Energy collection method of hydroelectric generating set
By constructing a permanent magnet magnetic field and rectifier mechanism in the hydroelectric generator set, the problem of voltage fluctuation caused by load changes was solved, adaptive impedance matching and efficient energy harvesting were achieved, and the active power output was improved.
Patent Information
- Application Number
- CN202610058469.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-16
- Publication Date
- 2026-04-17
AI Technical Summary
When the load changes dynamically, voltage fluctuations in traditional hydroelectric generator sets lead to an increase in reactive power and a decrease in the proportion of active power output, making it impossible to adjust the equivalent impedance in real time.
By constructing two permanent magnets in the generator set to form a first magnetic field, using bevel gears to drive coils to cut magnetic lines of force to generate induced current, and generating excitation current through a rectifier mechanism, a second magnetic field is constructed to adjust the impedance, thus achieving self-consistent current phase matching.
It achieves adaptive impedance matching, reduces reactive power, increases the proportion of effective power output, and enhances electromagnetic stability and energy harvesting efficiency.
Smart Images
Figure CN121886828A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of hydroelectric generator set technology, and more specifically, to a method for energy harvesting from a hydroelectric generator set. Background Technology
[0002] In traditional hydroelectric generator systems, energy conversion efficiency is always constrained by both physical mechanisms and structural limitations. While the method of using mechanical energy to drive a rotor to rotate and cut a fixed magnetic field to generate induced current to power the equipment is stable and reliable, the impedance characteristics of a hydroelectric generator are determined by its physical structure. It cannot adjust the equivalent impedance in real time according to dynamic load changes. When the load changes dynamically, the voltage at the hydroelectric generator terminals fluctuates. To maintain voltage stability, an external power supply is typically used to regulate the excitation current. However, this generates a large amount of reactive power, leading to a reduction in the proportion of active power output. Summary of the Invention
[0003] The technical objective of this invention is to address the shortcomings of the prior art by providing an energy harvesting method for hydroelectric generator sets that facilitates adaptive impedance matching, reduces reactive power, and increases the effective power output ratio.
[0004] The technical solution adopted in this invention is as follows: A method for harvesting energy from a hydroelectric generator set, the method comprising the following steps: S1. Two permanent magnets are installed on the inner wall of the generator casing along the axial direction of the main shaft of the hydroelectric generator set to construct the first magnetic field; S2. A bevel gear is provided on the main shaft located between two permanent magnets. The bevel gear rotates with the main shaft. A plurality of first coils are connected to the bevel gear. The first coils rotate with the bevel gear and cut magnetic lines of force in the first magnetic field, generating a first induced electromotive force and outputting a first alternating current. S3. A first rectifier mechanism is set up to transmit the first alternating current to the first rectifier mechanism, and the first rectifier mechanism rectifies the first alternating current to obtain the excitation current; S4. Multiple excitation coils are arranged circumferentially around the main shaft on the inner wall of the generator housing. The first rectifier mechanism passes the excitation current into the excitation coils to construct a second magnetic field. S5. A plurality of second coils are arranged on a main shaft located between the plurality of excitation coils. The second coils rotate synchronously with the main shaft, cut magnetic lines of force in the second magnetic field, generate a second electromotive force and output a second alternating current. S6. A second rectifier mechanism is provided to transmit the second AC current to the second rectifier mechanism, and the second rectifier mechanism rectifies the second AC current to obtain DC power and supplies power to downstream control equipment.
[0005] The above-mentioned technical measures utilize two permanent magnets to construct a first magnetic field. When the main shaft rotates, the bevel gear rotates accordingly, thereby driving the first coil to cut magnetic lines of force within the first magnetic field, generating a first induced electromotive force and outputting a first alternating current. The first alternating current is transmitted to the first rectifier mechanism for rectification to obtain an excitation current. This excitation current is then fed into the excitation coil to construct a second magnetic field. When the main shaft rotates, the second coil rotates accordingly, cutting magnetic lines of force within the second magnetic field, generating a second induced electromotive force and outputting a second alternating current. This second alternating current is transmitted to the second rectifier mechanism for rectification to obtain a self-flowing power supply, which can then supply power to downstream control equipment.
