Controllable blade resistance differential energy scheduling type vertical axis wind turbine

Abstract

The application provides a controllable blade resistance difference energy scheduling type vertical shaft wind driven generator, and relates to the technical field of wind driven power generation.The controllable blade resistance difference energy scheduling type vertical shaft wind driven generator comprises a support and a controllable blade resistance difference energy scheduling component.The controllable blade resistance difference energy scheduling component comprises a connecting seat arranged at the top of the support.In the application, when the fan blade revolves around the vertical main shaft to the windward area, the controller controls the brushless motor to work in the power generation state, and the aerodynamic resistance of the fan blade is increased to capture more wind energy.When the fan blade revolves to the leeward area, the controller calls the temporarily stored electric energy in the super capacitor, drives the brushless motor to work in the electric drive state, drives the fan blade to rotate at a high speed, reduces the aerodynamic resistance of the fan blade, and the energy generated by the windward fan blade is used to preferentially meet the driving of the leeward fan blade and the self-power supply of the controller, so that the energy closed loop scheduling is realized, a net torque is generated through the damping difference of the two fan blades, the vertical main shaft is driven to rotate, and the main generator is driven to convert mechanical energy into electric energy.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a controllable blade drag difference energy dispatching vertical axis wind turbine. Background Technology

[0002] A vertical axis wind turbine is a wind energy conversion device whose rotating axis is perpendicular to the ground. Compared with traditional horizontal axis wind turbines, it has better adaptability, can operate efficiently under different wind directions, can be deployed in complex terrains, and is relatively simple to maintain.

[0003] However, existing technologies still have the following significant shortcomings in practical use: Traditional Sabinius wind turbines have extremely low wind energy utilization rates. The core reason is that the blades generate a large negative torque in the upwind zone during the rotation cycle, which offsets the positive driving force in the upwind zone, resulting in a significant decrease in overall output power. To address the headwind resistance problem, existing technologies often employ variable geometry blades, which use mechanical opening and closing to catch wind in the wind and deflect it in the headwind. However, this approach requires a large number of miniature shafts, hinges, and linkages, which are prone to wear, jamming, fatigue fracture, and other failures during long-term operation. Furthermore, it requires high manufacturing precision and is difficult to control in terms of cost. There is an inherent contradiction between new energy power generation and the need for stable power supply facilities, such as 24-hour data centers that combine computing and electricity. Large-capacity energy storage equipment is required. This invention can freely control the difference in fan blade resistance, resulting in more stable power output compared to other new energy power generation equipment. Some high-end solutions employ active control pitch mechanisms, but these require complex slip ring power supply and signal transmission systems, significantly increasing the number of potential failure points and maintenance costs, making them unsuitable for large-scale applications of small and medium-sized wind turbines.

[0004] Therefore, this invention proposes a controllable blade drag difference energy dispatching vertical axis wind turbine to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a controllable blade drag difference energy dispatching vertical axis wind turbine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a controllable blade drag difference energy dispatching vertical axis wind turbine, including a support frame and a controllable blade drag difference energy dispatching component: The controllable blade drag difference energy dispatching component includes a connecting seat mounted on the top of the support frame. A triangular connecting beam is fixedly connected to the side wall of the connecting seat. A vertical support rod is fixedly connected to the outer end of the triangular connecting beam. A conical fan housing is fixedly connected to the end of the vertical support rod. A brushless motor is installed inside the fan housing. The output end of the brushless motor is coaxially connected to the fan blades. A fan motor controller and a supercapacitor are integrated and installed inside the connecting seat. The fan motor controller is electrically connected to the brushless motor and the supercapacitor, respectively. A vertical main shaft is coaxially fixed at the bottom of the connecting seat. The lower end of the vertical main shaft is connected to the main generator for transmission.

[0007] Furthermore, the triangular connecting beam forms an angle with the axis of the fan housing, creating a deflection torque that allows the wind to drive the revolution axis to rotate in any direction. The windward side of the triangular connecting beam has a pointed tip, which differs from the airflow resistance structure on the windward and reverse sides.

