CN114337215A - Power derating method and device for power conversion circuit, terminal and storage medium - Google Patents
Power derating method and device for power conversion circuit, terminal and storage medium Download PDFInfo
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Abstract
The invention provides a power de-rating method, a device, a terminal and a storage medium of a power conversion circuit, wherein the method comprises the following steps: acquiring parameter values of a plurality of hot risk influence parameters of the power conversion circuit; determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot risk influence parameters act independently; determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when all the hot risk influence parameters act together; and carrying out output power derating on the power conversion circuit according to the total derating coefficient. The invention comprehensively considers the hot air danger caused by a plurality of factors to the circuit to obtain the total derating coefficient, and can improve the effect of performing power protection on the circuit.
Description
Technical Field
The present invention relates to the field of circuit protection technologies, and in particular, to a power derating method and apparatus for a power conversion circuit, a terminal, and a storage medium.
Background
Currently, a protection strategy is set in a power supply circuit to protect a power device. For example, when the ambient temperature is too high, over-temperature protection is triggered to stop power output.
However, these protection strategies usually consider the influence of only one factor on the power device, and do not consider the influence of other factors on the device, resulting in poor protection effect.
Disclosure of Invention
The invention provides a power derating method, a power derating device, a power derating terminal and a power derating storage medium of a power conversion circuit, and aims to solve the problem of poor protection effect on a power device.
In a first aspect, the present invention provides a power de-rating method for a power conversion circuit, including:
acquiring parameter values of a plurality of hot risk influence parameters of the power conversion circuit;
determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently;
determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together;
and carrying out output power derating on the power conversion circuit according to the total derating coefficient.
In one possible implementation, the first preset relationship includes a derating curve;
determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter, wherein the independent derating coefficient comprises the following steps:
obtaining derating curves corresponding to the hot air risk influence parameters according to the working mode in the power conversion circuit; the working mode in the power conversion circuit comprises a rectification mode and an inversion mode;
and determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to each derating curve and the parameter value of each hot air risk influence parameter.
In one possible implementation, the power conversion circuit includes an ac terminal and a dc terminal; the hot air risk influence parameters comprise an alternating current terminal voltage, a direct current terminal voltage and an environment temperature;
obtaining derating curves corresponding to the hot risk influence parameters according to the working mode of the power conversion circuit, wherein the derating curves comprise:
obtaining a derating curve corresponding to the ambient temperature and a derating curve corresponding to the alternating-current terminal voltage according to the working mode of the power conversion circuit;
and obtaining a derating curve corresponding to the direct-current end voltage according to the environment temperature and the working mode of the power conversion circuit.
In a possible implementation manner, determining an independent derating coefficient corresponding to a parameter value of each risk influencing parameter according to each derating curve and the parameter value of each risk influencing parameter includes:
and aiming at each hot air risk influence parameter, searching an independent derating coefficient corresponding to the parameter value of the hot air risk influence parameter on a derating curve corresponding to the hot air risk influence parameter.
In a possible implementation manner, the second predetermined relationship is:
f(k1，k2，...，kn)＝k1*k2*...*kn
wherein, f (k)1，k2，...，kn) Representing the total derating coefficient, k1、k2、...、knRespectively representing different independent derating coefficients.
In one possible implementation, the power conversion circuit includes an ac terminal and a dc terminal;
carrying out output power derating on the power conversion circuit according to the total derating coefficient, and the method comprises the following steps:
and if the working mode of the power conversion circuit is a rectification mode, regulating the direct current output current of the power conversion circuit according to the total derating coefficient.
In one possible implementation, the power conversion circuit includes an ac terminal and a dc terminal;
carrying out output power derating on the power conversion circuit according to the total derating coefficient, and the method comprises the following steps:
and if the working mode of the power conversion circuit is an inversion mode, adjusting the direct current input current of the power conversion circuit according to the total derating coefficient.
