CN116755539B - Fan power supply device, fan power supply method and storage medium of intelligent equipment - Google Patents
Fan power supply device, fan power supply method and storage medium of intelligent equipment Download PDFInfo
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- 230000015654 memory Effects 0.000 claims description 7
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
Abstract
The application discloses a fan power supply device, a fan power supply method and a storage medium of intelligent equipment. The fan power supply device comprises a voltage reduction unit, a PMOS unit and a control unit, wherein the control unit is configured to: monitoring a power supply mode of a power supply, and switching a power supply path according to the conversion of the power supply mode; under the condition that the power supply mode is alternating current power supply or direct current power supply and alternating current power supply are supplied together, a power supply path of the control power supply is output to the fan end through the voltage reduction unit; and under the condition that the power supply mode is direct current power supply, continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be output to the fan end through the voltage reduction unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage. Therefore, the problem of lower noise and working efficiency can be solved, and the service life of the fan power supply device can be prolonged.
Description
Technical Field
The application relates to the technical field of intelligent equipment, in particular to a fan power supply device, a fan power supply method and a storage medium of intelligent equipment.
Background
At present, intelligent devices such as notebook computers are powered on, so that a BUCK (Buck Converter) circuit is used for converting a standard voltage of 12V into a power supply voltage, and then the power supply voltage is output to power a fan. The Buck circuit operates in PFM mode for light load efficiency, but the frequency in this mode falls within the audible range of the human ear, which causes noise problems.
To solve this problem, the existing method generally adopts a BUCK circuit to operate in a PWM mode with an operating frequency exceeding 20KHz, but in the PWM mode, when the fan is under low load, the conversion efficiency of the circuit is poor, for example, when the rotation speed of the fan is 2000 revolutions, the conversion efficiency of the circuit is only 50%. In order to improve the conversion efficiency, the minimum rotation speed of the fan is improved, but this method can improve the noise of the fan, and the user experience is poor. In addition, a method of increasing a large amount of noise-resistant capacitance is also available, but this can only reduce fan noise and cannot be completely eliminated, and the cost increases sharply, and is still not an ideal choice.
Disclosure of Invention
The present application has been made in view of the above-mentioned technical problems occurring in the prior art. The application aims to provide a fan power supply device, a fan power supply method and a storage medium of intelligent equipment, which can reduce noise generated in the power supply process of the fan power supply device, and improve the conversion efficiency and the service life of the fan power supply device at the same time so as to improve the use experience of a user.
According to a first scheme of the application, a fan power supply device of intelligent equipment is provided, the fan power supply device comprises a voltage reduction unit, the input end of the voltage reduction unit is connected with the output end of a power supply, and the output end of the voltage reduction unit is connected with the fan end of the fan; the input end of the PMOS unit is connected with the power supply output end, and the output end of the PMOS unit is connected with the fan end of the fan; a control unit configured to: monitoring a power supply mode of the power supply, and switching a power supply path according to the conversion of the power supply mode, wherein the power supply mode comprises direct current power supply and/or alternating current power supply; when the power supply mode is alternating current power supply or direct current power supply and alternating current power supply jointly power supply, controlling a power supply path of the power supply to output to the fan end through the voltage reduction unit; and under the condition that the power supply mode is direct current power supply, continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be output to the fan end through the voltage reduction unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage.
According to a second aspect of the present application, there is provided a fan power supply method of an intelligent device, the fan power supply method including: monitoring a power supply mode of a power supply, and switching a power supply path according to the conversion of the power supply mode, wherein the power supply mode comprises direct current power supply and/or alternating current power supply; when the power supply mode is alternating current power supply or direct current power supply and alternating current power supply jointly supply, a power supply path of the power supply is controlled to be output to a fan end through a voltage reduction unit; and under the condition that the power supply mode is direct current power supply, continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be output to the fan end through the voltage reduction unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage.
According to a third aspect of the present application, there is provided a fan power supply apparatus for an intelligent device, including a processor and a memory for storing instructions executable by the processor; the processor is configured to implement the fan power supply method of the intelligent device according to the embodiments of the present application when executing the instructions.
