Output voltage regulation method, output voltage regulation device and electronic equipment

Abstract

The invention provides an output voltage adjusting method, an output voltage adjusting device and electronic equipment, and relates to the technical field of power electronic conversion, and the output voltage adjusting method is applied to a voltage conversion circuit and used for adjusting the output voltage value of the voltage conversion circuit. The output voltage adjusting method comprises the following steps: determining an adjusting voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit; detecting current in the voltage conversion circuit to obtain a detection current value of the voltage conversion circuit, and determining a maximum output voltage value of the voltage conversion circuit according to the detection current value; and adjusting the output voltage value of the voltage conversion circuit to be the adjusting voltage value or the maximum output voltage value according to the relationship between the adjusting voltage value and the maximum output voltage value. The output voltage value of the voltage conversion circuit can be quickly adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of power electronic conversion, and in particular to an output voltage regulation method, an output voltage regulation device and an electronic device. Background Art

[0002] With the development of power electronic conversion technology, voltage conversion circuits have become an indispensable component of electronic devices. Voltage conversion circuits can convert input DC voltages into different DC voltages required by electronic devices. Among them, buck circuits, boost circuits, and buck-boost circuits are all common voltage conversion circuits. In actual use, how to quickly adjust the output voltage value of the voltage conversion circuit has become a problem that needs to be considered. Summary of the invention

[0003] The present application provides an output voltage regulation method, an output voltage regulation device and an electronic device, which can quickly regulate the output voltage value of a voltage conversion circuit.

[0004] In a first aspect, an output voltage regulation method is provided, which is applied to a voltage conversion circuit and is used to adjust the output voltage value of the voltage conversion circuit. The output voltage regulation method includes: determining an regulated voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit; detecting a current in the voltage conversion circuit to obtain a detected current value of the voltage conversion circuit, and determining a maximum output voltage value of the voltage conversion circuit according to the detected current value; and adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

[0005] In a possible implementation, adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value based on the relationship between the regulated voltage value and the maximum output voltage value includes: if the regulated voltage value is less than or equal to the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to the regulated voltage value; and, if the regulated voltage value is greater than the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to the maximum output voltage value.

[0006] In a possible implementation, determining the adjustment voltage value based on the preset voltage value and the current output voltage value of the voltage conversion circuit includes: performing a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value; performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensated voltage value; and performing an addition operation on the proportional differential voltage value, the feedforward voltage value, and the compensation voltage value to obtain the adjustment voltage value.

[0007] In a possible implementation, the proportional differential operation is performed on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value, including: subtracting the preset voltage value from the current output voltage value of the voltage conversion circuit to obtain a differential voltage value; performing proportional and differential operations on the differential voltage value to obtain a proportional voltage value and a differential voltage value respectively; and adding the proportional voltage value and the differential voltage value to obtain a proportional differential voltage value.

[0008] In one possible implementation, the voltage conversion circuit includes an inductance module and a capacitance module, and the voltage conversion circuit is used to connect to a load so that the voltage conversion circuit has an equivalent inductance value, an equivalent capacitance value, and an equivalent impedance value; wherein, the feedforward operation is performed on the preset voltage value to obtain a feedforward voltage value, and the compensation operation is performed on the preset voltage value to obtain a compensated voltage value, including: obtaining a feedforward operation preset relationship between the preset voltage value and the feedforward voltage value, wherein the feedforward operation preset relationship is related to the equivalent inductance value, the equivalent capacitance value, and the equivalent impedance value of the voltage conversion circuit; based on the feedforward operation preset relationship, a feedforward operation is performed on the preset voltage value to obtain a feedforward voltage value.

[0009] In a possible implementation, the performing of a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and the performing of a compensation operation on the preset voltage value to obtain a compensated voltage value, further include: obtaining a preset compensation operation relationship between the preset voltage value and the compensated voltage value, wherein the preset compensation operation relationship is related to an equivalent inductance value, an equivalent capacitance value, an equivalent impedance value and a current output voltage value of the voltage conversion circuit; and performing a compensation operation on the preset voltage value based on the preset compensation operation relationship to obtain a compensated voltage value.

[0010] In a possible implementation, the current in the voltage conversion circuit is detected to obtain a detection current value of the voltage conversion circuit, and the maximum output voltage value of the voltage conversion circuit is determined based on the detection current value, including: detecting the current in the voltage conversion circuit to obtain a detection current value of the voltage conversion circuit, and determining the maximum output current value of the voltage conversion circuit based on the detection current value; at least determining the maximum output voltage value of the voltage conversion circuit based on the maximum output current value of the voltage conversion circuit.