In a second aspect, the present invention provides a power de-rating apparatus for a power conversion circuit, comprising:
the acquisition module is used for acquiring parameter values of a plurality of hot air risk influence parameters of the power conversion circuit;
the determining module is used for determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently;
the calculation module is used for determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together;
and the derating module is used for derating the output power of the power conversion circuit according to the total derating coefficient.
In a third aspect, the present invention provides a terminal, comprising a memory, a processor and a computer program stored in the memory and being executable on the processor, wherein the processor implements the steps of the power de-rating method for the power conversion circuit as shown in the first aspect or any one of the possible implementations of the first aspect when executing the computer program.
In a fourth aspect, the present invention provides a computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the steps of the power de-rating method for a power conversion circuit as set forth in the first aspect or any one of the possible implementations of the first aspect.
The invention provides a power de-rating method, a device, a terminal and a storage medium of a power conversion circuit, wherein the method comprises the following steps: acquiring parameter values of a plurality of hot risk influence parameters of the power conversion circuit; determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently; determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together; and carrying out output power derating on the power conversion circuit according to the total derating coefficient. The invention comprehensively considers the hot air danger caused by a plurality of factors to the circuit to obtain the total derating coefficient, and can improve the effect of performing power protection on the circuit.
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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 flowchart of an implementation of a power derating method of a power conversion circuit according to an embodiment of the present invention;
FIG. 2 is a derating curve provided by one embodiment of the present invention;
FIG. 3 is a derating curve provided by another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power de-rating device of a power conversion circuit according to an embodiment of the present invention;
fig. 5 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 derating method of a power conversion circuit provided in an embodiment of the present invention, which is detailed as follows:
In this embodiment, the thermal risk influence parameter refers to a parameter that may bring a thermal risk to the component, for example, when the environmental temperature is too high, the internal temperature of the component may also be high, and if the internal temperature continues to be high, the component may malfunction.
102, determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently.
In this embodiment, the independent derating factor is firstly used to ensure the safe operation of the circuit, and on the other hand, to ensure the maximum output power of the circuit. For any hot air risk influence parameter, each parameter value of the hot air risk influence parameter corresponds to an independent derating coefficient, the corresponding independent derating coefficient is determined under the condition that other hot air risk influence parameters are rated working conditions, the independent derating coefficient can ensure that the hot air risk influence parameters cannot bring thermal risks to components in a circuit, and the output power of the circuit is as large as possible.
103, determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multi-element function relation of the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter is acted together.
In this embodiment, each independent derating coefficient can only ensure that the thermal risk influence parameter corresponding to the independent derating coefficient does not bring the thermal risk of the component, and the parameter value of each thermal risk influence parameter in the circuit may be in the interval that may bring the thermal risk of the component. At this time, the second preset relationship may be regarded as a multivariate function, each risk influence parameter is an independent variable of the multivariate function, and a change of any risk influence parameter affects the total derating coefficient.
And 104, carrying out output power derating on the power conversion circuit according to the total derating coefficient.
In this embodiment, the derated output power is the maximum output power of the power conversion circuit under the premise of safe operation. The specific derating mode can be that the derating of the output power is realized by adjusting the output current and the input power of the power conversion circuit.
In some embodiments, the first preset relationship comprises a derating curve;
determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter, wherein the independent derating coefficient comprises the following steps:
obtaining derating curves corresponding to the hot air risk influence parameters according to the working mode in the power conversion circuit; the working mode in the power conversion circuit comprises a rectification mode and an inversion mode;
and determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to each derating curve and the parameter value of each hot air risk influence parameter.