According to a fourth aspect of the present application, there is provided a computer readable storage medium storing a computer program, which when executed by a processor, causes the processor to perform the fan power supply method of the smart device according to the various embodiments of the present application.
Compared with the prior art, the embodiment of the application has the beneficial effects that:
the fan power supply device provided by the embodiment of the application comprises a voltage reduction unit and a PMOS unit, wherein the power supply mode of a power supply is monitored through a control unit, and the opening and closing of a power supply path are controlled. The control unit switches the power supply path according to the change of the power supply mode, and the power supply path is switched to the power supply path through the PMOS unit not only through the step-down unit but also according to the change of the magnitude of the input voltage of the power supply. When the current of the fan power supply device passes through the power supply path of the PMOS unit, the problems of low noise and low working efficiency are avoided, and the service life of the fan power supply device is prolonged.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
In the drawings, which are not necessarily drawn to scale, like numerals may describe similar components in different views. Like reference numerals with letter suffixes or different letter suffixes may represent different examples of similar components. The drawings illustrate generally, by way of example, and not by way of limitation, various embodiments, and together with the description and claims serve to explain the disclosed embodiments. Such embodiments are illustrative and exemplary, and are not intended to be exhaustive or exclusive examples of the present apparatus or non-transitory computer readable medium having instructions for carrying out the steps performed by the processor of embodiments of the application.
Fig. 1 shows a schematic structural diagram of a fan power supply device according to an embodiment of the application.
Fig. 2 shows a flow chart of switching different power supply paths according to an embodiment of the application.
Fig. 3 shows a flowchart of switching a Buck circuit between PFM mode and PWM mode according to an embodiment of the present application.
Fig. 4 shows a flowchart of a fan power supply method of a smart device according to an embodiment of the present application.
Detailed Description
The present application will be described in detail below with reference to the drawings and detailed description to enable those skilled in the art to better understand the technical scheme of the present application. Embodiments of the present application will be described in further detail below with reference to the drawings and specific examples, but not by way of limitation.
The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. As used herein, the word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and that no other elements are excluded from the possible coverage as well. In the present application, the arrows shown in the figures of the respective steps are merely examples of the execution sequence, and the technical solution of the present application is not limited to the execution sequence described in the embodiments, and the respective steps in the execution sequence may be performed in combination, may be performed in decomposition, and may be exchanged as long as the logical relationship of the execution contents is not affected.
All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. Devices known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.
Fig. 1 shows a schematic structural diagram of a fan power supply device according to an embodiment of the application. The fan power supply device 100 comprises a step-down unit 101, a PMOS unit 102 and a control unit 103, wherein the input end of the step-down unit 101 is connected with the output end of a power supply 105, the output end of the step-down unit 101 is connected with the fan end of a fan 104, the input end of the PMOS unit 102 is connected with the output end of the power supply 105, and the output end of the PMOS unit 102 is connected with the fan end of the fan 104. Specifically, the power supply path a and the power supply path b may be switched to each other based on the power supply path a of the step-down unit 101 formed by the step-down unit 101 and the power supply path b of the PMOS unit 102 formed by the PMOS unit 102.
The Buck unit 101 may be implemented through a Buck circuit or an LDO, and when the Buck unit 101 is used as the LDO, there are no problems of noise and low conversion efficiency.
The control unit 103 is configured to monitor a power supply mode of the power supply 105, and switch a power supply path according to a transformation of the power supply mode, wherein the power supply mode includes a direct current power supply and/or an alternating current power supply. Before the fan power supply device 100 is connected to the power supply 105, the voltage reducing unit 101 and the PMOS unit 102 are both in the off state, so that power is not supplied to the fan 104, and the fan power supply device 100 is prevented from directly providing points to the fan 104 when the power supply 105 is connected, thereby damaging the fan 104.
