A linear generator for wave energy generation

Abstract

This invention discloses a linear generator for wave energy generation, comprising multiple linear generator modules and a linear generator mover support frame. The linear generator mover support frame has a prism structure, with the number of facets equal to the number of phases (m) of the generator. Multiple phase linear generator modules are respectively fixedly mounted on the side of the linear generator mover support frame via their mover cores, and the direction of movement of the movers is consistent with the axial direction of the linear generator mover support frame. The linear generator for wave energy generation proposed in this invention not only has a simple structure and manufacturing process but also achieves higher power density. Furthermore, the edge effects of each phase are balanced, ensuring the quality of the output power. Simultaneously, the phases are completely decoupled, giving the generator high reliability and strong fault tolerance.

Description

Technical Field

[0001] This invention relates to the field of ocean energy generation, and particularly to a linear generator for wave energy generation. Background Art

[0002] Wave energy refers to the kinetic and potential energy of ocean surface waves. It is mechanical energy generated by wind-driven waves and stored in the form of the kinetic and potential energy of seawater. The energy conversion for wave energy power generation can generally be divided into two conversion stages: the primary conversion stage refers to converting wave energy into mechanical energy through a wave energy harvesting system; the secondary conversion stage refers to converting the harvested mechanical energy into electrical energy.

[0003] Existing wave energy generation schemes can be divided into two categories based on their principles: wave energy generation schemes based on rotary generators and direct-drive wave energy generation schemes based on linear generators. The rotary generator-based wave energy generation schemes (CN201710101954.5, CN202011361247.8, CN202211210789.4, CN202220681409.4, CN202410515464.X) rely on intermediate components such as air turbines or hydraulic motors to convert captured wave energy into rotational mechanical energy, which then drives the rotary generator. This approach not only increases the complexity of the system but also exacerbates energy loss due to the intermediate mechanical energy conversion process, thereby reducing the utilization rate of wave energy. While the direct-drive wave energy generation scheme based on linear generators in related technologies (CN201310504361.5, CN201410053259.2, CN201810562401.4, CN201910833359.X, CN202111349351.X) directly loads the linear reciprocating motion of waves onto the generator mover, thus achieving full utilization of wave energy, the conventional linear generators used have low power density and inevitably suffer from edge effects, resulting in poor output power quality. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a linear generator for wave energy generation, which is not only simple in structure and process, but also achieves higher power density. Furthermore, the edge effects of each phase of the motor are balanced, ensuring the quality of the output power. At the same time, the phases are completely decoupled, giving the motor high reliability and strong fault tolerance.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a linear generator for wave energy generation, comprising multiple linear generator modules and a linear generator mover support frame; the linear generator mover support frame is a prism structure, the number of its side faces being equal to the number of motor phases m; multiple phase linear generator modules are respectively fixedly installed on the side of the linear generator mover support frame through the mover core of the linear generator module, and the moving direction of the mover is consistent with the axial direction of the linear generator mover support frame.

[0006] Furthermore, multiple linear power generation modules are single-phase motors.

[0007] Furthermore, each linear power generation module consists of a linear power generation module stator and a linear power generation module mover.

[0008] Furthermore, the stator of the linear power generation module consists of a stator yoke, stator teeth, and stator windings.

[0009] Furthermore, the stator teeth of the linear power generation module are set on the stator yoke of the linear power generation module, and the stator winding of the linear power generation module is a concentrated winding, wound on the stator teeth of the linear power generation module.

[0010] Furthermore, the stator winding of the linear power generation module adopts a single-layer winding form.

[0011] Furthermore, the linear power generation module mover consists of a linear power generation module mover N-pole permanent magnet, a linear power generation module mover S-pole permanent magnet, and a linear power generation module mover core.

[0012] Furthermore, the N-pole permanent magnet and the S-pole permanent magnet of the linear power generation module are alternately distributed on the core of the linear power generation module.

[0013] Furthermore, the stators of multiple linear generator modules are arranged in an axial alignment, and the movers of multiple linear generator modules are offset from each other by 2τ / m in the axial direction, where τ is the motor pole pitch and m is the number of motor phases.

[0014] Furthermore, the movers of multiple linear generator modules are aligned axially, and the stators of multiple linear generator modules are offset from each other by 2τ / m axially, where τ is the motor pole pitch and m is the number of motor phases.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The linear generator for wave energy generation proposed in this invention is obtained by integrating multiple single-phase linear power generation modules. Each phase is modularly designed, with simple structure and process, flexible and convenient design, and arbitrary phase design can be achieved through simple structural arrangement.

