CN113098247A - Power supply anti-peak processing method and device and terminal - Google Patents
Power supply anti-peak processing method and device and terminal Download PDFInfo
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- CN113098247A CN113098247A CN202110352399.XA CN202110352399A CN113098247A CN 113098247 A CN113098247 A CN 113098247A CN 202110352399 A CN202110352399 A CN 202110352399A CN 113098247 A CN113098247 A CN 113098247A
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The invention is applicable to the technical field of power supply peak reversal and provides a power supply peak reversal processing method, a power supply peak reversal processing device, a terminal and a computer readable storage medium. The power supply peak reversal processing method comprises the following steps: acquiring output electrical parameters of a power supply; judging whether the output end of the power supply is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value; and if the output end of the power supply is judged to be short-circuited, controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode. The invention can effectively process the power supply peak reversal, not only can reduce the cost for processing the power supply peak reversal, but also can prolong the service life of the power supply.
Description
Technical Field
The invention belongs to the technical field of power supply peak reversal, and particularly relates to a power supply peak reversal processing method, a power supply peak reversal processing device, a terminal and a computer readable storage medium.
Background
In the application process of high-power switching power supply equipment, particularly a power supply comprising a switching device and an inductor, if a short circuit occurs, larger reverse peak voltages can be generated at two ends of the switching device during the short circuit, and if the reverse peak voltages applied to the two ends of the switching device exceed the maximum bearing capacity of the switching device, the switching device can be damaged, further the switching power supply equipment is damaged, and safety accidents can be caused.
At present, most of the modes for processing the inverse peak process the inverse peak by adding hardware, such as adding absorption resistance and absorption capacitance. However, the requirement for processing the peak reversal by adding hardware is high, and different peak reversal processing devices need to be selected for power supply equipment with different requirements, so that not only is time spent, but also the cost is increased.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, a terminal and a computer readable storage medium for power supply inverse peak processing, so as to solve the problems that the requirement for a device is high when inverse peak is processed by adding hardware in the prior art, and different inverse peak processing devices need to be selected for power supply equipment with different requirements, which not only takes time but also increases cost.
A first aspect of an embodiment of the present invention provides a power supply peak inversion processing method, including:
acquiring output electrical parameters of a power supply;
judging whether the output end of the power supply is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value;
and if the output end of the power supply is judged to be short-circuited, controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode.
A second aspect of an embodiment of the present invention provides a power supply inverse peak processing apparatus, including:
the acquisition module is used for acquiring output electrical parameters of the power supply;
the judging module is used for judging whether the power supply output end is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value;
and the control module is used for controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode if the short circuit of the output end of the power supply is judged.
A third aspect of embodiments of the present invention provides a terminal, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the power supply anti-peak processing method according to any one of the first aspect when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, which stores a computer program that, when executed by a processor, implements the steps of the power supply anti-peak processing method according to any one of the first aspect.
Compared with the prior art, the invention has the following beneficial effects: the method comprises the steps of obtaining output electrical parameters of a power supply; judging whether the output end of the power supply is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value; and if the output end of the power supply is judged to be short-circuited, controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode. Whether the power output end is short-circuited can be judged more visually and rapidly by acquiring the output electrical parameters of the power supply, the cost for processing the power supply peak reversal can be reduced, and the service life of the power supply can be prolonged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a flow chart of an implementation of a power supply anti-peak processing method according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a power supply provided by an embodiment of the invention;
fig. 3 is a schematic structural diagram of a power supply anti-peak processing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, it shows a flowchart of an implementation of a power supply anti-peak processing method provided by the embodiment of the present invention.
In some embodiments of the present invention, the power supply may include a switching device and an inductor connected in sequence, and the power supply peak inversion processing method may include:
and S101, acquiring output electrical parameters of the power supply.
Alternatively, the output electrical parameter of the power supply may be output voltage, output current, output power, output frequency, etc.
S102, judging whether the output end of the power supply is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; and judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value.
Optionally, the power supply generally adopts a Pulse Width Modulation (PWM) technology to adjust the duty ratio, when the output end of the power supply is short-circuited, the inverse peak voltage at the two ends of the switching device will gradually rise, and when the bearable capacity of the switching device is exceeded, the device may be damaged, which affects the service life of the power supply;
the embodiment of the invention judges whether the short circuit time length of the power output end is less than the exceeding time length of the inverse peak voltage at two ends of the switching device, for example, the exceeding time length of the inverse peak voltage at two ends of the switching device is 500us, and the embodiment of the invention judges the short circuit time length of the power output end is 200us, namely, the embodiment of the invention can realize short circuit quick detection and shorten the processing time of the inverse peak of the power.
