Power adaptive control method and device of switching power supply and switching power supply

Abstract

The application is suitable for the technical field of power supply, and particularly provides a power adaptive control method and device of a switching power supply and the switching power supply, which comprises the following steps: obtaining the working state of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs, and the working state comprises a startup state and a shutdown state; when it is confirmed that at least two power outputs in the switching power supply are in the startup state, obtaining the current power of each power output in the startup state; respectively calculating the power change information of each power output according to the output power historical data and the corresponding current power of each power output, and setting the maximum allowable output power of each power output according to the power change information of each power output and the full power of the switching power supply. The switching power supply is set to comprise at least two power outputs, that is, the power supply adopts a scheme of one PFC with multiple DCDCs, so that the number of PFC circuits is reduced, and the hardware cost is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology, and particularly relates to a power adaptive control method, device and switching power supply for a switching power supply. Background Technology

[0002] A switch-mode power supply (SMPS), also known as a switching power supply or switching converter, is a high-frequency power conversion device and a type of power supply. Its function is to convert a voltage at a given level into the voltage or current required by the user through various structural designs.

[0003] Existing switching power supplies typically employ a PFC (Power Factor Correction) output scheme paired with a DC-DC converter. When a product has multiple outputs, the number of power supplies required corresponds to the number of outputs. For example, in a battery swapping cabinet system, if there are 8 outputs, then 8 power supplies are needed, resulting in high hardware costs. Summary of the Invention

[0004] This invention provides a power adaptive control method for switching power supplies, which solves the problem that existing switching power supplies, which use a PFC and a DC-DC converter, result in complex circuit structures and increased hardware costs.

[0005] This invention is implemented as follows: a power adaptive control method for a switching power supply, comprising:

[0006] Acquire the operating status of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs, and the operating status includes power-on state and power-off state;

[0007] When it is confirmed that at least two power outputs in the switching power supply are in the power-on state, the current power of each power output in the power-on state is obtained;

[0008] The power change information of each power output is calculated based on the historical output power data and the corresponding current power of each power output.

[0009] The maximum allowable output power of each power output is set based on the power change information of each power output and the full power of the switching power supply.

[0010] Furthermore, after the step of obtaining the operating states of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs and the operating states include power-on and power-off states, the method further includes:

[0011] When it is confirmed that only one power output in the switching power supply is in the power-on state, obtain the required power of the power output in the power-on state;

[0012] Adjust the actual output power of the power output when the machine is on according to the power demand.

[0013] Furthermore, the step of calculating the power change information of each power output based on the historical output power data and the corresponding current power of each power output includes:

[0014] For each power output, acquire historical data of the output power of the corresponding power output within a preset time period;

[0015] The power change information of the corresponding power output is obtained by calculating the difference between the current power and historical data of the same power output.

[0016] Furthermore, the steps for setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply include:

[0017] When the output power of the current power output increases, the output power of the remaining power outputs other than the current power output will be reduced to a preset power. The preset power is calculated by dividing the full power by the number of power outputs that are in the power-on state.

[0018] The maximum allowable output power of the current channel is calculated based on the output power at full power and the output power of the remaining power outputs.

[0019] Furthermore, the steps for setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply include:

[0020] When the output power of the current power output channel decreases, the remaining power is calculated based on the full power and the current power output of the current power output channel.

[0021] Adjust the output power of all power outputs except the current one to the target power, where the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

[0022] Secondly, this application also provides a power adaptive control device for a switching power supply, comprising:

[0023] The operating status acquisition unit is used to acquire the operating status of all power outputs of the switching power supply. The switching power supply has at least two power outputs, and the operating status includes power-on status and power-off status.

[0024] The current power acquisition unit is used to acquire the current power of each power output that is in the power-on state when it is confirmed that there are at least two power outputs in the switching power supply.

[0025] The power change information calculation unit is used to calculate the power change information of each power output based on the historical output power data and the corresponding current power of each power output.

[0026] The output power adjustment unit is used to set the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply.

[0027] Furthermore, the device includes:

[0028] The power demand acquisition unit is used to acquire the power demand of the power output that is in the power-on state when it is confirmed that only one power output in the switching power supply is in the power-on state.

[0029] The actual output power adjustment unit is used to adjust the actual output power of the power output when the device is on, according to the power demand.

