Power supply system and control method and device of power supply system

Abstract

The embodiment of the invention provides a power supply system and a control method and device of the power supply system. The method comprises the steps that a conversion circuit is adopted to control a first direct-current power supply to supply power to the power supply system; and controlling the second direct-current power supply to supply power to the power supply system by adopting the conversion circuit in response to the first direct-current power supply outage. Through the method and the device, the problems of communication interruption and data loss caused by PSU power downtime and server interruption due to the fact that single-path HVDC input cannot completely achieve safe and reliable power supply and extreme conditions such as power failure of the input in the prior art are solved, real-time monitoring of the power supply state and automatic switching under abnormal conditions are realized, and the power supply reliability is improved. According to the invention, uninterrupted operation of key occasions such as a server or a data center is ensured, and the effects of remarkably improving the stability and reliability of the power supply, greatly reducing the system interruption time caused by power supply faults, and improving the continuity of key services and the security of data are achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic technology, and in particular to a power supply system, and a control method and device for the power supply system. Background Art

[0002] The server shelf power supply architecture is one of the important trends in the development of data center power supply structure. The server shelf power supply architecture only supports high voltage direct current (HVDC) input, with a typical value of 400Vdc. The main power part is only a first-level DC-DC conversion with high conversion efficiency, and the theoretical efficiency can reach up to 98%.

[0003] The current server shelf power supply architecture with hot-swap & slow start control can realize the safe hot-swap operation of the module power supply, and finally achieve the goal of N+1 redundant power supply, while increasing maintainability. In the case of module damage, it can be replaced safely and conveniently. However, a single HVDC input cannot really provide safe and reliable power supply. If the input is out of power or other extreme situations, it will cause the power supply unit (PSU) to shut down, and then the server will be interrupted, resulting in communication interruption and data loss.

[0004] There is no effective solution to the above problems yet. Summary of the invention

[0005] The embodiments of the present application provide a power supply system, a control method and a device for the power supply system, so as to at least solve the problem in the related art that a single HVDC input cannot completely ensure safe and reliable power supply. When an extreme situation such as a power outage occurs in the input, it will cause the PSU power supply to crash and the server to be interrupted, which will in turn cause communication interruption and data loss.

[0006] According to one embodiment of the present application, a power supply system is provided, including: a power supply circuit, an anti-reverse circuit, a conversion circuit, a relay circuit and an energy storage capacitor, the power supply circuit including a first DC power supply and a second DC power supply, the first DC power supply and the second DC power supply are used to independently supply power to the power supply system, the power supply circuit is electrically connected to the anti-reverse circuit, the anti-reverse circuit is used to protect the power supply system when the power supply circuit is reversely connected, the anti-reverse circuit is electrically connected to the conversion circuit, the conversion circuit is used to control the second DC power supply to supply power to the power supply system when the first DC power supply is powered off, the conversion circuit is electrically connected to the relay circuit, the relay circuit is used to control the output current of the power supply system, the relay circuit is electrically connected to the energy storage capacitor, and the energy storage capacitor is used to supply power to the power supply system when the conversion circuit performs power switching.

[0007] In an exemplary embodiment, the anti-reverse circuit in the power supply system includes a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, the conversion circuit includes a first conversion circuit and a second conversion circuit, the first conversion circuit is used to control the conduction state of the positive electrode of the first DC power supply and the conduction state of the positive electrode of the second DC power supply, the second conversion circuit is used to control the conduction state of the negative electrode of the first DC power supply and the conduction state of the negative electrode of the second DC power supply, the relay circuit includes a target relay, a first resistor, a second resistor and a target transistor; the positive electrode of the first DC power supply is electrically connected to the anode of the first rectifier diode, and the cathode of the first rectifier diode is electrically connected to the cathode of the first conversion circuit. The first end of the circuit is electrically connected, the output end of the first conversion circuit is electrically connected to the first end of the target relay, and the second end of the target relay is electrically connected to the first end of the energy storage capacitor; the negative electrode of the first DC power supply is electrically connected to the cathode of the second rectifier diode, the anode of the second rectifier diode is electrically connected to the first end of the second conversion circuit, and the output end of the second conversion circuit is electrically connected to the second end of the energy storage capacitor; the positive electrode of the second DC power supply is electrically connected to the anode of the third rectifier diode, and the cathode of the third rectifier diode is electrically connected to the second end of the first conversion circuit; the negative electrode of the second DC power supply is electrically connected to the cathode of the fourth rectifier diode, and the anode of the fourth rectifier diode is electrically connected to the second end of the second conversion circuit.

[0008] In an exemplary embodiment, the power supply system also includes: a control circuit and a power supply circuit, the energy storage capacitor is electrically connected to the control circuit, the control circuit is used to protect the power supply system, the control circuit is electrically connected to the power supply circuit, the power supply circuit is used to convert the input power, and the power supply circuit is electrically connected to the target connector on the server motherboard through the gold-plated layer to supply power to the server motherboard.

[0009] In an exemplary embodiment, the power supply circuit in the power supply system includes a full-bridge circuit, a transformer, a rectifier and filter circuit, and an OR gate circuit. The control circuit is electrically connected to the full-bridge circuit, the full-bridge circuit is electrically connected to the transformer, the transformer is electrically connected to the rectifier and filter circuit, and the rectifier and filter circuit is electrically connected to the OR gate circuit.

[0010] According to one embodiment of the present application, a control method for a power supply system is provided, which is applied to the above-mentioned power supply system, including: using a conversion circuit to control a first DC power supply to supply power to the power supply system; in response to power failure of the first DC power supply, using a conversion circuit to control a second DC power supply to supply power to the power supply system, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

[0011] In an exemplary embodiment, before the first DC power source is powered off, the method further includes: pre-charging the energy storage capacitor based on the first resistor.

