High-stability dual-mode redundant DC power supply system

Abstract

The application discloses a kind of high stability dual-mode redundant DC power supply systems, including first power conversion module, second power conversion module, redundant switching control unit and DC output port;The input end of the first power conversion module and second power conversion module is respectively connected to external DC bus or AC input source, and the output end is connected to DC output port in parallel connection.The redundant switching control unit is respectively connected with two power conversion module signals, for real-time monitoring the output voltage and current state of each module, and module failure or abnormal condition is judged based on preset threshold;The application is through dual-mode redundant architecture and fast seamless switching technology, effectively avoids the power supply interruption caused by single point failure, significantly improves the operation reliability and output stability of DC power supply system, and supports online hot maintenance, and is suitable for high reliability requirement DC power supply occasion.

Description

Technical Field

[0001] This invention relates to the field of redundant DC power supply technology, specifically a highly stable dual-mode redundant DC power supply system. Background Technology

[0002] Dual-mode redundant DC power supply system is a DC power supply system that combines dual working mode switching and dual power supply redundancy backup capabilities. The core is to use two independent DC power supply modules with redundant switching control logic to ensure uninterrupted power supply when a single power supply fails, and to dynamically switch between main and backup high-efficiency mode and parallel current sharing mode according to the load. At the same time, it takes into account power supply reliability, operating efficiency and load flexibility. It is the mainstream power supply solution for scenarios with extremely high requirements for DC power supply continuity, such as industrial control, communication, power, and data centers.

[0003] The redundancy switching control is mainly executed through the redundancy control module. All functions of the redundancy control module rely on a complete link of input signal acquisition, internal logic judgment, and output switching action. The prerequisite for this link to work is that external cables must be connected to the internal circuit. Specifically, cables are connected to two independent power modules. During this process, the cables need to be inserted into the wiring terminals of the redundancy switching module to achieve electrical connection between the redundancy switching module and both power modules.

[0004] In existing redundancy switching modules, the internal wiring typically involves terminals and screws. Specifically, the cable core is installed onto the conductive terminal, and then the screw is tightened, securing the cable core to the terminal and achieving conductivity. However, in industrial applications, where there are significant day-night temperature differences, the repeated expansion and contraction of the terminal metal parts can cause the screws to gradually loosen. Furthermore, the continuous vibration from cabinet fans and production lines can also cause the screws to loosen, leading to the cable core detaching from the conductive terminal – an inevitable consequence of long-term equipment operation. This manifests as abnormally high and unstable contact resistance, resulting in voltage drops, intermittent signals, and reduced load capacity, ultimately affecting the redundancy switching control function.

[0005] In summary, to address the technical problems raised in this paper, this invention proposes a highly stable dual-mode redundant DC power supply system. Summary of the Invention

[0006] To address the issues mentioned above regarding existing redundancy switching modules used in industrial settings, where large day-night temperature differences and repeated thermal expansion and contraction of terminal metal parts cause screws to gradually loosen, as well as continuous vibrations from cabinet fans and production lines, can also lead to screws becoming loose and the wire core separating from the conductive terminal. This is an inevitable consequence of long-term equipment operation, specifically manifesting as abnormally high and unstable contact resistance, resulting in voltage drops, signal interruptions, and reduced load capacity, thus affecting the redundancy switching control function. This invention proposes a highly stable dual-mode redundant DC power supply system, comprising a first power conversion module, a second power conversion module, a redundancy switching control unit, and a DC output port.

[0007] The input terminals of the first power conversion module and the second power conversion module are respectively connected to an external DC bus or AC input source, and the output terminals of the first power conversion module and the second power conversion module are connected in parallel to the DC output port.

[0008] The redundancy switching control unit is electrically connected to the first power conversion module and the second power conversion module, respectively.

[0009] The redundancy switching control unit is a redundancy switching control module. The redundancy switching control module includes a body, which has control keys, a display terminal, and wiring terminals. The wiring terminals are located on both sides of the body and include:

[0010] There are multiple wiring slots located inside the machine body, and the wiring slots are connected to the outside through wiring holes;

[0011] The curved plate is fixed in the middle to the wall of the cable tray near the middle of the machine body, and the two ends of the curved plate curve outwards towards the outside of the machine body; the curved plate is made of elastic material.

