CN113014084A - Control method and device and electronic equipment - Google Patents

Control method and device and electronic equipment Download PDF

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Publication number
CN113014084A
CN113014084A CN202110176977.9A CN202110176977A CN113014084A CN 113014084 A CN113014084 A CN 113014084A CN 202110176977 A CN202110176977 A CN 202110176977A CN 113014084 A CN113014084 A CN 113014084A
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China
Prior art keywords
power supply
switching frequency
voltage signal
target
frequency
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CN202110176977.9A
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Chinese (zh)
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范长明
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Priority to CN202110176977.9A priority Critical patent/CN113014084A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/1563—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators without using an external clock

Abstract

The application discloses a control method, a control device and electronic equipment, wherein the method comprises the following steps: obtaining voltage output information of the power supply, wherein the voltage output information indicates the switching frequency of a power supply output voltage signal; responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency; the switching frequency of the power supply output voltage signal is dynamically changed in a target frequency range, so that electronic equipment powered by a power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise; the first noise is less than the second noise; in an electronic apparatus which supplies power using a power supply, there is a first component which generates noise by addition of voltage changes of the power supply.

Description

Control method and device and electronic equipment
Technical Field
The present application relates to the field of computer technologies, and in particular, to a control method and apparatus, and an electronic device.
Background
Because the piezoelectric effect of the ceramic capacitor can cause obvious vibration noise in the process of using the notebook computer, and the use experience of a user is influenced.
Disclosure of Invention
In view of the above, the present application provides a control method, an apparatus and an electronic device, as follows:
a control method, comprising:
obtaining voltage output information of a power supply, wherein the voltage output information indicates the switching frequency of a voltage signal output by the power supply;
responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
In the method, preferably, the target frequency range is a frequency range obtained by performing frequency spreading processing with the target switching frequency as a center, and the target frequency range includes a plurality of frequency values, so that the switching frequency of the power supply output voltage signal dynamically changes between the plurality of frequency values in the target frequency range.
In the method, preferably, the target frequency range is a frequency range obtained by performing spreading processing on the target switching frequency as a center according to a preset spreading ratio value, so that an absolute value of a difference between a frequency maximum value in the target frequency range and the target switching frequency corresponds to the spreading ratio.
Preferably, the method for controlling the switching frequency of the power supply output voltage signal to dynamically change within the target frequency range includes:
and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a random algorithm in a target frequency range.
Preferably, the method for controlling the switching frequency of the power supply to dynamically change in the target frequency range includes:
and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a linear or nonlinear selection algorithm in a target frequency range.
In the method, it is preferable that the switching frequency of the power supply output voltage signal meeting the first control condition includes:
the switching frequency of the power supply output voltage signal is in the acoustic frequency range such that the first component generates resonant noise.
A control device, comprising:
the information acquisition unit is used for acquiring voltage output information of the power supply, wherein the voltage output information indicates the switching frequency of the power supply output voltage signal;
the frequency control unit is used for responding to that the switching frequency of the power supply output voltage signal accords with a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and controlling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
A control device comprising at least:
a controller for obtaining voltage output information of a power supply, the voltage output information indicating a switching frequency of a voltage signal output by the power supply; responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
An electronic device, comprising:
a power source;
a first component which is excited by the voltage change of the power supply to generate noise;
a processor for executing an application to implement the following functions: obtaining voltage output information of the power supply, wherein the voltage output information indicates the switching frequency of the power supply output voltage signal; responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
wherein the switching frequency of the power supply output voltage signal dynamically changes within the target frequency range so that the electronic device generates a first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency so that the electronic device generates a second noise;
the first noise is less than the second noise.
The electronic device preferably further includes:
the processor controls the triangular wave generator to output triangular waves to the power supply, so that the switching frequency of the voltage signal output by the power supply dynamically changes within a target frequency range, and the average switching frequency of the voltage signal output by the power supply within any time period is the target switching frequency.