[0012] In an exemplary embodiment, the control method of the power supply system further includes: determining a voltage difference between an input voltage of the relay circuit and a voltage of the energy storage capacitor; and controlling a target relay to close in response to the voltage difference being less than a preset voltage threshold.

[0013] In an exemplary embodiment, before using the conversion circuit to control the second DC power supply to supply power to the power supply system, the method also includes: in response to the first DC power supply being powered off, controlling the target relay to disconnect; after the target relay is disconnected, controlling the energy storage capacitor to supply power to the power supply system.

[0014] In an exemplary embodiment, using a conversion circuit to control the second DC power supply to supply power to the power supply system includes: using a conversion circuit to control the first DC power supply to stop working, and using a conversion circuit to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system.

[0015] In an exemplary embodiment, the control method of the power supply system further includes: in response to the input voltage of the relay circuit lasting a preset time period, controlling the target relay to close and driving the target transistor; in response to the target relay closing successfully, stopping driving the target transistor.

[0016] In an exemplary embodiment, the control method of the power supply system further includes: in response to the second DC power supply stably supplying power to the power supply system, controlling the energy storage capacitor to stop supplying power to the power supply system, and pre-charging the energy storage capacitor based on the first resistor.

[0017] According to another embodiment of the present application, a control device for a power supply system is provided, which is applied to the above-mentioned power supply system, including: a first control module, used to adopt a conversion circuit to control the first DC power supply to supply power to the power supply system; a second control module, used to respond to power failure of the first DC power supply, and adopt a conversion circuit to control the second DC power supply to supply power to the power supply system, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

[0018] In an exemplary embodiment, the second control module is further used to use a conversion circuit to control the first DC power supply to stop working, and use a conversion circuit to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system.

[0019] According to another embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when run.

[0020] According to another embodiment of the present application, an electronic device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0021] According to another embodiment of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0022] Through the control method of the power supply system provided by the present application, the power supply circuit of the power supply system includes a first DC power supply and a second DC power supply, and the first DC power supply and the second DC power supply can independently supply power to the power supply system. A conversion circuit is used to control the first DC power supply to supply power to the power supply system, and when the first DC power supply is powered off, a conversion circuit is used to control the second DC power supply to supply power to the power supply system. Therefore, the present application can solve the problem in the related art that the single-channel HVDC input cannot completely achieve safe and reliable power supply. When the input is powered off or other extreme situations occur, it will cause the PSU power supply to crash and the server to be interrupted, thereby causing communication interruption and data loss. It realizes real-time monitoring of the power supply status and automatic switching under abnormal conditions, ensuring the uninterrupted operation of key occasions such as servers or data centers, achieving significantly improved stability and reliability of the power supply, greatly reducing the system interruption time caused by power failure, and improving the continuity of key services and the security of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a diagram of the server shelf power supply architecture with hot-swap & slow-start control;

[0024] Figure 2 It is a DC-DC circuit diagram with dual-channel high-voltage DC power supply and conversion control that can realize hot plug & soft start control according to the embodiment of the present application;

[0025] Figure 3 It is a dual-channel high-voltage direct current power supply and conversion control circuit diagram according to an embodiment of the present application;

[0026] Figure 4 is a flow chart of a control method for a power supply system according to an embodiment of the present application;

[0027] Figure 5 It is a structural block diagram of a control device of a power supply system according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] For ease of understanding, some concepts related to the embodiments of the present invention are exemplarily described for reference, as shown below:

[0029] Gold Finger: Gold fingers usually refer to the gold-plated contact points on the edge of a circuit board or electronic module, which are used to form a reliable electrical connection with the pins in a slot or connector. In servers, gold fingers are used for signal and power transmission between the motherboard and the power module and memory module.

[0030] Soft Start: Soft Start is a technique used to gradually increase the output voltage when the power supply is turned on to prevent excessive surge current from damaging the power supply and load. By controlling the voltage rise rate, the soft start circuit can protect the power supply and load from shock.

[0031] Automatic Transfer Switch (ATS): ATS is an electrical device used to automatically switch between the main power source and the backup power source to ensure uninterrupted power supply. When the main power source fails, the ATS switches to the backup power source within milliseconds to keep the system running.

[0032] Relay control: In the power system, a relay is a switch used to connect or disconnect the main power line. When the system starts, the relay is initially disconnected to prevent excessive inrush current from being generated when energy storage elements such as capacitors are charged. When the system is ready, the relay is pulled in by a control signal to connect the main power line.

[0033] Inrush current control: Inrush current refers to the instantaneous large current generated when the capacitor in the circuit starts to charge when the power system is started or reclosed. This large current may cause adverse effects such as overheating of the capacitor, magnetic saturation of the transformer, and instantaneous voltage drop on the power grid. In order to limit the Inrush current, a thermistor such as a PTC (Positive Temperature Coefficient thermistor), an NTC (Negative Temperature Coefficient thermistor) thermistor or a special Inrush current limiting circuit is usually added to the circuit.

[0034] Secondary Rectification + Filtering: Secondary rectification and filtering are two steps in power conversion, which are used to convert the AC output of the transformer into smooth DC. The rectifier converts the AC into pulsating DC, and the filter smoothes the voltage and removes clutter.

[0035] Oring circuit: An Oring circuit is a circuit used in power redundancy configurations that allows multiple power supplies to be connected to the load at the same time, but only one power supply actually powers the load. When the main power supply fails, the Oring circuit automatically allows the backup power supply to start supplying power to keep the system running continuously.

