Fan motor for wireless charging

Abstract

The embodiment of the present application discloses an electronic device. The electronic device includes: a housing for accommodating electronic devices and a fan running in the housing. The fan includes a motor for driving fan blades and generating an electromagnetic charging field. The motor provides the electromagnetic charging field to an open area outside the housing. The open area includes a charging pad. The present application at least solves the problem in the prior art that it is impossible to add a wireless charging function to a small and thin personal computer.

Description

Technical Field

[0001] The present application relates to a charging device, and in particular to a fan motor for wireless charging. Background Art

[0002] Small, thin PCs have little room to spare for additional components. While close-range wireless charging is a popular feature, such small, thin PCs lack the space for any wireless charging circuitry. Summary of the invention

[0003] The embodiments of the present application disclose a device, method, system and program product for technical management of hardware components of a device during assembly. The technical problem to be solved by the embodiments of the present disclosure is to add a wireless charging function to a small and thin personal computer. The embodiments of the present disclosure utilize a motor that drives a fan for cooling electronic devices to generate an electromagnetic charging field, thereby realizing the wireless charging function.

[0004] In a first aspect, an embodiment of the present application provides an electronic device. The electronic device includes a housing for accommodating electronic devices and a fan running in the housing. The fan includes a motor that drives fan blades and generates an electromagnetic charging field. The motor provides the electromagnetic charging field to an open area outside the housing. The open area includes a charging pad.

[0005] In some embodiments, the electronic device further comprises a series of magnets arranged circumferentially around the stator of the motor to generate the electromagnetic charging field.

[0006] In some embodiments, the electronic device further comprises a controller for controlling the speed of the motor to generate the electromagnetic charging field.

[0007] In some embodiments, the controller controls the motor to operate in a cooling mode or a charging mode.

[0008] In some embodiments, the frequency of the cooling mode is approximately 5 KHz, and the frequency of the electromagnetic charging field is greater than 80 KHz.

[0009] In some embodiments, the frequency of the electromagnetic charging field is between 80 and 300 KHz.

[0010] In some embodiments, the electronic device further comprises a phase-locked loop electronic circuit for controlling the frequency of the electromagnetic charging field.

[0011] In some embodiments, the electronic device further comprises an induction iron plate arranged around the motor coil winding to generate charging resonance with the device being charged.

[0012] In some embodiments, the electronic device further includes a detection board for detecting a device to be charged.

[0013] In some embodiments, the motor includes coil windings having an increasing number of windings to generate the electromagnetic charging field.

[0014] In some embodiments, the electronic device further comprises a backscatter modulation detector located at the bottom of the motor. In a second aspect, an embodiment of the present application provides a method, the method comprising the following operations: using a cooling fan motor disposed in an electronic device to generate an electromagnetic charging field, the electromagnetic charging field corresponding to a charging area on a surface of a housing of the electronic device, the housing accommodating an electronic device of the electronic device; and driving a fan connected to the cooling fan motor to cool the electronic device.

[0015] In some embodiments, the method further comprises controlling the cooling fan motor to operate in a first mode with a low frequency or a second mode with a higher frequency, wherein the first mode is used to drive the fan and the second mode is used to generate the electromagnetic charging field.

[0016] In some embodiments, the low frequency of the first mode is approximately 5 KHz and the higher frequency of the second mode is greater than 80 KHz.

[0017] In some embodiments, the electromagnetic charging field is generated by a series of magnets arranged circumferentially around a stator of a cooling fan motor.

[0018] In some embodiments, the electromagnetic charging field is directed to the charging area via an induction plate located around the cooling fan motor.

[0019] In some embodiments, the method further comprises detecting the presence of a battery-powered device to be charged on a charging area before generating the electromagnetic charging field.

[0020] In a third aspect, an embodiment of the present application provides a device. The device includes a processor and a memory device coupled to the processor and storing a program. The program can be executed by the processor to enable the processor to perform the following operations: generate an electromagnetic charging field using a cooling fan motor disposed in an electronic device, the electromagnetic charging field corresponding to a charging area on a surface of a housing of the electronic device, the housing accommodating an electronic device of the electronic device; and drive a fan connected to the cooling fan motor to cool the electronic device.