[0008] The beneficial effects of adopting the above-mentioned further solutions are: the included angle design and the pointed windward structure form an inherent deflection torque, which can achieve self-starting in any wind direction without the need for an additional wind-fighting mechanism. The triangular cross section has both high strength and low wind resistance characteristics, which minimizes uncontrollable aerodynamic drag loss while ensuring structural rigidity, and further improves the start-up reliability and operating efficiency of the fan.

[0009] Furthermore, the fan motor controller can control the fan blades on the output end of the brushless motor to rotate at high speed, increasing the resistance difference of the fan blades. When the machine stops, the fan motor controller controls the brushless motor to reduce the damping difference between the two fan blades.

[0010] The beneficial effects of adopting the above-mentioned further scheme are as follows: When one side of the fan blade moves to the windward surface with the vertical main shaft, the fan motor controller controls the brushless motor on that side to generate electricity to form damping. At this time, the DC side voltage is judged. If the voltage is higher than the threshold of the other side of the fan blade, the pulse drives the other side of the fan blade to rotate counterclockwise, and the airflow accelerates and increases the damping difference with the one side of the fan blade. If the DC side voltage is lower than the threshold of driving the other side of the fan blade, the one side of the fan blade is not driven, and it rotates naturally with the wind. Under this working condition, the system only needs standby energy, which can be completely supplied by the energy of damping.

[0011] Furthermore, the supercapacitor is used to temporarily store the electrical energy generated by the brushless motor, providing slip-ring-free self-powered power to the fan motor controller.

[0012] The beneficial effects of adopting the above-mentioned further scheme are: the supercapacitor temporarily stores the energy generated by the blades, providing a completely self-powered power supply for the rotating side controller, while buffering the power fluctuations of energy dispatch, maintaining the stability of the DC side voltage, and improving the continuity and reliability of system operation.

[0013] Furthermore, a main power generation component is provided on the side of the bracket near the bottom of the connecting seat. The main power generation component includes a housing fixedly installed in the middle of the bracket. A speed-increasing generator with a planetary gear structure is coaxially fixedly installed at the top of the housing. The lower end of the vertical main shaft passes through the top wall of the housing and is coaxially fixedly connected to the rotor shaft of the speed-increasing generator with a planetary gear structure. A three-phase inductor, a three-phase PWM rectifier bridge and a three-phase PWM inverter bridge are also fixedly installed in the housing. The stator output terminal of the speed-increasing generator with a planetary gear structure is electrically connected to the three-phase PWM inverter bridge in sequence through the three-phase inductor, the three-phase PWM rectifier bridge and the three-phase PWM inverter bridge.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: the speed-increasing generator with planetary gear structure, combined with the PWM converter topology, realizes speed regulation operation over a wide wind speed range, adapts to the power generation needs of different working conditions, the three-phase inductor can effectively suppress current harmonics, and the integrated housing design integrates the generator and converter into one unit, with a compact structure, which facilitates on-site installation and subsequent maintenance.

[0015] Furthermore, a main generator controller is fixedly installed at the bottom of the housing. The main generator controller is electrically connected to a speed-increasing generator with a planetary gear structure. The main generator speed is adjusted by maximum power point tracking to match the optimal wind energy capture efficiency. The fan motor controller and the main generator controller communicate wirelessly via WiFi.

[0016] The advantages of adopting the above-mentioned further solutions are: the maximum power point tracking algorithm can match the optimal speed in real time, maximize wind energy capture efficiency, and improve the overall power generation; WiFi wireless communication eliminates the slip ring signal transmission link, further reducing fault points; it supports IAP online upgrades, which can complete firmware updates and function optimizations without disassembling the machine, facilitating remote operation and maintenance and system iteration upgrades.

