Wide operating range linear-rotary multi-port generator based on sea conditions

Abstract

The application discloses a wide working field linear-rotary multi-port generator based on sea conditions and belongs to the technical field of magnetic gears and generators. The application is composed of a field modulation magnetic screw rod and a controllable multi-port generator. The field modulation magnetic screw rod converts low-speed linear motion of waves into high-speed rotary motion, thereby improving the power density of the direct-drive wave generator. By arranging a power winding and a control winding, the axial flux generator and the magnetic gear magnetic circuit are coupled, the air gap magnetic density is improved, the power density of the generator and the instantaneous power transmission capacity of the magnetic gear are increased, and the maximum power transmission capacity of the axial flux generator is improved through electric excitation, so that the wave range that can be captured in the working area of the device is effectively widened.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and more specifically to a wide-range linear-rotary multi-port generator based on sea conditions. Background Technology

[0002] Because waves have low vertical velocity and high thrust, traditional direct-drive wave generators suffer from low linear velocity, numerous poles, large size, low power density, and high manufacturing costs. Furthermore, due to significant regional, climatic, and seasonal variations in wave energy, the captureable wave power output fluctuates frequently. Traditional direct-drive wave generators have limited adjustment methods, a narrow power capture range, and low wave utilization, resulting in a large amount of wave energy remaining uncaptured and unconverted, leading to very low overall system energy conversion efficiency. As an effective means to improve generator power density, significantly increasing the generator's rotational speed can effectively enhance its power density.

[0003] Based on the above, the problems existing in the prior art are: the mechanical speed of direct-drive wave generators is low, the power density is low, and at the same time, the wave capture range of existing direct-drive wave generators is narrow, the adjustment mode to cope with different sea conditions is limited, and the wave energy utilization rate is low. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a wide-range linear-rotary multi-port generator based on sea conditions. 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 narrow power capture range 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:

[0006] A wide-range linear-rotary multi-port generator based on sea state mainly consists of a field-modulated magnetic screw and a generator, including a field-modulated magnetic screw, a generator, a stator, rotor I, rotor II, stator II, a DC excitation winding, a generator winding I, rotor core I, rotor core II, generator winding II, rotor I-axially magnetized permanent magnet, rotor I-tangentially magnetized permanent magnet, a shaft, bearings, connecting rods, rotor II-axially magnetized permanent magnet, and rotor II-tangentially magnetized permanent magnet.

[0007] As a further improvement of the present invention, the stator I slot contains two sets of windings, the lower winding is a DC excitation winding, the upper winding is a generator winding I, the rotor I is rigidly connected to the shaft through a connecting rod, the rotor II is connected to the shaft through a bearing, and the stator II slot contains a generator winding II.

[0008] As a further improvement of the present invention, the rotor core I is made of a high-permeability material such as DT4C. Rotor I-axial magnetized permanent magnets and rotor I-tangential magnetized permanent magnets are arranged between the rotor cores I. Each rotor I-axial magnetized permanent magnet and two rotor I-tangential magnetized permanent magnets form one pole of rotor I. This arrangement can enhance the air gap magnetic flux density between the stator I and rotor II adjacent to rotor I. The number of teeth of rotor core I is equal to the number of poles of rotor I. The rotor II-axial magnetized permanent magnets and rotor II-tangential magnetized permanent magnets are staggered to enhance the air gap magnetic flux density on both sides of rotor II. The number of poles of rotor II-axial magnetized permanent magnets and rotor II-tangential magnetized permanent magnets is equal.

[0009] As a further improvement of the present invention, the sum of the number of pole pairs of the excitation magnetic field generated by the DC excitation winding and the number of pole pairs of the magnetic field generated by the rotor II-tangentially magnetized permanent magnet is equal to the number of teeth of the rotor core I, forming an electrically excited magnetic gear. Since the number of pole pairs of the magnetic field generated by the rotor II-tangentially magnetized permanent magnet is less than the number of teeth of the rotor core I, according to the principle of magnetic field modulation, the rotational speed of rotor II is greater than the rotational speed of rotor I, further improving the power density of the generator. Depending on different sea conditions, the power transmission capability of the magnetic gear is changed by altering the magnitude of the current flowing through the DC excitation winding in real time.

[0010] As a further improvement of the present invention, the rotor I rotates at the same speed as the shaft. When the rotor I rotates, the axially magnetized permanent magnet of the rotor I generates a magnetic field that induces a voltage in the power generation winding I. The power generation winding I is the first power generation port. The rotor II can rotate relative to the shaft. When the rotor II rotates, the axially magnetized permanent magnet of the rotor II generates a magnetic field that induces a voltage in the power generation winding II. The power generation winding II is the second power generation port.

