Linear generator for wave power generation

Abstract

The invention discloses a linear generator for wave power generation. The linear generator comprises a plurality of linear power generation modules and a linear generator rotor supporting frame. The linear generator mover supporting frame is of a prism structure, and the number of the side faces is equal to the motor phase number m. The multiple phase linear power generation modules are fixedly installed on the side face of the linear generator mover supporting frame through the linear power generation module mover iron cores, and the moving direction of the mover is consistent with the axis direction of the linear generator mover supporting frame. The linear generator for wave power generation is simple in structure and process, higher power density can be achieved, the end effects of all phases of the motor are mutually balanced, the quality of output electric energy is guaranteed, meanwhile, all phases are completely decoupled, and the motor has high reliability and high fault tolerance.

Description

Technical Field

[0001] The invention relates to the field of ocean energy power generation, and in particular to a linear generator for wave energy power generation. Background Art

[0002] Wave energy refers to the kinetic energy and potential energy of waves on the ocean surface. It is mechanical energy generated by the wind pushing the waves and stored in the form of kinetic energy and potential energy of seawater. The energy conversion of wave power generation can generally be divided into two conversion stages: the first conversion stage refers to the conversion of wave energy into mechanical energy through the wave energy collection system; the second conversion stage refers to the conversion of the collected mechanical energy into electrical energy.

[0003] Existing wave energy power generation schemes can be divided into wave energy power generation schemes based on rotating generators and direct-drive wave energy power generation schemes based on linear generators according to their principles. The wave energy power generation schemes based on rotating generators in the related art (CN201710101954.5, CN202011361247.8, CN202211210789.4, CN202220681409.4, CN202410515464.X) are based on intermediate links such as air turbines or hydraulic motors to convert the captured wave energy into rotating mechanical energy, and then drive the rotating generator. This scheme not only increases the complexity of the system, but also the intermediate conversion link of mechanical energy also aggravates energy loss, thereby reducing the utilization rate of wave energy. The direct-drive wave energy power generation scheme based on linear generators in the related art (CN201310504361.5, CN201410053259.2, CN201810562401.4, CN201910833359.X, CN202111349351.X) directly loads the linear reciprocating motion of waves onto the generator rotor, thus fully utilizing the wave energy. However, the conventional linear generators used have low power density and inevitably have edge effect problems, resulting in poor output power quality. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a linear generator for wave energy power generation, which not only has a simple structure and process, but also can achieve a higher power density. In addition, the end effects of each phase of the motor are balanced with each other to ensure the quality of the output power. At the same time, the phases are completely decoupled, so that the motor has higher reliability and stronger fault tolerance.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a linear generator for wave energy power generation, including multiple linear power generation modules and a linear generator rotor support frame; the linear generator rotor support frame is a prismatic structure, and the number of faces on its side is equal to the number of motor phases m; multiple phase linear power generation modules are respectively fixedly installed on the side of the linear generator rotor support frame through the linear power generation module rotor core, and the moving direction of the rotor is consistent with the axial direction of the linear generator rotor support frame.

[0006] Furthermore, the plurality of linear power generation modules are all single-phase motors.

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

[0008] Furthermore, the linear power generation module stator is composed of a linear power generation module stator yoke, a linear power generation module stator teeth and a linear power generation module stator winding.

[0009] Furthermore, the stator teeth of the linear power generation module are arranged on the stator yoke of the linear power generation module, and the stator winding of the linear power generation module is a centralized winding, which is 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 is composed 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 iron core.

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

[0013] Furthermore, the stators of the multiple linear power generation modules are arranged in an aligned manner in the axial direction, and the movers of the multiple linear power generation modules are mutually offset in the axial direction by 2τ / m, where τ is the motor pole pitch and m is the number of motor phases.

[0014] Furthermore, the movers of the multiple linear power generation modules are arranged in an aligned manner in the axial direction, and the stators of the multiple linear power generation modules are mutually offset in the axial direction by 2τ / m, where τ is the motor pole pitch and m is the number of motor phases.

[0015] The beneficial effects of the present invention are:

[0016] 1. The linear generator for wave energy power generation proposed in the present 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 any phase design can be realized through simple structural arrangement.

