Circuit control method, device, storage medium and program product

Abstract

The application relates to a circuit control method and device, a storage medium and a program product. The method comprises the following steps: acquiring the power of a voltage conversion circuit, and controlling the working mode of a charge-discharge circuit according to a target control mode corresponding to the power of the voltage conversion circuit. Different control modes can be adopted to control the working of the charge-discharge circuit under the condition of different powers of the voltage conversion circuit, so that the harmonic test standards of different classifications can be met under the condition that the capacitance capacity used for energy storage in the power supply circuit is small, and thus the volume of the capacitor in the power supply circuit can be reduced.

Description

Technical Field

[0001] This application relates to the field of circuit technology, and in particular to a circuit control method, apparatus, storage medium, and program product. Background Technology

[0002] Normally, the output power of the rectifier circuit in a power supply circuit varies with time, but the input power of the voltage conversion circuit in the power supply circuit is usually relatively constant. Therefore, a charging and discharging circuit that can store and release energy is needed between the rectifier circuit and the voltage conversion circuit.

[0003] However, the control method of the power supply circuit in the related technology has the problem of large power supply circuit size. Summary of the Invention

[0004] Therefore, it is necessary to provide a circuit control method, device, storage medium, and program product to address the aforementioned technical problems.

[0005] In a first aspect, this application provides a circuit control method for controlling a power supply circuit, the power supply circuit including a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively, and the method includes:

[0006] Obtain the power of the voltage conversion circuit;

[0007] The charging and discharging circuit is controlled to operate according to the target control mode corresponding to the power of the voltage conversion circuit.

[0008] Secondly, this application also provides a circuit control device for controlling a power supply circuit, the power supply circuit including a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively, and the device includes:

[0009] An acquisition module is used to acquire the power of the voltage conversion circuit;

[0010] The control module is used to control the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit.

[0011] Thirdly, this application also provides a power supply device, the power supply device comprising: a power supply circuit and a control circuit; wherein the control circuit is used to perform the method as described in any of the first aspects above;

[0012] The power supply circuit includes a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively.

[0013] Fourthly, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method described in the first aspect.

[0014] Fifthly, this application also provides a computer program product comprising a computer program that, when executed by a processor, implements the steps of the method described in the first aspect.

[0015] The aforementioned circuit control method, device, storage medium, and program product, by acquiring the power of the voltage conversion circuit and controlling the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit, can achieve the following: for different power levels of the voltage conversion circuit, the corresponding control mode can be used to control the operation of the charging and discharging circuit. This allows the power supply circuit to meet different harmonic testing standards even when the capacity of the capacitor used for energy storage is small, thereby reducing the size of the capacitor in the power supply circuit. Attached Figure Description

[0016] Figure 1 A schematic diagram of the peak value standard of harmonic current provided in the embodiments of this application;

[0017] Figure 2 This is a schematic diagram of the power supply circuit provided in one embodiment of this application;

[0018] Figure 3 This is a schematic diagram of the charging and discharging circuit provided in one embodiment of this application;

[0019] Figure 4 A schematic flowchart of a circuit control method provided in one embodiment of this application;

[0020] Figure 5 A schematic diagram of the current in the discharge state of the charging and discharging circuit provided in the embodiments of this application;

[0021] Figure 6 A schematic diagram of the current in the charging state of the charging and discharging circuit provided in the embodiments of this application;

[0022] Figure 7 A schematic flowchart of a circuit control method provided in another embodiment of this application;

[0023] Figure 8 This is a schematic flowchart of a method for controlling the operation of a charging and discharging circuit according to a target control mode, provided in one embodiment of this application.

[0024] Figure 9 A schematic flowchart of a circuit control method provided in another embodiment of this application;

[0025] Figure 10 A schematic diagram illustrating the result of a first control mode provided in one embodiment of this application;

[0026] Figure 11 This is a schematic diagram of the circuit control device in one embodiment of this application;

[0027] Figure 12 This is a schematic diagram of the power supply device in one embodiment of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0029] The circuit control method, device, storage medium, and program product provided in the embodiments of this application can be applied to power circuit control application scenarios, and of course, they can also be applied to other scenarios. This application does not limit them.

[0030] The power supply circuits involved in the embodiments of this application can be applied to electronic devices. Exemplarily, the electronic devices involved in the embodiments of this application may include, but are not limited to: power adapters, cookie chargers, power banks, mobile phones, laptops, tablets, smartwatches, smart bracelets, smart glasses, robot vacuums, wireless headphones, Bluetooth speakers, electric toothbrushes, rechargeable wireless mice, or desktop computers.

[0031] For ease of understanding, the relevant content of harmonic testing is first introduced in the embodiments of this application.

[0032] With the development of electronic technology, electrical equipment is becoming increasingly widespread and used extensively in production and daily life. However, electrical equipment generates harmonic pollution during operation, placing a significant burden on the power system. Therefore, harmonic testing is an important testing item in the power system. It is crucial for ensuring the stable operation and safety of electrical equipment and the power system. It can effectively test and evaluate the harmonics generated by electrical equipment, helping the power system maintain stability and safety.

[0033] Harmonic testing standards (such as GB17625-1) are a set of regulations and standards used for harmonic testing to assess the impact of harmonics generated by electrical equipment on power systems and to clearly measure the electromagnetic compatibility of power systems. In order to specify harmonic current limits, harmonic testing standards propose the following equipment classifications.

