Power supply control method, device and system

Abstract

The application provides a power supply control method, device and system. The power supply control method comprises the following steps: collecting output current of the power supply system, determining a load rate according to the output current; determining a first number of boost branches in which a boost module works and a second number of voltage regulation branches in which a voltage regulation module works according to the load rate; determining target boost branches and target voltage regulation branches according to the first number and the second number; controlling conduction of the target boost branches and the target voltage regulation branches; and outputting an output signal of the power supply to the load after boosting and voltage regulation. The application can improve the light load efficiency of the power supply system.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply control method, device and system. Background Technology

[0002] In existing technologies, power supply systems in scenarios such as data centers require 24-hour uninterrupted operation with large load fluctuations. These systems typically require 1+1 redundancy and batteries as backup. Due to this 1+1 redundancy, the maximum load rate of this power supply system is less than 50%, meaning it operates under very light loads for extended periods, resulting in lower system efficiency under light loads.

[0003] A common method to improve efficiency under light loads is to use module hibernation. This involves multiple modules connected in parallel; under light loads, some modules enter hibernation, thereby increasing the load rate of other modules and improving efficiency. The hibernation modules are controlled by a monitoring system based on the total system load. However, this method has a long hibernation and wake-up process, which may affect the battery during sudden load changes. Furthermore, the hibernation modules maintain internal power supply operation to ensure communication, resulting in some power loss. Additionally, module hibernation has certain application limitations for power supply systems. Summary of the Invention

[0004] One objective of this application is to provide a power supply control method to improve the light-load efficiency of a power supply system. Another objective of this application is to provide a power supply control device. A further objective of this application is to provide a power supply control system.

[0005] To achieve the above objectives, this application discloses a power supply control method applied to a power supply system. The power supply system includes a power supply and a multi-channel interleaved parallel circuit. The multi-channel interleaved parallel circuit includes at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel.

[0006] The power supply control method includes:

[0007] Collect the output current of the power supply system and determine the load rate based on the output current;

[0008] The first number of boost branches operating in the boost module and the second number of voltage regulating branches operating in the voltage regulating module are determined based on the load rate.

[0009] The target boost branch and the target voltage regulation branch are determined based on the first quantity and the second quantity. The conduction of the target boost branch and the target voltage regulation branch is controlled to boost and regulate the output signal of the power supply and then output it to the load.

[0010] Optionally, before determining the first number of boost branches operating in the boost module and the second number of regulating branches operating in the voltage regulating module based on the load rate, the power supply control method further includes:

[0011] Determine the correspondence between the load rate and the number of boost branches operating in the boost module and the number of voltage regulating branches operating in the voltage regulating module.

[0012] Optionally, determining the correspondence between the load rate and the number of boost branches operating in the boost module and the number of regulating branches operating in the voltage regulating module includes:

[0013] Determine the power loss of the power supply system under different load rates, different numbers of working boost branches, and different numbers of working voltage regulating branches;

[0014] The number of boost branches with the minimum power loss corresponding to different load rates is determined as the first number, and the number of voltage regulating branches is determined as the second number.

[0015] Optionally, determining the load rate based on the output current includes:

[0016] Determine the load power based on the output current;

[0017] The load rate is determined based on the load power and the total power of the power supply system.

[0018] Optionally, determining the target boost branch and the target voltage regulating branch based on the first quantity and the second quantity includes:

[0019] Based on the first quantity, determine the first stagger angle of the working boost branch, determine the first current angle corresponding to the target boost branch, and determine the target boost branch based on the first current angle.

[0020] The second staggered angle of the working voltage regulating branch is determined based on the second quantity, the second current angle corresponding to the target voltage regulating branch is determined, and the target voltage regulating branch is determined based on the second current angle.

[0021] Optionally, determining the first stagger angle of the working boost branch based on the first quantity includes:

[0022] The first staggered angle is obtained by dividing 360 degrees by the first quantity.

[0023] Optionally, determining the second staggered angle of the operating voltage regulating branch based on the second quantity includes:

[0024] The second staggered angle is obtained by dividing 360 degrees by the second quantity.

[0025] Optionally, controlling the conduction of the target boost branch and the target voltage regulating branch to boost and regulate the output signal of the power supply before outputting it to the load includes:

[0026] Control the conduction of each target boost branch, disconnect the target voltage regulating branch, and boost the output signal of the power supply through the target boost branch;

[0027] Control the conduction of each target voltage regulation branch, and then regulate the boosted output signal through the target voltage regulation branch before outputting it to the load.

