Power supply system and control method thereof, storage medium and program product

Abstract

The invention discloses a power supply system and a control method thereof, a storage medium and a program product, and relates to the technical field of power supplies, each single-phase voltage conversion module in a voltage conversion circuit corresponds to a group of loads, and the output ends of all the single-phase voltage conversion modules are mutually connected; each single-phase voltage conversion module works based on the control of the same controller, so that the consistency of the output voltage output to each group of loads is ensured, interference such as crosstalk noise caused by inconsistent power supply of the loads is avoided, and the accurate work of the loads is ensured; meanwhile, when the controller controls each single-phase voltage conversion module to carry out voltage conversion, the working current of each single-phase voltage conversion module can be obtained by utilizing a current detection circuit, and a control signal output to each single-phase voltage conversion module is adjusted by adding a current feedback loop, so that the anti-interference capability of the current signal is stronger; therefore, the anti-interference capability and stability of the power supply system are improved, and normal power supply of the power supply system is ensured.

Description

Technical Field

[0001] The present invention relates to the field of power supply technology, and in particular to a power supply system and a control method thereof, a storage medium, and a program product. Background Art

[0002] With the dramatic increase in network data volume and business volume, high-throughput switches for heavy-duty business data exchange are widely used in various large data centers, and 64-port 400G optical switches are widely used. The power of a single optical module in this optical switch is nearly 15W, so the power consumption required for the entire 64-port optical switch is nearly kilowatts, and the working current is nearly 300A. Therefore, how to realize the power supply of the optical switch is a very severe challenge. There are mainly two ways to realize the power supply of the optical switch in the prior art. The first way is to use multiple discrete power supply units to power each optical module therein, but because each power supply unit is independent of each other, it is difficult to keep the power supply of each optical module consistent, resulting in crosstalk noise in the power supply circuit of the optical module, resulting in data packet loss of the optical module, etc., affecting the communication efficiency of the optical module; the second way is to use a power supply unit to power all optical modules, but in this case, the distance between each optical module and the power supply unit is different, resulting in the difficulty of the voltage feedback design of the power supply unit. The voltage difference caused by the different line distances will also affect the power supply voltage regulation accuracy of the power supply unit, causing data packet loss and other situations.

[0003] It can be seen that how to provide an accurate and reliable power supply solution for an optical switch is a problem that needs to be solved by those skilled in the art. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a power supply system and a control method thereof, a storage medium, and a program product, which can solve the power supply problem of an optical switch.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a power supply system, including: The voltage conversion circuit includes a plurality of single-phase voltage conversion modules, one single-phase voltage conversion module corresponds to a group of loads, and its output end is connected to the corresponding group of loads; the output ends of all single-phase voltage conversion modules are connected to each other; A current detection circuit, the input end of which is respectively connected to each single-phase voltage conversion module in the voltage conversion circuit, and is used to detect the working current of each single-phase voltage conversion module; The controller has an input end connected to the output end of the current detection circuit, and an output end connected to the control end of each single-phase voltage conversion module, and is used to adjust the control signal output to the corresponding single-phase voltage conversion module based on the working current of each single-phase voltage conversion module.

[0006] Optionally, the single-phase voltage conversion module includes: A first switch tube, a first end of which is connected to the positive electrode of the power supply; A second switch tube, a first end of which serves as a negative output end of the single-phase voltage conversion module, is connected to the negative electrode of the power supply and is grounded; The inductor has a first end connected to the second end of the first switch tube and the second end of the second switch tube respectively, and a second end serving as the positive output end of the single-phase voltage conversion module and connected to the positive output ends of other single-phase voltage conversion modules except itself.

[0007] Optionally, the current detection circuit includes: A first current extraction module, wherein the first input end is connected to the second end of the first switch tube, the second input end is respectively connected to the second end of the second switch tube and the first end of the inductor, and the output end is connected to the input end of the controller, and is used to extract a first current flowing through the first switch tube; A second current extraction module has a first input end connected to the second end of the second switch tube, a second input end connected to the second end of the first switch tube and the first end of the inductor respectively, and an output end connected to the input end of the controller, for extracting a second current flowing through the second switch tube.

[0008] Optionally, the current detection circuit further includes: An adder, wherein the first input end is connected to the output end of the first current extraction module, the second input end is connected to the output end of the second current extraction module, and the output end is connected to the input end of the controller, and is used to determine the sum of the first current and the second current, and output the sum as the working current of the single-phase voltage conversion module to the controller.

[0009] Optionally, the first current extraction module and the second current extraction module are both current mirrors.

[0010] Optionally, each single-phase voltage conversion module is arranged adjacent to a corresponding group of loads.

[0011] Optionally, also include: A voltage detection circuit, the input end of which is respectively connected to the output end of each single-phase voltage conversion module in the voltage conversion circuit, and the output end is connected to the voltage reading end of the controller, for detecting the output voltage of each single-phase voltage conversion module; 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.

[0012] Optionally, the voltage detection circuit includes: A plurality of proximal voltage detection modules connected to the plurality of single-phase voltage conversion modules in a one-to-one correspondence, wherein the first input end is connected to the positive output end of the corresponding single-phase voltage conversion module, the second input end is connected to the negative output end of the corresponding single-phase voltage conversion module, the first output end is connected to the first voltage reading end of the controller, and the second output end is connected to the second voltage reading end of the controller; A plurality of remote voltage detection modules are connected one-to-one with a plurality of single-phase voltage conversion modules, wherein 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.

[0013] Optionally, the proximal voltage detection module includes: A first capacitor, wherein a first side of two end pins of the first capacitor is connected in parallel with an output end of a corresponding single-phase voltage conversion module; a first resistor, a first end of which is connected to the second side of the first pin of the first capacitor, and a second end of which is connected to the first voltage reading terminal of the controller; The second resistor has a first end connected to the second side of the second pin of the first capacitor, and a second end connected to the second voltage reading end of the controller.

[0014] Optional remote voltage detection module includes: A second capacitor, wherein a first side of two end pins of the second capacitor is connected in parallel with a power supply end of a corresponding load; a third resistor, a first end of which is connected to the second side of the first pin of the second capacitor, and a second end of which is connected to the first voltage reading terminal of the controller; A fourth resistor has a first end connected to the second side of the second pin of the second capacitor, and a second end connected to the second voltage reading end of the controller.

[0015] Optionally, the voltage detection circuit further includes: A voltage signal processing module, wherein the first input end is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module, the second input end is respectively connected to the second output end of each proximal voltage detection module and each distal voltage detection module, and the output end is connected to the voltage reading end of the controller, and is used to superimpose the output voltages of all single-phase voltage conversion modules and feed them back to the controller.

[0016] Optionally, the voltage signal processing module includes: a fifth resistor, a first end of which is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module; The sixth resistor has a first end respectively connected to the first voltage reading end of the controller, the second output end of each proximal voltage detection module and the second output end of each distal voltage detection module, and a second end respectively connected to the second end of the fifth resistor and the second voltage reading end of the controller.

[0017] Optionally, the voltage signal processing module further includes: A filtering module, wherein the first input end is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module, the second input end is respectively connected to the second output end of each proximal voltage detection module and each distal voltage detection module, the first output end is connected to the first end of the fifth resistor, and the second output end is respectively connected to the first end of the sixth resistor and the first voltage reading end of the controller.

[0018] Optionally, the voltage signal processing module further includes: The compensation zero point module has an output end connected to the output end of the voltage signal processing module and the voltage reading end of the controller respectively, and is used to provide a compensation zero point for the controller.

[0019] Optionally, the compensation zero point module is a third capacitor, the first end of the third capacitor is respectively connected to the first end of the fifth resistor, the first output end of each proximal voltage detection module and the first output end of each remote voltage detection module, and the second end is respectively 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.

[0020] Optionally, for any proximal voltage detection module, the resistance value of the first resistor and the resistance value of the second resistor are negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module and the controller.

