A fan control method and device, storage medium and electronic equipment

Abstract

The application provides a fan control method and device, a storage medium and an electronic device, which collect the current working temperature of a device in the equipment to which the fan belongs and the current output current of the fan; determine the temperature difference of the device based on the working temperature of the device and a preset reference temperature; and control the rotating speed of the fan based on the temperature difference, the fan rotating speed control curve and the output current. The application controls the rotating speed of the fan by collecting the temperature of the temperature collection point in the equipment to which the fan belongs, controls the fan in real time according to the working temperature of the equipment, controls the rotating speed of the fan with reference to the working temperature of the device in the equipment, cools the device in the equipment in time, avoids the situation that the device is burned out due to high temperature, controls the fan by introducing the temperature, and makes the control logic of the fan more detailed and improves the accuracy of the fan control.

Description

Technical Field

[0001] This invention relates to the field of wind turbine control technology, and in particular to a wind turbine control method and device, storage medium and electronic equipment. Background Technology

[0002] Fans are widely used in various fields such as metallurgy, petrochemicals, and power. They can be used for ventilation and air exchange, as well as to reduce the temperature rise of mechanical equipment during operation, thereby ensuring that the mechanical equipment is kept within a suitable temperature range and avoiding overheating that could burn out components.

[0003] Traditional fan control methods mainly rely on the output current of the motor. Usually, regardless of the ambient temperature, when the output current of the motor reaches the preset value, the fan is controlled to run at full speed. This control method does not consider the temperature of the components of the mechanical equipment using the fan, resulting in low control accuracy and a high risk of burning out components in the equipment using the fan. Summary of the Invention

[0004] In view of this, the present invention provides a fan control method and device, a storage medium and an electronic device. The present invention introduces temperature control to control the fan speed, thereby improving the control accuracy of the fan and effectively avoiding the situation where the equipment using the fan burns out components due to high temperature.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A fan control method, comprising:

[0007] The current operating temperature of the components in the equipment to which the fan belongs, and the current output current of the fan are collected;

[0008] The temperature difference of the device is determined based on the operating temperature of the device and the preset reference temperature;

[0009] The fan speed is controlled based on the temperature difference, the fan speed control curve, and the output current.

[0010] Optionally, in the above method, the current operating temperature of the components in the equipment to which the fan belongs is collected, including:

[0011] The temperature acquisition device set on the device is invoked to collect the current operating temperature of the device.

[0012] Optionally, the method described above, wherein controlling the fan speed based on the temperature difference, the fan speed control curve, and the output current, includes:

[0013] Obtain the duty cycle calculation strategy corresponding to the fan speed control curve;

[0014] In the duty cycle calculation strategy, a sub-strategy corresponding to the output current is determined;

[0015] The temperature difference and the computational sub-strategy are used to determine the duty cycle of the fan, and the fan speed is controlled based on the duty cycle.

[0016] Optionally, in the above method, determining the sub-strategy corresponding to the output current in the duty cycle calculation strategy includes:

[0017] Obtain the rated current of the fan;

[0018] Based on the rated current, determine the application conditions of each sub-strategy in the duty cycle calculation strategy;

[0019] Determine the application conditions that the output current satisfies, and determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

[0020] Optionally, in the above method, when the operating temperature of at least one device is collected, the process of determining the duty cycle of the fan by applying the temperature difference and the computational sub-strategy includes:

[0021] When the temperature difference of each of the devices is less than or equal to zero, the temperature parameter in the calculation sub-strategy is determined to be zero, and the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0022] When there is a temperature difference greater than zero among the temperature differences of the various devices, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0023] A fan control device, comprising:

[0024] The data acquisition unit is used to acquire the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan.

[0025] The determining unit is used to determine the temperature difference of the device based on the operating temperature of the device and a preset reference temperature;

[0026] The control unit is used to control the speed of the fan based on the temperature difference, the fan speed control curve of the fan, and the output current.

[0027] Optionally, in the aforementioned device, the data acquisition unit performs the process of acquiring the current operating temperature of the components in the equipment to which the fan belongs, including:

[0028] The temperature acquisition device set on the device is invoked to collect the current operating temperature of the device.