[0028] This application also discloses a power supply control device applied to a power supply system. The power supply system includes a power supply and a multi-channel interleaved parallel circuit. The multi-channel interleaved parallel circuit includes at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel.

[0029] The power supply control device includes:

[0030] The load rate determination module is used to collect the output current of the power supply system and determine the load rate based on the output current.

[0031] A branch selection module is used to determine, based on the load rate, a first number of boost branches operated by the boost module and a second number of voltage regulating branches operated by the voltage regulating module;

[0032] The power supply control module is used to determine the target boost branch and the target voltage regulation branch according to the first quantity and the second quantity, control the conduction of the target boost branch and the target voltage regulation branch, and boost and regulate the output signal of the power supply before outputting it to the load.

[0033] This application also discloses a power supply control system, including a power supply system and a power supply control device as described above;

[0034] The power supply system includes a power supply and multiple interleaved parallel circuits. The multiple interleaved parallel circuits include at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel.

[0035] Optionally, the boost module includes eight boost branches connected in parallel, and the voltage regulating module includes eight voltage regulating branches connected in parallel.

[0036] Optionally, the boost branch is a boost circuit, and the voltage regulation branch is a buck circuit.

[0037] This application's power supply system includes a power supply and multiple interleaved parallel circuits. Each interleaved parallel circuit includes at least one boost module and one voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel. During power supply control, the output current of the power supply system is collected, and the load rate is determined based on the output current. Based on the load rate, a first number of boost branches operating in the boost module and a second number of voltage regulating branches operating in the voltage regulating module are determined. Based on the first and second numbers, target boost branches and target voltage regulating branches are determined, and the conduction of the target boost branches and target voltage regulating branches is controlled to boost and regulate the output signal of the power supply before outputting it to the load. Therefore, this application determines the corresponding number of operating boost branches and voltage regulating branches for different load rates, allowing one or more of the boost branches and voltage regulating branches to stop operating when the power supply system is under light load, reducing power loss and improving the light load efficiency of the power supply system. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a power supply system in the prior art is shown;

[0040] Figure 2 A schematic diagram showing the relationship between the efficiency of a power supply system and its load rate;

[0041] Figure 3 This diagram shows a schematic of the power supply system in a specific embodiment of the power supply control method of this application;

[0042] Figure 4 A flowchart illustrating a specific embodiment of the power supply control method of this application is shown;

[0043] Figure 5 A schematic diagram showing a specific example of the power supply system in the power supply control method of this application is provided.

[0044] Figure 6A flowchart illustrating a specific embodiment S000 of the power supply control method of this application is shown;

[0045] Figure 7 A flowchart illustrating a specific embodiment S100 of the power supply control method of this application is shown;

[0046] Figure 8 A flowchart illustrating a specific embodiment S200 of the power supply control method of this application is shown;

[0047] Figure 9 A flowchart illustrating a specific embodiment S300 of the power supply control method of this application is shown;

[0048] Figure 10 A comparison diagram showing the efficiency of the prior art and that of the present application is presented in a specific embodiment of the power supply control method of the present application;

[0049] Figure 11 This diagram illustrates a specific embodiment of the power supply control device of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In existing technologies, power supply systems in scenarios such as data centers require 24 / 7 uninterrupted operation and experience large load fluctuations. These systems typically require 1+1 redundancy and batteries as backup. Currently, DC power supply systems are commonly used, with batteries directly connected in parallel to the DC bus as backup power. In recent years, medium-voltage 10kVac DC-to-DC systems have emerged, such as... Figure 1 As shown, this system integrates a 10kVac power distribution unit, a phase-shifting transformer, a DC rectifier power supply, and an output power distribution unit, directly reducing the medium-voltage 10kV to 240Vdc or 336Vdc. The battery is also directly connected in parallel to the DC bus.

[0053] Due to its 1+1 redundancy, this power supply system has a maximum load factor of less than 50%, meaning it operates under very light loads for extended periods. The efficiency of a power supply system is related to its load factor; please refer to [reference needed]. Figure 2 The power supply system is very inefficient when the load is below 20%, but more efficient when the load is between 30% and 70%.

[0054] Currently, improving efficiency under light loads typically involves module hibernation. When the power supply system is under light load, some modules are put into hibernation to improve efficiency. However, this method has several problems. Both module hibernation and wake-up require a monitoring system. This system, controlling module hibernation or wake-up via communication, takes a considerable amount of time. Furthermore, when the load changes abruptly, the monitoring system may not be able to wake up the hibernating modules in time, causing the power supply battery to charge and discharge. Additionally, to maintain communication during hibernation, the internal power supply must continue operating, resulting in energy loss. Moreover, module hibernation causes variations in the secondary winding power of the phase-shifting transformer in the power supply system, affecting the total harmonic distortion (iTHD) and limiting its application in 10kVac DC-DC power supply systems.