[0021] Optionally, for any remote voltage detection module, the resistance value of the third resistor and the resistance value of the fourth resistor are both negatively correlated with the arrangement distance between the corresponding load and the controller.

[0022] To solve the above technical problems, an embodiment of the present invention further provides a control method for a power supply system, which is applied to a controller of the power supply system as described above. The control method for the power supply system includes: The working 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 single-phase voltage conversion module.

[0023] To solve the above technical problems, an embodiment of the present invention further provides a non-volatile storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the power supply system as described above are implemented.

[0024] To solve the above technical problem, an embodiment of the present invention further provides a computer program product, including a computer program / instruction, which implements the steps of the aforementioned power supply system control method when executed by a processor.

[0025] It can be seen from the above technical solution that each single-phase voltage conversion module in the voltage conversion circuit corresponds to a group of loads, the output ends of all single-phase voltage conversion modules are connected to each other, and each single-phase voltage conversion module works based on 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 working current of each single-phase voltage conversion module. The beneficial effect of the present invention is to ensure the consistency of the output voltage output to each group of loads through the connection topology of the single-phase voltage conversion module, thereby avoiding interference such as crosstalk noise caused by inconsistent load power supply, and ensuring the accurate operation of the load; at the same time, by increasing the design of the current feedback loop to adjust the control signal output to each single-phase voltage conversion module, the current signal has a stronger anti-interference ability, thereby improving the anti-interference ability and stability of the power supply system, and ensuring the normal power supply of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a power supply system provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of another power supply system provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a single-phase voltage conversion module provided by an embodiment of the present invention; Figure 4 A schematic diagram of the waveform change of the working current of a single-phase voltage conversion module provided in an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a voltage detection circuit provided by an embodiment of the present invention; Figure 6 A wiring diagram of a voltage detection circuit provided by an embodiment of the present invention; Figure 7 A schematic diagram of a device routing method of a voltage detection circuit provided by an embodiment of the present invention; Figure 8 A schematic diagram of a flow chart of a control method for a power supply system provided by an embodiment of the present invention; Fig. 9 A schematic diagram of the structure of a controller provided by an embodiment of the present invention. DETAILED DESCRIPTION

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

[0029] The terms "including" and "having" in the specification of the present invention and the above-mentioned drawings, as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0030] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Next, a power supply system provided by an embodiment of the present invention is described in detail. Figure 1 As shown, Figure 1 A schematic diagram of a power supply system according to an embodiment of the present invention is provided, wherein the power supply system comprises:

[0032] The voltage conversion circuit includes a plurality of single-phase voltage conversion modules Ph, one single-phase voltage conversion module Ph corresponds to a group of loads, and its output end is connected to the corresponding group of loads; the output ends of all single-phase voltage conversion modules Ph are connected to each other.

[0033] The current detection circuit 1 has input ends respectively connected to the single-phase voltage conversion modules Ph in the voltage conversion circuit, and is used to detect the working current of each single-phase voltage conversion module Ph.

[0034] The controller 2 has an input end connected to the output end of the current detection circuit 1, and an output end connected to the control end of each single-phase voltage conversion module Ph, and is used to adjust the control signal output to the corresponding single-phase voltage conversion module Ph based on the working current of each single-phase voltage conversion module Ph.

[0035] It is understandable that in order to avoid problems such as crosstalk noise caused by inconsistent power supply voltages output to each group of loads, a voltage conversion circuit is used in the present invention to power all loads. At the same time, in order to avoid problems such as power concentration, high heat dissipation difficulty, and difficulty in concentrated layout of board area, the voltage conversion circuit is implemented by multiple single-phase voltage conversion modules Ph connected in parallel, and all loads are divided into corresponding groups of loads. The output end of each single-phase voltage conversion module Ph is connected one-to-one with a corresponding group of loads. When the voltage conversion circuit is powered, the output voltage of each single-phase voltage conversion module Ph is mainly used to power a corresponding group of loads. When designing the mainboard layout, each single-phase voltage conversion module Ph will be set close to its corresponding group of loads. Therefore, each single-phase voltage conversion module Ph in the entire voltage conversion circuit will be laid out with the load group as the reference, and the layout will be dispersed, thereby avoiding power concentration, reducing heat dissipation difficulty, and facilitating layout design. At the same time, the output ends of each single-phase voltage conversion module Ph are connected together to ensure the consistency of the output voltage of each single-phase voltage conversion module Ph. Starting from the layout design and circuit topology design, the consistency of the output voltage of each single-phase voltage conversion module Ph is ensured in many aspects, so as to avoid the influence of interference signals such as crosstalk noise on the normal communication and data transmission of the load.

[0036] It should be noted that there is only one controller 2 in the voltage conversion circuit to realize the working control of multiple single-phase voltage conversion modules Ph. The control signals of each single-phase voltage conversion module Ph are generated by the same signal generator, so as to ensure the consistency of the output voltage of each single-phase voltage conversion module Ph from the perspective of the control signal, avoid the power supply difference caused by factors such as control signal asynchrony, and each single-phase voltage conversion module Ph will be designed close to a corresponding group of loads during layout. At this time, the distance between the controller 2 and the single-phase voltage conversion module Ph is far. At this time, if the controller 2 is still based only on voltage feedback control, the voltage drop caused by the longer 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 be unable to work properly. Therefore, in this case, it is necessary to establish a current feedback control loop of controller 2, and detect the working current of each single-phase voltage conversion module Ph by designing a current detection circuit 1, and feed back the detected working current to controller 2. Controller 2 controls each single-phase voltage conversion module Ph according to the feedback signals of the current feedback loop and the voltage feedback loop, and realizes the constant voltage output of multiple single-phase voltage conversion modules Ph. The rapid response and anti-interference ability of the current can ensure the normal operation of the entire control system and improve the anti-interference ability and stability of the control system. Through the setting of the current feedback network, multiple single-phase voltage conversion modules Ph in the centralized power supply voltage conversion circuit can be flexibly arranged, especially close to a corresponding set of loads, to achieve a stable and reliable power supply system.

[0037] It is not difficult to understand that the specific types and implementation methods of the voltage conversion circuit, the single-phase voltage conversion module Ph, the current detection circuit 1 and the controller 2 are not particularly limited in this application. The preferred embodiment of the design of each single-phase voltage conversion module Ph in the voltage conversion circuit is to use a circuit with completely consistent circuit topology, or different circuit topologies can be used. The voltage conversion circuit can be a boost circuit or a buck circuit, etc., and is specifically designed according to the power supply requirements of the load. The control method of the controller 2 for the single-phase voltage conversion module Ph is not particularly limited in this application, and the control of the single-phase voltage conversion module Ph can be realized by using square wave signals, pulse width modulation signals, etc. The controller 2 can be designed with DSP (Digital Signal Processor), MCU (Microcontroller Unit), mis-phase controller dedicated IC (Integrated Circuit) and other devices as the core to control the power supply to complete its power supply function.

[0038] It can be understood that the present invention provides a power supply system and design method that can be applied in the optical module array distribution scenario, and provides each single-phase voltage conversion module Ph in the voltage conversion circuit of the power supply to be adaptively distributed according to the distribution of the load, and maintain a common output, thereby reducing the packet loss problem that exists when each group of loads, that is, each optical module communicates with the same MAC or PHY due to power supply differences; the hot spots are not concentrated in the distributed layout, reducing the difficulty of thermal design of the entire circuit. At the same time, by collecting the working current of each single-phase voltage conversion module Ph, the closed-loop control of the current is realized, the anti-interference performance of the entire control system is enhanced, the stability and reliability of the power supply system are effectively improved, and the decentralized layout and wiring of each Ph (phase) is realized.