[0034] 1) Category A:

[0035] —A balanced three-phase system;

[0036] —Household appliances, excluding equipment listed in Category D;

[0037] —Tools, excluding portable tools;

[0038] — Incandescent lamp dimmer;

[0039] —Audio equipment.

[0040] 2) Category B:

[0041] Portable tools;

[0042] —Arc welding equipment that is not classified as specialized equipment.

[0043] 3) Category C:

[0044] Lighting equipment.

[0045] 4) Category D:

[0046] According to the requirements of 6.2.2, the following equipment with a power of not more than 600W is specified:

[0047] —Personal computers and personal computer monitors;

[0048] —Television receiver.

[0049] It should be noted that equipment not specified as Class B, Class C, or Class D should be considered as Class A equipment.

[0050] Note 1: Equipment that has a significant impact on the power supply system may be reclassified in future versions of this section, taking into account factors such as:

[0051] —The number of devices in use;

[0052] —Use duration;

[0053] —Simultaneous use;

[0054] —Power consumed;

[0055] —Harmonic spectrum, including phase.

[0056] Note 2: Taking into account the factors listed in Note 1, the Class D limits are retained for equipment that has a significant impact on the public power supply system.

[0057] It should be noted that, under normal circumstances, harmonic testing is not required when the power is less than 75W.

[0058] It should be understood that when a charger (or power adapter, etc.) charges a "personal computer and personal computer monitor," the charger is classified as a Class D device; when a charger charges a "mobile phone," the charger does not meet the specifications of Classes B, C, and D, and therefore belongs to Class A devices. For power ratings of 100W to 300W, the harmonic current limits for Class D devices are more stringent than those for Class A devices.

[0059] Figure 1 A schematic diagram of the peak harmonic current standard provided in the embodiments of this application is shown below. Figure 1 As shown, the peak harmonic current standard is the same for different power levels of Class A devices. For example, when a charger charges a "mobile phone", because the battery capacity of a mobile phone is small, it can usually be fully charged quickly at 300W power. Therefore, the 300W working time of the mobile phone charger is very short, and it usually ends before reaching a quasi-steady state.

[0060] like Figure 1 As shown, the peak harmonic current standards differ for different power ratings of Class D devices, with the standards becoming more stringent as the power decreases. For example, when a charger is charging a laptop, the 100W power rating is commonly used for charging gaming laptops due to their large battery capacity. Therefore, the charger may operate at 100W continuously for several hours or even indefinitely. In this case, the charger's peak harmonic current must meet the peak harmonic current standard for a 100W power rating in Class D devices.

[0061] Normally, the output power of the rectifier circuit in a power supply circuit varies with time, but the input power of the voltage conversion circuit in the power supply circuit is usually relatively constant. Therefore, a charging and discharging circuit that can store and release energy is needed between the rectifier circuit and the voltage conversion circuit to perform power factor correction (PFC), so that the input voltage and input current of the power supply circuit (or the output voltage and output current of the rectifier circuit) are as in phase as possible, and the generation of higher harmonics is minimized.

[0062] In related technologies, the power supply circuits employ standard control methods when applied to different types of equipment. To meet the harmonic testing standards for these different categories, the capacitors used for energy storage in the power supply circuits of these technologies are relatively large (resulting in large capacitor volumes). Therefore, these technologies suffer from the problem of large power supply circuit volumes.

[0063] To address the issue of large power supply circuit size in related technologies, this application proposes a method for controlling the operation of the charging and discharging circuit based on a target control mode corresponding to the power of the voltage conversion circuit. This allows for the use of corresponding control modes to control the operation of the charging and discharging circuit for different voltage conversion circuit power levels. Consequently, the capacity of the capacitor used for energy storage in the power supply circuit does not need to be large to meet different harmonic testing standards, thereby reducing the size of the capacitor in the power supply circuit.

[0064] For ease of understanding, the relevant content of the power supply circuit is further described in the embodiments of this application.

[0065] Figure 2 This is a schematic diagram of the power supply circuit provided in one embodiment of this application, as shown below. Figure 2 As shown, the power supply circuit in this embodiment may include: a rectifier circuit 10, a charging / discharging circuit 11, and a voltage conversion circuit 12. The rectifier circuit 10 and the voltage conversion circuit 12 are connected in series, and the charging / discharging circuit 11 is connected in parallel with both the rectifier circuit 10 and the voltage conversion circuit 12 (i.e., the charging / discharging circuit 11 is connected in parallel between the rectifier circuit 10 and the voltage conversion circuit 12).

[0066] The rectifier circuit 10 in this embodiment can be used to convert the input AC power into DC power; the voltage conversion circuit 12 can be used to transform the output voltage of the rectifier circuit 10 to obtain the desired output target voltage. Exemplarily, the voltage conversion circuit 12 in this embodiment can include, but is not limited to, DC-DC (Direct Current to Direct Current, DCDC).

[0067] The charging and discharging circuit 11 in this embodiment can adjust its operating mode according to the output power of the rectifier circuit 10 and the input power of the voltage conversion circuit 12; wherein, the operating mode can include: charging mode, discharging mode and non-operating mode (i.e., not in charging or discharging state). It should be understood that the charging and discharging circuit 11 can be controlled by the control circuit ( Figure 2 Adjust the working status mode under the control of (not shown in the image).