[0055] To address the above problems, this application proposes a power supply method that can improve the light-load efficiency of a power supply system. The method involves collecting the output current of the power supply system, determining the load rate based on the output current, determining the first number of boost branches operating in the boost module and the second number of voltage regulating branches operating in the voltage regulating module based on the load rate, determining the target boost branches and target voltage regulating branches based on the first and second numbers, controlling the conduction of the target boost branches and target voltage regulating branches, and boosting and regulating the output signal of the power supply before outputting it to the load. This application can improve the light-load efficiency of the power supply system without requiring the entire boost and voltage regulating modules to enter a dormant state, maintaining a high level of efficiency for the power supply system under 5%-70% load. Furthermore, this application does not have the limitation of dormant wake-up time. Parallel module dormant technology carries the risk of battery charging and discharging during sudden load changes, while this application, since it does not involve the entire module entering a dormant state, has no impact on the parallel batteries. This application can be used in medium-voltage 10kVac DC-to-DC systems without the problem of current sharing in the secondary winding. However, the parallel module dormancy technology will cause the current in the secondary winding of the phase-shifting transformer to be unbalanced, thereby affecting the iTHD of the input current.

[0056] According to one aspect of this application, this embodiment discloses a power supply control method. For example... Figure 3As shown, the power supply system includes a power supply 1 and multiple interleaved parallel circuits. Each interleaved parallel circuit includes at least one boost module 2 and a voltage regulating module 3 connected in series between the power supply 1 and the load 4. The boost module 2 includes multiple boost branches connected in interleaved parallel, and the voltage regulating module 3 includes multiple voltage regulating branches connected in interleaved parallel. Specifically, the boost module 2 may include n branches such as boost branch 1, boost branch 2, ..., boost branch n, and the voltage regulating module 2 may include n branches such as voltage regulating branch 1, voltage regulating branch 2, ..., voltage regulating branch n, where n is a positive integer greater than or equal to 2.

[0057] like Figure 4 As shown, in this embodiment, the method includes:

[0058] S100: Collects the output current of the power supply system and determines the load rate based on the output current.

[0059] S200: Determine the first number of boost branches operating in boost module 2 and the second number of voltage regulating branches operating in voltage regulating module 3 based on the load rate.

[0060] S300: Determine the target boost branch and the target voltage regulation branch according to the first quantity and the second quantity, control the conduction of the target boost branch and the target voltage regulation branch, and output the output signal of the power supply to the load 4 after boosting and regulating the voltage.

[0061] The power supply system of this application includes a power supply 1 and multiple interleaved parallel circuits. Each interleaved parallel circuit includes at least one boost module 2 and a voltage regulating module 3 connected in series between the power supply 1 and the load 4. The boost module 2 includes multiple boost branches connected in interleaved parallel, and the voltage regulating module 3 includes multiple voltage regulating branches connected in interleaved parallel. This power supply system adopts a two-stage power supply architecture of boost module 2 and voltage regulating module 3, and both modules have multiple interleaved parallel branches. When the load 4 is large, this effectively reduces the ripple of the input and output currents, resulting in uniform heat distribution and better heat dissipation for the power devices.

[0062] During power supply control, the output current of the power supply system is collected, and the load rate is determined based on the output current. Based on the load rate, a first number of boost branches operating in boost module 2 and a second number of voltage regulating branches operating in voltage regulating module 3 are determined. Based on the first and second numbers, target boost branches and target voltage regulating branches are determined, and their conduction is controlled. The output signal of the power supply is boosted and regulated before being output to load 4. Therefore, this application determines the corresponding number of operating boost branches and voltage regulating branches for different load rates. This allows one or more of the boost branches and voltage regulating branches to stop operating when the power supply system is under light load, reducing power loss and improving the light-load efficiency of the power supply system.

[0063] In an optional implementation, the target boost branch and the target voltage regulation branch operate by the controller (or control circuit or control chip) outputting different or the same high and low voltage signals. The high and low voltage signals can control the switching transistors in the target boost branch and the target voltage regulation branch to turn on and off, thereby realizing the conduction of the target boost branch and the target voltage regulation branch.

[0064] In alternative implementations, such as Figure 5 As shown, the boost module 2 includes eight boost branches connected in parallel, and the voltage regulating module 3 includes eight voltage regulating branches connected in parallel. Of course, in practical applications, those skilled in the art can set the number of boost branches in the boost module 2 and the number of voltage regulating branches in the voltage regulating module 3 according to actual needs, and this application does not limit this.