[0029] Optionally, the control unit in the aforementioned device includes:

[0030] A sub-unit is used to obtain the duty cycle calculation strategy corresponding to the fan speed control curve;

[0031] A sub-unit is defined for determining the operation sub-strategy corresponding to the output current in the duty cycle operation strategy;

[0032] A control subunit is used to determine the duty cycle of the fan by applying the temperature difference and the calculation sub-strategy, and to control the speed of the fan based on the duty cycle.

[0033] Optionally, the determining subunit in the aforementioned apparatus includes:

[0034] An acquisition module is used to acquire the rated current of the fan;

[0035] The first determining module is used to determine the application conditions of each sub-strategy in the duty cycle calculation strategy based on the rated current.

[0036] The second determining module is used to determine the application conditions satisfied by the output current, and to determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

[0037] Optionally, in the aforementioned apparatus, when the operating temperature of at least one device is collected, the control subunit performs a process of determining the duty cycle of the fan by applying the temperature difference and the computational sub-strategy, including:

[0038] When the temperature difference of each of the devices is less than or equal to zero, the temperature parameter in the calculation sub-strategy is determined to be zero, and the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0039] When there is a temperature difference greater than zero among the temperature differences of the various devices, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0040] A storage medium comprising stored instructions, wherein, when the instructions are executed, the device in which the storage medium is located is controlled to perform the fan control method as described above.

[0041] An electronic device includes a memory and one or more instructions, wherein one or more instructions are stored in the memory and configured to be executed by one or more processors as described above for the fan control method.

[0042] Compared with the prior art, the present invention has the following advantages:

[0043] This invention provides a fan control method and apparatus, storage medium, and electronic device, comprising: acquiring the current operating temperature of components in the equipment to which the fan belongs, and the current output current of the fan; determining the temperature difference between the components based on their operating temperature and a preset reference temperature; and controlling the fan speed based on the temperature difference, the fan speed control curve, and the output current. This invention controls the fan speed by acquiring the temperature of a temperature acquisition point in the equipment to which the fan belongs. Therefore, the fan can be controlled in real time based on the operating temperature of the equipment, and the fan speed can be controlled by referring to the operating temperature of the components in the equipment. This allows for timely cooling of the components, preventing overheating and damage. Furthermore, by introducing temperature control into the fan control, the control logic of the fan becomes more refined, ensuring that the fan speed remains within a suitable range and improving the accuracy of fan control. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0045] Figure 1 This is a flowchart of a fan control method provided in an embodiment of the present invention;

[0046] Figure 2 This is an example diagram of the fitting curve of the main fan provided in an embodiment of the present invention;

[0047] Figure 3 An example diagram of the fitting curve of the electronic cavity heat dissipation fan provided in an embodiment of the present invention;

[0048] Figure 4 A flowchart illustrating a method for controlling the speed of a fan based on temperature difference, the fan speed control curve, and output current, as provided in an embodiment of the present invention.

[0049] Figure 5 This is a flowchart of a method for determining the sub-strategy corresponding to the output current in a duty cycle calculation strategy, as provided in an embodiment of the present invention.

[0050] Figure 6 This is a schematic diagram of the structure of a fan control device provided in an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0052] 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.

[0053] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] Fans are widely used for cooling mechanical equipment or ventilating environments, such as inverters. Current fan control methods involve the fan running at full speed when its output current reaches a preset value, regardless of the ambient temperature. This control method not only damages the fan itself, but the noise generated during operation also leads to complaints.

[0055] Therefore, the present invention provides a fan control method and device, storage medium and electronic device, which determines the fan speed based on the temperature of the components in the equipment using the fan, and controls the fan speed by relying on the temperature of the temperature acquisition point in the equipment using the fan, thereby achieving precise control of the fan and cooling the equipment.

[0056] This invention can be used in a wide variety of general-purpose or special-purpose computing device environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor devices, distributed computing environments including any of the above devices, etc. The executing entity of this invention can be a controller or a processor.

[0057] Reference Figure 1 The following is a flowchart of a fan control method provided by an embodiment of the present invention, which is described in detail below:

[0058] S101. Collect the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan.

[0059] The equipment to which the fan belongs is the mechanical equipment that uses the fan. The mechanical equipment can be a large mechanical equipment integrated with a large number of electrical components, or it can be a supporting equipment composed of a large number of electrical components, or equipment that requires the use of fans in various industrial scenarios.