It can be seen from the above technical solutions that, in a control method, an apparatus and an electronic device provided by the present disclosure, when a power supply is used to supply power to an electronic device including a first component excited by a voltage signal to generate noise, the voltage output information of the power supply is monitored to monitor whether a switching frequency of a voltage signal output by the power supply meets a first control condition, and when the first control condition is met, the switching frequency of the voltage signal output by the power supply is controlled to dynamically change within a target frequency range, and an average switching frequency of the voltage signal output by the power supply within any time period is a target switching frequency, so that the switching frequency of the voltage output is controlled to dynamically change within the target frequency range in which the average switching frequency is the target switching frequency, thereby reducing the noise generated by the electronic device using the power supply to supply power, and improving the influence of the noise generated on the first component on a user, therefore, the use experience of the user on the electronic equipment is obviously improved after the noise is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a control method according to an embodiment of the present application;
FIGS. 2-4 are exemplary graphs of target frequency ranges, respectively, in an embodiment of the present application;
fig. 5 is a schematic structural diagram of a control device according to a second embodiment of the present application;
fig. 6 is a schematic structural diagram of a control device according to a third embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to a fourth embodiment of the present application;
fig. 8 is another schematic structural diagram of an electronic device according to a fourth embodiment of the present application;
FIG. 9 is a circuit diagram of a notebook computer according to an embodiment of the present application;
FIG. 10 is a control diagram of the present application when the embodiment is applied to a notebook;
FIG. 11 is a noise diagram of a fixed switching frequency in a notebook;
fig. 12 is a noise diagram of the dynamic control of the switching frequency in the notebook.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to reduce noise, the method can be implemented in the following ways:
firstly, acquiring voltage output information of a power supply, wherein the voltage output information indicates relevant information of a voltage signal output by the power supply for supplying power to electronic equipment, such as parameters of switching frequency and the like of the output voltage signal, and the electronic equipment can be mobile phone pads or notebook computers and other equipment;
then, whether the switching frequency of the power output voltage signal meets a first control condition is judged, the control condition represents that the switching frequency of the power output voltage signal is in a sound frequency range enabling a first component in the electronic equipment to generate resonance noise, if the switching frequency meets the first control condition, the switching frequency of the power output voltage signal is controlled to dynamically change in a target frequency range, and the average switching frequency of the power output voltage signal in any time period is the target switching frequency
The switching frequency of the power output voltage signal is dynamically changed in a target frequency range, so that electronic equipment powered by a power supply generates first noise, the switching frequency of the power output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise, and the first noise is smaller than the second noise.
Specifically, in an electronic device that uses a power supply to supply power, there is a first component, such as a ceramic capacitor, which is excited by a voltage change of the power supply to generate noise, that is, in the present application, the switching frequency when the power supply supplies power to the electronic device is controlled to reduce the noise generated by the first component, thereby achieving effective noise reduction.
The electronic device further includes a second component, such as a Central Processing Unit (CPU) component, for sending a voltage request command, such as an svid (system V Interface description) command, to the power supply, thereby providing voltage output information to the power supply, and the power supply outputting a voltage signal to the CPU in accordance with the voltage request command from the CPU.
The noise referred to in the present application refers to a sound that is disordered and discordant in pitch and tone variation, and specifically is generated by irregular vibration of the sounding body (different from musical tones), that is, the noise is a sound generated when the sounding body vibrates irregularly; or, the noise refers to sound which should not be present in a certain environment, and can be understood as noisy and harsh sound, such as sound which prevents people from normally resting, studying and working, and sound which interferes with sound to be heard by people, and belongs to noise. The noise reduction in the present disclosure means reducing the sound intensity, sound power, and the like of the noise, so that the electronic device after noise reduction does not affect the use of the user.
The following examples illustrate the implementation in the present application:
referring to fig. 1, a flowchart of a control method provided in an embodiment of the present application is shown, where the method in this embodiment is applied to an electronic device having a power supply, such as a mobile phone, a pad, or a notebook, where the power supply is instructed by the electronic device to supply power to the electronic device, and a second component, such as a CPU component, in the electronic device may send a voltage request instruction to the power supply to notify the power supply to output a required voltage to a first component, and accordingly, the power supply responds to the instruction to supply power to the electronic device. The electronic device includes a first component, such as a ceramic capacitor, which is excited by the voltage signal to generate sound, and the ceramic capacitor vibrates due to the transmission of the voltage signal, thereby generating noise that may adversely affect a user.
The method in this embodiment may include the following steps to address the above noise problem:
step 101: and obtaining voltage output information of the power supply.
Wherein the voltage output information indicates a switching frequency of the power supply output voltage signal.
Specifically, in this embodiment, the voltage output information of the power supply can be obtained by monitoring the switching frequency of the power supply.