[0011] In a possible implementation, the voltage conversion circuit includes a switch module, and the voltage conversion circuit is used to convert the input voltage value into the output voltage value; wherein, if the regulated voltage value is less than or equal to the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the regulated voltage value; and, if the regulated voltage value is greater than the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the maximum output voltage value, including: if the regulated voltage value is less than or equal to the maximum output voltage value, the on-duty cycle of the regulated switch module is controlled to be the ratio of the regulated voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value; and, if the regulated voltage value is greater than the maximum output voltage value, the on-duty cycle of the regulated switch module is controlled to be the ratio of the maximum output voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the maximum output voltage value.

[0012] In a second aspect, an output voltage regulating device is also provided, which adopts the above-mentioned output voltage regulating method to regulate the output voltage value of a voltage conversion circuit; wherein, the output voltage regulating device includes: a first determination unit, used to determine the regulated voltage value according to a preset voltage value and the current output voltage value of the voltage conversion circuit; a second determination unit, used to detect the current in the voltage conversion circuit to obtain the detection current value of the voltage conversion circuit, and determine the maximum output voltage value of the voltage conversion circuit according to the detection current value; a control unit, used to adjust the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

[0013] In a third aspect, an electronic device is also provided, the electronic device comprising a voltage conversion circuit and the above-mentioned output voltage regulating device.

[0014] The output voltage regulation method, output voltage regulation device and electronic device of the present application determine the regulated voltage value according to the preset voltage value and the current output voltage value of the voltage conversion circuit, can quickly determine the regulated voltage value, and obtain the detection current value of the voltage conversion circuit by detecting the current in the voltage conversion circuit, and then determine the maximum output voltage value of the voltage conversion circuit according to the detection current value, and can also adjust the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value, thereby quickly adjusting the output voltage value of the voltage conversion circuit and performing corresponding protection on the voltage conversion circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0016] Figure 1 Flow chart of an output voltage regulation method in one embodiment of the present application.

[0017] Figure 2 for Figure 1 A sub-flowchart of step S300 in FIG.

[0018] Figure 3 for Figure 2 A sub-flowchart of steps S310 to S320 in .

[0019] Figure 4 for Figure 1 A sub-flowchart of step S200 in FIG.

[0020] Figure 5 for Figure 1 A sub-flowchart of step S100 in FIG.

[0021] Figure 6 for Figure 5 A sub-flowchart of step S110 in .

[0022] Figure 7 for Figure 5 A sub-flowchart of step S120 in .

[0023] Figure 8 for Figure 5 Another sub-flowchart of step S120 in .

[0024] Fig. 9 Schematic diagram of a block diagram of an output voltage regulating device in an embodiment of the present application.

[0025] Fig.10 FIG. 4 is a block diagram of an output voltage regulating device in another embodiment of the present application.

[0026] Fig.11 It is a schematic diagram of an electronic device in an embodiment of the present application.

[0027] Description of reference numerals: 1000, electronic device, 10, output voltage regulating device, 100, first determining unit, U1, output voltage value, 110, proportional operation module, Up, proportional voltage value, 120, differential operation module, Ud, differential voltage value, 130, feedforward operation module, Uf, feedforward voltage value, 140, compensation operation module, Ue, compensation voltage value, 150, first operator, Us, differential voltage value, 160, second operator, Upd, proportional differential voltage value, 170, third operator, Uc, regulating voltage value, 200, second determination unit, I1, detection current value, 210, maximum value operation module, Um, maximum output voltage value, 300, control unit, U*, preset voltage value, CS, control signal, 20, voltage conversion circuit, 21, inductance module, L1, first inductance, 22, capacitance module, C1, first capacitance, 23, switch module, S1, first switch, 24, diode module, D1, first diode, IN+, input positive pole, IN-, input negative pole, Uin, input voltage value, GND, ground, 40, load. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the following, the terms "first", "second", "third", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of the feature. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the embodiments of the present application, it should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the features used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0032] In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or device.

[0033] See also Figure 1 , Figure 1 Flow chart of an output voltage regulation method in one embodiment of the present application. The present application provides an output voltage regulation method, which is applied to a voltage conversion circuit to regulate the output voltage value of the voltage conversion circuit; wherein, Figure 1 As shown, the output voltage regulation method includes:

[0034] Step S100: determining an adjustment voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit.

[0035] The preset voltage value is the output voltage value of the required voltage conversion circuit, and the preset voltage value can be set according to specific needs.

[0036] Among them, step S100 may include: performing one or more of feedforward operation, proportional integral (PI) operation, proportional differential (PD) operation, proportional integral differential (PID) operation and compensation operation on the preset voltage value and / or the current output voltage value of the voltage conversion circuit to determine the adjusted voltage value.

[0037] Step S200: Detect the current in the voltage conversion circuit to obtain the detected current value of the voltage conversion circuit, and determine the maximum output voltage value of the voltage conversion circuit according to the detected current value.

[0038] Step S300: adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

[0039] In one or more embodiments, the voltage conversion circuit may be a Buck circuit, a Boost circuit, or a Buck-Boost circuit.

