A power supply system and its control method, storage medium, and program product

Abstract

This invention discloses a power supply system and its control method, storage medium, and program product, relating to the field of power supply technology. In the voltage conversion circuit, each single-phase voltage conversion module corresponds to a set of loads. The output terminals of all single-phase voltage conversion modules are interconnected, and each single-phase voltage conversion module operates under the control of the same controller, thereby ensuring the consistency of the output voltage to each set of loads. This avoids interference such as crosstalk noise caused by inconsistent power supply to the loads, ensuring accurate operation of the loads. Simultaneously, when the controller controls each single-phase voltage conversion module to perform voltage conversion, it uses a current detection circuit to obtain the operating current of each single-phase voltage conversion module. By adding a current feedback loop design, the control signal output to each single-phase voltage conversion module is adjusted, resulting in stronger anti-interference capability of the current signal. This improves the anti-interference capability and stability of the power supply system, ensuring normal power supply.

Description

Technical Field

[0001] This invention relates to the field of power supply technology, and in particular to a power supply system and its control method, storage medium, and program product. Background Technology

[0002] With the surge in network data volume and service volume, high-throughput switches for heavy-duty data exchange are widely used in various large data centers, leading to the widespread adoption of 64-port 400G optical switches. Each optical module in such a switch has a power consumption of nearly 15W, resulting in a total power consumption of nearly 1 kilowatt and an operating current of nearly 300A for the entire 64-port switch. Therefore, powering optical switches effectively presents a significant challenge. Existing technologies primarily employ two methods for powering optical switches. The first method uses multiple separate power supply units to power individual optical modules. However, because these power supply units operate independently, maintaining consistent power supply to each module is difficult, leading to crosstalk noise in the power supply circuit and causing data packet loss, thus affecting communication efficiency. The second method uses a single power supply unit to power all optical modules. However, this method involves varying distances between the modules and the power supply unit, making voltage feedback design complex. Voltage differences due to varying line distances also affect the power supply unit's voltage regulation accuracy, resulting in data packet loss.

[0003] It is evident that providing an accurate and reliable power supply solution for optical switches is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a power supply system and its control method, storage medium, and program product that can solve the power supply problem of optical switches.

[0005] To address the aforementioned technical problems, embodiments of the present invention provide a power supply system, comprising:

[0006] The voltage conversion circuit includes several single-phase voltage conversion modules. Each single-phase voltage conversion module corresponds to a set of loads, and its output terminal is connected to the corresponding set of loads. The output terminals of all single-phase voltage conversion modules are interconnected.

[0007] The current detection circuit has its input terminals connected to each single-phase voltage conversion module in the voltage conversion circuit, and is used to detect the operating current of each single-phase voltage conversion module.

[0008] The controller's input terminal is connected to the output terminal of the current detection circuit, and its output terminal is connected to the control terminal of each single-phase voltage conversion module. It is used to adjust the control signal output to the corresponding single-phase voltage conversion module based on the operating current of each single-phase voltage conversion module.

[0009] Optional, the single-phase voltage conversion module includes:

[0010] The first switching transistor has its first terminal connected to the positive terminal of the power supply.

[0011] The second switching transistor has its first terminal serving as the negative output terminal of the single-phase voltage conversion module, connected to the negative terminal of the power supply, and grounded.

[0012] The inductor's first end is connected to the second end of the first switching transistor and the second end of the second switching transistor, respectively. The second end serves as the positive output terminal of the single-phase voltage conversion module and is connected to the positive output terminals of other single-phase voltage conversion modules besides itself.

[0013] Optionally, the current sensing circuit includes:

[0014] The first current extraction module has a first input terminal connected to the second terminal of the first switching transistor, a second input terminal connected to the second terminal of the second switching transistor and the first terminal of the inductor respectively, and an output terminal connected to the input terminal of the controller, and is used to extract the first current flowing through the first switching transistor;

[0015] The second current extraction module has a first input terminal connected to the second terminal of the second switching transistor, a second input terminal connected to the second terminal of the first switching transistor and the first terminal of the inductor, and an output terminal connected to the input terminal of the controller. It is used to extract the second current flowing through the second switching transistor.

[0016] Optionally, the current detection circuit may also include:

[0017] The adder has its first input terminal connected to the output terminal of the first current extraction module, its second input terminal connected to the output terminal of the second current extraction module, and its output terminal connected to the input terminal of the controller. It is used to determine the sum of the first current and the second current, and outputs the sum as the operating current of the single-phase voltage conversion module to the controller.

[0018] Optionally, both the first current extraction module and the second current extraction module are current mirrors.

[0019] Optionally, each single-phase voltage conversion module can be set up adjacent to a corresponding set of loads.

[0020] Optional, also includes:

[0021] The voltage detection circuit has its input terminals connected to the output terminals of each single-phase voltage conversion module in the voltage conversion circuit, and its output terminal connected to the voltage reading terminal of the controller. It is used to detect the output voltage of each single-phase voltage conversion module.

[0022] The controller is also used to adjust the control signal output to the corresponding single-phase voltage conversion module based on the output voltage of each single-phase voltage conversion module.

[0023] Optionally, the voltage detection circuit includes:

[0024] A plurality of near-end voltage detection modules are connected one-to-one with a plurality of single-phase voltage conversion modules. The first input terminal is connected to the positive output terminal of the corresponding single-phase voltage conversion module, the second input terminal is connected to the negative output terminal of the corresponding single-phase voltage conversion module, the first output terminal is connected to the first voltage reading terminal of the controller, and the second output terminal is connected to the second voltage reading terminal of the controller.

[0025] Several remote voltage detection modules are connected one-to-one with several single-phase voltage conversion modules. The first input terminal is connected to the positive power supply terminal of the corresponding load, the second input terminal is connected to the negative power supply terminal of the corresponding load, the first output terminal is connected to the first voltage reading terminal of the controller, and the second output terminal is connected to the second voltage reading terminal of the controller.

[0026] Optionally, the near-end voltage detection module includes:

[0027] The first capacitor has its two pins connected in parallel to the output of the corresponding single-phase voltage conversion module.

[0028] The first resistor has its first end connected to the second side of the first pin of the first capacitor, and its second end connected to the first voltage reading terminal of the controller.

[0029] The second resistor has its first end connected to the second side of the second pin of the first capacitor, and its second end connected to the second voltage reading terminal of the controller.

[0030] Optionally, the remote voltage detection module includes:

[0031] The second capacitor has its first side of the two pins connected in parallel with the power supply terminal of the corresponding load.

[0032] The third resistor has its first end connected to the second side of the first pin of the second capacitor, and its second end connected to the first voltage reading terminal of the controller.

[0033] The fourth resistor has its first end connected to the second side of the second pin of the second capacitor, and its second end connected to the second voltage reading terminal of the controller.

[0034] Optionally, the voltage detection circuit may also include:

[0035] The voltage signal processing module has a first input terminal connected to the first output terminal of each near-end voltage detection module and each far-end voltage detection module, a second input terminal connected to the second output terminal of each near-end voltage detection module and each far-end voltage detection module, and an output terminal connected to the voltage reading terminal of the controller. It is used to superimpose the output voltages of all single-phase voltage conversion modules and feed them back to the controller.

[0036] Optionally, the voltage signal processing module includes:

[0037] The fifth resistor has its first end connected to the first output end of each near-end voltage detection module and each far-end voltage detection module, respectively.

[0038] The sixth resistor has its first end connected to the first voltage reading terminal of the controller, the second output terminal of each near-end voltage detection module, and the second output terminal of each far-end voltage detection module, respectively, and its second end connected to the second end of the fifth resistor and the second voltage reading terminal of the controller, respectively.

[0039] Optionally, the voltage signal processing module also includes:

[0040] The filtering module has its first input terminal connected to the first output terminal of each near-end voltage detection module and each far-end voltage detection module, its second input terminal connected to the second output terminal of each near-end voltage detection module and each far-end voltage detection module, its first output terminal connected to the first terminal of the fifth resistor, and its second output terminal connected to the first terminal of the sixth resistor and the first voltage reading terminal of the controller.

[0041] Optionally, the voltage signal processing module also includes:

[0042] The zero-point compensation module has its output terminals connected to the output terminals of the voltage signal processing module and the voltage reading terminals of the controller, respectively, to provide the controller with a zero-point compensation.

[0043] Optionally, the zero-point compensation module is a third capacitor. The first end of the third capacitor is connected to the first end of the fifth resistor, the first output end of each near-end voltage detection module, and the first output end of each far-end voltage detection module, respectively. The second end is connected to the second end of the fifth resistor, the second end of the sixth resistor, and the second voltage reading end of the controller, respectively.