[0030] Furthermore, the power change information calculation unit includes:

[0031] The historical data acquisition subunit is used to acquire historical data of the output power of each power output within a preset time period for each power output.

[0032] The difference calculation subunit is used to calculate the difference between the current power and historical data of the same power output to obtain the power change information of the corresponding power output.

[0033] Furthermore, the output power adjustment unit also includes:

[0034] The first power adjustment subunit is used to reduce the output power of the remaining power outputs other than the current power output to a preset power when the output power of the current power output increases. The preset power is calculated by dividing the full power by the number of power outputs in the power-on state.

[0035] The first power calculation subunit is used to calculate the maximum allowable output power of the current channel based on the output power of the full power and the output power of the remaining power outputs.

[0036] Furthermore, the output power adjustment unit also includes:

[0037] The second power adjustment subunit is used to calculate the remaining power based on the full power and the current power of the current power output when the output power of the current channel decreases.

[0038] The second power calculation subunit is used to adjust the output power of the remaining power outputs other than the current power output to the target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

[0039] Thirdly, this application also provides a switching power supply, which includes the power adaptive control device for the switching power supply as described above.

[0040] The beneficial effects of this invention are that by setting the switching power supply to include at least two power outputs, during operation, the working status of all power outputs of the switching power supply is first obtained. When it is confirmed that at least two power outputs are in the power-on state, the current power of each power output in the power-on state is obtained. Then, based on the historical output power data and the current power of each power output, the power change information of each power output is calculated. Based on the power change information and the full power of the switching power supply, the maximum allowable output power of each power output is adjusted, making full use of the power supply's full power. Moreover, since the power supply includes at least two power outputs, that is, the power supply adopts a scheme of one PFC with multiple DC-DC converters, reducing the number of PFC circuits and effectively reducing hardware costs. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating an embodiment of the power adaptive control method for a switching power supply according to this application;

[0042] Figure 2 This is a flowchart illustrating another embodiment of the power adaptive control method for switching power supplies of the present invention;

[0043] Figure 3 This is a flowchart illustrating yet another embodiment of the power adaptive control method for a switching power supply according to the present invention.

[0044] Figure 4 This is a flowchart illustrating another embodiment of the power adaptive control method for switching power supplies of the present invention.

[0045] Figure 5 This is a schematic diagram of the module structure of an embodiment of the power adaptive control device for the switching power supply of the present invention.

[0046] Figure 6 This is a schematic flowchart of an embodiment of the adaptive power control method for a switching power supply of the present invention, showing the adaptive control method for two power channels.

[0047] Figure 7 This is a schematic flowchart of another embodiment of the power adaptive control device for the switching power supply of the present invention, which is a two-channel power adaptive control method. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0049] This invention reduces the number of PFC circuits and effectively lowers hardware costs by configuring the switching power supply to include at least two power outputs, i.e., the power supply adopts a scheme of one PFC driving multiple DC-DC converters.

[0050] Example 1

[0051] like Figure 1 As shown, this embodiment provides a power adaptive control method for a switching power supply, including:

[0052] S100. Obtain the operating status of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs, and the operating status includes power-on state and power-off state.

[0053] In implementation, the switching power supply provided in this application adopts a one-to-many scheme. Specifically, a one-to-many switching power supply means that the switching power supply consists of one PFC connected to at least two DC-DC converters, which means that the switching power supply has at least two power outputs. Optionally, each power output can be connected to a load to supply power to the load. For example, taking a battery swapping cabinet as an example, the battery swapping cabinet includes multiple switching power supplies, each of which includes at least two power outputs. In implementation, each power output can be regarded as a battery compartment, and the battery can be regarded as a load. When the battery is placed in the battery compartment, the battery is electrically connected to one power output, thereby charging the battery.

[0054] Optionally, the operating state of each power output includes an on state and an off state. The on state indicates that the power output is supplying power to the load, while the off state indicates that the power output is not supplying power to the load. For example, taking the battery swapping cabinet mentioned above, when the battery is placed in the battery compartment, charging the battery can be considered as the power output being on, and if the battery is removed or the battery is fully charged and charging stops, the power output can be considered as being off.

[0055] It should be noted that the above-mentioned battery swapping cabinet and the charging and stopping of the battery are illustrative examples of one embodiment of this application, and not specific limitations on this application. In other embodiments, the switching power supply can also be used in other electronic products, which are not limited here.