[0065] In an optional implementation, the boost branch can be a boost circuit, and the voltage regulation branch can be a buck circuit. The specific circuit structures of the boost circuit and buck circuit are conventional techniques in the art, and those skilled in the art can configure the specific circuit structures of the boost branch of the boost module 2 and the voltage regulation branch of the voltage regulation module 3 according to actual needs; these will not be elaborated further here.

[0066] In a specific example, boost module 2 includes eight boost branches connected in parallel, and voltage regulating module 3 includes eight voltage regulating branches connected in parallel. The boost branches can be boost circuits, and the voltage regulating branches can be buck circuits. Figure 5As shown, the first to fourth boost branches of boost module 2 each include at least one first inductor L1, one first diode D1, and one first switching element T1. Furthermore, the first to fourth boost branches of boost module 2 share a first capacitor C1. One end of the first inductor L1 is connected to the positive output terminal of the power supply 1, and the other end is connected to the anode of the first diode D1 and the first terminal of the first switching element T1. The cathode of the first diode D1 is connected to the first terminal of the first capacitor C1, the second terminal of the first capacitor C1 is connected to the negative output terminal of the power supply, and the second terminal of the first switching element T1 is connected to the negative output terminal of the power supply. The control terminal of the first switching element T1 is connected to the first signal line that receives the first control signal, which controls the conduction of the first switching element T1. Similarly, the fifth to eighth boost branches of boost module 2 each include at least one first inductor L1, one first diode D1, and one first switching element T1. Furthermore, the fifth to eighth boost branches of boost module 2 share a first capacitor C1. In this configuration, one end of the first inductor L1 is connected to the positive output terminal of the power supply 1, and the other end is connected to the anode of the first diode D1 and the first terminal of the first switching element T1. The cathode of the first diode D1 is connected to the first terminal of the first capacitor C1, the second terminal of the first capacitor C1 is connected to the negative output terminal of the power supply, the second terminal of the first switching element T1 is connected to the negative output terminal of the power supply, and the control terminal of the first switching element T1 is connected to the first signal line that receives the first control signal. This first control signal can control the conduction of the first switching element T1.

[0067] The first to fourth voltage regulating branches of the voltage regulating module 3 each include at least: a second inductor L2, a second diode D2, and a second switching element T2. Furthermore, the first to fourth voltage regulating branches of the voltage regulating module 3 share a second capacitor C2.

[0068] The first terminal of the second switching element T2 is connected to the boost module 2, specifically to the cathode of the first diode D1 and the first terminal of the first capacitor C1. The control terminal of the second switching element T2 is connected to the second signal line that inputs the second control signal, which controls the conduction of the second switching element T2. The cathode of the second diode D2 is connected to the second terminal of the second switching element T2 and the first terminal of the second inductor L2, respectively. The anode of the second diode D2 is connected to the negative output terminal of the power supply 1. The second terminal of the second inductor L2 is connected to the first terminal of the second capacitor C2, and the second terminal of the second capacitor C2 is connected to the negative output terminal of the power supply 1. Similarly, the 5th to 8th voltage regulating branches of the voltage regulating module 3 each include at least one second inductor L2, one second diode D2, and one second switching element T2. Furthermore, the 5th to 8th voltage regulating branches of the voltage regulating module 3 share a single second capacitor C2. In this configuration, the first terminal of the second switching element T2 is connected to the boost module 2, specifically to the cathode of the first diode D1 and the first terminal of the first capacitor C1. The control terminal of the second switching element T2 is connected to the second signal line that receives the second control signal, which controls the conduction of the second switching element T2. The cathode of the second diode D2 is connected to the second terminal of the second switching element T2 and the first terminal of the second inductor L2, respectively. The anode of the second diode D2 is connected to the negative output terminal of the power supply 1. The second terminal of the second inductor L2 is connected to the first terminal of the second capacitor C2, and the second terminal of the second capacitor C2 is connected to the negative output terminal of the power supply 1.

[0069] It should be noted that, in this specific example, the first switching element T1 can be a MOS switch, which can be an NMOS or a PMOS transistor. Those skilled in the art can set the control signals for the MOS transistor's on and off according to the actual situation, which will not be elaborated here. Of course, in other embodiments, other first switching elements T1 can also be used, and this application does not limit them.