[0036] Power Factor Correction (PFC): PFC is a technique used to improve the power factor of a power supply, bringing it closer to 1. The power factor reflects the ratio of the power actually used by the power supply to the total input power, and PFC helps reduce power losses and improve power efficiency.

[0037] Insulated Gate Bipolar Transistor (IGBT): Insulated Gate Bipolar Transistor is a composite power electronic device that combines the advantages of MOSFET (metal-oxide-semiconductor field-effect transistor) and BJT (bipolar transistor). IGBT has the characteristics of high input impedance, low driving power, fast switching speed, and ability to withstand large currents. It is widely used in inverters, frequency converters, power switches and other occasions. In this technical disclosure book, IGBT is used to control and regulate current conduction, especially inrush current control at circuit startup, and to protect the circuit from impact during relay switching.

[0038] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0040] Figure 1 This is a diagram of the server shelf power supply architecture with hot-swap & slow-start control, such as Figure 1As shown, the input is a high-voltage direct current of 400Vdc, followed by the main relay and inrush circuit, which are used to realize the normal power-on and inrush control of the PSU. Behind the main relay is a bulk capacitor, which is used to store energy. When the main power is off, the bulk capacitor powers the system and completes the backup power switch. Behind the bulk capacitor is a slow start circuit, which is used to realize the safe hot-swap operation of the module power supply, realize N+1 redundant power supply, and realize maintainability; after the slow start circuit is the power supply of each module, each module power supply is a first-level DC-DC conversion, and outputs 12Vdc. N+1 modules are connected together inside the PSU. The PSU is compatible with the standard Common Redundant Power Supply (CRPS) size and gold finger connector on the outside, and is connected to the gold finger connector on the motherboard through the gold finger to power the server motherboard.

[0041] Although the current server shelf power supply architecture with hot-swap & slow-start control realizes the N+1 redundant power supply structure of the module power supply, improves the system power supply safety and maintainability. When a module is damaged, it can be replaced by safe plugging and unplugging. However, the system power supply is not absolutely safe and reliable because there is only one high-voltage DC input. In extreme cases, when the input is powered off, it will cause the PSU to crash and the server to be interrupted.

[0042] According to an embodiment of the present application, a power supply system is provided. Figure 2 This is a DC-DC circuit diagram with dual-channel high-voltage DC power supply and conversion control that can realize hot plug & soft start control according to the embodiment of the present application, such as Figure 2 As shown, the power supply system includes: a power supply circuit, an anti-reverse circuit, a conversion circuit, a relay circuit and an energy storage capacitor.

[0043] Among them, the power supply circuit includes a first DC power supply and a second DC power supply, the first DC power supply and the second DC power supply are used to independently supply power to the power supply system, the power supply circuit is electrically connected to the anti-reverse circuit, the anti-reverse circuit is used to protect the power supply system when the power supply circuit is reversely connected, the anti-reverse circuit is electrically connected to the conversion circuit, the conversion circuit is used to control the second DC power supply to supply power to the power supply system when the first DC power supply is powered off, the conversion circuit is electrically connected to the relay circuit, the relay circuit is used to control the output current of the power supply system, the relay circuit is electrically connected to the energy storage capacitor, and the energy storage capacitor is used to supply power to the power supply system when the conversion circuit performs power switching.

[0044] In an embodiment of the present invention, the power supply circuit is one of the most basic circuits in an electronic device, including a first DC power supply main circuit HVDC_A and a second DC power supply backup HVDC_B. The main function of the power supply circuit is to convert an external power supply (such as AC or DC) into the voltage and current levels required by the electronic system. The power supply circuit usually includes rectification, voltage stabilization, filtering and other links to ensure that the output voltage is stable and pure, and provide a reliable power supply for the system. By introducing HVDC_B as a backup power supply, the system realizes a redundant design and enhances the reliability and safety of power supply.

[0045] In an embodiment of the present invention, the anti-reverse circuit is designed to prevent the reverse polarity of the power input from causing damage to the system. In a DC power supply system, if the positive and negative poles of the power supply are mistakenly connected in reverse, it may cause damage to components in the circuit or even cause a fire. The anti-reverse circuit in the present application is connected with a rectifier diode to achieve rectification and anti-reverse functions. When the input polarity is detected to be reversed, the circuit will prevent the current from passing through to protect the system safety.

[0046] In the embodiment of the present invention, the conversion circuit in this application refers to a circuit for switching different power paths, that is, an ATS circuit. For example, the ATS circuit can automatically switch the load from the first DC power supply main circuit HVDC_A to the second DC power supply backup HVDC_B according to the change of the power supply state, thereby ensuring that when the main power supply fails, the system can continue to supply power from the backup power supply, which is not limited here.

[0047] In the embodiment of the present invention, the relay circuit is a circuit that uses a relay to control the on and off of the circuit. A relay is an electrical control device that can control the on and off of a high-power circuit through electromagnetic action under a low-power control signal. In a power supply circuit, a relay is often used to control the path of high current and high voltage. For example, in a server power supply, a relay is used to control the input and output of high-voltage direct current and protect the circuit from impact when the power supply is switched, which is not limited here.

[0048] In an embodiment of the present invention, the energy storage capacitor is used in the power supply circuit to store and release electrical energy to maintain the stability of the output voltage. In a high-voltage DC power supply circuit, the energy storage capacitor (i.e., Bulk capacitor) is usually located at the output end of the power conversion circuit. When the input power supply is interrupted or fluctuates for a short time, the energy storage capacitor can provide sufficient energy to maintain the normal operation of the circuit until the backup power supply takes over or the input power supply returns to stability. The capacity of the energy storage capacitor is usually large to ensure that sufficient energy buffer can be provided during power conversion.