[0056] Optionally, the switching power supply may be equipped with a processor, and the steps of the power adaptive control method of the switching power supply provided in this application are executed by the processor. Optionally, the processor may be an actual processor set on the switching power supply, or it may be a virtual processor in the cloud; no specific limitation is made here.

[0057] In some embodiments, the operating status of each power output can be determined by detecting the voltage and / or current signals of each power output. For example, when a charging current is detected from the battery swapping cabinet charging the battery, it can be confirmed that the power output is in the powered-on state; if no charging current is detected, it can be confirmed that the power output is in the powered-off state.

[0058] In other possible embodiments, the operating status of each power output can also be determined in other ways, such as communicating with the battery management system of the battery to confirm whether the battery is charging, which is not limited here.

[0059] S200: Determine if at least two power outputs are in the powered-on state;

[0060] If it is determined that at least two power outputs in the switching power supply are in the powered-on state, proceed to step S300; otherwise, proceed to step S110.

[0061] S300: Obtain the current power of each power output that is in the power-on state;

[0062] When at least two power outputs in a switching power supply are powered on, it is necessary to distribute and control the output power of these two power outputs. First, the current power of each power output in the powered-on state is obtained. In some embodiments, the current power of each power output can be calculated by detecting the voltage and current of each power output.

[0063] S400: Calculate the power change information of each power output based on the historical output power data and the corresponding current power of each power output.

[0064] S500: Set the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply.

[0065] In some embodiments, the PFC circuit of the switching power supply is designed for full power, and at least two output DC-DC circuits are also designed for full power, where full power refers to the maximum power that the switching power supply can output. For example, taking a full power of 2kW as an example, if the PFC circuit and each DC-DC circuit are designed for 2kW, then each power output can output any power between 0 and 2kW. Of course, the full power of the power supply is not limited to the aforementioned 2kW, and is not limited here.

[0066] In some possible embodiments, when at least two power outputs are in the power-on state, the maximum output power of each power output in the power-on state is an average of the full power. For example, a switching power supply includes M power outputs, where M is greater than or equal to 2, and N power outputs are in the power-on state, where N is less than or equal to M. The maximum output power is set to Pmax / N. If the power demand of each power output in the power-on state exceeds Pmax / N, then the maximum output power of the N power outputs is limited to Pmax / N; if the power demand of each power output in the power-on state does not exceed Pmax / N, then the required output power is output according to the time of each power output; if the power demand of one of the power outputs in the power-on state is X and less than Pmax / N, then (Pmax-X) is allocated to the power allowed to be output by the other power outputs.

[0067] When the output power of any power output changes, the maximum allowable output power of each power output in the power-on state is adjusted according to the power change information and full power.

[0068] Optionally, the power change information can be calculated based on the historical output power data and current power of each power output channel. Specifically, the processor will detect and save the output power of each power output channel that is in the power-on state at preset intervals (e.g., 2 milliseconds, 3 milliseconds, or 5 milliseconds). For each power output channel that is in the power-on state, the power change information can be calculated by combining the most recently detected historical output power data with the current power, or by combining the average of several detected historical output power data with the current power.

[0069] In some embodiments, taking a switching power supply with two power outputs as an example, namely a first power output and a second power output, when both the first power output and the second power output are in the power-on state, the current power Pm1 of the first power output and the current power Pm2 of the second power output are obtained.

[0070] When the output power of the first power output increases, decrease Pm2≤Pmax*50%, then the maximum allowable output power of the first power output Pa1≤Pmax-Pm2, and the maximum allowable output power of the second power output Pa2≤Pmax-Pa1. Then adjust Pm1 and Pm2 according to Pa1 and Pa2.

[0071] When the power output of the first power channel decreases, Pa2≤Pmax-Pm1, then Pa1≤Pmax-Pa2, and then Pm1 and Pm2 are adjusted according to Pa1 and Pa2.

[0072] When the power of the first power output remains unchanged while the power of the second power output increases, reduce Pm1 ≤ Pmax * 50%. At this time, the maximum allowable output power of the second power output Pa2 ≤ Pmax - Pm1, and the maximum allowable output power of the first power output Pa1 ≤ Pmax - Pa2. Then adjust Pm1 and Pm2 according to Pa1 and Pa2.