[0012] The mounting slots are located at the end of the device away from the control keys, and the number of mounting slots is the same as the number of wiring slots. The mounting slots are connected to the wiring slots. A mounting block is slidably installed inside the mounting slot. A conductive plate is provided at one end of the mounting block inside the wiring slot. An arc-shaped protrusion is provided in the middle of the conductive plate, and the surface of the arc-shaped protrusion has a conductive layer.

[0013] As a preferred embodiment of this application, the two ends of the conductive plate are inclined, and the two ends of the conductive plate are inclined toward the direction of the arc-shaped plate.

[0014] As a preferred embodiment of this application, the curved plate has grooves at both ends, and a mounting plate is slidably connected inside the grooves. A through groove is provided in the middle of the mounting plate, and the through groove corresponds to the wire insertion groove. The mounting plate is made of conductive metal.

[0015] As a preferred embodiment of this application, a connecting piece is provided on the inner side of the arc-shaped plate, and the two ends of the connecting piece are respectively fixed to the inner walls of the two sides of the arc-shaped plate, and the connecting piece is made of elastic copper sheet.

[0016] As a preferred embodiment of this application, an elastic plate is provided on one side of the two mounting plates that are close to each other. The elastic plate is inclined and the inclination of the elastic plate faces the inside of the machine body. The elastic plate is fixed above the through groove one. A through groove two is provided on the elastic plate and the through groove two corresponds to the through groove one.

[0017] As a preferred embodiment of this application, top plates are provided on the inner sides of both ends of the arc plate. The top plates are inclined towards the inside of the machine body, and when the elastic plate is bent by force, the top plates will enter the through groove 2.

[0018] As a preferred embodiment of this application, a groove is provided through the outer side of the arc-shaped plate, and a support plate is rotatably connected inside the groove. In the initial state, the support plate is inclined, with one side of the support plate located in the groove and the other side of the support plate located outside the arc-shaped plate. When the mounting plate slides into the groove, the end of the mounting plate located in the groove presses against the end of the support plate located inside the groove, causing the support plate to rotate.

[0019] As a preferred embodiment of this application, the end of the support plate located on the outer side of the arc-shaped plate has an arc-shaped structure, and the arc-shaped area of ​​the support plate located outside the plate groove has multiple strip grooves.

[0020] The beneficial effects of this invention are as follows:

[0021] If the redundant switching module experiences external vibration, the vibration force is transmitted to the cable, causing the cable to vibrate. This vibration force is then transmitted to the arc-shaped plate near the insertion hole, and then to the wire core between the two ends of the arc-shaped plate. The wire core in this area is in a relaxed state, which, compared to a taut state, buffers the vibration force, preventing it from being transmitted to the arc-shaped plate section away from the insertion hole. This ensures that the arc-shaped plate at the end away from the insertion hole maintains a consistent fixation effect on the wire core, improving the contact between the wire core and the conductive plate. This prevents problems such as poor contact, voltage drops, and signal interruptions, thus ensuring the effectiveness of the redundant switching module. After the mounting block finishes moving, a locking device, such as a locking bolt, is used to lock the mounting block to the body. Attached Figure Description

[0022] Figure 1 This is a three-dimensional view of the organism in this invention;

[0023] Figure 2 This is a cross-sectional view of the wiring slot in this invention;

[0024] Figure 3This is a partial sectional view of the body in this invention;

[0025] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0026] Figure 5 This is a structural view of the mounting block in this invention;

[0027] Figure 6 This is a cross-sectional view of the mounting block and the arc-shaped plate in this invention;

[0028] Figure 7 yes Figure 6 A magnified view of a portion of point B in the middle;

[0029] Figure 8 This is a cross-sectional view of the mounting plate and the elastic plate in this invention;

[0030] Figure 9 This is a structural view of the mounting plate and the elastic plate in this invention;

[0031] In the diagram: 1. Body; 2. Terminal; 21. Socket slot; 211. Socket hole; 22. Arc plate; 23. Mounting slot; 231. Mounting block; 24. Conductive plate; 241. Arc protrusion; 25. Slide groove; 26. Mounting plate; 261. Through slot one; 221. Connecting piece; 262. Elastic plate; 263. Through slot two; 27. Top plate; 28. Plate groove; 281. Support plate. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] Example 1:

[0034] like Figures 1 to 9 As shown; a highly stable dual-mode redundant DC power supply system, the DC power supply system includes a first power conversion module, a second power conversion module, a redundancy switching control unit and a DC output port;

[0035] The input terminals of the first power conversion module and the second power conversion module are respectively connected to an external DC bus or AC input source, and the output terminals of the first power conversion module and the second power conversion module are connected in parallel to the DC output port.