[0044] Optionally, for any near-end voltage detection module, the resistance values ​​of the first resistor and the second resistor are both negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module and the controller.

[0045] Optionally, for any remote voltage detection module, the resistance values ​​of the third resistor and the fourth resistor are negatively correlated with the arrangement distance between the corresponding load and the controller.

[0046] To address the aforementioned technical problems, embodiments of the present invention also provide a control method for a power supply system, applied to a controller of the power supply system as described above. The control method for the power supply system includes:

[0047] The operating current of each single-phase voltage conversion module is obtained through the current detection circuit of the power supply system.

[0048] The control signal output to the corresponding single-phase voltage conversion module is adjusted based on the operating current of each single-phase voltage conversion module.

[0049] To address the aforementioned technical problems, this invention also provides a non-volatile storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps of the aforementioned power supply system control method.

[0050] To address the aforementioned technical problems, embodiments of the present invention also provide a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the aforementioned power supply system control method.

[0051] As can be seen from the above technical solution, each single-phase voltage conversion module in the voltage conversion circuit corresponds to a set of loads. The output terminals of all single-phase voltage conversion modules are interconnected, and each single-phase voltage conversion module operates under the control of the same controller. When the controller controls each single-phase voltage conversion module to perform voltage conversion, it uses a current detection circuit to obtain the operating current of each single-phase voltage conversion module. The beneficial effect of this invention is that by using the connection topology of the single-phase voltage conversion modules, the consistency of the output voltage to each set of loads is ensured, thereby avoiding crosstalk noise and other interference caused by inconsistent load power supply, and ensuring the accurate operation of the load. At the same time, by adding a current feedback loop design to adjust the control signal output to each single-phase voltage conversion module, the anti-interference capability of the current signal is stronger, thereby improving the anti-interference capability and stability of the power supply system and ensuring the normal power supply of the power supply system. Attached Figure Description

[0052] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 A schematic diagram of a power supply system provided in an embodiment of the present invention;

[0054] Figure 2 This is a schematic diagram of another power supply system provided in an embodiment of the present invention;

[0055] Figure 3 This is a schematic diagram of the structure of a single-phase voltage conversion module provided in an embodiment of the present invention;

[0056] Figure 4 A schematic diagram of the waveform change of the operating current of a single-phase voltage conversion module provided in an embodiment of the present invention;

[0057] Figure 5 This is a schematic diagram of a voltage detection circuit provided in an embodiment of the present invention;

[0058] Figure 6 This is a wiring diagram of a voltage detection circuit provided in an embodiment of the present invention;

[0059] Figure 7 This is a schematic diagram of the device routing of a voltage detection circuit provided in an embodiment of the present invention;

[0060] Figure 8 A flowchart illustrating a control method for a power supply system provided in an embodiment of the present invention;

[0061] Figure 9 This is a schematic diagram of the structure of a controller provided in an embodiment of the present invention. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0063] The terms "comprising" and "having," and any variations thereof, in the specification and accompanying drawings of this invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may include steps or units not listed.

[0064] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] Next, a power supply system provided by an embodiment of the present invention will be described in detail. See also Figure 1 As shown, Figure 1 This is a schematic diagram of a power supply system provided in an embodiment of the present invention. The power supply system includes:

[0066] The voltage conversion circuit includes several single-phase voltage conversion modules Ph. Each single-phase voltage conversion module Ph corresponds to a set of loads, and its output terminal is connected to the corresponding set of loads. The output terminals of all single-phase voltage conversion modules Ph are interconnected.

[0067] The current detection circuit 1 has its input terminals connected to each single-phase voltage conversion module Ph in the voltage conversion circuit, and is used to detect the operating current of each single-phase voltage conversion module Ph.

[0068] The controller 2 has its input terminal connected to the output terminal of the current detection circuit 1, and its output terminal connected to the control terminal of each single-phase voltage conversion module Ph. It is used to adjust the control signal output to the corresponding single-phase voltage conversion module Ph based on the operating current of each single-phase voltage conversion module Ph.

[0069] Understandably, to avoid crosstalk and other issues caused by inconsistent power supply voltages to different load groups, this invention employs a single voltage conversion circuit to power all loads. Furthermore, to avoid issues such as power concentration, heat dissipation difficulties, and challenges in concentrated board space layout, the voltage conversion circuit utilizes multiple single-phase voltage conversion modules (Ph) connected in parallel. All loads are divided into several corresponding load groups, with the output of each single-phase voltage conversion module (Ph) connected one-to-one with its corresponding load group. When the voltage conversion circuit is supplying power, the output voltage of each single-phase voltage conversion module (Ph) primarily powers its corresponding load group. During motherboard layout design, each single-phase voltage conversion module (Ph) is positioned close to its corresponding load group. Therefore, the single-phase voltage conversion modules (Ph) in the entire voltage conversion circuit are distributed based on the load groups, thus avoiding power concentration, reducing heat dissipation difficulties, and facilitating layout design. Simultaneously, connecting the outputs of each single-phase voltage conversion module (Ph) together ensures the consistency of their output voltages. From both layout design and circuit topology design perspectives, multiple measures are taken to ensure the consistency of the output voltage of each single-phase voltage conversion module Ph, thereby avoiding the impact of crosstalk noise and other interference signals on the normal communication and data transmission of the load.

[0070] It should be noted that only one controller 2 exists in the voltage conversion circuit to control the operation of multiple single-phase voltage conversion modules Ph. The control signals for each single-phase voltage conversion module Ph are generated by the same signal generator. This ensures the consistency of the output voltage of each single-phase voltage conversion module Ph from the perspective of control signals, avoiding power supply differences caused by factors such as asynchronous control signals. Furthermore, each single-phase voltage conversion module Ph is designed to be close to its corresponding set of loads. In this case, the distance between controller 2 and the single-phase voltage conversion module Ph is relatively large. If controller 2 still relies solely on voltage feedback control, the voltage drop caused by the long connection line will interfere with the control. The control of each single-phase voltage conversion module Ph by controller 2 causes the entire control system to malfunction. Therefore, in this situation, a current feedback control loop needs to be established for controller 2. A current detection circuit 1 is designed to detect the operating current of each single-phase voltage conversion module Ph and feeds the detected operating current back to controller 2. Controller 2 controls each single-phase voltage conversion module Ph based on the feedback signals from the current and voltage feedback loops, achieving constant voltage output from multiple single-phase voltage conversion modules Ph. The fast current response and anti-interference capability ensure the normal operation of the entire control system, improving its anti-interference ability and stability. The current feedback network allows for flexible placement of multiple single-phase voltage conversion modules Ph in the centralized power supply voltage conversion circuit, especially close proximity to corresponding load groups, achieving a stable and reliable power supply system.

[0071] It is not difficult to understand that this application does not impose any special limitations on the specific types and implementation methods of the voltage conversion circuit, single-phase voltage conversion module Ph, current detection circuit 1, and controller 2. In the preferred embodiment of the voltage conversion circuit, each single-phase voltage conversion module Ph is implemented using a completely identical circuit topology, but different circuit topologies can also be used. The voltage conversion circuit can be a boost circuit or a buck circuit, etc., specifically designed according to the power supply requirements of the load. This application does not impose any special limitations on the control method of the controller 2 for the single-phase voltage conversion module Ph; it can use square wave signals, pulse width modulation signals, etc., to control the single-phase voltage conversion module Ph. The controller 2 can be designed using devices such as DSP (Digital Signal Processor), MCU (Microcontroller Unit), or integrated circuit (Integrated Circuit) for phase reversal controllers as its core, to control the power supply to complete its power supply function.

[0072] It is understood that this invention provides a power supply system and design method applicable to distributed optical module array scenarios. The individual single-phase voltage conversion modules (Ph) in the voltage conversion circuit of the power supply are adaptively distributed according to the load distribution while maintaining a common output. This reduces packet loss issues when different loads, i.e., different optical modules, communicate with the same MAC or PHY due to power supply differences. The distributed layout also reduces hotspot concentration, lowering the thermal design complexity of the entire circuit. Simultaneously, closed-loop current control is achieved by collecting the operating current of each single-phase voltage conversion module (Ph), enhancing the anti-interference capability of the entire control system, effectively improving the stability and reliability of the power supply system, and realizing the distributed layout and wiring of each Ph (phase).