[0068] For example, in the charging state mode, the charging and discharging circuit 11 can be charged according to the output current of the rectifier circuit 10, that is, the energy storage circuit in the charging and discharging circuit 11 stores energy; in the discharging state mode, it can discharge to the voltage conversion circuit 12, that is, the energy storage circuit in the charging and discharging circuit 11 releases energy; in the non-working state mode, it stops working, that is, the energy storage circuit in the charging and discharging circuit 11 is in an open circuit state and thus stops working.

[0069] For example, the charging and discharging circuit 11 in this embodiment can be a bidirectional buck circuit (or a BiBuck circuit). When the charging and discharging circuit 11 is in the charging state mode, it operates in boost mode; when the charging and discharging circuit 11 is in the discharging state mode, it operates in buck mode.

[0070] In this embodiment of the power supply circuit, the charging and discharging circuit 11 is connected in parallel between the rectifier circuit 10 and the voltage conversion circuit 12. The operating mode of the charging and discharging circuit 11 is adjusted according to the output power of the rectifier circuit 10 and the input power of the voltage conversion circuit 12, so that energy flows into the charging and discharging circuit 11 only when energy storage is needed, and energy flows out of the charging and discharging circuit 11 only when energy release is needed. Therefore, only a small portion of the energy in the power supply circuit provided in this embodiment passes through the charging and discharging circuit 11. Compared to the conventional method where the PFC circuit is connected in series between the rectifier circuit and the voltage conversion circuit (where most of the energy in the power supply circuit needs to pass through the PFC circuit), the energy storage capacity requirement of the charging and discharging circuit 11 provided in this embodiment is smaller. Therefore, the volume of the energy storage circuit in the charging and discharging circuit 11 is smaller, resulting in a smaller overall volume of the charging and discharging circuit 11, which helps to reduce the size of the power supply circuit.

[0071] Furthermore, the power supply circuit in this embodiment may further include a decoupling branch 13 connected to the rectifier circuit 10 and the charging / discharging circuit 11, respectively. For example, one end of the decoupling branch 13 is connected to the rectifier circuit 10, and the other end of the decoupling branch 13 is grounded. The decoupling branch 13 can be used to reduce mutual interference between the preceding and following stages of the decoupling branch 13. The preceding stage of the decoupling branch 13 may include the rectifier circuit 10, and the following stage of the decoupling branch 13 may include a voltage conversion circuit 12. Exemplarily, the decoupling branch 13 may include, but is not limited to, the following: Figure 1 The capacitor Cbus is shown.

[0072] It should be noted that, according to Kirchhoff's current law, the output current I of rectifier circuit 10 is... ac The current I in decoupling branch 13 Cbus The current I in the charging and discharging circuit BiBuck The input current I of the voltage conversion circuit power The sum is zero.

[0073] Based on the above embodiments, Figure 3 This is a schematic diagram of the charging and discharging circuit provided in one embodiment of this application, as shown below. Figure 3As shown, the charging and discharging circuit 11 in this embodiment may include: an inductor (or simply inductor) L, a first switch Q1, a second switch Q2, and a capacitor (or simply capacitor) Cbulk. The first switch Q1 and the second switch Q2 may be high-voltage switches; the inductor L may be a high-voltage power inductor; and the capacitor Cbulk may be a high-voltage electrolytic capacitor.

[0074] One end of the inductor L is connected to the rectifier circuit, the first end of the first switch Q1 is connected to the other end of the inductor L and the second end of the second switch Q2, the two ends of the capacitor Cbulk are connected to the second end of the first switch Q1 and the first end of the second switch Q2, and the first end of the second switch Q2 is grounded.

[0075] It should be understood that the control terminals of the first switch Q1 and the second switch Q2 can both be connected to the control circuit ( Figure 3 (Not shown) The circuit is connected so that the control circuit can control the operating mode of the charging and discharging circuit by sending a first control signal to the first switch Q1 and / or a second control signal to the second switch Q2, wherein the first control signal is used to control the on / off state of the first switch Q1 and the second control signal is used to control the on / off state of the second switch Q2. Exemplarily, the control signals (e.g., the first control signal or the second control signal) involved in the embodiments of this application may include, but are not limited to, pulse width modulation (PWM) signals.

[0076] For example, the first switch Q1 and the second switch Q2 in the embodiments of this application can be a high-voltage half-bridge circuit or a high-voltage half-bridge chip. The high-voltage half-bridge chip includes two high-voltage switches and a driving circuit.

[0077] In this embodiment, the energy storage circuit of the charging / discharging circuit 11 may include, but is not limited to, an inductor L and a capacitor Cbulk, which can be used to store energy when the charging / discharging circuit 11 is in a charging state mode and to release energy when the charging / discharging circuit 11 is in a discharging state mode. The current I of the charging / discharging circuit in this embodiment is... BiBuck This may include, but is not limited to, the current of the inductor L (or simply the inductor current).

[0078] The switching transistors involved in the embodiments of this application may include, but are not limited to, metal-oxide-semiconductor field-effect transistors (MOS transistors) or switching transistors fabricated using gallium nitride (GaN) material, such as metal-semiconductor field-effect transistors (MESFETs), heterojunction field-effect transistors (HFETs), or modulation-doped field-effect transistors (MODFETs). It should be understood that... Figure 3 The example shown uses NMOS transistors as the switching transistors.

[0079] Of course, the charging and discharging circuit 11 in this embodiment can also adopt other circuit forms, and this embodiment does not limit it.