And S103, if the power supply output end is judged to be short-circuited, controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode.
Optionally, in a general case, the inductive current of the power supply may operate in a continuous mode, and when the power supply output terminal is short-circuited, the inductive current may be switched to an intermittent mode, so as to prolong the time duration that the peak-to-peak voltages at two ends of the switching device exceed the standard, and when the output current of the power supply operates in the intermittent mode, the time period in which the current value is 0 exists in each switching period of the PWM regulation.
Illustratively, if the inductive current of the power supply always works in a continuous mode under the condition that the output end of the power supply is short-circuited, the exceeding time length of peak reversal voltage at two ends of the switching device is 500us, if the short circuit is identified 200us after the output end of the power supply is short-circuited, the inductive current is switched into an intermittent mode, the exceeding time length of the peak reversal voltage at two ends of the switching device is about 10s, and the exceeding time length of the peak reversal voltage is prolonged to provide more time for removing the short-circuit fault.
The method comprises the steps of obtaining output electrical parameters of a power supply; judging whether the output end of the power supply is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value; and if the output end of the power supply is judged to be short-circuited, controlling the inductive current of the power supply to be switched from the continuous mode to the discontinuous mode. Whether the power output end is short-circuited can be judged more visually and rapidly by acquiring the output electrical parameters of the power supply, the cost for processing the power supply peak reversal can be reduced, and the service life of the power supply can be prolonged.
In some embodiments of the present invention, after controlling the inductor current of the power supply to switch from the continuous mode to the discontinuous mode, the power supply anti-peak processing method may further include:
and if the fact that the output end of the power supply is recovered from the short circuit to be normal is detected before the inverse peak voltage exceeds the preset inverse peak voltage value, controlling the inductive current of the power supply to recover from the discontinuous mode to the continuous mode.
Optionally, before the peak-to-peak voltage at two ends of the switching device exceeds the standard, if the short-circuit fault at the output end of the power supply is eliminated, the inductive current of the power supply is controlled to be recovered from the discontinuous mode to the continuous mode, so that the power supply normally works, the power supply does not stop working, and the working reliability of the power supply can be improved.
In some embodiments of the present invention, the,
the output electrical parameter comprises an output voltage or an output current;
judging whether the power output end is short-circuited according to the output electrical parameter may include:
when the output electrical parameter is the output voltage:
if the output voltage is lower than the preset voltage value and the duration time of the output voltage lower than the preset voltage value is longer than a first preset time value, judging that the output end of the power supply is short-circuited; otherwise, the power supply output end is judged not to be short-circuited.
Optionally, if the output voltage is not lower than the preset voltage value, and/or the duration time that the output voltage is lower than the preset voltage value is not greater than a first preset time value, it is determined that the power output end is not short-circuited;
when the output electrical parameter is the output current:
if the output current is larger than a first preset current value and the duration of the output current larger than the first preset current value is larger than a second preset time value, judging that the output end of the power supply is short-circuited; otherwise, the power supply output end is judged not to be short-circuited.
Optionally, if the output current is not greater than the first preset current value, and/or the duration that the output current is not greater than the first preset current value is not greater than the second preset time value, it is determined that the power output terminal is not short-circuited.
Optionally, the preset voltage value, the first preset time value, the first preset current value and the second preset time value may be set according to an actual situation.
Referring to fig. 2, a schematic diagram of a power circuit provided by an embodiment of the invention is shown.
In some embodiments of the invention, the power supply further comprises a freewheeling diode D1; the input end of the switching device Q1 is connected with the positive input end of the power supply, and the output end of the switching device Q1 is respectively connected with the cathode of the freewheeling diode D1 and the first end of the inductor L1; the second end of the inductor L1 is connected with the negative output end of the power supply; the anode of the freewheeling diode D1 is respectively connected with the negative input end of the power supply and the negative output end of the power supply;
the method for controlling the inductor current of the power supply to be switched from the continuous mode to the discontinuous mode comprises the following steps:
and reducing the duty ratio of the switching device to switch the inductive current of the power supply from the continuous mode to the discontinuous mode.