In this embodiment, the switching frequency of the power supply is monitored, specifically, the switching frequency of the power supply at the current time and/or within a period of time in the future is monitored, specifically, the switching frequency of the power supply refers to the switching frequency of a power converter performing DC transmission in the power supply, such as a DC/DC (direct current/direct current) power converter, which is used as a switching power supply chip, and the input electric energy is stored in a capacitor (inductor) by performing a high-frequency switching operation through a controllable switch by using the energy storage characteristics of the capacitor and the inductor, and when the switch is turned off, the electric energy is released to a load to provide energy. During this period, the frequency of the switching operation performed by the power converter is the switching frequency of the power supply, at which the first component can be excited by the voltage signal output by the power supply at the switching frequency to generate noise, and particularly when the switching frequency is reduced to below 20khz due to the standby state of the electronic device, the noise is very obvious, and it is visible that the magnitude of the switching frequency is related to the intensity of the noise, and whether the user can receive the noise at the corresponding intensity or not. In this embodiment, the switching frequency of the power supply is monitored and obtained.
Step 102: and judging whether the switching frequency of the power output voltage signal meets the first control condition, and executing the step 103 if the switching frequency of the power output voltage signal meets the first control condition.
Specifically, whether the switching frequency meets the first control condition indicates whether the noise generated by the first component is caused by the discomfort of the switching frequency, and the discomfort of the switching frequency may cause the noise generated by the first component to affect the use experience of the user. For example, if the switching frequency meets the first control condition, it indicates that the noise generated by the first component may be caused by the discomfort of the switching frequency, for example, if the switching frequency is low, step 103 is executed, and if the switching frequency does not meet the first control condition, it indicates that the noise generated by the first component may not be caused by the discomfort of the switching frequency, step 103 is not executed, but the power supply continues to determine the switching frequency according to its requirement and its own state, that is, the power supply is controlled to continue outputting the voltage signal according to the current switching frequency.
Step 103: and controlling the switching frequency of the output voltage signal of the power supply to dynamically change in a target frequency range, wherein the average switching frequency of the output voltage signal of the power supply in any time period is the target switching frequency.
The switching frequency of the power supply output voltage signal is dynamically changed in a target frequency range, so that electronic equipment powered by the power supply generates first noise, the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise, and the first noise is smaller than the second noise.
That is, in the embodiment, in the case that the switching frequency of the power output voltage signal meets the first control condition, that is, it is determined that the noise generated by the first component is caused by the discomfort of the switching frequency, the switching frequency of the control power supply is no longer fixed at a specific switching frequency, such as the target switching frequency, but the switching frequency of the power output voltage signal is controlled to dynamically change, and the dynamic change range is determined, that is, the switching frequency of the control power supply dynamically changes within the target frequency range, and the switching frequency of the power supply does not change completely irregularly during the dynamic change process within the target frequency range, but the average switching frequency corresponding to the power supply in any time period is kept as the target switching frequency.
For example, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range and controlling the average switching frequency of the power supply output voltage signal in any time period as a target switching frequency can be understood as follows: the control power supply dynamically selects a frequency in a target frequency range to be used as a switching frequency for outputting a voltage signal, and the average switching frequency formed by the dynamically selected switching frequency in any time period is fixed and is the target switching frequency. As shown in fig. 2, the target frequency range of the switching frequency of the power supply includes several frequency values a, b, c, d, etc., after the power supply is controlled to select a as the switching frequency to output the voltage signal, the power supply is controlled to select c as the switching frequency to output the voltage signal, and then the power supply is controlled to select d as the switching frequency to output the voltage signal, etc., that is, the power supply does not output the voltage signal at a fixed switching frequency, but continuously selects a different frequency value as the switching frequency to output the voltage signal in the target frequency range, but the average value of the frequency values selected by the power supply in a time period composed of any plurality of time instants is a fixed value, i.e., the frequency value of the target switching frequency. Therefore, the control scheme that the switching frequency is continuously changed and the average switching frequency is kept unchanged breaks through the vibration, such as resonance and the like, caused by the original fixed switching frequency to the first component, so that the noise is reduced, and meanwhile, the normal operation of the electronic equipment in the current state, such as the standby state, cannot be influenced.
As can be seen from the foregoing technical solutions, in a control method provided in an embodiment of the present invention, when a power supply is used to supply power to an electronic device including a first component excited by a voltage signal to generate noise, voltage output information of the power supply is monitored to monitor whether a switching frequency of the power supply output voltage signal meets a first control condition, and when the first control condition is met, the switching frequency of the power supply output voltage signal is controlled to dynamically change within a target frequency range, and an average switching frequency of the power supply outputting the voltage signal within any time period is a target switching frequency, so that the switching frequency of the voltage output is controlled to dynamically change within the target frequency range in which the average switching frequency is the target switching frequency, thereby reducing the noise generated by the electronic device supplied with power by using the power supply, and improving an influence of the noise generated on the first component on a user, therefore, the use experience of the user on the electronic equipment is obviously improved after the noise is reduced.
