Uninterruptible power supply system

Abstract

The application provides an uninterrupted power supply system, and relates to power electronics technology.The uninterrupted power supply system comprises a control module, a power supply bus and a plurality of power modules; each power module is connected with the power supply bus, and the power supply bus is also connected with the control module; wherein each power module comprises a first power supply module, a second power supply module and a first conversion module; an input end of the first power supply module is used for connecting a power supply signal, a first output end of the first power supply module is connected with the power supply bus, and a second output end of the first power supply module is connected with an input end of the first conversion module; an input end of the second power supply module is connected with the power supply bus, and an output end of the second power supply module is connected with an input end of the first conversion module; and an output end of the first conversion module is connected with a power control unit of the power module.The application solves the technical problems of low control module power supply reliability and lack of fault data recording in the prior art.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and more particularly to an uninterruptible power supply system. Background Technology

[0002] In recent years, with the high-frequency and modular development of power electronics technology, modular uninterruptible power supplies (UPS) are gradually replacing traditional tower-type centralized UPS and becoming the mainstream in the market due to their advantages such as flexible expansion and convenient maintenance.

[0003] Existing modular UPS systems typically consist of multiple parallel power modules and a unified central control module. The system supports various operating modes, such as AC / DC / AC dual-conversion mode when mains power is normal, battery discharge backup mode, and hybrid power supply mode with mutual backup via the DC bus. To ensure reliable operation of the control module under different conditions, multiple power supply links are usually designed for it, such as drawing power from the auxiliary power supply of the power modules, the system DC bus, or bypass links, and using components such as diodes to achieve automatic switching.

[0004] However, existing systems often experience power supply conflicts or discontinuities when operating in different modes or when abnormalities such as fuse blowouts or auxiliary power supply failures occur. This leads to unexpected power outages and restarts of the control module, making it impossible to maintain stable operation. At the same time, it is difficult to reliably record and save fault data during the fault process, which affects fault tracing and system reliability. Utility Model Content

[0005] This application provides an uninterruptible power supply system to solve the technical problems of low power supply reliability of the control module and lack of fault data recording in existing uninterruptible power supply systems.

[0006] On one hand, this application provides an uninterruptible power supply system, including a control module, a power supply bus, and multiple power modules; each of the power modules is connected to the power supply bus, and the power supply bus is also connected to the control module;

[0007] Each of the power modules includes: a first power supply module, a second power supply module, and a first conversion module;

[0008] The input terminal of the first power supply module is used to connect to the power signal, the first output terminal of the first power supply module is connected to the power supply bus, and the second output terminal of the first power supply module is connected to the input terminal of the first conversion module.

[0009] The input terminal of the second power supply module is connected to the power supply bus, and the output terminal of the second power supply module is connected to the input terminal of the first conversion module;

[0010] The output of the first conversion module is connected to the power control unit of the power module.

[0011] In one optional embodiment, the first power supply module includes a first power supply unit and a second power supply unit; wherein...

[0012] The input terminal of the first power supply unit is used to connect to the power signal, and the output terminal of the first power supply unit is connected to the power supply bus;

[0013] The input terminal of the second power supply unit is used to connect to the power signal, and the output terminal of the second power supply unit is connected to the input terminal of the first conversion module.

[0014] In one alternative embodiment, the first power supply unit includes a first resistor, a first diode, and a first protector;

[0015] The first resistor, the first diode, and the first protector are connected in series between the power signal and the power supply bus.

[0016] The second power supply unit includes a second diode; the anode of the second diode is used to connect to the power signal, and the cathode of the second diode is connected to the input terminal of the first conversion module.

[0017] In one alternative embodiment, the second power supply module includes a second protector and a second resistor;

[0018] The second protector and the second resistor are connected in series between the power supply bus and the input terminal of the first conversion module.

[0019] In one optional embodiment, the uninterruptible power supply system further includes a bypass module and a bypass bus; wherein,

[0020] The first input terminal of the bypass module is used to connect to the power signal, and the second input terminal of the bypass module is connected to the power supply bus;

[0021] The output of the bypass module is connected to the bypass bus, and the bypass bus is also connected to the control module.

[0022] In one optional implementation, the bypass module includes a current control module and multiple bypass power supply modules;

[0023] Each of the bypass power supply modules includes a third power supply module, a fourth power supply module, and a second conversion module; wherein...