[0017] 2. The single-phase linear power generation module used has a higher winding coefficient, short winding ends, high winding utilization, and high permanent magnet utilization of the single-phase linear power generation module. Therefore, the linear generator for wave energy generation based on 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 end effects of each phase are balanced with each other. Therefore, the linear generator for wave energy generation proposed by the present invention does not have the end effect problem of conventional linear motors, thereby ensuring the output power quality.

[0019] 4. The linear generator for wave energy generation proposed by the present invention is completely decoupled between phases, and has high reliability and strong fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0022] Figure 3 The winding distribution diagram of three single-phase stators of the linear generator of the first embodiment of the present invention;

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

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

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

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

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

[0028] Fig. 9 A linear generator rotor support frame according to a third embodiment of the present invention;

[0029] Fig.10 The overall structure of the linear generator according to the fourth embodiment of the present invention;

[0030] Fig.11It is an expanded view of six single-phase linear power generation modules of the linear generator according to the fourth embodiment of the present invention;

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

[0032] Explanation of the figure markings: 1 first phase linear power generation module, 1-1 first phase linear power generation module stator, 1-1-1 first phase linear power generation module stator yoke, 1-1-2 first phase linear power generation module stator teeth, 1-1-3 first phase linear power generation module stator winding, 1-2 first phase linear power generation module mover, 1-2-1 first phase linear power generation module mover N-pole permanent magnet, 1-2-2 first phase linear power generation module mover S-pole permanent magnet, 1-2-3 first phase linear power generation module mover core, 2 second phase linear power generation module, 2-1 second phase linear power generation module stator, 2-1-1 second phase linear power generation module stator yoke, 2-1-2 second phase linear power generation module stator teeth, 2-1-3 second phase linear power generation module stator 2-2 second phase linear power generation module rotor, 2-2-1 second phase linear power generation module rotor N-pole permanent magnet, 2-2-2 second phase linear power generation module rotor S-pole permanent magnet, 2-2-3 second phase linear power generation module rotor core, 3 third phase linear power generation module, 3-1 third phase linear power generation module stator, 3-1-1 third phase linear power generation module stator yoke, 3-1-2 third phase linear power generation module stator teeth, 3-1-3 third phase linear power generation module stator winding, 3-2 third phase linear power generation module rotor, 3-2-1 third phase linear power generation module rotor N-pole permanent magnet, 3-2-2 third phase linear power generation module rotor S-pole permanent magnet, 3-2-3 third phase linear power generation module rotor core, 4 ... Four-phase linear power generation module, 4-1 fourth-phase linear power generation module stator, 4-1-1 fourth-phase linear power generation module stator yoke, 4-1-2 fourth-phase linear power generation module stator teeth, 4-1-3 fourth-phase linear power generation module stator winding, 4-2 fourth-phase linear power generation module mover, 4-2-1 fourth-phase linear power generation module mover N-pole permanent magnet, 4-2-2 fourth-phase linear power generation module mover S-pole permanent magnet, 4-2-3 fourth-phase linear power generation module mover core, 5 fifth-phase linear power generation module, 5-1 fifth-phase linear power generation module stator, 5-1-1 fifth-phase linear power generation module stator yoke, 5-1-2 fifth-phase linear power generation module stator teeth, 5-1-3 fifth-phase linear power generation module stator winding, 5-2 fifth Phase linear power generation module rotor, 5-2-1 fifth phase linear power generation module rotor N-pole permanent magnet, 5-2-2 fifth phase linear power generation module rotor S-pole permanent magnet, 5-2-3 fifth phase linear power generation module rotor core, 6 sixth phase linear power generation module, 6-1 sixth phase linear power generation module stator, 6-1-1 sixth phase linear power generation module stator yoke, 6-1-2 sixth phase linear power generation module stator teeth, 6-1-3 sixth phase linear power generation module stator winding, 6-2 sixth phase linear power generation module rotor, 6-2-1 sixth phase linear power generation module rotor N-pole permanent magnet, 6-2-2 sixth phase linear power generation module rotor S-pole permanent magnet, 6-2-3 sixth phase linear power generation module rotor core, 7 linear generator rotor support frame. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings. For the convenience of explanation, the present invention takes the situation that the number of motor phases m=3, the stators of each phase are arranged in an aligned manner in the axial direction, and the movers of each phase are offset in the axial direction by a certain phase difference as the first embodiment of the present invention; the present invention takes the situation that the number of motor phases m=3, the stators of each phase are offset in the axial direction by a certain phase difference, and the movers of each phase are arranged in an aligned manner in the axial direction as the second embodiment of the present invention; the present invention takes the situation that the number of motor phases m=6, the stators of each phase are arranged in an aligned manner in the axial direction, and the movers of each phase are offset in the axial direction by a certain phase difference as the third embodiment of the present invention; the present invention takes the situation that the number of motor phases m=6, the stators of each phase are offset in the axial direction by a certain phase difference, and the movers of each phase are arranged in an aligned manner in the axial direction as the fourth embodiment of the present invention; the present invention takes the situation that the number of motor phases m=3, and the windings of each phase adopt a single-layer winding as the fifth embodiment of the present invention.