[0073] When the power output of the first power channel remains unchanged while the power output of the second power channel decreases, Pa1≤Pmax-Pm2, and Pa2≤Pmax-Pa1, then adjust Pm1 and Pm2 according to Pa1 and Pa2.

[0074] For ease of understanding, this embodiment takes the example of the first power output starting first and the second power output starting later. The specific power adaptive control is described as follows:

[0075] 1. If the output power Pm1 of the first power output is less than Pmax*50%, then the allowable output power Pa2 of the second power output is Pmax-Pm1.

[0076] 2. If the output power of the first power output is Pm1 ≥ Pmax * 50%, then the output power of the first power output is reduced to Pm1 ≤ Pmax * 50%. At this time, the allowable output power of the second power output is Pa2 = Pmax - Pm1.

[0077] 3. Based on actual power requirements, when the output power of the first power output increases or decreases, the output power of the second power output is simultaneously reduced or increased, thereby always keeping the switching power supply working at its maximum output power and achieving the goal of fully utilizing the switching power supply.

[0078] It should be noted that when the second power output starts outputting first and the first power output starts outputting later, the adaptive adjustment logic of the output power of each power output is the same as above, and will not be elaborated here.

[0079] In some possible embodiments, taking a switching power supply with three power outputs as an example, the first power output starts outputting first, then the second power output starts outputting next, and the third power output starts outputting last. The specific power adaptive control is described as follows:

[0080] 1. When only the first power output is activated, the output power is adjusted according to the actual power demand of the first power output. For example, if the output power demand of the first power output is Pmax*40%, then the output power of the first power output is adjusted to Pmax*40%; if the output power demand of the first power output is Pmax*70%, then the output power of the first power output is adjusted to Pmax*70%. No limit is imposed here.

[0081] 2. When the second power output is started, the adaptive control logic is as follows:

[0082] ①. If the output power Pm1 of the first power output is less than Pmax*50%, then the allowable output power Pa2 of the second power output is Pmax-Pm1.

[0083] ②. If the output power of the first power output is Pm1≥Pmax*50%, then the output power of the first power output is reduced to Pm1≤Pmax*50%. At this time, the allowable output power of the second power output is Pa2=Pmax-Pm1.

[0084] ③. Based on actual power requirements, when the output power of the first power output increases or decreases, the output power of the second power output is simultaneously reduced or increased, thereby always keeping the switching power supply operating at maximum output power.

[0085] For example, taking a battery swapping cabinet as an example, the first power output and the second power output each correspond to two rechargeable batteries. When both rechargeable batteries are charging, the first and second power outputs each output Pmax*50% to charge the two batteries. The charging power of the batteries will change with their charge level, depending on the specific charging strategy, which will not be elaborated here. When the power of one of the rechargeable batteries changes, for example, the output power of the first power output becomes Pmax*40%, the extra Pmax*10% of the power from the first power output can be allocated to the second power output, making the output power of the second power output reach Pmax*60%.

[0086] 3. When the third power output is started, the adaptive control logic is as follows:

[0087] ①. If the output power of the first power output Pm1 < Pmax * 33%, then the allowable output power of the second power output Pa2 = (Pmax - Pm1) / 2, and the allowable output power of the third power output Pa3 = (Pmax - Pm1) / 2.

[0088] ②. If the output power of the first power output is Pm1≥Pmax*33%, then the output power of the first power output is reduced to Pm1≤Pmax*33%. At this time, the allowable output power of the second power output is Pa2=(Pmax-Pm1) / 2, and the allowable output power of the third power output is Pa3=(Pmax-Pm1) / 2.

[0089] ③. Based on actual power demand, when the output power of any one or more power outputs increases or decreases, the output power of the remaining power outputs will be reduced or increased simultaneously, thereby always keeping the switching power supply operating at maximum output power.

[0090] This application embodiment configures the switching power supply to include at least two power outputs. During operation, the operating status of all power outputs of the switching power supply is first acquired. When it is confirmed that at least two power outputs are in the power-on state, the current power of each power output in the power-on state is acquired. Then, based on the historical output power data and current power of each power output, the power change information of each power output is calculated. Based on the power change information and the full power of the switching power supply, the maximum allowable output power of each power output is adjusted to make full use of the power supply's full power. Moreover, since the power supply includes at least two power outputs, that is, the power supply adopts a scheme of one PFC with multiple DC-DC converters, reducing the number of PFC circuits and effectively reducing hardware costs.