[0070] In an optional embodiment, the power supply 1 can be a three-phase (R, S, T) power supply. The power supply system also includes an input filter circuit 5 and a rectifier circuit 6 disposed between the power supply 1 and the boost module 2. The power supply system may also include an output filter circuit 7 disposed between the voltage regulating module 3 and the load 4. The specific circuit structures of the input filter circuit 5, the rectifier circuit 6, and the output filter circuit 7 are common knowledge in the art and will not be described in detail here.

[0071] Understandably, each branch of the power supply system is equipped with individual switching elements and magnetic components. When the load rate is high, such as when the load rate exceeds 80%, all branches of the boost module 2 and voltage regulation module 3 will usually be in operation. However, when the load rate is low (light load), such as when the load rate is less than 30%, the ripple is smaller and the heat generation of the power devices is also smaller. In order to reduce power loss, some branches of the boost module 2 and voltage regulation module 3 can be suspended from operation, thereby reducing the switching losses of semiconductor switching elements and the core losses of magnetic components such as inductors in each branch, thus improving the light load efficiency of the power supply system.

[0072] In an optional implementation, the method further includes determining, before determining the first number of boost branches operating in boost module 2 and the second number of regulating branches operating in voltage regulating module 3 based on the load rate:

[0073] S000: Determine the correspondence between the load rate and the number of boost branches operating in boost module 2 and the number of voltage regulating branches operating in voltage regulating module 3.

[0074] Specifically, it can be understood that before actually controlling the power supply system, the optimal number of boost and voltage regulating branches operating under different load rates can be determined through loss analysis or experiments. This involves pre-setting the correspondence between load rate and the number of operating boost and voltage regulating branches. Therefore, during the power supply process, the output current Iout of the power supply system can be collected. Based on the output current Iout, the real-time load rate of the power supply system can be determined. Then, based on the correspondence between the real-time load rate and the number of operating boost and voltage regulating branches at different load rates, the number of operating boost and voltage regulating branches corresponding to the real-time load rate can be determined. This allows for the control of each boost and voltage regulating branch to operate or be suspended, ensuring the power supply system operates at its optimal efficiency under the real-time load rate.

[0075] In alternative implementations, such as Figure 6 As shown, S000 determines the correspondence between the load rate and the number of boost branches operating in boost module 2 and the number of regulating branches operating in voltage regulating module 3, including:

[0076] S010: Determine the power loss of the power supply system under different load rates, different numbers of working boost branches, and different numbers of working voltage regulating branches.

[0077] S020: Determine the number of boost branches with the minimum power loss corresponding to different load rates as the first quantity, and the number of voltage regulating branches as the second quantity.

[0078] Specifically, it can be understood that we can first determine all feasible schemes for the number of working branches of the boost and voltage regulating branches. Then, through loss analysis or experiments, we can determine the first and second numbers of boost and voltage regulating branches that operate with the highest efficiency under different load rates, respectively. This establishes a correspondence between different load rates and the first and second numbers of boost and voltage regulating branches, facilitating the determination of the optimal number of working boost and voltage regulating branches when the real-time load rate is obtained. For example, in a specific case, through experimental measurement and calculation, it is found that when the load rate is <20%, the first and second numbers are 2; when the load rate is 20%-40%, the first and second numbers are 4; when the load rate is 40%-60%, the first and second numbers are 6; and when the load rate is 60%-100%, the first and second numbers are 8.

[0079] For example, the efficiency of a power supply system can be obtained by dividing the output power by the input power, based on the calculated output power and input power of the power supply system.

[0080] In an optional implementation, S100 collects the output current Iout of the power supply system, including:

[0081] S110: The output current Iout of the power supply system is acquired through the output current Iout sampling circuit.

[0082] It is understood that the output current Iout of the power supply system can be collected through the existing output current Iout sampling circuit of the power supply system, or an additional output current Iout sampling circuit can be set up to sample the output current Iout of the power supply system. This application does not limit this.

[0083] In alternative implementations, such as Figure 7 As shown, S100 determines the load factor based on the output current Iout, including:

[0084] S120: Determine the load power based on the output current Iout.

[0085] S130: Determine the load rate based on the load power and the total power of the power supply system.

[0086] Specifically, it can be understood that the load power can be calculated based on the collected output current Iout of the power supply system, and then the load factor of the power supply system can be obtained by dividing the load power by the total power. The determination of the load power and the total power is a conventional technique in this field and will not be elaborated upon here.

[0087] In alternative implementations, such as Figure 8 As shown, S200 determines the target boost branch and the target voltage regulating branch based on the first quantity and the second quantity, including:

[0088] S210: Determine the first staggered angle of the working boost branch based on the first quantity, determine the first current angle corresponding to the target boost branch, and determine the target boost branch based on the first current angle.