[0039] It should be noted that the present invention mainly takes into account the characteristics of the optical modules in the optical switch that the power consumption ends are regularly dispersed in columns. For example, n optical modules are arranged in horizontal rows in a 19-inch wide motherboard. This characteristic leads to noise packet loss and heat dissipation problems in the power supply of the entire system. Therefore, a power supply system design method for the distribution of optical module arrays in optical switches is provided. This power supply system can be extended to the power supply design of column-shaped loads or load power supply input points that are discrete and far apart, and applied to the power supply design of loads with power consumption characteristics similar to those of optical modules in optical switches. At the same time, when grouping loads, they can also be grouped according to the distribution layout of the loads, and one or more loads in adjacent positions can be grouped together. The specific grouping method of the loads is not particularly limited in this application.

[0040] It is not difficult to understand that the controller 2 not only needs to output control signals to each single-phase voltage conversion module Ph, but also needs to obtain feedback signals such as the working current of each single-phase voltage conversion module Ph. Therefore, the controller 2 and each single-phase voltage conversion module Ph can directly use a communication port to simultaneously realize data input and output by establishing a two-way communication connection. When the controller 2 controls each single-phase voltage conversion module Ph, it can perform in-phase control and staggered phase control of each single-phase voltage conversion module Ph according to actual application requirements. The switch tubes of each phase work alternately at different phases. Through reasonable phase arrangement, the inductor currents of each phase are interlaced in time to jointly provide a stable current for the load. For example, in-phase control can be achieved by controlling the first switch tubes Q1 of all single-phase voltage conversion modules Ph to work synchronously.

[0041] As a specific embodiment, see Figure 2 As shown, Figure 2 A structural schematic diagram of another power supply system provided for an embodiment of the present invention; a power supply system and design method for a distributed optical module array is implemented, the power supply system includes a controller and a signal, a Phm power level as a single-phase voltage conversion module, and n optical modules as loads. Wherein m and n are natural numbers greater than 1, and a preferred embodiment is that n is an integer multiple of m to ensure the consistency of each group of loads and facilitate the power supply balance of each single-phase voltage conversion module, such as n=m, n=2m, n=4m, etc. This embodiment is described by taking n=2m as an example.

[0042] The controller 2 and each single-phase voltage conversion module Ph directly transmit data through the communication signal Ph1_S1…Phm_Sm. The signal Phm_Sm includes but is not limited to the pulse width modulation control signal, enable signal, temperature signal, current feedback signal, etc. used to control the operation of the single-phase voltage conversion module Ph. The current feedback signal not only provides the controller 2 with the current state information of each single-phase voltage conversion module Ph, but also participates in the pulse width modulation, so that the entire distributed power supply system has extremely strong anti-interference and stability; the controller 2 simultaneously obtains the voltage feedback differential signal Phm_Vsense of each single-phase voltage conversion module Ph. The voltage feedback differential signal Phm_Vsense includes the far-end feedback differential signal and the near-end feedback differential signal of each single-phase voltage conversion module Ph. The voltage feedback signal of each single-phase voltage conversion module Ph is fed back to the controller 2, forming an umbrella-shaped signal feedback structure as a whole. The series resistance matching impedance in the feedback structure is adjusted according to the impedance relationship, which can further meet the voltage stabilization accuracy requirements of the power supply system. A specific embodiment is that the Phm power level can use a single-phase buck (step-down) power supply to convert the main power circuit, the number of which is in a corresponding proportional relationship with the number of optical modules, and is evenly distributed near the corresponding dispersed optical modules in terms of layout.

[0043] The present invention proposes a power supply system and design method suitable for array distributed loads, and proposes a current synthesis and current feedback anti-interference design and method. Reliable power supply to distributed loads is achieved through a voltage conversion circuit including multiple single-phase voltage conversion modules. The multiple single-phase voltage conversion modules are arranged in a dispersed manner, thereby dispersing the heat source and solving the heat dissipation problem; the multiple single-phase voltage conversion modules realize common output, avoiding problems such as crosstalk noise caused by inconsistent power supply received by each group of loads, and improving the anti-interference and stability of the power supply system by designing a current feedback loop to ensure the normal operation of the entire control system.

[0044] See also Figure 3 As shown, Figure 3 A schematic diagram of the structure 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: A first switch tube Q1, a first end of which is connected to the positive electrode of the power supply; The second switch tube Q2 has a first end serving as a negative output end of the single-phase voltage conversion module Ph, connected to the negative electrode of the power supply, and grounded; The inductor L0 has a first end connected to the second end of the first switch tube Q1 and the second end of the second switch tube Q2 respectively, and a second end serving as the positive output end of the single-phase voltage conversion module Ph and connected to the positive output ends of other single-phase voltage conversion modules Ph except itself.

[0045] It is not difficult to understand that the single-phase voltage conversion module Ph can be implemented specifically using a buck circuit, in which the power stage is composed of the core components of the first switch tube Q1 and the second switch tube Q2. The controller 2 realizes power supply by controlling the on or off of the first switch tube Q1 and the second switch tube Q2. In the on stage, the first switch tube Q1 connects the input power supply to the inductor L0 to store energy in the inductor L0; in the off stage, the second switch tube Q2 is turned on to provide a freewheeling channel for the inductor current, so that the energy in the inductor L0 is released to the load. Figure 3 As shown, a capacitor C0 can be set in parallel between the two input ends of the buck circuit and a capacitor C1 can be set in parallel between the two output ends of the buck circuit for filtering, thereby improving the accuracy and reliability of the buck circuit power supply and realizing the Phm power level composed of the power level and the input and output filter circuit. 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.

[0046] It should be noted that the present application does not specifically limit the specific types and implementations of the power supply, the first switch tube Q1, the second switch tube Q2, and the inductor L0. Figure 3As shown, a MOS tube can be used for implementation, and the output voltage of the power supply can be selected and set according to the actual power supply demand of the load and the specific design of the buck circuit. Furthermore, the second switch tube Q2 can be implemented by a diode, which can prevent current backflow while realizing power supply, and further protect the single-phase voltage conversion module Ph. A diode can also be connected in series at the second end of the inductor L0 to prevent current backflow. Each single-phase voltage conversion module Ph in the voltage conversion circuit can be implemented in the manner provided in this embodiment, or other implementation methods can be selected, and this application does not make any special restrictions here. The specific control method of the controller 2 for the first switch tube Q1 and the second switch tube Q2 is not particularly limited in this application, and can be implemented in a manner such as a pulse width modulation signal.

[0047] Specifically, the single-phase voltage conversion module Ph can be implemented using a buck circuit consisting of a first switch tube Q1, a second switch tube Q2 and an inductor L0. The entire circuit structure is simple and easy to implement, which is conducive to the simple implementation of the entire voltage conversion circuit. It can convert the power supply into a lower stable output voltage, and achieve voltage outputs of different sizes by adjusting the duty cycle of the two switch tubes to meet different load power supply requirements.

[0048] See also Figure 4 As shown, Figure 4 A schematic diagram of waveform changes of a working 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: A first current extraction module, wherein the first input end is connected to the second end of the first switch tube Q1, the second input end is respectively connected to the second end of the second switch tube Q2 and the first end of the inductor L0, and the output end is connected to the input end of the controller 2, and is used to extract the first current flowing through the first switch tube Q1; The second current extraction module has a first input end connected to the second end of the second switch tube Q2, a second input end connected to the second end of the first switch tube Q1 and the first end of the inductor L0 respectively, and an output end connected to the input end of the controller 2, and is used to extract the second current flowing through the second switch tube Q2.

[0049] It can be understood that in order to facilitate the controller 2 to obtain the working 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 action of the first switch tube Q1 and the second switch tube Q2 to realize power supply, for any single-phase voltage conversion module Ph, a first current extraction module and a second current extraction module are set to respectively obtain the current flowing through the first switch tube Q1 and the current flowing through the second switch tube Q2 in the single-phase voltage conversion module Ph. Therefore, it is necessary to set a number of first current extraction modules corresponding to a number of single-phase voltage conversion modules Ph and a number of second current extraction modules corresponding to a number of single-phase voltage conversion modules Ph. The controller 2 determines the working current of each single-phase voltage conversion module Ph through each corresponding first current extraction module and second current extraction module. The specific type and implementation method of the first current extraction module and the second current extraction module are not particularly limited in this application. The corresponding mirror current can be generated by a current mirror or the like to realize current extraction.