When the power supply mode is ac power supply or both dc power supply and ac power supply, the power supply path of the power supply 105 is controlled to output to the fan via the step-down unit 101; when the power supply mode is dc power supply, the input voltage of the power supply 105 is continuously monitored, and the power supply path of the power supply 105 is controlled to output to the fan terminal via the step-down unit 101 or the PMOS unit 102 according to the magnitude relation between the input voltage of the power supply 105 and the first threshold voltage. Specifically, after the fan power supply apparatus 100 is connected to the power supply 105, the control unit 103 monitors the power supply mode of the power supply 105. For example, when the user presses the start key of the notebook computer, the control unit 103 monitors that the power supply mode of the power supply 105 is dc power supply, at this time, the control unit 103 continues to monitor the input voltage of the power supply 105, determines the relationship between the input voltage and the first threshold voltage, and switches the power supply path according to the comparison result. For another example, if the user inserts an external power source to charge the notebook computer, at this time, the control unit 103 monitors that there is ac power in the power supply mode, and controls the power supply path to switch to the power supply path a, that is, power is supplied via the step-down unit 101.
Wherein, the control unit 103 can control the on and off of the voltage-decreasing unit 101, the PMOS unit 102 by controlling the voltage of the pwr_en106 and the voltage of the pmos_en107, respectively, so as to realize switching between the power supply path a and the power supply path b. For example, when the control unit 103 detects that there is ac power supply in the power supply system (including a case where only ac power supply or both dc power supply and ac power supply are supplied), it is necessary to switch the power supply path to the power supply path a via the step-down unit 101, and at this time, the control unit 103 increases the voltage of the pwr_en106 and decreases the voltage of the pmos_en107, thereby closing the power supply path b and opening the power supply path a.
Of course, if the control unit 103 detects that the power supply mode does not have ac power supply, and the input voltage of the power supply 105 is less than or equal to the first threshold voltage, at this time, the control unit 103 decreases the voltage of the pwr_en106, increases the voltage of the pmos_en107, and switches the power supply path from the power supply path a to the power supply path b.
As such, the fan power supply apparatus 100 of this embodiment includes the step-down unit 101 and the PMOS unit 102, and controls switching of the power supply path by the control unit 103, instead of merely passing through the power supply path via the step-down unit 101, the fan 104 may be supplied with power via the power supply path of the PMOS unit 102 in the case where the input voltage of the power supply 105 satisfies the preset condition. When the power supply path is output to the fan 104 via the PMOS unit 102, noise is not generated, the conversion efficiency is not low, and the service life of the fan power supply device 100 is also improved.
In some embodiments of the present application, according to the magnitude relation between the input voltage of the power supply 105 and the first threshold voltage, controlling the power supply path of the power supply 105 to be output to the fan terminal of the fan 104 via the step-down unit 101 or the PMOS unit 102 specifically includes controlling the power supply path of the power supply 105 to be output to the fan terminal via the step-down unit 101 when the input voltage is greater than the first threshold voltage; in the case that the input voltage is less than or equal to the first threshold voltage, the power supply path of the power supply 105 is controlled to output to the fan terminal via the PMOS unit 102. Specifically, as shown in fig. 2, after the fan power supply device 100 is connected to the power supply 105 (step 201), step 202 is executed to determine whether the power supply mode is dc power supply, if yes, it is indicated that the battery is powered, step 203 may be continuously executed, the control unit 103 continuously reads the input voltage of the power supply 105, and further step 204 is executed to determine whether the input voltage of the power supply 105 is greater than the first threshold voltage, if yes, step 210 is executed, and the current is output via the step-down unit 101. If the result of the execution of step 202 is no, step 205 is executed, and the current is output via the step-down unit 101. Then, it is further determined whether the dc power supply is canceled (step 206), and if the result of step 206 is yes, it is indicated that the power supply mode is only dc power supply, so that step 203 is executed to continue to monitor the magnitude of the input voltage of the power supply 105. If the result of the step 204 is no, the input voltage of the power supply 105 is less than or equal to the first threshold voltage, step 207 is performed, the current is output via the PMOS unit 102, step 208 is performed, the control unit 103 continues to monitor the power supply mode and determines whether the ac power supply is connected (step 209), and if it is monitored that the ac power supply is connected, step 210 is performed, the current is output via the step-down unit 101.
