Noise optimization control method, device and equipment when rotor is captured and storage medium

Abstract

The application relates to a noise optimization control method, device and equipment for rotor capture and a storage medium, and relates to the fan technical field, and particularly relates to a noise optimization control method, device and equipment for rotor capture and a storage medium, which comprises the following steps: obtaining a starting instruction issued by a fan; outputting first voltage data through voltage detection and comparison by using the starting instruction issued by the fan; determining the motion state of the fan at present by using the first voltage data; and obtaining the related results of noise optimization control of single-resistance sampling during rotor capture by using the determination result of the motion state of the fan at present and executing the corresponding motion mode. Through voltage detection and comparison, the first voltage data is outputted, the motion state of the fan at present is determined by using the first voltage data, and the corresponding motion mode is executed, so that single-resistance sampling realizes noiseless starting during rotor capture.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, and in particular to a method, apparatus, equipment and storage medium for noise optimization control during rotor capture. Background Technology

[0002] Industrial fans typically do not have position sensors due to structural and cost limitations. However, accurate acquisition of motor winding current is crucial for the accuracy of rotor position observers. In fan applications, current is sampled in each PWM cycle. Single-resistor sampling places higher demands on motor winding current sampling, requiring reconstruction of the three-phase winding current based on the total bus current at different times. The advantages of single-resistor sampling are lower cost, simpler board layout, and reduced heat generation from the sampling resistor. Single-resistor sampling uses a phase-shifting method. For a stationary fan rotor, during rotor capture, the motor's Id and Iq currents are zero after CLARK and PARK transformations. Since the rotor is not rotating, the motor phase current is close to zero, and the PWM drive duty cycle is very narrow, resulting in a very small current sampling window. The phase-shifting method causes the space vector pulse width modulation (SVPWM) vector pointer to swing between two sectors. This swinging causes audible noise.

[0003] In existing technologies, when sampling with a single resistor in wind turbine applications without position sensors, the rotor capture when the wind turbine rotor is stationary will cause some noise, which will have a certain impact on human hearing. Summary of the Invention

[0004] To at least partially overcome the problem in related technologies that when sampling with a single resistor in a wind turbine application without position sensors, the rotor capture causes noise when the wind turbine rotor is stationary, which has a certain impact on human hearing, this application provides a method, apparatus, equipment, and storage medium for noise optimization control during rotor capture.

[0005] The proposed solution is as follows:

[0006] In a first aspect, this application provides a noise optimization control method during rotor capture, the method comprising:

[0007] Receive the start command from the wind turbine;

[0008] Using the start command issued by the fan, the first voltage data is output through voltage detection and comparison;

[0009] The current operating state of the fan is determined using the first voltage data;

[0010] Using the determination result of the current motion state of the fan, the corresponding motion mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0011] Furthermore, the step of using the start command issued by the fan to output first voltage data through voltage detection and comparison includes:

[0012] Using the start command issued by the fan, the output voltage of the motor in the pre-obtained sampling motor is divided by a preset first resistor;

[0013] The output voltage of the motor after voltage division is connected to the positive terminal of the corresponding comparator, and the negative terminal of the comparator is connected to one end of a preset second resistor.

[0014] If the comparator has a pulse output, the microcontroller is used to obtain the high or low level of the pulse.

[0015] The first voltage data is output by utilizing the high and low levels of the pulse.

[0016] Furthermore, determining the current operating state of the wind turbine using the first voltage data includes:

[0017] Compare the first voltage data with a preset first state threshold;

[0018] If the first voltage data is less than or equal to the first state threshold, then the current operating state of the fan is determined to be either low-speed operation mode or stationary operation mode.

[0019] If the first voltage data is greater than the first state threshold, then the current operating state of the fan is determined to be high-speed operation mode.