[0011] As a further improvement of the present invention, the wide-range linear-rotating multi-port generator based on sea conditions has the following characteristics: when the waves are small, there is no current in the DC excitation winding, rotor I and the shaft rotate, rotor II does not rotate, and only the generating winding I outputs electrical energy; as the waves gradually increase, the current in the DC excitation winding gradually increases, and rotor II begins to rotate. As the current in the DC excitation winding increases, the torque of rotor II increases, and the power output of the generating winding II gradually increases. The magnitude of the current flowing through the DC excitation winding can be adjusted in real time according to the sea conditions to enable the generator to achieve the optimal wave capture state.

[0012] The beneficial effects of this invention are:

[0013] 1. This invention proposes a linear-rotary controllable multi-port axial flux generator for wave power generation. First, a field-modulated magnetic lead screw converts low-speed linear motion into high-speed rotary motion. Compared with traditional linear motors, this invention improves the generator's power density and output stability. Furthermore, the permanent magnets on rotors I and II are Halbach-magnetized, increasing the air gap magnetic flux density and further enhancing the generator's power density and the maximum power transmission capacity of the magnetic gears, which has significant implications and practical value.

[0014] 2. The motor part of this invention controls the second power generation port through an electrically excited magnetic gear. It controls the magnitude of the current flowing through the DC excitation winding in real time according to the sea conditions, changes the strength of the excitation magnetic field, and thus changes the power transmission capability of the magnetic gear. This expands the effective working area of ​​the generator, improves the device's ability to capture waves, and further enhances the energy conversion efficiency and adaptability of the wave power generation system to wave conditions. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 yes Figure 1 A three-dimensional structural diagram of the generator;

[0017] Figure 3 yes Figure 2 A schematic diagram of two sets of windings on stator I, where (a) is the DC excitation winding on stator I and (b) is the generator winding I on stator I;

[0018] Figure 4 yes Figure 2 Partial schematic diagram of rotor I, where (a) is a schematic diagram of rotor I, (b) is the AB direction pattern in (a), and (c) is the BA direction pattern in (a). ⊙ and Indicating the direction of magnetization;

[0019] Figure 5 yes Figure 2 A partial schematic diagram of the connection between rotor I and rotor II and the shaft, where (a) is rotor I and (b) is rotor II;

[0020] Figure 6 yes Figure 2 A schematic diagram of the working principle of the generator, where (a) is the electrically excited magnetic gear, (b) is the generator port I, and (c) is the generator port II;

[0021] Figure 7 yes Figure 2 A schematic diagram of other possible structures for rotor I;

[0022] Figure 8It is the static torque of rotor I and rotor II when different currents are applied to the DC excitation winding;

[0023] Figure 9 It is the static torque amplitude of rotor I and rotor II when different currents are applied to the DC excitation winding.

[0024] In the diagram: 1. Magnetic field modulated lead screw; 2. Generator; 3. Stator I; 4. Rotor I; 5. Rotor II; 6. Stator II; 7. DC excitation winding; 8. Generator winding I; 9. Rotor core I; 10. Rotor core II; 11. Generator winding II; 12. Rotor I - Axially magnetized permanent magnet; 13. Rotor I - Tangentially magnetized permanent magnet; 14. Shaft; 15. Bearing; 16. Connecting rod; 17. Rotor II - Axially magnetized permanent magnet; 18. Rotor II - Tangentially magnetized permanent magnet. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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 1-9 This application will be described in detail with reference to the embodiments.

[0031] Example: See Figures 1 to 9 This embodiment describes a wide-range linear-rotary multi-port generator based on sea conditions.

[0032] The aforementioned wide-range linear-rotary multi-port generator based on sea state includes a magnetic field modulated magnetic screw 1, a generator 2, a stator I3, a rotor I4, a rotor II5, a stator II6, a DC excitation winding 7, a generator winding I8, a rotor core I9, a rotor core II 10, a generator winding II 11, a rotor I-axially magnetized permanent magnet 12, a rotor I-tangentially magnetized permanent magnet 13, a shaft 14, a bearing 15, a connecting rod 16, a rotor II-axially magnetized permanent magnet 17, and a rotor II-tangentially magnetized permanent magnet 18.

[0033] Additionally, according to one implementation method, see [link to implementation details]. Figure 1 The magnetic field modulated magnetic screw 1 can convert low-speed linear motion into high-speed rotational motion, and transmit mechanical energy to the generator 2 through the rotating shaft 14.