Optionally, when the output end of the power supply is short-circuited, the output current is increased, the inverse peak voltage applied to the two ends of the switching device is increased, and when the inverse peak voltage exceeds the bearable voltage of the switching device, the switching device is triggered to protect under normal conditions, and the switching device stops working, namely, the power supply stops working;
if the switching device frequently triggers protection, reliability and service life of the power supply can be reduced, and if the switching device continues to work, a power supply starting process is needed, and if the switching device frequently stops working, service efficiency of the power supply can be reduced, and power supply load is increased.
The switching element can be a switching tube, the duty ratio of the switching tube is controlled through PWM, the on-off of the switching tube is realized, when the switching tube is switched on, the output current of a power supply is inductive current, when the switching tube is switched on, the output current of the power supply is current passing through a freewheeling diode, the output current of the power supply when the switching tube is switched on is smaller than that when the switching tube is switched on, therefore, the output current of the power supply can be adjusted by adjusting the duty ratio of the switching tube, the reverse peak voltage of the switching tube is reduced, the power supply can be prevented from stopping working by adjusting the duty ratio, and the service efficiency of the power supply is improved.
In some embodiments of the present invention, reducing the duty cycle of the switching device may include:
reducing the current given value of the current control loop to a second preset current value;
determining a target duty ratio according to a second preset current value and the current control loop;
the duty cycle of the switching device is adjusted to a target duty cycle.
Optionally, the current control loop is a current control loop of the inductor, and may control a current passing through the inductor, the current control loop is widely applied to an existing power supply, and a duty ratio of the switching device may be determined according to a relevant parameter of the current control loop, wherein the second preset current value may be set according to an actual need.
Illustratively, the current given value of the current control loop is reduced to a second preset current value, a target duty ratio value is calculated according to related parameters of the current control loop at the moment, the duty ratio of the switching device is adjusted to the target duty ratio, the PWM module in the power supply outputs a square wave to control the switching device according to the target duty ratio, the target duty ratio is usually smaller than the duty ratio of the current switching device when the current switching device is in short circuit, and the purpose of processing the reverse peak of the switching device is achieved by reducing the duty ratio of the switching device to enable the inductive current to work in an intermittent mode.
Different from most means of eliminating power supply peak reversal through hardware, the method can automatically detect the power supply short circuit, adjust the duty ratio according to the power supply short circuit, and achieve the purpose of reducing the power supply output current and processing the power supply peak reversal, is quicker and has high compatibility, and the reliability of the power supply is improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Corresponding to the power supply peak reversal processing method, the embodiment of the invention also provides a power supply peak reversal processing device, and the power supply peak reversal processing device has the same beneficial effects as the power supply peak reversal processing method. Referring to fig. 3, which shows a schematic structural diagram of a power supply anti-peak processing apparatus provided in an embodiment of the present invention, as shown in fig. 3, in some embodiments of the present invention, a power supply anti-peak processing apparatus 20 may include:
an obtaining module 201, configured to obtain an output electrical parameter of a power supply;
the judging module 202 is used for judging whether the power output end is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value;
and the control module 203 is configured to control the inductor current of the power supply to be switched from the continuous mode to the discontinuous mode if it is determined that the power supply output terminal is short-circuited.
In some embodiments of the present invention, the power supply anti-peak processing device 20 may further include a recovery module;
and the recovery module is used for controlling the inductive current of the power supply to recover from the interrupted mode to the continuous mode if the recovery module detects that the output end of the power supply recovers from the short circuit to be normal before the peak-to-peak voltage exceeds the preset peak-to-peak voltage value after the inductive current of the power supply works in the interrupted mode.
In some embodiments of the invention, the output electrical parameter comprises an output voltage or an output current;
the determining module 202 may include a voltage short determining unit and a current short determining unit;
a voltage short circuit judging unit, configured to, when the output electrical parameter is the output voltage:
if the output voltage is lower than the preset voltage value and the duration time of the output voltage lower than the preset voltage value is longer than a first preset time value, judging that the output end of the power supply is short-circuited; otherwise, judging that the output end of the power supply is not short-circuited;
a current short-circuit judging unit, configured to, when the output electrical parameter is an output current:
if the output current is larger than a first preset current value and the duration of the output current larger than the first preset current value is larger than a second preset time value, judging that the output end of the power supply is short-circuited; otherwise, the power supply output end is judged not to be short-circuited.