[0060] Preferably, the equipment can use multiple fans or just one fan, and the types of fans used can be different. The specific type of fan used can be determined according to actual needs.

[0061] The fan of the present invention can be of various types, such as main fan, turbulence fan, centrifugal fan, etc.

[0062] The device here is one that requires temperature measurement. Preferably, this device can be one that requires cooling protection; the specific device can be selected according to actual needs. Preferably, when collecting the operating temperature of the device, a temperature acquisition device can be used to collect the operating temperature. Furthermore, the temperature acquisition device can be located at the device's temperature sampling point; preferably, the sampling point can be set according to actual needs. For example, a PCB board can be fixed on the AC / DC copper busbar to collect the operating temperature of the AC / DC copper busbar. By setting a fixed temperature acquisition device to collect the operating temperature, more accurate temperatures can be obtained. Furthermore, temperature sampling can also be performed by deploying an NTC (Network Temperature Controller), and then the sampled data can be processed by a DSP (Digital Signal Processor) to achieve autonomous and automated processing.

[0063] Furthermore, each device can be equipped with multiple temperature sensors. When collecting the current operating temperature of the device, the temperatures collected by each temperature sensor are compared, and the temperature with the highest value is determined as the current operating temperature of the device.

[0064] Preferably, the present invention can also collect the ambient temperature of the equipment, which can be done by setting corresponding devices. For example, the ambient temperature collection points in the equipment can be the inlet and outlet ambient temperature collection points of the fan. The collected operating temperature is the actual temperature.

[0065] The number of devices requiring cooling protection must be at least one, and the number of temperature acquisition points for each device requiring cooling protection must be at least one. The temperature acquired at each temperature acquisition point is the operating temperature of the device, which can be regarded as the ambient temperature of the device.

[0066] For example, devices requiring cooling protection include, but are not limited to, IGBTs, DC capacitors, AC capacitors, reactors, AC / DC copper busbars, bare PCB boards, and PCB components. Each device is equipped with a temperature acquisition point. Furthermore, the temperatures of these devices requiring cooling protection can be used for hysteresis control of the fan.

[0067] For example, the operating temperatures of each device can be: IGBT core temperature, DC capacitor core temperature, AC capacitor core temperature, reactor temperature, AC / DC copper busbar temperature, PCB bare board temperature, and PCB device temperature.

[0068] S102. Determine the temperature difference of the device based on the device's operating temperature and the preset reference temperature.

[0069] Furthermore, the operating temperature of the preset temperature sampling point is subtracted from the preset reference temperature to obtain the temperature difference of the preset sampling point. Preferably, the temperature difference of the preset temperature sampling point is equal to the difference between the operating temperature and the reference temperature.

[0070] The reference temperature of the preset temperature sampling point can be set according to actual needs or determined based on the actual device temperature and limit requirements. Preferably, when the preset temperature sampling point is the sampling point of a device that requires cooling protection, the reference temperature can be the highest temperature that the device can withstand. Preferably, in order to ensure the normal operation of the device and avoid affecting the device's service life after the operating temperature reaches the device's critical value, the reference temperature can be lower than the highest temperature that the device can withstand.

[0071] For example, the temperature detection devices in the main fan can be modules, reactors, etc. Furthermore, for the main fan of an inverter, reactor temperature and IGBT temperature can be selected for hysteresis control of the main fan. The temperature detection devices in the turbulence fan can be AC ​​switches, DC switches, AC capacitors, etc. The devices used for temperature detection in different fans can be selected according to the actual project requirements. Furthermore, the reference temperature of each device requiring temperature detection can be set comprehensively according to project requirements.

[0072] S103. Based on the temperature difference, the fan speed control curve, and the output current, control the fan speed.

[0073] The fan rotation control curve of a blower is obtained after extensive testing of the blower under various ambient temperatures and operating conditions. Different blowers have different fan rotation control curves.

[0074] Furthermore, the fan speed control curve includes various strategies for controlling the fan speed, covering strategies for controlling the fan speed under various operating conditions.