[0020] Furthermore, using the determination result of the current motion state of the wind turbine, the corresponding motion mode is executed to obtain the relevant results of noise optimization control during rotor capture under single resistance sampling, including:

[0021] If the current motion state of the fan is stationary or low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0022] If the current operating state of the fan is high-speed operation mode, then the second operating mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0023] Furthermore, if the current motion state of the fan is stationary or in a low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control during rotor capture under single-resistance sampling, including:

[0024] If the current motion state of the fan is stationary or in low-speed operation mode, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0025] Furthermore, if the current operating state of the wind turbine is high-speed operation mode, then the second operating mode is executed to obtain the relevant results of noise optimization control during rotor capture under single-resistance sampling, including:

[0026] If the current operating state of the fan is high-speed operation mode, then the rotor capture function is executed;

[0027] The wind direction and operating status of the fan are determined by using the execution result of the rotor capture function.

[0028] If the fan is operating with the wind, it will start up with the wind.

[0029] If the wind direction of the fan is against the wind, a regenerative current is applied by the fan driver to brake the fan to a certain speed range or to a standstill.

[0030] When the fan brakes to a certain speed range or comes to a standstill, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0031] Furthermore, determining the wind direction operation status of the fan using the execution result of the rotor capture function includes:

[0032] The rotor angle is obtained using the execution result of the rotor capture function.

[0033] The wind direction and operating status of the fan are determined by the angle of the rotor.

[0034] Secondly, this application provides a noise optimization control device for rotor capture, the device comprising:

[0035] The acquisition module is used to acquire the start command issued by the wind turbine;

[0036] The first data processing module is used to output the first voltage data by using the start command issued by the wind turbine and by voltage detection and comparison.

[0037] The second data processing module is used to determine the current operating state of the fan using the first voltage data;

[0038] The third data processing module is used to execute the corresponding motion mode based on the determination result of the current motion state of the wind turbine, and obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0039] Thirdly, this application provides a noise optimization control device for rotor capture, the device comprising:

[0040] Memory, on which executable programs are stored;

[0041] A processor for executing the executable program in the memory to implement the steps of any of the methods described above.

[0042] Fourthly, this application provides a computer-readable storage medium storing computer instructions for causing a computer to perform the steps of any of the methods described above.

[0043] The technical solution provided in this application may include the following beneficial effects:

[0044] This application obtains the start command issued by the fan; uses the start command to output first voltage data through voltage detection and comparison; uses the first voltage data to determine the current motion state of the fan; and uses the determination result of the current motion state of the fan to execute the corresponding motion mode, thereby obtaining the relevant results of noise optimization control during rotor capture under single-resistance sampling. By detecting and comparing voltage to output first voltage data, and using the first voltage data to determine the current motion state of the fan and execute the corresponding motion mode, noiseless start-up during rotor capture using single-resistance sampling is achieved.

[0045] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0046] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0047] Figure 1 This is a schematic flowchart of a noise optimization control method for rotor capture provided in one embodiment of this application;

[0048] Figure 2 This is a hardware schematic diagram of a noise-free single-resistor sampling rotor capture according to an embodiment of this application;

[0049] Figure 3 This is another embodiment of the present application, providing a flowchart of a noiseless start-up control for single-resistance sampling rotor capture.

[0050] Figure 4 This is a schematic diagram of a noise optimization control device for rotor capture provided in one embodiment of this application;

[0051] Figure 5 This is a schematic diagram of a noise optimization control device for rotor capture provided in one embodiment of this application. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0053] Industrial fans installed outdoors are affected by external wind forces, and may be stationary, with the wind, or against the wind. Before starting the fan, it is necessary to detect the rotor position to determine whether it is stationary, with the wind, or against the wind, as well as the specific angle information. If it is stationary, the fan can be started by opening the loop and then closing it, or by directly starting the fan with a closed loop. If it is with the wind, the rotor position is locked using a rotor position capture algorithm, and the fan is started directly with the wind in a closed loop. If it is against the wind, the rotor position is locked using a rotor position capture algorithm, the fan is first braked with regenerative current, and when the speed approaches 0, the fan is started by opening the loop and then closing it, or by directly starting the fan with a closed loop.

