in the circumferential direction. ko The rotational angular velocity of the magnetic field generated by the first control winding 14 in the circumferential direction is determined by the magnetic field component B. ri12 It can be seen that when N kt =N ko +N ki At that time, the magnetic fields generated by the first control winding 14 and the second control winding 17 are coupled to each other;

[0065] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The rotational angular velocities of the first control winding 14 and the second control winding 17 satisfy:

[0066] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14 and the second control winding 17, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko >N ki When, then ω ki >ω koThat is, the rotational speed of the second control winding 17 is greater than the rotational speed of the first control winding 14, and the rotational speed of the rotor core II 10 is greater than the rotational speed of the rotor core I 9.

[0067] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14 and the second control winding 17, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko =N ki When, ω ki =ω ko That is, the rotational speed of rotor core II 19 is equal to the rotational speed of rotor core I 9;

[0068] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14 and the second control winding 17, when their wiring configuration is adjusted so that the number of magnetic field pole pairs generated by the windings satisfies N... ko <N ki When, ω ki <ω ko That is, the rotational speed of rotor core II 19 is less than the rotational speed of rotor core I 9;

[0069] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14, the second control winding 17 and the modulator 15 form an electromagnetic controller. When the rotation speeds of the first control winding 14 and the second control winding 17 are different, the electromagnetic controller forms a magnetic gear effect.

[0070] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14, the second control winding 17 and the modulator 15 can adjust the number of magnetic field pole pairs generated by the first control winding 14 and the second control winding 17 according to different sea conditions. When the waves are small, the first control winding 14 or the second control winding 17 does not carry current. At this time, only the power generation winding I11 serves as the basic power generation port to output electrical energy.

[0071] Additionally, according to one implementation method, see [link to implementation details]. Figure 5 The first control winding 14 and the second control winding 17, as the waves increase, ensure that the number of magnetic field pole pairs generated by the windings satisfies N. kt =N ko +N ki In this case, increase the number N of magnetic field pole pairs of the first control winding 14. ko Reduce the number of magnetic field pole pairs N of the second control winding 17. kiAt this time, the basic power generation port and the auxiliary power generation port work simultaneously, and the rotational speed of rotor core II 10 continues to increase, thus increasing the power density of the generator.

[0072] While the embodiments disclosed in this invention are as described above, their content is merely for the purpose of facilitating understanding of the technical solutions of this invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and changes to the form and details of the implementation without departing from the core technical solutions disclosed in this invention; however, the scope of protection defined by this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A field-modulated screw multi-port generator for wave power generation, characterized in that: Includes a rotating shaft (1), electrical steel (2), non-magnetic material (3), outer ring permanent magnet (4), inner lead screw permanent magnet (5), stator shell (6), stator core I (7), stator core II (8), rotor core I (9), rotor core II (10), generator winding I (11), support rod (12), permanent magnet I (13), first control winding (14), modulator (15), generator winding II (16), second control winding (17), permanent magnet II (18), and bearing (19); The inner lead screw permanent magnet (5) is fixedly installed outside the rotating shaft (1) and drives the rotating shaft (1) to rotate. The outer ring permanent magnet (4) is stationary. The electrical steel (2) and non-magnetic material (3) move in a straight line under the action of waves. The stator shell (6) is connected to the stator core I (7) and stator core II (8) and is in a stationary state. The stator core I (7) is equipped with the generator winding I (11). The rotor core I (9) is equipped with permanent magnet I (13) and the first permanent magnet I (14) on both sides of the axial direction. A control winding (14) is connected to the rotor core I (9) and the shaft (1) to rotate. The rotor core I (9) is hollowed out in the radial middle and connected to the outer core part by the support rod (12). The stator core II (8) consists of a modulator (15) and a generator winding II (16) in the radial direction from the inside to the outside. The rotor core II (10) consists of a bearing (19), a second control winding (17), and a permanent magnet II (18) in the radial direction from the inside to the outside. The first control winding (14), modulator (15), and second control winding (17) form an electromagnetic controller. By changing the number of magnetic field pole pairs generated by the first control winding (14) and the second control winding (17), the rotation speed of the rotor core II (10) can be controlled.

2. A field-modulated screw multi-port generator for wave power generation according to claim 1, characterized in that: The number of pole pairs of the outer annular permanent magnet (4) is The number of pole pairs of the internal lead screw permanent magnet (5) is The number of electrical steel (2) is Within the same axial length, satisfying ,and Both the outer ring permanent magnet (4) and the inner screw permanent magnet (5) adopt the Halbach magnetization method.

3. A field-modulated screw multi-port generator for wave power generation according to claim 1, characterized in that: The number of magnetic field pole pairs generated by the first control winding (14) is The modulator (15) has the following number of teeth: The number of pole pairs of the second control winding (17) is ,satisfy: .

4. A field-modulated screw multi-port generator for wave power generation according to claim 3, characterized in that: The generator winding I (11) and permanent magnet I (13) constitute the basic generator, and the generator winding I (11) generates the basic generator port; the generator winding II (16) and permanent magnet II (18) constitute the auxiliary generator, and the generator winding II (16) generates the auxiliary generator port; the electromagnetic controller composed of the first control winding (14), modulator (15) and second control winding (17) can work in different modes according to different sea conditions; When the waves are small, there is no current in the first control winding (14) or the second control winding (17), and only the base generator works, with the base generator outputting electrical energy; as the waves gradually increase, while satisfying the requirements... Under the condition of adjusting the magnetic field generated by the first control winding (14) and the second control winding (17), the number of pole pairs of the magnetic field generated by the first control winding (14) is increased. Gradually increase the number of magnetic field pole pairs generated by the second control winding (17). As the speed of the rotor core II (10) gradually increases according to the magnetic field modulation theory, the power density of the motor gradually increases and the utilization rate of the waves increases.

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