[0075] The method provided in this invention involves collecting the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan; determining the temperature difference between the components based on their operating temperature and a preset reference temperature; and controlling the fan speed based on the temperature difference, the fan speed control curve, and the output current. This invention controls the fan speed by collecting the temperature at a temperature acquisition point in the equipment to which the fan belongs. Therefore, the fan can be controlled in real time based on the equipment's operating temperature, ensuring the fan speed remains within a suitable range. This improves the accuracy of fan control, reduces the likelihood of the fan running at full speed, thus reducing noise generated during operation and effectively preventing component burnout.

[0076] Furthermore, the fan rotation control curve needs to be fitted by collecting a large amount of experimental data from the fan. For example, the machine is placed in an aging chamber, and the device temperature is tested under different operating conditions. These operating conditions are related to ambient temperature, power factor (PF), and output current. For example, an ambient temperature of 20°C, PF = 0.8, and an output current of 10%In represent one operating condition; an ambient temperature of 20°C, PF = 1, and an output current of 10%In represent another; an ambient temperature of 5°C, PF = 1, and an output current of 10%In represent yet another. The operating conditions can be set according to actual needs. This invention is not limited to the exemplified conditions, and will not be further illustrated here. After setting the operating condition data, the fan speed is manually controlled to stabilize the machine device temperature within specific limits. The fan duty cycle and the temperature of the specific device are recorded at this time. Preferably, data from multiple different operating conditions can be collected.

[0077] Furthermore, the duty cycle of the fan and the temperature of components requiring cooling protection are recorded under different ambient temperatures, operating conditions, and fan output currents. Based on the recorded data, curves of the fan's duty cycle and output current are plotted, and a curve that meets the limit requirements is fitted to set the speed control range. The main logic is based on the measured curves, which are almost concave. A straight line can be drawn from the temperature parameters of the two worst operating conditions to define the speed boundary and set the speed control range.

[0078] Reference Figure 2This is an example diagram of the main fan fitting curve provided in an embodiment of the present invention. The diagram includes curves of duty cycle and output current of the fan under different ambient temperatures. As shown in the figure, it includes curves for fitting at 45℃, 40℃, 20℃, 10℃, 0℃, and -10℃. It should be noted that the curves shown in the figure are only a partial list. The duty cycle and output current curves are plotted based on the recorded data. The recorded data is not shown in this invention. Then, a curve that meets the limit requirements is fitted, and the speed control range is set. The main logic is based on the measured curves. Because the curves are almost concave, a straight line can be drawn from the temperature parameters of the two worst operating conditions to define the speed boundary and set the speed control range.

[0079] For example, Figure 2 The curves at 45℃, 40℃, 20℃, 10℃, 0℃, and -10℃ are all measured curves, while the fitted curve at 45℃ is a fitted curve. Figure 2 The following curves, plotted to represent the temperatures of various machine components under different ambient temperatures, are specific to the control of the main fan. The measured curves are generally concave; the higher the current, the steeper the slope of the duty cycle increase. The fan must start when the current exceeds 10% of the rated current, and this can cover a temperature range of -30 to 50°C. The starting point can be defined as 10% of the rated current, and the minimum current corresponding to full speed can be defined as the fan speed termination point. Based on the concave curves, a straight line can be drawn using the two-point method, and this line can be used to define the fan speed boundary. The speed regulation range is shown in the shaded area in the diagram below.

[0080] Reference Figure 3 This is an example diagram of the fitting curve for an electronic cavity cooling fan provided in an embodiment of the present invention. Further, the electronic cavity cooling fan can also be called a turbulence fan. The diagram includes curves of the fan's duty cycle and output current at different ambient temperatures, as shown in the figure, including curves at 45℃, 40℃, 30℃, and 10℃. It should be noted that the curves shown in the figure are only a partial list. The diagram indicates that after the turbulence fan starts (starting duty cycle 0.4), it can cover temperatures from -30℃ to 50℃ and current applications below 75%. Below 35% current, the turbulence fan does not need to rotate. The shaded area in the diagram represents the speed regulation range of the turbulence and external circulation fans.

[0081] Furthermore, the present invention provides Figure 2 and Figure 3 The data in this paper are merely illustrative examples, and the invention is not limited to these examples when performing fitting. Figure 2 and Figure 3 The data shown can be used to adjust the corresponding parameters according to the specific needs of the project, and then fit the obtained data.