[0049] In an exemplary embodiment, Figure 3 is a dual-channel high-voltage DC power supply and conversion control circuit diagram according to an embodiment of the present application, such as Figure 3As shown, the anti-reverse circuit in the power supply system includes a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, the conversion circuit includes a first conversion circuit and a second conversion circuit, the first conversion circuit is used to control the conduction state of the positive electrode of the first DC power supply and the conduction state of the positive electrode of the second DC power supply, the second conversion circuit is used to control the conduction state of the negative electrode of the first DC power supply and the conduction state of the negative electrode of the second DC power supply, and the relay circuit includes a target relay, a first resistor, a second resistor and a target transistor.

[0050] Among them, the positive electrode of the first DC power supply is electrically connected to the anode of the first rectifier diode, the cathode of the first rectifier diode is electrically connected to the first end of the first conversion circuit, the output end of the first conversion circuit is electrically connected to the first end of the target relay, and the second end of the target relay is electrically connected to the first end of the energy storage capacitor; the negative electrode of the first DC power supply is electrically connected to the cathode of the second rectifier diode, the anode of the second rectifier diode is electrically connected to the first end of the second conversion circuit, and the output end of the second conversion circuit is electrically connected to the second end of the energy storage capacitor; the positive electrode of the second DC power supply is electrically connected to the anode of the third rectifier diode, and the cathode of the third rectifier diode is electrically connected to the second end of the first conversion circuit; the negative electrode of the second DC power supply is electrically connected to the cathode of the fourth rectifier diode, and the anode of the fourth rectifier diode is electrically connected to the second end of the second conversion circuit.

[0051] Specifically, Figure 3The dual-channel high-voltage DC system in the system is first connected to the rectifier diode to realize the rectification and anti-reverse function; the two high-voltage DCs are combined into one high-voltage DC after the ATS relay. That is, the HVDC_A high-voltage DC is normally powered, and the HVDC_B is the backup power supply; the ATS circuit is followed by the main relay to realize normal startup and inrush control. When the HVDC_A power supply is normally connected, the bulk capacitor is pre-charged by the PTC resistor. When the voltage difference between the input voltage and the output voltage is less than 10V, the pre-charging is considered to be completed. At this time, the main relay is energized, and the DC-DC circuit can start normally. When the HVDC_A high-voltage DC fails to power off, due to the presence of the rectifier diode, the Bulk bus voltage is disconnected from the input, and the system can normally detect the power supply status of the HVDC_A channel. When the power supply abnormality of the A channel exceeds the T1 time continuously, the system considers that the HVDC_A channel has lost power. At this time, the main relay is disconnected first. After the relay is disconnected, the load is powered by the bulk capacitor. After the main relay is disconnected, the ATS relay switches the power supply from HVDC_A to HVDC_B. Because the main relay is disconnected at this time, there is no great stress on the ATS switching. When the system detects that the Vin voltage lasts for T2 time, it can be considered that the HVDC_B power supply has been switched. After the HVDC_B power supply is cut in, normal startup operation is performed to attract the main relay and drive the IGBT. Before the relay is mechanically attracted, the Inrush current goes through the NTC+IGBT path to control the Inrush current. After the relay is normally attracted, the IGBT drive is disconnected. When the input is reversed, due to the presence of the anti-reverse diode, the reverse voltage cannot enter the system, which can protect the system safety; the positive and negative line voltages are judged by voltage detection. When the RTN voltage signal size time exceeds T3, it can be considered that the input is reversed. In the dual-channel high-voltage DC power supply system of this application, only a single relay is needed to connect the positive and negative lines. The number of relays used can be reduced, saving costs. Figure 3 As shown, if the contacts of line A are stuck at this time, when the relay switches from line HVDC_A to line HVDC_B, due to the existence of the anti-reverse diode, the power supply of line HVDC_B will not be pulled down by line HVDC_A, and line HVDC_B can still be safely connected.

[0052] In the embodiment of the present invention, the input diode has three main functions: the first is to disconnect the input voltage and the bus voltage to ensure that the input voltage can be monitored in real time; the second is to prevent reverse connection. When reverse connection occurs, the system will not be damaged; the third is to reduce the number of ATS relays to ensure safe access to the backup power supply, which is not restricted here.

[0053] In the embodiment of the present invention, the target relay is Figure 3The main relay in the circuit is used to control the connection or disconnection of the high-voltage DC input, or to achieve automatic switching between power sources. When the control signal is activated, the contacts inside the relay close or open, thereby changing the state of the circuit.

[0054] In the embodiment of the present invention, the first resistor can be understood as Figure 3 For example, when the HVDC_A power supply is normally connected, the PTC resistor pre-charges the Bulk capacitor, which is not limited here.

[0055] In the embodiment of the present invention, the second resistor can be understood as Figure 3 For example, when the HVDC_B power supply is cut in, the normal startup operation is performed to attract the main relay and drive the IGBT. Before the relay is mechanically attracted, the Inrush current goes through the NTC resistor + IGBT, thereby achieving the control of the Inrush current, which is not limited here.

[0056] In the embodiment of the present invention, the target transistor can be understood as Figure 3 The IGBT in the circuit is used as a switch to control the on and off of the current in the circuit. For example, in a slow start circuit, the transistor may be used to control the size of the charging current, or in an ATS circuit, it is used to drive the coil of a relay to control the switching between power sources.

[0057] In an exemplary embodiment, Figure 2 The DC-DC circuit diagram with dual-channel high-voltage DC power supply and conversion control that can realize hot plug & slow start control according to the embodiment of the present application is shown in FIG. Figure 2 It can be seen that the power supply system also includes: a control circuit and a power supply circuit, the energy storage capacitor is electrically connected to the control circuit, the control circuit is used to protect the power supply system, the control circuit is electrically connected to the power supply circuit, the power supply circuit is used to convert the input power, and the power supply circuit is electrically connected to the target connector on the server motherboard through the gold-plated layer to supply power to the server motherboard.