[0024] The input terminal of the third power supply module is used to connect to the power signal, the first output terminal of the third power supply module is connected to the bypass bus, and the second output terminal of the third power supply module is connected to the input terminal of the second conversion module.

[0025] The input terminal of the fourth power supply module is connected to the power supply bus, and the output terminal of the fourth power supply module is connected to the input terminal of the second conversion module.

[0026] The output of the second conversion module is connected to the bypass control unit of the bypass power supply module;

[0027] The current control module includes a third diode; the anode of the third diode is connected to the power supply bus; the cathode of the third diode is connected to the input terminal of the fourth power supply module in each of the bypass power supply modules.

[0028] In one optional embodiment, the third power supply module includes a fourth diode and a fifth diode; the fourth power supply module includes a third protector and a third resistor; the second conversion module includes a Buck chip; wherein,

[0029] The anode of the fourth diode is connected to the power signal, and the cathode of the fourth diode is connected to the bypass bus.

[0030] The anode of the fifth diode is connected to the power signal, and the cathode of the fifth diode is connected to the first input terminal of the Buck chip.

[0031] The third protector and the third resistor are connected in series between the power supply bus and the second input terminal of the Buck chip.

[0032] The output of the Buck chip is connected to the bypass control unit.

[0033] In one alternative embodiment, the uninterruptible power supply system further includes an adapter board; both the power supply bus and the bypass bus are deployed on the adapter board.

[0034] In one optional embodiment, the adapter board is further provided with a fourth resistor, a fourth protector, a fifth resistor, and a fifth protector; wherein,

[0035] The fourth resistor and the fourth protector are connected in series on the power supply bus;

[0036] The fifth resistor and the fifth protector are connected in series on the bypass bus.

[0037] In one alternative implementation, the control module includes a sixth diode and a seventh diode;

[0038] The sixth diode is connected in series between the power supply bus and the power supply input terminal of the control module;

[0039] The seventh diode is connected in series between the bypass bus and the power supply input terminal of the control module.

[0040] The uninterruptible power supply (UPS) system provided in this application incorporates a dual-power supply structure and a first conversion module within the power modules, and utilizes a power supply bus to achieve power backup between power modules. Furthermore, when a fault occurs within a power module, its power control unit can automatically obtain power from other normal power modules via the power supply bus, achieving reverse power supply. This maintains the continuous operation of the internal control unit of the faulty module during the fault period, ensuring that the power control unit does not lose power when a module malfunctions. It can continuously record and save key fault data and operating status, providing a reliable basis for subsequent failure analysis, thereby improving the system's maintainability and overall power supply reliability. Attached Figure Description

[0041] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0042] Figure 1 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 1 ;

[0043] Figure 2 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 2 ;

[0044] Figure 3 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 3 ;

[0045] Figure 4 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 4 ;

[0046] Figure 5 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 5 ;

[0047] Figure 6 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 6 ;

[0048] Figure 7 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 7 .

[0049] Explanation of reference numerals in the attached figures:

[0050] 100 - Uninterruptible Power Supply System; 1 - Power Module; 2 - Power Supply Bus; 3 - Control Module; 10 - First Power Supply Module; 20 - Second Power Supply Module; 30 - First Conversion Module; 40 - Power Control Unit; 11 - First Power Supply Unit; 12 - Second Power Supply Unit; R1 - First Resistor; D1 - First Diode; F1 - First Protector; D2 - Second Diode; R2 - Second Resistor; F2 - Second Protector; 4 - Bypass Module; 5 - Bypass Bus; 41 - Current Control Module; 42 - Bypass Power Supply Module; 421 - Third Power Supply Module; 422 - Fourth Power Supply Module; 424 - Bypass Control Unit; D3 - Third Diode; D4 - Fourth Diode; D5 - Fifth Diode; R3 - Third Resistor; F3 - Third Protector; R4 - Fourth Resistor; F4 - Fourth Protector; R5 - Fifth Resistor; F5 - Fifth Protector; D6 - Sixth Diode; D7 - Seventh Diode.

[0051] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0052] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0053] Terminology Explanation:

[0054] An uninterruptible power supply (UPS) is a power protection device that provides continuous and stable power to critical loads. It is widely used in data centers, financial trading systems, communication network base stations, and industrial control to cope with power problems such as grid interruptions and voltage fluctuations, and to ensure the uninterrupted operation of critical equipment.