[0017] Furthermore, a protective shell is fixedly connected to the outer wall of the housing, the protective shell covers all the wiring ports of the housing, and a rubber sealing ring is provided at the connection between the protective shell and the housing.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: the full-coverage protective shell can effectively protect the wiring ports from external damage, the rubber sealing ring achieves IP65 protection, which can block rainwater, dust, salt spray and other substances from entering the shell, avoid short circuits and corrosion of electrical components, significantly improve the adaptability of the fan in harsh outdoor environments, and extend the service life and operational safety of the electrical system.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows: In this invention, airflow drives the fan blades to rotate, which in turn drives a coaxially connected brushless motor. The fan motor controller uses a built-in Hall sensor in the motor to detect the rotation direction and speed of the fan blades in real time. When the fan blades revolve with the vertical main shaft to the windward area, the controller controls the brushless motor to operate in the power generation state. By adjusting the magnitude of the power generation current, controllable electromagnetic damping is generated, increasing the aerodynamic resistance of the fan blades to capture more wind energy. When the fan blades revolve to the reverse wind area, the controller calls on the electrical energy temporarily stored in the supercapacitor to drive the brushless motor to operate in the electric mode, causing the fan blades to rotate faster and reducing the aerodynamic resistance of the fan blades. The energy generated by the fan blades on the windward side is prioritized to drive the reverse fan blades and power the controller itself, realizing closed-loop energy scheduling. Finally, the net torque is generated by the damping difference between the two fan blades, which drives the vertical main shaft to rotate and drives the main generator to convert mechanical energy into electrical energy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a controllable blade drag difference energy dispatching vertical axis wind turbine according to the present invention; Figure 2 This is a schematic diagram of the controllable blade drag difference energy dispatching component of a controllable blade drag difference energy dispatching vertical axis wind turbine according to the present invention. Figure 3 This is a schematic diagram of the triangular connecting beam structure of a controllable blade drag difference energy dispatching vertical axis wind turbine according to the present invention; Figure 4 This is a schematic diagram of the internal structure of the connecting seat of a vertical axis wind turbine with controllable blade drag difference energy dispatching according to the present invention. Figure 5 This is a schematic diagram of the main power generation component structure of a controllable blade drag difference energy dispatching vertical axis wind turbine according to the present invention. Figure 6 This is a schematic diagram of the internal structure of the housing of a vertical axis wind turbine generator with controllable blade drag difference energy dispatching according to the present invention. Figure 7 This is a schematic diagram showing the structural breakdown of the main power generation component of a vertical axis wind turbine generator with controllable blade drag difference energy dispatching according to the present invention.

[0021] Figure label: 1. Bracket; 2. Controllable blade drag difference energy dispatching component; 21. Connecting seat; 22. Triangular connecting beam; 23. Vertical support rod; 24. Fan housing; 25. Brushless motor; 26. Fan blade; 27. Fan motor controller; 28. Supercapacitor; 29. ​​Vertical spindle; 3. Main generator assembly; 31. Housing; 32. Speed-increasing generator with planetary gear structure; 33. Three-phase inductor; 34. Three-phase PWM rectifier bridge; 35. Three-phase PWM inverter bridge; 36. Main generator controller; 37. Protective housing. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] like Figures 1-4 As shown, this embodiment provides a technical solution: a controllable blade drag difference energy dispatching vertical axis wind turbine, including a support frame 1, and a controllable blade drag difference energy dispatching component 2. The controllable blade drag difference energy dispatching component 2 includes a connecting seat 21 located at the top of the support 1. A triangular connecting beam 22 is fixedly connected to the side wall of the connecting seat 21. A vertical support rod 23 is fixedly connected to the outer end of the triangular connecting beam 22. A conical fan housing 24 is fixedly connected to the end of the vertical support rod 23. A brushless motor 25 is installed inside the fan housing 24. The output end of the brushless motor 25 is coaxially connected to the fan blade 26. A fan motor controller 27 and a supercapacitor 28 are integrated inside the connecting seat 21. The fan motor controller 27 is electrically connected to the brushless motor 25 and the supercapacitor 28, respectively. A vertical main shaft 29 is coaxially fixed to the bottom of the connecting seat 21. The lower end of the vertical main shaft 29 is connected to the main generator for transmission. Airflow drives the fan blade 26 to rotate, which in turn drives the coaxially connected brushless motor 25 to run. The rotation direction and speed of the fan blade 26 are detected in real time by the built-in Hall sensor of the motor. When the fan blade 26 revolves with the vertical main shaft 29 to the windward area, the controller controls the brushless motor 25 to work in the power generation state. By adjusting the magnitude of the power generation current, controllable electromagnetic damping is generated to increase the aerodynamic resistance of the fan blade 26 to capture more wind energy. When the fan blade 26 revolves to the reverse wind area, the controller calls the electrical energy temporarily stored in the supercapacitor 28 to drive the brushless motor 25 to work in the electric state, which drives the fan blade 26 to rotate faster and reduces the aerodynamic resistance of the fan blade 26. The energy generated by the fan blade 26 in the windward area is given priority to drive the reverse fan blade 26 and the controller to power itself, realizing energy closed-loop scheduling. Finally, the net torque is generated by the damping difference of the two fan blades 26, which drives the vertical main shaft 29 to rotate and drives the main generator to convert mechanical energy into electrical energy.

