Industrial computer power supply, industrial computer and vehicle

Abstract

The application provides an industrial computer power supply, an industrial computer and a vehicle, and relates to the technical field of power supplies.The industrial computer power supply comprises an input interface circuit, a first energy storage capacitor, a power supply conversion circuit and an output interface circuit.The input interface circuit is used for connecting an external power supply.The first energy storage capacitor is electrically connected with the input interface circuit, and is used for storing electric energy to maintain the electric energy when the input interface circuit is disconnected from the external power supply for a short time.The power supply input end of the power supply conversion circuit is electrically connected with the input interface circuit.The output interface circuit is electrically connected with the power supply output end of the power supply conversion circuit.The application can prevent the system from restarting or data from being lost due to instantaneous power failure of the industrial computer, and improves the reliability of the power supply connection and the stability of the equipment operation.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to an industrial control computer power supply, an industrial control computer, and a vehicle. Background Technology

[0002] Existing industrial PC power supplies, when used in vehicles such as subways and high-speed trains, often experience brief (e.g., 200ms) loosening of the interface due to the vibrations during vehicle operation. High-precision equipment like industrial PCs cannot withstand such short-term power outages. These momentary power interruptions can lead to system restarts or data loss, severely impacting the stable operation of the equipment. The reliability of power connections is particularly critical in applications with frequent vibrations, such as rail transportation. Traditional solutions typically employ mechanical reinforcement or redundant power supply designs, but these methods either fail to completely eliminate momentary power outages or significantly increase system cost and size. Utility Model Content

[0003] The main purpose of this utility model is to provide an industrial control computer power supply, which aims to prevent the industrial control computer from restarting or losing data due to instantaneous power failure, thereby improving the reliability of power connection and the stability of equipment operation.

[0004] To achieve the above objectives, this utility model provides an industrial control computer power supply, the industrial control computer power supply comprising: An input interface circuit, wherein the input interface circuit is used to connect to an external power source; A first energy storage capacitor is electrically connected to the input interface circuit. The first energy storage capacitor is used to store electrical energy to maintain the electrical energy when the input interface circuit is briefly disconnected from the external power supply. A power conversion circuit, wherein the power input terminal of the power conversion circuit is electrically connected to the input interface circuit; An output interface circuit is provided, which is electrically connected to the power output terminal of the power conversion circuit.

[0005] Optionally, the power conversion circuit includes: A DC-DC power chip has a first input terminal connected to the first terminal of the input interface circuit, a first input terminal connected to the positive terminal of the first energy storage capacitor, a second input terminal connected to the second terminal of the input interface circuit, a second input terminal connected to the negative terminal of the first energy storage capacitor, a first output terminal connected to the first terminal of the output interface circuit, a second output terminal connected to the second terminal of the output interface circuit, and a first capacitor connected in parallel between the switching terminal and the negative input terminal of the DC-DC power chip.

[0006] Optionally, the industrial computer power supply further includes: The second energy storage capacitor has its positive terminal connected to the first output terminal of the DC-DC power chip, and its negative terminal connected to the second output terminal of the DC-DC power chip.

[0007] Optionally, the industrial computer power supply further includes: A first filter circuit is connected in parallel across the two ends of the input interface circuit. The first filter circuit is used to filter out electromagnetic interference in the input power supply.

[0008] Optionally, the industrial computer power supply further includes: The second filter circuit has a first terminal connected to the first terminal of the output interface circuit and a second terminal connected to the second terminal of the output interface circuit. The second filter circuit is used to smooth the output power.

[0009] Optionally, the input interface circuit includes multiple aviation connectors, and the output interface circuit includes multiple aviation connectors.

[0010] Optionally, the industrial computer power supply further includes: A ring-shaped shielding circuit is connected to the ground of the output interface circuit. The ring-shaped shielding circuit is used to reduce electromagnetic interference of the output power supply.

[0011] Optionally, the ring-shaped shielding circuit includes: A shielding ring is connected to the ground of the output interface circuit. The shielding ring is used to form an electromagnetic shielding layer when the output interface circuit outputs power.

[0012] In addition, to achieve the above objectives, this utility model also provides an industrial control computer, which includes the industrial control computer power supply as described above.

[0013] In addition, to achieve the above objectives, this utility model also provides a vehicle, including the industrial control computer as described above.

[0014] This embodiment of the invention includes an input interface circuit, a first energy storage capacitor, a power conversion circuit, and an output interface circuit. First, the input interface circuit is used to connect to an external power source. Then, the first energy storage capacitor is electrically connected to the input interface circuit. The first energy storage capacitor stores electrical energy to maintain power when the input interface circuit is briefly disconnected from the external power source. Next, the power input terminal of the power conversion circuit is electrically connected to the input interface circuit. Finally, the output interface circuit is electrically connected to the power output terminal of the power conversion circuit. This design prevents the industrial control computer from restarting or losing data due to momentary power outages, improving the reliability of the power connection and the stability of equipment operation. Attached Figure Description

[0015] 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.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the power supply structure of an industrial control computer according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention; Figure 3 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention; Figure 4 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention; Figure 5 This is a schematic diagram of an industrial control computer power supply structure according to another embodiment of the present invention; Figure 6 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention; Figure 7 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention; Figure 8 This is a schematic diagram of the power supply structure of an industrial control computer according to another embodiment of the present invention.