[0017] 2. The single-phase linear power generation module used has a high winding coefficient and short winding ends, resulting in high winding utilization. Furthermore, the permanent magnet of the single-phase linear power generation module has high utilization. Therefore, the linear generator for wave energy generation based on the modular integration of multiple single-phase linear power generation modules has a higher power density.

[0018] 3. Based on the modular integration of multiple single-phase linear power generation modules, the edge effects of each phase are balanced. Therefore, the linear generator for wave energy generation proposed in this invention does not have the edge effect problem of conventional linear motors, thus ensuring the quality of output power.

[0019] 4. The linear generator for wave energy generation proposed in this invention is completely decoupled between each phase, and has high reliability and strong fault tolerance. Attached Figure Description

[0020] Figure 1 The overall structure of the linear generator according to the first embodiment of the present invention;

[0021] Figure 2 This is an unfolded view of the three single-phase linear power generation modules of the linear generator according to the first embodiment of the present invention;

[0022] Figure 3 This is a winding distribution diagram of the three single-phase stators of the linear generator according to the first embodiment of the present invention;

[0023] Figure 4 This is a linear generator rotor support frame according to the first embodiment of the present invention;

[0024] Figure 5 This is the overall structure of the linear generator according to the second embodiment of the present invention;

[0025] Figure 6 This is an unfolded view of the three single-phase linear power generation modules of the linear generator according to the second embodiment of the present invention;

[0026] Figure 7 This is the overall structure of the linear generator according to the third embodiment of the present invention;

[0027] Figure 8 This is an unfolded view of the six single-phase linear power generation modules of the linear generator according to the third embodiment of the present invention;

[0028] Figure 9 This is a linear generator rotor support frame according to the third embodiment of the present invention;

[0029] Figure 10 This is the overall structure of the linear generator according to the fourth embodiment of the present invention;

[0030] Figure 11This is an unfolded view of the six single-phase linear power generation modules of the linear generator according to the fourth embodiment of the present invention;

[0031] Figure 12 This is a winding distribution diagram of the three single-phase stators of the linear generator according to the fifth embodiment of the present invention.

[0032] Explanation of reference numerals in the attached diagram: 1. First-phase linear generator module; 1-1. Stator of the first-phase linear generator module; 1-1-1. Stator yoke of the first-phase linear generator module; 1-1-2. Stator teeth of the first-phase linear generator module; 1-1-3. Stator winding of the first-phase linear generator module; 1-2. Mover of the first-phase linear generator module; 1-2-1. N-pole permanent magnet of the mover of the first-phase linear generator module; 1-2-2. S-pole permanent magnet of the mover of the first-phase linear generator module; 1-2-3. Mover core of the first-phase linear generator module; 2. Second-phase linear generator module; 2-1. Stator of the second-phase linear generator module; 2-1-1. Stator yoke of the second-phase linear generator module; 2-1-2. Stator teeth of the second-phase linear generator module; 2-1-3. Stator core of the second-phase linear generator module. Sub-winding, 2-2 second phase linear generator module mover, 2-2-1 second phase linear generator module mover N-pole permanent magnet, 2-2-2 second phase linear generator module mover S-pole permanent magnet, 2-2-3 second phase linear generator module mover core, 3 third phase linear generator module, 3-1 third phase linear generator module stator, 3-1-1 third phase linear generator module stator yoke, 3-1-2 third phase linear generator module stator teeth, 3-1-3 third phase linear generator module stator winding, 3-2 third phase linear generator module mover, 3-2-1 third phase linear generator module mover N-pole permanent magnet, 3-2-2 third phase linear generator module mover S-pole permanent magnet, 3-2-3 third phase linear generator module mover core, 4th Four-phase linear generator module, 4-1 stator of the fourth-phase linear generator module, 4-1-1 stator yoke of the fourth-phase linear generator module, 4-1-2 stator teeth of the fourth-phase linear generator module, 4-1-3 stator winding of the fourth-phase linear generator module, 4-2 mover of the fourth-phase linear generator module, 4-2-1 N-pole permanent magnet of the mover of the fourth-phase linear generator module, 4-2-2 S-pole permanent magnet of the mover of the fourth-phase linear generator module, 4-2-3 mover core of the fourth-phase linear generator module, 5 fifth-phase linear generator module, 5-1 stator of the fifth-phase linear generator module, 5-1-1 stator yoke of the fifth-phase linear generator module, 5-1-2 stator teeth of the fifth-phase linear generator module, 5-1-3 stator winding of the fifth-phase linear generator module, 5-2 fifth... 5-2-1 Fifth phase linear generator mover, 5-2-2 Fifth phase linear generator mover N-pole permanent magnet, 5-2-3 Fifth phase linear generator mover core, 6 Sixth phase linear generator module, 6-1 Sixth phase linear generator module stator, 6-1-1 Sixth phase linear generator module stator yoke, 6-1-2 Sixth phase linear generator module stator teeth, 6-1-3 Sixth phase linear generator module stator winding, 6-2 Sixth phase linear generator module mover, 6-2-1 Sixth phase linear generator module mover N-pole permanent magnet, 6-2-2 Sixth phase linear generator module mover S-pole permanent magnet, 6-2-3 Sixth phase linear generator module mover core, 7 Linear generator mover support frame. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings. For ease of explanation, the present invention is illustrated in the following embodiments: the first embodiment has 3 phases, the stators of each phase are aligned axially, and the movers of each phase are offset by a certain phase difference axially; the second embodiment has 3 phases, the stators of each phase are offset by a certain phase difference axially, and the movers of each phase are aligned axially; the third embodiment has 6 phases, the stators of each phase are aligned axially, and the movers of each phase are offset by a certain phase difference axially; the fourth embodiment has 6 phases, the stators of each phase are offset by a certain phase difference axially, and the movers of each phase are aligned axially; and the fifth embodiment has 3 phases, and each phase winding uses a single-layer winding.