[0036] The redundancy switching control unit is electrically connected to the first power conversion module and the second power conversion module respectively.

[0037] The redundancy switching control unit is a redundancy switching control module. The redundancy switching control module includes a body 1, which has control keys, a display terminal, and a wiring terminal 2. The wiring terminal 2 is located on both sides of the body 1. The wiring terminal 2 includes:

[0038] Multiple wire slots 21 are provided inside the body 1, and the wire slots 21 are connected to the outside through wire holes 211.

[0039] The arc-shaped plate 22 is fixed in the middle of the slot wall of the wire insertion slot 21 near the middle of the body 1, and the two ends of the arc-shaped plate 22 curve outwards from the body 1; the arc-shaped plate 22 is made of elastic material.

[0040] The mounting slot 23 is located at the end of the body 1 away from the control key, and the number of mounting slots 23 is the same as the number of wiring slots 21. The mounting slots 23 are connected to the wiring slots 21. A mounting block 231 is slidably installed inside the mounting slot 23. A conductive plate 24 is provided at one end of the mounting block 231 inside the wiring slot 21. An arc-shaped protrusion 241 is provided in the middle of the conductive plate 24, and the surface of the arc-shaped protrusion 241 has a conductive layer.

[0041] The two ends of the conductive plate 24 are inclined, and the two ends of the conductive plate 24 are inclined towards the arc plate 22.

[0042] The curved plate 22 has grooves 25 at both ends, and a mounting plate 26 is slidably connected inside the grooves 25. A through groove 261 is provided in the middle of the mounting plate 26; and the through groove 261 corresponds to the wire insertion hole 211. The mounting plate 26 is made of conductive metal.

[0043] The specific workflow is as follows;

[0044] During cable installation, the outer insulation layer of the cable is peeled off, exposing the inner core. The core is then twisted and wound together to form a single straight strand. This strand is then inserted through the insertion hole 211 into the insertion slot 21. Once inserted, the core moves into the gap between the conductive plate 24 and the arc-shaped plate 22. Because the arc-shaped plate 22 is fixed in the middle of the insertion slot 21 near the center of the body 1, and its ends are curved upwards, the installation block 231 is pushed into the installation slot after the core installation is complete. As the wire core slides into the insertion slot 21, the conductive plate 24 at the end of the mounting block 231 moves towards the arc-shaped plate 22. During this process, the conductive plate 24 squeezes the wire core. After being squeezed, the wire core moves towards both ends of the arc-shaped plate 22, making close contact with both ends of the arc-shaped plate 22. Subsequently, the mounting block 231 is continuously pushed, and the conductive plate 24 continues to squeeze the wire core and the arc-shaped plate 22. After being squeezed, the arc-shaped plate 22 bends, causing it to deform towards a straight state. When the arc-shaped plate 22 deforms, both ends of the arc-shaped plate 22 slide on the surface of the conductive plate 24, causing the arc-shaped plate 22 to... 2. The conductive plate 24 is scraped at one end facing the arc-shaped plate 22 to remove the oxide layer and impurities from the inclined area of ​​the conductive plate 24, thereby preventing the oxide layer and other impurities from affecting the conductivity between the wire core and the conductive plate 24. Furthermore, as the arc-shaped plate 22 slides on the end face of the conductive plate 24 facing the inside of the body 1, the arc-shaped plate 22 simultaneously slides on the surface of the wire core, achieving surface cleaning of the wire core and preventing impurities on the surface of the wire core from affecting the conductivity. Moreover, when the arc-shaped plate 22 is compressed, it will be elastically reset, and both ends of the arc-shaped plate 22 will continue to conduct electricity. The surface compression of plate 24 causes the two ends of arc plate 22 to continuously push the wire core, keeping the wire core tightly against the surface of conductive plate 24, thus preventing the wire core from detaching from conductive plate 24. When conductive plate 24 compresses arc plate 22, the arc-shaped protrusion 241 in the inclined area of ​​conductive plate 24 will compress the wire core located between the two ends of arc plate 22, so that the wire core of the cable will fully contact the arc surface of arc-shaped protrusion 241 in the middle of conductive plate 24, thus ensuring the contact surface between the wire core and conductive plate 24, thereby preventing the wire core from detaching from conductive plate 24, which would cause abnormally high contact resistance and instability, thus ensuring the working state of the redundant switching module.