[0091] Example 2

[0092] In some alternative embodiments, such as Figure 1 As shown, after the step of obtaining the operating states of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs and the operating states include power-on and power-off states, the method further includes:

[0093] S110, Obtain the required power output when the device is powered on;

[0094] S120: Adjust the actual output power of the power output when the machine is on according to the required power.

[0095] When it is confirmed that only one power output in the switching power supply is in the ON state, that is, only one power output is working independently, the output power of that power output can be controlled to output any power between 0 and Pmax according to actual needs. Optionally, the required power of the power output in the ON state is first obtained, and then the actual output power of the corresponding power output is adjusted according to the required power. For example, if the required power of the power output in the ON state is 80% of the full power Pmax, the power output can output Pmax*80% of the power to meet the load power requirement.

[0096] Example 3

[0097] In some alternative embodiments, such as Figure 2 As shown, the steps for calculating the power change information of each power output based on the historical output power data and the corresponding current power of each power output include:

[0098] S410. For each power output, obtain historical data of the output power of the corresponding power output within a preset time period;

[0099] S420: Calculate the difference between the current power and historical data of the same power output to obtain the power change information of the corresponding power output.

[0100] During operation, the controller can periodically or at set time intervals acquire and save the output power of each power output that is in the power-on state. In practice, for each power output, the controller acquires historical data of the output power of that power output within a preset time period, and then calculates the difference between the historical data and the current power of the same power output to confirm the power change information of that power output. Optionally, the historical data can be the previously detected output power of the corresponding power output. By calculating the difference between the previously detected output power and the current power, the power change information of the power output is confirmed based on the difference. For example, subtracting the current power from the previously detected output power, if the difference is positive, it means that the output power of that power output has decreased; if the difference is negative, it means that the output power of that power output has increased.

[0101] Optionally, the output power detected within a preset time period can be multiple, meaning the historical data includes multiple output power values, each representing the output power detected at different points in time within the preset time period. In implementation, the average of the multiple output power values ​​can be calculated, and then the difference between this average and the current power can be calculated. The power change information is then confirmed based on this difference. Specifically, the confirmation of power change information can refer to the power change information confirmation process described above, and will not be elaborated upon here.

[0102] Example 4

[0103] In some alternative embodiments, such as Figure 3 As shown, the steps for setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply include:

[0104] S511. When the output power of the current power output increases, the output power of the remaining power outputs other than the current power output is reduced to a preset power. The preset power is calculated by dividing the full power by the number of power outputs in the power-on state.

[0105] S512. Calculate the maximum allowable output power of the current channel based on the output power of the full power and the output power of the remaining power outputs.

[0106] In implementation, when the output power of one power output increases, the output power of another one or more power outputs must decrease accordingly to maintain the full power of the switching power supply. Specifically, among all power outputs currently in operation, if an increase in the output power of the current power output is detected, the output power of the other power outputs can be reduced to a preset power. In implementation, this preset power can be calculated by dividing the full power by the number of power outputs currently in operation. For example, if there are two power outputs currently in operation, the preset power is Pmax * 50%. Similarly, if there are three power outputs currently in operation, the preset power is Pmax * 33%; if there are four power outputs currently in operation, the preset power is Pmax * 25%. And so on, the preset power = Pmax / N, where N is the number of power outputs currently in operation.

[0107] In some embodiments, such as Figure 4 As shown, the steps for setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply include:

[0108] S521. When the output power of the current power output channel decreases, the remaining power is calculated based on the full power and the current power output of the current power output channel.

[0109] S522. Adjust the output power of all power outputs except the current power output to the target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

[0110] In practice, when the output power of one power output decreases, the output power of the other power outputs must be increased accordingly to meet the full power requirement of the switching power supply.