[0024] like Figures 1-4As shown, the triangular connecting beam 22 forms an angle with the axis of the fan housing 24, creating a deflection torque that allows the wind to drive the revolution axis to rotate in any direction. The windward side of the triangular connecting beam 22 has a pointed tip, resulting in different airflow resistance structures on the windward and counter-wind sides. The angled design and the pointed windward structure create an inherent deflection torque, enabling self-starting in any wind direction without the need for an additional wind-fighting mechanism. The triangular cross-section combines high strength and low wind resistance, minimizing uncontrollable aerodynamic drag loss while ensuring structural rigidity, further improving the fan's start-up reliability and operating efficiency. The fan motor controller 27 can control the high-speed rotation of the fan blades 26 at the output end of the brushless motor 25. When stopping, the fan motor controller 27 controls the brushless motor 25 to reduce the damping difference between the two fan blades 26. When one fan blade 26 moves with the vertical main shaft 29 to the windward side, the fan motor controller... 27 controls the brushless motor 25 on this side to generate electricity to form damping. At this time, the DC side voltage is judged. If the voltage is higher than the threshold of the other side fan blade 26, the other side fan blade 26 is driven to rotate counterclockwise with a pulse. The airflow accelerates and increases the damping difference with the fan blade 26 on one side. If the DC side voltage is lower than the threshold of driving the other side fan blade 26, the fan blade 26 on one side is not driven and it rotates naturally with the wind. Under this condition, the system only needs standby energy, which can be completely supplied by the energy of damping. The supercapacitor 28 is used to temporarily store the electrical energy generated by the brushless motor 25 to provide slip ring-free self-powered power to the fan motor controller 27. The supercapacitor 28 temporarily stores the energy generated by the fan blade 26 to provide completely self-powered power to the rotation side controller. At the same time, it can buffer the power fluctuation of energy dispatch, maintain the stability of the DC side voltage, and improve the continuity and reliability of system operation. like Figures 5-7As shown, a main power generation assembly 3 is provided on the side of the bracket 1 near the bottom of the connecting seat 21. The main power generation assembly 3 includes a housing 31 fixedly installed in the middle of the bracket 1. A planetary gear-driven speed-increasing generator 32 is coaxially fixedly installed at the top of the housing 31. The lower end of the vertical main shaft 29 passes through the top wall of the housing 31 and is coaxially fixedly connected to the rotor shaft of the planetary gear-driven speed-increasing generator 32. A three-phase inductor 33, a three-phase PWM rectifier bridge 34, and a three-phase PWM inverter bridge 35 are also fixedly installed inside the housing 31. The stator of the planetary gear-driven speed-increasing generator 32... The sub-output terminal is electrically connected to the three-phase inductor 33, the three-phase PWM rectifier bridge 34, and the three-phase PWM inverter bridge 35 in sequence. The planetary gear-driven speed-increasing generator 32, in conjunction with the PWM converter topology, achieves speed regulation operation over a wide wind speed range, adapting to the power generation needs of different operating conditions. The three-phase inductor 33 effectively suppresses current harmonics. The integrated housing 31 design integrates the generator and converter into one compact structure, facilitating on-site installation and subsequent maintenance. The main generator controller 36 is fixedly installed at the bottom inside the housing 31. The fan motor controller 27 is electrically connected to the planetary gear speed-increasing generator 32. Maximum power point tracking (MPPT) is used to adjust the main generator speed, matching the optimal wind energy capture efficiency. The fan motor controller 27 and the main generator controller 36 communicate wirelessly via WiFi. The MPPT algorithm can match the optimal speed in real time, maximizing wind energy capture efficiency and increasing the overall power generation. WiFi wireless communication eliminates the slip ring signal transmission link, further reducing fault points. It supports IAP online upgrades, allowing firmware updates and function optimizations without disassembly, facilitating remote operation and maintenance and system iteration upgrades. A protective shell 37 is fixedly connected to the outer wall of the housing 31, covering all wiring ports of the housing 31. A rubber sealing ring is provided at the connection between the protective shell 37 and the housing 31. The full-coverage protective shell 37 effectively protects the wiring ports from external damage. The rubber sealing ring achieves IP65 protection, preventing rainwater, dust, salt spray, etc., from entering the housing 31, avoiding short circuits and corrosion of electrical components, significantly improving the wind turbine's adaptability to harsh outdoor environments, and extending the service life and operational safety of the electrical system.