[0006] The above-mentioned technical measures use a "magnetic-electrical-magnetic-magnetic-electrical" approach. The first alternating current generated by the first magnetic field is rectified and used as the excitation current. This ensures that the phase of the second alternating current generated by the second magnetic field is always consistent with the change in the magnetic field, achieving better impedance matching, thereby reducing reactive power and increasing the effective power output ratio.
[0007] The above-mentioned technical measures utilize two permanent magnets to construct the first magnetic field, which can form a constant magnetic field with uniform distribution and stable direction within the axial range of the main shaft.
[0008] Furthermore, the permanent magnet is coaxially arranged on the main shaft via bearings.
[0009] In the above-mentioned technical measures, the permanent magnet is arranged on the main shaft through bearings, which enables the main shaft to rotate more stably, while ensuring that the permanent magnet does not rotate and remains stationary, thereby reducing the influence of the main shaft on the permanent magnet.
[0010] Furthermore, one end of the first coil is close to the center of the main shaft, and the other end is close to the outer edge of the permanent magnet.
[0011] The above-mentioned technical measures can increase the cutting range within the first magnetic field and improve energy harvesting efficiency.
[0012] Furthermore, in step S3, the specific steps for transmitting the first alternating current to the first rectifier mechanism are as follows: A first slip ring mechanism is provided on the first coil, and the first alternating current output by the first coil is transmitted to the first rectifier mechanism through the first slip ring mechanism.
[0013] The above-mentioned technical measures, by utilizing the first slip ring mechanism, can stably and effectively transmit the first alternating current.
[0014] Furthermore, the first slip ring mechanism includes a central slip ring and an edge slip ring; The center slip ring and the edge slip ring are respectively connected to the two ends of the first coil; The central slip ring and the edge slip ring are respectively connected to the first brush, and the two first brushes are respectively connected to the first rectifier mechanism through wires.
[0015] The above-mentioned technical measures connect the two ends of the first coil through the central slip ring and the edge slip ring respectively to form a complete circuit, which helps to ensure the stability and consistency of the conductive path. The first brush transmits the first AC current to the first rectifier mechanism through the wire. Since the rotation frequency of each first coil is the same and the wiring method is the same, the direction of the first AC current transmitted by each first brush is the same, which helps to avoid phase interference and electrical imbalance.
[0016] Furthermore, a coil support is provided on the main shaft located between the plurality of excitation coils, and the plurality of second coils are disposed on the coil support and are evenly arranged around the main shaft in a circumferential manner.
[0017] The above-mentioned technical measures facilitate the installation of the second coil by setting up a coil support; multiple second coils are evenly arranged around the main shaft, making the output voltage of each second coil more stable, which helps to reduce ripple and makes the DC smoother after rectification.
[0018] Furthermore, a magnetic separator is provided between the first coil and the excitation coil.
[0019] The above-mentioned technical measures, by setting up a magnetic barrier layer, help to shield the possible cross magnetic flux between the first magnetic field and the second magnetic field, suppress electromagnetic interference between the first magnetic field and the second magnetic field, and improve electromagnetic stability and magnetic field output purity.
[0020] Furthermore, in step S6, the specific steps for transmitting the second alternating current to the second rectifier mechanism are as follows: A second slip ring mechanism is provided on the second coil, and the second AC current output by the second coil is transmitted to the second rectifier mechanism through the second slip ring mechanism.
[0021] The above-mentioned technical measures, by utilizing the second slip ring mechanism, can stably and effectively transmit the second alternating current.
[0022] Furthermore, the second slip ring mechanism includes a first slip ring and a second slip ring; The first slip ring and the second slip ring are respectively connected to the two ends of the second coil; The first slip ring and the second slip ring are respectively connected to the second brush, and the two second brushes are respectively connected to the second rectifier mechanism through wires.
[0023] The above-mentioned technical measures connect the two ends of the second coil through the first slip ring and the second slip ring respectively to form a complete circuit, which helps to ensure the stability and consistency of the conductive path. The second brush transmits the second AC current to the second rectifier mechanism through the wire. Since the rotation frequency of each second coil is the same and the wiring method is the same, the direction of the second AC current transmitted by each second brush is the same, which helps to avoid phase interference and electrical imbalance.