[0080] In one embodiment, Figure 4 This is a flowchart illustrating a circuit control method provided in one embodiment of this application. The circuit control method in this embodiment can be used to control a power supply circuit, wherein the power supply circuit may include, but is not limited to, the following: Figure 2 The rectifier circuit, charging / discharging circuit, and voltage conversion circuit shown are illustrated, with the charging / discharging circuit connected in parallel with both the rectifier circuit and the voltage conversion circuit. This application uses the application of a circuit control method to a control circuit as an example for illustration. Figure 4 As shown, the method in this application embodiment may include the following steps:

[0081] Step S401: Obtain the power of the voltage conversion circuit.

[0082] In this step, the control circuit can obtain the power of the voltage conversion circuit, wherein the power of the voltage conversion circuit may include, but is not limited to, the input power of the voltage conversion circuit or the output power of the voltage conversion circuit.

[0083] Step S402: Control the charging and discharging circuit to work according to the target control mode corresponding to the power of the voltage conversion circuit.

[0084] In this step, the control circuit can control the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit. It should be understood that in this embodiment, different target control modes can correspond to different power levels of the voltage conversion circuits.

[0085] In this embodiment, the control circuit can determine a target control mode based on the power of the voltage conversion circuit, and control the charging and discharging circuit to operate according to the target control mode. For example, the target control mode can be used to indicate the method of controlling the operation of the charging and discharging circuit, such as the method of determining the target peak current, and / or adjusting the operating state of the charging and discharging circuit.

[0086] The target peak current in the embodiments of this application may include the target peak current that the charging and discharging circuit needs to achieve in the discharging state (or buck mode) and the target peak current that the charging and discharging circuit needs to achieve in the charging state (or boost mode).

[0087] Figure 5 This is a schematic diagram of the current in the discharge state of the charging and discharging circuit provided in the embodiments of this application, as shown below. Figure 5 As shown, the current I in the charging and discharging circuit during the discharging state is... buck The peak current is positive, and the current I buck The valley current is negative, and the current I buck The average current is positive.

[0088] Figure 6 This is a schematic diagram of the current of the charging and discharging circuit provided in the embodiments of this application during the charging state, as shown below. Figure 6 As shown, the current I in the charging / discharging circuit during the charging state is... boost The peak current is negative, and the current I boost The valley current is positive, and the current I boost The average current is negative.

[0089] Combination Figure 5 and Figure 6 As shown, the current I in the charging and discharging circuit during the discharging state is... buck The peak current and the current I of the charging and discharging circuit in the charging state boost The peak current is in the opposite direction.

[0090] Typically, the peak current of the charging and discharging circuit in this embodiment has both "positive current greater than a preset current threshold" and "negative current greater than a preset current threshold" (greater than 0.5A is considered large) under high power, while the overall average current remains basically unchanged. However, it will adjust under medium power. For example, the preset current threshold can be 0.5A.

[0091] In one possible implementation, the control circuit can use the correspondence between preset power and control mode to select the control mode corresponding to the power of the voltage conversion circuit as the target control mode. The correspondence between preset power and control mode can be used to indicate the control mode corresponding to different preset power.

[0092] In another possible implementation, the control circuit can use the correspondence between the preset power range and the control mode to select the control mode corresponding to the power range of the voltage conversion circuit as the target control mode. The correspondence between the preset power range and the control mode can be used to indicate the control modes corresponding to different preset power ranges.

[0093] Of course, the control circuit can also determine the target control mode corresponding to the power of the voltage conversion circuit in other ways.

[0094] As can be seen, in the embodiments of this application, by controlling the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit, it is possible to use the corresponding control mode to control the operation of the charging and discharging circuit for different voltage conversion circuit power conditions. In order to meet different harmonic test standards, the capacity of the capacitor used for energy storage in the power supply circuit does not need to be large, thereby reducing the capacitor volume in the power supply circuit.

[0095] In summary, in the embodiments of this application, by obtaining the power of the voltage conversion circuit and controlling the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit, it is possible to use the corresponding control mode to control the operation of the charging and discharging circuit for different voltage conversion circuit power conditions. This allows the power supply circuit to meet different harmonic test standards even when the capacity of the capacitor used for energy storage is small, thereby reducing the capacitor volume in the power supply circuit.

[0096] In one embodiment, Figure 7 This is a flowchart illustrating a circuit control method according to another embodiment of this application. Based on the above embodiment, this application provides an exemplary description of the relevant content in step S402, which involves controlling the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit. For example... Figure 7 As shown, step S402 above may include the following steps:

[0097] Step S4021: Determine the target power range to which the power of the voltage conversion circuit belongs.

[0098] In this step, the control circuit can determine the target power range to which the power of the voltage conversion circuit belongs from a preset power range set. The preset power range set can include multiple preset power ranges from small to large.

[0099] For example, the preset power range set may include: preset power range 1, preset power range 2 and preset power 3, wherein the lower power threshold of preset power range 3 may be greater than the upper power threshold of preset power range 2, and the lower power threshold of preset power range 2 may be greater than the upper power threshold of preset power range 1.

[0100] Step S4022: Determine the target control mode corresponding to the target power range, and control the charging and discharging circuit to work according to the target control mode.

[0101] In this step, the control circuit can select the control mode corresponding to the target control mode as the target control mode based on the correspondence between the preset power range and the control mode, and control the charging and discharging circuit to work according to the target control mode.

[0102] The following embodiments of this application provide exemplary descriptions of control methods for different target power ranges.