[0018] Explanation of icon numbers: 10. Input interface circuit; 20. First energy storage circuit; 30. Power conversion circuit; 40. Output interface circuit; 50. Second energy storage circuit; 60. First filter circuit; 70. Second filter circuit; 80. Ring shielding circuit.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Well-known modules, units, and their connections, links, communications, or operations are not shown or described in detail. Furthermore, the described features, architectures, or functions can be combined in any way in one or more embodiments. Those skilled in the art should understand that the various embodiments described below are only for illustrative purposes and are not intended to limit the scope of protection of the present invention.

[0021] When existing industrial PC power supplies are used in vehicles such as subways and high-speed trains, the interfaces often experience brief (e.g., 200ms) loosening due to the vibrations during vehicle operation. High-precision equipment like industrial PCs cannot withstand such short-term power outages. These momentary power failures can cause the industrial PC system to restart or lose data, severely impacting the stable operation of the equipment. The reliability of power connections is particularly critical in applications with frequent vibrations, such as rail transportation. Traditional solutions typically employ mechanical reinforcement or redundant power supply designs, but these methods either cannot completely prevent momentary power failures or significantly increase system cost and size.

[0022] The main solution of this application embodiment is as follows: by providing an input interface circuit, a first energy storage capacitor, a power conversion circuit, and an output interface circuit, the input interface circuit is first used to connect to an external power source, and then the first energy storage capacitor is electrically connected to the input interface circuit. The first energy storage capacitor is used to store electrical energy to maintain electrical energy when the input interface circuit is briefly disconnected from the external power source. Then, the power input terminal of the power conversion circuit is electrically connected to the input interface circuit, and finally, the output interface circuit is electrically connected to the power output terminal of the power conversion circuit.

[0023] This application provides a solution that can prevent industrial control computers from restarting or losing data due to momentary power outages, thereby improving the reliability of power connections and the stability of equipment operation.

[0024] When traditional industrial control computer power supplies are used in rail transit vehicles, the power interface is prone to poor contact under mechanical vibration, leading to momentary interruptions in the input voltage. Precision equipment such as industrial control computers have strict requirements for power supply continuity. Transient voltage drops will trigger the system protection mechanism, causing unplanned equipment shutdowns or data loss, directly affecting the real-time response capability and operational stability of the control system.

[0025] For example, in the traction power supply system of a subway vehicle, the industrial control computer needs to continuously process train positioning signals and braking control commands. When the vehicle passes through track joints or turnout areas, the vehicle body generates a complex vibration of 6-200Hz, causing micron-level displacement between the power interface pins and sockets. At this time, a sudden change in input circuit impedance causes a voltage drop, the duration of which reaches the reset threshold of the control system's watchdog circuit, resulting in an abnormal reset of the control logic unit.

[0026] If the above problems are not addressed, frequent power outages will cause control command transmission delays to exceed the fault tolerance range of the train's automatic protection system, potentially leading to false triggering of emergency braking or signal loss. In the onboard network architecture, the collaborative operation of multiple nodes relies on precise clock synchronization; timing deviations caused by transient voltage interruptions will disrupt the timing logic of communication protocols, and in severe cases, cause the entire train control network to enter a safety protection state. Furthermore, voltage spikes generated by transient power outages may couple to sensitive measurement circuits through common ground loops, exacerbating electromagnetic compatibility issues in the signal acquisition system.

[0027] To address the aforementioned issues, this application first analyzes the mechanism of poor power interface contact under vibration conditions, finding that traditional mechanical solutions for reinforcing the interface cannot eliminate the instantaneous impedance surges caused by micron-level displacement. Attempts to use a redundant power supply parallel scheme revealed that its size and cost were insufficient to meet the installation requirements of vehicle-mounted equipment. Further research into the relationship between voltage drop duration and device reset threshold showed that a power sustaining capability on the order of 200ms could cover the transient interruption period under typical vibration scenarios. Ultimately, an energy storage capacitor was chosen on the input side as an energy buffer unit, with the capacitor value matching the characteristics of a low-power load while avoiding the size and surge current issues associated with large-capacity capacitors.

[0028] Reference Figure 1 In one embodiment of this utility model, the industrial control computer power supply includes an input interface circuit 10, a first energy storage capacitor 20, a power conversion circuit 30, and an output interface circuit 40, wherein: The input interface circuit 10 is used to connect to an external power source; the first energy storage capacitor 20 is electrically connected to the input interface circuit 10, and the first energy storage capacitor 20 is used to store electrical energy to maintain electrical energy when the input interface circuit 10 is briefly disconnected from the external power source; (220μF / 200V, low power, short-term energy storage) The power input terminal of the power conversion circuit 30 is electrically connected to the input interface circuit 10; the output interface circuit 40 is electrically connected to the power output terminal of the power conversion circuit 30.

