Eddy current braking device and method, storage medium and electronic device

Abstract

The invention discloses an eddy current braking device and method, a storage medium and an electronic device.According to the method, a control system and an eddy current brake in communication connection with the control system are included; the control system is used for monitoring the first rotating speed of the vertical axis fan in real time and starting the eddy current brake under the condition that the first rotating speed is higher than a first threshold value; and the eddy current brake is deployed on a rotor of the vertical axis fan and is used for reducing the first rotating speed of the vertical axis fan under the condition that the eddy current brake is started by the control system. The problems that the vertical shaft fan is weak in pneumatic unloading capacity at a high wind speed, the rotating speed is easy to be too high, and the fan is damaged at an overspeed are solved, and the eddy current braking difficulty is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to an eddy current braking device and method, a storage medium and an electronic device. Background Art

[0002] As an important equipment in the field of wind power generation, the Vertical Axis Wind Turbine (VAWT) shows unique advantages in wind energy conversion and utilization. Compared with traditional horizontal axis wind turbines, VAWTs can cope with changing wind directions more effectively without adjusting the blade angle to track the wind direction, which greatly simplifies the structure of the wind turbine and improves its applicability in urban and complex terrain environments. However, although VAWTs perform well in some aspects, their aerodynamic unloading capacity under high wind speed conditions is relatively weak, which becomes a key challenge to their operating efficiency and safety.

[0003] Aerodynamic unloading means that under high wind speed conditions, the fan adjusts the shape and angle of the blades to reduce the impact of wind on it, thereby avoiding excessive speed and excessive torque. For vertical axis fans, their blades are fixed and usually straight-plate design, which means that when the wind speed increases sharply, the fan blades cannot reduce the wind impact by adjusting the blade angle (pitch control) like horizontal axis fans, and thus cannot effectively unload wind energy. Therefore, vertical axis fans are prone to excessive speed at high wind speeds, leading to overspeed, which not only reduces the efficiency of the fan, but also causes serious damage to its structure and electrical system, and even leads to equipment destruction.

[0004] In the related technology, vertical axis fans have weak pneumatic unloading capacity at high wind speeds, are prone to excessive speeds, and are thus destroyed by overspeeding. No effective solution has yet been found. Summary of the invention

[0005] The embodiments of the present application provide an eddy current braking device and method, a storage medium and an electronic device to at least solve the problem in the prior art that the vertical axis fan has weak aerodynamic unloading capacity at high wind speeds, is prone to excessive speed, and is thus destroyed by overspeed.

[0006] According to one embodiment of the embodiments of the present application, an eddy current brake device is provided, comprising: a control system and an eddy current brake communicatively connected to the control system; the control system is used to monitor a first rotational speed of a vertical axis fan in real time, and to activate the eddy current brake when the first rotational speed is higher than a first threshold value; the eddy current brake is deployed on the rotor of the vertical axis fan, and is used to reduce the first rotational speed of the vertical axis fan when activated by the control system.

[0007] In an exemplary embodiment, the eddy current brake includes: at least one group of aluminum or copper disc-shaped magnetic conductive plates; the at least one group of aluminum or copper disc-shaped magnetic conductive plates is used to generate eddy currents by electromagnetic induction when the eddy current brake is activated by the control system, and to hinder the movement of the rotor by the eddy currents to reduce the first speed of the vertical axis fan.

[0008] In an exemplary embodiment, the eddy current brake is further used to automatically stop when a second rotational speed is lower than a second threshold, wherein the second rotational speed is the first rotational speed reduced by the eddy current brake, and the second threshold is lower than the first threshold.

[0009] In an exemplary embodiment, the control system is also used to control the eddy current brake to stop when the second speed is lower than a third threshold, wherein the second speed is the first speed after being reduced by the eddy current brake, the third threshold is lower than the first threshold, and the third threshold is greater than the second threshold.