[0045] Furthermore, by improving the conductive plate 24 and the arc-shaped plate 22, a mounting plate 26 is installed inside the slide groove 25. A spring is installed inside the slide groove 25 to reset the mounting plate 26. Based on the above, when installing the wire core, since the through slot 261 on the mounting plate 26 corresponds to the insertion hole 211, when the wire core is inserted into the insertion slot 21, the wire core will pass through the through slot 261 on the two mounting plates 26. When the mounting block 231 is pushed, the mounting block 231 pushes the conductive plate 24, and the conductive plate 24 squeezes the wire core and the arc-shaped plate 22. When the conductive plate 24 squeezes the arc-shaped plate 22, the conductive plate 24 will first squeeze the mounting plates 26 at both ends of the arc-shaped plate 22. The mounting plate 26 is squeezed and will move into the slide groove 25. During the process, the through slot 261 on the mounting plate 26 enters the slide groove 25, so that the mounting plate 26 pushes the wire core into the slide groove 25. The mounting plate 26 fixes the wire core to both ends of the arc plate 22. Since the mounting plate 26 is made of conductive material, the wire core can conduct electricity through the mounting plate 26 to the conductive plate 24. The improved conductive plate 24 differs from the above in that, during the process of the conductive plate 24 pushing the arc plate 22, the inclined ends of the conductive plate 24 will press against the ends of the arc plate 22, causing the arc plate 22 to deform. During this process, the mounting plates 26 at both ends of the arc plate 22 will be affected by the inclined ends of the conductive plate 24, causing the ends of the arc plate 22 to deform along the inclined ends of the conductive plate 24. The ends of the arc plate 22 slide towards the middle of the conductive plate 24, and the arc plate 22 no longer moves towards a straight state. During this process, the ends of the arc plate 22 slide on the surface of the conductive plate 24, allowing the arc plate 22 to clean impurities from the inclined surface of the conductive plate 24.Simultaneously, the arc-shaped plate 22 pushes the wire core. As the two ends of the arc-shaped plate 22 approach each other, they push the wire core against the surface of the conductive plate 24, causing the wire core between the two ends of the arc-shaped plate 22 to be in a relaxed state. At the same time, the arc-shaped protrusion 241, as the conductive plate 24 presses down, pushes the relaxed wire core, increasing the contact area between the wire core between the two ends of the arc-shaped plate 22 and the arc-shaped protrusion 241, thus ensuring the contact effect between the wire core and the conductive plate 24. Since the wire core between the two ends of the arc-shaped plate 22 is in a relaxed state, if the redundant switching module experiences external vibration during use in factory or other field environments, the vibration force is transmitted to the cable, causing the cable to vibrate. After the vibration reaches the arc plate 22 near the insertion hole 211, the vibration force is transmitted to the wire core between the two ends of the arc plate 22. The wire core in this area is in a relaxed state, which can buffer the vibration force compared to the taut state. This prevents the vibration force from being transmitted to the arc plate 22 at the end away from the insertion hole 211. This ensures that the arc plate 22 at the end away from the insertion hole 211 maintains a constant fixing effect on the wire core, thereby improving the contact between the wire core and the conductive plate 24 and avoiding problems such as poor contact, voltage drop, and signal interruption. This ensures the effectiveness of the redundant switching module. After the installation block 231 finishes moving, the installation block 231 is locked to the body 1 by a locking device, such as a locking bolt as in the prior art.

[0046] The system works as follows;

[0047] When the system is powered on, the input terminals of the first power conversion module and the second power conversion module are simultaneously connected to the external DC bus or AC input source. The first power conversion module and the second power conversion module then enter the standby self-test state, and sequentially complete the full-item detection of input overvoltage and undervoltage, output short circuit, module overtemperature and hardware fault. The module with abnormal self-test automatically locks the output circuit and reports the fault status code to the redundancy switching control unit. The module with normal self-test maintains the output lockout state and waits for the control unit to issue the running command.