[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. It can be seen that the linear generator includes a first-phase linear power generation module 1, a second-phase linear power generation module 2, a third-phase linear power generation module 3 and a linear generator rotor support frame 7. Among them, the linear generator rotor support frame 7 is a prismatic structure, such as Figure 4 As shown, the number of faces on its side is equal to the number of motor phases m. 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 fixedly mounted on the side of the linear generator rotor support frame 7 through the first phase linear power generation module rotor core 1-2-3, the second phase linear power generation module rotor core 2-2-3 and the third phase linear power generation module rotor core 3-2-3 respectively. One phase is installed on each side, and the moving direction of the rotor is consistent with the axial direction of the linear generator rotor 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 is composed 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 is composed 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 is composed 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 power generation proposed in the present invention is integrated with multiple single-phase linear power generation modules. Each phase is modularly designed, with simple structure and process, flexible and convenient design, and any phase design can be realized through simple structural arrangement. Moreover, the phases of the motor are completely decoupled, with high reliability and strong fault tolerance. At the same time, the end effects of each phase based on the modular integration of multiple single-phase linear power generation modules are balanced with each other. Therefore, the linear generator for wave energy power generation proposed in the present invention does not have the end effect problem of conventional linear motors, thereby ensuring the output power quality.

[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 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 stator teeth 1-1-2 of the first phase linear power generation module, the stator teeth 2-1-2 of the second phase linear power generation module and the stator teeth 3-1-2 of the third phase linear power generation module are respectively arranged on the stator yoke 1-1-1 of the first phase linear power generation module, the stator yoke 2-1-1 of the second phase linear power generation module and the stator yoke 3-1-1 of the third phase linear power generation module, and the stator winding 1-1-3 of the first phase linear power generation module, the stator winding 2-1-3 of the second phase linear power generation module and the stator winding 3-1-3 of the third phase linear power generation module are all centralized windings and are respectively wound on the stator teeth 1-1-2 of the first phase linear power generation module, the stator teeth 2-1-2 of the second phase linear power generation module and the stator teeth 3-1-2 of the third phase linear power generation module, as shown in FIG. Figure 3 The single-phase linear power generation module used has a higher winding coefficient, short winding ends and high winding utilization.

[0038] Depend on Figure 2It can also be known that the first phase linear power generation module rotor 1-2 is composed of the first phase linear power generation module rotor N-pole permanent magnet 1-2-1, the first phase linear power generation module rotor S-pole permanent magnet 1-2-2 and the first phase linear power generation module rotor iron core 1-2-3; the second phase linear power generation module rotor 2-2 is composed of the second phase linear power generation module rotor N-pole permanent magnet 2-2-1, the second phase linear power generation module rotor S-pole permanent magnet 2-2-2 and the second phase linear power generation module rotor iron core 2-2-3; the third phase linear power generation module rotor 3-2 is composed of the third phase linear power generation module rotor N-pole permanent magnet 3-2-1, the third phase linear power generation module rotor S-pole permanent magnet 3-2-2 and the third phase linear power generation module rotor iron core 3-2-3. The first phase linear power generation module rotor N-pole permanent magnet 1-2-1 and the first phase linear power generation module rotor S-pole permanent magnet 1-2-2 are alternately arranged on the first phase linear power generation module rotor iron core 1-2-3; the second phase linear power generation module rotor N-pole permanent magnet 2-2-1 and the second phase linear power generation module rotor S-pole permanent magnet 2-2-2 are alternately arranged on the second phase linear power generation module rotor iron core 2-2-3; the third phase linear power generation module rotor N-pole permanent magnet 3-2-1 and the third phase linear power generation module rotor S-pole permanent magnet 3-2-2 are alternately arranged on the third phase linear power generation module rotor iron core 3-2-3. The single-phase linear power generation module has a high permanent magnet utilization rate. 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.