[0024] Furthermore, the bevel gear includes two driving gears coaxially arranged on the main shaft and a plurality of driven gears arranged between the two driving gears. The teeth of the two driving gears are opposite, and the driven gears mesh with the two driving gears respectively. When the main shaft rotates, the two driving wheels rotate with the main shaft, and the two driving wheels rotate in opposite directions, while the driven wheel rotates around its own axis. The first coil is connected to the driven wheel.
[0025] The above-mentioned technical measures utilize bevel gears to rotate the first coil, thereby increasing the rotational speed of the first coil, effectively enhancing the rate of change of magnetic flux, and thus increasing the amplitude of the induced voltage, which is beneficial to improving energy harvesting efficiency.
[0026] One or more technical solutions provided by this invention have at least the following technical effects or advantages: This invention utilizes two permanent magnets to construct a first magnetic field. When the main shaft rotates, the bevel gear rotates accordingly, thereby driving a first coil to cut magnetic lines of force within the first magnetic field, generating a first induced electromotive force and outputting a first alternating current. The first alternating current is transmitted to a first rectifier mechanism for rectification to obtain an excitation current. This excitation current is then fed into an excitation coil to construct a second magnetic field. When the main shaft rotates, the second coil rotates accordingly, cutting magnetic lines of force within the second magnetic field, generating a second induced electromotive force and outputting a second alternating current. This second alternating current is transmitted to a second rectifier mechanism for rectification to obtain a self-flowing power supply, which can then power downstream control equipment.
[0027] This invention utilizes a "magnetic-electrical-magnetic-magnetic-electrical" method. The first alternating current generated by the first magnetic field is rectified and used as the excitation current. This ensures that the phase of the second alternating current generated by the second magnetic field is always consistent with the magnetic field change, achieving better impedance matching, thereby reducing reactive power and increasing the effective power output ratio. The first magnetic field is constructed using two permanent magnets, which can form a uniformly distributed and directionally stable constant magnetic field within the axial range of the main shaft. Attached Figure Description
[0028] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. Figure 1 This is a schematic flowchart of the energy harvesting method in this invention; Figure 2 This is a schematic diagram of the energy harvesting device in this invention; Figure 3 This is a schematic diagram of the connection structure between the bevel gear and the first coil in this invention; Figure 4 This is a schematic diagram of the connection structure between the second coil and the coil support in this invention; Among them, 1-main shaft; 2-permanent magnet; 3-bevel gear; 31-driving wheel; 32-driven wheel; 4-first coil; 5-first rectifier mechanism; 6-excitation coil; 7-second coil; 8-second rectifier mechanism; 9-bearing; 10-center slip ring; 11-edge slip ring; 12-first brush; 13-coil bracket; 14-magnetic separator; 15-first slip ring; 16-second slip ring; 17-second brush. Detailed Implementation
[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.
[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.
[0031] Reference Figure 1 This embodiment provides an energy harvesting method for a hydroelectric generator set, which includes the following steps: S1. Two permanent magnets 2 are installed on the inner wall of the generator casing along the axial direction of the main shaft 1 of the hydroelectric generator set to construct the first magnetic field; In this configuration, the permanent magnet 2 is coaxially arranged on the main shaft 1 via a bearing 9, which can be a deep groove ball bearing. The permanent magnet 2 is connected to the outer ring of the deep groove ball bearing, and the main shaft 1 is connected to the inner ring of the deep groove ball bearing. The magnetic field direction of the first magnetic field constructed by the two permanent magnets 2 is perpendicular to the axis of the main shaft 1, and the magnetic field direction is from the N pole of the permanent magnet 2 to the S pole, distributed along the axial direction of the main shaft 1. The permanent magnet 2 is preferably made of neodymium iron boron material, which is beneficial to achieving high remanence and high coercivity, and constructing a stable and constant magnetic field.
[0032] S2. A bevel gear 3 is set on the main shaft 1 located between the two permanent magnets 2. The bevel gear 3 rotates with the main shaft 1. Multiple first coils 4 are connected to the bevel gear 3. The first coils 4 rotate with the bevel gear 3 and cut magnetic lines of force in the first magnetic field, generating a first induced electromotive force and outputting a first alternating current. One end of the first coil 4 is close to the center of the main shaft 1, and the other end is close to the outer edge of the permanent magnet 2.