[0048] Simultaneously, the redundant switching control unit is synchronously powered on and initialized, and its internal control logic loads preset operating parameters, specifically the mode switching current threshold, fault judgment debounce duration, parallel current sharing coefficient, fault recovery back-off delay, and protection thresholds at each level. When the cable connection is locked, the arc-shaped plate 22 inside terminal 2 slides as the conductive plate 24 is pressed down, and the arc-shaped plate 22 synchronously scrapes off the oxide layer on the conductive plate 24 and the surface of the wire core. Through this stable path, the control unit collects the input voltage, output voltage, output current, casing temperature, and fault alarms of the two power modules in real time, completing its own sampling. The system performs self-tests on the circuit and control circuit. After all self-tests pass, the system defaults to the primary / standby high-efficiency operation mode. The redundancy switching control unit sends a soft-start command to the first power conversion module. The output voltage of the first power conversion module is steadily raised to the rated value, and it independently supplies power to the DC output port, bearing all the load current of the downstream side and operating in its own optimal efficiency range. The second power conversion module maintains a hot standby state, with the input side kept energized and the internal monitoring circuit continuously running. The output side is locked and does not output power externally. It only maintains a standby state with low standby power consumption and periodically reports its own health status to the control unit.

[0049] Example 2:

[0050] like Figures 2 to 9 As shown; a connecting piece 221 is provided on the inner side of the arc plate 22. The two ends of the connecting piece 221 are respectively fixed to the inner walls of the two sides of the arc plate 22, and the connecting piece 221 is made of elastic copper sheet.

[0051] An elastic plate 262 is provided on one side of the two mounting plates 26 that are close to each other. The elastic plate 262 is inclined and the inclination of the elastic plate 262 faces the inside of the body 1. The elastic plate 262 is fixed above the through groove 1 261. A through groove 263 is provided on the elastic plate 262 and the through groove 263 corresponds to the through groove 1 261.

[0052] The specific workflow is as follows;

[0053] Based on the above embodiment 1, a connecting piece 221 is provided on the inner side of the arc-shaped plate 22. When the conductive plate 24 presses against the arc-shaped plate 22, the arc-shaped protrusion 241 in the middle of the conductive plate 24 will press against the wire core between the two ends of the arc-shaped plate 22. As the conductive plate 24 continues to press against the arc-shaped plate 22, the arc-shaped protrusion 241 will press against the wire core until the arc-shaped protrusion 241 contacts the connecting piece 221. At this time, the wire core is located behind the arc-shaped protrusion 241 and the connecting piece 221. As the arc-shaped plate 22 bends and the arc-shaped protrusion 241 presses against the connecting piece 221, the middle part of the connecting piece 221 is concave downward. This allows the connecting piece 221 to adhere to the surface of the arc-shaped protrusion 241 to a certain extent, so that the connecting piece 221 wraps the middle wire core around the surface of the arc-shaped protrusion 241, and the area of ​​the wire core not wrapped by the connecting piece 221 remains in a relaxed state. This allows the parts of the wire core located at both ends of the arc-shaped plate 22 to fully contact the conductive plate 24, and the wire core located at the connecting piece 221 to contact the conductive plate 24, while the other parts remain in a relaxed state. This improves the contact degree between the wire core and the conductive plate 24 while maintaining the vibration resistance of the wire core, thereby ensuring the conductivity continuity of the redundant switching module.