[0058] In the embodiment of the present invention, the control circuit can be understood as Figure 2Hot-swap & soft-start control circuit in the server. Among them, the hot-swap control circuit allows the power module to be safely inserted or removed during server operation without affecting the normal operation of the server or causing damage to the power module itself. It is usually achieved by controlling relays and other switching devices in the circuit to ensure that the current in the circuit can smoothly transition when the module is inserted or removed to avoid excessive transient current shocks, which helps to improve the maintainability and redundancy of the system. The soft-start control circuit is designed to limit the inrush current when the power supply is started, that is, the high current peak that occurs at the moment the circuit is turned on. It can not only protect the internal components of the power module from damage due to current overload, but also avoid unnecessary shocks to other components of the server. The soft-start circuit usually limits the charging rate of the bus capacitor by controlling the conduction degree of the transistor or using a charging resistor to ensure a smooth and controllable power startup process.

[0059] In the embodiment of the present invention, the power supply circuit can be understood as Figure 2 PSU1 to PSUx in the power supply circuit. The power supply circuit can convert the input power (whether AC or DC) into a stable DC power suitable for the internal circuit of the device. For example, it converts the input high-voltage DC (such as 400Vdc) into the low-voltage DC (such as 12Vdc) required by the internal circuit of the device, which is not limited here.

[0060] In the embodiment of the present invention, the target connector and the gold-plated layer can be understood as Figure 2 The gold finger connector in the server motherboard. Exemplarily, the gold finger connector is responsible for establishing a reliable electrical connection between the power module and the server motherboard. Each gold finger (gold-plated contact point) corresponds to a specific function on the motherboard, such as voltage signal, data communication, control signal, etc. This connection ensures that the power module can correctly supply power to the server motherboard and receive instructions from the motherboard, which is not limited here.

[0061] In an exemplary embodiment, Figure 2 The DC-DC circuit diagram with dual-channel high-voltage DC power supply and conversion control that can realize hot plug & slow start control according to the embodiment of the present application is shown in FIG. Figure 2 It can be seen that the power supply circuit in the power supply system includes a full-bridge circuit, a transformer, a rectifier and filter circuit and an OR gate circuit. The control circuit is electrically connected to the full-bridge circuit, the full-bridge circuit is electrically connected to the transformer, the transformer is electrically connected to the rectifier and filter circuit, and the rectifier and filter circuit is electrically connected to the OR gate circuit.

[0062] In the embodiment of the present invention, the full-bridge circuit is a circuit structure composed of four switching devices (usually transistors), which is used in DC-DC or AC-DC power conversion to achieve high-efficiency energy conversion. For example, in a DC-DC converter, the full-bridge circuit is usually used for step-up or step-down conversion, and the input DC power is converted into AC power by alternating conduction of the switching transistors, and then the voltage is converted back to DC power by a transformer, which is not limited here.

[0063] In the embodiment of the present invention, the transformer is a stationary electrical device used to convert the voltage of alternating current between different voltage levels without changing its frequency. The transformer works on the principle of electromagnetic induction to transfer electrical energy from one winding (primary winding) to another winding (secondary winding). In the power conversion circuit, the transformer is used to convert the AC voltage generated by the full-bridge circuit to a voltage level suitable for the load.

[0064] In the embodiment of the present invention, the rectifier and filter circuit can be understood as Figure 2 The secondary side rectification + filtering in the circuit is used to convert AC power into DC power, and smooth the DC voltage through the filter to remove the AC component and voltage ripple. The rectification part is usually composed of a rectifier diode or a bridge rectifier to convert AC power into pulsating DC power; the filtering part uses a filter composed of capacitors and inductors to convert pulsating DC power into smooth DC power.

[0065] In the embodiment of the present invention, the OR gate circuit can be understood as being used to implement logic control between redundant power supplies, such as Figure 2 The Oring circuit in the circuit. The Oring circuit allows multiple power supplies to supply power to the same load, but only one power supply actually provides current. When the main power supply fails, the Oring circuit will automatically select another power supply to provide power, thereby achieving power redundancy and uninterrupted power supply.

[0066] In this embodiment, a control method for a power supply system is provided. Figure 4 is a flow chart of a control method for a power supply system according to an embodiment of the present application. Figure 4 As shown, the process includes the following steps:

[0067] Step S402, using a conversion circuit to control the first DC power supply to supply power to the power supply system;

[0068] In the embodiment of the present invention, the use of a conversion circuit to control the first DC power supply to supply power to the power supply system can be understood as the conversion circuit including but not limited to an ATS (automatic switching switch) circuit, which can monitor the state of the main power supply HVDC_A line in real time. When the voltage and current of the HVDC_A line meet the power supply requirements, the conversion circuit ensures that the HVDC_A line power supply provides power to the load (such as a server, a storage device, etc.).

[0069] Step S404, in response to the first DC power supply being powered off, using a conversion circuit to control the second DC power supply to supply power to the power supply system, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

[0070] In the embodiment of the present invention, the first DC power source may be represented as a main power source HVDC_A.

[0071] The second DC power source may be represented as a backup power source HVDC_B.

[0072] In response to the first DC power supply being powered off, it can be understood that the state of the main power supply HVDC_A line is a state of power failure.