[0040] Therefore, the above-mentioned output voltage regulation method in the present application determines the regulated voltage value according to the preset voltage value and the current output voltage value of the voltage conversion circuit, can quickly determine the regulated voltage value, and obtain the detection current value of the voltage conversion circuit by detecting the current in the voltage conversion circuit, and then determine the maximum output voltage value of the voltage conversion circuit according to the detection current value, and can also adjust the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value, thereby being able to quickly adjust the output voltage value of the voltage conversion circuit and also be able to perform corresponding protection on the voltage conversion circuit.

[0041] Specifically, the output voltage value of the voltage conversion circuit is adjusted quickly, that is, the above output voltage adjustment method can change the output voltage value of the voltage conversion circuit from the current output voltage value to the required output voltage value in a short time, and stabilize it near the required output voltage value.

[0042] in, Figure 1 The steps S100 and S200 shown can be executed simultaneously or successively, and the present application is not limited thereto, as long as the regulated voltage value and the maximum output voltage value of the voltage conversion circuit are finally determined.

[0043] Please also read Figure 2 , Figure 2 for Figure 1 A sub-flow chart of step S300 in FIG. Figure 1 , Figure 2 As shown, step S300: adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value, may specifically include:

[0044] Step S310: If the regulated voltage value is less than or equal to the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the regulated voltage value.

[0045] Specifically, when the regulated voltage value is less than or equal to the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value will not cause damage to the voltage conversion circuit, thereby controlling the output voltage value of the regulated voltage conversion circuit to be the actually required regulated voltage value.

[0046] And, step S320: if the regulated voltage value is greater than the maximum output voltage value, control the output voltage value of the regulated voltage conversion circuit to be the maximum output voltage value.

[0047] Specifically, when the regulated voltage value is greater than the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to the regulated voltage value may cause damage to the voltage conversion circuit, so that the output voltage value of the regulated voltage conversion circuit is controlled to be only the maximum output voltage value, thereby providing the required output voltage value as much as possible while avoiding damage to the voltage conversion circuit.

[0048] Therefore, the above-mentioned output voltage regulation method in the present application can control the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value, thereby performing corresponding protection on the voltage conversion circuit.

[0049] Please also read Figure 3 , Figure 3 for Figure 2 A sub-flow chart of steps S310 to S320 in FIG. The voltage conversion circuit includes a switch module, and the voltage conversion circuit is used to convert an input voltage value into an output voltage value; wherein, Figure 2 , Figure 3 As shown, step S310: if the regulated voltage value is less than or equal to the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value may specifically include:

[0050] Step S311: if the regulated voltage value is less than or equal to the maximum output voltage value, the on-duty ratio of the regulated switch module is controlled to be the ratio of the regulated voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value.

[0051] And, step S320: if the regulated voltage value is greater than the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to be the maximum output voltage value, may specifically include:

[0052] Step S321: if the regulated voltage value is greater than the maximum output voltage value, the on-duty ratio of the regulated switch module is controlled to be the ratio of the maximum output voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the maximum output voltage value.

[0053] Therefore, the above-mentioned output voltage regulation method in the present application, when the voltage conversion circuit includes a switching module, and the voltage conversion circuit is used to convert the input voltage value into an output voltage value, that is, when the voltage conversion circuit is a switching type voltage conversion circuit, according to the relationship between the regulated voltage value and the maximum output voltage value, the on-duty cycle of the regulated switching module is controlled to be the ratio of the regulated voltage value or the maximum output voltage value to the input voltage value, so as to achieve the output voltage value of the regulated voltage conversion circuit being controlled to be the regulated voltage value or the maximum output voltage value.

[0054] Specifically, in a switching type voltage conversion circuit, the output voltage value of the voltage conversion circuit can be adjusted by controlling the on-duty cycle of the adjusting switch module. Since the input voltage value of the voltage conversion circuit does not change, it is only necessary to control the ratio of the required output voltage value to the input voltage value to control the on-duty cycle of the adjusting switch module.

[0055] In one or more embodiments, the input voltage value and the output voltage value of the voltage conversion circuit are both DC voltage values.

[0056] Please also read Figure 4 , Figure 4 for Figure 1 A sub-flow chart of step S200 in FIG. Figure 1 , Figure 4 As shown, step S200: detecting the current in the voltage conversion circuit to obtain the detected current value of the voltage conversion circuit, and determining the maximum output voltage value of the voltage conversion circuit according to the detected current value, which may specifically include:

[0057] Step S210: Detect the current in the voltage conversion circuit to obtain a detected current value of the voltage conversion circuit, and determine the maximum output current value of the voltage conversion circuit according to the detected current value.

[0058] Among them, step S210 may include: detecting the current in the voltage conversion circuit to obtain the maximum value of the detection current of the voltage conversion circuit, and the maximum value of the detection current is the maximum output current value of the voltage conversion circuit; it may also include: detecting the current in the voltage conversion circuit to obtain the average value of the detection current of the voltage conversion circuit, and the average value of the detection current is the maximum output current value of the voltage conversion circuit; it may also include: detecting the current in the voltage conversion circuit to obtain the detection current change rate, and calculating the maximum output current value of the voltage conversion circuit according to the detection current change rate.