[0103] In one possible implementation, if the target power range is greater than or equal to the first power threshold and less than the second power threshold, then the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or the preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

[0104] In this implementation, if the target power range is greater than or equal to the first power threshold and less than the second power threshold (i.e., the lower limit of the target power range is the first power threshold, and the upper limit of the target power range is the second power threshold), then the control circuit can determine the target control mode corresponding to the target power range as the first control mode (or the relaxed power factor correction mode), and control the charging and discharging circuit to operate according to the first control mode. For example, the first power threshold can be 100W, and the second power threshold can be 300W.

[0105] The following embodiments of this application provide an exemplary description of the relevant content of "controlling the operation of the charging and discharging circuit according to the first control mode".

[0106] For example, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit, and control the operation of the charging and discharging circuit according to the target peak current. For instance, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve by querying a preset correspondence between power and peak current based on the power of the voltage conversion circuit.

[0107] As another example, the control circuit can use a preset peak current as the target peak current and control the charging and discharging circuit to operate according to the target peak current. The preset peak current can be the current that the power supply circuit can meet the corresponding harmonic current peak standard.

[0108] It should be understood that, with the power of the voltage conversion circuit and the alternating current (AC) power supply voltage remaining constant, the waveform of the target peak current in this implementation is a fixed value in the time domain.

[0109] It should be noted that during the production and testing phase of electronic devices containing power supply circuits, if the loose power factor correction mode cannot meet the Class A harmonic current peak standard, the peak current of the charging and discharging circuit can be finely adjusted, or the size of capacitor Cbus and capacitor Cbulk in the power supply circuit can be finely adjusted, so that the electronic device can meet the Class A harmonic current peak standard during use after leaving the factory.

[0110] Furthermore, when the control circuit determines the target peak current that the charging and discharging circuit needs to achieve, it can control the operating mode of the charging and discharging circuit based on the target peak current and a preset estimated current. For example, the control circuit can control the conduction state of each switch in the charging and discharging circuit based on the target peak current and the preset estimated current, thereby controlling the operating mode of the charging and discharging circuit.

[0111] Of course, the control circuit can also control the operating mode of the charging and discharging circuit in other ways based on the target peak current and the preset estimated current.

[0112] As can be seen, in this implementation, if the target power range is greater than or equal to the first power threshold and less than the second power threshold, the control circuit determines the target peak current that the charging and discharging circuit needs to reach based on the power of the voltage conversion circuit, or uses the preset peak current as the target peak current and controls the operation of the charging and discharging circuit based on the target peak current. This method can achieve simple and quick determination of the target peak current and control of the charging and discharging circuit, which not only helps to improve the control efficiency of the charging and discharging circuit, but also helps to reduce the capacitor volume in the power supply circuit while meeting the corresponding harmonic test standards.

[0113] In another possible implementation, if the target power range is greater than or equal to the third power threshold and less than the first power threshold, then the target peak current that the charging and discharging circuit needs to reach is determined based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, and the operation of the charging and discharging circuit is controlled according to the target peak current.

[0114] In this implementation, if the target power range is greater than or equal to the third power threshold and less than the first power threshold (i.e., the lower limit of the target power range is the third power threshold, and the upper limit of the target power range is the first power threshold), then the control circuit can determine the target control mode corresponding to the target power range as the second control mode (or strict power factor correction mode), and control the charging and discharging circuit to operate according to the second control mode. For example, the third power threshold can be 75W.

[0115] The following embodiments of this application provide an exemplary description of the relevant content of "controlling the operation of the charging and discharging circuit according to the second control mode".

[0116] Figure 8 This is a schematic flowchart illustrating a method for controlling the operation of a charging and discharging circuit according to a target control mode, as provided in one embodiment of this application. Figure 8 As shown, the method in this application embodiment may include the following steps:

[0117] Step S801: Determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit.

[0118] In this step, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit.

[0119] For example, the control circuit can determine the reference current based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit. The reference current is the average current that needs to be reached when the charging and discharging circuit is in the charging and discharging state, and the waveform of the reference current is a waveform that follows the AC voltage (a sine wave) in the time domain.

[0120] In this embodiment, the control circuit can determine the sampling input current of the voltage conversion circuit based on the power of the voltage conversion circuit, and can determine the set output current of the rectifier circuit and the branch current of the decoupling branch based on the input voltage of the rectifier circuit. The set output current can be the current of the rectifier circuit that meets preset harmonic performance requirements. Furthermore, the control circuit can determine a reference current based on the sampling input current of the voltage conversion circuit, the set output current of the rectifier circuit, and the branch current of the decoupling branch.

[0121] For example, referring to Kirchhoff's current law, the control circuit can use the negative value of the total current of the voltage conversion circuit's sampled input current, the rectifier circuit's set output current, and the decoupling branch's branch current as the reference current.

[0122] It should be understood that in the embodiments of this application, the control circuit can dynamically adjust the reference current according to the power of the voltage conversion circuit and the input voltage of the rectifier circuit.

[0123] Of course, the control circuit can also determine the reference current in other ways based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit.

[0124] Furthermore, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the reference current.

[0125] For example, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the reference current and the preset valley current. For instance, the control circuit can use the difference between twice the reference current and the valley current as the target peak current.

[0126] Of course, the control circuit can also determine the target peak current in other ways based on the reference current.

[0127] Step S802: Control the operation of the charging and discharging circuit according to the target peak current.