In one implementation, the target frequency range is a frequency range obtained by performing a frequency spreading process with a target switching frequency as a center, and thus, the target frequency range includes a plurality of frequency values therein, so that the switching frequency of the power supply output voltage signal dynamically changes among the plurality of frequency values in the target frequency range.
As shown in fig. 3, after the frequency values are expanded in two directions of increasing and decreasing by taking the target switching frequency x as a center, a target frequency range containing a plurality of frequency values is obtained, and in this embodiment, when the power supply is controlled to select a switching frequency within the target frequency range to output a voltage signal, a principle that an average value of the plurality of frequency values selected in any time period is taken as the target switching frequency is followed, so that the average switching frequency of the voltage signal output by the power supply in any time period is the target switching frequency.
Specifically, the target frequency range is a frequency range obtained by performing spread spectrum processing on the target switching frequency as a center according to a preset spread spectrum ratio value, and thus an absolute value of a difference between a frequency maximum value in the target frequency range and the target switching frequency corresponds to the spread spectrum ratio.
As shown in fig. 4, after the frequency values are expanded in two directions of increasing and decreasing according to the spreading ratio y with the target switching frequency x as the center, a target frequency range including a plurality of frequency values is obtained, wherein, when expanding towards the increasing direction, the maximum value of the frequency of the expanded target frequency range is the value obtained by increasing the product of x and y on the basis of the target switching frequency x, when expanding towards the decreasing direction, the minimum value of the expanded target frequency range is a value obtained by decreasing the product of x and y on the basis of the target switching frequency x, based on which, in this embodiment, when the power supply is controlled to select the switching frequency within the target frequency range for voltage signal output, the principle that the average value of a plurality of selected frequency values within any time period is the target switching frequency is followed, therefore, the average switching frequency of the output voltage signal of the power supply in any time period is the target switching frequency.
In one implementation, the step 103 is to control the switching frequency of the power output voltage signal to dynamically change within a target frequency range, specifically:
and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a random algorithm in a target frequency range, wherein the switching frequency of the power supply is randomly and dynamically changed in the target frequency range.
Or controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a linear or nonlinear selection algorithm in a target frequency range.
In this embodiment, the power supply is controlled to select a frequency value as a switching frequency in a target frequency range according to a linear selection algorithm for outputting a voltage signal, where the linear selection algorithm may be: sequentially selecting corresponding frequency values in the target frequency range from small to large or from large to small, wherein the difference between the selected frequency values is equal, and at this time, the switching frequency of the power supply output voltage signal is linearly increased or decreased, for example, the switching frequency is between 10Khz and 20Khz, and the switching frequency selected each time is increased or decreased by 2Khz compared with the switching frequency selected last time, for example, the switching frequency selected each time is: 10Khz, 12Khz, 14Khz, 16Khz, etc., but with an average switching frequency of 13 Khz;
or, in this embodiment, the power supply is controlled to select a frequency value as a switching frequency in a target frequency range according to a nonlinear selection algorithm to output the voltage signal, where the nonlinear selection algorithm may be: selecting corresponding frequency values in the target frequency range in order from small to large or from large to small, wherein the difference between the selected frequency values is different or the same (not the difference between the frequency values selected each time is the same, i.e. non-linear), at this time, the switching frequency of the voltage signal of the voltage output is increased or decreased non-linearly, for example, the switching frequency is between 10k and 20k, and the difference between the switching frequency selected each time and the switching frequency selected last time is different from the difference between the switching frequency selected last time, for example, the switching frequency selected each time is respectively: 10k, 11k, 15k, 16k, etc., but with an average switching frequency of 13 Khz.
That is, in this embodiment, frequency values may be randomly selected or sequentially selected as the switching frequency of the power supply according to a linear or non-linear selection algorithm in a target frequency range obtained by spreading the frequency around the target switching frequency, so as to control the power supply to output the voltage signal according to the selected switching frequency, and an average value of a plurality of frequency values selected in any time period is kept as the target switching frequency, so that the average switching frequency of the voltage signal output by the power supply in any time period is the target switching frequency.