[0039] Furthermore, the stator 1-1 of the first phase linear power generation module, the stator 2-1 of the second phase linear power generation module and the stator 3-1 of the third phase linear power generation module are arranged in alignment in the axial direction, while the mover 1-2 of the first phase linear power generation module, the mover 2-2 of the second phase linear power generation module and the mover 3-2 of the third phase linear power generation module are offset from each other in the axial direction by 2τ / 3, where τ is the motor pole pitch, i.e., the first phase linear power generation module 1 leads the second phase linear power generation module 2 by one hundred and twenty electrical degrees, and the second phase linear power generation module 2 leads the third phase linear power generation module 3 by one hundred and twenty electrical degrees.

[0040] A 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 motor phase number of this embodiment is the same as that of the first embodiment, and the overall structure is similar to that of the first embodiment. The main difference is that the stator 1-1 of the first phase linear power generation module, the stator 2-1 of the second phase linear power generation module, and the stator 3-1 of the third phase linear power generation module are axially offset by 2τ / 3, where τ is the motor pole pitch, and the mover 1-2 of the first phase linear power generation module, the mover 2-2 of the second phase linear power generation module, and the mover 3-2 of the third phase linear power generation module are axially aligned, as shown. Figure 6As shown, the first phase linear power generation module 1 leads the second phase linear power generation module 2 by 120 electrical degrees, and the second phase linear power generation module 2 leads the third phase linear power generation module 3 by 120 electrical degrees. The winding distribution diagram of the three single-phase stators of this embodiment is shown in FIG. Figure 3 shown.

[0041] A 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. The number of motor phases in this embodiment is m=6. It can be seen that the linear generator includes a first-phase linear power generation module 1, a second-phase linear power generation module 2, a third-phase linear power generation module 3, a fourth-phase linear power generation module 4, a fifth-phase linear power generation module 5, a sixth-phase linear power generation module 6 and a linear generator rotor support frame 7. Among them, the linear generator rotor support frame 7 is a prismatic structure, such as Fig. 9 As shown, the number of faces on its side is equal to the number of motor phases m. 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 respectively fixedly mounted on the side of the linear generator rotor support frame 7 through the first phase linear power generation module rotor core 1-2-3, the second phase linear power generation module rotor core 2-2-3, the third phase linear power generation module rotor core 3-2-3, the fourth phase linear power generation module rotor core 4-2-3, the fifth phase linear power generation module rotor core 5-2-3 and the sixth phase linear power generation module rotor core 6-2-3, and the rotor moving direction is consistent with the axis direction of the linear generator rotor support frame 7.

[0042] Further, 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 is composed of the first phase linear power generation module stator 1-1 and the first phase linear power generation module mover 1-2; the second phase linear power generation module 2 is composed of the second phase linear power generation module stator 2-1 and the second phase linear power generation module mover 2-2; the third phase linear power generation module 3 is composed of the third phase linear power generation module stator 3-1 and the third phase linear power generation module mover 3-2; the fourth phase linear power generation module 4 is composed of the fourth phase linear power generation module stator 4-1 and the fourth phase linear power generation module mover 4-2; the fifth phase linear power generation module 5 is composed of the fifth phase linear power generation module stator 5-1 and the fifth phase linear power generation module mover 5-2; the sixth phase linear power generation module 6 is composed of the sixth phase linear power generation module stator 6-1 and the sixth phase linear power generation module mover 6-2.