[0021] In some embodiments, the operation further comprises controlling the cooling fan motor to operate in a first mode of low frequency or a second mode of higher frequency, wherein the first mode is used to drive the cooling fan motor and the second mode is used to generate the electromagnetic charging field.

[0022] In some embodiments, the low frequency of the first mode is approximately 5 KHz and the higher frequency of the second mode is greater than 80 KHz.

[0023] In an embodiment of the present disclosure, an electronic device is provided, which at least solves the problem in the prior art that a wireless charging function cannot be added to a small and thin personal computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A block diagram of a personal computer with a combined wireless charging pad and a fan motor provided in accordance with an embodiment of the present application.

[0026] Figure 2 An embodiment of the present application provides Figure 1 Block diagram of the combined wireless charging pad and fan motor in FIG.

[0027] Figure 3 A top view block diagram of a fan motor with an additional magnet for generating a charging electromagnetic field provided in accordance with an embodiment of the present application.

[0028] Figure 4 A schematic flow chart of a method for cooling an electronic device and generating a charging field by using a cooling fan motor provided in one embodiment of the present application.

[0029] Figure 5 A block diagram of a computer system for implementing one or more example embodiments. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0032] As will be appreciated by those skilled in the art, embodiments of the present application may be embodied as systems, methods or program products. Therefore, embodiments may take the form of complete hardware embodiments, complete software embodiments (including firmware, resident software, microcode, etc.) or embodiments of software and hardware combinations, which are generally referred to herein as "circuits", "modules" or "systems". In addition, embodiments may also take the form of program products in one or more computer-readable storage devices, which store machine-readable code, computer-readable code and / or program code, hereinafter referred to as code. Storage devices may be tangible, non-temporary and / or non-transmitting. Storage devices may not contain signals. In a particular embodiment, the storage device uses only signals for accessing the code.

[0033] Many functional units described in this specification are labeled as modules to emphasize their implementation independence. For example, a module can be a hardware circuit, including a custom very-large-scale integration (VLSI) or gate array, an off-the-shelf semiconductor component (such as a logic chip, transistor, or other discrete component). A module can also be implemented in a programmable hardware device, such as a field programmable gate array (FPGA), programmable array logic (PAL), programmable logic array (PLD), etc.

[0034] Module can also be code and / or software for various types of processors to execute, so module can also be called code module.For example, the code module can include the physical or logical block of one or more executable codes.The physical or logical block can be organized as an object, a process or a function.However, the executable file of the code module does not need to be physically placed together, but can include different instructions stored in different locations, and when these instructions are combined together logically, the code module is constituted and the predetermined purpose of the code module is realized.

[0035] The code module can be a single instruction or multiple instructions and can even be distributed over multiple different code segments, between various programs, and across multiple storage devices. Similarly, operational data can be identified and described within the module and can be embodied in any suitable form and organized in any suitable data structure type. The operational data can be collected as a single data set or distributed in different locations, including other computer-readable storage devices. In the case of implementing a module or a portion of a module in software, the software portion is stored on one or more computer-readable storage devices.

[0036] The code module may use any combination of one or more computer readable media. The computer readable medium may be a computer readable storage medium. The computer readable storage medium may be a storage device storing the code. The storage device may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical or semiconductor system, device or apparatus, or any suitable combination of the foregoing.

[0037] More specific embodiments of storage devices (a non-exhaustive list) may include the following: an electrical connection with one or more wires, a portable computer floppy disk, a hard disk, a random-access memory (RAM), a read-only memory (ROM), an (electronically) erasable programmable read-only memory (EPROM, electrically erasable programmable read-only memory, EEPROM and / or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this specification, a computer-readable storage medium may be any tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or device.