In a specific implementation, the power supply in this embodiment may be configured with a triangular wave generator, which is configured to output a triangular wave to the power supply to implement expansion of the switching frequency of the power supply, based on which the switching frequency of the power supply output voltage signal dynamically changes within a spread target frequency range after passing through the spread spectrum of the triangular wave, and the average switching frequency of the power supply output voltage signal in any time period is the target switching frequency, for example, after the power supply is provided with the triangular wave generator for spread spectrum, a feedback line between the triangular wave generator and the power supply is used to increase the triangular wave operation with a spreading ratio value of between 10% and 15% to the switching frequency during the process of outputting the voltage signal from the power supply, so that the switching frequency of the power supply output voltage signal is not fixed at 20Khz any more, but falls on average between 18Khz and 22Khz of the phase, thus, the switching frequency of the power supply is dynamically varied between 18Khz and 22Khz, and the average switching frequency is still 20Khz, which reduces noise in the electronic device.
In one implementation manner, the switching frequency of the power output voltage signal in step 102 meets the first control condition, which may specifically be:
the switching frequency of the power supply output voltage signal is in the sound frequency range, so that the first component generates resonance noise.
The sound frequency range may be a frequency range of sound that can be received by an ear, such as a range of low frequencies from 20hz to 20Khz, and specifically may be: the human ear receives a sound frequency range that can produce resonance with the first component resulting in resonance noise. Based on this, in the present embodiment, when the switching frequency of the power output voltage signal is in the sound frequency range, the switching frequency of the power output voltage signal is controlled to dynamically change in the target frequency range, and the average switching frequency of the power output voltage signal in any time period is the target switching frequency, for example, the power output is controlled to dynamically change in 18Khz to 22Khz while the average switching frequency is maintained at 20Khz, thereby avoiding the resonance noise of the ceramic capacitor.
Referring to fig. 5, a schematic structural diagram of a control apparatus provided in the second embodiment of the present disclosure is shown, where the apparatus in the second embodiment is implemented as a functional module, and may be configured in an electronic device with a power supply, such as a mobile phone, a pad, or a notebook, where the power supply is instructed by the electronic device to supply power to the electronic device, for example, a second component in the electronic device, such as a CPU component, may send a voltage request instruction to the power supply to notify the power supply to output a required voltage to a first component, and accordingly, the power supply responds to the instruction to supply power to the electronic device. The electronic device includes a first component, such as a ceramic capacitor, which is excited by the voltage signal to generate sound, and the ceramic capacitor vibrates due to the transmission of the voltage signal, thereby generating noise that may adversely affect a user.
Specifically, the apparatus in this embodiment may include the following units to solve the above noise problem:
an information obtaining unit 501, configured to obtain voltage output information of a power supply, where the voltage output information indicates a switching frequency of a voltage signal output by the power supply;
a frequency control unit 502, configured to control a switching frequency of the power output voltage signal to dynamically change within a target frequency range in response to that the switching frequency of the power output voltage signal meets a first control condition, and an average switching frequency of an output voltage signal of the power supply within any time period is a target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
As can be seen from the above technical solutions, in a control device provided in the second embodiment of the present invention, when a power supply is used to supply power to an electronic device including a first component excited by a voltage signal to generate noise, the voltage output information of the power supply is monitored to monitor whether a switching frequency of the power supply output voltage signal meets a first control condition, and when the first control condition is met, the switching frequency of the power supply output voltage signal is controlled to dynamically change within a target frequency range, and an average switching frequency of the power supply outputting the voltage signal within any time period is a target switching frequency, so that the switching frequency for performing voltage output is controlled to dynamically change within the target frequency range in which the average switching frequency is the target switching frequency, thereby reducing the noise generated by the electronic device supplied with power by using the power supply, and improving the influence of the noise generated on the first component on a user, therefore, the use experience of the user on the electronic equipment is obviously improved after the noise is reduced.
In one implementation, the target frequency range is a frequency range obtained by performing frequency spreading processing with the target switching frequency as a center, and the target frequency range includes a plurality of frequency values, so that the switching frequency of the power supply output voltage signal dynamically changes among the plurality of frequency values in the target frequency range.
Specifically, the target frequency range is a frequency range obtained by performing spreading processing on the target switching frequency as a center according to a preset spreading ratio value, so that an absolute value of a difference between a frequency maximum value in the target frequency range and the target switching frequency corresponds to the spreading ratio.