[0010] In an exemplary embodiment, the control system is further used to control the magnitude of the current flowing into the eddy current brake according to the rotation speed of the vertical axis fan, so as to control the strength of the eddy current brake.

[0011] In an exemplary embodiment, the control system further includes an alarm unit; the alarm unit is used to execute an alarm event when a target condition is met; wherein the target condition includes one of the following: when the activation duration of the eddy current brake is longer than a first preset duration, the first speed of the vertical axis fan is still higher than the first threshold value; the time consumed by the eddy current brake to reduce the first speed to the second speed is less than a second preset duration.

[0012] According to another embodiment of the embodiment of the present application, there is also provided an eddy current braking method, comprising: monitoring a first rotational speed of a vertical axis fan in real time through a control system, and starting an eddy current brake when the first rotational speed is higher than a first threshold, wherein the eddy current brake is communicatively connected to the control system; and reducing the first rotational speed of the vertical axis fan through the started eddy current brake, wherein the eddy current brake is deployed on the rotor of the vertical axis fan.

[0013] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above method when running.

[0014] According to another aspect of the embodiments of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the method through the computer program.

[0015] According to another aspect of the embodiments of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0016] In an embodiment of the present application, a control system and an eddy current brake that is communicatively connected to the control system; the control system is used to monitor the first speed of the vertical axis fan in real time, and activate the eddy current brake when the first speed is higher than a first threshold; the eddy current brake is deployed on the rotor of the vertical axis fan, and is used to reduce the first speed of the vertical axis fan when activated by the control system. Through the above embodiments, the problem in the prior art that the vertical axis fan has weak pneumatic unloading capacity at high wind speeds, is prone to excessive speeds, and is then destroyed by overspeeding is solved, and the technical effect of stably controlling the speed of the vertical axis fan is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 It is a hardware structure block diagram of a computer terminal of an eddy current braking method according to an embodiment of the present application;

[0019] Figure 2 is a flow chart of an eddy current braking method according to an embodiment of the present application;

[0020] Figure 3 is a structural block diagram of an eddy current braking device according to an embodiment of the present application;

[0021] Figure 4 It is a schematic diagram of the installation position and structure of the eddy current braking device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices; "plurality" means two or more.

[0024] The method embodiments provided in the embodiments of the present application can be executed in a computer terminal or similar computing device or cloud platform or independent physical server or software platform, wherein the above software platform is run through one or more servers. Taking running on a computer terminal as an example, Figure 1 1 is a hardware structure block diagram of a computer terminal of an eddy current braking method according to an embodiment of the present application. Figure 1 As shown, the computer terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data. In an exemplary embodiment, the computer terminal may also include a transmission device 106 for communication functions and an input and output device 108, wherein the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. A person skilled in the art can understand that Figure 1 The structure shown is only for illustration and does not limit the structure of the above-mentioned computer terminal. Figure 1 More or fewer components as shown, or with Figure 1 Equivalent functions or comparisons shown Figure 1 A different configuration with more features is shown.

[0025] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as computer programs corresponding to the methods in the embodiments of the present application. The processor 102 executes various functional applications and data processing by running the computer programs stored in the memory 104, that is, the above-mentioned methods are implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the computer terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0026] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of a computer terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0027] In this embodiment, an eddy current braking method is provided, which is applied to the above-mentioned computer terminal. Figure 2 : is a flow chart of an eddy current braking method according to an embodiment of the present application, the process includes the following steps:

[0028] Step S202, monitoring a first rotational speed of the vertical axis fan in real time through a control system, and starting an eddy current brake when the first rotational speed is higher than a first threshold, wherein the eddy current brake is communicatively connected to the control system;

[0029] Step S204: reducing the first rotational speed of the vertical axis fan by using an activated eddy current brake, wherein the eddy current brake is deployed on a rotor of the vertical axis fan.