[0073] In the embodiment of the present invention, the use of a conversion circuit to control the second DC power supply to supply power to the power supply system can be understood as follows: when a fault occurs in the HVDC_A power supply (such as voltage drop, power failure or reverse polarity, etc.), the conversion circuit can quickly detect the abnormality and disconnect the HVDC_A power supply within a preset time, and switch to the backup power supply HVDC_B at the same time, so as to avoid the load being affected by the power failure and maintain the continuous operation of the system.

[0074] In the embodiment of the present invention, in the dual-channel high-voltage direct current power supply system, the conversion circuit is also responsible for managing the redundancy of the power supply, that is, when the HVDC_A power supply fails, the HVDC_B power supply can be seamlessly used as the main power supply to ensure the stability and reliability of the power supply system.

[0075] Through the control method of the power supply system provided by the present application, the power supply circuit of the power supply system includes a first DC power supply and a second DC power supply, and the first DC power supply and the second DC power supply can independently supply power to the power supply system. A conversion circuit is used to control the first DC power supply to supply power to the power supply system, and when the first DC power supply is powered off, a conversion circuit is used to control the second DC power supply to supply power to the power supply system. Therefore, the present application can solve the problem in the related art that the single-channel HVDC input cannot completely achieve safe and reliable power supply. When the input is powered off or other extreme situations occur, it will cause the PSU power supply to crash and the server to be interrupted, thereby causing communication interruption and data loss. It realizes real-time monitoring of the power supply status and automatic switching under abnormal conditions, ensuring the uninterrupted operation of key occasions such as servers or data centers, achieving significantly improved stability and reliability of the power supply, greatly reducing the system interruption time caused by power failure, and improving the continuity of key services and the security of data.

[0076] In an exemplary embodiment, before the first DC power source is powered off, the method further comprises the following execution steps:

[0077] The energy storage capacitor is pre-charged based on the first resistor.

[0078] In the embodiment of the present invention, pre-charging the energy storage capacitor based on the first resistor can be understood as that when the HVDC_A power supply is normally connected, the bulk capacitor is pre-charged by the PTC resistor.

[0079] In an exemplary embodiment, the control method of the power supply system further includes the following execution steps:

[0080] determining a voltage difference between an input voltage of the relay circuit and a voltage of the energy storage capacitor;

[0081] In response to the voltage difference being less than a preset voltage threshold, the target relay is controlled to close.

[0082] In the embodiment of the present invention, the input voltage of the relay circuit can be understood as a voltage signal for controlling the action of the relay. Exemplarily, the input voltage of the relay circuit can be expressed as Vin, which is not limited here.

[0083] The voltage of the energy storage capacitor can be understood to refer to the potential difference determined by the amount of charge stored in the capacitor when it is charged and its capacitance value. Exemplarily, the voltage of the energy storage capacitor can be expressed as Vbulk, which is not limited here.

[0084] The preset voltage threshold can be understood as a predetermined voltage value, and the system will make a specific judgment based on this voltage value. Exemplarily, the preset voltage threshold can be set to 10V, which is not limited here.

[0085] Determining the voltage difference between the input voltage of the relay circuit and the voltage of the energy storage capacitor can be understood as the system monitoring and comparing the difference between the supply voltage of the relay control circuit and the voltage across the energy storage capacitor (bulk capacitor) to determine whether the conditions for safely closing the relay are met.

[0086] In response to the voltage difference being less than the preset voltage threshold, controlling the target relay to close can be understood as, when it is monitored that the difference between the relay circuit input voltage and the energy storage capacitor voltage is lower than the threshold set by the system, the control circuit will issue an instruction to close the relay, allowing the main power supply (or the backup power supply after switching) to continue to power the system. This process is automated and is usually implemented by a power management circuit or a microcontroller to ensure that the closing action of the relay does not adversely affect the system when the power is switched or the circuit is started. Exemplarily, when the voltage difference between the input voltage and the output voltage is less than 10V, the pre-charge is considered complete. At this time, the main relay is energized, and the DC-DC circuit can start normally, which is not limited here.

[0087] In the embodiment of the present invention, when the main power supply HVDC_A is in normal power supply condition, the system will determine whether it is safe to close the main relay by monitoring the difference between the input voltage and the energy storage capacitor voltage. When the difference is less than the preset voltage threshold, the relay is closed, allowing normal DC-DC conversion and power transmission.

[0088] In an exemplary embodiment, before using the conversion circuit to control the second DC power supply to supply power to the power supply system, the method further includes the following execution steps:

[0089] In response to the first DC power source being powered off, controlling the target relay to be disconnected;

[0090] After the target relay is disconnected, the energy storage capacitor is controlled to supply power to the power supply system.

[0091] In the embodiment of the present invention, in response to the first DC power supply being powered off, controlling the target relay to be disconnected can be understood as, when the HVDC_A line loses power, the main line Relay is disconnected first.

[0092] In the embodiment of the present invention, after the target relay is disconnected, controlling the energy storage capacitor to supply power to the power supply system can be understood as that when the main relay is disconnected, the bulk capacitor supplies power to the load.

[0093] In an embodiment of the present invention, when a signal indicating that the first DC power source HVDC_A is powered off is received, the power management circuit or control logic will immediately disconnect the target relay, i.e., the main relay, to cut off the connection between the main power source and the power supply system to prevent further power loss or potential circuit damage. After the target relay is disconnected, the system will use pre-charged energy storage capacitors (such as bulk capacitors) to provide short-term power support for key circuits and components. This helps maintain the stability of the voltage in the circuit, prevents sudden voltage drops caused by power outages in the main power source, and provides buffer time for subsequent backup power switching operations.

[0094] In an exemplary embodiment, in step S404, using a conversion circuit to control the second DC power supply to supply power to the power supply system includes the following execution steps:

[0095] The conversion circuit is used to control the first DC power supply to stop working, and the conversion circuit is used to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system.