[0073] It should be noted that this invention primarily considers the characteristic of optical modules in optical switches having their power-consuming ends arranged in a regular, dispersed array. For example, n optical modules are arranged horizontally within a 19-inch wide motherboard. This characteristic leads to problems such as noise, packet loss, and heat dissipation in the overall system power supply. Therefore, this invention provides a power supply system design method for the array distribution of optical modules in optical switches. This power supply system can be extended to power supply designs for loads arranged in rows or where the load power input points are discrete and far apart, and can be applied to the power supply design of loads with similar power consumption characteristics to optical modules in optical switches. Furthermore, when grouping loads, they can also be grouped according to their distribution layout, grouping one or more adjacent loads together. This application does not specifically limit the specific grouping method of the loads.

[0074] It's easy to understand that controller 2 not only needs to output control signals to each single-phase voltage conversion module Ph, but also needs to acquire feedback signals such as the operating current of each single-phase voltage conversion module Ph. Therefore, controller 2 and each single-phase voltage conversion module Ph can directly establish a bidirectional communication connection, using a single communication port to simultaneously realize data input and output. When controlling each single-phase voltage conversion module Ph, controller 2 can perform in-phase control and out-of-phase control according to actual application requirements. The switching transistors of each phase work alternately on different phases. Through reasonable phase arrangement, the inductor currents of each phase are staggered in time, jointly providing a stable current to the load. For example, in-phase control can be achieved by controlling the first switching transistor Q1 of all single-phase voltage conversion modules Ph to work synchronously.

[0075] As one specific embodiment, see Figure 2 As shown, Figure 2This is a schematic diagram of another power supply system provided in an embodiment of the present invention; it implements a power supply system and design method for an optical module array distribution. The power supply system includes a controller and signal, a Phm power stage as a single-phase voltage conversion module, and n optical modules as loads. Here, m and n are natural numbers greater than 1. In a preferred embodiment, n is an integer multiple of m to ensure the consistency of each load group and facilitate power supply balance for each single-phase voltage conversion module, such as n=m, n=2m, n=4m, etc. This embodiment uses n=2m as an example for illustration.

[0076] Controller 2 transmits data directly to each single-phase voltage conversion module Ph via communication signals Ph1_S1…Phm_Sm. Signal Phhm_Sm includes, but is not limited to, pulse width modulation control signals, enable signals, temperature signals, and current feedback signals used to control the operation of the single-phase voltage conversion modules Ph. The current feedback signal not only provides controller 2 with current state information for each single-phase voltage conversion module Ph but also participates in pulse width modulation, giving the entire distributed power supply system strong anti-interference and stability. Controller 2 simultaneously acquires the voltage feedback differential signal Phhm_Vsense from each single-phase voltage conversion module Ph. The voltage feedback differential signal Phhm_Vsense includes both the far-end and near-end feedback differential signals of each single-phase voltage conversion module Ph. All voltage feedback signals from each single-phase voltage conversion module Ph are fed back to controller 2, forming an umbrella-shaped signal feedback structure. Adjusting the series resistance matching impedance in the feedback structure according to the impedance relationship further meets the voltage regulation accuracy requirements of the power supply system. One specific embodiment is that the Phm power stage can use a single-phase buck power conversion main power circuit, the number of which is proportional to the number of optical modules, and the circuit is evenly distributed near the corresponding optical modules in the layout.

[0077] This invention proposes a power supply system and design method suitable for distributed load arrays, and proposes a current synthesis and current feedback anti-interference design and method. A voltage conversion circuit comprising multiple single-phase voltage conversion modules is used to reliably supply power to the distributed loads. The multiple single-phase voltage conversion modules are distributed to disperse heat sources and solve the heat dissipation problem. The multiple single-phase voltage conversion modules achieve a common output, avoiding crosstalk noise caused by inconsistent power supply received by different load groups. A current feedback loop is designed to improve the anti-interference and stability of the power supply system, ensuring the normal operation of the entire control system.

[0078] See Figure 3 As shown, Figure 3 This is a schematic diagram of a single-phase voltage conversion module provided in an embodiment of the present invention; as an optional embodiment, the single-phase voltage conversion module Ph includes:

[0079] The first switching transistor Q1 has its first terminal connected to the positive terminal of the power supply.

[0080] The second switch Q2 has its first terminal serving as the negative output terminal of the single-phase voltage conversion module Ph, connected to the negative terminal of the power supply, and grounded.

[0081] The inductor L0 has its first end connected to the second end of the first switch Q1 and the second end of the second switch Q2, respectively. Its second end serves as the positive output terminal of the single-phase voltage conversion module Ph, and is connected to the positive output terminals of other single-phase voltage conversion modules Ph, excluding itself.

[0082] It's easy to understand that the single-phase voltage conversion module Ph can be implemented using a buck circuit. The power stage consists of the core components, a first switch Q1 and a second switch Q2. The controller 2 supplies power by controlling the on / off state of the first and second switches Q1 and Q2. During the on-state, the first switch Q1 connects the input power supply to the inductor L0, allowing L0 to store energy. During the off-state, the second switch Q2 conducts, providing a freewheeling path for the inductor current, releasing the energy from inductor L0 to the load. For example... Figure 3 As shown, capacitor C0 can be connected in parallel between the two input terminals of the buck circuit and capacitor C1 can be connected in parallel between the two output terminals of the buck circuit for filtering, thereby improving the accuracy and reliability of the buck circuit power supply and realizing a Phm power stage composed of a power stage and input / output filtering circuits. Vin represents the input voltage of the single-phase voltage conversion module, and Vout represents the output voltage of the single-phase voltage conversion module.

[0083] It should be noted that this application does not impose any special limitations on the specific types and implementation methods of the power supply, the first switching transistor Q1, the second switching transistor Q2, and the inductor L0, such as... Figure 3 As shown, a MOSFET can be used for implementation. The output voltage of the power supply can be selected and set according to the actual power supply requirements of the load and the specific design of the buck circuit. Furthermore, the second switch Q2 can be implemented using a diode, which can prevent current backflow while providing power, further protecting the single-phase voltage conversion module Ph. Alternatively, a diode can be connected in series at the second terminal of the inductor L0 to prevent current backflow. Each single-phase voltage conversion module Ph in the voltage conversion circuit can be implemented using the method provided in this embodiment, or other implementation methods can be selected; this application does not impose any particular limitations here. The specific control method of the controller 2 for the first switch Q1 and the second switch Q2 is not particularly limited here; it can be implemented using pulse width modulation signals, etc.

[0084] Specifically, the single-phase voltage conversion module Ph can be implemented using a buck circuit consisting of a first switch Q1, a second switch Q2, and an inductor L0. The entire circuit structure is simple and easy to implement, which facilitates the simple implementation of the entire voltage conversion circuit. It can convert the power supply to a lower stable output voltage, and by adjusting the duty cycle of the two switches, different voltage outputs can be achieved to meet the power supply requirements of different loads.

[0085] See Figure 4 As shown, Figure 4 A schematic diagram of the waveform change of the operating current of a single-phase voltage conversion module provided in an embodiment of the present invention; as an optional embodiment, the current detection circuit 1 includes:

[0086] The first current extraction module has a first input terminal connected to the second terminal of the first switching transistor Q1, a second input terminal connected to the second terminal of the second switching transistor Q2 and the first terminal of the inductor L0 respectively, and an output terminal connected to the input terminal of the controller 2, and is used to extract the first current flowing through the first switching transistor Q1.

[0087] The second current extraction module has a first input terminal connected to the second terminal of the second switch Q2, a second input terminal connected to the second terminal of the first switch Q1 and the first terminal of the inductor L0 respectively, and an output terminal connected to the input terminal of the controller 2. It is used to extract the second current flowing through the second switch Q2.

[0088] Understandably, to facilitate the controller 2 in obtaining the operating current of each single-phase voltage conversion module Ph, this embodiment provides a design method for current synthesis and current feedback. Considering that the buck circuit mainly relies on the operation of the first switch Q1 and the second switch Q2 to achieve power supply, for any single-phase voltage conversion module Ph, a first current extraction module and a second current extraction module are set up to obtain the current flowing through the first switch Q1 and the current flowing through the second switch Q2 in the single-phase voltage conversion module Ph, respectively. Therefore, it is necessary to set up several first current extraction modules and several second current extraction modules corresponding one-to-one with several single-phase voltage conversion modules Ph. The controller 2 determines the operating current of each single-phase voltage conversion module Ph through the corresponding first current extraction module and second current extraction module. This application does not make any special limitations on the specific type and implementation method of the first current extraction module and the second current extraction module. The corresponding mirror current can be generated by using current mirror or other methods to achieve current extraction.