In this embodiment, the first threshold voltage is not specifically limited, and may be a default value of the fan power supply apparatus 100 or a value set by the user. For example, the first threshold voltage may be 15V, and if one value of the 20ms continuous sampling values is higher than 15V, the input voltage may be considered to be higher than 15V, at this time, the control unit 103 controls the voltage of pwr_en106 to be High, and the voltage of pmos_en107 to be Low, and the fan 104 supplies power via the step-down unit 101; if the input voltage is less than or equal to 15V, the control unit 103 controls the voltage of pwr_en106 to Low and the voltage of pmos_en107 to High, and the fan 104 supplies power via the PMOS unit 102.
In this way, the control unit 103 is utilized to forcedly regulate and control the power supply paths, so that the switching of different power supply paths is timely, compared with the control of the power supply paths by software, the real-time performance is high, and the problem of burning out the fan 104 is avoided.
In some embodiments of the present application, the control unit 103 is further configured to control, in a case where the power supply path of the power supply 105 is output to the fan end of the fan 104 via the PMOS unit 102, that the power supply path of the power supply 105 is switched to be output to the fan end via the step-down unit 101 on condition that the detected power supply mode is changed from direct current power supply to direct current power supply and alternating current power supply together, that the detected power supply mode is changed from direct current power supply to alternating current power supply, and that the detected input voltage is greater than any one of the first threshold voltage. For example, when the external charger is not inserted during the use of the notebook computer, the power supply mode is only direct current power supply, and at this time, the power supply path is the case of supplying power to the fan 104 via the PMOS unit 102. If the user is connected to the external charger, the battery and the ac power supply of the notebook computer supply power to the notebook computer together, and at this time, the control unit 103 switches the power supply path from the PMOS unit 102 to the step-down unit 101 for outputting to the fan 104. Of course, if the user still does not access the external charger, and the control unit 103 monitors that the input voltage of the battery is greater than the first threshold voltage, the power supply path is also switched to the power supply path via the step-down unit 101.
In some embodiments of the present application, the control unit 103 is further configured to, before switching the power supply path of the power supply 105 to pass through the step-down unit 101, forcibly turn off the power supply path through the PMOS unit 102 to determine whether to turn off the power supply path through the PMOS unit 102 before the power supply mode is converted to the direct current power supply and the alternating current power supply together or the input voltage is raised to the first threshold voltage. Specifically, the control unit 103 forcibly turns off the power supply path via the PMOS unit 102, for example, forcibly reduces the voltage of the pmos_en107 to turn off the direct supply path before switching the power supply path via the PMOS unit 102 to the power supply path via the step-down unit 101, so as to avoid the excessive voltage from entering the fan 104 and damaging the fan 104.
In some embodiments of the present application, the control unit 103 is further configured to, in a case where the power supply is dc power supply and the power supply path of the power supply 105 is output to the fan end of the fan 104 via the step-down unit 101: continuing to monitor the input voltage of the power supply 105, and if the input voltage is less than or equal to the first threshold voltage, controlling the power supply path of the power supply 105 to switch to output to the fan terminal via the PMOS unit 102. That is, the control unit 103 continuously monitors the input voltage of the power supply 105, and switches the power supply path from the power supply path through the step-down unit 101 to the power supply path through the PMOS unit 102 once the input voltage is less than or equal to the first threshold voltage, so that noise of the fan power supply device 100 is avoided during operation, and the service life of the fan power supply device 100 can be effectively prolonged.
In some embodiments of the application, the control unit 103 is further configured to: before switching the power supply path of the power supply 105 to the power supply path through the PMOS unit 102, the power supply path through the PMOS unit 102 is turned on, and then the power supply path through the step-down unit 101 is turned off. Specifically, before switching the power supply path to the power supply path through the PMOS unit 102, the voltage of the pmos_en107 is raised to turn on the power supply path through the PMOS unit 102, and then the voltage of the pwr_en106 is lowered to turn off the power supply path through the step-down unit 101, so that the fan can be prevented from powering down when the power supply path is switched.