[0029] The input interface circuit 10 refers to the circuit structure used to connect to an external power source. It can be implemented using an aviation plug or an industrial connector, and its function is to provide a stable external power input to the industrial control computer. The first energy storage capacitor 20 is a capacitor directly connected to the input interface circuit 10. It can be implemented using an electrolytic capacitor or a film capacitor, and its function is to release stored electrical energy when the external power supply is briefly disconnected, maintaining the continuous operation of the power system. The power conversion circuit 30 is a circuit module that converts the input voltage to the voltage required by the industrial control computer. It can be implemented using a DC-DC converter or a switching power supply chip, and its function is to adjust the input voltage to meet the equipment requirements. The output interface circuit 40 is the power output port connected to the industrial control computer. It can be implemented using an aviation plug with a locking structure, and its function is to stably transmit the converted electrical energy to the industrial control computer.

[0030] The core innovation of this embodiment lies in the design of directly connecting the first energy storage capacitor 20 to the input interface circuit 10. When the external power supply is temporarily disconnected, the energy stored in the capacitor is used to maintain the power supply. At the same time, a high-reliability interface circuit is used to reduce the risk of loose connection, thereby solving the problem of short-term power failure of the industrial control computer caused by vehicle bumps.

[0031] The working process and principle of this embodiment are as follows: The industrial control computer power supply includes an input interface circuit 10, a first energy storage capacitor 20, a power conversion circuit 30, and an output interface circuit 40. The input interface circuit 10 is used to connect to an external power source, providing initial electrical energy input to the entire system. The first energy storage capacitor 20 is electrically connected to the input interface circuit 10 and is used to store electrical energy. When the input interface circuit 10 is briefly disconnected from the external power source, the first energy storage capacitor 20 can release the stored electrical energy, maintaining the power supply stability of the system. The power input terminal of the power conversion circuit 30 is electrically connected to the input interface circuit 10, receiving electrical energy from the input interface circuit 10. The power conversion circuit 30 performs necessary conversion and regulation of the input electrical energy to meet the power supply requirements of the load equipment. The output interface circuit 40 is electrically connected to the power output terminal of the power conversion circuit 30, outputting the converted and regulated electrical energy to the load equipment.

[0032] These components work together to form a complete power supply system. When the external power supply is normal, electrical energy enters the system through the input interface circuit 10, simultaneously charging the first energy storage capacitor 20. The power conversion circuit 30 converts the input electrical energy into voltage and current suitable for the load device, and then supplies it to the load through the output interface circuit 40. When the external power supply experiences a brief interruption, the first energy storage capacitor 20 immediately releases the stored electrical energy, and continues to provide a stable power supply to the load through the power conversion circuit 30 and the output interface circuit 40, thereby preventing the load device from shutting down or restarting due to a brief power outage.

[0033] The selection of the first energy storage capacitor 20 has a significant impact on system performance. Its capacity needs to be large enough to maintain power supply during short-term power outages, but it cannot be too large to avoid increased size and extended charging time. This embodiment uses a 220μF capacitor as an example. The design of the power conversion circuit 30 needs to consider factors such as input voltage range, output voltage stability, and conversion efficiency to ensure a stable and reliable power output under various operating conditions.

[0034] As an optional implementation method, the specific implementation of this embodiment is as follows: The industrial control computer power supply includes an input interface circuit 10, a first energy storage capacitor 20, a power conversion circuit 30, and an output interface circuit 40. The input interface circuit 10 uses an aviation connector design to ensure reliable connection in vibration environments. The first energy storage capacitor 20 is a high-reliability electrolytic capacitor with a capacitance of 220μF and a rated voltage of 200V, capable of maintaining power supply for 200ms during short-term power outages. The power conversion circuit 30 uses a high-efficiency DC-DC converter module with an input voltage range of 43-160V AC, an output voltage of 24V DC, and a maximum output power of 100W. The output interface circuit 40 also uses an aviation connector design to ensure stable connection at the output end.

[0035] The power supply system operates as follows: External AC power enters the system through the input interface circuit 10, simultaneously charging the first energy storage capacitor 20. The DC-DC converter module converts the input AC power into 24V DC power. When the input power is briefly interrupted, the first energy storage capacitor 20 immediately releases its stored energy, and the DC-DC converter module continues to provide a stable 24V DC power supply to the load. Throughout the process, the output voltage fluctuation is controlled within ±5%, ensuring the normal operation of the load equipment.

[0036] This embodiment solves the problem of power outages caused by temporary interface loosening in industrial control computer power supplies under vehicle vibration environments through the above-described solution. By employing an energy storage capacitor as an energy buffer unit, a stable power supply can be continuously provided to precision equipment such as industrial control computers even in the event of a brief interruption of the input power, preventing unplanned equipment downtime or data loss. This design significantly improves the reliability and stability of the industrial control computer power supply in harsh working environments, ensuring the continuous operation and real-time response capability of the control system. Furthermore, this solution has a simple structure, is easy to implement, requires no redundant power supply, and reduces system complexity and cost.

[0037] This embodiment includes an input interface circuit 10, a first energy storage capacitor 20, a power conversion circuit 30, and an output interface circuit 40. First, the input interface circuit 10 is used to connect to an external power source. Then, the first energy storage capacitor 20 is electrically connected to the input interface circuit 10. The first energy storage capacitor 20 stores electrical energy to maintain power when the input interface circuit 10 is briefly disconnected from the external power source. Next, the power input terminal of the power conversion circuit 30 is electrically connected to the input interface circuit 10. Finally, the output interface circuit 40 is electrically connected to the power output terminal of the power conversion circuit 30. This prevents the industrial control computer from restarting or losing data due to a momentary power outage, improving the reliability of the power connection and the stability of equipment operation.