[0059] It should be noted that the maximum value of the detected current is often greater than the average value of the detected current, and the maximum output current value of the voltage conversion circuit can only be estimated based on the detection current change rate. Therefore, the current in the voltage conversion circuit can be detected to obtain one or more of the maximum value of the detected current, the average value of the detected current, and the change rate of the detected current of the voltage conversion circuit, and then the maximum output current value of the voltage conversion circuit can be determined based on one or more of the maximum value of the detected current, the average value of the detected current, and the change rate of the detected current. In this way, a more accurate maximum output current value of the voltage conversion circuit can be obtained by combining multiple values.

[0060] Step S220: Determine the maximum output voltage value of the voltage conversion circuit at least according to the maximum output current value of the voltage conversion circuit.

[0061] Among them, step S220 may include: determining the maximum output voltage value of the voltage conversion circuit based on the correspondence between the maximum output current value and the maximum output voltage value of the voltage conversion circuit; when the voltage conversion circuit has an equivalent impedance value, it may also include: determining the maximum output voltage value of the voltage conversion circuit based on the maximum output current value and the equivalent impedance value of the voltage conversion circuit.

[0062] It should be noted that, in order to effectively protect the voltage conversion circuit, the maximum output current value determined may have an error, therefore, the maximum output voltage value of the voltage conversion circuit may not be the product of the maximum output current value and the equivalent impedance value. For example, the maximum output voltage value of the voltage conversion circuit may be 70% of the product of the maximum output current value and the equivalent impedance value.

[0063] Therefore, the above-mentioned output voltage regulation method in the present application obtains the detection current value of the voltage conversion circuit by detecting the current in the voltage conversion circuit, and determines the maximum output current value of the voltage conversion circuit based on the detection current value, and then can determine the maximum output voltage value of the voltage conversion circuit at least based on the maximum output current value of the voltage conversion circuit.

[0064] Furthermore, when the voltage conversion circuit includes an inductor module, since the current in the inductor module fluctuates violently, it is necessary to protect the inductor module of the voltage conversion circuit. Therefore, in the above steps, the current in the voltage conversion circuit is detected to obtain the detected current value of the voltage conversion circuit, and then the maximum current value and the maximum output voltage value of the voltage conversion circuit are determined. It can be that the current in the inductor module is detected to obtain the detected current value of the inductor module, and then the maximum current value and the maximum output voltage value of the inductor module are determined, so as to protect the inductor module.

[0065] Please also read Figure 5 , Figure 5 for Figure 1 A sub-flow chart of step S100 in FIG. Figure 1 , Figure 5 As shown, step S100: determining the adjustment voltage value according to the preset voltage value and the current output voltage value of the voltage conversion circuit, which may specifically include:

[0066] Step S110: performing a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value.

[0067] It should be noted that the proportional differential operation can reduce overshoot and overcome oscillation, thereby preventing the obtained regulated voltage value from exceeding the required output voltage value too much and preventing continuous oscillation around the required output voltage value.

[0068] Step S120 : performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensated voltage value.

[0069] Step S130: performing an addition operation on the proportional differential voltage value, the feedforward voltage value and the compensation voltage value to obtain an adjustment voltage value.

[0070] Therefore, the above-mentioned output voltage regulation method in the present application, for the step of adjusting the voltage value according to the preset voltage value and the current output voltage value of the voltage conversion circuit, can respectively perform a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit, perform a feedforward operation on the preset voltage value, and perform a compensation operation on the preset voltage value, thereby correspondingly obtaining a proportional differential voltage value, a feedforward voltage value, and a compensation voltage value, and then can perform an addition operation on the proportional differential voltage value, the feedforward voltage value, and the compensation voltage value to obtain the adjusted voltage value.

[0071] In particular, the feedforward operation can be performed only according to the preset voltage value, while the compensation operation is not only based on the preset voltage value, but also related to the current output voltage value of the voltage conversion circuit, and the proportional differential operation needs to perform proportional and differential operations on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit. Therefore, in terms of operation speed, the feedforward operation has the fastest operation speed, the compensation operation has the second fastest operation speed, and the proportional differential operation has the slowest operation speed, but in terms of robustness, the proportional differential operation has the highest robustness, the compensation operation has the second fastest robustness, and the feedforward operation has the lowest robustness, where robustness can also be understood as calculation accuracy.

[0072] in, Figure 5 The steps S110 and S120 shown can be executed simultaneously or sequentially, and the present application is not limited thereto, as long as the proportional differential voltage value, the feedforward voltage value and the compensation voltage value are finally obtained.

[0073] Please also read Figure 6 , Figure 6 for Figure 5 A sub-flow chart of step S110 in FIG. Figure 5 , Figure 6 As shown, step S110: performing a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value, which may specifically include:

[0074] Step S111: performing a subtraction operation on the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a difference voltage value.