In some embodiments of the invention, the power supply further comprises a freewheeling diode; the input end of the switching device is connected with the positive input end of the power supply, and the output end of the switching device is respectively connected with the cathode of the freewheeling diode and the first end of the inductor; the second end of the inductor is connected with the negative output end of the power supply; the anode of the fly-wheel diode is respectively connected with the negative input end of the power supply and the negative output end of the power supply;
the control module 203 may include a duty cycle adjustment unit;
and the duty ratio adjusting unit is used for reducing the duty ratio of the switching device so as to switch the inductive current of the power supply from the continuous mode to the discontinuous mode.
In some embodiments of the present invention, the duty cycle adjusting unit may include a current adjusting sub-unit, a duty cycle determining sub-unit, and an adjusting sub-unit;
the current regulation subunit is used for reducing the given current value of the current control loop to a second preset current value;
the duty ratio determining subunit is used for determining a target duty ratio according to the second preset current value and the current control loop;
and the adjusting subunit is used for adjusting the duty ratio of the switching device to a target duty ratio.
Fig. 4 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 4, the terminal 30 of this embodiment includes: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and operable on the processor 301. The processor 301, when executing the computer program 303, implements the steps in the various power supply anti-peak processing method embodiments described above, such as S101 to S103 shown in fig. 1. Alternatively, the processor 301, when executing the computer program 303, implements the functions of the modules/units in the above-described device embodiments, such as the functions of the modules 21 to 23 shown in fig. 3.
Illustratively, the computer program 303 may be partitioned into one or more modules/units, which are stored in the memory 302 and executed by the processor 301 to implement the present invention. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 303 in the terminal 30. For example, the computer program 303 may be divided into the acquisition module 201, the determination module 202 and the control module 203, and the specific functions of each module are as follows:
an obtaining module 201, configured to obtain an output electrical parameter of a power supply;
the judging module 202 is used for judging whether the power output end is short-circuited according to the output electrical parameters; when the power supply output end is short-circuited, the inverse peak voltage at the two ends of the switching device begins to rise; judging whether the short circuit time length of the power output end is less than the standard exceeding time length of the inverse peak voltage at two ends of the switching device according to the output electrical parameters, wherein the standard exceeding time length is the time length from the increase of the inverse peak voltage at two ends of the switching device to the increase of the inverse peak voltage at two ends of the switching device over the preset inverse peak voltage value;
and the control module 203 is configured to control the inductor current of the power supply to be switched from the continuous mode to the discontinuous mode if it is determined that the power supply output terminal is short-circuited.
The terminal 30 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal may include, but is not limited to, a processor 301, a memory 302. Those skilled in the art will appreciate that fig. 4 is merely an example of a terminal 30 and does not constitute a limitation of terminal 30 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal may also include input-output devices, network access devices, buses, etc.
The Processor 301 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 302 may be an internal storage unit of the terminal 30, such as a hard disk or a memory of the terminal 30. The memory 302 may also be an external storage device of the terminal 30, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the terminal 30. Further, the memory 302 may also include both internal and external memory units of the terminal 30. The memory 302 is used for storing computer programs and other programs and data required by the terminal. The memory 302 may also be used to temporarily store data that has been output or is to be output.
The embodiment of the present invention further provides a power supply, which includes a switching device, a freewheeling diode, an inductor and the terminal 30 provided above;
the input end of the switching device is connected with the positive input end of the power supply, the output end of the switching device is respectively connected with the cathode of the freewheeling diode and the first end of the inductor, and the control end of the switching device is connected with the terminal;
the second end of the inductor is connected with the negative output end of the power supply;
and the anode of the fly-wheel diode is respectively connected with the negative input end of the power supply and the negative output end of the power supply.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. 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 invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A power supply peak reversal processing method is characterized in that a power supply comprises a switching device and an inductor which are sequentially connected, and the power supply peak reversal processing method comprises the following steps:
acquiring output electrical parameters of a power supply;
judging whether the power supply output end is short-circuited according to the output electrical parameter; wherein, when the power output terminal is short-circuited, the inverse peak voltage across the switching device starts to rise; the time length for judging whether the output end of the power supply is short-circuited according to the output electrical parameters is less than the standard exceeding time length of the peak reversal voltage at the two ends of the switching device, wherein the standard exceeding time length is the time length from the rise of the peak reversal voltage at the two ends of the switching device to the time length of the peak reversal voltage at the two ends of the switching device exceeding the preset peak reversal voltage value;
and if the output end of the power supply is judged to be short-circuited, controlling the inductive current of the power supply to be switched from a continuous mode to an intermittent mode.