[0111] Specifically, among all power outputs currently in operation, if a decrease in the output power of the current power output is detected, the output power of the other power outputs can be increased. For example, taking two power outputs currently in operation as an example, when the output power of the first power output decreases, its real-time power Pm1 is less than or equal to Pmax*50%. For instance, in a battery swapping cabinet, if a switching power supply connects to two rechargeable batteries for charging, and the power required by the first rechargeable battery decreases during charging, for example from Pmax*50% to Pmax*45%, then the remaining power is calculated to be Pmax*55%. At this point, the power output for charging the second rechargeable battery can be adjusted to Pmax*55%. Similarly, if a switching power supply in the battery swapping cabinet connects to three rechargeable batteries for charging, when the power required is less than or equal to Pmax*50%, the remaining power can be adjusted accordingly. For example, in a battery swapping cabinet, a switching power supply connects to two rechargeable batteries for charging. When the power required by the first rechargeable battery decreases during charging, for example, from Pmax*30% to Pmax*20%, the remaining power is calculated to be Pmax*80%. The second and third rechargeable batteries can share this Pmax*80 equally, that is, the power for charging the second rechargeable battery is adjusted to Pmax*40%, and the power for charging the third rechargeable battery is adjusted to Pmax*40%.

[0112] In some embodiments, such as Figure 6 As shown, in some embodiments, taking two power outputs as an example, namely one power output and two power outputs, where Pmax is the full power of the power supply, Pm1 is the actual output power of the first output, Pm2 is the actual output power of the second output, Pa1 is the maximum allowable output power of the first output, and Pa2 is the maximum allowable output power of the second output. The power adaptive control is described as follows:

[0113] First, it's necessary to determine whether channels 1 and 2 are powered on. If only channel 1 is powered on, confirm that Pa2=0 and Pa1=Pmax. Similarly, if only channel 2 is powered on, confirm that Pa1=0 and Pa2=Pmax. In practice, Pa1=Pmax or Pa2=Pmax means that channel 1 or channel 2 can output any power from 0 to Pmax.

[0114] When both channels 1 and 2 are powered on, obtain the current power Pm1 of channel 1 and the current power Pm2 of channel 2.

[0115] Determine whether the output power of channel 1 has increased or decreased. If it has increased, decrease Pm2 ≤ Pmax * 50%, and confirm that Pa1 ≤ Pmax - Pm2 and Pa2 ≤ Pm2. Then adjust Pm1 and Pm2 based on Pa1 and Pa2. If it has decreased, ensure that Pa2 ≤ Pmax - Pm1 and confirm that Pa1 ≤ Pm1. Then adjust Pm1 and Pm2 based on Pa1 and Pa2.

[0116] When the power of channel 1 remains constant, determine whether the output power of channel 2 increases or decreases. If it increases, decrease Pm1 ≤ Pmax * 50%, and confirm that Pa2 ≤ Pmax - Pm1 and Pa1 ≤ Pm1. Then adjust Pm1 and Pm2 based on Pa1 and Pa2. If it decreases, confirm that Pa1 ≤ Pmax - Pm2 and Pa2 ≤ Pm2. Then adjust Pm1 and Pm2 based on Pa1 and Pa2.

[0117] In some possible embodiments, after adjusting Pm1 and Pm2 based on Pa1 and Pa2, the processor can return to the power output power-on judgment step. That is, during operation, the above-mentioned power adaptive control process is executed cyclically, dynamically adjusting the power of each power output in real time according to the changes in the output power of each power output. This ensures that the switching power supply always operates at its maximum output power, achieving the goal of fully utilizing the switching power supply.

[0118] For ease of understanding, this embodiment uses the example of one channel starting its output first and the other two channels starting their outputs later. Figure 7 As shown, the specific power adaptive control is described below:

[0119] First, start the power output of channel 1. At this time, the power output of channel 2 is off. Channel 1 can output any power between 0 and Pmax according to actual needs.

[0120] When both channels are powered on, check if Pm1 < Pmax * 50%. If so, set Pa2 = Pmax - Pm1. If not, reduce the power of Pm1 and return to the step of checking if Pm1 < Pmax * 50%.

[0121] During operation, the current power Pm1 of channel 1 and the current power Pm2 of channel 2 are acquired. Based on the actual power requirements, when the output power of channel 1 increases or decreases, the output power of channel 2 is simultaneously decreased or increased. Specifically, it is determined whether the output power of channel 1 has increased or decreased. If it has increased, Pm2 is decreased by ≤ Pmax * 50%, and Pa1 ≤ Pmax - Pm2 and Pa2 ≤ Pm2 are confirmed. Then, Pm1 and Pm2 are adjusted based on Pa1 and Pa2. If it has decreased, Pa2 ≤ Pmax - Pm1 is determined, and Pa1 ≤ Pm1 is confirmed. Then, Pm1 and Pm2 are adjusted based on Pa1 and Pa2.