[0096] In the embodiment of the present invention, a conversion circuit is used to control the first DC power supply to stop working, and a conversion circuit is used to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system. It can be understood that when the main line Relay is disconnected, the ATS relay switches the power supply from HVDC_A to HVDC_B.

[0097] In the embodiment of the present invention, the conversion circuit first controls the disconnection with the first DC power source HVDC_A, and ensures that the first DC power source HVDC_A no longer supplies power to the power supply system by disconnecting the relay or switch device, thereby avoiding potential hazards caused by the continued power supply of the faulty power supply. After the first DC power source HVDC_A is safely disconnected, the conversion circuit quickly controls the connection between the second DC power source HVDC_B and the power supply system, and makes the backup power source a new power source for the power supply system by closing the corresponding relay or switch, thereby maintaining the voltage and current stability in the circuit and ensuring the continuous operation of the critical load.

[0098] In an exemplary embodiment, the control method of the power supply system further includes the following execution steps:

[0099] In response to the input voltage of the relay circuit lasting for a preset time period, controlling the target relay to close and driving the target transistor;

[0100] In response to the target relay being closed successfully, driving the target transistor is stopped.

[0101] In the embodiment of the present invention, the preset time period may be expressed as T2, which is not limited herein.

[0102] In response to the input voltage of the relay circuit lasting for a preset period of time, the target relay is controlled to close and the target transistor is driven. It can be understood that when the system detects that the Vin voltage lasts for T2 time, it can be considered that the HVDC_B power supply has been switched. After the HVDC_B power supply is switched on, the normal startup operation is performed to attract the main relay and drive the IGBT.

[0103] In response to the target relay being closed successfully, stopping driving the target transistor can be understood as disconnecting the IGBT drive after the main relay is normally attracted.

[0104] In an embodiment of the present invention, the system sets a time window (T2), during which the input voltage must remain stable within a preset voltage range to confirm that the power supply can supply power stably. Once the input voltage remains stable within the preset time period (T2), the power control logic will send a signal to control the target relay (usually the main relay) to close to connect the power supply and the power supply system. While the target relay is closed, the system also drives the target transistor (such as IGBT) to control the Inrush current (instantaneous high current at startup). After confirming that the target relay is closed successfully, the power control logic will stop driving the target transistor (IGBT), which means that the IGBT will be turned off, allowing normal power current to pass without being controlled by the transistor. Through the above steps, the circuit is switched from the startup / switching protection mode to the normal operating mode, ensuring efficient and stable operation of the system.

[0105] In an exemplary embodiment, the control method of the power supply system further includes the following execution steps:

[0106] In response to the second DC power supply stably supplying power to the power supply system, the energy storage capacitor is controlled to stop supplying power to the power supply system, and the energy storage capacitor is pre-charged based on the first resistor.

[0107] In an embodiment of the present invention, in response to the second DC power supply stably supplying power to the power supply system, the energy storage capacitor is controlled to stop supplying power to the power supply system, and the energy storage capacitor is pre-charged based on the first resistor. It can be understood that if the second DC power supply (i.e., the backup power supply) is successfully put into use and its voltage is stable within the preset normal working range, the power management circuit will detect this state. In response, the circuit will control the energy storage capacitor (such as a bulk capacitor) to stop supplying power to the power supply system. After ensuring that the second DC power supply is stably supplying power, the power management circuit will perform a pre-charging step, that is, use the first resistor (usually a PTC resistor, a positive temperature coefficient thermistor) to pre-charge the energy storage capacitor. The purpose of pre-charging is to gradually increase the voltage across the capacitor to be close to the power supply voltage before closing the main relay, so as to avoid a large current shock when the relay is closed.

[0108] In the embodiment of the present invention, when the HVDC_A high-voltage direct current power supply fails, the PSU will disconnect the main relay to protect the circuit, and the bulk capacitor will provide temporary power supply to the load. Once the HVDC_B backup power supply is successfully switched through the ATS (automatic switching switch) and starts to supply power stably, the PSU will detect the recovery of the input voltage, at which time the main relay will be re-applied, and the HVDC_B power supply will start to supply power to the main circuit. When the HVDC_B power supply is stable, the bulk capacitor will no longer be the main power supply, and its role will be transformed into continuing to smooth the voltage and store energy to cope with possible voltage fluctuations in the future.

[0109] In the embodiment of the present invention, under the server shelf power supply (high voltage direct current HVDC) structure, based on the hot-swap & slow-start circuit design and the N+1 redundant power supply design, dual-channel high voltage direct current input is realized, which greatly improves the system power supply safety. In the case of a power outage on the main line, the HVDC_B backup power supply can be timely cut in through ATS conversion control to ensure that the system is not disconnected. Then, through the rectification & anti-reverse circuit, the system power supply safety is further improved, and the advantages of real-time input voltage detection function, input reverse connection system safety protection function, and main and backup power supply switching without short circuit are realized.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0111] In this embodiment, a control device for a power supply system is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0112] Figure 5 is a structural block diagram of a control device 500 of a power supply system according to an embodiment of the present application, such as Figure 5 As shown, the device includes: a first control module 501, which is used to use a conversion circuit to control the first DC power supply to supply power to the power supply system; a second control module 502, which is used to control the second DC power supply to supply power to the power supply system in response to power failure of the first DC power supply, using a conversion circuit, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

[0113] In an exemplary embodiment, the second control module 502 is further configured to use a conversion circuit to control the first DC power supply to stop working, and use a conversion circuit to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system.