[0089] Specifically, each single-phase voltage conversion module Ph has a corresponding current feedback signal. The controller 2 uses the operating current of each single-phase voltage conversion module Ph to participate in the control signal adjustment of the single-phase voltage conversion module Ph, which makes the power supply system have good stability and reliability. This provides a design basis for the distributed layout of each single-phase voltage conversion module Ph, so as to disperse hotspots and reduce the difficulty of thermal design.

[0090] As an optional embodiment, the current detection circuit 1 further includes:

[0091] The adder has its first input terminal connected to the output terminal of the first current extraction module, its second input terminal connected to the output terminal of the second current extraction module, and its output terminal connected to the input terminal of the controller 2. It is used to determine the sum of the first current and the second current, and outputs the sum as the working current of the single-phase voltage conversion module Ph to the controller 2.

[0092] It is easy to understand that for the single-phase voltage conversion module Ph implemented with a buck circuit, its actual operating current should be the inductor current flowing through inductor L0. Therefore, after obtaining the first and second currents, an adder is needed to combine the two currents. The combined current is directly output as the operating current of the single-phase voltage conversion module Ph to controller 2, so that controller 2 can directly control the system based on the combined current. This application does not specifically limit the specific type and implementation method of the adder.

[0093] As a specific embodiment, such as Figure 3 As shown, I up The current source is a mirror of the first switch Q1, with a mirror ratio of f, I down This is a current mirror source for the second switch Q2, with a mirror ratio of f, where f > 0. up and I down After compensation, I is synthesized via an adder. L I up To ensure a proportional current is generated in the connection circuit of the first switch Q1 through a mirror current source, I down To ensure that the proportional current generated by the mirrored current source in the connection circuit of the second switch Q2 is consistent with the first switch Q1, the proportional current sources of the second switch Q2 are combined into a new current source by an adder, I. L I is the output current of the current source. L This refers to the current feedback signal of each single-phase voltage conversion module Ph in the power supply system of this embodiment, which is fed back to controller 2 to participate in pulse width adjustment, ensuring the stability and reliability of the power supply system for each single-phase voltage conversion module Ph. L =I up +I down Its waveform is as follows Figure 4 As shown, Figure 4 The figure shows the current feedback signal waveform of a single-phase voltage conversion module Ph. During the time interval t1-t2, I... up The value of I increases from I1 to I3; during the time interval t2-t3, I... down The I value decreases from I3 to I1, and the synthesis of I over a period of time (t1-t3) completes one cycle. L Waveform; I up and I down Two mirror current sources of the same proportion are superimposed by an adder to form a new current source I. L The synthesized waveform is as follows Figure 4 The waveform is shown below. This current waveform I... L It can be used to provide feedback on the actual operating current waveform of each single-phase voltage conversion module Ph.

[0094] It should be noted that the current source signal I L Feedback is sent to controller 2 for two purposes. First, it is used to calculate the output current of each single-phase voltage conversion module Ph, thereby summing the overall output current of the power supply system, which is the final load current and the total supply current of the load optical modules. This is then combined with the voltage feedback signal to monitor the power of the entire power supply system. Second, it is used to participate in the pulse width adjustment of the PID algorithm inside controller 2, rapidly adjusting the pulse width of the control signal corresponding to the single-phase voltage conversion module Ph with a 90° phase lead. The rapid leading response of the current signal and the strong anti-interference capability of the current source signal ensure that the distributed power supply system still has good system stability and power supply reliability even with a discrete layout. By using a synthesized current source to participate in closed-loop control to enhance the anti-interference capability of the control system, each single-phase voltage conversion module Ph has a synthesized current feedback signal I. L It not only provides feedback on the current status of each single-phase voltage conversion module Ph and adjusts it through pulse width modulation, but also provides the output current information of each single-phase voltage conversion module Ph for the overall power consumption detection of controller 2.

[0095] As an optional embodiment, both the first current extraction module and the second current extraction module are current mirrors.

[0096] It is understood that the first and second current extraction modules can specifically employ a current mirror to achieve the current extraction process. Using a current mirror to acquire current provides high accuracy and can fully reflect the actual operating current of each single-phase voltage conversion module Ph. This application does not impose any specific limitations on the specific structure and implementation of the current mirror.

[0097] Specifically, the operating current of each single-phase voltage conversion module Ph is formed by superimposing the mirror current sources of two switching transistors through an adder. The waveform of the synthesized current source is similar to the waveform of the output inductor L0 of the single-phase voltage conversion module Ph. After compensation by voltage and temperature signals, its current waveform is closer to the actual current waveform of power conversion, making the current signal participating in pulse adjustment more accurate and ensuring the high stability and reliability of the power supply system.

[0098] As an optional embodiment, each single-phase voltage conversion module Ph is arranged adjacent to a corresponding set of loads.

[0099] It's easy to understand that, in order to further avoid the impact of voltage drop on the accuracy and reliability of the single-phase voltage conversion module Ph when the power supply line distance is too long, the actual layout of the load is considered when designing the power supply system layout. Each single-phase voltage conversion module Ph is placed adjacent to its corresponding set of loads. Generally, both the load and the power supply system are set on the main board of the equipment. Adjacent placement means that the distance between the single-phase voltage conversion module Ph and its corresponding set of loads on the main board is small, thereby minimizing the distance of the power supply line between the single-phase voltage conversion module Ph and its corresponding set of loads and reducing the impact of line voltage difference on the power supply.

[0100] Specifically, based on the current feedback control, the layout design can minimize the impact of line voltage difference on power supply imbalance by placing each single-phase voltage conversion module Ph adjacent to its corresponding set of loads, thereby improving the power supply regulation accuracy of each single-phase voltage conversion module Ph and facilitating the main power supply of each single-phase voltage conversion module Ph to its corresponding set of loads.

[0101] See Figure 5 As shown, Figure 5 This is a schematic diagram of a voltage detection circuit provided in an embodiment of the present invention; see also Figure 6 As shown, Figure 6 A wiring diagram of a voltage detection circuit provided in an embodiment of the present invention; as an optional embodiment, it further includes:

[0102] The voltage detection circuit has its input terminals connected to the output terminals of each single-phase voltage conversion module Ph in the voltage conversion circuit, and its output terminal connected to the voltage reading terminal of the controller 2, for detecting the output voltage of each single-phase voltage conversion module Ph.

[0103] Controller 2 is also used to adjust the control signal output to the corresponding single-phase voltage conversion module Ph based on the output voltage of each single-phase voltage conversion module Ph.

[0104] It is understandable that controller 2 not only uses the current feedback signal to adjust the control signal of the single-phase voltage conversion module Ph, but also needs to acquire the voltage feedback signal of each single-phase voltage conversion module Ph to adjust its control signal. Therefore, the power supply system can also be equipped with a corresponding voltage detection circuit to detect the output voltage of each single-phase voltage conversion module Ph. Controller 2 also receives not only the current feedback signal of the single-phase voltage conversion module Ph, but also the corresponding voltage feedback signal. This application does not specifically limit the specific type and implementation method of the voltage detection circuit.

[0105] Furthermore, after acquiring the current and voltage feedback signals of each single-phase voltage conversion module Ph, controller 2 can further obtain the output power corresponding to each single-phase voltage conversion module Ph, thereby performing power management and power monitoring for each single-phase voltage conversion module Ph and the entire voltage conversion circuit. For example, under normal circumstances, each optical module requires a fixed and consistent power supply voltage. Controller 2 can combine voltage and current feedback signals to control the constant voltage output of each single-phase voltage conversion module Ph. When controller 2 receives the voltage feedback signal, it compares the feedback voltage signal with the set target voltage value and calculates the difference to obtain the voltage error signal. When the feedback voltage signal differs significantly from the target voltage, it adjusts the duty cycle of the pulse width modulation signal output to the corresponding single-phase voltage conversion module Ph, thereby ensuring the constant voltage output of each single-phase voltage conversion module Ph. At the same time, since the current feedback signal has a faster response speed and stronger anti-interference capability, controller 2 also needs to determine the load change information based on the current feedback signal, which helps to control the output voltage more accurately. Specifically, PID control or other methods can be used to control each single-phase voltage conversion module Ph.