[0122] When the power of channel 1 remains constant, determine whether the output power of channel 2 increases or decreases. If it increases, decrease Pm1 ≤ Pmax * 50%, and confirm that Pa2 ≤ Pmax - Pm1 and Pa1 ≤ Pm1. Then adjust Pm1 and Pm2 based on Pa1 and Pa2. If it decreases, confirm that Pa1 ≤ Pmax - Pm2 and Pa2 ≤ Pm2. Then adjust Pm1 and Pm2 based on Pa1 and Pa2.

[0123] It should be noted that when two power outputs start outputting first, and one power output starts outputting later, the adaptive adjustment logic of the output power of each power output is the same as above, and will not be elaborated here.

[0124] This application allows for power output via a single power output channel or simultaneously output to at least two power output channels. Each power output channel is designed to operate at full power, maximizing the utilization of the power supply's capacity. Furthermore, by designing a multi-output power supply, with one PFC circuit supporting at least two DC-DC converters, meaning one power supply has at least two output channels, this design saves on PFC circuitry and reduces hardware costs.

[0125] Example 5

[0126] In some alternative embodiments, such as Figure 5 As shown, this application also provides a power adaptive control device for a switching power supply, comprising:

[0127] The operating status acquisition unit 2100 is used to acquire the operating status of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs and the operating status includes power-on status and power-off status.

[0128] The current power acquisition unit 2200 is used to acquire the current power of each power output that is in the power-on state when it is confirmed that there are at least two power outputs in the switching power supply.

[0129] The power change information calculation unit 2300 is used to calculate the power change information of each power output based on the historical output power data and the corresponding current power of each power output.

[0130] The output power adjustment unit 2400 is used to set the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply.

[0131] This application embodiment configures the switching power supply to include at least two power outputs. During operation, the operating status of all power outputs of the switching power supply is first acquired. When it is confirmed that at least two power outputs are in the power-on state, the current power of each power output in the power-on state is acquired. Then, based on the historical output power data and current power of each power output, the power change information of each power output is calculated. Based on the power change information and the full power of the switching power supply, the maximum allowable output power of each power output is adjusted to make full use of the power supply's full power. Moreover, since the power supply includes at least two power outputs, that is, the power supply adopts a scheme of one PFC with multiple DC-DC converters, reducing the number of PFC circuits and effectively reducing hardware costs.

[0132] In some alternative embodiments, the apparatus includes:

[0133] The power demand acquisition unit is used to acquire the power demand of the power output that is in the power-on state when it is confirmed that only one power output in the switching power supply is in the power-on state.

[0134] The actual output power adjustment unit is used to adjust the actual output power of the power output when the device is on, according to the power demand.

[0135] In some alternative embodiments, the power change information calculation unit 2300 includes:

[0136] The historical data acquisition subunit is used to acquire historical data of the output power of each power output within a preset time period for each power output.

[0137] The difference calculation subunit is used to calculate the difference between the current power and historical data of the same power output to obtain the power change information of the corresponding power output.

[0138] In some alternative embodiments, the output power adjustment unit 2400 may include:

[0139] The first power adjustment subunit is used to reduce the output power of the power outputs other than the current power output to a preset power when the output power of the current power output increases. The preset power is calculated by dividing the full power by the number of power outputs in the power-on state.

[0140] The first power calculation subunit is used to calculate the maximum allowable output power of the current channel based on the output power of the full power and the output power of the remaining power outputs.

[0141] In some alternative embodiments, the output power adjustment unit 2400 may further include:

[0142] The second power adjustment subunit is used to calculate the remaining power based on the full power and the current power of the current power output when the output power of the current channel decreases.

[0143] The second power calculation subunit is used to adjust the output power of the remaining power outputs other than the current power output to the target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

[0144] Those skilled in the art will clearly understand that, for the sake of convenience and indirectness, the structure and implementation principle of the device described above can be referred to the corresponding structure and implementation principle in the foregoing embodiments one to four, and will not be repeated here.

[0145] Example 6

[0146] In some alternative embodiments, this application also provides a switching power supply, which includes the power adaptive control device for the switching power supply as described above.