[0034] The first embodiment of the present invention provides a linear generator for wave energy generation, the overall structure of which is as follows: Figure 1 As shown, the linear generator includes a first-phase linear generator module 1, a second-phase linear generator module 2, a third-phase linear generator module 3, and a linear generator mover support frame 7. The linear generator mover support frame 7 is a prism structure, as shown... Figure 4 As shown, the number of sides is equal to the number of phases m of the motor. The first-phase linear generator module 1, the second-phase linear generator module 2, and the third-phase linear generator module 3 are fixedly installed on the side of the linear generator mover support frame 7 via the first-phase linear generator module mover core 1-2-3, the second-phase linear generator module mover core 2-2-3, and the third-phase linear generator module mover core 3-2-3, respectively. One phase is installed on each side, and the direction of movement of the mover is consistent with the axial direction of the linear generator mover support frame 7.

[0035] Furthermore, the first-phase linear power generation module 1, the second-phase linear power generation module 2, and the third-phase linear power generation module 3 are all single-phase motors. The first-phase linear power generation module 1 consists of a first-phase linear power generation module stator 1-1 and a first-phase linear power generation module mover 1-2; the second-phase linear power generation module 2 consists of a second-phase linear power generation module stator 2-1 and a second-phase linear power generation module mover 2-2; and the third-phase linear power generation module 3 consists of a third-phase linear power generation module stator 3-1 and a third-phase linear power generation module mover 3-2.

[0036] Therefore, the linear generator for wave energy generation proposed in this invention is integrated from multiple single-phase linear generator modules. Each phase is modularly designed, with a simple structure and process, and flexible and convenient design. Arbitrary phase design can be achieved through a simple structural arrangement. Furthermore, the phases of the motor are completely decoupled, resulting in high reliability and strong fault tolerance. At the same time, based on the mutual balance of the edge effects of each phase due to the modular integration of multiple single-phase linear generator modules, the linear generator for wave energy generation proposed in this invention does not have the edge effect problem of conventional linear motors, thus ensuring the quality of output power.