[0043] In addition, 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 power generation module stator 4-1 is composed of a fourth-phase linear power generation module stator yoke 4-1-1, a fourth-phase linear power generation module stator teeth 4-1-2 and a fourth-phase linear power generation module stator winding 4-1-3; the fifth-phase linear power generation module stator 5-1 is composed of a fifth-phase linear power generation module stator yoke 5-1-1, a fifth-phase linear power generation module stator teeth 5-1-2 and a fifth-phase linear power generation module stator winding 5-1-3; the sixth-phase linear power generation module stator 6-1 is composed of a sixth-phase linear power generation module stator yoke 6-1-1, a sixth-phase linear power generation module stator teeth 6-1-2 and a sixth-phase linear power generation module stator winding 6-1-3. The stator teeth 1-1-2 of the first phase linear power generation module, the stator teeth 2-1-2 of the second phase linear power generation module, the stator teeth 3-1-2 of the third phase linear power generation module, the stator teeth 4-1-2 of the fourth phase linear power generation module, the stator teeth 5-1-2 of the fifth phase linear power generation module and the stator teeth 6-1-2 of the sixth phase linear power generation module are respectively arranged on the stator yoke 1-1-1 of the first phase linear power generation module, the stator yoke 2-1-1 of the second phase linear power generation module, the stator yoke 3-1-1 of the third phase linear power generation module, the stator yoke 4-1-1 of the fourth phase linear power generation module, the stator yoke 5-1-1 of the fifth phase linear power generation module and the stator yoke 6-1-1 of the sixth phase linear power generation module, and the first phase linear power generation module The stator winding 1-1-3 of the electric module, the stator winding 2-1-3 of the second phase linear power generation module, the stator winding 3-1-3 of the third phase linear power generation module, the stator winding 4-1-3 of the fourth phase linear power generation module, the stator winding 5-1-3 of the fifth phase linear power generation module and the stator winding 6-1-3 of the sixth phase linear power generation module are all centralized windings, and are respectively wound on the stator teeth 1-1-2 of the first phase linear power generation module, the stator teeth 2-1-2 of the second phase linear power generation module, the stator teeth 3-1-2 of the third phase linear power generation module, the stator teeth 4-1-2 of the fourth phase linear power generation module, the stator teeth 5-1-2 of the fifth phase linear power generation module and the stator teeth 6-1-2 of the sixth phase linear power generation module, as shown in FIG. Figure 3 shown.

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

[0045] Furthermore, the first phase linear power generation module stator 1-1, the second phase linear power generation module stator 2-1, the third phase linear power generation module stator 3-1, the fourth phase linear power generation module stator 4-1, the fifth phase linear power generation module stator 5-1 and the sixth phase linear power generation module stator 6-1 are arranged in an axially aligned manner, while the first phase linear power generation module mover 1-2, the second phase linear power generation module mover 2-2, the third phase linear power generation module mover 3-2, the fourth phase linear power generation module mover 4-2, the fifth phase linear power generation module mover 5-2 and the sixth phase linear power generation module mover 6-2 are axially offset. Figure 8 . Among them, the first phase linear power generation module mover 1-2, the second phase linear power generation module mover 2-2 and the third phase linear power generation module mover 3-2 constitute a three-phase module, which are mutually offset by 2τ / 3 in the axial direction; the fourth phase linear power generation module mover 4-2, the fifth phase linear power generation module mover 5-2 and the sixth phase linear power generation module mover 6-2 constitute another three-phase module, which are mutually offset by 2τ / 3 in the axial direction; these two three-phase modules are mutually offset by τ / m. That is to say, the first phase linear power generation module 1 leads the second phase linear power generation module 2 by 120 electrical degrees, and the second phase linear power generation module 2 leads the third phase linear power generation module 3 by 120 electrical degrees; the fourth phase linear power generation module 4 leads the fifth phase linear power generation module 5 by 120 electrical degrees, and the fifth phase linear power generation module 5 leads the sixth phase linear power generation module 6 by 120 electrical degrees; the electrical angle of the first phase linear power generation module 1 leading the fourth phase linear power generation module 4 is 180° / m, where m is the number of motor phases.