[0054] Furthermore, by setting an inclined elastic plate 262 at one end of the mounting plate 26 that is close to each other, and opening a second through groove 263 on the elastic plate 262 corresponding to the first through groove 261, when inserting the wire core, after the wire core enters the insertion groove 21, the wire core enters the first through groove 261 on the mounting plate 26, and then enters the second through groove 263, so that the wire core is located on the warp of the second through groove 263 and the first through groove 261; after the wire core is installed, the conductive plate 24 presses the two ends of the arc plate 22, and the mounting plates 26 at both ends of the arc plate 22 enter the sliding groove 25, thereby fixing the wire core at both ends of the arc plate 22 on the mounting plate 26; during the process, the elastic plate 262 moves synchronously with the mounting plate 26; then, under the guidance of the inclined surfaces at both ends of the conductive plate 24, the two ends of the arc plate 22 move together. As they approach each other, the elastic plate 262 moves towards the outside of the arc-shaped protrusion 241 until it contacts the outside of the arc-shaped protrusion 241. Then, both ends of the arc-shaped plate 22 continue to move towards the middle of the conductive plate 24, causing the mounting plate 26 to push the elastic plate 262 towards the arc-shaped protrusion 241. At this time, the edge of the elastic plate 262 has already contacted the arc-shaped protrusion 241, causing the elastic plate 262 to bend after being blocked by the arc-shaped protrusion 241. The angle between the elastic plate 262 and the mounting plate 26 becomes smaller, and at the same time, the edge of the elastic plate 262 slides on the surface of the arc-shaped protrusion 241, allowing the elastic plate 262 to scrape and clean the surface of the arc-shaped protrusion 241, thereby avoiding the accumulation of oxide layer impurities on the surface of the arc-shaped protrusion 241 after long-term use; thus ensuring the conductivity efficiency of the surface of the arc-shaped protrusion 241.

[0055] Example 3:

[0056] like Figures 1 to 9 As shown; top plates 27 are provided on the inner sides of both ends of the arc plate 22. The top plates 27 are inclined towards the inside of the body 1, and when the elastic plate 262 is bent by force, the top plates 27 will enter the through groove 263.

[0057] The specific workflow is as follows;

[0058] Based on the above embodiment, by setting a top plate 27, when the conductive plate 24 presses the two ends of the arc plate 22, the two ends of the arc plate 22 will slide on the inclined surfaces at both ends of the conductive plate 24. During this process, the elastic plate 262 rotates, and the gap between the elastic plate 262 and the mounting plate 26 becomes smaller. During the rotation of the elastic plate 262, the top plate 27 enters the second through groove 263, so that the top plate 27 pushes the wire core in the second through groove 263, so that the top plate 27 firmly pushes the wire core against the surface of the arc protrusion 241. The part of the top plate 27 that contacts the arc protrusion 241 is the part that has been scraped by the elastic plate 262 and is in a cleaned area, thereby avoiding the presence of impurities such as oxide layer at the part of the wire core that contacts the conductive plate 24, thus avoiding affecting the conductivity.

[0059] Example 4:

[0060] like Figures 1 to 9 As shown; a plate groove 28 is provided through the outer side of the arc plate 22, and a support plate 281 is rotatably connected inside the plate groove 28. In the initial state, the support plate 281 is inclined, and one side of the support plate 281 is located in the slide groove 25, while the other side of the support plate 281 is located outside the arc plate 22. When the mounting plate 26 slides into the slide groove 25, the side of the mounting plate 26 facing the inside of the machine body presses against the end of the support plate 281 located inside the slide groove 25, causing the support plate 281 to rotate.

[0061] The side of the support plate 281 located outside the plate groove 28 is made of elastic material, and the end of the support plate 281 located outside the arc plate 22 is an arc structure. Multiple strip grooves are opened in the arc area of ​​the support plate 281 located outside the plate groove 28.

[0062] The specific workflow is as follows;