[0037] Depend on Figure 1 and Figure 2 It can be seen that the first phase linear power generation module stator 1-1 is composed of the first phase linear power generation module stator yoke 1-1-1, the first phase linear power generation module stator teeth 1-1-2, and the first phase linear power generation module stator winding 1-1-3; the second phase linear power generation module stator 2-1 is composed of the second phase linear power generation module stator yoke 2-1-1, the second phase linear power generation module stator teeth 2-1-2, and the second phase linear power generation module stator winding 2-1-3; the third phase linear power generation module stator 3-1 is composed of the third phase linear power generation module stator yoke 3-1-1, the third phase linear power generation module stator teeth 3-1-2, and the third phase linear power generation module stator winding 3-1-3. The stator teeth 1-1-2, 2-1-2, and 3-1-2 of the first-phase linear power generation module are respectively mounted on the stator yokes 1-1-1, 2-1-1, and 3-1-1 of the first-phase linear power generation module, respectively. Furthermore, the stator windings 1-1-3, 2-1-3, and 3-1-3 of the first-phase linear power generation module are all concentrated windings, wound on the stator teeth 1-1-2, 2-1-2, and 3-1-2 of the first-phase linear power generation module, respectively. Figure 3 As shown, the single-phase linear generator module used has a high winding coefficient and short winding ends, resulting in high winding utilization.

[0038] Depend on Figure 2It is also known that the first phase linear power generation module mover 1-2 is composed of the first phase linear power generation module mover N-pole permanent magnet 1-2-1, the first phase linear power generation module mover S-pole permanent magnet 1-2-2, and the first phase linear power generation module mover core 1-2-3; the second phase linear power generation module mover 2-2 is composed of the second phase linear power generation module mover N-pole permanent magnet 2-2-1, the second phase linear power generation module mover S-pole permanent magnet 2-2-2, and the second phase linear power generation module mover core 2-2-3; the third phase linear power generation module mover 3-2 is composed of the third phase linear power generation module mover N-pole permanent magnet 3-2-1, the third phase linear power generation module mover S-pole permanent magnet 3-2-2, and the third phase linear power generation module mover core 3-2-3. The N-pole permanent magnet 1-2-1 and S-pole permanent magnet 1-2-2 of the first-phase linear generator module are alternately distributed on the rotor core 1-2-3. Similarly, the N-pole permanent magnet 2-2-1 and S-pole permanent magnet 2-2-2 of the second-phase linear generator module are alternately distributed on the rotor core 2-2-3. Likewise, the N-pole permanent magnet 3-2-1 and S-pole permanent magnet 3-2-2 of the third-phase linear generator module are alternately distributed on the rotor core 3-2-3. The high utilization rate of permanent magnets in single-phase linear generator modules results in a higher power density for wave energy generation, as a linear generator based on the modular integration of multiple single-phase linear generator modules.

[0039] Furthermore, the stators 1-1 of the first-phase linear generator module, 2-1 of the second-phase linear generator module, and 3-1 of the third-phase linear generator module are aligned axially, while the movers 1-2 of the first-phase linear generator module, 2-2 of the second-phase linear generator module, and 3-2 of the third-phase linear generator module are offset from each other axially by 2τ / 3, where τ is the motor pole pitch. That is, the first-phase linear generator module 1 leads the second-phase linear generator module 2 by 120 electrical degrees, and the second-phase linear generator module 2 leads the third-phase linear generator module 3 by 120 electrical degrees.

[0040] The second embodiment of the present invention provides a linear generator for wave energy generation, the overall structure of which is as follows: Figure 5 As shown. The number of motor phases in this embodiment is the same as in the first embodiment, and the overall structure is similar to the first embodiment. The main difference is that the stators 1-1 of the first-phase linear generator module, 2-1 of the second-phase linear generator module, and 3-1 of the third-phase linear generator module are offset from each other by 2τ / 3 in the axial direction, where τ is the motor pole pitch. Meanwhile, the movers 1-2 of the first-phase linear generator module, 2-2 of the second-phase linear generator module, and 3-2 of the third-phase linear generator module are aligned in the axial direction, as shown. Figure 6As shown, the first-phase linear generator module 1 leads the second-phase linear generator module 2 by 120 electrical degrees, and the second-phase linear generator module 2 leads the third-phase linear generator module 3 by 120 electrical degrees. The winding distribution diagram of the three single-phase stators in this embodiment is as follows. Figure 3 As shown.