In one implementation, the frequency control unit 502 is specifically configured to: and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a random algorithm in a target frequency range.
In one implementation, the frequency control unit 502 is specifically configured to: and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a linear or nonlinear selection algorithm in a target frequency range.
In one implementation, the switching frequency of the power supply output voltage signal meeting a first control condition includes: the switching frequency of the power supply output voltage signal is in the acoustic frequency range such that the first component generates resonant noise.
It should be noted that, for the specific implementation of each unit in the present embodiment, reference may be made to the corresponding content in the foregoing, and details are not described here.
Referring to fig. 6, a schematic structural diagram of a control apparatus provided in a third embodiment of the present disclosure is a physical structure, and the apparatus in this embodiment may be configured in an electronic device with a power supply, such as a mobile phone, a pad, or a notebook, where the power supply is instructed by the electronic device to supply power to the electronic device, for example, a second component in the electronic device, such as a CPU component, may send a voltage request instruction to the power supply to notify the power supply to output a required voltage to a first component, and accordingly, the power supply responds to the instruction to supply power to the electronic device. The electronic device includes a first component, such as a ceramic capacitor, which is excited by the voltage signal to generate sound, and the ceramic capacitor vibrates due to the transmission of the voltage signal, thereby generating noise that may adversely affect a user.
Specifically, the apparatus in this embodiment may include the following structure to solve the above noise problem:
a controller 601 for obtaining voltage output information of the power supply, the voltage output information indicating a switching frequency of the power supply output voltage signal.
The controller 601 is further configured to control the switching frequency of the power supply output voltage signal to dynamically change within a target frequency range in response to that the switching frequency of the power supply output voltage signal meets a first control condition, and an average switching frequency of the power supply output voltage signal within any time period is a target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
Specifically, the controller 601 may implement capture of the switching frequency and dynamic control of the switching frequency by an ic (integrated Circuit chip) chip of a pulse width modulation pwm (pulse width modulation) connected to the power supply or an embedded controller ec (embedded controller) in the electronic device.
As can be seen from the above technical solutions, in a control apparatus provided in the third embodiment of the present application, when a power supply is used to supply power to an electronic device including a first component that is excited by a voltage signal to generate noise, the voltage output information of the power supply is monitored to monitor whether a switching frequency of the power supply output voltage signal meets a first control condition, and when the first control condition is met, the switching frequency of the power supply output voltage signal is controlled to dynamically change within a target frequency range, and an average switching frequency of the power supply output voltage signal within any time period is a target switching frequency, so that the switching frequency that performs voltage output is controlled to dynamically change within the target frequency range in which the average switching frequency is the target switching frequency, thereby reducing the noise generated by the electronic device that uses the power supply to supply power, and improving the influence of the noise generated on the first component on a user, therefore, the use experience of the user on the electronic equipment is obviously improved after the noise is reduced.
In one implementation, the target frequency range is a frequency range obtained by performing frequency spreading processing with the target switching frequency as a center, and the target frequency range includes a plurality of frequency values, so that the switching frequency of the power supply output voltage signal dynamically changes among the plurality of frequency values in the target frequency range.
Optionally, the target frequency range is a frequency range obtained by performing spreading processing according to a preset spreading ratio value with the target switching frequency as a center, so that an absolute value of a difference between a frequency maximum value in the target frequency range and the target switching frequency corresponds to the spreading ratio.
In one implementation, the controller 601 is specifically configured to: and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a random algorithm in a target frequency range.
In one implementation, the controller 601 is specifically configured to: and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a linear or nonlinear selection algorithm in a target frequency range.
In one implementation, the switching frequency of the power supply output voltage signal meeting a first control condition includes: the switching frequency of the power supply output voltage signal is in the acoustic frequency range such that the first component generates resonant noise.
It should be noted that, for the specific implementation of each device in the present embodiment, reference may be made to the corresponding content in the foregoing, and detailed description is not provided herein
Referring to fig. 7, a schematic structural diagram of an electronic device according to a fourth embodiment of the present application is shown, where the electronic device may be a mobile phone, a pad, or a notebook.
In this embodiment, the electronic device may include the following structure:
a power supply 701 for supplying power to the electronic apparatus, and the power supply 701 has a switching frequency when outputting a voltage.