[0038] The code for performing the operations of the various embodiments may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Python, Ruby, Java, Smalltalk, C++, and the like, as well as traditional procedural languages ​​such as the "C" programming language, and / or machine languages ​​such as assembly languages. The code may be executed entirely on the user's computer, partially on the user's computer as a stand-alone software package, partially on the user's computer, partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., by using a network service provider's network).

[0039] References to "one embodiment," "embodiment," or similar language throughout the specification mean that a particular feature, structure, or function described in conjunction with the embodiment is included in at least one embodiment. Therefore, the phrases "in one embodiment," "in an embodiment," and similar language that appear throughout the specification may, but do not necessarily, refer to the same embodiment, unless otherwise expressly stated to mean "one or more but not all embodiments." Unless otherwise expressly stated, the terms "include," "comprises," "has," and variations thereof mean "including but not limited to." Unless otherwise expressly stated, a list of enumerated items does not mean that any or all items are mutually exclusive. Unless otherwise expressly stated, the terms "one," "a," and "the" also mean "one or more."

[0040] In addition, the described functions, structures or characteristics of the embodiments may be combined in any suitable manner. The following description provides many specific details, such as programming embodiments, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of the embodiments. However, those skilled in the relevant art will recognize that these embodiments may be practiced without one or more specific details or using other methods, components, materials, etc. In other cases, well-known structures, materials or operations are not shown or described in detail to avoid blurring the understanding of the embodiments.

[0041] The following describes these embodiments with reference to the schematic flow charts and / or schematic structural block diagrams of the methods, devices, systems, and program products according to the embodiments. Each block of the schematic flow chart and / or schematic structural block diagram, as well as the combination of blocks in the schematic flow chart and / or schematic structural block diagram, can be implemented by code. The code can be provided to a processor of a general-purpose computer, a mobile phone, a special-purpose computer, or other programmable data processing device to generate a machine device, so that the instructions are executed by the processor of the computer or other programmable data processing device to create a device for implementing the functions / actions specified in the schematic flow chart and / or schematic structural block diagram blocks.

[0042] The code may also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other device to operate in a specific manner so that the instructions stored in the storage device produce a product that executes the functions / actions specified in the schematic flowchart and / or schematic structure block diagram blocks.

[0043] The code may also be loaded onto a computer, other programmable data processing apparatus, or other device to be executed on the computer, other programmable machine, or other device through a series of operational steps to produce a computer-implemented process, so that the code executed on the computer or other programmable device provides a process for implementing the functions / actions specified in the schematic flowchart and / or schematic structure block diagram blocks or blocks.

[0044] The schematic flow charts and / or schematic structural block diagrams in the accompanying drawings illustrate possible implementation architectures, functions, and operations of devices, systems, methods, and program products according to various embodiments. In this regard, each block in the schematic flow charts and / or schematic structural block diagrams may represent a module, segment, or portion of code, including one or more executable instructions for implementing a code of a specified logical function.

[0045] It should also be noted that in certain alternative implementations, the functions annotated in the blocks may not appear in the order annotated in the figure. For example, two blocks shown in succession may be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order, depending on the functions involved. Other steps and methods are contemplated that are equivalent in function, logic, or effect to one or more blocks or portions thereof of the illustrated figures.

[0046] Although various arrow types and line types may be used in the schematic flow charts and / or schematic block diagrams, they should be understood as not limiting the scope of the corresponding embodiments. In fact, some arrows or other lines may only indicate the logical flow of the depicted embodiments. For example, an arrow may indicate a waiting or monitoring period of unspecified duration between the enumerated steps of the illustrated embodiments. Each block of the schematic block diagram and / or schematic flow chart, and the combination of blocks in the schematic block diagram and / or schematic flow chart, may be implemented by a system based on specific / dedicated hardware that performs a specified function or action or a dedicated combination of hardware and code.

[0047] The description of the elements in each figure may refer to the elements of the previous figure. In all figures, the same numerals refer to the same elements, including alternative embodiments of the same elements.