[0114] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0115] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0116] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0117] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0118] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0119] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0120] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0121] The embodiments of the present application also provide a computer program, which includes computer instructions, which are stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0122] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0123] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0124] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply system, characterized in that: The power supply system includes: a power supply circuit, an anti-reverse circuit, a conversion circuit, a relay circuit and an energy storage capacitor. The power supply circuit includes a first DC power supply and a second DC power supply. The first DC power supply and the second DC power supply are used to independently supply power to the power supply system. The power supply circuit is electrically connected to the anti-reverse circuit. The anti-reverse circuit is used to protect the power supply system when the power supply circuit is reversely connected. The anti-reverse circuit is electrically connected to the conversion circuit. The conversion circuit is used to control the second DC power supply to supply power to the power supply system when the first DC power supply is powered off. The conversion circuit is electrically connected to the relay circuit. The relay circuit is used to control the output current of the power supply system. The relay circuit is electrically connected to the energy storage capacitor. The energy storage capacitor is used to supply power to the power supply system when the conversion circuit performs power switching.

2. The power supply system according to claim 1, characterized in that: The anti-reverse circuit includes a first rectifier diode, a second rectifier diode, a third rectifier diode and a fourth rectifier diode, the conversion circuit includes a first conversion circuit and a second conversion circuit, the first conversion circuit is used to control the conduction state of the positive electrode of the first DC power supply and the conduction state of the positive electrode of the second DC power supply, the second conversion circuit is used to control the conduction state of the negative electrode of the first DC power supply and the conduction state of the negative electrode of the second DC power supply, the relay circuit includes a target relay, a first resistor, a second resistor and a target transistor; The positive electrode of the first DC power supply is electrically connected to the anode of the first rectifier diode, the cathode of the first rectifier diode is electrically connected to the first end of the first conversion circuit, the output end of the first conversion circuit is electrically connected to the first end of the target relay, and the second end of the target relay is electrically connected to the first end of the energy storage capacitor; The negative electrode of the first DC power supply is electrically connected to the cathode of the second rectifier diode, the anode of the second rectifier diode is electrically connected to the first end of the second conversion circuit, and the output end of the second conversion circuit is electrically connected to the second end of the energy storage capacitor; The positive electrode of the second DC power supply is electrically connected to the anode of the third rectifier diode, and the cathode of the third rectifier diode is electrically connected to the second end of the first conversion circuit; The negative electrode of the second DC power supply is electrically connected to the cathode of the fourth rectifier diode, and the anode of the fourth rectifier diode is electrically connected to the second end of the second conversion circuit.

3. The power supply system according to claim 1, characterized in that: The power supply system also includes: a control circuit and a power supply circuit, the energy storage capacitor is electrically connected to the control circuit, the control circuit is used to protect the power supply system, the control circuit is electrically connected to the power supply circuit, the power supply circuit is used to convert the input power, and the power supply circuit is electrically connected to the target connector on the server mainboard through the gold-plated layer to supply power to the server mainboard.

4. The power supply system according to claim 3, characterized in that: The power supply circuit includes a full-bridge circuit, a transformer, a rectifier and filter circuit, and an OR gate circuit. The control circuit is electrically connected to the full-bridge circuit, the full-bridge circuit is electrically connected to the transformer, the transformer is electrically connected to the rectifier and filter circuit, and the rectifier and filter circuit is electrically connected to the OR gate circuit.

5. A control method for a power supply system, characterized in that: Applied to the power supply system of any one of claims 1 to 4 above, the method comprises: Using a conversion circuit to control the first DC power supply to supply power to the power supply system; In response to the first DC power supply being powered off, the conversion circuit is used to control the second DC power supply to supply power to the power supply system, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

6. The method according to claim 5, characterized in that Before the first DC power supply is powered off, the method further includes: The energy storage capacitor is pre-charged based on the first resistor.

7. The method according to claim 6, characterized in that The method further comprises: determining a voltage difference between an input voltage of the relay circuit and a voltage of the energy storage capacitor; In response to the voltage difference being less than a preset voltage threshold, the target relay is controlled to be closed.

8. The method according to claim 7, characterized in that Before using the conversion circuit to control the second DC power supply to supply power to the power supply system, the method further includes: In response to the first DC power source being powered off, controlling the target relay to be disconnected; After the target relay is disconnected, the energy storage capacitor is controlled to supply power to the power supply system.

9. The method according to claim 8, characterized in that The using the conversion circuit to control the second DC power supply to supply power to the power supply system comprises: The conversion circuit is used to control the first DC power supply to stop working, and the conversion circuit is used to control the second DC power supply to start working, so as to control the second DC power supply to supply power to the power supply system.

10. The method according to claim 9, characterized in that The method further comprises: In response to the input voltage of the relay circuit lasting for a preset time period, controlling the target relay to close and driving the target transistor; In response to the target relay being closed successfully, driving the target transistor is stopped.

11. The method according to claim 10, characterized in that The method further comprises: In response to the second DC power supply stably supplying power to the power supply system, the energy storage capacitor is controlled to stop supplying power to the power supply system, and the energy storage capacitor is pre-charged based on the first resistor.

12. A control device for a power supply system, characterized in that: Applicable to the power supply system of any one of claims 1 to 4 above, the device comprising: A first control module, configured to control the first DC power supply to supply power to the power supply system by using a conversion circuit; The second control module is used to control the second DC power supply to supply power to the power supply system using the conversion circuit in response to the first DC power supply being powered off, wherein the first DC power supply and the second DC power supply are used to independently supply power to the power supply system.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein the computer program implements the steps of the method described in any one of claims 5 to 11 when executed by a processor.

14. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method described in any one of claims 5 to 11 are implemented.

15. A computer program product comprising a computer program, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the steps of the method as claimed in any one of claims 5 to 11.

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