[0034] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 The aforementioned wide-range linear-rotating multi-port generator based on sea conditions mainly includes stator I3, rotor I4, rotor II5 and stator II6.

[0035] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 and Figure 3 The stator I3 slot contains two sets of windings: the lower winding is the DC excitation winding 7, and the upper winding is the generator winding I8.

[0036] Additionally, according to one implementation method, see [link to implementation details]. Figure 4 The rotor core I9 is ​​made of a high-permeability material such as electrical steel DT4C. Rotor I-axial magnetized permanent magnets 12 and rotor I-tangential magnetized permanent magnets 13 are arranged between the rotor cores I9. Each rotor I-axial magnetized permanent magnet 12 and two rotor I-tangential magnetized permanent magnets 13 form one pole of rotor I4. This arrangement can enhance the air gap magnetic flux density between the stator I3 and rotor II5 adjacent to rotor I4. The number of teeth of rotor core I9 is ​​equal to the number of poles of rotor I4.

[0037] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 and Figure 5 The rotor I4 is rigidly connected to the shaft 14 via a connecting rod 16, the rotor II5 is connected to the shaft 14 via a bearing 15, and the stator II6 slot contains the generator winding II11.

[0038] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 The rotor II-axially magnetized permanent magnet 17 and rotor II-tangentially magnetized permanent magnet 18 are arranged in a staggered manner to enhance the air gap magnetic flux density on both sides of rotor II5. The axially magnetized permanent magnet 17 and rotor II-tangentially magnetized permanent magnet 18 have the same number of poles.

[0039] Additionally, according to one implementation method, see [link to implementation details]. Figure 6 The sum of the number of pole pairs of the excitation magnetic field generated by the DC excitation winding 7 and the number of pole pairs of the magnetic field generated by the rotor II-tangentially magnetized permanent magnet 18 is equal to the number of teeth of the rotor core I9, forming an electrically excited magnetic gear. Since the number of pole pairs of the magnetic field generated by the rotor II-tangentially magnetized permanent magnet 18 is less than the number of teeth of the rotor core I9, according to the magnetic field modulation principle, the rotational speed of rotor II5 is greater than the rotational speed of rotor I4, further improving the power density of the generator. The power transmission capability of the magnetic gear is adjusted in real time by changing the current flowing through the DC excitation winding 7 according to different sea conditions.

[0040] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 and Figure 6 The rotor I4 rotates at the same speed as the shaft 14. When the rotor I4 rotates, the axially magnetized permanent magnet 12 of the rotor I generates a magnetic field that induces a voltage in the power generation winding I8. The power generation winding I8 is the first power generation port. The rotor II5 can rotate relative to the shaft 14. When the rotor II5 rotates, the axially magnetized permanent magnet 17 of the rotor II generates a magnetic field that induces a voltage in the power generation winding II11. The power generation winding II11 is the second power generation port.

[0041] Additionally, according to one implementation method, see [link to implementation details]. Figure 2 and Figure 6The aforementioned wide-range linear-rotating multi-port generator based on sea conditions has the following characteristics: When the waves are small, there is no current in the DC excitation winding 7, the rotor I4 and shaft 14 rotate, the rotor II5 does not rotate, and only the generating winding I8 outputs electrical energy. As the waves gradually increase, the current in the DC excitation winding 7 gradually increases, and the rotor II5 begins to rotate. As the current in the DC excitation winding 7 increases, the torque of the rotor II5 increases, and the power output of the generating winding II11 gradually increases. The magnitude of the current flowing through the DC excitation winding 7 can be adjusted in real time according to the sea conditions, so that the generator 2 reaches the optimal wave capture state.

[0042] Additionally, according to one implementation method, see [link to implementation details]. Figure 8 and Figure 9 As the DC excitation current flowing through the DC excitation winding 7 gradually increases, the static torque amplitude of rotors I4 and II5 gradually increases, the maximum mechanical power that rotor II5 can transmit gradually increases, and the maximum power that generator winding II11 can output gradually increases.

[0043] Additionally, according to one implementation method, see [link to implementation details]. Figure 4 and Figure 7 The rotor I4 can also be adopted Figure 7 The other three structures are shown.

[0044] Additionally, according to one implementation method, see [link to implementation details]. Figure 6 The rotor I4 has 12 slots, and the rotor I-axially magnetized permanent magnet 12 has 10 poles, forming a 12-slot / 10-pole structure.

[0045] Additionally, according to one implementation method, see [link to implementation details]. Figure 6 The DC excitation winding 7 generates a 6-pole excitation magnetic field, the rotor core I9 has 10 teeth, and the rotor II-tangential magnetized permanent magnet 18 has a total of 4 poles.