[0041] The third embodiment of the present invention provides a linear generator for wave energy generation, the overall structure of which is as follows: Figure 7 As shown. In this embodiment, the number of motor phases m = 6. It can be seen that the linear generator includes a first-phase linear generator module 1, a second-phase linear generator module 2, a third-phase linear generator module 3, a fourth-phase linear generator module 4, a fifth-phase linear generator module 5, a sixth-phase linear generator module 6, and a linear generator mover support frame 7. The linear generator mover support frame 7 is a prism structure, as shown... Figure 9 As shown, the number of faces on its side is equal to the number of phases m of the motor. The first-phase linear generator module 1, the second-phase linear generator module 2, the third-phase linear generator module 3, the fourth-phase linear generator module 4, the fifth-phase linear generator module 5, and the sixth-phase linear generator module 6 are respectively fixedly installed on the side of the linear generator mover support frame 7 via the first-phase linear generator mover core 1-2-3, the second-phase linear generator mover core 2-2-3, the third-phase linear generator mover core 3-2-3, the fourth-phase linear generator mover core 4-2-3, the fifth-phase linear generator mover core 5-2-3, and the sixth-phase linear generator mover core 6-2-3, and the direction of movement of the mover is consistent with the axial direction of the linear generator mover support frame 7.

[0042] Furthermore, by Figure 7 and Figure 8 It can be seen that the first-phase linear power generation module 1, the second-phase linear power generation module 2, the third-phase linear power generation module 3, the fourth-phase linear power generation module 4, the fifth-phase linear power generation module 5, and the sixth-phase linear power generation module 6 are all single-phase motors. The first-phase linear power generation module 1 consists of a first-phase linear power generation module stator 1-1 and a first-phase linear power generation module mover 1-2; the second-phase linear power generation module 2 consists of a second-phase linear power generation module stator 2-1 and a second-phase linear power generation module mover 2-2; the third-phase linear power generation module 3 consists of a third-phase linear power generation module stator 3-1 and a third-phase linear power generation module mover 3-2; the fourth-phase linear power generation module 4 consists of a fourth-phase linear power generation module stator 4-1 and a fourth-phase linear power generation module mover 4-2; the fifth-phase linear power generation module 5 consists of a fifth-phase linear power generation module stator 5-1 and a fifth-phase linear power generation module mover 5-2; and the sixth-phase linear power generation module 6 consists of a sixth-phase linear power generation module stator 6-1 and a sixth-phase linear power generation module mover 6-2.

[0043] Furthermore, the first-phase linear power generation module stator 1-1 is composed of a first-phase linear power generation module stator yoke 1-1-1, a first-phase linear power generation module stator teeth 1-1-2, and a first-phase linear power generation module stator winding 1-1-3; the second-phase linear power generation module stator 2-1 is composed of a second-phase linear power generation module stator yoke 2-1-1, a second-phase linear power generation module stator teeth 2-1-2, and a second-phase linear power generation module stator winding 2-1-3; the third-phase linear power generation module stator 3-1 is composed of a third-phase linear power generation module stator yoke 3-1-1, a third-phase linear power generation module stator teeth 3-1-2, and a third-phase linear power generation module stator winding 3-1-3. The fourth-phase linear generator stator 4-1 is composed of the fourth-phase linear generator stator yoke 4-1-1, the fourth-phase linear generator stator teeth 4-1-2, and the fourth-phase linear generator stator winding 4-1-3; the fifth-phase linear generator stator 5-1 is composed of the fifth-phase linear generator stator yoke 5-1-1, the fifth-phase linear generator stator teeth 5-1-2, and the fifth-phase linear generator stator winding 5-1-3; the sixth-phase linear generator stator 6-1 is composed of the sixth-phase linear generator stator yoke 6-1-1, the sixth-phase linear generator stator teeth 6-1-2, and the sixth-phase linear generator stator winding 6-1-3. The stator teeth 1-1-2, 2-1-2, 3-1-2, 4-1-2, 5-1-2, and 6-1-2 of the first-phase linear power generation module stator teeth 1-1-1, 2-1-1, 3-1-1, 4-1-1, 5-1-1, and 6-1-1 of the sixth-phase linear power generation module stator teeth 1-1-1, 2-1-1, 3-1-1, 4-1-1, 5-1-1, and 6-1 ... sixth-phase linear power generation module stator teeth 1-1-1, 2-1-1, 3-1-1, The stator windings 1-1-3, 2-1-3, 3-1-3, 4-1-3, 5-1-3, and 6-1-3 of the electrical module stator windings are all concentrated windings, wound on the stator teeth 1-1-2, 2-1-2, 3-1-2, 4-1-2, 5-1-2, and 6-1-2 of the first, second, third, fourth, and fifth phases of the electrical module stator windings, respectively. Figure 3 As shown.