[0030] Through the above device, a control system and an eddy current brake that is in communication with the control system are controlled; the control system is used to monitor the first speed of the vertical axis fan in real time, and activate the eddy current brake when the first speed is higher than a first threshold; the eddy current brake is deployed on the rotor of the vertical axis fan, and is used to reduce the first speed of the vertical axis fan when activated by the control system. Through the above embodiment, the problem in the prior art that the vertical axis fan has weak pneumatic unloading capacity at high wind speeds, is prone to excessive speeds, and is then destroyed by overspeed is solved, and the technical effect of stably controlling the speed of the vertical axis fan is achieved.

[0031] Optionally, in the above step S204, the eddy current brake reduces the rotation speed of the vertical axis fan by relying on the disc-shaped magnetic conductive sheet in the eddy current brake. Specifically: the eddy current brake includes: at least one group of aluminum or copper disc-shaped magnetic conductive sheets; the at least one group of aluminum or copper disc-shaped magnetic conductive sheets is used to generate eddy currents through electromagnetic induction when the eddy current brake is activated by the control system, and hinder the movement of the rotor through the eddy current to reduce the first rotation speed of the vertical axis fan.

[0032] In an optional embodiment, the eddy current brake is also used to automatically stop when the second speed is lower than a second threshold, wherein the second speed is the first speed reduced by the eddy current brake, and the second threshold is lower than the first threshold.

[0033] In another optional embodiment, the control system is also used to control the eddy current brake to stop when the second speed is lower than a third threshold, wherein the second speed is the first speed after being reduced by the eddy current brake, the third threshold is lower than the first threshold, and the third threshold is greater than the second threshold.

[0034] It is understandable that after the eddy current brake is started, the eddy current brake will reduce the speed of the vertical axis fan through eddy currents. For the control system, when it is detected that the second speed of the vertical axis fan is lower than the third threshold, the eddy current brake can be controlled to stop. The third threshold can be equal to the first threshold. That is, if the control system detects that the first speed of the vertical axis fan has been reduced by the eddy current brake to: the second speed in a non-high-speed state, the control system can control the eddy current brake to stop. Optionally, for the eddy current brake, if the stop command sent by the control system has not been received, the eddy current brake may continue to generate eddy currents and may continue to reduce the speed of the vertical axis fan. At this time, if the first speed has been adjusted by the eddy current brake to: it cannot be further reduced, otherwise it may affect the second speed of the power generation state of the vertical axis fan (that is, lower than the second threshold), then the eddy current brake can stop automatically.

[0035] In an exemplary embodiment, the control system is further used to control the current flowing into the eddy current brake according to the rotation speed of the vertical axis fan to control the strength of the eddy current brake. The eddy current braking torque design is related to the unit torque.

[0036] Optionally, the control system also includes an alarm unit; the alarm unit is used to execute an alarm event when the target conditions are met; wherein the target conditions include one of the following: when the start-up duration of the eddy current brake is longer than a first preset duration, the first speed of the vertical axis fan is still higher than the first threshold value; the time consumed by the eddy current brake to reduce the first speed to the second speed is less than a second preset duration.

[0037] The above eddy current braking method can be applied to an eddy current braking device. The present application also provides a structural block diagram of an eddy current braking device. Figure 3 is a structural block diagram of an eddy current braking device according to an embodiment of the present application; Figure 3 As shown, including:

[0038] A control system 32, an eddy current brake 34 in communication with the control system;

[0039] The control system 32 is used to monitor the first rotation speed of the vertical axis fan in real time, and start the eddy current brake 34 when the first rotation speed is higher than a first threshold;

[0040] The eddy current brake 34 is disposed on the rotor of the vertical axis fan, and is used to reduce the first rotational speed of the vertical axis fan when activated by the control system 32 .