In this embodiment, the power conversion circuit may be a rectifier circuit, an inverter circuit, or a bidirectional charging circuit. If the power conversion circuit is a unidirectional rectifying circuit or an inverting circuit and can only work in a rectifying mode or an inverting mode, the corresponding derating curve is the derating curve of the power conversion circuit. If the power conversion circuit is a bidirectional charging circuit, the power conversion circuit can work in a rectification mode and an inversion mode, and different working modes correspond to different derating curves.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal; the hot air risk influence parameters comprise an alternating current terminal voltage, a direct current terminal voltage and an environment temperature;
obtaining derating curves corresponding to the hot risk influence parameters according to the working mode of the power conversion circuit, wherein the derating curves comprise:
obtaining a derating curve corresponding to the ambient temperature and a derating curve corresponding to the alternating-current terminal voltage according to the working mode of the power conversion circuit;
and obtaining a derating curve corresponding to the direct-current end voltage according to the environment temperature and the working mode of the power conversion circuit.
In this embodiment, the lower the ambient temperature is, the lower the possibility that the component is subjected to a thermal risk due to the influence of the dc terminal voltage is, and thus, the derating curves corresponding to the dc terminal voltage of the power conversion circuit are different at different ambient temperatures.
In some embodiments, determining an independent derating coefficient corresponding to the parameter value of each risk influencing parameter according to each derating curve and the parameter value of each risk influencing parameter includes:
and aiming at each hot air risk influence parameter, searching an independent derating coefficient corresponding to the parameter value of the hot air risk influence parameter on a derating curve corresponding to the hot air risk influence parameter.
In this embodiment, the parameter value of the hot risk influence parameter may be substituted into the corresponding derating coefficient function expression to obtain the corresponding independent derating coefficient.
In some embodiments, the second predetermined relationship is:
f(k1，k2，...，kn)＝k1*k2*...*kn
wherein, f (k)1，k2，...，kn) Representing the total derating coefficient, k1、k2、...、knRespectively representing different independent derating coefficients.
In this embodiment, each independent derating coefficient can only perform power derating for a single hot air risk influence parameter, and it is ensured that the hot air risk influence parameter corresponding to the independent derating coefficient does not bring a thermal risk to the component, and the components are still free of the thermal risk after the superposition of a plurality of hot air risk influence parameters are multiplied by the independent derating coefficients.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal;
carrying out output power derating on the power conversion circuit according to the total derating coefficient, and the method comprises the following steps:
and if the working mode of the power conversion circuit is a rectification mode, regulating the direct current output current of the power conversion circuit according to the total derating coefficient.
In this embodiment, when the operating mode of the power conversion circuit is the rectification mode, the ac terminal of the power conversion circuit is the input terminal, and the dc terminal of the power conversion circuit is the output terminal, so that the output power of the power conversion circuit can be more accurately adjusted by adjusting the output current of the dc terminal.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal;
carrying out output power derating on the power conversion circuit according to the total derating coefficient, and the method comprises the following steps:
and if the working mode of the power conversion circuit is an inversion mode, adjusting the direct current input current of the power conversion circuit according to the total derating coefficient.
In this embodiment, when the operating mode of the power conversion circuit is the inverter mode, the dc terminal of the power conversion circuit is the input terminal, and the ac terminal is the output terminal, and adjusting the input current of the dc terminal can adjust the input power of the power conversion circuit more accurately, thereby indirectly adjusting the output power of the power conversion circuit.
In a specific embodiment, the power conversion circuit is a bidirectional charging circuit, and includes a buck-boost circuit, an LLC resonant circuit, and a T-type three-level circuit connected in series in sequence, where one end of the buck-boost circuit is a dc terminal, and one end of the T-type three-level circuit is an ac terminal. Taking a direct-current end voltage, an alternating-current end voltage and an ambient temperature as hot air risk influence parameters, testing the power conversion circuit in a rectification mode, and obtaining 4 derating curves shown in fig. 2 after arrangement, wherein fig. 2a is an independent derating coefficient curve corresponding to the direct-current end voltage when the ambient temperature is higher than 45 ℃, fig. 2b is an independent derating coefficient curve corresponding to the direct-current end voltage when the ambient temperature is lower than 43 ℃, fig. 2c is an independent derating coefficient curve corresponding to the alternating-current end voltage, and fig. 2d is an independent derating coefficient curve corresponding to the ambient temperature; the power conversion circuit is tested in an inversion mode, and 4 derating curves shown in fig. 3 are obtained after arrangement, wherein fig. 3a is an independent derating coefficient curve corresponding to a direct-current terminal voltage when an ambient temperature is lower than 43 ℃, fig. 3b is an independent derating coefficient curve corresponding to a direct-current terminal voltage when an ambient temperature is higher than 45 ℃, fig. 3c is an independent derating coefficient curve corresponding to an alternating-current terminal voltage, and fig. 3d is an independent derating coefficient curve corresponding to an ambient temperature. Through tests, the power derating method of the power conversion circuit and the derating curve provided by the invention are adopted to perform power derating on the bidirectional charging circuit in the embodiment, so that the maximum output power can be ensured on the premise of ensuring the safe operation of the bidirectional charging circuit.