[0044] Depend on Figure 8It can also be seen that the first-phase linear power generation module mover 1-2 is composed of the first-phase linear power generation module mover N-pole permanent magnet 1-2-1, the first-phase linear power generation module mover S-pole permanent magnet 1-2-2, and the first-phase linear power generation module mover core 1-2-3; the second-phase linear power generation module mover 2-2 is composed of the second-phase linear power generation module mover N-pole permanent magnet 2-2-1, the second-phase linear power generation module mover S-pole permanent magnet 2-2-2, and the second-phase linear power generation module mover core 2-2-3; the third-phase linear power generation module mover 3-2 is composed of the third-phase linear power generation module mover N-pole permanent magnet 3-2-1, the third-phase linear power generation module mover S-pole permanent magnet 3-2-2, and the third-phase linear power generation module mover core 3-2-3. The fourth-phase linear power generation module mover 4-2 is composed of the fourth-phase linear power generation module mover N-pole permanent magnet 4-2-1, the fourth-phase linear power generation module mover S-pole permanent magnet 4-2-2, and the fourth-phase linear power generation module mover core 4-2-3; the fifth-phase linear power generation module mover 5-2 is composed of the fifth-phase linear power generation module mover N-pole permanent magnet 5-2-1, the fifth-phase linear power generation module mover S-pole permanent magnet 5-2-2, and the fifth-phase linear power generation module mover core 5-2-3; the sixth-phase linear power generation module mover 6-2 is composed of the sixth-phase linear power generation module mover N-pole permanent magnet 6-2-1, the sixth-phase linear power generation module mover S-pole permanent magnet 6-2-2, and the sixth-phase linear power generation module mover core 6-2-3. The N-pole permanent magnet 1-2-1 and the S-pole permanent magnet 1-2-2 of the first-phase linear power generation module are alternately distributed on the core 1-2-3 of the first-phase linear power generation module; the N-pole permanent magnet 2-2-1 and the S-pole permanent magnet 2-2-2 of the second-phase linear power generation module are alternately distributed on the core 2-2-3 of the second-phase linear power generation module; the N-pole permanent magnet 3-2-1 and the S-pole permanent magnet 3-2-2 of the third-phase linear power generation module are alternately distributed on the core 3-2-3 of the third-phase linear power generation module. The N-pole permanent magnet 4-2-1 and the S-pole permanent magnet 4-2-2 of the fourth-phase linear power generation module are alternately distributed on the core 4-2-3 of the fourth-phase linear power generation module; the N-pole permanent magnet 5-2-1 and the S-pole permanent magnet 5-2-2 of the fifth-phase linear power generation module are alternately distributed on the core 5-2-3 of the fifth-phase linear power generation module; the N-pole permanent magnet 6-2-1 and the S-pole permanent magnet 6-2-2 of the sixth-phase linear power generation module are alternately distributed on the core 6-2-3 of the sixth-phase linear power generation module.

[0045] Furthermore, the stators 1-1, 2-1, 3-1, 4-1, 5-1, and 6-1 of the first-phase linear power generation module are aligned axially, while the axial offset of the movers 1-2, 2-2, 3-2, 4-2, 5-2, and 6-2 is shown in the figure. Figure 8 The three-phase modules consist of three moving parts: the first-phase linear generator module 1-2, the second-phase linear generator module 2-2, and the third-phase linear generator module 3-2, which are offset from each other by 2τ / 3 axially. The fourth-phase linear generator module 4-2, the fifth-phase linear generator module 5-2, and the sixth-phase linear generator module 6-2, which also are offset from each other by 2τ / 3 axially. These two three-phase modules are further offset from each other by τ / m. In other words, the first-phase linear generator module 1 leads the second-phase linear generator module 2 by 120 electrical degrees, the second-phase linear generator module 2 leads the third-phase linear generator module 3 by 120 electrical degrees, the fourth-phase linear generator module 4 leads the fifth-phase linear generator module 5 by 120 electrical degrees, and the fifth-phase linear generator module 5 leads the sixth-phase linear generator module 6 by 120 electrical degrees. The electrical degree by which the first-phase linear generator module 1 leads the fourth-phase linear generator module 4 is 180° / m, where m is the number of phases in the motor.

[0046] In addition, by Figure 7 and Figure 8 It can be seen that the single-phase linear generator modules are arranged in a counterclockwise order as follows: first-phase linear generator module 1, fifth-phase linear generator module 5, second-phase linear generator module 2, fourth-phase linear generator module 4, third-phase linear generator module 3, and sixth-phase linear generator module 6. This arrangement helps to suppress the circumferential torsional moment acting on the linear generator mover support frame 7.