[0089] S220: Determine the second staggered angle of the working voltage regulating branch according to the second quantity, determine the second current angle corresponding to the target voltage regulating branch, and determine the target voltage regulating branch according to the second current angle.

[0090] Specifically, it can be understood that the first number of working boost branches and the second number of working voltage regulating branches can be determined based on the real-time load rate to achieve optimal overall efficiency of the power supply system. Furthermore, to achieve optimal ripple current, a first staggered angle between the first number of boost branches and a second staggered angle between the second number of voltage regulating branches can be determined. Based on the first staggered angle, a first current angle of the target boost branches is determined, and thus a first number of target boost circuits are selected. Based on the second staggered angle, a second current angle of the target voltage regulating branches is determined, and thus a second number of target voltage regulating branches are selected to operate, achieving optimal input / output ripple current for the power supply system.

[0091] In an optional implementation, S210 determining the first stagger angle of the working boost branch based on the first quantity includes:

[0092] S211: The first staggered angle is obtained by dividing 360 degrees by the first quantity.

[0093] For example, if the load rate is <20%, the first number is 2 channels. 360 divided by 2 equals 180, meaning two boost branches staggered by 180 degrees should be selected to operate, and the other branches should be suspended. When the load rate is between 20% and 40%, the first number is 4 channels. Similarly, four boost branches staggered by 90 degrees should be selected to operate, and the other branches should be suspended. When the load rate is between 40% and 60%, the first number is 6 channels. Similarly, four boost branches staggered by 60 degrees should be selected to operate, and the other branches should be suspended. When the load rate is between 60% and 100%, the first number is 8 channels. Similarly, four boost branches staggered by 45 degrees should be selected to operate, and the other branches should be suspended.

[0094] In an optional implementation, S220 determines the second stagger angle of the operating voltage regulating branch based on the second quantity, including:

[0095] S221: The second staggered angle is obtained by dividing 360 degrees by the second quantity.

[0096] For example, if the load rate is <20%, the second quantity is 2 channels. 360 divided by 2 equals 180, meaning that two voltage regulating branches staggered by 180 degrees should be selected to operate in the working state, and the other branches should be suspended. When the load rate is between 20% and 40%, the second quantity is 4 channels. Similarly, four voltage regulating branches staggered by 90 degrees should be selected to operate in the working state, and the other branches should be suspended. When the load rate is between 40% and 60%, the second quantity is 6 channels. Similarly, four voltage regulating branches staggered by 60 degrees should be selected to operate in the working state, and the other branches should be suspended. When the load rate is between 60% and 100%, the second quantity is 8 channels. Similarly, four voltage regulating branches staggered by 45 degrees should be selected to operate in the working state, and the other branches should be suspended.

[0097] In alternative implementations, such as Figure 9 As shown, S300 controls the conduction of the target boost branch and the target voltage regulation branch, boosting and regulating the output signal of the power supply before outputting it to the load 4, including:

[0098] S310: Controls the conduction of each target boost branch, disconnects the target voltage regulation branch, and boosts the output signal of the power supply through the target boost branch.

[0099] S320: Disconnect the target boost branch, control the conduction of each target voltage regulation branch, and output the boosted output signal to the load 4 after voltage regulation through the target voltage regulation branch.

[0100] Understandably, to minimize the capacitor ripple current in the power supply system, the conduction of boost module 2 and voltage regulating module 3 can be controlled to ensure they operate at the same frequency. When the switching element of boost module 2 is off, current flows into voltage regulating module 3, at which point the switch of voltage regulating module 3 is turned on, reducing the capacitor current ripple between boost module 2 and voltage regulating module 3, thereby improving the efficiency of the power supply system. Specifically, a first number of target boost branches with a first interleaving angle and a second number of target voltage regulating branches with a second interleaving angle can be selected. Then, a first control signal is sequentially input to the control terminal of the switching element of each target boost branch through a first signal line to control the conduction of each target boost branch, ensuring that the current angle of each target boost branch is related to the first interleaving angle. The second control signal is sequentially input to the control terminal of the switching element of each target voltage regulation branch through the second signal line to control the conduction of each target voltage regulation branch, so that the current angle of each target voltage regulation branch is related to the second interleaving angle, and at the same time, the operating frequency of the boost module 2 and the voltage regulation module 3 is the same, so that the capacitor current ripple between the two stages of boost module 2 and voltage regulation module 3 is reduced, thereby improving the efficiency of the power supply system.