[0050] Specifically, each single-phase voltage conversion module Ph has a corresponding current feedback signal. The controller 2 uses the working current corresponding to each single-phase voltage conversion module Ph to participate in the control signal adjustment of the single-phase voltage conversion module Ph, so that the power supply system has good stability and reliability, and provides a design basis for the distributed layout of each single-phase voltage conversion module Ph, so as to disperse hot spots and reduce the difficulty of thermal design.

[0051] As an optional embodiment, the current detection circuit 1 further includes: An adder, wherein the first input end is connected to the output end of the first current extraction module, the second input end is connected to the output end of the second current extraction module, and the output end is connected to the input end of the controller 2, and is used to determine the sum of the first current and the second current, and output the sum as the working current of the single-phase voltage conversion module Ph to the controller 2.

[0052] It is not difficult to understand that for the single-phase voltage conversion module Ph implemented by the buck circuit, its working current should actually be the inductor current that finally flows through the inductor L0. Therefore, after obtaining the first current and the second current, an adder is further required to synthesize the two currents. The synthesized current is directly output to the controller 2 as the working current of the single-phase voltage conversion module Ph, so that the controller 2 can be controlled directly according to the synthesized current. The specific type and implementation method of the adder are not particularly limited in this application.

[0053] As a specific embodiment, Figure 3 As shown, I up is the mirror current source of the first switch tube Q1, and the mirror ratio is f, Idown I is the mirror current source of the second switch tube Q2, and the mirror ratio is also f, f>0. up and I down After compensation, I is synthesized by the adder L I up is the proportional current generated by the mirror current source in the connection loop of the first switch tube Q1, I down The proportional current generated by the mirror current source in the connection loop of the second switch tube Q2 is consistent with the proportional current source of the first switch tube Q1 and the second switch tube Q2. The proportional current source is synthesized into a new current source through an adder. L is the output current of the current source, I L That is, the current feedback signal of each single-phase voltage conversion module Ph of the power supply system in this embodiment is fed back to the controller 2 to participate in pulse width adjustment, so as to ensure that the power supply system of each single-phase voltage conversion module Ph is stable and reliable. 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 t1-t2, I up From I1 to I3; during t2-t3, I down From I3 down to I1, t1-t3 synthesizes a cycle of I L Waveform; I up and I down Two mirror current sources of the same ratio are superimposed through an adder to form a new current source I L The synthesized waveform is as follows Figure 4 The current waveform I L It can be used to feed back the actual working current waveform of each single-phase voltage conversion module Ph.

[0054] It should be noted that the current source signal I L Feedback to controller 2, on the one hand, is used to calculate the output current of each single-phase voltage conversion module Ph, so as to summarize the output current of the power supply system as a whole, that is, the final load current, that is, the total power supply current of the load optical module, and then further combined with the voltage feedback signal to realize power monitoring of the entire power supply system; on the other hand, it is used to participate in the pulse width adjustment of the PID algorithm inside controller 2, and quickly adjust the pulse width of the control signal corresponding to the single-phase voltage conversion module Ph with a phase advance of 90°. The advanced fast response of the current signal and the strong anti-interference of the current source signal make the distributed power supply system still have good system stability and power supply reliability even if it is discretely laid out. By using a synthetic current source to participate in the closed-loop control to enhance the anti-interference of the control system, each single-phase voltage conversion module Ph has a synthetic current feedback signal IL , not only feeds back the current state 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 whole machine power consumption detection of the controller 2.

[0055] As an optional embodiment, the first current extraction module and the second current extraction module are both current mirrors.

[0056] It is understandable that the first current extraction module and the second current extraction module can specifically implement the current extraction process by means of a current mirror. The current acquisition method by means of a current mirror has a relatively high accuracy and can fully reflect the actual working current of each single-phase voltage conversion module Ph. The specific structure and implementation method of the current mirror are not particularly limited in this application.

[0057] Specifically, the working current of each single-phase voltage conversion module Ph is superimposed by the mirror current sources of two switching tubes through an adder. The synthesized current source current waveform is similar to the output inductor L0 waveform of the single-phase voltage conversion module Ph. After compensation for the voltage signal and temperature signal, the current waveform is closer to the actual current waveform of power conversion, which makes the current signal involved in pulse adjustment more accurate and ensures the high stability and reliability of the power supply system.

[0058] As an optional embodiment, each single-phase voltage conversion module Ph is arranged adjacent to a corresponding group of loads.

[0059] It is not difficult to understand that in order to further avoid the influence of the voltage drop when the power supply line is too long on the power supply accuracy and reliability of the single-phase voltage conversion module Ph, the actual layout of the load will be considered when designing the layout of the power supply system, and each single-phase voltage conversion module Ph will be set adjacent to a corresponding group of loads. Generally, the load and the power supply system will be set on the main board of the equipment. The adjacent setting means that the distance between the setting position of the single-phase voltage conversion module Ph and the corresponding group of loads on the main board is small, so as to shorten the distance of the power supply line from the single-phase voltage conversion module Ph to the corresponding group of loads as much as possible, and reduce the influence of the line voltage difference on the power supply.

[0060] Specifically, on the basis of setting up current feedback control, during the layout design, each single-phase voltage conversion module Ph and a corresponding group of loads can be set adjacent to each other to minimize the impact of line voltage difference on power supply imbalance and other aspects, thereby improving the power supply voltage regulation accuracy of each single-phase voltage conversion module Ph, and also facilitating each single-phase voltage conversion module Ph to realize the main power supply of a corresponding group of loads.

[0061] See also Figure 5 As shown, Figure 5A schematic diagram of a voltage detection circuit according to an embodiment of the present invention; see Figure 6 As shown, Figure 6 A wiring diagram of a voltage detection circuit provided by an embodiment of the present invention; as an optional embodiment, it also includes: A voltage detection circuit, the input end of which is respectively connected to the output end of each single-phase voltage conversion module Ph in the voltage conversion circuit, and the output end is connected to the voltage reading end of the controller 2, for detecting the output voltage of each single-phase voltage conversion module Ph; The controller 2 is further 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.

[0062] It is understandable that the controller 2 will not only use the current feedback signal to adjust the control signal of the single-phase voltage conversion module Ph, but also needs to obtain the voltage feedback signal of each single-phase voltage conversion module Ph to adjust the control signal of the single-phase voltage conversion module Ph. Therefore, a corresponding voltage detection circuit can also be set in the power supply system to detect the output voltage of each single-phase voltage conversion module Ph, and the controller 2 not only receives the current feedback signal of the single-phase voltage conversion module Ph, but also receives the corresponding voltage feedback signal. The specific type and implementation method of the voltage detection circuit are not particularly limited in this application.

[0063] Furthermore, after obtaining the current feedback signal and voltage feedback signal of each single-phase voltage conversion module Ph, the controller 2 can further obtain the output power corresponding to each single-phase voltage conversion module Ph, thereby performing power management and power monitoring of each single-phase voltage conversion module Ph and the entire voltage conversion circuit. For example, in general, each optical module requires a fixed and consistent power supply voltage. The controller 2 can combine the voltage feedback signal and the current feedback signal to control and realize the constant voltage output of each single-phase voltage conversion module Ph. When the controller 2 obtains the voltage feedback signal, it compares the feedback voltage signal with the set target voltage value, and makes a difference to obtain a voltage error signal. When the feedback voltage signal differs greatly from the target voltage, the duty cycle of the pulse width modulation signal output to the corresponding single-phase voltage conversion module Ph is adjusted, 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 ability, the controller 2 also needs to determine the load change information according to the current feedback signal, which helps to control the output voltage more accurately. Specifically, PID control and other methods can be used to realize the control of each single-phase voltage conversion module Ph.