[0055] As described in the background section, existing modular UPS systems typically consist of multiple parallel power modules and a unified control module. The system supports various operating modes, such as AC / DC / AC dual-conversion mode when mains power is normal, battery discharge backup mode, and hybrid power supply mode with mutual backup via the DC bus. To ensure reliable operation of the control module under different conditions, multiple power supply links are usually designed for it, such as drawing power from the auxiliary power supply of the power modules, the system DC bus, or bypass links, and using components such as diodes to achieve automatic switching.

[0056] However, existing systems still have shortcomings in actual operation. For example, when a power module's fuse blows, the auxiliary power supply fails, or the bus voltage is abnormal, the power supply link of the control module may be interrupted or conflicted, causing the control unit to lose power and restart, making it impossible to maintain stable operation. Especially when a fault occurs, the system has difficulty reliably recording fault data, which restricts the ability to trace and analyze the root cause of the fault, affecting the overall reliability and maintainability of the uninterruptible power supply system.

[0057] To address the aforementioned technical problems, this application provides an uninterruptible power supply (UPS) system. This system incorporates a dual-power supply structure and a first conversion module within the power modules, and utilizes a power supply bus to achieve power redundancy between power modules. Furthermore, when a fault occurs within a power module, its power control unit can automatically obtain power from other functioning power modules via the power supply bus, achieving reverse power supply. This ensures the continued operation of the faulty module's control unit during the fault, guaranteeing that the power control unit does not lose power when a module malfunctions. The system can continuously record and save critical fault data and operational status, providing a reliable basis for subsequent failure analysis and improving system maintainability and overall power supply reliability.

[0058] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0059] Figure 1 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 1 See also Figure 1 The uninterruptible power supply system 100 provided in this embodiment includes: multiple power modules 1, a power supply bus 2, and a control module 3; each power module 1 is connected to the power supply bus 2, and the power supply bus 2 is also connected to the control module 3; wherein, each power module 1 includes: a first power supply module 10, a second power supply module 20, and a first conversion module 30;

[0060] The input terminal of the first power supply module 10 is used to connect to the power signal, the first output terminal of the first power supply module 10 is connected to the power supply bus 2, and the second output terminal of the first power supply module 10 is connected to the first input terminal of the first conversion module 30.

[0061] The input terminal of the second power supply module 20 is connected to the power supply bus 2, and the output terminal of the second power supply module 20 is connected to the second input terminal of the first conversion module 30.

[0062] The output of the first conversion module 30 is connected to the power control unit 40 of the power module 1.

[0063] In this application, each power module 1 is used to establish an electrical connection with the power supply bus 2 through a dedicated interface. At the same time, the power supply bus 2 is also connected to the control module 3, thereby forming the power supply and communication loop of the entire system.

[0064] Based on the above circuit, a distributed power supply network can be formed to provide stable power to the control module 3, ensuring its continuous operation and realizing the overall management of the entire uninterruptible power supply system.

[0065] In some scenarios, the above-mentioned circuit can also enable the control module 3 to monitor and regulate the power supply status of each power module 1 through the power supply bus 2, thereby further improving the reliability of power supply.

[0066] In this application, each power module 1 integrates a first power supply module 10, a second power supply module 20, and a first conversion module 30.

[0067] Specifically, the input terminal of the first power supply module 10 is used to receive externally supplied power signals. When AC or DC power signals can be input normally and the power module is working normally, the first power supply module 10 can receive DC output from the power factor correction circuit or external DC power, thereby providing power to the subsequent circuits.

[0068] For example, the output of the power factor correction circuit or the voltage supplied by an external DC power supply may be 24V.

[0069] Based on this, the first power supply module 10 is provided with two independent output terminals: the first output terminal is directly connected to the power supply bus 2, so that the electrical energy received by the first power supply module 10 can be transmitted to the power supply bus through this branch to provide power support for the control module of the system; the second output terminal is connected to the first input terminal of the first conversion module 30, so as to lead another path of electrical energy into the module, which is dedicated to powering the internal circuit of the power module 1.

[0070] The input terminal of the second power supply module 20 is connected to the power supply bus 2, and its output terminal is connected to the second input terminal of the first conversion module 30, so that the power module 1 can obtain electrical energy from the power supply bus 2 provided by other power modules or the system common power supply.