[0033] The bevel gear 3 includes two driving gears 31 arranged coaxially on the main shaft 1 and a plurality of driven gears 32 arranged between the two driving gears 31. The teeth of the two driving gears 31 are opposite, and the driven gears 32 mesh with the two driving gears 31 respectively. When the main shaft 1 rotates, the two driving wheels 31 rotate with the main shaft 1, and the two driving wheels 31 rotate in opposite directions, while the driven wheel 32 rotates around its own axis. The first coil 4 is connected to the driven wheel 32.
[0034] In detail, there are four first coils 4, and the four first coils 4 are arranged at equal intervals along the circumference of the driving wheel 31, with a 90° angle between adjacent first coils 4; the rotation axis of the driving wheel 31 is at a 90° angle with the axis of the main shaft 1; corresponding to the magnetic field direction of the first magnetic field, which is conducive to realizing the all-round and efficient cutting of the rotating magnetic flux.
[0035] Furthermore, the ratio of the number of gears in the driven wheel 32 to the number of gears in the driving wheel 31 is 1:5. When the main shaft 1 rotates, the driving wheel 31 rotates accordingly, causing the driven wheel 32 to rotate at an angular velocity five times that of the driving wheel 31, thereby driving the first coil 4 to move in the first magnetic field at a higher angular velocity.
[0036] S3. A first rectifier mechanism 5 is set up to transmit the first alternating current to the first rectifier mechanism 5. The first rectifier mechanism 5 rectifies the first alternating current to obtain the excitation current. In step S3, the specific steps for transmitting the first alternating current to the first rectifier mechanism 5 are as follows: A first slip ring mechanism is provided on the first coil 4, and the first AC current output by the first coil 4 is transmitted to the first rectifier mechanism 5 through the first slip ring mechanism.
[0037] The first slip ring mechanism includes a central slip ring 10 and an edge slip ring 11; The center slip ring 10 and the edge slip ring 11 are respectively connected to the two ends of the first coil 4; The center slip ring 10 and the edge slip ring 11 are respectively connected to the first brush 12, and the two first brushes 12 are respectively connected to the first rectifier mechanism 5 through wires.
[0038] In detail, the center slip ring 10 and the edge slip ring 11 each have a rotating part and a stationary part that are electrically connected to each other. The rotating part can rotate relative to the stationary part. The stationary part is connected to the first brush 12, and the rotating part is connected to the first coil 4.
[0039] The first rectifier mechanism 5 includes a bridge rectifier circuit and a filter capacitor connected in parallel at the output of the bridge rectifier circuit. The bridge rectifier circuit is connected to the first brush 12 and can convert the first AC current into DC current. The filter capacitor is then used to reduce ripple and obtain a stable excitation current.
[0040] S4. Multiple excitation coils 6 are arranged circumferentially around the main shaft 1 on the inner wall of the generator housing. The first rectifier mechanism 5 passes the excitation current into the excitation coils 6 to construct a second magnetic field. There are 8 excitation coils 6, which are arranged at equal intervals. Each excitation coil 6 is wound with high permeability insulated copper wire. The wire diameter is determined according to the current capacity and can be 0.8mm. The number of turns of each excitation coil 6 is controlled between 120 and 150 to ensure that the magnetic field strength and energy density are within the effective range.
[0041] The first rectifier 5 can directly output the excitation current to the excitation coil 6, or it can be connected to an energy storage mechanism that stores current and supplies power, so that the excitation current is supplied to the excitation coil 6 through the energy storage mechanism.
[0042] S5. Multiple second coils 7 are set on the main shaft 1 located between multiple excitation coils 6. The second coils 7 rotate synchronously with the main shaft 1, cutting magnetic lines of force in the second magnetic field, generating a second electromotive force and outputting a second alternating current. A coil support 13 is provided on the main shaft 1 located between multiple excitation coils 6, and multiple second coils 7 are arranged on the coil support 13 and evenly distributed around the main shaft 1. There are 6 second coils 7.
[0043] In detail, the coil support 13 is made of high-strength corrosion-resistant alloy material, which has good structural rigidity and fatigue resistance.
[0044] The length of the second coil 7 extends along the axial direction of the main shaft 1, increasing the cutting range of the magnetic lines of force.