[0047] The fourth embodiment of the present invention provides a linear generator for wave energy generation, the overall structure of which is as follows: Figure 10As shown. The number of motor phases in this embodiment is the same as in the third embodiment, and the overall structure is similar. The main difference lies in the axial alignment of the first-phase linear generator movers 1-2, 2-2, 3-2, 4-2, 5-2, and 6-2, while the axial offset of the first-phase stators 1-1, 2-1, 3-1, 4-1, 5-1, and 6-1 is shown in the figure. Figure 11 The three-phase modules consist of three stators: the first-phase linear generator stator 1-1, the second-phase linear generator stator 2-1, and the third-phase linear generator stator 3-1, which are axially offset from each other by 2τ / 3. The fourth-phase linear generator stator 4-1, the fifth-phase linear generator stator 5-1, and the sixth-phase linear generator stator 6-1, which also axially offset from each other by 2τ / 3. These two three-phase modules are further offset from each other by τ / m. In other words, the first-phase linear generator 1 leads the second-phase linear generator 2 by 120 electrical degrees, the second-phase linear generator 2 leads the third-phase linear generator 3 by 120 electrical degrees, the fourth-phase linear generator 4 leads the fifth-phase linear generator 5 by 120 electrical degrees, and the fifth-phase linear generator 5 leads the sixth-phase linear generator 6 by 120 electrical degrees. The electrical degree by which the first-phase linear generator 1 leads the fourth-phase linear generator 4 is 180° / m, where m is the number of phases in the motor.

[0048] In addition, by Figure 10 and Figure 11 It can be seen that the single-phase linear generator modules are arranged in a counterclockwise order as follows: first-phase linear generator module 1, fifth-phase linear generator module 5, second-phase linear generator module 2, fourth-phase linear generator module 4, third-phase linear generator module 3, and sixth-phase linear generator module 6. This arrangement helps to suppress the circumferential torsional moment acting on the linear generator mover support frame 7.

[0049] The fifth embodiment of the present invention, taking a motor with m=3 phases as an example, provides a winding distribution diagram of the three single-phase stators of a linear generator for wave energy generation, as shown below. Figure 12 As shown. Different from Figure 3 The double-layer winding structure shown in this embodiment uses a single-layer winding form for each phase winding.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, such as changes in the number of motor phases, slot-pole combination schemes, winding forms, external mover forms, etc. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A linear generator for wave energy generation, comprising multiple linear generator modules and a linear generator mover support frame; the linear generator mover support frame is a prism structure, the number of its side faces being equal to the number of motor phases m; multiple linear generator modules are respectively fixedly mounted on the side of the linear generator mover support frame via linear generator module mover cores, and the movement direction of the movers is consistent with the axial direction of the linear generator mover support frame; each linear generator module consists of a linear generator module stator and a linear generator module mover; the N-pole permanent magnets and S-pole permanent magnets of the linear generator module mover are alternately distributed on the linear generator module mover core; the multiple linear generator module stators are aligned axially, and the multiple linear generator module movers are offset from each other axially by 2τ / m, where τ is the motor pole pitch and m is the number of motor phases; the multiple linear generator module movers are aligned axially, and the multiple linear generator module stators are offset from each other axially by 2τ / m, where τ is the motor pole pitch and m is the number of motor phases.

2. The linear generator for wave energy generation according to claim 1, characterized in that: Multiple linear generator modules are single-phase motors.

3. The linear generator for wave energy generation according to claim 1, characterized in that: The stator of the linear generator module consists of a stator yoke, stator teeth, and stator windings.

4. The linear generator for wave energy generation according to claim 3, characterized in that: The stator teeth of the linear power generation module are set on the stator yoke of the linear power generation module, and the stator winding of the linear power generation module is a concentrated winding, wound on the stator teeth of the linear power generation module.

5. The linear generator for wave energy generation according to claim 3, characterized in that: The stator winding of the linear generator module adopts a single-layer winding form.

6. The linear generator for wave energy generation according to claim 1, characterized in that: The linear generator module mover consists of a linear generator module mover N-pole permanent magnet, a linear generator module mover S-pole permanent magnet, and a linear generator module mover core.

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