[0054] The rotor capture algorithm works by locking the actual rotor speed and position information with the observer's estimated values ​​before providing torque to the motor. Therefore, the rotor capture function must be executed before motor startup. During rotor capture, only the current loop is executed, controlling the currents Id (direct-axis current) and Iq (quadrature-axis current) to 0, while the flux-locked loop attempts to lock the actual motor speed and rotor angle.

[0055] Industrial fans typically do not have position sensors due to structural and cost limitations. However, accurate acquisition of motor winding current is crucial for the accuracy of rotor position observers. In fan applications, current is sampled in each PWM cycle. Single-resistor sampling places higher demands on motor winding current sampling, requiring reconstruction of the three-phase winding current based on the total bus current at different times. The advantages of single-resistor sampling are lower cost, simpler board layout, and reduced heat generation from the sampling resistor. Single-resistor sampling uses a phase-shifting method. For a stationary fan rotor, during rotor capture, the motor's Id and Iq currents are zero after CLARK and PARK transformations. Since the rotor is not rotating, the motor phase current is close to zero, and the PWM drive duty cycle is very narrow, resulting in a very small current sampling window. The phase-shifting method causes the space vector pulse width modulation (SVPWM) vector pointer to swing between two sectors. This swinging causes audible noise. When the rotor rotates, and the control Id and Iq currents are 0 during rotor capture, the motor phase current is greater than 0. The PWM drive duty cycle increases, and the current sampling window also widens. The vector pointer can rotate smoothly within the SVPWM sector, so no noise is generated.

[0056] To at least partially overcome the problem in related technologies where rotor capture during rotor capture when the fan rotor is stationary, caused by single-resistor sampling in sensorless fan applications, resulting in noise that can affect human hearing, this application provides a noise optimization control method, apparatus, device, and storage medium for rotor capture. To prevent noise caused by rotor capture during stationary start-up, this invention first determines whether the fan rotor is running before rotor capture. It samples any two phases of the motor output voltage U, V, and W, divides them, and connects the two phase voltages to the positive terminals of two comparators. The negative terminals of the comparators are connected to the positive terminals through resistors. The negative terminals of the comparators act as a virtual neutral point. The outputs of the two comparators are subtracted. If a pulse is detected, it indicates that the fan rotor is in a headwind or headwind state, and rotor capture is initiated directly, followed by start-up based on headwind or headwind logic. If the output is 0, it indicates that the fan rotor is stationary, and the fan is started either by opening the loop and then closing the loop, or by directly starting the fan in a closed-loop manner. This addresses the noise problem caused by rotor capture during rotor capture when the fan rotor is stationary due to single-resistor sampling in sensorless fan applications.

[0057] Example

[0058] Please see Figure 1 , Figure 1 This is a schematic flowchart of a noise optimization control method for rotor capture according to an embodiment of this application. The method includes:

[0059] S1. Obtain the start command issued by the fan;

[0060] S2. Using the start command issued by the fan, output the first voltage data through voltage detection and comparison;

[0061] S3. Using the first voltage data, determine the current operating state of the fan;

[0062] S4. Using the determination result of the current motion state of the fan, execute the corresponding motion mode to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0063] In one embodiment, as described in step S2, the step of using the start command issued by the wind turbine to output first voltage data through voltage detection and comparison includes:

[0064] Using the start command issued by the fan, the output voltage of the motor in the pre-obtained sampling motor is divided by a preset first resistor;

[0065] The output voltage of the motor after voltage division is connected to the positive terminal of the corresponding comparator, and the negative terminal of the comparator is connected to one end of a preset second resistor.

[0066] If the comparator has a pulse output, the microcontroller is used to obtain the high or low level of the pulse.

[0067] The first voltage data is output by utilizing the high and low levels of the pulse.