[0063] Based on the above embodiments, by setting the groove 28 and the support plate 281, when the mounting plate 26 is pushed into the groove 25 by the conductive plate 24, the mounting plate 26 will first press the end of the support plate 281 located inside the groove 25. After the end of the support plate 281 located inside the groove 25 is pressed, the support plate 281 rotates inside the groove 28. At this time, the end of the support plate 281 located outside the arc plate 22 rotates and moves towards the conductive plate 24. During this process, the end of the support plate 281 located outside the arc plate 22 will push the wire core located outside the arc plate 22, so that the arc end of the support plate 281 presses the wire core onto the conductive plate 24. As the mounting plate 26 continues to move into the groove 25, the support plate 281 continues to press the wire core. At this time, the support plate 281 cannot rotate. Since the support plate 281 is made of elastic material, it will undergo elastic deformation. Specifically, the structure of the support plate 281 located outside the arc plate 22 will bend. At this time, the support plate 281 will be subjected to its own elastic force, increasing the squeezing force of the support plate 281 on the outside of the conductive plate 24. This makes the contact between the wire core and the conductive plate 24 tighter, thus preventing the wire core from separating from the conductive plate 24. At the same time, a strip groove is opened in the arc area of ​​the support plate 281. When the wire core vibrates, the arc area of ​​the support plate 281 squeezes the wire core. Through the setting of the strip groove, the friction coefficient between the wire core and the support plate 281 is increased, making it difficult for the wire core to separate from the support plate 281 and the conductive plate 24. This improves the contact stability between the wire core and the conductive plate 24, preventing the problem of poor contact caused by the conductive plate 24 separating from the wire core.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly stable dual-mode redundant DC power supply system, characterized in that, The DC power supply system includes a first power conversion module, a second power conversion module, a redundancy switching control unit, and a DC output port; The input terminals of the first power conversion module and the second power conversion module are respectively connected to an external DC bus or AC input source, and the output terminals of the first power conversion module and the second power conversion module are connected in parallel to the DC output port. The redundancy switching control unit is electrically connected to the first power conversion module and the second power conversion module, respectively. The redundancy switching control unit is a redundancy switching control module. The redundancy switching control module includes a body (1), which has control keys, a display terminal and a wiring terminal (2). The wiring terminal (2) is located on both sides of the body (1). The wiring terminal (2) includes: There are multiple wiring slots (21) inside the body (1), and the wiring slots (21) are connected to the outside through wiring holes (211); The arc plate (22) is fixed in the middle of the slot wall of the wire insertion slot (21) near the middle of the body (1), and the two ends of the arc plate (22) curve outwards towards the body (1); the arc plate (22) is made of elastic material; The mounting slot (23) is located at the end of the body (1) away from the control key, and the number of mounting slots (23) is the same as the number of wiring slots (21). The mounting slots (23) are connected to the wiring slots (21). The mounting block (231) is slidably installed inside the mounting slot (23). A conductive plate (24) is provided at one end of the mounting block (231) inside the wiring slot (21). An arc-shaped protrusion (241) is provided in the middle of the conductive plate (24), and the surface of the arc-shaped protrusion (241) has a conductive layer.

2. The high-stability dual-mode redundant DC power supply system as claimed in claim 1, characterized in that: The two ends of the conductive plate (24) are inclined, and the two ends of the conductive plate (24) are inclined towards the arc plate (22).

3. A high-stability dual-mode redundant DC power supply system as described in claim 2, characterized in that: The curved plate (22) has grooves (25) at both ends, and a mounting plate (26) is slidably connected inside the grooves (25). A through groove (261) is provided in the middle of the mounting plate (26); and the through groove (261) corresponds to the wire insertion groove (21). The mounting plate (26) is made of conductive metal.

4. A high-stability dual-mode redundant DC power supply system as described in claim 3, characterized in that: A connecting piece (221) is provided on the inner side of the arc plate (22). The two ends of the connecting piece (221) are fixed to the inner walls of the two sides of the arc plate (22), and the connecting piece (221) is made of elastic copper sheet.

5. A high-stability dual-mode redundant DC power supply system as claimed in claim 3, characterized in that: An elastic plate (262) is provided on one side of the two mounting plates (26) that are close to each other. The elastic plate (262) is inclined and the inclination of the elastic plate (262) faces the inside of the body (1). The elastic plate (262) is fixed above the through groove one (261). A through groove two (263) is provided on the elastic plate (262), and the through groove two (263) corresponds to the through groove one (261).

6. A high-stability dual-mode redundant DC power supply system as claimed in claim 5, characterized in that: The inner sides of both ends of the arc plate (22) are provided with top plates (27). The top plates (27) are inclined towards the inside of the body (1). When the elastic plate (262) is bent by force, the top plates (27) will enter the through groove (263).

7. A high-stability dual-mode redundant DC power supply system as claimed in claim 3, characterized in that: A groove (28) is provided through the outer side of the arc plate (22). A support plate (281) is rotatably connected inside the groove (28). In the initial state, the support plate (281) is inclined, and one side of the support plate (281) is located in the slide groove (25), while the other side of the support plate (281) is located outside the arc plate (22). When the mounting plate (26) slides into the slide groove (25), the mounting plate (26) presses the end of the support plate (281) located inside the slide groove (25), causing the support plate (281) to rotate.

8. A high-stability dual-mode redundant DC power supply system as claimed in claim 7, characterized in that: The support plate (281) has an arc-shaped structure at one end outside the arc plate (22), and multiple strip grooves are provided in the arc-shaped area outside the plate groove (28) of the support plate (281).

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