[0025] Working principle: like Figures 1-7As shown, the inherent deflection torque is first formed by the angle between the triangular connecting beam 22 and the fan housing 24, and the pointed windward structure. This allows for self-starting in any wind direction without the need for an additional wind-fighting mechanism. In the initial stage, the airflow drives the fan blades 26 on both sides to rotate, which in turn drives the brushless motor 25 to generate electricity. After rectification, the electrical energy charges the supercapacitor 28, and the system is in a low-power standby state. When the supercapacitor voltage reaches the system startup threshold, the fan motor controller 27 uses the Hall sensor built into the brushless motor 25 to detect the rotation direction and speed of the fan blades 26 in real time and activates the core energy scheduling mechanism. When the fan blades 26 revolve with the vertical main axis 29 to the windward catchment area, the controller controls the brushless motor 25 to operate in the power generation state. By adjusting the magnitude of the power generation current, controllable electromagnetic damping is generated to maximize the aerodynamic resistance of the fan blades 26 to capture wind energy. When the fan blades 26 enter the headwind area, the controller detects the DC side voltage in real time. If it is higher than the drive threshold, it calls upon the electrical energy temporarily stored in the supercapacitor to drive the brushless motor 25 to accelerate the rotation of the fan blades 26, allowing the airflow to pass through quickly and efficiently. To minimize headwind resistance, the system will not drive if the voltage is insufficient, and will only maintain standby mode. All energy consumption is supplied by the damped generator. The energy generated by the front fan blade 26 is prioritized to drive the back fan blade 26 and power the controller, forming a closed-loop energy dispatch. The dynamic damping difference between the two fan blades 26 generates a continuous net torque, which drives the vertical main shaft 29 to rotate. The main shaft drives the speed-increasing generator 32 with a planetary gear structure. The stator output is filtered by a three-phase inductor 33, and the three-phase PWM rectifier bridge 34 and inverter bridge complete the AC-DC-AC conversion. The main generator controller 36 adjusts the generator speed in real time through the maximum power point tracking algorithm to match the optimal wind energy capture efficiency. The fan motor controller 27 communicates wirelessly with the main controller via WiFi, which can control the brushless motor 25 to generate torque pulsation or high-speed rotation to achieve self-cleaning of the fan blades 26. When the system stops, it actively reduces the damping difference between the two fan blades 26, which significantly reduces the load on the braking system. The protective shell 37 and the rubber sealing ring constitute IP65 protection, which effectively blocks rainwater and dust intrusion and ensures long-term reliable operation in harsh outdoor environments.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A controllable blade drag difference energy dispatching vertical axis wind turbine, comprising a support frame (1), characterized in that, It also includes a controllable blade drag difference energy dispatching component (2): The controllable blade resistance difference energy scheduling component (2) includes a connecting seat (21) set on the top of the support (1). A triangular connecting beam (22) is fixedly connected to the side wall of the connecting seat (21). A vertical support rod (23) is fixedly connected to the outer end of the triangular connecting beam (22). A conical fan housing (24) is fixedly connected to the end of the vertical support rod (23). A brushless motor (25) is installed inside the fan housing (24). The output end of the brushless motor (25) is coaxially connected to the fan blade (26). A fan motor controller (27) and a supercapacitor (28) are integrated inside the connecting seat (21). The fan motor controller (27) is electrically connected to the brushless motor (25) and the supercapacitor (28) respectively. A vertical main shaft (29) is coaxially fixed at the bottom of the connecting seat (21). The lower end of the vertical main shaft (29) is connected to the main generator for transmission.