[0071] After selecting or switching between the two input power sources, the first conversion module 30 supplies power to the power control unit 40 inside the power module 1 from its output terminal. For example, when the first power supply module 10 is working normally, the first conversion module 30 prioritizes its output power; when the first power supply module 10 malfunctions or has an abnormal output, it can automatically switch to the input channel of the second power supply module 20, ensuring that the first conversion module 30 can provide a stable and continuous power supply to the power control unit 40 under various operating conditions.

[0072] Furthermore, when the first power supply module 10 in a certain power module 1 fails to output normally due to faults such as fuse blowout or auxiliary power supply damage, its power control unit 40 can automatically obtain backup power from the power supply bus 2 through the second power supply module 20 to maintain normal operation. It can also record system parameters and event logs at the time of the fault, providing data support for subsequent fault diagnosis and analysis, and improving the reliability and maintainability of the system.

[0073] In the above scheme, a dual-power supply structure and a first conversion module 30 are set in the power module 1, and power supply backup between power modules is realized by using the power supply bus. Furthermore, when a fault occurs within a power module, its power control unit 40 can automatically obtain power from other normal power modules 1 through the power supply bus 2 to achieve reverse power supply, thereby maintaining the continuous operation of the internal faulty module control unit during the fault period. This ensures that the power control unit 40 does not lose power when the module malfunctions, and can continuously record and save key fault data and operating status, providing a reliable basis for subsequent failure analysis, thus improving the maintainability and overall power supply reliability of the system.

[0074] The following description provides an example of the specific structures that each functional module in the uninterruptible power supply system 100 may have, but it is not intended to limit this application.

[0075] Figure 2 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 2 See also Figure 2 Based on the above implementation method, this implementation method further refines the first power supply module 10 in the power module 1.

[0076] Specifically, the first power supply module 10 includes a first power supply unit 11 and a second power supply unit 12; wherein, the input terminal of the first power supply unit 11 is used to connect to a power signal, and the output terminal of the first power supply unit 11 is connected to the power supply bus 2;

[0077] The input terminal of the second power supply unit 12 is used to connect to the power signal, and the output terminal of the second power supply unit 12 is connected to the input terminal of the first conversion module 30.

[0078] In this application, when the AC or DC power signal can be input normally and the power module is working normally, the first power supply unit 11 can receive the DC output from the power factor correction circuit or the external DC source, and transmit the power to the power supply bus 2 through the output terminal, thereby delivering power to the system control module 3 through the power supply bus 2.

[0079] At the same time, the second power supply unit 12 also obtains power from the power supply bus 2 in reverse, so as to provide a backup power input for the power control unit 40 inside the power module 1.

[0080] In the above embodiments, by splitting the first power supply module 10 into a first power supply unit 11 and a second power supply unit 12, the power supply to the power supply bus 2 and the power supply to the internal power control unit 40 of the module can be isolated and managed independently, improving the reliability and flexibility of the power supply. Based on this, even if the second power supply unit 12 fails, the first power supply unit 11 can still supply power to the power supply bus 2 normally, maintaining the normal operation of the system-level power supply network; conversely, if the first power supply unit 11 is abnormal, the second power supply unit 12 can also ensure the basic power needs of the control unit of this module, and together with the backup power obtained by the second power supply module 20 from the bus, jointly ensure that the power control unit 40 can operate stably under different fault scenarios and record key fault information, thereby enhancing the fault tolerance and maintainability of the system.

[0081] Figure 3 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 3 See also Figure 3 Based on the above implementation, this implementation further refines the specific circuit structure of the first power supply unit 11 and the second power supply unit 12 in the first power supply module 10.

[0082] Specifically, the first power supply unit 11 includes a first resistor R1, a first diode D1, and a first protector F1;

[0083] The first resistor R1, the first diode D1, and the first protector F1 are connected in series between the power signal and the power supply bus 2.

[0084] The second power supply unit 12 includes a second diode D2; the anode of the second diode D2 is used to connect to the power signal, and the cathode of the second diode D2 is connected to the input terminal of the first conversion module 30.

[0085] In this application, a power supply path with current limiting, unidirectional conduction, and overcurrent protection functions is formed by connecting the first resistor R1, the first diode D1, and the first protector F1 in series between the power signal input terminal and the power supply bus 2. This allows the power signal to be safely transmitted to the power supply bus 2, which in turn supplies power to the system's control module 3.