The CPU in the electronic device sends an instruction to the power source 701, and the power source 701 responds to the instruction to supply power to the electronic device. The switching frequency of the power source 701 is the switching frequency of a source converter performing DC transmission in the power source 701, such as a DC/DC (direct current/direct current) power converter, which is used as a switching power chip, and utilizes the energy storage characteristics of a capacitor and an inductor to perform a high-frequency switching operation through a controllable switch, so as to store the input electric energy in the capacitor (inductor), and when the switch is turned off, the electric energy is released to a load to provide energy.
The first component 702 is excited by a voltage to generate noise, for example, excited by a voltage signal output by the power source 701 at a switching frequency.
When the power source 701 supplies power to the electronic device, under the switching frequency of the electronic device, the first component 702 can be excited by a voltage signal output by the power source 701 under the switching frequency to generate noise, and the magnitude of the switching frequency is related to the intensity of the noise and whether a user can receive the noise under the corresponding intensity.
A processor 703 for executing an application program to implement the following functions: obtaining voltage output information of the power supply 701, wherein the voltage output information indicates the switching frequency of a voltage signal output by the power supply 701; in response to that the switching frequency of the voltage signal output by the power supply 701 meets a first control condition, controlling 701 the switching frequency of the voltage signal output by the power supply to dynamically change within a target frequency range, and taking the average switching frequency of the voltage signal output by the power supply 701 within any time period as the target switching frequency;
the switching frequency of the voltage signal output by the power source 701 dynamically changes within a target frequency range, so that the electronic device generates a first noise, the switching frequency of the voltage signal output by the power source 701 is the target switching frequency, so that the electronic device generates a second noise, and the first noise is smaller than the second noise.
It should be noted that the application program may be software or code preset in the memory, and the processor 703 includes a kernel, and the kernel calls and runs the application program in the memory to implement the corresponding function. The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
As can be seen from the foregoing technical solutions, in an electronic device provided in the fourth embodiment of the present invention, when a power supply is used to supply power to an electronic device including a first component excited by a voltage signal to generate noise, the voltage output information of the power supply is monitored to monitor whether a switching frequency of the power supply output voltage signal meets a first control condition, and when the first control condition is met, the switching frequency of the power supply output voltage signal is controlled to dynamically change within a target frequency range, and an average switching frequency of the power supply outputting the voltage signal within any time period is a target switching frequency, so that the switching frequency for performing voltage output is controlled to dynamically change within the target frequency range in which the average switching frequency is the target switching frequency, thereby reducing the noise generated by the electronic device using the power supply to supply power, and improving the influence of the noise generated on the first component on a user, therefore, the use experience of the user on the electronic equipment is obviously improved after the noise is reduced.
In an implementation manner, the electronic device in this embodiment may further include the following structure, as shown in fig. 8:
the triangular wave generator 704 is connected to the power source 701, and the processor 703 controls the triangular wave generator 704 to output the triangular wave to the power source 701, so that the switching frequency of the voltage signal output by the power source 701 dynamically changes within a target frequency range, and the average switching frequency of the voltage signal output by the power source 701 in any time period is the target switching frequency.
The following takes an electronic device as a notebook and a first component as a ceramic capacitor as an example, and exemplifies the technical solution in the present application:
according to the technical scheme, the switching frequency of the power supply under light load is adjusted through the 3V/5VPWM IC, the fixed frequency of the 3V/5V power supply of the notebook computer under the standby state is changed, the PWM period of the PWM IC is controlled between 18Khz and 22Khz, the voltage difference of two poles of a ceramic capacitor is reduced, the vibration amplitude of the ceramic capacitor is reduced, the resonance amplitude of the whole mainboard is reduced, and the sound intensity level of audio noise is greatly reduced.
Specifically, with reference to the circuit structure shown in fig. 9, the implementation principle of the technical solution of the present application is as follows:
in a light load state of the notebook computer, such as a standby state, the switching frequency of the power supply PWM IC is below 20Khz, and is in a Discontinuous Conduction Mode (DCM) Mode, and when the wake-up frequencies of the APP and the CPU in the notebook computer system are also in the same level, the noise level at the 20Khz frequency is overlapped and dispersed, and the noise is larger.
In order to solve this problem, the present application designs a "Spread spectrum technique on the PWM power supply: by adding 10% to 15% deviation jitter triangular wave operation in the circuit based on the algorithm of the feedback path, the switching frequency of the PWM IC is not fixed at 20KHZ in the standby state, but is increased or decreased, so that the switching frequency is averagely in the adjacent interval of 18Khz to 22Khz, and the noise level in the standby state can be reduced.