[0068] In practice, the method is as follows: Any two phases of the sampled motor output voltage U, V, and W are divided and connected to the positive terminals of two comparators. The negative terminals of each comparator are connected to the positive terminals via a resistor. The negative terminals of the comparators act as a virtual neutral point. The outputs of the two comparators are subtracted. If a pulse is detected, it indicates that the fan rotor is in a headwind or tailwind state. The rotor capture logic is then applied to start the fan based on the headwind or tailwind logic. If the output is 0, it indicates that the fan rotor is stationary. The fan is started either by opening the loop and then switching to a closed loop, or by directly starting the fan using a closed-loop start.

[0069] It should be noted that noise only occurs when the rotor is captured in a single-resistor sampling and stationary state. Normal open-loop to closed-loop switching or direct closed-loop start-up itself does not produce noise.

[0070] It should be noted that the specific operation of the above control process is as follows: the fan issues a start command, and the fan control board hardware circuit collects the data as follows: Figure 2The diagram shows any two phases of voltage (U, V, W), with U and W as an example. After being divided by resistors, the voltages are sent to the positive terminals of two comparators. The negative terminals of the comparators are connected to one end of resistors R7 and R8, forming a virtual midpoint. The U and W voltages after the voltage division are then connected to the other ends of resistors R7 and R8. If comparators U1B and U2B output pulses, it indicates that there is a periodic difference between the U-phase and W-phase voltages. Connecting the comparator outputs to a general-purpose I / O port of an MCU (microcontroller) allows the MCU to determine the number of pulses based on the high and low voltage levels. The number of pulses per unit time can then be used to calculate the fan speed.

[0071] Furthermore, determining the current operating state of the wind turbine using the first voltage data includes:

[0072] Compare the first voltage data with a preset first state threshold;

[0073] If the first voltage data is less than or equal to the first state threshold, then the current operating state of the fan is determined to be either low-speed operation mode or stationary operation mode.

[0074] If the first voltage data is greater than the first state threshold, then the current operating state of the fan is determined to be high-speed operation mode.

[0075] In practice, it is necessary to adjust according to the actual situation. Currently, the voltage comparison point of our comparator is 0.1V. If it is higher than 0.1V, it is considered to be either with or against the wind. If it is lower than 0.1V, it is considered to be in a stationary or extremely low-speed operating state.

[0076] Furthermore, using the determination result of the current motion state of the wind turbine, the corresponding motion mode is executed to obtain the relevant results of noise optimization control during rotor capture under single resistance sampling, including:

[0077] If the current motion state of the fan is stationary or low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0078] If the current operating state of the fan is high-speed operation mode, then the second operating mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0079] Furthermore, if the current motion state of the fan is stationary or in a low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control during rotor capture under single-resistance sampling, including:

[0080] If the current motion state of the fan is stationary or in low-speed operation mode, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0081] Furthermore, if the current operating state of the wind turbine is high-speed operation mode, then the second operating mode is executed to obtain the relevant results of noise optimization control during rotor capture under single-resistance sampling, including:

[0082] If the current operating state of the fan is high-speed operation mode, then the rotor capture function is executed;

[0083] The wind direction and operating status of the fan are determined by using the execution result of the rotor capture function.

[0084] If the fan is operating with the wind, it will start up with the wind.

[0085] If the wind direction of the fan is against the wind, a regenerative current is applied by the fan driver to brake the fan to a certain speed range or to a standstill.

[0086] When the fan brakes to a certain speed range or comes to a standstill, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0087] Furthermore, determining the wind direction operation status of the fan using the execution result of the rotor capture function includes:

[0088] The rotor angle is obtained using the execution result of the rotor capture function.

[0089] The wind direction and operating status of the fan are determined by the angle of the rotor.

[0090] In specific implementation, such as Figure 3 As shown, after determining the rotor's motion state based on the output voltage, if it is determined that the fan is stationary or operating at extremely low speed, the fan can be started. The starting method can be either an open-loop start-up to a certain speed followed by a closed-loop start, or a direct closed-loop start based on the observer's angle value.