[0086] Furthermore, by connecting the anode of the second diode D2 to the aforementioned power signal and the cathode to the first input terminal of the first conversion module 30, an independent direct power supply path is formed. This enables the power signal to be transmitted to the first conversion module 30 by utilizing the unidirectional conductivity of the diode, thereby powering the internal circuit of this power module 1.

[0087] Through the above implementation, the first power supply module 10 can achieve physical isolation and independent management of the power supply to the power supply bus 2 and the internal power supply of the power module 1. For example, the devices in the first power supply unit 11 implement functions such as resistor current limiting, diode reverse protection, and overcurrent protection by the protector, ensuring the safety and stability of the system power supply bus; and the diode isolation provided in the second power supply unit 12 can ensure the reliability of the power supply inside the module, so that when a single path fails, the other path can still maintain power supply, further improving the fault tolerance and uninterrupted operation reliability of the system.

[0088] See also Figure 3 Based on the above implementation method, this implementation method further refines the specific circuit structure in the second power supply module 20.

[0089] Specifically, the second power supply module 20 has a second protector F2 and a second resistor R2; the second protector F2 and the second resistor R2 are connected in series between the power supply bus and the input terminal of the first conversion module 30.

[0090] In this application, by connecting the second protector F2 and the second resistor R2 in series between the power signal input terminal and the input terminal of the first conversion module 30, a backup power supply path is formed to draw power from the power supply bus 2. This backup power supply path can obtain power from other normally powered power modules 1 in the system through the power supply bus 2 when the first power supply module 10 inside the power module 1 fails or the input power is abnormal.

[0091] It should also be noted that the second protector F2, such as a fuse or resettable fuse, provides overcurrent protection to prevent fault current from damaging the downstream circuitry; the second resistor R2 limits the current, ensuring that the current input to the first conversion module 30 is within a safe range. Through these structural characteristics, the second power supply module 20 can safely and reliably provide backup power input to the first conversion module 30, forming power redundancy with the first power supply module 10. Together, they ensure that the power control unit 40 receives continuous and stable power supply under different fault scenarios, thereby ensuring its continuous operation and complete recording of fault data, thus improving the system's power supply reliability and fault tracing capabilities.

[0092] See also Figure 3 Based on the above implementation method, this implementation method further refines the specific circuit structure in the first conversion module 30.

[0093] Specifically, the first conversion module 30 may include a buck switching regulator, such as a BUCK chip.

[0094] In this application, the input terminal of the BUCK chip is connected to the second output terminal of the first power supply module 10 and the output terminal of the second power supply module 20, respectively. This enables the chip to receive input voltages from two independent power supply paths and convert the input voltages into the operating voltage required by the power control unit 40, such as ±15V. The operating voltage is then transmitted to the power input terminal of the power control unit 40 through the output terminal of the BUCK chip. This ensures that the power control unit 40 can obtain a stable and efficient power supply in both normal power supply mode and standby power supply mode, thereby guaranteeing its continuous and stable operation and reliable recording of fault data, further improving the overall reliability of the system.

[0095] Based on the above embodiments, this implementation further optimizes the redundancy design of the uninterruptible power supply system. By adding a bypass module and a bypass bus, a more complete power supply guarantee mechanism is constructed, improving the reliability of the system under complex operating conditions.

[0096] Figure 4 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 4 See also Figure 4 Based on the above embodiments, the uninterruptible power supply system provided in this embodiment further includes: the uninterruptible power supply system 100 further includes a bypass module 4 and a bypass bus 5; wherein, the first input terminal of the bypass module 4 is used to connect to the power signal, the second input terminal of the bypass module 4 is connected to the power supply bus 2; the output terminal of the bypass module 4 is connected to the bypass bus 5, and the bypass bus 5 is also connected to the control module 3.

[0097] Specifically, the first input terminal of the bypass module 4 can be directly connected to an external power supply signal, such as the DC output from the power factor correction circuit, to serve as the main power source for the bypass function, thereby providing power to the bypass bus 5 and the internal circuitry of the bypass module. In addition, the second input terminal of the bypass module 4 is connected to the power supply bus 2 to supply power to the internal circuitry of the bypass module 4, and does not participate in the main power supply output of the bypass module.

[0098] Based on the above, when the external power supply signal is working normally and the bypass module is working normally, the externally input power signal is transmitted to the bypass bus 5 through the bypass module 4, and then the power is transmitted to the control module 3 through the bypass bus 5, so as to achieve power supply reliability.