[0082] Reference Figure 4 The flowchart below illustrates a method for controlling the speed of a fan based on temperature difference, a fan speed control curve, and output current, as provided in this embodiment of the invention. The details are as follows:

[0083] S201. Obtain the duty cycle calculation strategy corresponding to the fan speed control curve.

[0084] Preferably, the duty cycle calculation strategy corresponds to different content for different fan speed control curves. The duty cycle calculation strategy covers the control strategy for the fan speed under different conditions.

[0085] Duty cycle calculation strategies can be represented using piecewise functions.

[0086] For example, when the duty cycle calculation strategy of the main wind turbine is represented using a piecewise function, it is as follows:

[0087]

[0088] Where D is the fan's duty cycle, ΔT is the temperature parameter, i0 is the fan's output current, and I... n This is the rated current of the fan. This is the ratio of the fan's output current to its rated current.

[0089] For example, the duty cycle calculation strategy for a turbulence fan, when represented using a piecewise function, is as follows:

[0090]

[0091] Where D is the fan's duty cycle, ΔT is the temperature parameter, i0 is the fan's output current, and I... n This is the rated current of the fan. This is the ratio of the fan's output current to its rated current.

[0092] Furthermore, different functions in a piecewise function represent different sub-strategies of operations.

[0093] S202. Determine the sub-strategy corresponding to the output current in the duty cycle calculation strategy.

[0094] The duty cycle calculation strategy contains multiple sub-strategies, each of which is applied under different conditions.

[0095] Reference Figure 5 The following is a flowchart of a method for determining the sub-strategy corresponding to the output current in a duty cycle calculation strategy according to an embodiment of the present invention, which is described in detail below:

[0096] S301. Obtain the rated current of the fan.

[0097] The rated current of the fan is a fixed value, which is a parameter of the fan equipment.

[0098] S302. Based on the rated current, determine the application conditions of each sub-strategy in the duty cycle operation strategy.

[0099] For example, the application conditions for each operational sub-strategy are different. Taking the main wind turbine as an example above, the piecewise function of the main wind turbine has two functions. Among them, the application condition of the function D = 0.13 + 0.08ΔT is i0 ≤ 0.35I. n ; The application condition is i0 > 0.35I. n .

[0100] S303. Determine the application conditions that the output current must meet, and determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

[0101] For example, when the output current of the fan is less than or equal to 35% of the rated current of the fan, the function D = 0.13 + 0.08ΔT is the sub-strategy that meets the condition, and then the function is applied to control the speed of the fan.

[0102] In the method provided by this invention, the duty cycle calculation strategy includes multiple calculation sub-strategies. By using the rated current of the fan and the current output current, the applicable calculation sub-strategy can be determined, and then the fan speed is controlled based on the determined calculation sub-strategy.

[0103] S203. Using temperature difference and operational sub-strategy, determine the duty cycle of the fan and control the fan speed based on the duty cycle.

[0104] In the method provided by the embodiments of the present invention, the device has at least one device that needs to collect temperature. Therefore, there is at least one temperature difference. When using the temperature difference and the calculation sub-strategy to determine the duty cycle of the fan, the value of the temperature parameter needs to be determined based on the temperature difference.

[0105] For example, when the temperature difference between each device is less than or equal to zero, it means that the operating temperature of each device is lower than the reference temperature. This indicates that the actual operating temperature of each device is within a safe range, meaning that the actual operating temperature of each device will not burn out the device. Therefore, when determining the duty cycle of the fan, the influence of temperature on the fan speed can be disregarded. Thus, the temperature parameter in the calculation sub-strategy is set to zero, and the temperature parameter value is substituted into the calculation based on the calculation sub-strategy to obtain the fan's duty cycle.

[0106] When there is a temperature difference greater than zero among the temperature differences of various components, it indicates that the actual operating temperature of some components has exceeded the reference temperature, which means that some components are at risk of being burned out. Therefore, it is necessary to consider the influence of temperature on the fan speed. Thus, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the operation sub-strategy to obtain the duty cycle of the fan.

[0107] Taking the piecewise function shown in the main fan above as an example, the components that need to be protected against cooling in the equipment using the main fan can be modules and reactors.