[0041] Through the above device, a control system and an eddy current brake that is in communication with the control system are controlled; the control system is used to monitor the first speed of the vertical axis fan in real time, and activate the eddy current brake when the first speed is higher than a first threshold; the eddy current brake is deployed on the rotor of the vertical axis fan, and is used to reduce the first speed of the vertical axis fan when activated by the control system. Through the above embodiment, the problem in the prior art that the vertical axis fan has weak pneumatic unloading capacity at high wind speeds, is prone to excessive speeds, and is then destroyed by overspeed is solved, and the technical effect of stably controlling the speed of the vertical axis fan is achieved.

[0042] In an exemplary embodiment, the eddy current brake includes: at least one group of aluminum or copper disc-shaped magnetic conductive plates; the at least one group of aluminum or copper disc-shaped magnetic conductive plates is used to generate eddy currents by electromagnetic induction when the eddy current brake is activated by the control system, and to hinder the movement of the rotor by the eddy currents to reduce the first speed of the vertical axis fan.

[0043] It is understood that the disc-shaped magnetic conductive sheet is the core component of the eddy current brake, and is usually made of highly conductive materials such as aluminum or copper. These magnetic conductive sheets are disc-shaped and have a large surface area, which can effectively interact with the magnetic field generated by the electromagnet to generate eddy currents. The disc-shaped magnetic conductive sheet is installed on the rotor of the fan and rotates with the rotor. Specifically, when the eddy current brake is activated, the electromagnet is energized to generate a magnetic field. When the disc-shaped magnetic conductive sheet on the rotor rotates in the magnetic field, eddy currents are generated according to the principle of electromagnetic induction. These eddy currents form a closed current loop in the magnetic conductive sheet. According to Lenz's law, these eddy currents will generate a magnetic field in the opposite direction of the rotor's rotation, which will cause the magnetic conductive sheet to be braked and reduce the speed of the fan.

[0044] The magnitude of the braking torque can be controlled by adjusting the current intensity of the electromagnet. When the wind speed is low, the current can be reduced to reduce the braking torque to avoid affecting the normal power generation efficiency of the wind turbine. When the wind speed is high and the speed is close to the safety threshold, the control system will increase the current and enhance the magnetic field generated by the electromagnet, thereby increasing the braking torque and controlling the speed more effectively.

[0045] Regarding the above-mentioned disk-shaped magnetic conductive sheet and electromagnet:

[0046] like Figure 4 As shown, the eddy current brake is deployed on the rotor of the vertical axis fan, and the eddy current brake includes: two disc-shaped magnetic conductive sheets (i.e. Figure 4 in the disk). Figure 4 The invention also includes two brake discs, which are located above and below the two disc-shaped magnetic conductive sheets. The main purpose of designing two brake discs is to enhance the braking effect by generating magnetic fields on both sides of the magnetic conductive sheet at the same time, thereby generating a stronger eddy current effect inside the magnetic conductive sheet and improving the braking torque. Specifically:

[0047] The function of the brake disc above the two disc-shaped magnetic plates: The upper brake disc contains one or more electromagnets. When the control system detects that the fan (i.e., vertical axis fan) is rotating too fast, these electromagnets will be energized to generate a downward magnetic field. This magnetic field interacts with the magnetic plate above to generate eddy currents, which in turn generate a braking torque in the opposite direction of the fan's rotation. The electromagnets of the upper brake disc can control the strength of the braking torque by adjusting the current to meet different braking requirements.

[0048] The function of the brake disc below the two disc-shaped magnetic plates: The lower brake disc also contains one or more electromagnets, which function similarly to the upper brake disc, but generate an upward magnetic field. This magnetic field interacts with the magnetic plate below, also generating eddy currents and braking torque. The cooperation of the upper and lower brake discs ensures that the magnetic plate generates eddy currents evenly throughout its thickness, improving braking efficiency while reducing local thermal effects on the magnetic plate, as eddy current braking generates heat.