[0099] In addition, when the bypass module 4 fails to output normally due to faults such as fuse blowout or auxiliary power supply failure, its internal bypass control unit can automatically obtain backup power from the power supply bus 2 to maintain normal operation. It can also record system parameters and event logs at the time of the fault, providing data support for subsequent fault diagnosis and analysis. This solves the problem that the bypass module itself cannot record fault data when it is abnormal, making the cause of the bypass module's fault traceable and further improving the system's maintenance efficiency and reliability.

[0100] See also Figure 4 Based on the above implementation method, this implementation method further refines the specific circuit structure of the bypass module 4.

[0101] Specifically, the bypass module 4 includes a current control module 41 and multiple bypass power supply modules 42; each bypass power supply module 42 includes a third power supply module 421, a fourth power supply module 422, and a second conversion module 423; wherein, the input terminal of the third power supply module 421 is used to connect to the power signal, the first output terminal of the third power supply module 421 is connected to the bypass bus 5; the second output terminal of the third power supply module 421 is connected to the input terminal of the second conversion module 423; the input terminal of the fourth power supply module 422 is connected to the power supply bus 2, the output terminal of the fourth power supply module 422 is connected to the input terminal of the second conversion module 423; the output terminal of the second conversion module 423 is connected to the bypass control unit 424 of the bypass power supply module 42; the current control module 41 includes a third diode D3; the anode of the third diode D3 is connected to the power supply bus 2; the cathode of the third diode D3 is connected to the input terminal of the fourth power supply module 422 in each bypass power supply module 42.

[0102] In this application, the current control module 41 can be used as a connection unit connecting the power supply bus 2 and each bypass power supply module 42. Optionally, the current control module may include a third diode D3, and the anode of the third diode D3 is connected to the power supply bus 2, and the cathode is connected to the input terminal of the fourth power supply module 422 in each bypass power supply module 42. Through the unidirectional conductivity characteristic of the diode, the unidirectional transmission of power from the power supply bus 2 to the bypass power supply module 42 is realized, preventing the current from flowing back into the power supply bus from the bypass side, thereby ensuring the electrical safety and operational stability of the system power supply network.

[0103] Based on this, each bypass power supply module 42 adopts a modular design, internally integrating a third power supply module 421, a fourth power supply module 422, and a second conversion module 423.

[0104] Specifically, the input terminal of the third power supply module 421 is used to access an external power signal and has two outputs: the first output terminal is connected to the bypass bus 5 and can inject power into the bypass bus; the second output terminal is connected to the input terminal of the second conversion module 423 and can provide power to the internal circuit of this bypass power supply module.

[0105] The input terminal of the fourth power supply module 422 is connected to the power supply bus 2 through the current control module 41, and can obtain power from the power supply bus. Its output terminal is also connected to the input terminal of the second conversion module 423, forming a power supply path parallel to the third power supply module 421.

[0106] The output of the second conversion module 423 is directly connected to the bypass control unit 424 of this bypass power supply module 42. It can process and convert the input power from the third power supply module 421 and the fourth power supply module 422 to provide a stable operating voltage for the bypass control unit 424.

[0107] Based on this, it should be noted that the specific implementation methods of the third power supply module 421, the fourth power supply module 422, and the second conversion module 423 are consistent with the implementation methods of the first power supply module 10, the second power supply module 20, and the first conversion module 30 in the power module 1, and will not be repeated here.

[0108] In the above structure, each bypass power supply module 42 can either directly draw power from an external source via the third power supply module 421 or obtain power from the system power supply bus 2 via the fourth power supply module 422. The power is then converted and regulated by the second conversion module 423, ensuring a stable and reliable power supply for the bypass control unit 424 under different operating conditions. Simultaneously, the current control module 41, through unidirectional conductivity, achieves electrical isolation between the main power supply network and the bypass power supply bus, preventing current reversal or mutual interference. This enhances the redundancy and operational independence of the bypass power supply bus, further improving the overall reliability and fault response capability of the system.

[0109] Figure 5 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 5 See also Figure 5 Based on the above implementation method, the specific circuit structure of the bypass power supply module 42 has been refined.