[0045] S6. A second rectifier mechanism 8 is set up to transmit the second AC current to the second rectifier mechanism 8. The second rectifier mechanism 8 rectifies the second AC current to obtain DC power and supplies power to downstream control equipment.
[0046] In step S6, the specific steps for transmitting the second alternating current to the second rectifier mechanism 8 are as follows: A second slip ring mechanism is provided on the second coil 7, and the second AC current output by the second coil 7 is transmitted to the second rectifier mechanism 8 through the second slip ring mechanism.
[0047] The second slip ring mechanism includes a first slip ring 15 and a second slip ring 16; The first slip ring 15 and the second slip ring 16 are respectively connected to the two ends of the second coil 7; The first slip ring 15 and the second slip ring 16 are respectively connected to the second brush 17, and the two second brushes 17 are respectively connected to the second rectifier mechanism 8 through wires.
[0048] In detail, the first slip ring 15 and the second slip ring 16 each have a rotating part and a stationary part that are electrically connected to each other. The rotating part can rotate relative to the stationary part. The stationary part is connected to the second brush 17, and the rotating part is connected to the second coil 7.
[0049] The second rectifier mechanism 8 includes a bridge rectifier circuit and a filter capacitor connected in parallel at the output of the bridge rectifier circuit. The bridge rectifier circuit is connected to the second brush 17 and can convert the second AC current into DC current, and then use the filter capacitor to reduce ripple.
[0050] A magnetic separator 14 is provided between the first coil 4 and the excitation coil 6.
[0051] The magnetic shielding layer 14 is a ring structure made of a low magnetic permeability material, such as aluminum alloy, copper, or a composite structure with a slotted structure, which has high magnetic resistance characteristics.
[0052] Specifically, the magnetic isolation 14 can be fixed to the inner wall of the generator housing and can be passed through by the main shaft 1.
[0053] In this embodiment, the magnetic field direction of the first magnetic field is parallel to the axis of the main shaft 1, and the magnetic field direction of the second magnetic field is perpendicular to the axis of the main shaft 1. That is, the first magnetic field and the second magnetic field are arranged at 90° orthogonal. According to the principle of magnetic flux projection, the interference magnetic flux of the first magnetic field on the excitation coil is:
[0054] in, The magnetic induction intensity of the first magnetic field. The effective area of the excitation coil. Let be the angle between the directions of the first and second magnetic fields. When hour, , thus Φ 干扰 =0 indicates that the first magnetic field will not produce an effective magnetic flux projection in the excitation coil.
[0055] According to Faraday's law of electromagnetic induction, redundant induced electromotive force:
[0056] Where t is time and N2 is the number of coil turns.
[0057] Φ干扰 =0, that is, E 耦合 =0, meaning that the first magnetic field will not induce electromotive force disturbance in the second magnetic field, effectively preventing signal distortion, harmonic fluctuations and energy loss caused by magnetic coupling, and improving the electromagnetic stability and output purity of the system.
[0058] By vertically arranging the first and second magnetic fields and combining them with the magnetic barrier 14, efficient decoupling and interference suppression between the two magnetic fields are achieved, effectively improving energy conversion efficiency, stability and electromagnetic compatibility performance.
[0059] Based on the above energy harvesting method, this embodiment also provides an energy harvesting device that applies the above energy harvesting method, referring to... Figures 2-4 The energy harvesting device includes two permanent magnets 2 mounted on a main shaft 1 via bearings 9. A bevel gear 3 is mounted on the main shaft 1 between the two permanent magnets 2. A first coil 4 is connected to the driven wheel 32 of the bevel gear 3. A central slip ring 10 and an outer slip ring 11 are connected to the two ends of the first coil 4 respectively. A first brush 12 is connected to the central slip ring 10 and the outer slip ring 11 respectively. The two first brushes 12 are connected to a first rectifier mechanism 5 via wires. The energy harvesting device also includes eight excitation coils 6 disposed on the inner wall of the generator housing and equidistantly distributed around the main shaft 1. A coil support 13 is connected to the main shaft 1 between the eight excitation coils 6. The coil support 13 is provided with second coils 7 evenly arranged around the main shaft 1. The two ends of the second coils 7 are respectively connected to a first slip ring 15 and a second slip ring 16. Second brushes 17 are respectively connected to the first slip ring 15 and the second slip ring 16. The two second brushes 17 are respectively connected to a second rectifier mechanism 8 through wires.