[0128] In this step, the control circuit can control the operating mode of the charging and discharging circuit based on the target peak current and the preset estimated current. For example, the control circuit can control the conduction state of each switch in the charging and discharging circuit based on the target peak current and the preset estimated current, thereby controlling the operating mode of the charging and discharging circuit.

[0129] Of course, the control circuit can also control the operating mode of the charging and discharging circuit in other ways according to the target peak current.

[0130] As can be seen, in this implementation, if the target power range is greater than or equal to the third power threshold and less than the first power threshold, the control circuit determines the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, and controls the operation of the charging and discharging circuit according to the target peak current. Since this implementation adjusts the target peak current based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, it can obtain a more accurate target peak current. This allows for more precise control of the charging and discharging circuit based on the target peak current, enabling the power supply circuit to further reduce the capacitor size while meeting the corresponding harmonic testing standards.

[0131] In another possible implementation, the power supply circuit of this application embodiment may further include a decoupling branch connected to the rectifier circuit and the charging and discharging circuit respectively. If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is greater than the preset voltage threshold, the charging and discharging circuit is controlled to be in a non-working state. If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is not greater than the preset voltage threshold, the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or the preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

[0132] For example, if the target power range is less than the third power threshold, that is, the upper limit power threshold of the target power range is the third power threshold, the control circuit can determine the target control mode corresponding to the target power range as the third control mode (or the uncontrolled correction mode), and control the charging and discharging circuit to work according to the third control mode.

[0133] The following embodiments of this application provide an exemplary description of the relevant content of "controlling the operation of the charging and discharging circuit according to the third control mode".

[0134] For example, if the minimum voltage of the decoupling branch is greater than a preset voltage threshold, that is, when the charging and discharging circuit is not working, the minimum voltage of the decoupling branch can meet the power supply requirements of the voltage conversion circuit, then the control circuit can control the charging and discharging circuit to be in a non-working state.

[0135] As another example, if the minimum voltage of the decoupling branch is not greater than a preset voltage threshold, that is, if the minimum voltage of the decoupling branch cannot meet the power supply requirements of the voltage conversion circuit when the charging and discharging circuit is not working, the control circuit can use the method described in the first control mode (or relaxed power factor correction mode) to control the charging and discharging circuit to work so that the minimum voltage of the decoupling branch can meet the power supply requirements of the voltage conversion circuit. For example, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit, or use a preset peak current as the target peak current and control the charging and discharging circuit to work based on the target peak current.

[0136] For example, taking a third power threshold of 75W as an example, if the minimum voltage of the decoupling branch can meet the power supply requirements of the voltage conversion circuit when the charging and discharging circuit is not working within the power range of 0W to 75W, then the control circuit can control the charging and discharging circuit to be in a non-working state.

[0137] For example, taking a third power threshold of 75W as an example, if the minimum voltage of the decoupling branch can meet the power supply requirements of the voltage conversion circuit when the charging and discharging circuit is not working, within the power range of 0 to the preset power (power less than 75W), the control circuit can control the charging and discharging circuit to be in a non-working state. If the minimum voltage of the decoupling branch cannot meet the power supply requirements of the voltage conversion circuit when the charging and discharging circuit is not working, within the power range of the preset power to 75W, the control circuit can use the method described in the first control mode (or the relaxed power factor correction mode) to control the charging and discharging circuit to work, so that the minimum voltage of the decoupling branch can meet the power supply requirements of the voltage conversion circuit.

[0138] As can be seen, in this implementation, if the target power range is less than the third power threshold, different control methods are adopted depending on whether the minimum voltage of the decoupling branch is greater than the preset voltage threshold. This can improve the control flexibility of the power supply circuit, thereby helping to reduce the capacitor volume in the power supply circuit while meeting the corresponding harmonic test standards.

[0139] It should be noted that the above embodiments of this application take the case where the target power range belongs to three different ranges as examples to introduce the relevant content of "determining the target control mode corresponding to the target power range and controlling the operation of the charging and discharging circuit according to the target control mode"; of course, the target power range in the embodiments of this application may also belong to other ranges, and the charging and discharging circuit can be controlled according to the corresponding target control mode.

[0140] It should be understood that the power threshold values ​​involved in the above embodiments of this application are merely exemplary values, and may be other values, which are not limited in the embodiments of this application.

[0141] In summary, in this embodiment, the target power range to which the power of the voltage conversion circuit belongs is determined; furthermore, a target control mode corresponding to the target power range is determined, and the charging and discharging circuit is controlled to operate according to the target control mode. It is evident that in this embodiment, for different target power ranges to which the power of the voltage conversion circuit belongs, different target control modes can be flexibly adopted to control the operation of the charging and discharging circuit. This allows the capacitor used for energy storage in the power supply circuit to meet different harmonic testing standards without requiring a large capacitance, thereby reducing the capacitor size in the power supply circuit.

[0142] In one embodiment, Figure 9 This is a flowchart illustrating a circuit control method according to another embodiment of this application. Based on the above embodiments, this application describes the overall flow of the circuit control method. Figure 9 As shown, the circuit control method of this application embodiment may include the following steps:

[0143] Step S901: The control circuit can obtain the power of the voltage conversion circuit.

[0144] For example, the voltage conversion circuit includes a transformer. In this embodiment, the control chip on the primary side of the transformer can determine the power of the voltage conversion circuit by sampling information such as the voltage and current on the primary side of the transformer. The power of the voltage conversion circuit can be either the input power or the output power of the voltage conversion circuit.