[0038] Optionally, refer to Figure 2 Another embodiment of this utility model provides an industrial control computer power supply, based on the above. Figure 1 In the embodiment shown, the power conversion circuit 30 includes a DC-DC power chip U1, wherein: The first input terminal of the DC-DC power chip U1 is connected to the first terminal of the input interface circuit 10. The first input terminal of the DC-DC power chip U1 is connected to the positive terminal of the first energy storage capacitor 20. The second input terminal of the DC-DC power chip U1 is connected to the second terminal of the input interface circuit 10. The second input terminal of the DC-DC power chip U1 is connected to the negative terminal of the first energy storage capacitor 20. The first output terminal of the DC-DC power chip U1 is connected to the first terminal of the output interface circuit 40. The second output terminal of the DC-DC power chip U1 is connected to the second terminal of the output interface circuit 40. A first capacitor CY5 is connected in parallel between the switching terminal and the negative input terminal of the DC-DC power chip U1.

[0039] In this circuit, the input terminal of the DC-DC power chip U1 is directly connected in parallel to the input interface circuit 10 and the first energy storage capacitor 20, while the output terminal is directly connected to the output interface circuit 40. The input terminal is connected to the positive and negative terminals of the energy storage capacitor to ensure that the capacitor can quickly replenish energy when the input voltage fluctuates. The output terminal is directly connected to the interface circuit to reduce impedance interference from intermediate links. For example, the first energy storage capacitor 20, with a 220μF / 200V specification, can provide energy buffering within 200ms.

[0040] When the input voltage of the input interface circuit 10 drops due to a short-term disconnection of the external power supply, the energy stored in the first energy storage capacitor 20 sustains its operation through the input terminal of the DC-DC power chip U1. The input terminal is directly connected to the positive and negative terminals of the energy storage capacitor, minimizing the discharge path impedance and ensuring that the input voltage of the DC-DC power chip U1 remains stable within the allowable range. The output terminal is directly connected to the output interface circuit 40, avoiding voltage drops or noise introduced by additional circuitry, thus ensuring that the industrial control computer continuously receives stable power during short-term power interruptions.

[0041] As a preferred embodiment, the solution of this embodiment is implemented as follows: The power conversion circuit 30 includes a DC-DC power chip U1. The first input terminal of the DC-DC power chip U1 is connected to the first terminal of the input interface circuit 10, and the first input terminal of the DC-DC power chip U1 is connected to the positive terminal of the first energy storage capacitor 20. The second input terminal of the DC-DC power chip U1 is connected to the second terminal of the input interface circuit 10, and the second input terminal of the DC-DC power chip U1 is connected to the negative terminal of the first energy storage capacitor 20. The first output terminal of the DC-DC power chip U1 is connected to the first terminal of the output interface circuit 40, and the second output terminal of the DC-DC power chip U1 is connected to the second terminal of the output interface circuit 40.

[0042] The DC-DC power chip U1 can be either the LM2596 series or the URF1D12HB-150W(H)R3(A5). This chip features a wide input voltage range, high efficiency, and low ripple, making it suitable for industrial control computer power supply requirements. The first and second input terminals of the DC-DC power chip U1 are connected to the positive and negative terminals of the input interface circuit 10, respectively, and also to the positive and negative terminals of the first energy storage capacitor 20. The first and second output terminals of the DC-DC power chip U1 are connected to the positive and negative terminals of the output interface circuit 40, respectively.

[0043] Through the above technical solution, this embodiment achieves stable power supply for the industrial control computer. The DC-DC power chip U1 can convert unstable input voltage into stable output voltage, meeting the power supply requirements of the industrial control computer. Simultaneously, the first energy storage capacitor 20 is connected in parallel with the input terminal of the DC-DC power chip U1, providing instantaneous power when the input power is briefly interrupted, ensuring power continuity. This design effectively solves the problem of short-term power outages caused by bumps during vehicle operation, improving the reliability and stability of the industrial control computer's power supply.

[0044] Optionally, refer to Figure 3 Another embodiment of this utility model provides an industrial control computer power supply, based on the above... Figure 1 In the embodiment shown, the industrial computer power supply further includes a second energy storage capacitor 50, wherein: The positive terminal of the second energy storage capacitor 50 is connected to the first output terminal of the DC-DC power chip U1, and the negative terminal of the second energy storage capacitor 50 is connected to the second output terminal of the DC-DC power chip U1.

[0045] The second energy storage capacitor 50 can be an electrolytic capacitor or a film capacitor, with a capacitance range of 100μF to 2200μF and a withstand voltage of not less than 1.5 times the rated voltage of the output terminal. The capacitor's leads are electrically connected to the output terminals of the DC-DC power chip U1 via surface mounting or through-hole soldering. The capacitor's mounting position is no more than 10mm from the chip's output terminal to reduce line impedance. The second energy storage capacitor 50 forms a parallel circuit with the output interface circuit 40, establishing an energy storage buffer layer between the power conversion circuit 30 and the load.