[0049] By configuring brake discs (electromagnets) above and below the magnetic plate at the same time, the eddy current brake can achieve a more effective and balanced braking effect. This design ensures that the fan speed can be quickly and stably reduced even under extreme conditions, protecting the fan from damage. At the same time, since the brake disc and the magnetic plate are non-contact, this braking method does not cause mechanical wear, has a long service life and low maintenance costs. In actual applications, the electromagnets of the upper and lower brake discs may need to be connected to the control system through independent circuits so that they can be adjusted separately or simultaneously as needed. The flexibility of this design enables the eddy current brake to control the speed of vertical axis fans more accurately while maintaining high safety and reliability.

[0050] Furthermore, after the eddy current brake is started, the eddy current brake can be stopped or the eddy current brake can be stopped automatically by the control system according to the degree to which the speed of the vertical axis fan is adjusted:

[0051] Specifically, the eddy current brake is also used to automatically stop when the second rotational speed is lower than a second threshold, wherein the second rotational speed is the first rotational speed reduced by the eddy current brake, and the second threshold is lower than the first threshold.

[0052] Specifically, the control system is also used to control the eddy current brake to stop when the second speed is lower than a third threshold, wherein the second speed is the first speed after being reduced by the eddy current brake, the third threshold is lower than the first threshold, and the third threshold is higher than the second threshold.

[0053] It should be noted that the first speed refers to the original speed of the fan when no braking is performed. The second speed is the level to which the fan speed drops after the eddy current brake works, and is the result of the first speed after the eddy current brake works. The second speed should be controlled within a safe range below the first threshold, but above a lower second threshold to ensure that the fan can still generate electricity effectively without damaging itself.

[0054] It should also be noted that the first threshold is the upper limit speed for safe operation of the fan. Once the fan speed reaches or exceeds this threshold, the control system will immediately activate the eddy current brake to prevent the fan from overspeeding. This threshold is set based on factors such as the material strength, design speed and wind speed conditions of the fan.

[0055] The second threshold is a speed value lower than the first threshold. When the second speed drops below this threshold, the eddy current brake can automatically stop working. The setting of this threshold ensures that when the wind turbine speed is reduced to a safe and effective power generation range through braking, the brake will not continue to generate unnecessary resistance and affect the power generation efficiency. At the same time, the second threshold needs to be higher than the minimum effective speed of the wind turbine to ensure that the wind turbine can continue to operate and generate electricity after stopping braking.

[0056] The third threshold is another speed value between the second threshold and the first threshold. The control system will manually or automatically control the eddy current brake to stop when the second speed drops below the third threshold.

[0057] That is to say, by setting different thresholds, the control system can automatically adjust the working state of the eddy current brake to ensure that the wind turbine can operate safely and efficiently under various wind speed conditions. When the wind turbine speed exceeds the first threshold, the eddy current brake starts to work and reduces the speed to a safe range between the second threshold and the third threshold. Once the speed reaches or falls below the third threshold, the control system will automatically stop the brake to avoid excessive braking affecting the normal operation and power generation efficiency of the wind turbine. If the second speed is further reduced to below the second threshold, the brake will automatically stop to ensure that the wind turbine can still operate and generate electricity at low wind speeds.

[0058] The design of this multi-level threshold control system ensures the safe operation of the wind turbine and avoids the risk of overspeed caused by a sudden increase in wind speed. On the other hand, it also optimizes the operating efficiency of the wind turbine and avoids unnecessary energy loss and excessive wear of the brake. By comprehensively considering various operating conditions and safety factors, the designed eddy current brake and control system can enable the vertical axis wind turbine to operate safely and efficiently in a complex and variable wind speed environment.

[0059] In an exemplary embodiment, the control system is further used to control the magnitude of the current flowing into the eddy current brake according to the rotation speed of the vertical axis fan, so as to control the strength of the eddy current brake.