The power derating method of the power conversion circuit provided by the embodiment of the invention comprises the following steps: acquiring parameter values of a plurality of hot risk influence parameters of the power conversion circuit; determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently; determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together; and carrying out output power derating on the power conversion circuit according to the total derating coefficient. The invention comprehensively considers the hot air danger caused by a plurality of factors to the circuit to obtain the total derating coefficient, and can improve the effect of performing power protection on the circuit.
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.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 4 is a schematic structural diagram of a power de-rating device of a power conversion circuit according to an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
as shown in fig. 4, the power de-rating device 4 of the power conversion circuit includes:
an obtaining module 41, configured to obtain parameter values of a plurality of hot air risk influencing parameters of the power conversion circuit;
the determining module 42 is configured to determine, according to the parameter value of each hot air risk influence parameter and the first preset relationship corresponding to each hot air risk influence parameter, an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently;
a calculating module 43, configured to determine a total derating coefficient according to each independent derating coefficient and a second preset relationship; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together;
and the derating module 44 is used for performing output power derating on the power conversion circuit according to the total derating coefficient.
In some embodiments, the first preset relationship comprises a derating curve;
the determination module 42 includes:
the curve acquisition unit is used for acquiring derating curves corresponding to the hot risk influence parameters according to the working mode in the power conversion circuit; the working mode in the power conversion circuit comprises a rectification mode and an inversion mode;
and the coefficient determining unit is used for determining the independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to each derating curve and the parameter value of each hot air risk influence parameter.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal; the hot air risk influence parameters comprise an alternating current terminal voltage, a direct current terminal voltage and an environment temperature;
the curve acquisition unit is specifically configured to:
obtaining a derating curve corresponding to the ambient temperature and a derating curve corresponding to the alternating-current terminal voltage according to the working mode of the power conversion circuit;
and obtaining a derating curve corresponding to the direct-current end voltage according to the environment temperature and the working mode of the power conversion circuit.
In some embodiments, the coefficient determination unit is specifically configured to:
and aiming at each hot air risk influence parameter, searching an independent derating coefficient corresponding to the parameter value of the hot air risk influence parameter on a derating curve corresponding to the hot air risk influence parameter.
In some embodiments, the second predetermined relationship is:
f(k1，k2，...，kn)＝k1*k2*...*kn
wherein, f (k)1，k2，...，kn) Representing the total derating coefficient, k1、k2、...、knRespectively representing different independent derating coefficients.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal;
and if the working mode of the power conversion circuit is a rectification mode, regulating the direct current output current of the power conversion circuit according to the total derating coefficient.
In some embodiments, a power conversion circuit includes an ac terminal and a dc terminal;
and if the working mode of the power conversion circuit is an inversion mode, adjusting the direct current input current of the power conversion circuit according to the total derating coefficient.
The power de-rating device of the power conversion circuit provided by the embodiment of the invention comprises: the acquisition module is used for acquiring parameter values of a plurality of hot air risk influence parameters of the power conversion circuit; the determining module is used for determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and the parameter value of the corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently; the calculation module is used for determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot risk influence parameter acts together; and the derating module is used for derating the output power of the power conversion circuit according to the total derating coefficient. The invention comprehensively considers the hot air danger caused by a plurality of factors to the circuit to obtain the total derating coefficient, and can improve the effect of performing power protection on the circuit.