[0048] Most thin computers already contain flat variable speed exhaust fan motors. The coils in this motor produce the same alternating electric field as the wireless charging circuit. The difference is that the motor's frequency varies around 5kHz, and wireless charging operates at around 140kHz.

[0049] A small amount of physical reorganization of the motor's induction field coils exposes one side for use as a charging pad. The windings on this side are modified to emit a higher frequency electric field either through a phase locked loop or through secondary interaction of the magnetic drive field with the circumferential magnets.

[0050] Figure 1 is a block diagram of a device 100 having a combined wireless charging pad and a fan motor. Figure 1 As shown, a charging pad 110 (indicated by a dashed line) is placed below an open area 115 on the top interactive side of the device 100. In some embodiments, the device 100 may be a laptop computer and include a keyboard 120, a touchpad 125, and a display 130. Other devices with limited interior space but open areas on the surface suitable for close contact with devices that require wireless charging may also use a combined wireless charging pad and fan motor. Placing the combined wireless charging pad and fan motor near the top interactive surface may allow battery-powered devices to be charged while the device 100 is in use.

[0051] In various embodiments, the combined wireless charging pad and fan motor 110 may be less than 5 cm in diameter.

[0052] Figure 2 An embodiment of the present application provides Figure 1 In one embodiment, the portion of the combined wireless charging pad and fan motor 110 that transmits the electromagnetic field is toward the top side of the device 100 rather than toward the circuit board side, so that the electromagnetic field is emitted closer to the top side in the open area 115.

[0053] In one embodiment, the portion that emits the electromagnetic field includes coil windings 210 of a rotor or stator. The motor drives fan blades, shown at 212. Note that the fan blades are shown below the windings 210, but in further embodiments, may also be in the same plane spaced laterally around the windings. In one embodiment, the coil windings 210 are added to increase the magnetic field to be sufficient to simultaneously turn the fan motor and charge a device 215 positioned near the windings 210. Additional circumferentially arranged magnets 217 may also be added to emit higher frequency electric fields by interacting with the magnetic field generated by the windings 210.

[0054] In one embodiment, a detection plate 220 may be added on or near the housing to detect the presence of a device 215 that needs to be charged and is placed near the charging pad 110 .

[0055] In one embodiment, an inductive soft iron plate 225 may be added near the motor coil to generate charging resonance.

[0056] In one embodiment, a backscatter modulation detector 230 may be added at the bottom of the motor power circuit.

[0057] In some embodiments, the fan motor and the wireless charging pad cannot be operated at the same time. In these cases, the mode control is implemented by the power controller and the electronic circuit 235. The power controller and the electronic circuit 235 can control the fan motor and the wireless charging pad operation mode based on the trade-off between the cooling demand and the charging demand. The cooling demand takes precedence over the charging demand.

[0058] The power controller and electronic circuit 235 can also run variable speed control software 240. The variable speed control software 240 increases the motor running current and superimposes a high frequency alternating current (AC) signal on a low frequency direct current (DC) driven motor during charging to obtain a charging frequency of about 110-205 kHz for low power charging up to 5 watts and a charging frequency of about 80-300 kHz for medium power charging. In one embodiment, the power controller and electronic circuit 235 includes a phase locked loop to enable the winding 210 to transmit the desired charging frequency.

[0059] In some embodiments, the detection board 220 provides an indication to the power controller and electronic circuit 235 that the battery-powered device 215 is in the charging position. The power controller and electronic circuit 235 then enters a charging mode to increase the speed of the motor to generate an electromagnetic field of the appropriate frequency for charging the battery-powered device 215.

[0060] Figure 3 A top view block diagram of a fan motor 300 with an additional magnet 310 for generating a charging electromagnetic field provided in accordance with an embodiment of the present application. The additional magnet 310 is a series magnet arranged circumferentially around a winding 315 to generate a suitable electromagnetic field to charge a battery-powered device 215. In one embodiment, the motor 300 is a two-phase brushless motor stator 320 with a support winding.

[0061] In one embodiment, the coil is placed on the stator 320 of the motor. In another embodiment, additional magnets 310 arranged circumferentially around the winding 315 can be placed around the rotor of the motor. In another embodiment, the charging plate 110 can be placed on the back of the electronic device 100.