[0075] Step S112: performing proportional and differential operations on the differential voltage value to obtain a proportional voltage value and a differential voltage value respectively.

[0076] The proportional and differential operations correspond to proportional coefficients and differential coefficients, and the proportional coefficients and differential coefficients can be fixed values ​​or variable values.

[0077] Step S113: performing an addition operation on the proportional voltage value and the differential voltage value to obtain a proportional differential voltage value.

[0078] Therefore, for the proportional differential operation, the above-mentioned output voltage regulation method in the present application can first subtract the preset voltage value from the current output voltage value of the voltage conversion circuit to obtain the differential voltage value, and then perform proportional and differential operations on the differential voltage value respectively and add the proportional voltage value and the differential voltage value to obtain the proportional voltage value and the differential voltage value respectively, and then add the proportional voltage value and the differential voltage value to obtain the proportional differential voltage value.

[0079] Please also read Figure 7 , Figure 7 for Figure 5 A sub-flow chart of step S120 in the voltage conversion circuit includes an inductor module and a capacitor module, and the voltage conversion circuit is used to connect to the load so that the voltage conversion circuit has an equivalent inductance value, an equivalent capacitance value and an equivalent impedance value; wherein, Figure 5 , Figure 7 As shown, step S120: performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensation voltage value, which may specifically include:

[0080] Step S121: obtaining a preset feedforward operation relationship between a preset voltage value and a feedforward voltage value, wherein the preset feedforward operation relationship is related to an equivalent inductance value, an equivalent capacitance value, and an equivalent impedance value of the voltage conversion circuit.

[0081] It should be noted that the feedforward operation has a faster operation speed, mainly because the preset relationship of the feedforward operation can be related only to the equivalent inductance value, equivalent capacitance value and equivalent impedance value of the voltage conversion circuit, but not to the current output voltage value of the voltage conversion circuit. When the equivalent impedance value does not change, the preset relationship of the feedforward operation does not change either.

[0082] The equivalent impedance value may be the sum of the impedance value of the load and the impedance values ​​of other impedance devices.

[0083] Step S122: Based on the preset relationship of the feedforward operation, a feedforward operation is performed on the preset voltage value to obtain a feedforward voltage value.

[0084] Therefore, the above-mentioned output voltage regulation method in the present application can obtain a feedforward voltage value corresponding to a preset voltage value according to the obtained feedforward operation preset relationship for the feedforward operation for the feedforward operation.

[0085] Please also read Figure 8 , Figure 8 for Figure 5 Another sub-flow chart of step S120 in FIG. Figure 5 , Figure 8 As shown, step S120: performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensation voltage value, which may specifically include:

[0086] Step S123: obtaining a preset compensation operation relationship between a preset voltage value and a compensation voltage value, wherein the preset compensation operation relationship is related to an equivalent inductance value, an equivalent capacitance value, an equivalent impedance value of the voltage conversion circuit and a current output voltage value.

[0087] Step S124: performing a compensation operation on the preset voltage value based on the preset compensation operation relationship to obtain a compensated voltage value.

[0088] It should be noted that, in order to further speed up the response speed of the voltage conversion circuit, a compensation operation may be performed on the preset voltage value according to the current output voltage value of the voltage conversion circuit to obtain a compensation voltage value.

[0089] Therefore, the above-mentioned output voltage regulation method in the present application can obtain a compensation voltage value corresponding to a preset voltage value according to the obtained preset relationship of the compensation operation for the compensation operation.

[0090] The output voltage regulation method of the present application, through the above steps, can quickly and accurately determine the regulated voltage value through proportional differential operation, feedforward operation and compensation operation, thereby quickly adjusting the output voltage value of the voltage conversion circuit, and can also perform corresponding protection on the voltage conversion circuit.

[0091] See also Fig. 9 , Fig. 9 : is a block diagram of an output voltage regulating device in an embodiment of the present application. The present application also provides an output voltage regulating device 10, the output voltage regulating device 10 uses the above-mentioned output voltage regulating method to regulate an output voltage value U1 of a voltage conversion circuit 20; wherein, Fig. 9As shown, the output voltage regulating device 10 includes: a first determining unit 100, used to determine the regulating voltage value Uc according to the preset voltage value U* and the current output voltage value U1 of the voltage conversion circuit 20; a second determining unit 200, used to detect the current in the voltage conversion circuit 20 to obtain the detection current value I1 of the voltage conversion circuit 20, and determine the maximum output voltage value Um of the voltage conversion circuit 20 according to the detection current value I1; a control unit 300, used to adjust the output voltage value U1 of the voltage conversion circuit 20 to the regulating voltage value Uc or the maximum output voltage value Um according to the relationship between the regulating voltage value Uc and the maximum output voltage value Um.

[0092] Please refer again Figure 1 .like Figure 1 As shown, the output voltage regulation method includes:

[0093] Step S100: determining an adjustment voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit.