In some embodiments of the present application, the control unit 103 is further configured to monitor a voltage difference between the input terminal and the output terminal of the Buck unit 101 when the Buck unit 101 is a Buck circuit, and control the Buck circuit to operate in the PFM mode or the PWM mode according to a magnitude relation between the voltage difference and the second threshold voltage. In this way, the Buck circuit can switch between the PFM mode and the PWM mode, and compared with the existing PWM mode, the conversion efficiency of the fan 104 can be improved while eliminating noise. When the current of the fan 104 is small, the buck unit 101 may be an LDO, and the conversion efficiency of the fan 104 is high and the cost is low. When the step-down unit 101 is a Buck circuit, the switching of the operation modes is performed after the comprehensive judgment according to the input voltage, so that the conversion efficiency of the fan 104 and the noise generation avoidance can be both achieved.
In some embodiments of the present application, the control unit 103 is further configured to control the Buck circuit to operate in the PFM mode if the voltage difference is smaller than the second threshold voltage. As shown in fig. 3, in step 301, the current is output through the step-down unit 101, and the step-down unit 101 is a Buck circuit, if the voltage difference of the step-down unit 101 is smaller than the second threshold voltage (step 302), if the voltage difference is smaller (for example, the voltage difference is only 4V), the operating frequency exceeds 20KHz even in the PFM mode, no noise can be heard by the human ear, and the conversion efficiency of the fan 104 in the mode is higher, step 303 is executed to control the Buck circuit to operate in the PFM mode.
In some embodiments of the present application, the control unit 103 is further configured to continue to monitor the rotational speed of the fan 104 if the voltage difference is greater than or equal to the second threshold voltage; controlling the Buck circuit to work in a PFM mode under the condition that the rotating speed is larger than a threshold rotating speed; and controlling the Buck circuit to work in a PWM mode under the condition that the rotating speed is smaller than or equal to a threshold rotating speed. Referring to fig. 3, if the determination result of step 302 is no, step 304 is executed, and the control unit 103 continues to monitor the rotation speed of the fan 104, and determines whether the rotation speed is greater than the threshold rotation speed (step 305), if yes, the Buck circuit is controlled to operate in the PFM mode (step 307), and if no, the Buck circuit is controlled to operate in the PWM mode (step 306). That is, when the voltage difference of the Buck circuit is large, the rotation speed of the fan 104 is less than or equal to the threshold rotation speed, if the Buck circuit works in the PFM mode, the working frequency may fall within 20KHz, and noise is generated at this time, so that the control of the Buck circuit to work in the PWM mode can avoid the noise. When the rotation speed of the fan 104 is greater than the threshold rotation speed, that is, the load of the fan 104 is greater, the operating frequency will not fall within 20KHz even if the Buck circuit is operated in the PFM mode, so that no noise will be generated, and the Buck circuit is operated in the PFM mode, so that the fan 104 has higher conversion efficiency. In this way, the voltage difference and the rotation speed of the fan 104 are comprehensively considered to switch the operation mode of the Buck circuit, so that noise can be avoided, and the conversion efficiency is high.
Specifically, the threshold rotation speed is not specifically limited, and the value of the threshold rotation speed may be set by the user according to the model of the fan 104 or other related factors. For example, the threshold rotational speed may be 2300rpm.
In some embodiments of the present application, as shown in fig. 4, a method for supplying power to a fan of an intelligent device is provided, in step 401, a power supply mode of a power supply is monitored, and a power supply path is switched according to a transformation of the power supply mode, where the power supply mode includes a direct current power supply and/or an alternating current power supply. In step 402, when the power supply mode is ac power supply or the combination of dc power supply and ac power supply, the power supply path of the power supply is controlled to be output to the fan via the step-down unit. In step 403, when the power supply mode is dc power supply, the input voltage of the power supply is continuously monitored, and the power supply path of the power supply is controlled to output to the fan terminal via the step-down unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage. When the current of the fan power supply device passes through the power supply path of the PMOS unit, the problems of low noise and low working efficiency are avoided, and the service life of the fan power supply device is prolonged.