[0060] There is a direct relationship between the torque of eddy current braking and the unit torque of a vertical axis wind turbine. In a vertical axis wind turbine, the unit torque refers to the moment of wind force acting on the wind turbine blades, transmitted through the blades to the rotor, and then acting on the generator to rotate it and generate electricity. Under high wind speed conditions, the unit torque will increase significantly, causing the wind turbine to rotate too fast, which may exceed safety and design limits and cause damage to the wind turbine and generator. The torque of eddy current braking, as a braking torque, is used to offset part of the unit torque to control the speed of the wind turbine. Specifically:

[0061] A dynamic balance needs to be achieved between the torque of the eddy current brake and the torque of the unit. When the torque of the unit increases, causing the fan speed to be too fast, the eddy current brake device will offset part of the unit torque by increasing its braking torque, thereby reducing the speed until a balance state within a safe range is reached. The control system of the eddy current brake device usually automatically adjusts the torque of the eddy current brake according to changes in wind speed and unit torque. For example, when the wind speed increases, the control system will monitor the increase in the unit torque, and then increase the current of the eddy current brake accordingly, thereby enhancing the torque of the eddy current brake and ensuring that the speed does not exceed the set limit.

[0062] There is often a certain proportional relationship between the torque of the eddy current brake and the torque of the unit. During the design, the parameters of the eddy current brake device (such as the number and strength of the electromagnets, the material and size of the magnetic sheet, etc.) will be adjusted to ensure that the eddy current brake can provide sufficient braking torque at different unit torque levels, but will not completely stop the fan from rotating and affect its power generation efficiency.

[0063] By precisely controlling the torque of the eddy current brake, the vertical axis wind turbine can maintain a stable speed under high wind speed conditions, avoiding overspeed damage while maintaining sufficient power generation efficiency. The design and control strategy of the eddy current brake device needs to fully consider the range of the unit torque to ensure effective speed control under various wind speed conditions.

[0064] In an exemplary embodiment, the control system further includes an alarm unit; the alarm unit is used to execute an alarm event when a target condition is met; wherein the target condition includes one of the following: when the activation duration of the eddy current brake is longer than a first preset duration, the first speed of the vertical axis fan is still higher than the first threshold value; the time consumed by the eddy current brake to reduce the first speed to the second speed is less than a second preset duration.

[0065] When using an eddy current brake to brake a vertical axis wind turbine, situations that require an alarm usually involve the safety of the wind turbine operation and the effectiveness of the braking system. For example, if the startup time of the eddy current brake is longer than the first preset time, that is, the eddy current brake is used for a long time but cannot effectively reduce the speed of the vertical axis wind turbine, an alarm is required. The time consumed by the eddy current brake to reduce the first speed to the second speed is less than the second preset time, that is, the speed of the vertical axis wind turbine is reduced too quickly, and an alarm is also required.

[0066] In addition, the following are some situations that may also trigger an alert:

[0067] 1) When the speed of the wind turbine exceeds the safe speed threshold, an alarm should be triggered even if the eddy current brake is activated. This may indicate that the braking torque of the brake is insufficient to control the speed of the wind turbine, or that the wind speed is abnormally high, exceeding the limit of the system design.

[0068] 2) If the control system detects that the electromagnet of the eddy current brake is not responding, or the braking torque is significantly lower than expected, this may mean a brake failure, requiring an immediate alarm and emergency measures such as activating the backup braking system or a safe shutdown.

[0069] 3) Eddy current braking generates heat, and excessively high temperatures may affect the performance of the brake or even damage the brake components. If the temperature of the brake components (such as the electromagnet and the magnetic plate) is detected to exceed the safety limit, an overheat alarm should be triggered.

[0070] 4) If the wind speed sensor detects a sudden change in wind speed or exceeds the normal range, this may cause additional loads on the wind turbine and brake, requiring an alarm and appropriate adjustment of the eddy current brake parameters to cope with potential high torque conditions.

[0071] 5) If the control system of the wind turbine fails and the eddy current brake cannot be started or adjusted correctly, this will affect the safe operation of the wind turbine. The control system should have a self-check function and immediately alarm when a fault is detected.