[0060] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.
[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A method for energy harvesting from a hydroelectric generator set, characterized in that: The energy harvesting method includes the following steps: S1. Two permanent magnets (2) are arranged axially along the main shaft (1) of the hydroelectric generator set on the inner wall of the generator casing to construct the first magnetic field; S2. A bevel gear (3) is provided on the main shaft (1) located between two permanent magnets (2). The bevel gear (3) rotates with the main shaft (1). A plurality of first coils (4) are connected on the bevel gear (3). The first coils (4) rotate with the bevel gear (3) and cut magnetic lines of force in the first magnetic field, generating a first induced electromotive force and outputting a first alternating current. S3. Set a first rectifier (5) to transmit the first AC current to the first rectifier (5), and the first rectifier (5) rectifies the first AC current to obtain the excitation current; S4. Multiple excitation coils (6) are arranged circumferentially around the main shaft (1) on the inner wall of the generator housing. The first rectifier (5) passes the excitation current into the excitation coils (6) to construct a second magnetic field. S5. A plurality of second coils (7) are arranged on the main shaft (1) located between the plurality of excitation coils (6). The second coils (7) rotate synchronously with the main shaft (1) to cut magnetic lines of force in the second magnetic field, generate a second electromotive force and output a second alternating current; S6. Set a second rectifier (8) to transmit the second AC current to the second rectifier (8), and the second rectifier (8) rectifies the second AC current to obtain a DC power supply and supplies power to the downstream control equipment.
2. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: The permanent magnet (2) is coaxially arranged on the main shaft (1) via a bearing (9).
3. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: One end of the first coil (4) is close to the center of the main shaft (1), and the other end is close to the outer edge of the permanent magnet (2).
4. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: In step S3, the specific steps for transmitting the first alternating current to the first rectifier (5) are as follows: A first slip ring mechanism is provided on the first coil (4), and the first AC current output by the first coil (4) is transmitted to the first rectifier mechanism (5) through the first slip ring mechanism.
5. The energy harvesting method for a hydroelectric generator set according to claim 4, characterized in that: The first slip ring mechanism includes a central slip ring (10) and an edge slip ring (11). The central slip ring (10) and the edge slip ring (11) are respectively connected to the two ends of the first coil (4); The central slip ring (10) and the edge slip ring (11) are respectively connected to the first brush (12), and the two first brushes (12) are respectively connected to the first rectifier (5) through wires.
6. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: A coil support (13) is provided on a main shaft (1) located between a plurality of excitation coils (6), and a plurality of second coils (7) are arranged on the coil support (13) and are evenly distributed around the main shaft (1).
7. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: A magnetic separator (14) is provided between the first coil (4) and the excitation coil (6).
8. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: In step S6, the specific steps for transmitting the second alternating current to the second rectifier mechanism (8) are as follows: A second slip ring mechanism is provided on the second coil (7), and the second AC current output by the second coil (7) is transmitted to the second rectifier mechanism (8) through the second slip ring mechanism.
9. The energy harvesting method for a hydroelectric generator set according to claim 8, characterized in that: The second slip ring mechanism includes a first slip ring (15) and a second slip ring (16); The first slip ring (15) and the second slip ring (16) are respectively connected to the two ends of the second coil (7); The first slip ring (15) and the second slip ring (16) are respectively connected to the second brush (17), and the two second brushes (17) are respectively connected to the second rectifier (8) through wires.
10. The energy harvesting method for a hydroelectric generator set according to claim 1, characterized in that: The bevel gear (3) includes two driving gears (31) arranged coaxially on the main shaft (1) and a plurality of driven gears (32) arranged between the two driving gears (31). The teeth of the two driving gears (31) are opposite, and the driven gears (32) mesh with the two driving gears (31) respectively. When the main shaft (1) rotates, the two driving wheels (31) rotate with the main shaft (1), and the two driving wheels (31) rotate in opposite directions, while the driven wheel (32) rotates around its own axis. The first coil (4) is connected to the driven wheel (32).