[0046] When a momentary voltage drop occurs at the output of the DC-DC power chip U1, the second energy storage capacitor 50 discharges to replenish energy to the output interface circuit 40, maintaining the continuity of the output voltage. When the output current of the power conversion circuit 30 suddenly increases, the capacitor absorbs excess charge to prevent voltage overshoot. For example, using a 220μF / 63V aluminum electrolytic capacitor can provide at least 5J of energy storage capacity within a 200ms time window. This capacitor, together with the first energy storage capacitor 20, forms a two-stage energy storage structure. The first stage provides short-term power interruption to the input side, while the second stage suppresses power disturbances on the output side. The two stages are decoupled through the power conversion circuit 30. The charging and discharging process of the capacitor is completed through a low-impedance path between the chip output and the load, effectively reducing voltage oscillations caused by line inductance.

[0047] As a preferred embodiment, the solution of this embodiment is implemented as follows: The industrial control computer power supply includes a second energy storage capacitor 50. The positive terminal of the second energy storage capacitor 50 is connected to the first output terminal of the DC-DC power chip U1. The negative terminal of the second energy storage capacitor 50 is connected to the second output terminal of the DC-DC power chip U1. The second energy storage capacitor 50 can be an electrolytic capacitor with a capacitance of 220μF and a voltage rating of 63V. The second energy storage capacitor 50 is connected in parallel to the output terminal of the DC-DC power chip U1 to stabilize the output voltage and reduce ripple.

[0048] Through the above technical solution, this embodiment can increase the energy storage capacity at the output terminal of the DC-DC power chip U1 to improve the stability of the industrial control computer's power supply. When the external power supply experiences short-term fluctuations, the second energy storage capacitor 50 can provide instantaneous current to maintain stable output voltage and prevent high-precision equipment such as industrial control computers from malfunctioning due to power fluctuations. In addition, the second energy storage capacitor 50 can also filter out the high-frequency ripple at the output of the DC-DC power chip U1, improve the output power quality, and provide a more stable and reliable power supply for the industrial control computer.

[0049] Optionally, refer to Figure 4 Another embodiment of this utility model provides an industrial control computer power supply, based on the above... Figure 1 In the embodiment shown, the industrial computer power supply further includes a first filter circuit 60, wherein: The first filter circuit 60 is connected in parallel across the two ends of the input interface circuit 10, and the first filter circuit 60 is used to filter out electromagnetic interference in the input power supply.

[0050] The first filter circuit 60 may include an LC filter network composed of a capacitor and an inductor. The capacitor and inductor are connected in series and then in parallel between the positive and negative terminals of the input interface circuit 10. The capacitance value can range from 1μF to 10μF, and the inductance value can range from 10μH to 100μH. The LC filter network absorbs high-frequency interference signals through the capacitor and suppresses current surges through the inductor, thereby reducing high-frequency noise in the input power supply.

[0051] In this embodiment, a 2.2μF / 250V capacitor is used as the first filter circuit 60.

[0052] When an external power source is connected through the input interface circuit 10, the first filter circuit 60 performs high-frequency filtering on the input current. The capacitor bypasses high-frequency interference signals to ground, and the inductor impedes instantaneous changes in current, thus stabilizing the current input to the first energy storage capacitor 20 and the power conversion circuit 30. For example, when the input power supply experiences instantaneous voltage fluctuations due to vehicle bumps, the first filter circuit 60 absorbs high-frequency components, reducing the impact of voltage spikes on subsequent circuits. Therefore, the input power received by the power conversion circuit 30 is more stable, the power quality of the output interface circuit 40 is guaranteed, and the industrial control computer can still operate reliably under short-term power outages or interference environments.

[0053] As a preferred embodiment, the solution of this embodiment is implemented as follows: The industrial control computer power supply includes a first filter circuit 60. The first filter circuit 60 is connected in parallel across the input interface circuit 10. The first filter circuit 60 is used to filter out electromagnetic interference in the input power supply. The first filter circuit 60 can adopt an LC filter structure, including an inductor and a capacitor. The inductor is connected in series on the positive terminal of the input interface circuit 10, and the capacitor is connected in parallel between the positive and negative terminals of the input interface circuit 10. Therefore, high-frequency electromagnetic interference signals can be effectively filtered out, ensuring the purity of the input power supply. Furthermore, a damping resistor can be connected in parallel across the inductor to suppress resonance.

[0054] Through the above technical solution, this embodiment can effectively filter out electromagnetic interference in the input power supply, improving the anti-interference capability of the industrial control computer power supply. As a result, the stability of the industrial control computer power supply in the vehicle environment is improved, reducing industrial control computer malfunctions caused by electromagnetic interference. At the same time, the filtered, clean power supply also helps extend the service life of subsequent circuit components.

[0055] Optionally, refer to Figure 5 In another embodiment, this utility model provides an industrial control computer power supply, based on the above... Figure 1 In the embodiment shown, the industrial computer power supply further includes a second filter circuit 70, wherein: The first end of the second filter circuit 70 is connected to the first end of the output interface circuit 40, and the second end of the second filter circuit 70 is connected to the second end of the output interface circuit 40. The second filter circuit 70 is used to smooth the output power.