[0072] 6) If the fan vibrates abnormally during braking, this may indicate that mechanical parts are loose or damaged, and an alarm is required for timely inspection and maintenance.

[0073] 7) In severe weather conditions such as thunderstorms and heavy fog, the operation of wind turbines may be affected and the performance of eddy current brakes may be limited. A weather monitoring system should be in place to issue an alarm and take protective measures when weather conditions that are not suitable for operation are detected.

[0074] In actual operation, wind turbines should be equipped with multiple levels of protection measures, including hardware protection (such as overheat protection, overload protection) and software control (such as speed control, wind speed monitoring). When any layer of protection measures is triggered, there should be a corresponding alarm mechanism, and appropriate measures can be taken automatically or through the intervention of operators to ensure the safe operation of the wind turbine. The alarm system is an important part of the safe operation of wind turbines, which helps operators to promptly discover and solve potential problems and avoid equipment damage and safety accidents.

[0075] In order to better understand the process of the above-mentioned eddy current braking method, the above-mentioned eddy current braking method is described below in combination with an optional embodiment, but it is not used to limit the technical solution of the embodiment of the present application.

[0076] In the related art, in order to solve the overspeed problem of vertical axis fans, mechanical brake systems are usually used in traditional vertical axis fan designs. However, mechanical brakes have a series of limitations and reliability issues. First, mechanical brakes usually reduce the fan speed by generating friction through direct contact. This contact braking method will generate huge impact loads at high speeds, causing damage to the brake mechanism, accelerating its wear and reducing its service life. Secondly, due to the frequent contact and wear of the mechanical brake, its braking effect will gradually decrease over time, resulting in unstable safety performance. In addition, in emergency braking situations, the mechanical brake may fail due to the high temperature generated by friction, increasing safety risks.

[0077] In view of the limitations of the pneumatic unloading capacity of vertical axis fans under high wind speed conditions and the shortcomings of traditional mechanical brake systems, the optional embodiment of the present application provides a non-contact, reliable and efficient braking solution. The braking solution provided by the optional embodiment of the present application can not only respond quickly under high wind speeds and effectively reduce the fan speed, but also avoid large impact loads and mechanical wear to ensure the long-term operation safety and reliability of the fan.

[0078] Specifically, the braking solution provided in the optional embodiment of the present application is: an eddy current braking device is proposed to adjust the speed of the wind turbine generator and prevent overspeed operation. The eddy current braking device is usually composed of an eddy current brake and a control system.

[0079] Among them, the eddy current brake is composed of a group of aluminum or copper disc-shaped magnetic conductive sheets, which are installed on the rotor of the fan. Figure 4 When the fan speed is too fast, the eddy current brake will generate eddy currents through induction, causing the rotor to experience a certain amount of resistance, thereby reducing the fan speed.

[0080] The control system is used to monitor the fan speed and wind speed, and control the start and stop and strength of the eddy current brake according to the set parameters. When the speed exceeds the set value, the control system will start the eddy current brake and adjust the fan speed; when the speed returns to normal, the eddy current brake will stop automatically.

[0081] Through the eddy current brake device, vertical wind turbines can run more stably and protect the wind turbines from damage, while also improving the efficiency and safety of wind turbines.

[0082] The eddy current brake device is braked by electromagnetic means, the brake is non-contact, the brake impact load is small, there is no wear, and the reliability is high.

[0083] In summary, in the optional embodiments of the present application, a magnetic sheet is installed on the fan rotor, and an electromagnet is arranged around the magnetic sheet, and the eddy current generated by electromagnetic induction is used to generate a braking torque, thereby achieving non-contact control of the fan speed. The eddy current brake device can respond quickly at high wind speeds, and by adjusting the current of the electromagnet, the braking torque can be accurately controlled to effectively avoid overspeeding of the fan. At the same time, since the braking process does not involve direct mechanical contact, it can significantly reduce impact loads and mechanical wear, improve the reliability of the brake mechanism, and extend the service life of the fan. In addition, the response speed of the eddy current brake device and the adjustability of the braking torque make it an ideal solution for vertical axis fans to maintain safe and efficient operation under high wind speed conditions.