[0108] When the output current of the fan is less than or equal to 35% of the rated current, the duty cycle can be determined using the D = 0.13 + 0.08ΔT function in the piecewise function of the main fan. Furthermore, the operating temperature of the module and the operating temperature of the reactor are detected, and examples are given for two cases.

[0109] Scenario 1: When the detected operating temperature of the module is 100℃ and the operating temperature of the reactor is 150℃, assuming the reference temperature of the module is 85℃ and the reference temperature of the reactor is 145℃, the temperature difference between the module and the reactor is 15℃. The temperature difference between the module and the reactor is greater than that between the two. Therefore, the temperature difference between the module and the reactor is used as the temperature parameter value. Substituting the temperature parameter value into the function D = 0.13 + 0.08ΔT, the duty cycle is 1.33. The fan speed is controlled based on the duty cycle. Furthermore, since the duty cycle is greater than 1, the fan speed should be full speed at this time.

[0110] Scenario 2: When the operating temperature of the module is detected to be 75℃ and the operating temperature of the reactor is 125℃, continuing the above assumptions about the reference temperatures of the module and the reactor, it can be known that the temperature difference between the module and the reactor is less than 0. Therefore, the value of the temperature parameter is determined to be 0. Substituting the value of the temperature parameter into the function D=0.13+0.08ΔT, the duty cycle can be obtained as 0.13, and the fan speed is controlled based on this duty cycle.

[0111] When the output current of the fan is greater than 35% of the rated current, it can be determined that the piecewise function of the main fan should be used. The function determines the duty cycle, and further, detects the operating temperature of the module and the reactor, with examples illustrating two scenarios.

[0112] Scenario 1: When the detected operating temperature of the module is 100℃ and the operating temperature of the reactor is 150℃, assuming the reference temperature of the module is 85℃ and the reference temperature of the reactor is 145℃, the temperature difference between the module and the reactor is 15℃. The temperature difference between the module and the reactor is greater than the temperature difference between the two. Therefore, the temperature difference of the module is used as the temperature parameter value. Preferably, the ratio of the output current to the rated current and the temperature parameter value are substituted into the function. The duty cycle can be obtained from this. Preferably, the ratio of the output current to the rated current can be determined based on the current power factor of the fan. Specifically, when the power factor PF = 1, i0 = I n That is, the ratio of the output current to the rated current is 1; when the power factor PF = 0.8, i0 = 0.8I. n This means the ratio of output current to rated current is 0.8. Furthermore, different power factors correspond to different ratios of output current to rated current.

[0113] When the power factor PF = 1, the duty cycle of the fan can be obtained as 2.1, and the fan speed can be controlled based on this duty cycle; when the power factor PF = 0.8, the duty cycle of the fan can be obtained as 1.863, and the fan speed can be controlled based on this duty cycle; furthermore, since the duty cycle is greater than 1, the fan speed should be full speed at this time.

[0114] Scenario 2: When the detected operating temperature of the module is 75℃ and the operating temperature of the reactor is 125℃, assuming the reference temperature of the module is 85℃ and the reference temperature of the reactor is 145℃, it can be seen that the temperature difference between the module and the reactor is less than 0. Therefore, the value of the temperature parameter is determined to be 0. Substituting the ratio of the output current to the rated current and the value of the temperature parameter into the function... The duty cycle can be obtained from the above. Based on the above, when the power factor PF = 1, the duty cycle of the fan can be obtained as 0.9, and the fan speed can be controlled based on this duty cycle. When the power factor PF = 0.8, the duty cycle of the fan can be obtained as 0.663, and the fan speed can be controlled based on this duty cycle.

[0115] Furthermore, the specific application of the duty cycle calculation strategy for the turbulence fan can be found in the example description of the main fan, which will not be elaborated upon here.

[0116] It should be noted that the components in equipment using turbulence fans can be installed on AC switches, DC switches, and AC capacitors.

[0117] The reason why the operating temperature of the components in the equipment that require cooling protection is higher than the reference temperature may be that the fan is stalled or the air duct is blocked, which leads to the excessive operating temperature of the components. Therefore, the fan needs to run at full speed. Furthermore, when the fan is running at full speed, an early warning or error message needs to be issued so that the staff can check the equipment in time.