[0046] Additionally, according to one implementation method, see [link to implementation details]. Figure 6 The stator II6 has 12 slots, and the rotor II-axially magnetized permanent magnet 17 has 8 poles, forming a 12-slot / 8-pole structure.

[0047] 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 wide-range linear-rotary multi-port generator based on sea state, characterized in that: The system includes a magnetic field modulated magnetic screw (1) and a generator (2). The magnetic field modulated magnetic screw (1) can convert low-speed linear motion into high-speed rotational motion and transmit mechanical energy to the generator (2) through a rotating shaft (14). The generator (2) includes a stator I (3), a rotor I (4), a rotor II (5), and a stator II (6) arranged in sequence. The stator I (3) contains two sets of windings in its slots. The upper winding is a DC excitation winding (7), and the lower winding is a generator winding I (8). The rotor I (4) is rigidly connected to the rotating shaft (14) through a connecting rod (16), and the rotor II (5) is connected to the rotating shaft (14) through a bearing (15). The stator II (6) contains a generator winding II (11) in its slots. The rotor I (4) includes a rotor core I (9), a rotor I-axial magnetized permanent magnet (12), and a rotor I-tangential magnetized permanent magnet (13). The rotor II (5) includes a rotor core I (9). The rotor core I (9) is arranged circumferentially, with rotor I-axially magnetized permanent magnets (12) and rotor I-tangentially magnetized permanent magnets (13) arranged between adjacent rotor cores I (9). 3) One pole of rotor I (4) is used to enhance the air gap magnetic flux density on both sides of rotor I (4) axially. The number of teeth of rotor core I (9) is equal to the number of poles of rotor I (4). The rotor core II (10) is arranged circumferentially, and a rotor II-tangential magnetized permanent magnet (18) is provided between adjacent rotor core II (10). The rotor II-axial magnetized permanent magnet (17) is located in the lower layer of rotor II-tangential magnetized permanent magnet (18). Furthermore, the rotor II-axial magnetized permanent magnet (17) and the rotor II-tangential magnetized permanent magnet (18) are staggered along the circumference to enhance the air gap magnetic flux density on both sides of the rotor II (5) axially. The rotor II-axial magnetized permanent magnet (17) and the rotor II-tangential magnetized permanent magnet (18) have the same number of poles. The sum of the number of pole pairs of the excitation magnetic field generated by the DC excitation winding (7) and the number of pole pairs of the magnetic field generated by the rotor II-tangential magnetized permanent magnet (18) is equal to the number of teeth of the rotor core I (9). The DC excitation winding (7), the rotor II-tangential magnetized permanent magnet (18) and the rotor The teeth of the iron core I (9) and the three together form an electrically excited magnetic gear; the rotor I (4) rotates at the same speed as the shaft (14). When the rotor I (4) rotates, the rotor I-axially magnetized permanent magnet (12) generates a magnetic field that induces a voltage in the power generation winding I (8). The power generation winding I (8) is the first power generation port. The rotor II (5) rotates relative to the shaft (14). When the rotor II (5) rotates, the rotor II-axially magnetized permanent magnet (17) generates a magnetic field that induces a voltage in the power generation winding II (11). The power generation winding II (11) is the second power generation port.

2. A wide-range linear-rotating multi-port generator based on sea state as described in claim 1, characterized in that: The rotor core I (9) is made of a high magnetic permeability material.

3. A wide-range linear-rotating multi-port generator based on sea state as described in claim 1, characterized in that: Since the number of magnetic field pole pairs generated by the rotor II-tangential magnetized permanent magnet (18) is less than the number of teeth of the rotor core I (9), according to the principle of magnetic field modulation, the rotational speed of rotor II (5) is greater than that of rotor I (4), which further improves the power density of the generator; according to different sea conditions, the power transmission capability of the magnetic gear is changed by changing the current in the DC excitation winding (7) in real time.

4. A wide-range linear-rotating multi-port generator based on sea state as described in claim 3, characterized in that: When the waves are small, there is no current in the DC excitation winding (7), the rotor I (4) and the shaft (14) rotate, the rotor II (5) does not rotate, and only the generator winding I (8) outputs electrical energy. As the waves gradually increase, the current in the DC excitation winding (7) gradually increases, the rotor II (5) begins to rotate, and as the current in the DC excitation winding (7) increases, the torque of the rotor II (5) increases, and the power output of the generator winding II (11) gradually increases. The current in the DC excitation winding (7) is adjusted in real time according to the sea conditions so that the generator (2) reaches the optimal wave capture state.

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