For example, after starting the computer system and entering the IDLE state, the APP and the CPU in the IDLE state will be in real-time loop form, the frequency falls within 20Khz, at this time, the 3V/5V PWM IC captures the CPU and APP loop form to adjust the PWM IC frequency, as shown in fig. 10, based on this, the PWM IC starts the feedback generator when the frequency falls within 20Khz, to generate a random frequency of 18Khz to 22Khz, and after the PWM IC receives the jitter frequency of the generator, the PWM IC frequency is changed while ensuring the output voltage to be stable, thereby achieving noise reduction. Based on this, the 3V/5V PWM IC will change according to the frequency change of the operating system APP and the CPU.
As shown in fig. 11, the switching frequency of the power supply is fixed in a noise state under 20KHZ, and as shown in fig. 12, the switching frequency of the power supply is spread and then averagely falls in a noise state in an adjacent interval of 18KHZ to 22 KHZ.
Based on the realization, the problem of serious audio noise of the notebook computer in standby can be greatly improved, and the power supply vibration period and frequency are changed regularly, so that the power supply output efficiency is not influenced, and the performance and the battery endurance of the notebook computer are not influenced.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended 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 (10)

1. A control method, comprising:
obtaining voltage output information of a power supply, wherein the voltage output information indicates the switching frequency of a voltage signal output by the power supply;
responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
2. The method of claim 1, wherein the target frequency range is a frequency range obtained by performing a frequency spreading process centered around the target switching frequency, and the target frequency range comprises a plurality of frequency values, such that the switching frequency of the power supply output voltage signal dynamically varies among the plurality of frequency values in the target frequency range.
3. The method according to claim 2, wherein the target frequency range is a frequency range obtained by performing spreading processing according to a preset spreading ratio value with the target switching frequency as a center, so that an absolute value of a difference between a frequency mode in the target frequency range and the target switching frequency corresponds to the spreading ratio.
4. The method of claim 1, controlling the switching frequency of the power supply output voltage signal to dynamically vary within a target frequency range, comprising:
and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a random algorithm in a target frequency range.
5. The method of claim 1, controlling the switching frequency of the power supply to dynamically vary within a target frequency range, comprising:
and controlling the switching frequency of the power supply output voltage signal to be a corresponding frequency value selected according to a linear or nonlinear selection algorithm in a target frequency range.
6. The method of claim 1, the switching frequency of the power supply output voltage signal meeting a first control condition comprising:
the switching frequency of the power supply output voltage signal is in the acoustic frequency range such that the first component generates resonant noise.
7. A control device, comprising:
the information acquisition unit is used for acquiring voltage output information of the power supply, wherein the voltage output information indicates the switching frequency of the power supply output voltage signal;
the frequency control unit is used for responding to that the switching frequency of the power supply output voltage signal accords with a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and controlling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
8. A control device comprising at least:
a controller for obtaining voltage output information of a power supply, the voltage output information indicating a switching frequency of a voltage signal output by the power supply; responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
the switching frequency of the power supply output voltage signal dynamically changes in the target frequency range, so that electronic equipment powered by the power supply generates first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency, so that the electronic equipment powered by the power supply generates second noise;
the first noise is less than the second noise;
wherein there is a first component in an electronic device that is powered using the power supply, the first component generating the noise added by a voltage change of the power supply.
9. An electronic device, comprising:
a power source;
a first component which is excited by the voltage change of the power supply to generate noise;
a processor for executing an application to implement the following functions: obtaining voltage output information of the power supply, wherein the voltage output information indicates the switching frequency of the power supply output voltage signal; responding to that the switching frequency of the power supply output voltage signal meets a first control condition, controlling the switching frequency of the power supply output voltage signal to dynamically change in a target frequency range, and enabling the average switching frequency of the power supply output voltage signal in any time period to be the target switching frequency;
wherein the switching frequency of the power supply output voltage signal dynamically changes within the target frequency range so that the electronic device generates a first noise, and the switching frequency of the power supply output voltage signal is the target switching frequency so that the electronic device generates a second noise;
the first noise is less than the second noise.
10. The electronic device of claim 9, further comprising:
the processor controls the triangular wave generator to output triangular waves to the power supply, so that the switching frequency of the voltage signal output by the power supply dynamically changes within a target frequency range, and the average switching frequency of the voltage signal output by the power supply within any time period is the target switching frequency.
CN202110176977.9A 2021-02-07 2021-02-07 Control method and device and electronic equipment Pending CN113014084A (en)

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