[0118] In the process of controlling the fan, this invention can set temperature acquisition points for devices such as AC capacitors, reactors, and AC switches that have a relatively fast temperature rise during operation. The operating temperature of the devices acquired at the temperature acquisition points is then used as one of the factors to control the fan speed. This allows the fan speed to be increased when the operating temperature of the devices is high, thereby reducing the operating temperature of the devices and preventing overheating damage to the devices in the equipment, thus strengthening the overheat protection of the devices in the equipment.

[0119] This invention incorporates temperature difference as one of the factors controlling the fan, and adds temperature parameters as one of the factors in the fan's hysteresis control, thereby enabling the fan speed regulation to have negative feedback performance. The fan speed can be adjusted based on different temperatures, thus providing an appropriate rotational speed at different temperatures, allowing the fan to operate under various conditions.

[0120] The fan control scheme provided by this invention can be applied to various types of fans and various types of equipment using fans. Furthermore, this invention controls the fan by increasing the operating temperature of the components within the equipment, making the fan control logic more refined and effectively preventing components from burning out due to excessive operating temperature. This increases the protection of the equipment components. Moreover, when the fan stalls or the duct is blocked and runs at full speed, an early warning can be issued after full speed is reached, allowing personnel to promptly inspect the equipment.

[0121] and Figure 1 Correspondingly, an embodiment of the present invention provides a fan control device, which can be disposed in a controller or processor for controlling a fan; the device is used to support Figure 1 The specific implementation of the method shown.

[0122] Reference Figure 6 The following is a schematic diagram of the structure of a fan control device provided in an embodiment of the present invention, and is described in detail below:

[0123] The data acquisition unit 401 is used to acquire the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan;

[0124] The determining unit 402 is used to determine the temperature difference of the device based on the operating temperature of the device and a preset reference temperature;

[0125] Control unit 403 is used to control the speed of the fan based on the temperature difference, the fan speed control curve of the fan, and the output current.

[0126] In the device provided by this invention, the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan, are collected. Based on the operating temperature of the components and a preset reference temperature, the temperature difference between the components is determined. Based on the temperature difference, the fan speed control curve, and the output current, the fan speed is controlled. This invention controls the fan speed by collecting the temperature at a temperature acquisition point in the equipment to which the fan belongs. Therefore, the fan can be controlled in real time according to the operating temperature of the equipment, and the fan speed can be controlled by referring to the operating temperature of the components in the equipment. This allows for timely cooling of the components in the equipment, preventing overheating and damage. Furthermore, by introducing temperature control into the fan control, the fan control logic becomes more refined, ensuring that the fan speed remains within a suitable range and improving the accuracy of fan control.

[0127] In another embodiment of the present invention, the acquisition unit 401 of the device performs the process of acquiring the current operating temperature of the components in the equipment to which the fan belongs, including:

[0128] The temperature acquisition device set on the device is invoked to collect the current operating temperature of the device.

[0129] In another embodiment provided by the present invention, the control unit 403 of the device can be configured as follows:

[0130] A sub-unit is used to obtain the duty cycle calculation strategy corresponding to the fan speed control curve;

[0131] A sub-unit is defined for determining the operation sub-strategy corresponding to the output current in the duty cycle operation strategy;

[0132] A control subunit is used to determine the duty cycle of the fan by applying the temperature difference and the calculation sub-strategy, and to control the speed of the fan based on the duty cycle.

[0133] In another embodiment provided by the present invention, the determining subunit of the device can be configured as follows:

[0134] An acquisition module is used to acquire the rated current of the fan;

[0135] The first determining module is used to determine the application conditions of each sub-strategy in the duty cycle calculation strategy based on the rated current.

[0136] The second determining module is used to determine the application conditions satisfied by the output current, and to determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

[0137] In another embodiment of the present invention, when the operating temperature of at least one device is collected, the control subunit of the device performs a process of determining the duty cycle of the fan by applying the temperature difference and the computational sub-strategy, including:

[0138] When the temperature difference of each of the devices is less than or equal to zero, the temperature parameter in the calculation sub-strategy is determined to be zero, and the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0139] When there is a temperature difference greater than zero among the temperature differences of the various devices, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

[0140] This invention also provides a storage medium that includes stored instructions, wherein the execution of the instructions controls the device containing the storage medium to perform the aforementioned fan control method.