[0062] In one embodiment, an induction plate, such as an induction soft iron plate 325 , is added near or around the motor 300 to guide the generated charging field to the charging pad.

[0063] Figure 4A schematic flow chart of a method for cooling an electronic device and generating a charging field by a cooling fan motor provided in an embodiment of the present application. The method 400 includes generating an electromagnetic charging field (410) using a cooling fan motor disposed in the electronic device. The electromagnetic field is directed to a charging area on a housing surface of the electronic device containing an electronic circuit. The method 400 also includes driving a fan connected to the cooling fan motor to cool the electronic device (420).

[0064] In one embodiment, the cooling fan motor is controlled to operate in a first mode at a low frequency or a second mode at a higher frequency. The first mode is used to drive the fan, and the second mode is used to generate the electromagnetic charging field. The low frequency of the first mode is about 5KHz, and the higher frequency of the second mode is greater than 80KHz.

[0065] In one embodiment, the electromagnetic charging field is generated by a series of magnets arranged circumferentially around the stator of the cooling fan motor. The electromagnetic charging field can be directed to the charging area by an induction plate arranged around the cooling fan motor.

[0066] In one embodiment, the presence of a battery powered device to be charged at the charging area may be detected prior to generating the charging field.

[0067] Figure 5 A block diagram of a computer system 500 for implementing one or more example embodiments. The computer system 500 implements control actions and circuits by executing methods and algorithms according to example embodiments to control a fan motor or operate as a wireless charging device. In various embodiments, not all components need to be used.

[0068] An example computing device in the form of a computer 500 may include a processing unit 502, a memory 503, a removable storage 510, and a non-removable storage 512. Although the example computing device is illustrated and described as a computer 500, in different embodiments, the computing device may be in different forms. For example, the computing device may be a smartphone, a tablet, a smart watch, a smart storage device (SSD), or a computer that includes information about Figure 5 Other computing devices with the same or similar components shown and described. Devices such as smartphones, tablets, smart watches, etc. are generally referred to as mobile devices or user devices.

[0069] Although various data storage elements are shown as part of computer 500, storage may also include cloud-based storage accessible via a network, such as the Internet or server-based storage. Note also that the SSD may include a processor on which the parsing function may run, thereby allowing the parsed, filtered data to be transferred via an input / output (I / O) channel between the SSD and main memory.

[0070] The memory 503 may include volatile memory 514 and non-volatile memory 508. The computer 500 may include—or may have access to—a computing environment that includes—various computer-readable media, such as volatile memory 514 and non-volatile memory 508, removable memory 510, and non-removable memory 512. The memory 503 may include random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or electrically erasable programmable read-only memory (EEPROM), flash memory or other storage technology, compact disk read-only memory (CD ROM), digital versatile disk (DVD) or other optical disk storage, magnetic tape, magnetic tape, magnetic disk storage or other magnetic storage device, or any other medium capable of storing computer-readable instructions.

[0071] The computer 500 may include or may access a computing environment including an input interface 506, an output interface 504, and a communication interface 516. The output interface 504 may include a display device that may also be used as an input device, such as a touch screen. The input interface 506 may include a touch screen, a touchpad, a mouse, a keyboard, a camera, one or more device-specific buttons, one or more sensors integrated into the computer 500 or coupled to the computer 500 via a wired or wireless data connection, and other input devices. The computer may operate in a network environment using a communication connection to connect to one or more remote computers, such as a database server. The remote computer may include a personal computer (PC), a server, a router, a network PC, a peer device, or other general data flow network switch, etc. The communication connection may include a local area network (LAN), a wide area network (WAN), a cellular, Wi-Fi, Bluetooth, or other network. In one embodiment, the various components of the computer 500 are connected to a system bus 520.