[0091] If the fan is detected to be rotating and the speed exceeds a certain value, the rotor capture function is activated, controlling the decoupled phase currents Id (direct-axis current) and Iq (quadrature-axis current) to be 0. Once the fan reaches a certain speed, the phase current exceeds 0, increasing the sampling window for single-resistance sampling. Even with phase shifting, the bus current can still be correctly sampled within the window to reconstruct the motor's three-phase current. This allows the rotor capture function to operate normally while minimizing noise. Furthermore, the rotor capture activation time can be extended from 500ms to 1s, ensuring the rotor position observer can accurately estimate the rotation direction, speed, and rotor position information.

[0092] Furthermore, it can be determined whether the wind turbine is in a downwind or upwind state. If it is in a downwind state, it can be started directly according to the downwind principle. If it is in a upwind state, the wind turbine driver needs to apply regenerative current to brake the wind turbine. After braking to a certain speed range or coming to a stop, it can operate according to the normal start-up logic. The start-up method can be to open-loop to a certain speed and then switch to closed-loop, or to directly close-loop start-up based on the angle value of the observer.

[0093] It should be noted that we use rotor capture to determine whether the wind is tailwind or headwind. We control the Id and Iq currents to 0, and then we can obtain the rotor angle through the algorithm. The angle is then used to determine whether the wind is tailwind or headwind.

[0094] Current technologies typically use three-resistor or two-resistor sampling for wind turbines to avoid noise during rotor capture. However, three-resistor and two-resistor sampling incur additional costs and wiring complexity for wind turbine drive current sampling. Using single-resistor sampling increases wind turbine drive reliability and provides timely and accurate current protection, offering numerous advantages for high-power applications.

[0095] In single-resistance sampling applications, if the rotor's pre-start motion state is not considered—for example, water pumps, compressors, and air compressors do not exhibit clockwise or counterclockwise rotation due to external forces—the rotor capture function can be disabled in the control algorithm. However, for fan applications, especially in outdoor environments, the fan rotor may be stationary, in a downwind or upwind state due to external wind or other equipment influences. Enabling rotor capture inevitably introduces noise. Current technologies typically reduce the rotor capture time to minimize noise impact on the human ear. However, shortening the rotor capture time also carries the risk of inaccurate rotor position identification.

[0096] In one embodiment, this application uses single-resistor sampling in wind turbine applications to eliminate noise caused by current sampling during rotor capture. The method involves adding a motor output voltage detector and comparator to the circuitry in hardware, and in software, using the presence or number of pulses in the comparator output to roughly determine whether the wind turbine is stationary or operating at low speed. If stationary or low-speed operation is detected, the wind turbine can be started directly, either through an open-loop start-up followed by a closed-loop start, or a direct closed-loop start.

[0097] This application obtains the start command issued by the fan; uses the start command to output first voltage data through voltage detection and comparison; uses the first voltage data to determine the current motion state of the fan; and uses the determination result of the current motion state of the fan to execute the corresponding motion mode, thereby obtaining the relevant results of noise optimization control during rotor capture under single-resistance sampling. By detecting and comparing voltage to output first voltage data, and using the first voltage data to determine the current motion state of the fan and execute the corresponding motion mode, noiseless start-up during rotor capture using single-resistance sampling is achieved.

[0098] Please see Figure 4 , Figure 4 This is a schematic diagram of a noise optimization control device for rotor capture according to an embodiment of this application. The device includes:

[0099] The acquisition module 41 is used to acquire the start command issued by the wind turbine;

[0100] The first data processing module 42 is used to output first voltage data by using the start command issued by the fan, through voltage detection and comparison;

[0101] The second data processing module 43 is used to determine the current operating state of the fan using the first voltage data;

[0102] The third data processing module 44 is used to execute the corresponding motion mode based on the determination result of the current motion state of the fan, and obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

[0103] Thirdly, this application provides a noise optimization control device for rotor capture, the device comprising:

[0104] Please see Figure 5 , Figure 5 This is a schematic diagram of a noise optimization control device for rotor capture according to an embodiment of this application. The device includes:

[0105] Memory 51, on which an executable program is stored;

[0106] Processor 52 is configured to execute the executable program in the memory 51 to implement the steps of any of the methods described above.