[0106] Specifically, the dual closed-loop structure of current feedback control and voltage feedback control helps controller 2 achieve more accurate and reliable power supply control. Controller 2 can have a more comprehensive understanding of the circuit's operating status, has a stronger ability to adapt to various disturbances and load changes, thereby improving the stability of the entire power supply system, and can adjust the output more precisely to meet the constant voltage output accuracy requirements of different loads.

[0107] As an optional embodiment, the voltage detection circuit includes:

[0108] A plurality of near-end voltage detection modules are connected one-to-one with a plurality of single-phase voltage conversion modules Ph. The first input terminal is connected to the positive output terminal of the corresponding single-phase voltage conversion module Ph, the second input terminal is connected to the negative output terminal of the corresponding single-phase voltage conversion module Ph, the first output terminal is connected to the first voltage reading terminal of the controller 2, and the second output terminal is connected to the second voltage reading terminal of the controller 2.

[0109] Several remote voltage detection modules are connected one-to-one with several single-phase voltage conversion modules Ph. The first input terminal is connected to the positive power supply terminal of the corresponding load, the second input terminal is connected to the negative power supply terminal of the corresponding load, the first output terminal is connected to the first voltage reading terminal of the controller 2, and the second output terminal is connected to the second voltage reading terminal of the controller 2.

[0110] Considering that when the actual single-phase voltage conversion module Ph supplies power to each group of loads, there is still a certain distance between the single-phase voltage conversion module Ph and the corresponding load through the power supply line, the voltage drop caused by the impedance of these power supply lines will also affect the accuracy of the voltage feedback signal. Therefore, when obtaining the voltage feedback signal of the single-phase voltage conversion module Ph, the voltage detection circuit is specifically set with a near-end voltage detection module for detecting the output terminal of the single-phase voltage conversion module Ph and a far-end voltage detection module for detecting the voltage received at the power supply terminal of the load. For each single-phase voltage conversion module Ph, the controller 2 actually receives the result of the superposition of the two sets of voltage signals. At the same time, the voltage signals of all single-phase voltage conversion modules Ph are fed back from the same pair of voltage reading terminals of the controller 2, forming an umbrella network voltage feedback design, that is, an umbrella topology with the voltage reading terminal of the controller 2 as the endpoint and the far-end detection point and near-end detection point of each single-phase voltage conversion module Ph as the starting point. The design employs an umbrella-shaped voltage differential feedback network to mitigate packet loss caused by voltage imbalance at the near and far ends of arrayed optical module loads, ensuring that each load group receives an accurate and effective power supply voltage. This application does not specify the particular types or implementation methods of the near-end and far-end voltage detection modules.

[0111] Specifically, this invention proposes a current-driven multiphase power supply design scheme, which combines an umbrella network feedback method to achieve reliable power supply to the load in a distributed power supply system for multiphase single-path power supply. It proposes an umbrella network voltage feedback design and a layout and wiring design to solve the potential power supply imbalance problem for each optical module, i.e., each group of loads, ensuring that each group of loads receives an accurate and effective power supply voltage. This not only solves the packet loss and efficiency degradation problem caused by power supply issues in optical switches, but also reduces the power supply imbalance problem caused by inconsistent power supply lines when the optical module array is dispersed, i.e., when the loads are dispersed, while simultaneously distributing and balancing power loss and solving the problem of centralized heat dissipation difficulties.

[0112] See Figure 7 As shown, Figure 7 This is a schematic diagram of the device routing for a voltage detection circuit provided in an embodiment of the present invention. As an optional embodiment, the near-end voltage detection module includes:

[0113] The first capacitor C1 has its two pins connected in parallel to the output of the corresponding single-phase voltage conversion module Ph.

[0114] The first resistor R1 has its first end connected to the second side of the first pin of the first capacitor C1, and its second end connected to the first voltage reading terminal of the controller 2.

[0115] The second resistor R2 has its first end connected to the second side of the second pin of the first capacitor C1, and its second end connected to the second voltage reading terminal of the controller 2.

[0116] It is easy to understand that the near-end voltage detection module can be implemented using a series resistor feedback method. A set of differential voltage signals corresponding to the output of the single-phase voltage conversion module Ph is detected by setting a first resistor R1 and a second resistor R2. The first resistor R1 is connected in series with the positive output of the single-phase voltage conversion module Ph, and the second resistor R2 is connected in series with the negative output of the single-phase voltage conversion module Ph. Simultaneously, to achieve more accurate voltage detection, a first capacitor C1 is connected in parallel between the two outputs of the single-phase voltage conversion module Ph. The filtering effect of the first capacitor C1 improves the accuracy and reliability of the finally detected voltage signal. This application does not specifically limit the specific types and implementation methods of the first capacitor C1, the first resistor R1, and the second resistor R2. Generally, when the single-phase voltage conversion module Ph is implemented using a buck circuit, its output itself will have a capacitor connected in parallel. In this case, the first capacitor C1 can be directly reused from the capacitor already connected in parallel at the output of the buck circuit itself.

[0117] Specifically, the feedback voltage is detected and sampled by using a series resistor, while a parallel capacitor is added to improve the accuracy and reliability of the sampled voltage signal. The entire circuit structure is simple and easy to implement. The near-end voltage is detected by acquiring the differential signal between the two output terminals, which can effectively reduce the influence of interference on the detection results and is not easily affected by external electromagnetic fields and other factors, thus ensuring the accuracy of voltage feedback signal detection.

[0118] As an optional embodiment, the remote voltage detection module includes:

[0119] The second capacitor C2 has its first side of the two pins connected in parallel with the power supply terminal of the corresponding load.

[0120] The third resistor R3 has its first end connected to the second side of the first pin of the second capacitor C2, and its second end connected to the first voltage reading terminal of the controller 2.

[0121] The fourth resistor R4 has its first end connected to the second side of the second pin of the second capacitor C2, and its second end connected to the second voltage reading terminal of the controller 2.

[0122] It is easy to understand that the remote voltage detection module can be implemented using a series resistor feedback method. A third resistor R3 and a fourth resistor R4 are used to detect a set of differential voltage signals actually received by the load power supply terminal connected to the single-phase voltage conversion module Ph. The third resistor R3 is connected in series with the positive power supply terminal of the load, and the second resistor R2 is connected in series with the negative power supply terminal of the load. To achieve more accurate voltage detection, a second capacitor C2 is connected in parallel between the two power supply terminals of the load. The filtering effect of the second capacitor C2 improves the accuracy and reliability of the final detected voltage signal. This application does not specifically limit the specific types and implementation methods of the second capacitor C2, the third resistor R3, and the fourth resistor R4.

[0123] Specifically, the feedback voltage is detected and sampled by using a series resistor, while a parallel capacitor is added to improve the accuracy and reliability of the sampled voltage signal. The entire circuit structure is simple and easy to implement. The remote voltage is detected by acquiring the differential signal between the two power supply terminals, which can effectively reduce the influence of interference on the detection results and is not easily affected by external electromagnetic fields and other factors, thus ensuring the accuracy of voltage feedback signal detection.

[0124] As a specific embodiment, such as Figure 5 and Figure 6 As shown, both the near-end voltage detection module and the far-end voltage detection module use series resistor feedback to achieve voltage detection.

[0125] Pin 1 of the third resistor R3 is connected to pin 1 of the second capacitor C2 located at the power supply end of the load optical module. Pin 2 of the third resistor R3 in series with the remote feedback is connected to pin 2 of the capacitor C4 via pin 2 of the first resistor R1 in the near-end feedback, forming the positive voltage feedback network Ph1_Sense_DP. Pin 1 of the fourth resistor R4 in series with the remote feedback is connected to pin 2 of the second capacitor C2 located at the power supply end of the load optical module. Pin 2 of the fourth resistor R4 in series with the remote feedback is connected to pin 1 of the capacitor C4 via pin 2 of the second resistor R2 in the near-end feedback, forming the negative voltage feedback network Ph1_Sense_DN.

[0126] Pin 1 of the first resistor R1 in the near-end feedback series is connected to pin 1 of the first capacitor C1 set at the output of the first single-phase voltage conversion module Ph1. Pin 2 of the first resistor R1 in the near-end feedback series is connected to pin 2 of the third resistor R3 in the far-end feedback series to superimpose the voltage signal, and then connected to pin 2 of the capacitor C4 to form the positive voltage feedback network Ph1_Sense_DP. Pin 1 of the second resistor R2 in the near-end feedback series is connected to pin 2 of the first capacitor C1 set at the output of the first single-phase voltage conversion module Ph1. Pin 2 of the second resistor R2 in the near-end feedback series is connected to pin 2 of the fourth resistor R4 in the far-end feedback series to superimpose the voltage signal, and then connected to pin 1 of the capacitor C4 to form the negative voltage feedback network Ph1_Sense_DN. For any single-phase voltage conversion module, that is, from the first single-phase voltage conversion module Ph1 to the m-th single-phase voltage conversion module Phm, there are superimposed positive voltage signal Phm_Sense_DP and negative voltage signal Phm_Sense_DN. The differential voltage signals of all single-phase voltage conversion modules are then superimposed on both ends of capacitor C4 and transmitted to controller 2 through voltage divider network.