In some embodiments of the present application, a fan power supply apparatus for a smart device is provided, including a processor and a memory for storing instructions executable by the processor; the processor is configured to implement the fan power supply method of the intelligent device according to the embodiments of the present application when executing the instructions.
Wherein the processor may be a processing device including one or more general purpose processing devices, such as a microprocessor, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), or the like. More specifically, the processor may be a Complex Instruction Set Computing (CISC) microprocessor, a Reduced Instruction Set Computing (RISC) microprocessor, a Very Long Instruction Word (VLIW) microprocessor, a processor running other instruction sets, or a processor running a combination of instruction sets. The processor may also be one or more special purpose processing devices such as an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), a system on a chip (SoC), or the like.
The present application describes various operations or functions that may be implemented or defined as software code or instructions. Such content may be source code or differential code ("delta" or "patch" code) ("object" or "executable" form) that may be executed directly. The software code or instructions may be stored in a computer readable storage medium and, when executed, may cause a machine to perform the functions or operations described and include any mechanism that stores information in a form accessible by a machine (e.g., computing device, electronic system, etc.), such as recordable or non-recordable media (e.g., read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media, optical storage media, flash memory devices, etc.).
The exemplary methods described herein may be implemented, at least in part, by a machine or computer.
In some embodiments, a computer readable storage medium is provided, where the computer readable storage medium stores a computer program, where the computer program when executed by a processor causes the processor to perform the method for powering a fan of a smart device according to the embodiments of the present application, where the processing procedure and steps of each embodiment may be combined separately or in combination, and are not described herein.
The above-described processes performed by the processor may be implemented using software code, including, for example, microcode, assembly language code, higher-level language code, or the like. Various software programming techniques may be used to create various programs or program modules. For example, program portions or program modules may be designed in or with the aid of Java, python, C, C ++, assembly language, or any known programming language. One or more of such software portions or modules may be integrated into a computer system and/or computer readable medium. Such software code may include computer readable instructions for performing various methods. The software code may form part of a computer program product or a computer program module. Furthermore, in examples, the software code may be tangibly stored on one or more volatile, non-transitory, or non-volatile tangible computer-readable media, such as during execution or at other times. Examples of such tangible computer-readable media may include, but are not limited to, hard disks, removable magnetic disks, removable optical disks (e.g., optical disks and digital video disks), magnetic cassettes, memory cards or sticks, random Access Memories (RAMs), read Only Memories (ROMs), and the like.
Furthermore, although exemplary embodiments have been described herein, the scope thereof includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of the various embodiments across), adaptations or alterations as pertains to the present application. The elements in the claims are to be construed broadly based on the language employed in the claims and are not limited to examples described in the present specification or during the practice of the application, which examples are to be construed as non-exclusive. It is intended, therefore, that the specification and examples be considered as exemplary only, with a true scope and spirit being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the above detailed description, various features may be grouped together to streamline the application. This is not to be interpreted as an intention that the disclosed features not being claimed are essential to any claim. Rather, inventive subject matter may lie in less than all features of a particular disclosed embodiment. Thus, the claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the application should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this application will occur to those skilled in the art, and are intended to be within the spirit and scope of the application.
Claims (12)
1. A fan power supply apparatus of an intelligent device, the fan power supply apparatus comprising:
the input end of the voltage reducing unit is connected with the power supply output end, and the output end of the voltage reducing unit is connected with the fan end of the fan;
the input end of the PMOS unit is connected with the power supply output end, and the output end of the PMOS unit is connected with the fan end of the fan;
a control unit configured to: monitoring a power supply mode of the power supply, and switching a power supply path according to the conversion of the power supply mode, wherein the power supply mode comprises direct current power supply and/or alternating current power supply;
when the power supply mode is alternating current power supply or direct current power supply and alternating current power supply jointly power supply, controlling a power supply path of the power supply to output to the fan end through the voltage reduction unit; and under the condition that the power supply mode is direct current power supply, continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be output to the fan end through the voltage reduction unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage.