Fig. 5 is a schematic diagram of a terminal according to an embodiment of the present invention. As shown in fig. 5, the terminal 5 of this embodiment includes: a processor 50, a memory 51 and a computer program 52 stored in said memory 51 and executable on said processor 50. The processor 50, when executing the computer program 52, implements the steps in the power de-rating method embodiments of the various power conversion circuits described above, such as the steps 101-104 shown in fig. 1. Alternatively, the processor 50, when executing the computer program 52, implements the functions of the modules in the above-described device embodiments, such as the functions of the modules 41 to 44 shown in fig. 4.
Illustratively, the computer program 52 may be partitioned into one or more modules that are stored in the memory 51 and executed by the processor 50 to implement the present invention. The one or more modules 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 52 in the terminal 5. For example, the computer program 52 may be divided into the modules 41 to 44 shown in fig. 4.
The terminal 5 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal 5 may include, but is not limited to, a processor 50, a memory 51. It will be appreciated by those skilled in the art that fig. 5 is only an example of a terminal 5 and does not constitute a limitation of the terminal 5 and may include more or less components than those shown, or some components in combination, or different components, for example the terminal may also include input output devices, network access devices, buses, etc.
The Processor 50 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, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 51 may be an internal storage unit of the terminal 5, such as a hard disk or a memory of the terminal 5. The memory 51 may also be an external storage device of the terminal 5, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) and the like provided on the terminal 5. Further, the memory 51 may also include both an internal storage unit and an external storage device of the terminal 5. The memory 51 is used for storing the computer program and other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.
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 to perform all or part of the above-mentioned functions. 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, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be 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.
The 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 module, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the embodiments of the power derating method of each power conversion circuit may be implemented. 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 the computer program code, recording medium, usb 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 medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; 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 method for derating power in a power conversion circuit, comprising:
acquiring parameter values of a plurality of hot risk influence parameters of the power conversion circuit;
determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and a parameter value of a corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently;
determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot air risk influence parameter is acted together;
and carrying out output power derating on the power conversion circuit according to the total derating coefficient.
2. The power derating method for a power conversion circuit as claimed in claim 1, wherein the first predetermined relationship comprises a derating curve;
the determining of the independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and the first preset relationship corresponding to each hot air risk influence parameter includes:
obtaining derating curves corresponding to the hot air risk influence parameters according to the working mode in the power conversion circuit; the working mode in the power conversion circuit comprises a rectification mode and an inversion mode;
and determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to each derating curve and the parameter value of each hot air risk influence parameter.
3. The power derating method of the power conversion circuit according to claim 2, wherein the power conversion circuit includes an ac terminal and a dc terminal; the hot air risk influence parameters comprise an alternating current terminal voltage, a direct current terminal voltage and an environment temperature;
the obtaining of derating curves corresponding to the hot air risk influence parameters according to the working mode of the power conversion circuit includes:
obtaining a derating curve corresponding to the ambient temperature and a derating curve corresponding to the alternating-current terminal voltage according to the working mode of the power conversion circuit;
and acquiring a derating curve corresponding to the direct-current terminal voltage according to the environment temperature and the working mode of the power conversion circuit.
4. The power derating method for the power conversion circuit according to claim 2, wherein the determining the independent derating coefficient corresponding to the parameter value of each risk influencing parameter according to each derating curve and the parameter value of each risk influencing parameter comprises:
and aiming at each hot air risk influence parameter, searching an independent derating coefficient corresponding to the parameter value of the hot air risk influence parameter on a derating curve corresponding to the hot air risk influence parameter.