[0127] The series resistors R3 and R4 of the remote voltage detection module are positioned near the second capacitor C2, which is located at the power supply terminals of the corresponding loads, namely optical modules 1 and 2. They are placed side-by-side. Pins 1 of R3 and R4 are connected to pins 1 and 2 of the second capacitor C2, respectively. The sampling point of the input lead at pin 1 of R3 and R4 originates from the pin of the second capacitor C2, not from the copper layer of the power supply network. Sampling at the pin of the second capacitor C2 maximizes the low noise of the voltage feedback signal. The voltage feedback signal, after passing through the parallel-placed resistors R3 and R4, outputs a differential signal pair, Ph1_Sense_DP and Ph1_Sense_DN, at pins 2 of both resistors. The wiring layout of the lines containing resistors R3 and R4 is treated as differential signals to ensure they are free from noise interference during the feedback path. The voltage feedback signals Ph1_Sense_DP and Ph1_Sense_DN, output from pins 2 of the third resistor R3 and the fourth resistor R4, are input on one side and output on the other side of pins 2 of the corresponding near-end feedback resistors, the first resistor R1 and the second resistor R2. They continue to be routed in a differential pair layout to pins 1 and 2 of capacitor C4, maintaining the input-from-one-side-the-other-side-output pattern, and are output to the voltage divider network. The actual device signal routing is as follows: Figure 7As shown, the capacitors and resistors are all two-port devices with two pins each. The top and bottom ends are the device pins, and the middle is the device body. The arrows indicate the required PCB routing for the device signals, with input from one side of the pin and output from the other. The voltage feedback signal sampling point is not taken from the power supply line between the single-phase voltage conversion module Ph and the load, but instead is taken from the capacitor pins to ensure low noise in the voltage feedback signal to the greatest extent possible.

[0128] The sampling method for pin 1 of the near-end feedback resistors R1 and R2 is the same as that for pin 1 of the far-end feedback resistors R3 and R4, with separate leads brought out on the sampling capacitor pins. That is, pin 1 of the near-end feedback resistors R1 and R2 are routed through PCB traces independent of the current-carrying network and independent of the power supply traces of the single-phase voltage conversion module Ph itself, and are sampled at the pin of the corresponding output capacitor C1 of the single-phase voltage conversion module Ph.

[0129] The differential pair signals Ph1_Sense_DP and Ph1_Sense_DN are input on one side of pin 1 and pin 2 of capacitor C4 via PCB traces and output on the other side, thus providing the voltage divider network. The other side of pin 1 of capacitor C4 is traced to pin 1 of the sixth resistor R6, where it is input and output to the controller 2 as a negative signal DN. The other side of pin 2 of capacitor C4 is traced to pin 2 of the fifth resistor R5, where it is input, passes through the fifth resistor R5, and enters the sixth resistor R6 from pin 1, where it is output to the controller 2 as a positive signal DP. The other sides of pins 1 and 2 of the fifth resistor R5 are connected in parallel to the two pins of the compensation network device of the zero-point compensation module. m Ph signals and their corresponding load optical modules form m sets of near-end and far-end feedback networks, all connected to one side of the pins of capacitor C4, and fed back to the controller 2 via the voltage divider compensation network for functions such as pulse width modulation.

[0130] The third and fourth resistors, R3 and R4, of the far-end feedback series resistors are located near the second capacitor C2C2 at the corresponding load end; the first and second resistors, R1 and R2, of the near-end feedback series resistors are located near the output filter capacitor C1 of the corresponding single-phase voltage conversion module Ph; the voltage divider network, capacitor C4, and zero-point compensation module are located near the voltage feedback input pin of controller 2. All far-end and near-end voltage feedback networks of the single-phase voltage conversion modules Ph are routed differentially on the PCB. All sampling points are independently sampled at the corresponding capacitor pins, distinguishing them from the power supply copper traces within the same network. When the far-end differential pair signal is connected to the near-end feedback series resistor, it must enter from one pin side of the resistor and exit from the other side to avoid introducing high-frequency noise.

[0131] As an optional embodiment, the voltage detection circuit further includes:

[0132] The voltage signal processing module has a first input terminal connected to the first output terminal of each near-end voltage detection module and each far-end voltage detection module, a second input terminal connected to the second output terminal of each near-end voltage detection module and each far-end voltage detection module, and an output terminal connected to the voltage reading terminal of the controller 2. It is used to superimpose the output voltages of all single-phase voltage conversion modules Ph and feed them back to the controller 2.

[0133] Considering that the actual supply voltage output to each load group is the voltage after transformation by the voltage conversion circuit, its magnitude may exceed the range supported by the controller 2 itself. Furthermore, the differential voltage signals corresponding to the multiple single-phase voltage conversion modules Ph in the voltage conversion circuit all need to be output to the controller 2 for processing. Therefore, a voltage signal processing module is also included in the voltage feedback network. On the one hand, it can superimpose the output voltages of all single-phase voltage conversion modules Ph and feed them back to the controller 2. On the other hand, it performs voltage conversion, mainly voltage reduction, converting the differential voltage signals to the normal range that the controller 2 can receive and process, thus facilitating the operation of the controller 2. This application does not specifically limit the specific type and implementation method of the voltage signal processing module; it can be implemented using circuits such as voltage divider networks.

[0134] Specifically, all single-phase voltage conversion modules Ph will participate in voltage feedback. Therefore, a voltage signal processing module is needed to perform preliminary processing on the feedback voltage signal so that the controller 2 can receive the signal. The voltage differential feedback of each single-phase voltage conversion module Ph is completed through the remote end, near end and voltage divider compensation network, forming an umbrella-shaped feedback network, which can more accurately feed back the voltage information of each load point.

[0135] As an optional embodiment, the voltage signal processing module includes:

[0136] The fifth resistor R5 has its first end connected to the first output end of each near-end voltage detection module and each far-end voltage detection module, respectively.

[0137] The sixth resistor R6 has its first end connected to the first voltage reading terminal of the controller 2, the second output terminal of each near-end voltage detection module, and the second output terminal of each far-end voltage detection module, respectively, and its second end connected to the second end of the fifth resistor R5 and the second voltage reading terminal of the controller 2, respectively.

[0138] It is understood that the voltage signal processing module can be implemented using a voltage divider network consisting of the fifth resistor R5 and the sixth resistor R6. The voltage divider network is used to adjust the supply voltage value required by the load side, and its impedance is on the order of 1kΩ or higher. This application does not impose any special limitations on the specific impedance values ​​and implementation methods of the fifth resistor R5 and the sixth resistor R6; they can be selected and set according to the power supply size of the power supply system and the actual situation of the controller 2 in the actual application.

[0139] Specifically, a voltage divider circuit can effectively superimpose the differential voltage signal sampled from the load side onto both ends of the voltage divider circuit, and convert it into a voltage signal within the range that the controller 2 can directly process. The circuit structure is simple and easy to implement.

[0140] As an optional embodiment, the voltage signal processing module further includes:

[0141] The filtering module has its first input terminal connected to the first output terminal of each near-end voltage detection module and each far-end voltage detection module, its second input terminal connected to the second output terminal of each near-end voltage detection module and each far-end voltage detection module, its first output terminal connected to the first terminal of the fifth resistor R5, and its second output terminal connected to the first terminal of the sixth resistor R6 and the first voltage reading terminal of the controller 2.

[0142] It is easy to understand that, in order to improve the accuracy and reliability of the voltage signal received by the final controller 2, a filtering module can be further set at the input of the voltage divider resistor to filter the sampled differential voltage signal before outputting it to the voltage divider circuit. This application does not specifically limit the specific type and implementation method of the filtering module, such as... Figure 5As shown, this can be achieved using capacitor C4. The positive polarity signals Ph1_Sense_DP…Phm_Sense_DP of the voltage differential feedback of each single-phase voltage conversion module Ph are all connected to pin 2 of the filter capacitor C4, and the negative polarity signals Ph1_Sense_DN…Phm_Sense_DN of the voltage differential feedback of each single-phase voltage conversion module Ph are all connected to pin 1 of the filter capacitor C4. After being filtered by capacitor C4, they are connected to the voltage divider compensation network composed of the fifth resistor R5, the sixth resistor R6, and the third capacitor C3, and generate differential signals DP and DN to be fed back to controller 2.