[0101] In summary, this application determines the number of corresponding boost and voltage regulating branches for different load rates, which can stop one or more of the boost and voltage regulating branches when the power supply system is lightly loaded, thereby reducing the power loss of switching and magnetic components and improving the light-load efficiency of the power supply system. Figure 10 A graph showing a specific example of the efficiency of a 10kVac direct-to-DC power supply system is presented, comparing the original efficiency using existing technology with the optimized efficiency under the present application.

[0102] Based on the same principle, this application also discloses a power supply control device. The power supply system includes a power supply 1 and a multi-channel interleaved parallel circuit. The multi-channel interleaved parallel circuit includes at least one boost module 2 and a voltage regulating module 3 connected in series between the power supply 1 and the load 4. The boost module 2 includes multiple boost branches connected in interleaved parallel, and the voltage regulating module 3 includes multiple voltage regulating branches connected in interleaved parallel.

[0103] like Figure 11 As shown, in this embodiment, the power supply control device includes a load rate determination module 11, a branch selection module 12, and a power supply control module 13.

[0104] The load rate determination module 11 is used to collect the output current Iout of the power supply system and determine the load rate based on the output current Iout.

[0105] The branch selection module 12 is used to determine the first number of boost branches that the boost module 2 operates and the second number of voltage regulating branches that the voltage regulating module 3 operates based on the load rate.

[0106] The power supply control module 13 is used to determine the target boost branch and the target voltage regulation branch according to the first quantity and the second quantity, control the conduction of the target boost branch and the target voltage regulation branch, and output the output signal of the power supply to the load 4 after boosting and regulating the voltage.

[0107] In an optional implementation, the branch selection module 12 is further configured to determine the correspondence between the load rate and the number of boost branches operated by the boost module 2 and the number of voltage regulating branches operated by the voltage regulating module 3 before determining the first number of boost branches operated by the boost module 2 and the second number of voltage regulating branches operated by the voltage regulating module 3 based on the load rate.

[0108] In an optional implementation, the branch selection module 12 is specifically used to determine the power loss of the power supply system under different load rates, different numbers of working boost branches, and different numbers of working voltage regulating branches; and to determine the number of boost branches with the minimum power loss corresponding to different load rates as a first number, and the number of voltage regulating branches as a second number.

[0109] In an optional implementation, the load rate determination module 11 is used to acquire the output current Iout of the power supply system through the output current Iout sampling circuit.

[0110] In an optional implementation, the load rate determination module 11 is used to determine the load power 4 based on the output current Iout; and to determine the load rate based on the load power 4 and the total power of the power supply system.

[0111] In an optional implementation, the power supply control module 13 is used to determine the first staggered angle of the working boost branch according to the first quantity, determine the first current angle corresponding to the target boost branch, and determine the target boost branch according to the first current angle; determine the second staggered angle of the working voltage regulating branch according to the second quantity, determine the second current angle corresponding to the target voltage regulating branch, and determine the target voltage regulating branch according to the second current angle.

[0112] In an optional implementation, the power supply control module 13 is used to obtain a first staggered angle by dividing 360 degrees by a first quantity.

[0113] In an optional implementation, the power supply control module 13 is used to obtain the second staggered angle by dividing 360 degrees by a second quantity.

[0114] In an optional implementation, the power supply control module 13 is used to control the conduction of each target boost branch, disconnect the target voltage regulating branch, boost the output signal of the power supply through the target boost branch; control the conduction of each target voltage regulating branch, regulate the boosted output signal through the target voltage regulating branch, and output it to the load 4.

[0115] Since the principle by which this device solves the problem is similar to the methods described above, the implementation of this device can be found in the implementation of the methods, and will not be repeated here.

[0116] Based on the same principle, this application also discloses a power supply control system. The power supply control system includes a power supply system and the power supply control device involved in the embodiments of this application.

[0117] The power supply system includes a power supply and multiple interleaved parallel circuits. The multiple interleaved parallel circuits include at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel.

[0118] In one possible embodiment, the boost module includes eight boost branches connected in parallel, and the voltage regulating module includes eight voltage regulating branches connected in parallel.

[0119] In one possible embodiment, the boost branch is a boost circuit and the voltage regulation branch is a buck circuit.

[0120] Since the principle of this system in solving the problem is similar to the above methods, the implementation of this power supply control system can refer to the implementation of all power supply control methods involved in this application, and will not be repeated here.