[0094] Step S200: Detect the current in the voltage conversion circuit to obtain the detected current value of the voltage conversion circuit, and determine the maximum output voltage value of the voltage conversion circuit according to the detected current value.

[0095] Step S300: adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

[0096] Among them, more specific steps of the output voltage regulation method can refer to the relevant content of the output voltage regulation method in any of the above embodiments, which will not be repeated here.

[0097] In one or more embodiments, the control unit 300 is also used to control the output voltage value U1 of the regulated voltage conversion circuit 20 to be the regulated voltage value Uc if the regulated voltage value Uc is less than or equal to the maximum output voltage value Um; if the regulated voltage value Uc is greater than the maximum output voltage value Um, control the output voltage value U1 of the regulated voltage conversion circuit 20 to be the maximum output voltage value Um.

[0098] Please also read Fig.10 , Fig.10 FIG. 1 is a block diagram of an output voltage regulating device in another embodiment of the present application. Fig.10As shown, the input port of the voltage conversion circuit 20 is used to input an input voltage value Uin, and the voltage conversion circuit 20 can be used to connect with the load 40 to convert the input voltage value Uin into an output voltage value U1, and output it to the load 40. The voltage conversion circuit 20 may include a switch module 23, an inductor module 21, and a capacitor module 22, so that the voltage conversion circuit 20 has an equivalent inductance value, an equivalent capacitance value, and an equivalent impedance value. Among them, the input port may include an input positive electrode IN+ and an input negative electrode IN-, the switch module 23 may include a first switch S1, the inductor module 21 may include a first inductor L1, and the capacitor module 22 may include a first capacitor C1. The first switch S1 and the first inductor L1 are sequentially connected in series between the input positive electrode IN+ and one end of the load 40, and the other end of the load 40 and the input negative electrode IN- are both grounded GND, one end of the first capacitor C1 is connected to the connection point between the first inductor L1 and one end of the load 40, and the other end of the first capacitor C1 is grounded GND.

[0099] In one or more embodiments, the voltage conversion circuit 20 may further include a diode module 24, wherein the diode module 24 may include a first diode D1, a cathode of the first diode D1 is connected to a connection point between the first switch S1 and the first inductor L1, and an anode of the first diode D1 is grounded.

[0100] It should be noted that if Fig.10 The voltage conversion circuit 20 shown is only for illustration. As long as the voltage conversion circuit 20 has an equivalent inductance value, an equivalent capacitance value, and an equivalent impedance value, it can convert the input voltage value Uin into the output voltage value U1.

[0101] like Fig.10As shown, the first determination unit 100 may include a proportional operation module 110, a differential operation module 120, a feedforward operation module 130, a compensation operation module 140, a first operator 150, a second operator 160 and a third operator 170, and the second determination unit 200 may include a maximum operation module 210. Among them, the first operator 150 is used to perform a subtraction operation on the preset voltage value U* and the current output voltage value U1 of the voltage conversion circuit 20 to obtain the differential voltage value Us; the proportional operation module 110 is used to perform a proportional operation on the differential voltage value Us to obtain the proportional voltage value Up; the differential operation module 120 is used to perform a differential operation on the differential voltage value Us to obtain the differential voltage value Ud; the second operator 160 is used to perform an addition operation on the proportional voltage value Up and the differential voltage value Ud to obtain the proportional differential voltage value UpdUd; the feedforward operation module 130 is used to obtain the feedforward operation preset relationship between the preset voltage value U* and the feedforward voltage value Uf, and based on the feedforward operation preset relationship, perform a feedforward operation on the preset voltage value U* to obtain the feedforward voltage value Uf, wherein the feedforward operation preset relationship is related to the equivalent inductance value, equivalent capacitance value and equivalent impedance value of the voltage conversion circuit 20; the compensation operation Module 140 is used to obtain a preset compensation operation relationship between a preset voltage value U* and a compensation voltage value Ue, and based on the preset compensation operation relationship, performs a compensation operation on the preset voltage value U* to obtain a compensation voltage value Ue, wherein the preset compensation operation relationship is related to the equivalent inductance value, equivalent capacitance value, equivalent impedance value and the current output voltage value U1 of the voltage conversion circuit 20; the third operator 170 is used to perform an addition operation on the proportional differential voltage value UpdUd, the feedforward voltage value Uf and the compensation voltage value Ue to obtain the adjustment voltage value Uc; the maximum value operation module 210 is used to detect the current in the voltage conversion circuit 20 to obtain the detection circuit value of the voltage conversion circuit 20, and determine the maximum output current value of the voltage conversion circuit 20 according to the detection current value I1, and then determine the maximum output voltage value Um of the voltage conversion circuit 20 at least according to the maximum output current value of the voltage conversion circuit 20.