[0143] Specifically, the differential pair signals of all single-phase voltage conversion modules Ph enter through the same side of the filter module. The first side of the pin of capacitor C4 serves as the common input, and the other side of the output serves as the common output. Based on the umbrella topology, setting up a filter module can effectively filter out the noise introduced by all differential signal paths, thereby improving the accuracy and reliability of all voltage feedback signals.

[0144] As an optional embodiment, the voltage signal processing module further includes:

[0145] The zero-point compensation module has its output terminals connected to the output terminals of the voltage signal processing module and the voltage reading terminals of the controller 2, respectively, and is used to provide the zero-point compensation for the controller 2.

[0146] It is understandable that, in order to further improve the stability of the entire control system, a zero-point compensation module can be added to the voltage divider network to introduce a compensation zero point, which works in conjunction with the voltage divider network to realize a voltage divider compensation network. This application does not specifically limit the specific type or implementation method of the compensation zero-point module.

[0147] Specifically, by adding a zero-compensation module to provide a zero-compensation point for the control system, the performance of the entire control system and voltage feedback circuit is effectively improved, steady-state error is eliminated, and the stability of the entire control system is enhanced.

[0148] As an optional embodiment, the zero-point compensation module is a third capacitor C3. The first end of the third capacitor C3 is connected to the first end of the fifth resistor R5, the first output end of each near-end voltage detection module and the first output end of each far-end voltage detection module, respectively. The second end is connected to the second end of the fifth resistor R5, the second end of the sixth resistor R6 and the second voltage reading end of the controller 2, respectively.

[0149] It is easy to understand that zero-point compensation can be achieved by using a third capacitor C3. The third capacitor C3, together with the fifth resistor R5 in the voltage divider network, forms a compensation network to adjust the loop stability. Other compensation network forms can also be used, such as connecting a resistor and a capacitor in series, and then connecting the series circuit in parallel across the fifth resistor R5. This application does not impose any special limitations on the specific type and implementation method of the third capacitor C3.

[0150] This invention provides an umbrella-type network voltage feedback design and its layout and wiring design. The entire voltage feedback network includes a third resistor R3 and a fourth resistor R4 for detecting the far-end voltage, a first resistor R1 and a second resistor R2 for detecting the near-end voltage, a filter module, and a voltage divider compensation network. The differential voltage signals at the far end of each load side are sampled and fed back from the pins of the second capacitor C2 set at the load power supply end by the third resistor R3 and the fourth resistor R4 connected in series at the far end. These signals are then fed back to the filtering and voltage divider network set at the controller 2 end via the pins of the first resistor R1 and the second resistor R2 connected in series at the near end, thus completing the differential voltage feedback at the far end. The differential voltage signals at the near end of each Ph are sampled and fed back from the pins of the first capacitor C1 set at the output end of the single-phase voltage conversion module Ph by the first resistor R1 and the second resistor R2 connected in series at the near end. These signals are then superimposed with the differential voltage signals fed back from the far end and fed back to the filtering and voltage divider network at the controller 2 end, thus completing the differential voltage feedback at the near end. This completes the differential voltage feedback signals Ph1_Sense_DP&DN…Phm_Sense_DP&DN at the far end of each load group and at the output end of each corresponding single-phase voltage conversion module Ph. The overall network topology feeds the differential voltage back to the controller 2 end. All far-end and near-end voltage differential feedback signals are connected to one side of the pin of the filter capacitor C4, and then fed back to the controller 2 through the voltage divider compensation network for pulse width modulation and output voltage sampling power calculation, etc.

[0151] As an optional embodiment, for any near-end voltage detection module, the resistance values ​​of the first resistor R1 and the second resistor R2 are negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module Ph and the controller 2.

[0152] As an optional embodiment, for any remote voltage detection module, the resistance values ​​of the third resistor R3 and the fourth resistor R4 are negatively correlated with the arrangement distance between the corresponding load and the controller 2.

[0153] Understandably, due to the inconsistent power supply lines at the near and far ends, and the dispersed layout of the loads, the connection lines between different single-phase voltage conversion modules Ph and controller 2 are also inconsistent. Therefore, when designing the corresponding voltage detection module, the resistance value needs to be set according to the distance between the measurement point and controller 2. The farther away from controller 2, the smaller the corresponding resistor impedance. Furthermore, to ensure the accuracy of the differential signal, the impedances of the two resistors corresponding to a pair of differential signals should ideally be consistent. Figure 5 As shown, R3 = R4 < R1 = R2, and all impedances are less than or equal to 100Ω. The impedance magnitude is related to the current-carrying impedance and the installation location. The series resistance of the near and far ends of the network corresponding to each single-phase voltage conversion module Ph varies due to differences in location and current-carrying impedance. Taking the controller 2 located at the center of all load distribution layouts as an example, in the distribution layout, the impedance difference of the resistors placed at symmetrical locations about the controller 2 is kept as consistent as possible, so that the series impedances at the far and near ends of Ph at symmetrical locations are equal. Relative to the center of the symmetrical distribution layout, the impedance increases towards both sides. The series impedances at the far and near ends of Ph that are farther from the center are smaller than those at the near end of Ph that are closer to the center, and decrease proportionally according to the current-carrying impedance.

[0154] The impedances of the far-end feedback series resistor and the near-end feedback series resistor are not exactly the same, depending on the layout location and the copper impedance. For example, R3=R4, but R3 may not be equal in different single-phase voltage conversion modules Ph. The further away from the center of symmetry the layout, the smaller the impedance of R3. The same applies to the near-end feedback series resistor. For example, R1=R2, but R1 may not be equal in different single-phase voltage conversion modules Ph. The further away from the center of symmetry the layout, the smaller its impedance. However, at symmetrical locations, the impedance is generally set to be consistent, and the near-end feedback reduction maintains the same or approximately proportional relationship within the same Ph.

[0155] Specifically, by designing a current synthesis and current feedback design anti-interference method, an umbrella network voltage feedback design, and a layout and wiring design, a power supply system suitable for optical module array distribution was realized. This solved the problems of packet loss caused by crosstalk noise, near-far voltage imbalance, and heat dissipation caused by hot spot concentration in the group power supply scheme of multiple independent BUCK optical modules and the centralized power supply scheme of a single BUCK for all optical modules.

[0156] See Figure 8 As shown, Figure 8 This is a flowchart illustrating a control method for a power supply system provided in an embodiment of the present invention. To address the aforementioned technical problems, this embodiment of the present invention also provides a control method for a power supply system, applied to a controller of the aforementioned power supply system. The control method for the power supply system includes:

[0157] S11: Obtain the operating current of each single-phase voltage conversion module through the current detection circuit of the power supply system.

[0158] S12: Control signal output to the corresponding single-phase voltage conversion module based on the operating current adjustment of each single-phase voltage conversion module.

[0159] As one specific embodiment, see Figure 9 As shown, Figure 9 This is a schematic diagram of a controller provided in an embodiment of the present invention. The controller may include: a memory 60 for storing computer programs; and a processor 61 for executing the computer program to implement the steps of the control method for the power supply system described above. The processor 61 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 61 may be implemented using at least one hardware form selected from Digital Signal Processing (DSP), Field-Programmable Gate Array (FPGA), and Programmable Logic Array (PLA). The processor 61 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake-up state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 61 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 61 may also include an Artificial Intelligence (AI) processor for handling computational operations related to machine learning.

[0160] The memory 60 may include one or more computer-readable storage media, which may be non-transitory. The memory 60 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 60 is used to store at least the following computer program 601, which, after being loaded and executed by the processor 61, is capable of implementing the relevant steps of the power supply system control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 60 may also include an operating system 602 and data 603, etc., and the storage method may be temporary storage or permanent storage. The operating system 602 may include Windows, Unix, Linux, etc. The data 603 may include, but is not limited to, data in the power supply system control method. In some embodiments, the controller may also include a display screen 62, an input / output interface 63, a communication interface 64, a power supply 65, and a communication bus 66. Those skilled in the art will understand that... Figure 9 The structure shown does not constitute a limitation on the controller and may include more or fewer components than illustrated.