[0145] As another example, the control chip on the primary side of the transformer in this embodiment can obtain the output power information of the voltage conversion circuit from the control chip on the secondary side of the transformer, so as to determine the output power of the voltage conversion circuit.

[0146] Of course, the control circuit in this embodiment can also obtain the power of the voltage conversion circuit in other ways.

[0147] Step S902: The control circuit can determine the target power range to which the power of the voltage conversion circuit belongs, and determine the target control mode corresponding to the target power range.

[0148] In one possible implementation, if the target power range is greater than or equal to the first power threshold and less than the second power threshold, the control circuit can determine the target control mode corresponding to the target power range as the first control mode (or the relaxed power factor correction mode) and execute step S903.

[0149] In another possible implementation, if the target power range is greater than or equal to the third power threshold and less than the first power threshold, the control circuit can determine the target control mode corresponding to the target power range as the second control mode (or the strict power factor correction mode) and execute step S904.

[0150] In another possible implementation, if the target power range is less than the third power threshold, the control circuit can determine the target control mode corresponding to the target power range as the third control mode (or the uncontrolled correction mode) and execute step S905a or step S905b.

[0151] Step S903: The control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit, or use the preset peak current as the target peak current and control the charging and discharging circuit to work based on the target peak current.

[0152] Figure 10 This is a schematic diagram illustrating the result of a first control mode provided in one embodiment of this application, as shown below. Figure 10As shown, if the power of the voltage conversion circuit is 300W and the target peak current is not adjusted, and the control circuit controls the operation of the charging and discharging circuit according to the first control mode, the amplitude of the AC harmonic current meets the harmonic test standard.

[0153] Step S904: The control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, and control the charging and discharging circuit to work based on the target peak current.

[0154] Step S905a: If the minimum voltage of the decoupling branch is greater than the preset voltage threshold, the control circuit can control the charging and discharging circuit to be in a non-working state.

[0155] Step S905b: If the minimum voltage of the decoupling branch is not greater than the preset voltage threshold, the control circuit can determine the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit, or use the preset peak current as the target peak current and control the charging and discharging circuit to work based on the target peak current.

[0156] In summary, in this embodiment, the target power range to which the voltage conversion circuit belongs is determined; furthermore, the target control mode corresponding to the target power range is determined, and the charging and discharging circuit is controlled according to the target control mode. It is evident that in this embodiment, different target control modes can be flexibly adopted to control the charging and discharging circuit when the voltage conversion circuit belongs to different target power ranges. This achieves "a relaxed power factor correction mode for short-term high power, a strict power factor correction mode for long-term medium power, and an uncontrollable mode for low power," thus allowing for a smaller capacitor capacity in the power supply circuit while meeting different harmonic testing standards, thereby reducing the capacitor volume in the power supply circuit.

[0157] Furthermore, the power factor of the electronic device including the power supply circuit of the present application embodiment may vary at different output powers. For example, the power factor at medium power over a long period is better than that at high power over a short period, and the device exhibits better harmonic performance at medium power over a long period.

[0158] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0159] Based on the same inventive concept, this application also provides a circuit control device for implementing the circuit control method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more circuit control device embodiments provided below can be found in the limitations of the circuit control method described above, and will not be repeated here.

[0160] In one embodiment, Figure 11 This is a schematic diagram of the circuit control device in one embodiment of this application. The circuit control device provided in this embodiment can be disposed in a control circuit for controlling a power supply circuit. The power supply circuit may include a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit. The charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively. Figure 11 As shown, the circuit control device in this application embodiment may include: an acquisition module 1101 and a control module 1102.

[0161] The acquisition module 1101 is used to acquire the power of the voltage conversion circuit;

[0162] The control module 1102 is used to control the operation of the charging and discharging circuit according to the target control mode corresponding to the power of the voltage conversion circuit.

[0163] In one embodiment, the control module 1102 may include:

[0164] The determining unit is used to determine the target power range to which the power of the voltage conversion circuit belongs;

[0165] The control unit is used to determine the target control mode corresponding to the target power range and control the operation of the charging and discharging circuit according to the target control mode.

[0166] In one embodiment, the control unit is specifically used for:

[0167] If the target power range is greater than or equal to the first power threshold and less than the second power threshold, then the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or the preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

[0168] In one embodiment, the control unit is specifically used for:

[0169] If the target power range is greater than or equal to the third power threshold and less than the first power threshold, then the target peak current that the charging and discharging circuit needs to achieve is determined based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, and the operation of the charging and discharging circuit is controlled according to the target peak current.

[0170] In one embodiment, the control unit is specifically used for:

[0171] The reference current is determined based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit. The reference current is the average current that needs to be reached when the charging and discharging circuit is in the charging and discharging state.

[0172] The target peak current that the charging and discharging circuit needs to achieve is determined based on the reference current.

[0173] In one embodiment, the power supply circuit further includes a decoupling branch connected to the rectifier circuit and the charging / discharging circuit respectively, and the control unit is specifically used for:

[0174] If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is greater than the preset voltage threshold, the charging and discharging circuit is controlled to be in a non-working state.

[0175] If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is not greater than the preset voltage threshold, then the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or the preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

[0176] The circuit control device provided in this application embodiment can be used to execute the technical solutions in the above-described circuit control method embodiments of this application. Its implementation principle and technical effect are similar, and will not be repeated here.