[0102] In one or more embodiments, the output voltage value U1 of the voltage conversion circuit 20 can also be obtained through a voltage sensor (not shown in the figure), and the current in the voltage conversion circuit 20 can be detected by a current sensor (not shown in the figure) to obtain the detection current value I1 of the voltage conversion circuit 20, so that the maximum value calculation module 210 can be used only to determine the maximum output current value of the voltage conversion circuit 20 based on the detection current value I1, and then determine the maximum output voltage value Um of the voltage conversion circuit 20 at least based on the maximum output current value of the voltage conversion circuit 20.

[0103] In one or more embodiments, the control unit 300 is used to output a preset voltage value U* to the first operator 150, and receive the adjustment voltage value Uc output by the third operator 170 and the maximum output voltage value Um output by the maximum value operation module 210. The control unit 300 is also used to control the on-duty cycle of the adjustment switch module 23 to be the ratio of the adjustment voltage value Uc to the input voltage value Uin if the adjustment voltage value Uc is less than or equal to the maximum output voltage value Um, so as to control the output voltage value U1 of the adjustment voltage conversion circuit 20 to be the adjustment voltage value Uc; if the adjustment voltage value Uc is greater than the maximum output voltage value Um, control the on-duty cycle of the adjustment switch module 23 to be the ratio of the maximum output voltage value Um to the input voltage value Uin, so as to control the output voltage value U1 of the adjustment voltage conversion circuit 20 to be the maximum output voltage value Um. Fig.10 As shown, the control unit 300 controls the on or off of the first switch S1 by outputting a control signal CS to control the on duty cycle of the adjustment switch module 23 .

[0104] In one or more embodiments, the control unit 300 can be a general-purpose processor such as a central processing unit (CPU), or a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate logic devices, transistor logic devices and other logic control devices, or a microprocessor such as a micro control unit (MCU).

[0105] The steps of the output voltage regulating method and the functional operations performed by the output voltage regulating device 10 correspond to each other, and the relevant contents can be referenced to each other.

[0106] The output voltage regulation method and output voltage regulation device 10 of the present application, through the above steps and structures, can quickly and accurately determine the regulated voltage value Uc through proportional differential operation, feedforward operation and compensation operation, and then quickly adjust the output voltage value U1 of the voltage conversion circuit 20, and can also perform corresponding protection on the voltage conversion circuit 20.

[0107] See also Fig.11 , Fig.11 FIG. 1 is a schematic diagram of an electronic device in an embodiment of the present application. Fig.11As shown, the present application also provides an electronic device 1000 , which includes a voltage conversion circuit 20 and the above-mentioned output voltage regulating device 10 .

[0108] Please refer again Fig. 9 .like Fig. 9 As shown, the output voltage regulating device 10 includes: a first determining unit 100, used to determine the regulating voltage value Uc according to the preset voltage value U* and the current output voltage value U1 of the voltage conversion circuit 20; a second determining unit 200, used to detect the current in the voltage conversion circuit 20 to obtain the detection current value I1 of the voltage conversion circuit 20, and determine the maximum output voltage value Um of the voltage conversion circuit 20 according to the detection current value I1; a control unit 300, used to adjust the output voltage value U1 of the voltage conversion circuit 20 to the regulating voltage value Uc or the maximum output voltage value Um according to the relationship between the regulating voltage value Uc and the maximum output voltage value Um.

[0109] The more specific structure of the output voltage regulating device 10 can refer to the relevant content of the output voltage regulating device 10 in any of the aforementioned embodiments, which will not be described in detail here.

[0110] like Fig.11 As shown, the voltage conversion circuit 20 can be used to connect with a load 40 .

[0111] In one or more embodiments, the electronic device 1000 may be a radio frequency power supply device, and may further include a radio frequency power amplifier and an impedance matcher between the voltage conversion circuit 20 and the load 40 , so as to output the required radio frequency power to the load 40 by adjusting the output voltage value U1 of the voltage conversion circuit 20 .

[0112] The output voltage regulation method, output voltage regulation device 10 and electronic device 1000 of the present application, through the above steps and structures, can quickly and accurately determine the regulated voltage value Uc through proportional differential operation, feedforward operation and compensation operation, and then quickly adjust the output voltage value U1 of the voltage conversion circuit 20, and can also perform corresponding protection on the voltage conversion circuit 20 to provide the required voltage value to the electronic device 1000.

[0113] The present application also provides a computer-readable storage medium, in which a computer program is stored. When the computer program runs on a computer or a processor, the output voltage regulation method of any of the aforementioned embodiments is implemented.

[0114] In the multiple embodiments provided in the present application, it should be understood that the disclosed methods, devices and equipment can be implemented in other ways. For example, the device embodiments described above are only schematic; for example, the division of units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0115] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0116] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0117] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform some steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0118] The above description is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application; in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An output voltage regulation method, applied to a voltage conversion circuit, for regulating the output voltage value of the voltage conversion circuit, characterized in that: The output voltage regulation method comprises: Determining an adjustment voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit; Detecting the current in the voltage conversion circuit to obtain a detection current value of the voltage conversion circuit, and determining the maximum output voltage value of the voltage conversion circuit according to the detection current value; The output voltage value of the voltage conversion circuit is adjusted to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

2. The output voltage regulation method according to claim 1, characterized in that: The step of adjusting the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value comprises: If the regulated voltage value is less than or equal to the maximum output voltage value, controlling the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value; and If the regulated voltage value is greater than the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the maximum output voltage value.