[0056] The second filter circuit 70 consists of an LC filter network composed of capacitors and inductors. The capacitors are connected in parallel across the output interface circuit 40, and the inductors are connected in series between the output terminal of the power conversion circuit 30 and the output interface circuit 40. The capacitance ranges from 1μF to 470μF, and the inductance ranges from 10μH to 100μH. The cutoff frequency of the LC filter network is set to be less than one-tenth of the switching frequency of the power conversion circuit 30; for example, when the switching frequency is 500kHz, the cutoff frequency is designed to be 50kHz. The output interface circuit 40 and the second filter circuit 70 are connected by copper foil traces with a trace width of not less than 2mm to reduce line impedance.

[0057] In this embodiment, a 2.2μF / 250V capacitor is used as the second filter circuit 70.

[0058] In this circuit, when the pulsating DC power output from the power conversion circuit 30 passes through an inductor, the inductor suppresses sudden current changes, and the high-frequency components are bypassed to ground by the capacitor. After the industrial computer load is connected to the output interface circuit 40, voltage fluctuations caused by changes in load current are absorbed by the capacitor in the second filter circuit 70, maintaining the voltage across the output interface circuit 40 within a set threshold range. When the external power supply is briefly disconnected due to a loose interface, the first energy storage capacitor 20 maintains the voltage at the input of the power conversion circuit 30, and the second filter circuit 70 continuously filters the output power to prevent the industrial computer from restarting due to voltage drops or ripple interference. By adjusting the parameters of the capacitor in the second filter circuit 70, the ripple coefficient of the output power is controlled within 3%, meeting the industrial computer's requirements for power stability.

[0059] As a preferred embodiment, the solution of this embodiment is implemented as follows: The industrial control computer power supply includes a second filter circuit 70. The first terminal of the second filter circuit 70 is connected to the first terminal of the output interface circuit 40, and the second terminal of the second filter circuit 70 is connected to the second terminal of the output interface circuit 40. The second filter circuit 70 is used to smooth the output power. The second filter circuit 70 can adopt an LC filter structure, including an inductor and a capacitor, or a single capacitor. The inductor is connected in series on the positive terminal of the output interface circuit 40, and the capacitor is connected in parallel between the positive and negative terminals of the output interface circuit 40. Therefore, high-frequency ripple can be effectively filtered out, and the output DC voltage is more stable.

[0060] Through the above technical solution, this embodiment can effectively smooth the output power, reduce output voltage ripple, and improve the quality of the output power supply. Industrial control computers and other equipment can obtain a more stable power supply, thereby improving the reliability and stability of the system. Especially during vehicle operation, even if brief power fluctuations occur, the normal operation of the equipment can be guaranteed.

[0061] Optionally, refer to Figure 6Another embodiment of this utility model provides an industrial control computer power supply, based on the above. Figure 1 In the illustrated embodiment, the input interface circuit 10 includes multiple aviation connectors, and the output interface circuit 40 includes multiple aviation connectors. The aviation connectors include JATX1-JATX4, where JATX1-JATX2 are interfaces for the input interface circuit 10, and JATX3-JATX4 are interfaces for the output interface circuit 40.

[0062] The aviation plug employs a threaded rotary locking structure, forming multi-point contact with the socket through its metal casing. Each aviation plug's pins form an annular contact surface with the socket's internal spring contacts, resulting in a contact area more than twice that of a standard plug. The input interface circuit 10 is configured with two parallel aviation plugs, and the output interface circuit 40 is configured with three parallel aviation plugs.

[0063] In the input interface circuit 10, two aviation plugs are connected in parallel to the external power supply line. When the contact resistance of one plug increases due to vibration, the other plug can still maintain a conductive state. The three aviation plugs of the output interface are connected to different load lines, and the metal shell of each plug is connected to the ring shielding circuit 80 at the same potential through the grounding pin. When the plug is inserted into the socket, the thread structure can be fully locked by rotating two and a half turns. The thread pitch is designed to be 1.5mm, and the locking torque reaches 0.6N·m. The contact spring is made of beryllium copper alloy material, and the elastic modulus is controlled within the range of 110-130GPa. It can still maintain a contact gap of less than 0.1mm under vibration environment.

[0064] The aviation connector features a metal shell and a multi-pin connector structure, offering waterproof, dustproof, and vibration-resistant properties. The aviation connector for input interface circuit 10 is used to connect to an external power source, while the aviation connector for output interface circuit 40 is used to connect to an industrial control computer. The number of pins on the aviation connector can be selected according to actual needs; for example, a 3-pin, 4-pin, or 7-pin aviation connector can be used. The aviation connector employs either a bayonet or threaded connection method to ensure connection stability.

[0065] Through the above technical solution, this embodiment improves the reliability and stability of the industrial computer's power interface. The use of aviation connectors enhances the vibration resistance of the power connection and reduces the problem of interface loosening caused by vehicle operation bumps. At the same time, the waterproof and dustproof characteristics of aviation connectors also improve the adaptability of the industrial computer power supply in harsh environments, further ensuring the continuity and stability of power supply.

[0066] Optionally, refer to Figure 7 Another embodiment of this utility model provides an industrial control computer power supply, based on the above... Figure 1 In the embodiment shown, the industrial computer power supply further includes a ring-shaped shielding circuit 80, wherein: The ring shielding circuit 80 is connected to the ground of the output interface circuit 40, and the ring shielding circuit 80 is used to reduce the electromagnetic interference of the output power supply.