[0064] 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 working status of the circuit and has a stronger adaptability to various interferences and load changes, thereby improving the stability of the entire power supply system and being able to adjust the output more accurately to meet the requirements of different loads for constant voltage output accuracy.

[0065] As an optional embodiment, the voltage detection circuit includes: A plurality of proximal voltage detection modules connected one-to-one with a plurality of single-phase voltage conversion modules Ph, wherein a first input terminal is connected to a positive output terminal of a corresponding single-phase voltage conversion module Ph, a second input terminal is connected to a negative output terminal of a corresponding single-phase voltage conversion module Ph, a first output terminal is connected to a first voltage reading terminal of a controller 2, and a second output terminal is connected to a second voltage reading terminal of the controller 2; A plurality of remote voltage detection modules are connected one-to-one with a plurality of single-phase voltage conversion modules Ph, the first input end is connected to the positive power supply end of the corresponding load, the second input end is connected to the negative power supply end of the corresponding load, the first output end is connected to the first voltage reading end of the controller 2, and the second output end is connected to the second voltage reading end of the controller 2.

[0066] Considering that when the actual single-phase voltage conversion module Ph supplies power to each group of loads, there is still a power supply line at a certain distance between the single-phase voltage conversion module Ph and the corresponding load, 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 specifically sets a proximal voltage detection module for detecting the output end of the single-phase voltage conversion module Ph and a distal voltage detection module for detecting the voltage received by the load power supply end. For each single-phase voltage conversion module Ph, the controller 2 actually receives the result of the superposition of two groups 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 ends of the controller 2, forming a voltage feedback design of an umbrella network, that is, an umbrella topology with the voltage reading end of the controller 2 as the end point and the distal detection point and proximal detection point of each single-phase voltage conversion module Ph as the starting point. The design of an umbrella-shaped voltage differential feedback network is used to improve the packet loss problem caused by the imbalance of power supply voltage caused by the large difference between the near and far ends of the optical module loads arranged in a row, ensuring that each group of loads can receive an accurate and effective power supply voltage. The specific types and implementation methods of the near-end voltage detection module and the far-end voltage detection module are not particularly limited in this application.

[0067] Specifically, the present invention proposes a current-type multi-phase power supply design scheme, and combines an umbrella network feedback method to realize reliable power supply to the load by a multi-phase single-circuit power supply distributed power supply system, and proposes an umbrella network voltage feedback design and layout and wiring design method to solve the power supply imbalance problem that may exist in each optical module, that is, each group of loads, to ensure that each group of loads can receive an accurate and effective power supply voltage, which not only solves the packet loss and efficiency reduction problem caused by the power supply problem of the optical switch, but also can realize the distributed layout of each single-phase voltage conversion module Ph, while reducing the power supply imbalance problem caused by the dispersion of the optical module array, that is, the inconsistency of the power supply lines when the layout of each group of loads is dispersed, and at the same time disperses and balances the power loss, and solves the problem of difficult centralized heat dissipation.

[0068] See also Figure 7 As shown, Figure 7 A schematic diagram of a device routing method of a voltage detection circuit provided in an embodiment of the present invention. As an optional embodiment, the proximal voltage detection module includes: A first capacitor C1, a first side of two end pins of the first capacitor C1 is connected in parallel with an output end of a corresponding single-phase voltage conversion module Ph; A first resistor R1, a first end of which is connected to the second side of the first pin of the first capacitor C1, and a second end of which is connected to the first voltage reading end of the controller 2; The second resistor R2 has a first end connected to the second side of the second pin of the first capacitor C1 , and a second end connected to the second voltage reading end of the controller 2 .

[0069] It is not difficult to understand that the proximal voltage detection module can be implemented specifically by series resistor feedback, and a group of differential voltage signals corresponding to the output end 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 end of the single-phase voltage conversion module Ph, and the second resistor R2 is connected in series with the negative output end of the single-phase voltage conversion module Ph. At the same time, in order to achieve more accurate voltage detection, a first capacitor C1 is also set in parallel between the two output ends of the single-phase voltage conversion module Ph, and the filtering of the first capacitor C1 is used to improve the accuracy and reliability of the voltage signal finally detected. The specific types and implementation methods of the first capacitor C1, the first resistor R1 and the second resistor R2 are not particularly limited in this application. Generally, when the single-phase voltage conversion module Ph is implemented by a buck circuit, its output end itself will be connected in parallel with a capacitor. At this time, the first capacitor C1 can be directly reused by the capacitor set in parallel at the output end of the buck circuit itself.

[0070] Specifically, the feedback voltage is detected and sampled through a series resistor, and 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 proximal voltage is detected by collecting the differential signal between the two output terminals, which can effectively reduce the impact of interference on the detection result and is not easily affected by external electromagnetic fields and other factors, thereby ensuring the accuracy of voltage feedback signal detection.

[0071] As an optional embodiment, the remote voltage detection module includes: A second capacitor C2, wherein a first side of two end pins of the second capacitor C2 is connected in parallel to a power supply end of a corresponding load; A third resistor R3, a first end of which is connected to the second side of the first pin of the second capacitor C2, and a second end of which is connected to the first voltage reading end of the controller 2; The fourth resistor R4 has a first end connected to the second side of the second pin of the second capacitor C2 , and a second end connected to the second voltage reading end of the controller 2 .

[0072] It is not difficult to understand that the remote voltage detection module can be implemented specifically by series resistor feedback, and a set of differential voltage signals actually received by the load power supply end corresponding to the single-phase voltage conversion module Ph is detected by setting the third resistor R3 and the fourth resistor R4. The third resistor R3 is connected in series with the positive power supply end of the load, and the second resistor R2 is connected in series with the negative power supply end of the load. At the same time, in order to achieve more accurate voltage detection, a second capacitor C2 is also set in parallel between the two power supply ends of the load, and the filtering of the second capacitor C2 is used to improve the accuracy and reliability of the voltage signal finally detected. The specific types and implementation methods of the second capacitor C2, the third resistor R3 and the fourth resistor R4 are not particularly limited in this application.

[0073] Specifically, the feedback voltage is detected and sampled through a series resistor, and 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 collecting the differential signal between the two power supply ends, which can effectively reduce the impact of interference on the detection result and is not easily affected by external electromagnetic fields and other factors, thereby ensuring the accuracy of voltage feedback signal detection.

[0074] As a specific embodiment, Figure 5 and Figure 6 As shown, both the proximal voltage detection module and the distal voltage detection module use a series resistor feedback method to implement voltage detection.

[0075] Pin 1 of the third resistor R3 is connected to pin 1 of the second capacitor C2 set at the power supply end of the load optical module, and pin 2 of the remote feedback series third resistor R3 is connected to pin 2 of the capacitor C4 via pin 2 of the proximal feedback first resistor R1, forming a voltage feedback positive electrode network Ph1_Sense_DP; pin 1 of the remote feedback series fourth resistor R4 is connected to pin 2 of the second capacitor C2 set at the power supply end of the load optical module, and pin 2 of the remote feedback fourth resistor R4 is connected to pin 1 of the capacitor C4 via pin 2 of the proximal feedback second resistor R2, forming a voltage feedback negative electrode network Ph1_Sense_DN.

[0076] Pin 1 of the first proximal feedback series resistor R1 is connected to pin 1 of the first capacitor C1 set at the output end of the first single-phase voltage conversion module Ph1, pin 2 of the proximal feedback first resistor R1 is connected to pin 2 of the third remote feedback resistor R3 to superimpose the voltage signal, and is connected to pin 2 of capacitor C4 to form a voltage feedback positive electrode network Ph1_Sense_DP; pin 1 of the second proximal feedback resistor R2 is connected to pin 2 of the first capacitor C1 set at the output end of the first single-phase voltage conversion module Ph1, pin 2 of the second proximal feedback resistor R2 is connected to pin 2 of the fourth remote feedback resistor R4 to superimpose the voltage signal, and is connected to pin 1 of capacitor C4 to form a voltage feedback negative electrode network Ph1_Sense_DN. For any single-phase voltage conversion module, that is, the first single-phase voltage conversion module Ph1 to the mth single-phase voltage conversion module Phm, there are superimposed positive voltage signals Phm_Sense_DP and negative voltage signals 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 the voltage divider network.