3. The output voltage regulation method according to claim 1, characterized in that: The step of determining the adjusted voltage value according to the preset voltage value and the current output voltage value of the voltage conversion circuit comprises: Performing a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value; Performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensation voltage value; The proportional differential voltage value, the feedforward voltage value and the compensation voltage value are added to obtain the regulated voltage value.

4. The output voltage regulation method according to claim 3, characterized in that: The step of performing a proportional differential operation on the difference between the preset voltage value and the current output voltage value of the voltage conversion circuit to obtain a proportional differential voltage value includes: Subtracting the preset voltage value from the current output voltage value of the voltage conversion circuit to obtain a differential voltage value; Performing proportional and differential operations on the differential voltage value respectively to obtain a proportional voltage value and a differential voltage value correspondingly; The proportional voltage value and the differential voltage value are added to obtain the proportional differential voltage value.

5. The output voltage regulation method according to claim 3, characterized in that: The voltage conversion circuit includes an inductor module and a capacitor module, and the voltage conversion circuit is used to connect to a load so that the voltage conversion circuit has an equivalent inductance value, an equivalent capacitance value and an equivalent impedance value; The performing of a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and the performing of a compensation operation on the preset voltage value to obtain a compensation voltage value, include: Obtaining a feedforward operation preset relationship between a preset voltage value and a feedforward voltage value, wherein the feedforward operation preset relationship is related to an equivalent inductance value, an equivalent capacitance value, and an equivalent impedance value of a voltage conversion circuit; Based on the preset relationship of the feedforward operation, a feedforward operation is performed on the preset voltage value to obtain a feedforward voltage value.

6. The output voltage regulation method according to claim 5, characterized in that: The method of performing a feedforward operation on the preset voltage value to obtain a feedforward voltage value, and performing a compensation operation on the preset voltage value to obtain a compensation voltage value, further includes: Obtaining a preset compensation operation relationship between a preset voltage value and a compensation voltage value, wherein the preset compensation operation relationship is related to an equivalent inductance value, an equivalent capacitance value, an equivalent impedance value of the voltage conversion circuit and a current output voltage value; Based on the preset compensation operation relationship, a compensation operation is performed on the preset voltage value to obtain a compensated voltage value.

7. The output voltage regulation method according to claim 1, characterized in that: The detecting the current in the voltage conversion circuit to obtain the detected current value of the voltage conversion circuit, and determining the maximum output voltage value of the voltage conversion circuit according to the detected current value, comprises: Detecting the current in the voltage conversion circuit to obtain a detection current value of the voltage conversion circuit, and determining the maximum output current value of the voltage conversion circuit according to the detection current value; The maximum output voltage value of the voltage conversion circuit is determined based on at least the maximum output current value of the voltage conversion circuit.

8. The output voltage regulation method according to claim 2, characterized in that: The voltage conversion circuit comprises a switch module, and the voltage conversion circuit is used to convert the input voltage value into the output voltage value; Wherein, if the regulated voltage value is less than or equal to the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the regulated voltage value; and if the regulated voltage value is greater than the maximum output voltage value, the output voltage value of the regulated voltage conversion circuit is controlled to be the maximum output voltage value, including: If the regulated voltage value is less than or equal to the maximum output voltage value, the on-duty ratio of the regulated switch module is controlled to be the ratio of the regulated voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the regulated voltage value; and If the regulated voltage value is greater than the maximum output voltage value, the conduction duty cycle of the regulated switch module is controlled to be the ratio of the maximum output voltage value to the input voltage value, so as to control the output voltage value of the regulated voltage conversion circuit to be the maximum output voltage value.

9. An output voltage regulating device, characterized in that: The output voltage regulating device uses the output voltage regulating method according to any one of claims 1 to 8 to regulate the output voltage value of a voltage conversion circuit; Wherein, the output voltage regulating device comprises: A first determining unit, configured to determine an adjustment voltage value according to a preset voltage value and a current output voltage value of the voltage conversion circuit; a second determining unit, configured to detect the current in the voltage conversion circuit to obtain a detected current value of the voltage conversion circuit, and determine a maximum output voltage value of the voltage conversion circuit according to the detected current value; A control unit is used to adjust the output voltage value of the voltage conversion circuit to the regulated voltage value or the maximum output voltage value according to the relationship between the regulated voltage value and the maximum output voltage value.

10. An electronic device, characterized in that: It comprises a voltage conversion circuit and the output voltage regulating device as claimed in claim 9.

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