[0147] Those skilled in the art will clearly understand that, for the sake of convenience and indirectness, the structure and implementation principle of the switching power supply described above can be referred to the corresponding structure and implementation principle in the foregoing embodiments one to five, and will not be repeated here.

[0148] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A power adaptive control method for a switching power supply, characterized in that, include: The operating states of all power outputs of the switching power supply are obtained, wherein the switching power supply has at least two power outputs, and the operating states include power-on state and power-off state; When it is confirmed that at least two power outputs in the switching power supply are in the power-on state, the current power of each power output in the power-on state is obtained; The power change information of each power output is calculated based on the historical output power data and the corresponding current power of each power output. The maximum allowable output power of each power output is set according to the power change information of each power output and the full power of the switching power supply; After the step of obtaining the operating states of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs and the operating states include a power-on state and a power-off state, the method further includes: When it is confirmed that only one power output in the switching power supply is in the power-on state, the required power of the power output in the power-on state is obtained; Adjust the actual output power of the power output when the device is in the power-on state according to the required power.

2. The power adaptive control method for a switching power supply as described in claim 1, characterized in that, The step of calculating the power change information of each power output based on the historical output power data and the corresponding current power of each power output includes: For each power output, acquire historical data of the output power of the corresponding power output within a preset time period; The power change information of the corresponding power output is obtained by calculating the difference between the current power output and the historical data for the same power output.

3. The power adaptive control method for a switching power supply as described in claim 1, characterized in that, The step of setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply includes: When the output power of the current power output increases, the output power of the remaining power outputs other than the current power output is reduced to a preset power, wherein the preset power is calculated by dividing the full power by the number of power outputs in the power-on state; The maximum allowable output power of the current channel is calculated based on the full power and the output power of the remaining power outputs.

4. The power adaptive control method for a switching power supply as described in claim 1, characterized in that, The step of setting the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply includes: When the output power of the current power output channel decreases, the remaining power is calculated based on the full power and the current power output of the current power output channel. Adjust the output power of all power outputs except the current one to the target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

5. A power adaptive control device for a switching power supply, characterized in that, include: The operating status acquisition unit is used to acquire the operating status of all power outputs of the switching power supply, wherein the switching power supply has at least two power outputs, and the operating status includes power-on status and power-off status. The current power acquisition unit is used to acquire the current power of each power output that is in the power-on state when it is confirmed that at least two power outputs in the switching power supply are in the power-on state. The power change information calculation unit is used to calculate the power change information of each power output based on the historical output power data and the corresponding current power of each power output. The output power adjustment unit is used to set the maximum allowable output power of each power output based on the power change information of each power output and the full power of the switching power supply. The device includes: The power demand acquisition unit is used to acquire the power demand of the power output that is in the power-on state when it is confirmed that only one power output in the switching power supply is in the power-on state. The actual output power adjustment unit is used to adjust the actual output power of the power output when the machine is on, according to the required power.

6. The power adaptive control device for a switching power supply as described in claim 5, characterized in that, The power change information calculation unit includes: The historical data acquisition subunit is used to acquire historical data of the output power of each power output within a preset time period for each power output. The difference calculation subunit is used to calculate the difference between the current power of the same power output and the historical data to obtain the power change information of the corresponding power output.

7. The power adaptive control device for a switching power supply as described in claim 5, characterized in that, The allowable output power adjustment unit further includes: The first power adjustment subunit is used to reduce the output power of the remaining power outputs other than the current power output to a preset power when the output power of the current power output increases. The preset power is calculated by dividing the full power by the number of power outputs in the power-on state. The first power calculation subunit is used to calculate the maximum allowable output power of the current channel based on the full power and the output power of the remaining power outputs.

8. The power adaptive control device for a switching power supply as described in claim 5, characterized in that, The allowable output power adjustment unit further includes: The second power adjustment subunit is used to calculate the remaining power based on the full power and the current power output of the current channel when the power change information of the current channel's power output is a decrease in output power; The second power calculation subunit is used to adjust the output power of the remaining power outputs other than the current power output to the target power, wherein the target power is calculated by dividing the remaining power by the number of the remaining power outputs.

9. A switching power supply, characterized in that, The switching power supply includes a power adaptive control device for a switching power supply as described in any one of claims 5 to 8.

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