[0077] The third resistor R3 and the fourth resistor R4 of the remote voltage detection module are arranged in parallel near a corresponding set of loads, that is, the second capacitor C2 set at the power supply end of the optical module 1 and the optical module 2. The third resistor R3 and the fourth resistor R41 pins are connected to the 1 pin and the 2 pin of the second capacitor C2 respectively, and the input lead sampling point of the 1 pin of the third resistor R3 and the fourth resistor R4 comes from the pin of the second capacitor C2, not the copper foil of the power supply network. Sampling on the pin of the second capacitor C2 guarantees the low noise of the voltage feedback signal to the greatest extent. The voltage feedback signal is output at the 2 pins of the third resistor R3 and the fourth resistor R4, which are placed in parallel, and the voltage feedback signal Ph1_Sense_DP and Ph1_Sense_DN are a group of differential signal pairs. The layout and wiring of the line where the third resistor R3 and the line where the fourth resistor R4 are located are processed according to the differential signal to ensure that they are free from noise interference during the feedback path process. The voltage feedback signals Ph1_Sense_DP and Ph1_Sense_DN output from the pins 2 of the third resistor R3 and the fourth resistor R4 are respectively input on one side and output on the other side of the pins 2 of the corresponding proximal feedback resistors, the first resistor R1 and the second resistor R2, and continue to maintain the differential pair layout and routing into the pins 1 and 2 of the capacitor C4, and maintain the input from one side of the pin and the output from the other side, and output to the voltage divider network. The actual device signal routing method is as follows Figure 7 As shown in the figure, capacitors and resistors are two-port devices with two PIN pins, with the upper and lower ends being the device pins and the middle being the device body; the arrow indicates the required PCB routing of the device signal, with input from one side of the pin and output from the other side. The sampling point of the voltage feedback signal is not drawn from the power supply line between the single-phase voltage conversion module Ph and the load, but is drawn from the pin of the capacitor, which guarantees the low noise of the voltage feedback signal to the greatest extent.

[0078] The sampling method of the first and second pins of the proximal feedback resistors R1 and R2 is consistent with the sampling method of the first and fourth pins of the distal feedback resistors R3 and R4, and is led out separately on the sampling capacitor pin. That is, the first and second pins of the proximal feedback resistors R1 and R2 are sampled at the pin of the output capacitor C1 of the corresponding single-phase voltage conversion module Ph through PCB routing independent of the current-passing network of the same name and independent of the routing of the output power supply of the single-phase voltage conversion module Ph itself.

[0079] The differential pair signals Ph1_Sense_DP and Ph1_Sense_DN are input on one side of the pin 1 and pin 2 of the capacitor C4 through the PCB routing and output on the other side, thus being given to the voltage divider network. The other side of the pin 1 of the capacitor C4 leads out the PCB routing to the pin 1 side of the sixth resistor R6 for input, and the negative polarity signal DN is output to the controller 2 on the other side of the pin 1 of the sixth resistor R6; the other side of the pin 2 of the capacitor C4 leads out the PCB routing to the pin 2 side of the fifth resistor R5 for input, and enters the pin 2 side of the sixth resistor R6 through the fifth resistor R5 on the pin 1 side of the fifth resistor R5, and outputs the positive polarity signal DP to the controller 2 on the other side of the pin 2 of the sixth resistor R6; the other side of the pin 1 and pin 2 of the fifth resistor R5 are respectively connected in parallel with the two pins of the compensation network device of the compensation zero point module. m Ph and the corresponding load optical modules form m groups of far-end and near-end feedback networks, which are all connected to one side of the pin of the capacitor C4, and are fed back to the controller 2 through the voltage divider compensation network for pulse width modulation and other functions.

[0080] The third resistor R3 and the fourth resistor R4 of the remote feedback series resistor are located near the second capacitor C2C2 set at the corresponding load end; the first resistor R1 and the second resistor R2 of the near-end feedback series resistor are located near the corresponding single-phase voltage conversion module Ph output filter capacitor C1; the voltage divider network, capacitor C4 and compensation zero point module are arranged near the voltage feedback input pin of the controller 2. All the remote and near-end voltage feedback networks of the single-phase voltage conversion module Ph are differentially paired on the PCB, and all sampling points are independently sampled at the corresponding capacitor pins, which are distinguished from the power supply copper foil of the same network. When the remote differential pair signal is connected to the near-end feedback series resistor, it must enter from the pin side corresponding to the resistor and output from the other side to avoid the introduction of high-frequency noise.

[0081] As an optional embodiment, the voltage detection circuit further includes: A voltage signal processing module, wherein the first input end is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module, the second input end is respectively connected to the second output end of each proximal voltage detection module and each distal voltage detection module, and the output end is connected to the voltage reading end of the controller 2, and is used to superimpose the output voltages of all single-phase voltage conversion modules Ph and feed them back to the controller 2.

[0082] Considering that the power supply voltage actually output to each group of loads is the voltage after being transformed by the voltage conversion circuit, its voltage magnitude may have exceeded the range supported by the controller 2 itself, and at the same time, 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, so a voltage signal processing module is also provided in the voltage feedback network, which can, on the one hand, superimpose the output voltages of all single-phase voltage conversion modules Ph and feed them back to the controller 2, and on the other hand, play a role in voltage conversion, mainly in reducing the voltage, and convert the differential voltage signal to a normal range that the controller 2 can receive and process, so as to facilitate the operation of the controller 2. The specific type and implementation method of the voltage signal processing module are not particularly limited in this application, and can be implemented by circuits such as a voltage divider network.

[0083] Specifically, all single-phase voltage conversion modules Ph will participate in voltage feedback, so a voltage signal processing module needs to be set up to perform preliminary processing on the feedback voltage signal to facilitate the controller 2 to receive the signal, and complete the voltage differential feedback of each single-phase voltage conversion module Ph through the far-end, near-end and voltage-dividing compensation network, forming an umbrella-shaped feedback network as a whole, which can more accurately feedback the voltage information of each load point.

[0084] As an optional embodiment, the voltage signal processing module includes: A fifth resistor R5, a first end of which is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module; The sixth resistor R6 has a first end respectively connected to the first voltage reading end of the controller 2, the second output end of each proximal voltage detection module and the second output end of each distal voltage detection module, and a second end respectively connected to the second end of the fifth resistor R5 and the second voltage reading end of the controller 2.

[0085] It is understandable that the voltage signal processing module can be implemented by a voltage divider network composed of a fifth resistor R5 and a sixth resistor R6, and the voltage divider network is used to adjust the power supply voltage value required by the load side, and its impedance is in the order of magnitude of 1 kΩ and above. The specific impedance values ​​and implementation methods of the fifth resistor R5 and the sixth resistor R6 are not particularly limited in this application, and can be selected and set according to the power supply size of the power supply system in actual applications and the actual situation of the controller 2.

[0086] Specifically, a voltage divider circuit can effectively superimpose the differential voltage signal sampled from the load side to both ends of the voltage divider circuit, and convert it into a voltage signal within a range that can be directly processed by the controller 2 through voltage division. The circuit structure is simple and easy to implement.

[0087] As an optional embodiment, the voltage signal processing module further includes: A filtering module, wherein the first input end is respectively connected to the first output end of each proximal voltage detection module and each distal voltage detection module, the second input end is respectively connected to the second output end of each proximal voltage detection module and each distal voltage detection module, the first output end is connected to the first end of the fifth resistor R5, and the second output end is respectively connected to the first end of the sixth resistor R6 and the first voltage reading end of the controller 2.