2. The controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 1, characterized in that: The triangular connecting beam (22) forms an angle with the axis of the fan housing (24), which constitutes a deflection torque, allowing the wind to drive the revolution shaft to rotate in any direction. The windward side of the triangular connecting beam (22) has a pointed tip, which is different from the airflow resistance structure on the windward and reverse sides.

3. A controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 1, characterized in that: The fan motor controller (27) can control the fan blades (26) on the output end of the brushless motor (25) to rotate at high speed. When the machine stops, the fan motor controller (27) controls the brushless motor (25) to reduce the damping difference between the two fan blades (26).

4. A controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 1, characterized in that: The supercapacitor (28) is used to temporarily store the electrical energy generated by the brushless motor (25) and provide slip-ring-free self-powered power to the fan motor controller (27).

5. A controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 1, characterized in that: A main power generation assembly (3) is provided on one side of the bracket (1) near the bottom of the connecting seat (21). The main power generation assembly (3) includes a housing (31) fixedly installed in the middle of the bracket (1). A speed-increasing generator (32) with a planetary gear structure is fixedly installed on the top of the housing (31) on the same axis. The lower end of the vertical main shaft (29) passes through the top wall of the housing (31) and is fixedly connected to the rotor shaft of the speed-increasing generator (32) with a planetary gear structure on the same axis. A three-phase inductor (33), a three-phase PWM rectifier bridge (34) and a three-phase PWM inverter bridge (35) are also fixedly installed in the housing (31). The stator output terminal of the speed-increasing generator (32) with a planetary gear structure is electrically connected to the three-phase inductor (33), the three-phase PWM rectifier bridge (34) and the three-phase PWM inverter bridge (35) in sequence.

6. A controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 5, characterized in that: The main generator controller (36) is fixedly installed at the bottom of the housing (31). The main generator controller (36) is electrically connected to the speed-increasing generator (32) with planetary gear structure. The main generator speed is adjusted by maximum power point tracking to match the optimal wind energy capture efficiency. The fan motor controller (27) and the main generator controller (36) are wirelessly connected via WiFi.

7. A controllable blade drag difference energy dispatching vertical axis wind turbine generator according to claim 5, characterized in that: A protective shell (37) is fixedly connected to the outer wall of the housing (31). The protective shell (37) covers all the wiring ports of the housing (31). A rubber sealing ring is provided at the connection between the protective shell (37) and the housing (31).

Images