[0110] Specifically, the third power supply module 421 includes a fourth diode D4 and a fifth diode D5; the fourth power supply module 422 includes a third protector F3 and a third resistor R3; the second conversion module 423 includes a Buck chip; wherein, the anode of the fourth diode D4 is connected to the power signal, and the cathode of the fourth diode D4 is connected to the bypass bus 5; the anode of the fifth diode D5 is connected to the power signal, and the cathode of the fifth diode D5 is connected to the first input terminal of the Buck chip; the third protector F3 and the third resistor R3 are connected in series between the power supply bus 2 and the second input terminal of the Buck chip; the output terminal of the Buck chip is connected to the bypass control unit 424.

[0111] In this application, the third power supply module 421 includes a fourth diode D4 and a fifth diode D5, both of which rely on unidirectional conductivity to achieve directional power transmission and circuit isolation.

[0112] Specifically, the anode of the fourth diode D4 is used to receive external power signals, such as the DC output signal of a power factor correction circuit, while the cathode is directly connected to the bypass bus 5. Thus, when an external power signal is input normally, electrical energy can be unidirectionally transmitted to the bypass bus 5 through the fourth diode D4, supplementing the bypass power supply network where the bypass bus 5 is located. Simultaneously, the fourth diode D4 effectively prevents current from flowing back from the bypass bus 5 side to the external power source, ensuring power isolation between the external power source and the bypass bus 5 and preventing mutual interference.

[0113] Based on this, it should be noted that the specific circuit structure and implementation principle of the fourth power supply module 422 and the second conversion module 423 are consistent with the implementation methods of the second power supply module 20 and the first conversion module 30 in the power module 1, and have the same beneficial effects, so they will not be repeated here.

[0114] Figure 6 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 6 See also Figure 6 Based on the above implementation, the uninterruptible power supply system provided in this embodiment also includes an adapter board; both the power supply bus and the bypass bus are deployed on the adapter board.

[0115] Specifically, the adapter board 6 can be a multilayer printed circuit board with a power supply bus 2 routing layer and a bypass bus 5 routing layer, so that both the power supply bus 2 and the bypass bus 5 are integrated and deployed on the adapter board 6 in the form of printed circuits. In addition, electrical connections can be made with the corresponding terminals of the power module 1, the bypass module 4 and the control module 3 through inter-board vias (not shown in the figure) and connectors (not shown in the figure), respectively.

[0116] By using an adapter board to integrate the bus deployment, the number and complexity of internal cable connections can be reduced, thereby reducing the risk of poor contact due to loose connectors or cable wear and improving the reliability of power supply to the control module.

[0117] See also Figure 6 Based on the above implementation, the adapter board provided in this embodiment is further provided with a fourth resistor R4, a fourth protector F4, a fifth resistor R5, and a fifth protector F5; wherein, the fourth resistor R4 and the fourth protector F4 are connected in series on the power supply bus 2; and the fifth resistor R5 and the fifth protector F5 are connected in series on the bypass bus 5.

[0118] Specifically, the fourth protector F4 and the fifth protector F5 can be fuses or resettable fuses, which are used to provide overcurrent protection for the power supply bus 2 and the bypass bus 5, respectively; the fourth resistor R4 and the fifth resistor R5 are current-limiting resistors, which are used to suppress the inrush current on the corresponding buses.

[0119] The above implementation method achieves onboard and centralized management of bus protection by directly integrating the protection element into the circuitry of the adapter board 6.

[0120] Figure 7 A schematic diagram of the structure of an uninterruptible power supply system provided in this application embodiment. Figure 7 See also Figure 7Based on the above implementation, in the uninterruptible power supply system provided in this embodiment, the control module 3 includes a sixth diode D6 and a seventh diode D7; the sixth diode D6 is connected in series between the power supply bus 2 and the power supply input terminal of the control module 3; the seventh diode D7 is connected in series between the bypass bus 5 and the power supply input terminal of the control module 3.

[0121] Specifically, the anode of the sixth diode D6 is connected to the power supply bus 2, and the cathode is connected to the power supply input terminal of the control module 3; the anode of the seventh diode D7 is connected to the bypass bus 5, and the cathode is connected to the power supply input terminal of the control module 3.

[0122] By utilizing the unidirectional conductivity of diodes, power supply bus 2 and bypass bus 5 can jointly supply power to control module 3, while avoiding current crosstalk between the two buses, forming an "OR" logic power supply relationship. When both buses are normally powered, the bus with the higher voltage will give priority to supplying power to control module 3.

[0123] Through the above implementation method, a dual diode isolation circuit is set at the power supply input of the control module 3 to realize electrical isolation and intelligent selection between the power supply bus and the bypass bus, prevent mutual interference and circulating current problems between different power paths, ensure that the control module can automatically select the optimal power supply source, improve the reliability of the power supply of the control module and the power switching capability of the system under different operating conditions.