[0088] It is not difficult 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 provided at the input end of the voltage divider resistor to filter the sampled differential voltage signal before outputting it to the voltage divider circuit. The specific type and implementation of the filtering module are not particularly limited in this application. Figure 5 As shown, capacitor C4 can be used to implement it. The positive polarity signals Ph1_Sense_DP…Phm_Sense_DP of the voltage differential feedback of each single-phase voltage conversion module Ph are 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 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 differential signals DP and DN are generated and fed back to the controller 2.

[0089] 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 a common input, and the other side of the pin serves as a common output. On the basis of the umbrella topology, setting 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.

[0090] As an optional embodiment, the voltage signal processing module further includes: The compensation zero point module has an output end connected to the output end of the voltage signal processing module and the voltage reading end of the controller 2 respectively, and is used to provide a compensation zero point for the controller 2.

[0091] It is understandable that in order to further improve the stability of the entire control system, a compensation zero point module can be further provided in the voltage divider network to introduce a compensation zero point, and cooperate with the voltage divider network to realize a voltage divider compensation network. The specific type and implementation method of the compensation zero point module are not particularly limited in this application.

[0092] Specifically, by adding a compensation zero point module to provide a compensation zero point for the control system, the performance of the entire control system and the voltage feedback circuit is effectively improved, the steady-state error is eliminated, and the stability of the entire control system is improved.

[0093] As an optional embodiment, the compensation zero point module is a third capacitor C3, the first end of the third capacitor C3 is respectively connected to the first end of the fifth resistor R5, the first output end of each proximal voltage detection module and the first output end of each remote voltage detection module, and the second end is respectively 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.

[0094] It is not difficult to understand that the compensation zero point can be specifically realized by setting a third capacitor C3, and the third capacitor C3 cooperates with the fifth resistor R5 in the voltage divider network to form a compensation network for adjusting the loop stability, and other compensation network forms can also be adopted, such as a resistor and a capacitor connected in series, and the series circuit is connected in parallel at both ends of the fifth resistor R5. The specific type and implementation method of the third capacitor C3 are not particularly limited in this application.

[0095] The present invention provides an umbrella network voltage feedback design and its layout and wiring design method. The entire voltage feedback network includes a third resistor R3 and a fourth resistor R4 for detecting a remote voltage, a first resistor R1 and a second resistor R2 for detecting a near-end voltage, a filtering module and a voltage divider compensation network. The far-end voltage differential signal of each load side is sampled and fed back at the pin 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, and is fed back to the filtering and voltage dividing network set at the controller 2 end through the pins of the first resistor R1 and the second resistor R2 connected in series at the near end, thereby completing the far-end voltage differential feedback; the near-end voltage differential signal of each Ph is sampled and fed back at the pin 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, and is superimposed with the far-end voltage signal fed back from the far end and fed back to the filtering and voltage dividing network at the controller 2 end, thereby completing the near-end voltage differential feedback; and then the near-end voltage differential feedback signals Ph1_Sense_DP&DN…Phm_Sense_DP&DN at the far end of each load group side and the corresponding output side of each single-phase voltage conversion module Ph are completed, and the voltage differential is fed back to the controller 2 end in an umbrella network topology as a whole. 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.

[0096] As an optional embodiment, for any proximal voltage detection module, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 are negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module Ph and the controller 2 .

[0097] As an optional embodiment, for any remote voltage detection module, the resistance value of the third resistor R3 and the resistance value of the fourth resistor R4 are both negatively correlated with the arrangement distance between the corresponding load and the controller 2 .

[0098] It is understandable that, due to the inconsistency of the power supply lines corresponding to the near end and the far end, and due to the dispersed layout of the load, the connection lines between different single-phase voltage conversion modules Ph and the controller 2 are also inconsistent. Therefore, when designing the corresponding voltage detection module, the resistance value of the resistor therein needs to be set according to the distance between the measurement point and the controller 2. The farther from the controller 2, the smaller the corresponding resistance impedance. At the same time, in order to ensure the accuracy of the differential signal, the impedance of the two resistors corresponding to a pair of differential signals is preferably kept consistent. Figure 5 As shown, R3=R4<R1=R2, and the impedance magnitude is less than or equal to 100Ω. The impedance size is related to the flow impedance and the setting position. The far-end and near-end network series resistances corresponding to each single-phase voltage conversion module Ph are different due to different positions and differences in flow impedance. Taking the controller 2 set at the center of all load distribution layouts as an example, in the distributed layout, the impedance difference of the resistance set at the symmetrical position symmetrical to the controller 2 is kept consistent as much as possible, so that the far-end and near-end series impedances of Ph at the symmetrical position are equal. Relative to the center position of the distributed symmetrical layout, the impedance tends to increase on both sides. The far-end and near-end series impedances of Ph farther from the center position are respectively smaller than the far-end and near-end series impedances of Ph closer to the center position, and are reduced according to the proportion corresponding to the flow impedance.

[0099] The impedance of the far-end feedback series resistor and the near-end feedback series resistor are not the same, which is related to the layout position and copper impedance. For example, R3=R4, but R3 in different single-phase voltage conversion modules Ph is not necessarily equal, and the impedance of R3 is smaller the farther away from the symmetry center; the same is true for the near-end feedback series resistor, such as R1=R2, but R1 in different single-phase voltage conversion modules Ph is not necessarily equal, and the impedance is smaller the farther away from the symmetry center; but the symmetrical position is generally set to a consistent impedance, and the far-end and near-end feedback are reduced to maintain the same or approximate proportional relationship at the same Ph.

[0100] Specifically, by designing a current synthesis and current feedback design anti-interference method and an umbrella network voltage feedback design and layout and wiring design method, a power supply system suitable for the distribution of optical module arrays is realized. The packet loss problem caused by crosstalk noise, far-end and near-end voltage imbalance and other factors existing 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, as well as the heat dissipation problem caused by hot spot concentration are solved.

[0101] See also Figure 8 As shown, Figure 8A flow chart of a control method for a power supply system provided by an embodiment of the present invention; To solve the above technical problems, an embodiment of the present invention further provides a control method for a power supply system, which is applied to a controller of the power supply system as described above, and the control method for the power supply system includes:

[0102] S11: Obtaining the operating current of each single-phase voltage conversion module through the current detection circuit of the power supply system.

[0103] S12: adjusting the control signal output to the corresponding single-phase voltage conversion module based on the operating current of each single-phase voltage conversion module.

[0104] As a specific embodiment, see Fig. 9 As shown, Fig. 9 A schematic diagram of the structure of a controller provided in an embodiment of the present invention. The controller may include: a memory 60 for storing a computer program; a processor 61 for implementing the steps of the control method of the power supply system as described above when executing the computer program. Among them, 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 in at least one hardware form of 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 awake 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 be integrated with a graphics processing unit (GPU), and the GPU is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 61 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0105] 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, flash memory storage devices. In this embodiment, the memory 60 is at least used to store the following computer program 601, wherein, after the computer program is loaded and executed by the processor 61, it can implement the relevant steps of the control method of the power supply system disclosed in any of the aforementioned 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. Among them, the operating system 602 may include Windows, Unix, Linux, etc. The data 603 may include but is not limited to data in the control method of the power supply system, etc. In some embodiments, the controller may also include a display screen 62, an input and output interface 63, a communication interface 64, a power supply 65 and a communication bus 66. Those skilled in the art will understand that Fig. 9 The structure shown in the figure does not constitute a limitation on the controller, and may include more or fewer components than shown in the figure.

[0106] For the description of the features in the control method of the power supply system provided in the embodiment of the present invention, reference can be made to the relevant description of the embodiment of the power supply system mentioned above, which will not be described in detail here.

[0107] It is understandable that if the control method of the power supply system in the above embodiment is implemented in the form of 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, and the computer software product is stored in a storage medium to execute all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), electrically erasable programmable ROM, register, hard disk, removable disk, CD-ROM, magnetic disk or optical disk, etc. Various media that can store program codes.

[0108] Based on this, an embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the power supply system as described above are implemented.