[0121] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0122] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A power supply control method, characterized in that, The invention is applied to a power supply system, which includes a power supply and a multi-channel interleaved parallel circuit. The multi-channel interleaved parallel circuit includes at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel. The power supply control method includes: Collect the output current of the power supply system and determine the load rate based on the output current; The first number of boost branches operating in the boost module and the second number of voltage regulating branches operating in the voltage regulating module are determined based on the load rate. The target boost branch and the target voltage regulating branch are determined according to the first quantity and the second quantity, and the conduction of the target boost branch and the target voltage regulating branch is controlled to boost and regulate the output signal of the power supply and then output it to the load. Before determining the first number of boost branches operating in the boost module and the second number of regulating branches operating in the voltage regulating module based on the load rate, the power supply control method further includes: Determine the correspondence between the load rate and the number of boost branches operating in the boost module and the number of voltage regulating branches operating in the voltage regulating module; Determining the correspondence between the load rate and the number of boost branches operating in the boost module and the number of regulating branches operating in the regulating module includes: Determine the power loss of the power supply system under different load rates, different numbers of working boost branches, and different numbers of working voltage regulating branches; The number of boost branches with the minimum power loss corresponding to different load rates is determined as the first number, and the number of voltage regulating branches is determined as the second number.

2. The power supply control method according to claim 1, characterized in that, Determining the load rate based on the output current includes: Determine the load power based on the output current; The load rate is determined based on the load power and the total power of the power supply system.

3. The power supply control method according to claim 1, characterized in that, The step of determining the target boost branch and the target voltage regulating branch based on the first quantity and the second quantity includes: Based on the first quantity, determine the first stagger angle of the working boost branch, determine the first current angle corresponding to the target boost branch, and determine the target boost branch based on the first current angle. The second staggered angle of the working voltage regulating branch is determined based on the second quantity, the second current angle corresponding to the target voltage regulating branch is determined, and the target voltage regulating branch is determined based on the second current angle.

4. The power supply control method according to claim 3, characterized in that, The first stagger angle of the boost branch determined according to the first quantity includes: The first staggered angle is obtained by dividing 360 degrees by the first quantity.

5. The power supply control method according to claim 3, characterized in that, The second staggered angle of the voltage regulating branch determined according to the second quantity includes: The second staggered angle is obtained by dividing 360 degrees by the second quantity.

6. The power supply control method according to claim 1, characterized in that, The step of controlling the conduction of the target boost branch and the target voltage regulating branch, and boosting and regulating the output signal of the power supply before outputting it to the load, includes: Control the conduction of each target boost branch, disconnect the target voltage regulating branch, and boost the output signal of the power supply through the target boost branch; Control the conduction of each target voltage regulation branch, and then regulate the boosted output signal through the target voltage regulation branch before outputting it to the load.

7. A power supply control device, characterized in that, The invention is applied to a power supply system, which includes a power supply and a multi-channel interleaved parallel circuit. The multi-channel interleaved parallel circuit includes at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel. The power supply control device includes: The load rate determination module is used to collect the output current of the power supply system and determine the load rate based on the output current. A branch selection module is used to determine, based on the load rate, a first number of boost branches operated by the boost module and a second number of voltage regulating branches operated by the voltage regulating module; The power supply control module is used to determine the target boost branch and the target voltage regulating branch according to the first quantity and the second quantity, control the conduction of the target boost branch and the target voltage regulating branch, and boost and regulate the output signal of the power supply before outputting it to the load; Before determining the first number of boost branches operating in the boost module and the second number of regulating branches operating in the voltage regulating module based on the load rate, the power supply control device further includes: The correspondence determination module is used to determine the correspondence between the load rate and the number of boost branches operated by the boost module and the number of voltage regulating branches operated by the voltage regulating module; Determining the correspondence between the load rate and the number of boost branches operating in the boost module and the number of regulating branches operating in the regulating module includes: Determine the power loss of the power supply system under different load rates, different numbers of working boost branches, and different numbers of working voltage regulating branches; The number of boost branches with the minimum power loss corresponding to different load rates is determined as the first number, and the number of voltage regulating branches is determined as the second number.

8. A power supply control system, characterized in that, Includes a power supply system and a power supply control device as described in claim 7; The power supply system includes a power supply and multiple interleaved parallel circuits. The multiple interleaved parallel circuits include at least one boost module and a voltage regulating module connected in series between the power supply and the load. The boost module includes multiple boost branches connected in interleaved parallel, and the voltage regulating module includes multiple voltage regulating branches connected in interleaved parallel.

9. The power supply control system according to claim 8, characterized in that, The boost module includes eight boost branches connected in parallel, and the voltage regulating module includes eight voltage regulating branches connected in parallel.

10. The power supply control system according to claim 8, characterized in that, The boost branch is a boost circuit, and the voltage regulation branch is a buck circuit.

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