[0067] The shielding ring forms a closed loop through grounding, and a high-permeability material covers the outer periphery of the output cable to form a continuous magnetic layer. The high-permeability material can be permalloy or ferrite, with a relative permeability exceeding 10000 H / m. The diameter of the shielding ring's annular structure forms a clearance fit with the outer diameter of the output cable, with the clearance range controlled between 0.5-1.2 mm.

[0068] When the output interface circuit 40 transmits electrical energy, the shielding ring forms an equipotential body with the equipment chassis through the grounding terminal. Eddy currents are generated on the surface of the output cable by the electromagnetic field, and the high-permeability material confines the magnetic field lines within the ring structure. The permalloy shielding ring can increase the radiation attenuation in the 30MHz-1GHz frequency band by more than 12dB. The ring-shaped closed structure of the shielding ring prevents magnetic field leakage and forms a three-stage filtering system with the first filter circuit 60 and the second filter circuit 70, establishing a ripple voltage environment of less than 10mV at the power output. This design allows the industrial control computer to maintain signal integrity within ±2% error range even when a 200ms transient interruption occurs at the interface.

[0069] As an optional embodiment, the solution of this embodiment is implemented as follows: The industrial control computer power supply includes a ring-shaped shielding circuit 80. The ring-shaped shielding circuit 80 is connected to ground of the output interface circuit 40. The ring-shaped shielding circuit 80 is used to reduce electromagnetic interference from the output power supply.

[0070] The annular shielding circuit 80 can be a shielding cover made of metal. The shielding cover is cylindrical and is fitted over the output interface circuit 40. One end of the shielding cover is electrically connected to the ground terminal of the output interface circuit 40. The inner wall of the shielding cover can be coated with an absorbing material to further enhance the electromagnetic shielding effect.

[0071] In practical applications, the ring-shaped shielding circuit 80 can be customized according to the specific dimensions of the industrial PC power supply. For example, for a standard 19-inch rack-mount industrial PC power supply, the diameter of the shield can be designed to be approximately 20 cm, and the height approximately 5 cm. The thickness of the shield can be selected between 0.5 mm and 2 mm to balance shielding effectiveness and weight.

[0072] Through the above technical solution, this embodiment can effectively reduce electromagnetic interference from the industrial control computer power supply output. The ring shielding circuit 80 forms a closed electromagnetic barrier, blocking the outward propagation of electromagnetic radiation generated inside the power supply. This not only improves the electromagnetic compatibility of the industrial control computer power supply itself but also reduces electromagnetic interference to surrounding equipment. Therefore, the stability and reliability of the industrial control computer power supply in a vehicle environment are significantly improved, which is beneficial to ensuring the normal operation of the entire control system.

[0073] Optionally, refer to Figure 8 Another embodiment of this utility model provides an industrial control computer power supply, based on the above... Figure 1 In the embodiment shown, the ring-shaped shielding circuit 80 includes a shielding ring, wherein: The shielding ring is connected to the ground of the output interface circuit 40. The shielding ring is used to form an electromagnetic shielding layer when the output interface circuit 40 outputs power. The shielding ring can be made of a high-permeability magnetic material, which can effectively reduce electromagnetic radiation. The shielding rings include MH1-MH4.

[0074] The shielding ring forms a closed magnetic circuit using a high-permeability material. The material's internal permeability is significantly higher than that of air, effectively confining the electromagnetic field within the ring. The shielding ring is directly connected to the ground terminal of the output interface circuit 40, forming a low-impedance grounding path, allowing electromagnetic interference signals to be guided to ground through the ring. The ring-shaped structure of the shielding ring covers the power transmission path of the output interface circuit 40, forming a continuous electromagnetic shielding layer. The high-permeability material can be ferrite, silicon steel, or permalloy, with a relative permeability ranging from 1000 to 20000 and a thickness controlled between 0.5 mm and 2 mm.

[0075] The shielding ring surrounds the power lines of the output interface circuit 40. When the power lines transmit electrical energy, the alternating magnetic field generated around them is absorbed by the shielding ring, which is made of a high-permeability material. Because the magnetic reluctance of the high-permeability material is much lower than that of air, the magnetic field lines are confined inside the shielding ring, reducing the energy radiated outwards. After the shielding ring is connected to ground, the absorbed electromagnetic energy is discharged through the grounding path, preventing the accumulation of charge on the surface of the shielding ring and the formation of secondary radiation. The annular closed structure of the shielding ring eliminates magnetic leakage at the ends, ensuring that the electromagnetic field forms a closed loop within the ring. For example, using a 1mm thick ferrite toroidal core, the radiation intensity can be reduced by more than 30dB at a frequency of 100MHz, meeting the electromagnetic compatibility requirements in a vehicle environment.

[0076] In this embodiment, the shielding ring is made of permalloy and has an inner diameter 0.5 mm larger than the outer diameter of the power line of the output interface circuit 40. It is coaxially arranged around the power line of the output interface circuit 40. The shielding ring is welded to the grounding terminal of the output interface circuit 40 via copper wires, forming a continuous closed loop magnetic conductive path around the power line. The surface of the shielding ring is covered with a polyimide insulating layer with a thickness of 0.1 mm, and the shielding ring maintains a 3 mm gap from adjacent electronic components.