[0109] For the description of the features in the computer-readable storage medium provided in the embodiments of the present invention, reference can be made to the relevant description of the embodiments of the above-mentioned power supply system and control method thereof, which will not be described in detail here.

[0110] Based on this, an embodiment of the present invention further provides a non-volatile storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the power supply system as described above are implemented.

[0111] For the description of the features of the non-volatile storage medium provided in the embodiments of the present invention, reference can be made to the relevant description of the embodiments of the power supply system and the control method thereof, which will not be described in detail here.

[0112] To solve the above technical problem, an embodiment of the present invention further provides a computer program product, including a computer program / instruction, which implements the steps of the aforementioned power supply system control method when executed by a processor.

[0113] For descriptions of features in the computer program product provided in the embodiments of the present invention, reference can be made to the relevant descriptions of the embodiments of the power supply system and the control method thereof, which will not be described in detail here.

[0114] The above is a detailed introduction to a power supply system and a control method, a storage medium, and a program product provided by an embodiment of the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0115] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0116] The above is a detailed introduction to a power supply system and its control method, storage medium, and program product provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A power supply system, characterized in that: include: A voltage conversion circuit, wherein the voltage conversion circuit comprises a plurality of single-phase voltage conversion modules, wherein one single-phase voltage conversion module corresponds to a group of loads, and an output end thereof is connected to the corresponding group of loads; and the output ends of all the single-phase voltage conversion modules are connected to each other; A current detection circuit, the input end of which is respectively connected to each single-phase voltage conversion module in the voltage conversion circuit, and is used to detect the working current of each single-phase voltage conversion module; A controller, whose input end is connected to the output end of the current detection circuit, and whose output end is respectively connected to the control end of each of the single-phase voltage conversion modules, is used to adjust the control signal output to the corresponding single-phase voltage conversion module based on the working current of each of the single-phase voltage conversion modules.

2. The power supply system according to claim 1, characterized in that: The single-phase voltage conversion module comprises: A first switch tube, a first end of which is connected to the positive electrode of the power supply; A second switch tube, a first end of which serves as a negative output end of the single-phase voltage conversion module, is connected to the negative electrode of the power supply and is grounded; An inductor, wherein the first end is respectively connected to the second end of the first switch tube and the second end of the second switch tube, and the second end serves as the positive output end of the single-phase voltage conversion module and is respectively connected to the positive output ends of other single-phase voltage conversion modules except itself.

3. The power supply system according to claim 2, characterized in that: The current detection circuit comprises: a first current extraction module, wherein a first input end is connected to the second end of the first switch tube, a second input end is respectively connected to the second end of the second switch tube and the first end of the inductor, and an output end is connected to the input end of the controller, and is used to extract a first current flowing through the first switch tube; A second current extraction module, wherein a first input end is connected to the second end of the second switch tube, a second input end is respectively connected to the second end of the first switch tube and the first end of the inductor, and an output end is connected to the input end of the controller, and is used to extract a second current flowing through the second switch tube.

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

5. The power supply system according to claim 3, characterized in that: The first current extraction module and the second current extraction module are both current mirrors.

6. The power supply system according to claim 1, characterized in that: Each of the single-phase voltage conversion modules is arranged adjacent to a corresponding group of loads.

7. The power supply system according to any one of claims 1 to 6, characterized in that: Also includes: A voltage detection circuit, whose input end is respectively connected to the output end of each single-phase voltage conversion module in the voltage conversion circuit, and whose output end is connected to the voltage reading end of the controller, is used to detect the output voltage of each single-phase voltage conversion module; 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.

8. The power supply system according to claim 7, characterized in that: The voltage detection circuit comprises: A plurality of proximal voltage detection modules connected to the plurality of single-phase voltage conversion modules in a one-to-one correspondence, wherein the first input end is connected to the positive output end of the corresponding single-phase voltage conversion module, the second input end is connected to the negative output end of the corresponding single-phase voltage conversion module, the first output end is connected to the first voltage reading end of the controller, and the second output end is connected to the second voltage reading end of the controller; A plurality of remote voltage detection modules are connected one-to-one with the plurality of single-phase voltage conversion modules, wherein 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.

9. The power supply system according to claim 8, characterized in that: The proximal voltage detection module comprises: A first capacitor, wherein a first side of two end pins of the first capacitor is connected in parallel with an output end of a corresponding single-phase voltage conversion module; a first resistor, a first end of which is connected to the second side of the first pin of the first capacitor, and a second end of which is connected to the first voltage reading terminal of the controller; A second resistor has a first end connected to the second side of the second pin of the first capacitor, and a second end connected to the second voltage reading end of the controller.

10. The power supply system according to claim 8, characterized in that: The remote voltage detection module comprises: A second capacitor, wherein a first side of two end pins of the second capacitor is connected in parallel to a power supply end of a corresponding load; a third resistor, a first end of which is connected to the second side of the first pin of the second capacitor, and a second end of which is connected to the first voltage reading terminal of the controller; A fourth resistor has a first end connected to the second side of the second pin of the second capacitor, and a second end connected to the second voltage reading terminal of the controller.

11. The power supply system according to claim 8, characterized in that: The voltage detection circuit also includes: A voltage signal processing module, wherein the first input end is respectively connected to the first output end of each of the proximal voltage detection modules and each of the remote voltage detection modules, the second input end is respectively connected to the second output end of each of the proximal voltage detection modules and each of the remote voltage detection modules, and the output end is connected to the voltage reading end of the controller, and is used to superimpose the output voltages of all the single-phase voltage conversion modules and feed them back to the controller.

12. The power supply system according to claim 11, characterized in that: The voltage signal processing module comprises: a fifth resistor, a first end of which is respectively connected to the first output end of each of the proximal voltage detection modules and each of the remote voltage detection modules; The sixth resistor, the first end is respectively connected to the first voltage reading end of the controller, the second output end of each of the proximal voltage detection modules and the second output end of each of the remote voltage detection modules, and the second end is respectively connected to the second end of the fifth resistor and the second voltage reading end of the controller.

13. The power supply system according to claim 12, characterized in that: The voltage signal processing module also includes: A filtering module, wherein the first input end is respectively connected to the first output end of each of the proximal voltage detection modules and each of the remote voltage detection modules, the second input end is respectively connected to the second output end of each of the proximal voltage detection modules and each of the remote voltage detection modules, the first output end is connected to the first end of the fifth resistor, and the second output end is respectively connected to the first end of the sixth resistor and the first voltage reading end of the controller.

14. The power supply system according to claim 12, characterized in that: The voltage signal processing module also includes: A compensation zero point module, whose output end is respectively connected to the output end of the voltage signal processing module and the voltage reading end of the controller, is used to provide a compensation zero point for the controller.

15. The power supply system according to claim 14, characterized in that: The compensation zero point module is a third capacitor, the first end of the third capacitor is respectively connected to the first end of the fifth resistor, the first output end of each of the proximal voltage detection modules and the first output end of each of the remote voltage detection modules, and the second end is respectively 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.

16. The power supply system according to claim 9, characterized in that: For any proximal voltage detection module, the resistance value of the first resistor and the resistance value of the second resistor are both negatively correlated with the arrangement distance between the corresponding single-phase voltage conversion module and the controller.

17. The power supply system according to claim 10, characterized in that: For any remote voltage detection module, the resistance value of the third resistor and the resistance value of the fourth resistor are both negatively correlated with the arrangement distance between the corresponding load and the controller.

18. A control method for a power supply system, characterized in that: A controller applied to a power supply system according to any one of claims 1 to 17, wherein the control method of the power supply system comprises: Acquiring the operating current of each of the single-phase voltage conversion modules 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.

19. A non-volatile storage medium, characterized in that: The non-volatile storage medium stores a computer program, and when the computer program is executed by the processor, the steps of the control method of the power supply system as claimed in claim 18 are implemented.

20. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the power supply system control method according to claim 18 are implemented.

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