5. The power derating method for power conversion circuits according to claim 1, wherein the second predetermined relationship is:
f(k1,k2,…，kn)＝k1*k2*…*kn
wherein, f (k)1,k2,…，kn) Representing the total derating coefficient, k1、k2、…、knRespectively representing different independent derating coefficients.
6. The power de-rating method of the power conversion circuit according to any of claims 1 to 5, wherein the power conversion circuit comprises an AC terminal and a DC terminal;
the derating the output power of the power conversion circuit according to the total derating coefficient comprises the following steps:
and if the working mode of the power conversion circuit is a rectification mode, regulating the direct current output current of the power conversion circuit according to the total derating coefficient.
7. The power de-rating method of the power conversion circuit according to any of claims 1 to 5, wherein the power conversion circuit comprises an AC terminal and a DC terminal;
the derating the output power of the power conversion circuit according to the total derating coefficient comprises the following steps:
and if the working mode of the power conversion circuit is an inversion mode, adjusting the direct current input current of the power conversion circuit according to the total derating coefficient.
8. A power de-rating apparatus for a power conversion circuit, comprising:
the acquisition module is used for acquiring parameter values of a plurality of hot air risk influence parameters of the power conversion circuit;
the determining module is used for determining an independent derating coefficient corresponding to the parameter value of each hot air risk influence parameter according to the parameter value of each hot air risk influence parameter and a first preset relation corresponding to each hot air risk influence parameter; the first preset relation is used for representing a unitary function relation between the independent derating coefficient and a parameter value of a corresponding hot air risk influence parameter, and the independent derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when the corresponding hot air risk influence parameter acts independently;
the calculation module is used for determining a total derating coefficient according to each independent derating coefficient and a second preset relation; the second preset relation is used for representing a multivariate function relation between the total derating coefficient and each independent derating coefficient, and the total derating coefficient is used for mapping the maximum allowable power of the power conversion circuit when each hot air risk influence parameter is acted together;
and the derating module is used for performing output power derating on the power conversion circuit according to the total derating coefficient.
9. A terminal comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor when executing the computer program implements the steps of the power de-rating method of the power conversion circuit according to any of the preceding claims 1 to 7.
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 de-rating method of a power conversion circuit according to any of the claims 1 to 7 above.
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| CN202111440539.5A CN114337215A (en) | 2021-11-30 | 2021-11-30 | Power derating method and device for power conversion circuit, terminal and storage medium |
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| CN202111440539.5A CN114337215A (en) | 2021-11-30 | 2021-11-30 | Power derating method and device for power conversion circuit, terminal and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118677231A (en) * | 2024-08-23 | 2024-09-20 | 深圳市能效电气技术有限公司 | Method for simplifying temperature derating control logic of digital switching power supply |
| CN118677231B (en) * | 2024-08-23 | 2024-10-25 | 深圳市能效电气技术有限公司 | Method for simplifying temperature derating control logic of digital switching power supply |
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| CN103828207A (en) * | 2011-09-27 | 2014-05-28 | 通用电气公司 | Power system junction temperature control |
| CN112327735A (en) * | 2020-10-29 | 2021-02-05 | 深圳市汇顶科技股份有限公司 | Industrial control system protection method, device, equipment and storage medium thereof |
| CN112649752A (en) * | 2020-11-25 | 2021-04-13 | 深圳市大能创智半导体有限公司 | Derating curve measuring method and system |
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| CN103828207A (en) * | 2011-09-27 | 2014-05-28 | 通用电气公司 | Power system junction temperature control |
| CN112327735A (en) * | 2020-10-29 | 2021-02-05 | 深圳市汇顶科技股份有限公司 | Industrial control system protection method, device, equipment and storage medium thereof |
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| CN118677231A (en) * | 2024-08-23 | 2024-09-20 | 深圳市能效电气技术有限公司 | Method for simplifying temperature derating control logic of digital switching power supply |
| CN118677231B (en) * | 2024-08-23 | 2024-10-25 | 深圳市能效电气技术有限公司 | Method for simplifying temperature derating control logic of digital switching power supply |
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