[0072] Computer readable instructions stored on a computer readable medium may be executed by a processing unit 502 of a computer 500, such as a program 518. In some embodiments, the program 518 includes software for implementing one or more methods described in this specification. Hard drives, CD-ROMs, and RAM are some examples of storage devices, including non-transitory computer readable media. The computer terms computer readable medium, machine readable medium, and storage device do not include carrier waves or signals within a range that is considered too short-lived. The storage may also include network storage, such as a storage area network (SAN). The computer program 518, together with the workspace manager 522, may be used to cause the processing unit 502 to perform one or more methods or algorithms described in this specification.

[0073] The various parts in this manual are described in a progressive manner, and each part focuses on the differences from other parts. The same or similar parts between the various parts can be referenced to each other.

[0074] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be 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 present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electronic device, comprising: A housing for electronic components; a fan operating within the housing, the fan including a motor driving fan blades and generating an electromagnetic charging field, the motor providing the charging field to an open area outside the housing, the open area including a charging pad; and A phase-locked loop electronic circuit is used to control the frequency of the electromagnetic charging field.

2. The electronic device according to claim 1, characterized in that: Also included is a series of magnets arranged circumferentially around the stator of the motor to generate the electromagnetic charging field.

3. The electronic device according to claim 1, characterized in that: Also included is a controller for controlling the speed of the motor to generate the electromagnetic charging field.

4. The electronic device according to claim 3, characterized in that: The controller controls the motor to operate in a cooling mode or a charging mode.

5. The electronic device according to claim 4, characterized in that: The frequency of the cooling mode is 5 KHz, and the frequency of the electromagnetic charging field is greater than 80 KHz.

6. The electronic device according to claim 1, characterized in that: The frequency of the electromagnetic charging field is between 80 and 300 KHz.

7. The electronic device according to claim 1, characterized in that: The invention also includes an induction iron plate arranged around the motor coil winding to generate charging resonance with the device being charged.

8. The electronic device according to claim 1, characterized in that: Also included is a detection board for detecting the device to be charged.

9. The electronic device according to claim 1, characterized in that: The electric machine includes coil windings whose number of windings increases to generate the electromagnetic charging field.

10. The electronic device according to claim 1, characterized in that: Also included is a backscatter modulation detector located at the bottom of the motor.

11. A method for charging, comprising: An electromagnetic charging field is generated by a cooling fan motor disposed in the electronic device, wherein the electromagnetic charging field corresponds to a charging area on a surface of a housing of the electronic device, wherein the housing accommodates electronic components of the electronic device; driving a fan connected to the cooling fan motor to cool the electronic device; and The cooling fan motor is controlled to operate in a first mode with a low frequency or a second mode with a higher frequency, wherein the first mode is used to drive the fan and the second mode is used to generate the electromagnetic charging field.

12. The method according to claim 11, characterized in that The low frequency of the first mode is 5 KHz, and the higher frequency of the second mode is greater than 80 KHz.

13. The method according to claim 11, characterized in that The electromagnetic charging field is generated by a series of magnets arranged circumferentially around the stator of the cooling fan motor.

14. The method according to claim 11, characterized in that The electromagnetic charging field is directed to the charging area by an induction plate located around the cooling fan motor.

15. The method according to claim 11, characterized in that Also included is a method of detecting whether a battery-powered device to be charged is present in the charging area before generating the electromagnetic charging field.

16. A computing device comprising a processor and a memory device coupled to the processor and storing a program, the program being executable by the processor to cause the processor to: An electromagnetic charging field is generated by a cooling fan motor disposed in the electronic device, wherein the electromagnetic charging field is directed to a charging area on a surface of a housing of the electronic device, wherein the housing houses electronic devices of the electronic device; driving a fan connected to a cooling fan motor to cool the electronic device; and The cooling fan motor is controlled to operate in a first mode with a low frequency or a second mode with a higher frequency, wherein the first mode is used to drive the cooling fan motor and the second mode is used to generate the electromagnetic charging field.

17. The computing device according to claim 16, characterized in that The low frequency of the first mode is 5 KHz, and the higher frequency of the second mode is greater than 80 KHz.

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