[0046] In addition, by Figure 7 and Figure 8 It can be seen that the arrangement order of the single-phase linear power generation modules in the counterclockwise direction is the first-phase linear power generation module 1, the fifth-phase linear power generation module 5, the second-phase linear power generation module 2, the fourth-phase linear power generation module 4, the third-phase linear power generation module 3 and the sixth-phase linear power generation module 6. This arrangement order is conducive to suppressing the circumferential torsional moment acting on the linear generator rotor 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: Fig.10As shown. The number of motor phases of this embodiment is the same as that of the third embodiment, and the overall structure is similar to that of the third embodiment. The main difference is that the first phase linear power generation module mover 1-2, the second phase linear power generation module mover 2-2, the third phase linear power generation module mover 3-2, the fourth phase linear power generation module mover 4-2, the fifth phase linear power generation module mover 5-2 and the sixth phase linear power generation module mover 6-2 are arranged in an axial direction, while the first phase linear power generation module stator 1-1, the second phase linear power generation module stator 2-1, the third phase linear power generation module stator 3-1, the fourth phase linear power generation module stator 4-1, the fifth phase linear power generation module stator 5-1 and the sixth phase linear power generation module stator 6-1 are axially offset. Fig.11 . Among them, the first phase linear power generation module stator 1-1, the second phase linear power generation module stator 2-1 and the third phase linear power generation module stator 3-1 constitute a three-phase module, which are mutually offset by 2τ / 3 in the axial direction; the fourth phase linear power generation module stator 4-1, the fifth phase linear power generation module stator 5-1 and the sixth phase linear power generation module stator 6-1 constitute another three-phase module, which are mutually offset by 2τ / 3 in the axial direction; these two three-phase modules are mutually offset by τ / m. That is to say, the first phase linear power generation module 1 leads the second phase linear power generation module 2 by 120 electrical degrees, and the second phase linear power generation module 2 leads the third phase linear power generation module 3 by 120 electrical degrees; the fourth phase linear power generation module 4 leads the fifth phase linear power generation module 5 by 120 electrical degrees, and the fifth phase linear power generation module 5 leads the sixth phase linear power generation module 6 by 120 electrical degrees; the electrical angle of the first phase linear power generation module 1 leading the fourth phase linear power generation module 4 is 180° / m, where m is the number of motor phases.

[0048] In addition, by Fig.10 and Fig.11 It can be seen that the arrangement order of the single-phase linear power generation modules in the counterclockwise direction is the first-phase linear power generation module 1, the fifth-phase linear power generation module 5, the second-phase linear power generation module 2, the fourth-phase linear power generation module 4, the third-phase linear power generation module 3 and the sixth-phase linear power generation module 6. This arrangement order is conducive to suppressing the circumferential torsional moment acting on the linear generator rotor support frame 7.

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

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

Claims

1. A linear generator for wave energy generation, comprising a plurality of linear power generation modules and a linear generator rotor support frame; the linear generator rotor support frame is a prismatic structure, the number of faces on its side is equal to the number of motor phases m; a plurality of phase linear power generation modules are respectively fixedly mounted on the side of the linear generator rotor support frame through the linear power generation module rotor core, and the moving direction of the rotor is consistent with the axial direction of the linear generator rotor support frame.

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

3. The linear generator for wave energy generation according to claim 1, Features: Each linear power generation module consists of a linear power generation module stator and a linear power generation module mover.

4. The linear generator for wave energy generation according to claim 3, Features: The linear power generation module stator is composed of a linear power generation module stator yoke, a linear power generation module stator teeth and a linear power generation module stator winding.

5. The linear generator for wave energy generation according to claim 4, Features: The stator teeth of the linear power generation module are arranged 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.

6. The linear generator for wave energy generation according to claim 4, Features: The stator winding of the linear power generation module adopts a single-layer winding form.

7. The linear generator for wave energy generation according to claim 3, Features: The linear power generation module mover is composed 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 iron core.

8. The linear generator for wave energy generation according to claim 7, Features: The linear power generation module mover N-pole permanent magnet and the linear power generation module mover S-pole permanent magnet are alternately distributed on the linear power generation module mover iron core.

9. The linear generator for wave energy generation according to claim 3, Features: The stators of the multiple linear power generation modules are arranged in an aligned manner in the axial direction, and the movers of the multiple linear power generation modules are mutually offset by 2τ / m in the axial direction, where τ is the motor pole pitch and m is the number of motor phases.

10. The linear generator for wave energy generation according to claim 3, Features: The movers of the multiple linear power generation modules are arranged in an aligned manner in the axial direction, and the stators of the multiple linear power generation modules are mutually offset by 2τ / m in the axial direction, where τ is the motor pole pitch and m is the number of motor phases.

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