[0124] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0125] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An uninterruptible power supply system, characterized by comprising: Includes a control module, a power supply bus, and multiple power modules; Each of the power modules is connected to the power supply bus, and the power supply bus is also connected to the control module; Each of the power modules includes: a first power supply module, a second power supply module, and a first conversion module; The input terminal of the first power supply module is used to connect to the power signal, the first output terminal of the first power supply module is connected to the power supply bus, and the second output terminal of the first power supply module is connected to the input terminal of the first conversion module. The input terminal of the second power supply module is connected to the power supply bus, and the output terminal of the second power supply module is connected to the input terminal of the first conversion module; The output of the first conversion module is connected to the power control unit of the power module.

2. The uninterruptible power supply system of claim 1, wherein, The first power supply module includes a first power supply unit and a second power supply unit; wherein, The input terminal of the first power supply unit is used to connect to the power signal, and the output terminal of the first power supply unit is connected to the power supply bus; The input terminal of the second power supply unit is used to connect to the power signal, and the output terminal of the second power supply unit is connected to the input terminal of the first conversion module.

3. The uninterruptible power supply system of claim 2, wherein, The first power supply unit includes a first resistor, a first diode, and a first protector; The first resistor, the first diode, and the first protector are connected in series between the power signal and the power supply bus. The second power supply unit includes a second diode; the anode of the second diode is used to connect to the power signal, and the cathode of the second diode is connected to the input terminal of the first conversion module.

4. The uninterruptible power supply system of claim 1, wherein, The second power supply module includes a second protector and a second resistor; The second protector and the second resistor are connected in series between the power supply bus and the input terminal of the first conversion module.

5. The uninterruptible power supply system of any of claims 1-4, wherein, The uninterruptible power supply system also includes a bypass module and a bypass bus; wherein... The first input terminal of the bypass module is used to connect to the power signal, and the second input terminal of the bypass module is connected to the power supply bus; The output of the bypass module is connected to the bypass bus, and the bypass bus is also connected to the control module.

6. The uninterruptible power supply system according to claim 5, characterized in that, The bypass module includes a current control module and multiple bypass power supply modules; Each of the bypass power supply modules includes a third power supply module, a fourth power supply module, and a second conversion module; wherein... The input terminal of the third power supply module is used to connect to the power signal, the first output terminal of the third power supply module is connected to the bypass bus, and the second output terminal of the third power supply module is connected to the input terminal of the second conversion module. The input terminal of the fourth power supply module is connected to the power supply bus, and the output terminal of the fourth power supply module is connected to the input terminal of the second conversion module. The output of the second conversion module is connected to the bypass control unit of the bypass power supply module; The current control module includes a third diode; the anode of the third diode is connected to the power supply bus; the cathode of the third diode is connected to the input terminal of the fourth power supply module in each of the bypass power supply modules.

7. The uninterruptible power supply system according to claim 6, characterized in that, The third power supply module includes a fourth diode and a fifth diode; the fourth power supply module includes a third protector and a third resistor; the second conversion module includes a Buck chip; wherein... The anode of the fourth diode is connected to the power signal, and the cathode of the fourth diode is connected to the bypass bus. The anode of the fifth diode is connected to the power signal, and the cathode of the fifth diode is connected to the first input terminal of the Buck chip. The third protector and the third resistor are connected in series between the power supply bus and the second input terminal of the Buck chip. The output of the Buck chip is connected to the bypass control unit.

8. The uninterruptible power supply system according to any one of claims 1-4, characterized in that, The uninterruptible power supply system also includes an adapter board; both the power supply bus and the bypass bus are deployed on the adapter board.

9. The uninterruptible power supply system according to claim 8, characterized in that, The adapter board is also equipped with a fourth resistor, a fourth protector, a fifth resistor, and a fifth protector; wherein, The fourth resistor and the fourth protector are connected in series on the power supply bus; The fifth resistor and the fifth protector are connected in series on the bypass bus.

10. The uninterruptible power supply system according to any one of claims 1-4, characterized in that, The control module includes a sixth diode and a seventh diode; The sixth diode is connected in series between the power supply bus and the power supply input terminal of the control module; The seventh diode is connected in series between the bypass bus and the power input terminal of the control module.

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