[0084] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0085] An embodiment of the present application further provides a storage medium, which includes a stored program, wherein the program executes any of the above methods when it is run.

[0086] Optionally, in this embodiment, the storage medium may be configured to store program codes for executing the following steps:

[0087] S1, monitoring a first rotational speed of the vertical axis fan in real time through a control system, and starting an eddy current brake when the first rotational speed is higher than a first threshold, wherein the eddy current brake is communicatively connected with the control system;

[0088] S2, reducing the first rotational speed of the vertical axis fan by using an activated eddy current brake, wherein the eddy current brake is deployed on a rotor of the vertical axis fan.

[0089] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0090] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0091] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0092] S1, monitoring a first rotational speed of the vertical axis fan in real time through a control system, and starting an eddy current brake when the first rotational speed is higher than a first threshold, wherein the eddy current brake is communicatively connected with the control system;

[0093] S2, reducing the first rotational speed of the vertical axis fan by using an activated eddy current brake, wherein the eddy current brake is deployed on a rotor of the vertical axis fan.

[0094] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store program codes.

[0095] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0096] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0097] An embodiment of the present application also provides a computer program, which includes computer instructions stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0098] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0099] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0100] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. An eddy current braking device, characterized in that: include: A control system, and an eddy current brake in communication with the control system; The control system is used to monitor a first rotational speed of the vertical axis fan in real time, and to activate the eddy current brake when the first rotational speed is higher than a first threshold value; The eddy current brake is disposed on the rotor of the vertical axis fan, and is used to reduce the first rotational speed of the vertical axis fan when activated by the control system.

2. The eddy current braking device according to claim 1, characterized in that: The eddy current brake comprises: at least one set of disc-shaped magnetic conductive sheets made of aluminum or copper; The at least one group of aluminum or copper disc-shaped magnetic conductive sheets is used to generate eddy currents by electromagnetic induction when the eddy current brake is activated by the control system, and to hinder the movement of the rotor by the eddy currents to reduce the first rotational speed of the vertical axis fan.

3. The eddy current braking device according to claim 1, characterized in that: The eddy current brake is further used for automatically stopping when a second rotational speed is lower than a second threshold, wherein the second rotational speed is the first rotational speed reduced by the eddy current brake, and the second threshold is lower than the first threshold.

4. The eddy current braking device according to claim 1, characterized in that: The control system is also used to control the eddy current brake to stop when the second speed is lower than a third threshold, wherein the second speed is the first speed reduced by the eddy current brake, the third threshold is lower than the first threshold, and the third threshold is higher than the second threshold.

5. The eddy current braking device according to claim 1, characterized in that: The control system is also used to control the magnitude of the current flowing into the eddy current brake according to the rotation speed of the vertical axis fan, so as to control the strength of the eddy current brake.

6. The eddy current braking device according to claim 1, characterized in that: The control system further includes an alarm unit; The alarm unit is used to execute an alarm event when a target condition is met; The target condition includes one of the following: When the activation time of the eddy current brake is longer than the first preset time, the first rotation speed of the vertical axis fan is still higher than the first threshold value; The time length consumed for the first speed to be reduced to the second speed by the eddy current brake is less than a second preset time length.

7. An eddy current braking method, characterized in that: The eddy current braking device according to any one of claims 1 to 6 comprises: monitoring a first rotational speed of the vertical axis fan in real time through a control system, and activating an eddy current brake when the first rotational speed is higher than a first threshold, wherein the eddy current brake is in communication with the control system; The first rotational speed of the vertical axis fan is reduced by an activated eddy current brake, wherein the eddy current brake is deployed on a rotor of the vertical axis fan.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method described in claim 7 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method of claim 7 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method described in claim 7 are implemented.

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