[0161] For a description of the features in the control method of the power supply system provided in the embodiments of the present invention, please refer to the relevant descriptions of the embodiments of the power supply system described above, which will not be repeated here.

[0162] It is understood that if the power supply system control method in the above embodiments is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the current technology, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods in the various embodiments of the present invention. The aforementioned storage medium includes: USB flash drive, mobile hard drive, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, magnetic disk, or optical disk, and other media capable of storing program code.

[0163] Based on this, embodiments of the present invention also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the control method for the power supply system described above.

[0164] For a description of the features in the computer-readable storage medium provided in the embodiments of the present invention, please refer to the relevant descriptions of the embodiments of the power supply system and its control method described above, which will not be repeated here.

[0165] Based on this, embodiments of the present invention also provide a non-volatile storage medium storing a computer program, which, when executed by a processor, implements the steps of the aforementioned power supply system control method.

[0166] For a description of the features in the non-volatile storage medium provided in the embodiments of the present invention, please refer to the relevant descriptions of the embodiments of the power supply system and its control method described above, which will not be repeated here.

[0167] To address the aforementioned technical problems, embodiments of the present invention also provide a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the aforementioned power supply system control method.

[0168] For a description of the features in the computer program product provided in the embodiments of the present invention, please refer to the relevant descriptions of the embodiments of the power supply system and its control method described above, which will not be repeated here.

[0169] The foregoing has provided a detailed description of a power supply system and its control method, storage medium, and program product provided by embodiments of the present invention. The various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0170] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0171] The power supply system, its control method, storage medium, and program product provided by this invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the protection scope of this invention.

Claims

1. A power supply system, characterized in that, include: The voltage conversion circuit includes several single-phase voltage conversion modules. Each single-phase voltage conversion module corresponds to a set of loads, and its output terminal is connected to the corresponding set of loads. The output terminals of all single-phase voltage conversion modules are interconnected. Each single-phase voltage conversion module is arranged adjacent to its corresponding set of loads. The current detection circuit has its input terminals connected to each single-phase voltage conversion module in the voltage conversion circuit, and is used to detect the operating current of each single-phase voltage conversion module. The voltage detection circuit has its input terminals connected to the output terminals of each single-phase voltage conversion module in the voltage conversion circuit, and its output terminal connected to the voltage reading terminal of the controller. It is used to detect the output voltage of each single-phase voltage conversion module. The controller's input terminal is connected to the output terminal of the current detection circuit, and its output terminal is connected to the control terminal of each single-phase voltage conversion module. It is used to adjust the control signal output to the corresponding single-phase voltage conversion module based on the operating current of each single-phase voltage conversion module; and to adjust the control signal output to the corresponding single-phase voltage conversion module based on the output voltage of each single-phase voltage conversion module, so as to cooperate with the current detection circuit to control the constant voltage output of the single-phase voltage conversion modules and ensure the consistency of the output voltage of each single-phase voltage conversion module. The control signals for each single-phase voltage conversion module are generated by the same signal generator; The voltage detection circuit includes: Several near-end voltage detection modules are connected one-to-one with several single-phase voltage conversion modules; Several remote voltage detection modules are connected one-to-one with several single-phase voltage conversion modules; The near-end voltage detection module includes: a first capacitor, the first side of the two pins of the first capacitor being connected in parallel with the output terminal of the corresponding single-phase voltage conversion module; The first resistor has its first end connected to the second side of the first pin of the first capacitor, and its second end connected to the first voltage reading terminal of the controller. The second resistor has its first end connected to the second side of the second pin of the first capacitor, and its second end connected to the second voltage reading terminal of the controller. The remote voltage detection module includes: a second capacitor, wherein the first side of the two pins of the second capacitor is connected in parallel with the power supply terminal of the corresponding load; The third resistor has its first end connected to the second side of the first pin of the second capacitor, and its second end connected to the first voltage reading terminal of the controller. The fourth resistor has its first end connected to the second side of the second pin of the second capacitor, and its second end connected to the second voltage reading terminal of the controller. The voltage detection circuit further includes: The voltage signal processing module has a first input terminal connected to the first output terminal of each of the near-end voltage detection modules and each of the far-end voltage detection modules, a second input terminal connected to the second output terminal of each of the near-end voltage detection modules and each of the far-end voltage detection modules, and an output terminal connected to the voltage reading terminal of the controller. It is used to superimpose the output voltages of all the single-phase voltage conversion modules and feed them back to the controller. For any near-end voltage detection module, the resistance values ​​of the first resistor and the second resistor are both negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module and the controller; the resistance values ​​of the first resistor and the second resistor are equal. For any remote voltage detection module, the resistance values ​​of the third resistor and the fourth resistor are negatively correlated with the arrangement distance between the corresponding load and the controller; the resistance values ​​of the third resistor and the fourth resistor are equal and less than the resistance value of the first resistor. The voltage signal processing module includes: The fifth resistor has its first end connected to the first output end of each of the near-end voltage detection modules and each of the far-end voltage detection modules, respectively. The sixth resistor has its first end connected to the first voltage reading terminal of the controller, the second output terminal of each of the near-end voltage detection modules, and the second output terminal of each of the far-end voltage detection modules, and its second end connected to the second end of the fifth resistor and the second voltage reading terminal of the controller.

2. The power supply system as described in claim 1, characterized in that, The single-phase voltage conversion module includes: The first switching transistor has its first terminal connected to the positive terminal of the power supply. The second switching transistor has its first terminal serving as the negative output terminal of the single-phase voltage conversion module, connected to the negative terminal of the power supply, and grounded. The inductor has its first end connected to the second end of the first switching transistor and the second switching transistor, respectively. Its second end serves as the positive output terminal of the single-phase voltage conversion module and is connected to the positive output terminals of other single-phase voltage conversion modules besides itself.

3. The power supply system as described in claim 2, characterized in that, The current detection circuit includes: The first current extraction module has a first input terminal connected to the second terminal of the first switching transistor, a second input terminal connected to the second terminal of the second switching transistor and the first terminal of the inductor, and an output terminal connected to the input terminal of the controller, for extracting the first current flowing through the first switching transistor; The second current extraction module has a first input terminal connected to the second terminal of the second switching transistor, a second input terminal connected to the second terminal of the first switching transistor and the first terminal of the inductor, and an output terminal connected to the input terminal of the controller, for extracting the second current flowing through the second switching transistor.

4. The power supply system as described in claim 3, characterized in that, The current detection circuit also includes: The adder has a first input terminal connected to the output terminal of the first current extraction module, a second input terminal connected to the output terminal of the second current extraction module, and an output terminal connected to the input terminal of the controller. It is used to determine the sum of the first current and the second current, and output the sum as the operating current of the single-phase voltage conversion module to the controller.

5. The power supply system as described in claim 3, characterized in that, Both the first current extraction module and the second current extraction module are current mirrors.

6. The power supply system as described in claim 1, characterized in that, The voltage signal processing module further includes: The filtering module has a first input terminal connected to the first output terminal of each of the near-end voltage detection modules and each of the far-end voltage detection modules, a second input terminal connected to the second output terminal of each of the near-end voltage detection modules and each of the far-end voltage detection modules, a first output terminal connected to the first terminal of the fifth resistor, and a second output terminal connected to the first terminal of the sixth resistor and the first voltage reading terminal of the controller.

7. The power supply system as described in claim 1, characterized in that, The voltage signal processing module further includes: The zero-point compensation module has its output terminals connected to the output terminals of the voltage signal processing module and the voltage reading terminals of the controller, respectively, and is used to provide the controller with a zero-point compensation.

8. The power supply system as described in claim 7, characterized in that, The zero-point compensation module is a third capacitor. The first end of the third capacitor is connected to the first end of the fifth resistor, the first output end of each of the near-end voltage detection modules, and the first output end of each of the far-end voltage detection modules. The second end is connected to the second end of the fifth resistor, the second end of the sixth resistor, and the second voltage reading end of the controller.

9. A control method for a power supply system, characterized in that, A controller applied to a power supply system as described in any one of claims 1 to 8, wherein the control method of the power supply system comprises: The operating current of each single-phase voltage conversion module is obtained through the current detection circuit of the power supply system. The control signal output to the corresponding single-phase voltage conversion module is adjusted based on the operating current of each of the single-phase voltage conversion modules.

10. A non-volatile storage medium, characterized in that, The non-volatile storage medium stores a computer program, which, when executed by a processor, implements the steps of the control method for the power supply system as described in claim 9.

11. A computer program product, comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the control method for the power supply system as described in claim 9.

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