[0177] In one embodiment, Figure 12 This is a schematic diagram of the power supply device in one embodiment of this application, as shown below. Figure 12 As shown, the power supply device in this embodiment may include a power supply circuit 1201 and a control circuit 1202.

[0178] The power supply circuit 1201 may include a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, with the charging / discharging circuit connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively. It should be understood that the specific structure of the power supply circuit 1201 can be found in the relevant content of the above embodiments of this application, and will not be repeated here.

[0179] The control circuit 1202 is used to execute the technical solution in the above-described circuit control method embodiment of this application. Its implementation principle and technical effect are similar, and will not be described again here.

[0180] In one embodiment, the charging and discharging circuit may include an inductor, a first switch, a second switch, and a capacitor. One end of the inductor is connected to the rectifier circuit, and the other end of the inductor is connected to the first and second switches. The other ends of the first and second switches are respectively connected to the two ends of the capacitor. It should be understood that the specific structure of the charging and discharging circuit can be found in the relevant content of the above embodiments of this application, and will not be repeated here.

[0181] In one embodiment, the power supply circuit may further include decoupling branches connected to the rectifier circuit and the charge / discharge circuit, respectively.

[0182] In one embodiment, an electronic device is provided, which may include the power supply device described above.

[0183] For example, the electronic devices in the embodiments of this application may include, but are not limited to: power adapters, cookie chargers, power banks, mobile phones, laptops, tablets, smartwatches, smart bracelets, smart glasses, robot vacuums, wireless headphones, Bluetooth speakers, electric toothbrushes, rechargeable wireless mice, or desktop computers.

[0184] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the technical solution in the above-described circuit control method embodiment of this application. Its implementation principle and technical effect are similar, and will not be repeated here.

[0185] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the technical solutions in the circuit control method embodiments of this application. The implementation principle and technical effects are similar and will not be repeated here.

[0186] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The processors involved in the embodiments provided in this application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited thereto.

[0187] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0188] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A circuit control method, characterized in that, A method for controlling a power supply circuit, the power supply circuit including a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively, and the method includes: Obtain the power of the voltage conversion circuit; Determine the target power range to which the power of the voltage conversion circuit belongs; Determine the target control mode corresponding to the target power range, and control the operation of the charging and discharging circuit according to the target control mode; The step of determining the target control mode corresponding to the target power range and controlling the charging and discharging circuit to operate according to the target control mode includes: If the target power range is greater than or equal to the first power threshold and less than the second power threshold, then the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or a preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

2. The method according to claim 1, characterized in that, The step of determining the target control mode corresponding to the target power range and controlling the charging and discharging circuit to operate according to the target control mode includes: If the target power range is greater than or equal to the third power threshold and less than the first power threshold, then the target peak current that the charging and discharging circuit needs to achieve is determined based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit, and the charging and discharging circuit is controlled to work based on the target peak current.

3. The method according to claim 2, characterized in that, Determining the target peak current that the charging and discharging circuit needs to achieve based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit includes: The reference current is determined based on the power of the voltage conversion circuit and the input voltage of the rectifier circuit. The reference current is the average current that needs to be achieved when the charging and discharging circuit is in a charging and discharging state. The target peak current that the charging and discharging circuit needs to achieve is determined based on the reference current.

4. The method according to claim 2 or 3, characterized in that, The power supply circuit further includes decoupling branches connected to the rectifier circuit and the charging / discharging circuit respectively. Determining the target control mode corresponding to the target power range and controlling the charging / discharging circuit to operate according to the target control mode includes: If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is greater than the preset voltage threshold, then the charging and discharging circuit is controlled to be in a non-working state. If the target power range is less than the third power threshold and the minimum voltage of the decoupling branch is not greater than the preset voltage threshold, then the target peak current that the charging and discharging circuit needs to achieve is determined according to the power of the voltage conversion circuit, or the preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

5. A circuit control device, characterized in that, For controlling a power supply circuit, the power supply circuit includes a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively. The device includes: An acquisition module is used to acquire the power of the voltage conversion circuit; The control module is used to determine the target power range to which the power of the voltage conversion circuit belongs, determine the target control mode corresponding to the target power range, and control the charging and discharging circuit to work according to the target control mode; The control module is used for: If the target power range is greater than or equal to the first power threshold and less than the second power threshold, then the target peak current that the charging and discharging circuit needs to reach is determined according to the power of the voltage conversion circuit, or a preset peak current is used as the target peak current, and the charging and discharging circuit is controlled to work according to the target peak current.

6. A power supply device, characterized in that, The power supply device includes: a power supply circuit and a control circuit; wherein the control circuit is used to perform the method as described in any one of claims 1-4; The power supply circuit includes a rectifier circuit, a charging / discharging circuit, and a voltage conversion circuit, wherein the charging / discharging circuit is connected in parallel with the rectifier circuit and the voltage conversion circuit, respectively.

7. The power supply device according to claim 6, characterized in that, The charging and discharging circuit includes an inductor, a first switch, a second switch, and a capacitor; wherein one end of the inductor is connected to the rectifier circuit, the other end of the inductor is connected to the first switch and the second switch, and the other ends of the first switch and the second switch are respectively connected to the two ends of the capacitor.

8. The power supply device according to claim 6 or 7, characterized in that, The power supply circuit also includes decoupling branches that are connected to the rectifier circuit and the charging / discharging circuit respectively.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-4.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-4.

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