[0107] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0108] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0109] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0110] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0111] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it includes one or a combination of the steps of the method embodiments.

[0112] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0113] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0115] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A noise optimization control method for rotor capture, characterized in that, The method includes: Receive the start command from the wind turbine; Using the start command issued by the fan, the first voltage data is output through voltage detection and comparison; The current operating state of the fan is determined using the first voltage data; Using the determination result of the current motion state of the fan, the corresponding motion mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling; The step of using the determination result of the current motion state of the wind turbine to execute the corresponding motion mode and obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling includes: If the current motion state of the fan is stationary or low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling. If the current operating state of the fan is high-speed operation mode, then the second operating mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling. If the current motion state of the wind turbine is stationary or in a low-speed operation mode, then the first motion mode is executed to obtain the relevant results of noise optimization control under single-resistance sampling rotor capture, including: If the current operating state of the fan is stationary or in low-speed operation mode, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling; If the current operating state of the wind turbine is high-speed operation, then the second operating mode is executed to obtain the relevant results of noise optimization control when the rotor is captured under single-resistance sampling, including: If the current operating state of the fan is high-speed operation mode, then the rotor capture function is executed; The wind direction and operating status of the fan are determined by using the execution result of the rotor capture function. If the fan is operating with the wind, it will start up with the wind. If the wind direction of the fan is against the wind, a regenerative current is applied by the fan driver to brake the fan to a certain speed range or to a standstill. When the fan brakes to a certain speed range or comes to a standstill, the open loop is pulled to a preset first speed and then the closed loop is switched, or the fan is started directly in closed loop based on the angle value of the pre-obtained observer, so as to obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

2. The method according to claim 1, characterized in that, The step of using the start command issued by the wind turbine to output first voltage data through voltage detection and comparison includes: Using the start command issued by the fan, the output voltage of the motor in the pre-obtained sampling motor is divided by a preset first resistor; The output voltage of the motor after voltage division is connected to the positive terminal of the corresponding comparator, and the negative terminal of the comparator is connected to one end of a preset second resistor. If the comparator has a pulse output, the microcontroller is used to obtain the high or low level of the pulse. The first voltage data is output by utilizing the high and low levels of the pulse.

3. The method according to claim 1, characterized in that, Determining the current operating state of the wind turbine using the first voltage data includes: Compare the first voltage data with a preset first state threshold; If the first voltage data is less than or equal to the first state threshold, then the current operating state of the fan is determined to be either low-speed operation mode or stationary operation mode. If the first voltage data is greater than the first state threshold, then the current operating state of the fan is determined to be high-speed operation mode.

4. The method according to claim 1, characterized in that, The determination of the wind direction operation status of the fan using the execution result of the rotor capture function includes: The rotor angle is obtained using the execution result of the rotor capture function. The wind direction and operating status of the fan are determined by the angle of the rotor.

5. A noise optimization control device for rotor capture, applied to the noise optimization control method for rotor capture according to any one of claims 1-4, characterized in that, The device includes: The acquisition module is used to acquire the start command issued by the wind turbine; The first data processing module is used to output the first voltage data by using the start command issued by the wind turbine and by voltage detection and comparison. The second data processing module is used to determine the current operating state of the fan using the first voltage data; The third data processing module is used to execute the corresponding motion mode based on the determination result of the current motion state of the wind turbine, and obtain the relevant results of noise optimization control when the rotor is captured under single resistance sampling.

6. A noise optimization control device for rotor capture, characterized in that, The device includes: Memory, on which executable programs are stored; A processor for executing the executable program in the memory to implement the steps of the method according to any one of claims 1-4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the steps of the method according to any one of claims 1-4.

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