2. The fan power supply apparatus according to claim 1, wherein controlling the power supply path of the power supply to be output to the fan terminal via the step-down unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage specifically comprises:
controlling a power supply path of the power supply to be output to the fan end through the voltage reduction unit under the condition that the input voltage is larger than the first threshold voltage;
and controlling a power supply path of the power supply to output to the fan end through the PMOS unit under the condition that the input voltage is smaller than or equal to the first threshold voltage.
3. The fan power supply apparatus of claim 2, wherein the control unit is further configured to:
in the case that the power supply path of the power supply is output to the fan end of the fan via the PMOS unit:
the condition for controlling the power supply path of the power supply to be switched to be output to the fan end through the voltage reduction unit is any one of the following conditions:
the monitoring power supply mode is converted from direct current power supply to direct current power supply and alternating current power supply to jointly supply power;
the monitoring power supply mode is converted from direct current power supply to alternating current power supply;
the input voltage is monitored to be greater than a first threshold voltage.
4. A fan power supply as claimed in claim 3, wherein the control unit is further configured to:
before switching the power supply path of the power supply to be via the step-down unit, the power supply path via the PMOS unit is forcibly turned off to determine whether the power supply path via the PMOS unit is turned off before the power supply mode is changed to the direct current power supply and the alternating current power supply together or the input voltage is raised to the first threshold voltage.
5. The fan power supply apparatus of claim 1, wherein the control unit is further configured to:
when the power supply mode is direct current power supply and the power supply path of the power supply is output to the fan end of the fan through the voltage reduction unit:
and continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be switched to be output to the fan end through the PMOS unit if the input voltage is smaller than or equal to the first threshold voltage.
6. The fan power supply apparatus of claim 5, wherein the control unit is further configured to: before switching the power supply path of the power supply to the power supply path through the PMOS unit, the power supply path through the PMOS unit is started, and then the power supply path through the voltage reduction unit is closed.
7. The fan power supply apparatus of claim 1, wherein the control unit is further configured to: and under the condition that the Buck unit is a Buck circuit, monitoring the voltage difference between the input end and the output end of the Buck unit, and controlling the Buck circuit to work in a PFM mode or a PWM mode according to the magnitude relation between the voltage difference and the second threshold voltage.
8. The fan power supply apparatus of claim 7, wherein the control unit is further configured to: and under the condition that the voltage difference is smaller than the second threshold voltage, controlling the Buck circuit to work in a PFM mode.
9. The fan power supply apparatus of claim 8, wherein the control unit is further configured to: continuing to monitor the rotation speed of the fan under the condition that the voltage difference is greater than or equal to the second threshold voltage;
controlling the Buck circuit to work in a PFM mode under the condition that the rotating speed is larger than a threshold rotating speed;
and controlling the Buck circuit to work in a PWM mode under the condition that the rotating speed is smaller than or equal to a threshold rotating speed.
10. The fan power supply method of the intelligent equipment is characterized by comprising the following steps of:
monitoring a power supply mode of a power supply, and switching a power supply path according to the conversion of the power supply mode, wherein the power supply mode comprises direct current power supply and/or alternating current power supply;
when the power supply mode is alternating current power supply or direct current power supply and alternating current power supply jointly supply, a power supply path of the power supply is controlled to be output to a fan end through a voltage reduction unit;
and under the condition that the power supply mode is direct current power supply, continuously monitoring the input voltage of the power supply, and controlling the power supply path of the power supply to be output to the fan end through the voltage reduction unit or the PMOS unit according to the magnitude relation between the input voltage of the power supply and the first threshold voltage.
11. A fan power supply device of an intelligent device, comprising a processor and a memory for storing instructions executable by the processor; wherein the processor is configured to implement the method of powering a fan of a smart device of claim 10 when executing the instructions.
12. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed by a processor, causes the processor to perform the fan powering method of a smart device as claimed in claim 10.
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| CN202311027917.6A CN116755539B (en) | 2023-08-16 | 2023-08-16 | Fan power supply device, fan power supply method and storage medium of intelligent equipment |
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| CN116755539A (en) | 2023-09-15 |
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