2. The power supply anti-peak processing method according to claim 1, wherein after the inductor current controlling the power supply is switched from the continuous mode to the discontinuous mode, the power supply anti-peak processing method further comprises:
and if the situation that the output end of the power supply is recovered from the short circuit to be normal is detected before the inverse peak voltage exceeds the preset inverse peak voltage value, controlling the inductive current of the power supply to recover from an intermittent mode to a continuous mode.
3. The power supply anti-peak processing method of claim 1, wherein the output electrical parameter comprises an output voltage or an output current;
the judging whether the power output end is short-circuited according to the output electrical parameter includes:
when the output electrical parameter is an output voltage:
if the output voltage is lower than a preset voltage value and the duration time of the output voltage lower than the preset voltage value is longer than a first preset time value, determining that the power supply output end is short-circuited; otherwise, judging that the power supply output end is not short-circuited;
when the output electrical parameter is an output current:
if the output current is larger than a first preset current value and the duration of the output current larger than the first preset current value is larger than a second preset time value, judging that the power supply output end is short-circuited; otherwise, judging that the power supply output end is not short-circuited.
4. The power supply anti-peak processing method according to any one of claims 1 to 3, wherein the power supply further comprises a freewheeling diode; the input end of the switching device is connected with the positive input end of the power supply, and the output end of the switching device is respectively connected with the cathode of the freewheeling diode and the first end of the inductor; the second end of the inductor is connected with the negative output end of the power supply; the anode of the freewheeling diode is respectively connected with the negative input end of the power supply and the negative output end of the power supply;
the controlling of the inductor current of the power supply is switched from a continuous mode to a discontinuous mode, and comprises the following steps:
and reducing the duty ratio of the switching device to switch the inductive current of the power supply from a continuous mode to a discontinuous mode.
5. The power supply anti-peak processing method of claim 4, wherein the reducing the duty cycle of the switching device comprises:
reducing the current given value of the current control loop to a second preset current value;
determining a target duty ratio according to the second preset current value and the current control loop;
adjusting a duty cycle of the switching device to the target duty cycle.
6. A power supply anti-peak processing apparatus, comprising:
the acquisition module is used for acquiring output electrical parameters of the power supply;
the judging module is used for judging whether the power supply output end is short-circuited according to the output electrical parameters; wherein, when the power output terminal is short-circuited, the inverse peak voltage across the switching device starts to rise; the time length for judging whether the output end of the power supply is short-circuited according to the output electrical parameters is less than the standard exceeding time length of the peak reversal voltage at the two ends of the switching device, wherein the standard exceeding time length is the time length from the rise of the peak reversal voltage at the two ends of the switching device to the time length of the peak reversal voltage at the two ends of the switching device exceeding the preset peak reversal voltage value;
and the control module is used for switching the inductive current of the control power supply from a continuous mode to an intermittent mode if the short circuit of the power supply output end is judged.
7. The power supply peak-off processing apparatus of claim 6, further comprising a recovery module;
and the recovery module is used for controlling the inductive current of the power supply to recover from the interrupted mode to the continuous mode if the power supply output end is detected to recover from the short circuit before the inverse peak voltage exceeds the preset inverse peak voltage value after the inductive current of the power supply is controlled to work in the interrupted mode.
8. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the power supply anti-peak processing method according to any one of claims 1 to 5 when executing the computer program.
9. A power supply comprising a switching device, a freewheeling diode, an inductor and the terminal of claim 8;
the input end of the switching device is connected with the positive input end of the power supply, the output end of the switching device is respectively connected with the cathode of the freewheeling diode and the first end of the inductor, and the control end of the switching device is connected with the terminal;
the second end of the inductor is connected with the negative output end of the power supply;
and the anode of the freewheeling diode is respectively connected with the negative input end of the power supply and the negative output end of the power supply.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the power supply anti-peak processing method according to any one of claims 1 to 5 above.
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| CN201830511U (en) * | 2010-09-03 | 2011-05-11 | 北京朗波尔光电股份有限公司 | High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp |
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| CN201830511U (en) * | 2010-09-03 | 2011-05-11 | 北京朗波尔光电股份有限公司 | High-frequency electronic transformer for low-voltage high-power light emitting diode (LED) spot lamp |
| JP2018074762A (en) * | 2016-10-29 | 2018-05-10 | 富士電機株式会社 | Switching power supply device |
| CN110299696A (en) * | 2019-06-21 | 2019-10-01 | 科华恒盛股份有限公司 | T-type three-level current transformer and its short-circuit protection circuit |
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