[0141] This invention also provides an electronic device, the structural schematic of which is shown below. Figure 7 As shown, it specifically includes a memory 601 and one or more instructions 602, wherein one or more instructions 602 are stored in the memory 601 and configured to be executed by one or more processors 603 to perform the above-mentioned wind turbine control method.

[0142] The specific implementation processes and derivative methods of the above embodiments are all within the protection scope of this invention.

[0143] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0144] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0145] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of controlling a fan, characterized by, include: The current operating temperature of the components in the equipment to which the fan belongs, and the current output current of the fan are collected; The temperature difference of the device is determined based on the operating temperature of the device and the preset reference temperature; The fan speed is controlled based on the temperature difference, the fan speed control curve of the fan, and the output current. The method of controlling the fan speed based on the temperature difference, the fan speed control curve, and the output current includes: obtaining a duty cycle calculation strategy corresponding to the fan speed control curve; determining a calculation sub-strategy corresponding to the output current in the duty cycle calculation strategy; applying the temperature difference and the calculation sub-strategy to determine the fan's duty cycle, and controlling the fan speed based on the duty cycle. The process of determining the duty cycle of the fan by applying the temperature difference and the computational sub-strategy, when acquiring the operating temperature of at least one of the devices, includes: When the temperature difference of each of the devices is less than or equal to zero, the temperature parameter in the calculation sub-strategy is determined to be zero, and the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan. When there is a temperature difference greater than zero among the temperature differences of the various devices, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

2. The method of claim 1, wherein, The current operating temperature of the components in the equipment to which the fan belongs includes: The temperature acquisition device set on the device is invoked to collect the current operating temperature of the device.

3. The method according to claim 2, characterized in that, The step of determining the sub-strategy corresponding to the output current in the duty cycle calculation strategy includes: Obtain the rated current of the fan; Based on the rated current, determine the application conditions of each sub-strategy in the duty cycle calculation strategy; Determine the application conditions that the output current satisfies, and determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

4. A fan control device, characterized in that, include: The data acquisition unit is used to acquire the current operating temperature of the components in the equipment to which the fan belongs, as well as the current output current of the fan. The determining unit is used to determine the temperature difference of the device based on the operating temperature of the device and a preset reference temperature; A control unit is used to control the speed of the fan based on the temperature difference, the fan speed control curve of the fan, and the output current; The control unit includes: A sub-unit is used to obtain the duty cycle calculation strategy corresponding to the fan speed control curve; A sub-unit is defined for determining the operation sub-strategy corresponding to the output current in the duty cycle operation strategy; A control subunit is used to determine the duty cycle of the fan by applying the temperature difference and the calculation sub-strategy, and to control the speed of the fan based on the duty cycle; When the operating temperature of at least one of the devices is collected, the control subunit performs a process of determining the duty cycle of the fan by applying the temperature difference and the computational sub-strategy, including: When the temperature difference of each of the devices is less than or equal to zero, the temperature parameter in the calculation sub-strategy is determined to be zero, and the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan. When there is a temperature difference greater than zero among the temperature differences of the various devices, the temperature difference with the largest value that is greater than zero is determined as the value of the temperature parameter, and the value of the temperature parameter is substituted into the calculation based on the calculation sub-strategy to obtain the duty cycle of the fan.

5. The apparatus according to claim 4, characterized in that, The data acquisition unit performs the process of acquiring the current operating temperature of the components in the equipment to which the fan belongs, including: The temperature acquisition device set on the device is invoked to collect the current operating temperature of the device.

6. The apparatus according to claim 4, characterized in that, The determined subunit includes: An acquisition module is used to acquire the rated current of the fan; The first determining module is used to determine the application conditions of each sub-strategy in the duty cycle calculation strategy based on the rated current. The second determining module is used to determine the application conditions satisfied by the output current, and to determine the operation sub-strategy to which the application conditions belong as the operation sub-strategy corresponding to the output current.

7. A storage medium, characterized in that, The storage medium includes stored instructions, wherein, when the instructions are executed, the device containing the storage medium is controlled to perform the wind turbine control method as described in any one of claims 1-3.

8. An electronic device, characterized in that, It includes a memory and one or more instructions, wherein one or more instructions are stored in the memory and configured to be executed by one or more processors as described in any one of claims 1-3.

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