[0077] Through the above technical solution, this embodiment constructs a closed-loop magnetic circuit structure at the power output end of the industrial control computer. The electromagnetic shielding layer formed by the high permeability material can effectively absorb the alternating magnetic field generated by the power supply line and suppress the outward propagation of high-frequency electromagnetic radiation. When the vehicle generates mechanical vibration during operation, the continuous closed structure of the shielding ring can maintain a stable electromagnetic shielding effect, preventing electromagnetic interference from the output power supply from affecting the precision circuits inside the industrial control computer and ensuring the reliable operation of the equipment in complex electromagnetic environments.

[0078] This utility model also proposes an industrial control computer, which includes the industrial control computer power supply described in all the above embodiments.

[0079] It is worth noting that since the industrial control computer of this utility model is based on the above-mentioned industrial control computer power supply, the embodiments of the industrial control computer of this utility model include all the technical solutions of all the embodiments of the above-mentioned industrial control computer power supply, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0080] The industrial control computer power supply provides short-term power buffers at the input and output terminals through the first and second energy storage capacitors, respectively, to prevent output power fluctuations caused by short-term interruptions in the input power supply. The input and output interface circuits use multiple aviation plugs to enhance the mechanical stability of the interface connection. The ring shielding circuit reduces electromagnetic radiation interference from the output power supply through a shielding ring made of high magnetic permeability material. The power conversion circuit realizes the conversion of input voltage to output voltage through a DC-DC power chip, and the second energy storage capacitor further smooths the output voltage.

[0081] This utility model also proposes a vehicle, which includes an industrial control computer as described in the above embodiments.

[0082] It is worth noting that since the vehicle of this utility model is based on the aforementioned industrial control computer, the embodiments of the vehicle of this utility model include all the technical solutions of all the embodiments of the aforementioned industrial control computer, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0083] When the vehicle experiences bumps, the aviation connector of the input interface circuit may temporarily loosen. At this time, the first energy storage capacitor releases its stored energy to maintain the input power of the power conversion circuit and prevent the DC-DC power chip from experiencing abnormal output due to input interruption. The power conversion circuit converts the input power into a stable voltage required by the industrial control computer, and the second energy storage capacitor further buffers the power at the output end to suppress voltage fluctuations. The aviation connector of the output interface circuit reduces the risk of single-point loosening through multi-point connection, and the ring shielding circuit absorbs electromagnetic interference through high-permeability magnetic materials, reducing the interference of the output power supply to the internal circuits of the industrial control computer. As a result, the industrial control computer power supply can continue to provide stable power even in bumpy vehicle environments, ensuring the normal operation of the industrial control computer.

[0084] In this embodiment, in the onboard control system of the rail transit vehicle, the industrial control computer is fixedly mounted on the shock-absorbing bracket of the vehicle chassis. This industrial control computer has a built-in power module with a two-stage energy storage capacitor. The input interface of the power module is connected to the vehicle's 24V DC power supply system via a vibration-damping aviation connector, and the output end supplies power to the industrial control computer's computing unit via a cable wrapped with a ring-shaped magnetic shielding layer. When the train passes over the track joint and experiences mechanical vibration, the first energy storage capacitor continuously releases 220μF of stored energy within 200ms of the instantaneous increase in the contact resistance of the aviation connector. The second energy storage capacitor maintains the output voltage fluctuation within ±5% through a power conversion circuit, and the shielding ring reduces the electromagnetic radiation intensity of the output current to below 30dBμV / m.

[0085] Through the above technical solution, this embodiment effectively solves the problem of momentary poor contact of the power interface caused by mechanical vibration during vehicle operation. The short-term power compensation mechanism of the energy storage capacitor maintains the continuity of power supply to the industrial control computer. In conjunction with the electromagnetic shielding structure, the interference of power fluctuations on precision electronic equipment is suppressed, thus avoiding data loss or abnormal shutdown of industrial control equipment under bumpy conditions.

[0086] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An industrial control computer power supply, characterized in that, The industrial control computer power supply includes: An input interface circuit, wherein the input interface circuit is used to connect to an external power source; A first energy storage capacitor is electrically connected to the input interface circuit. The first energy storage capacitor is used to store electrical energy to maintain the electrical energy when the input interface circuit is briefly disconnected from the external power supply. A power conversion circuit, wherein the power input terminal of the power conversion circuit is electrically connected to the input interface circuit; An output interface circuit is electrically connected to the power output terminal of the power conversion circuit. The power conversion circuit includes: A DC-DC power chip has a first input terminal connected to the first terminal of the input interface circuit, a first input terminal connected to the positive terminal of the first energy storage capacitor, a second input terminal connected to the second terminal of the input interface circuit, a second input terminal connected to the negative terminal of the first energy storage capacitor, a first output terminal connected to the first terminal of the output interface circuit, a second output terminal connected to the second terminal of the output interface circuit, and a first capacitor connected in parallel between the switching terminal and the negative input terminal of the DC-DC power chip.

2. The industrial control computer power supply as described in claim 1, characterized in that, The industrial control computer power supply also includes: The second energy storage capacitor has its positive terminal connected to the first output terminal of the DC-DC power chip, and its negative terminal connected to the second output terminal of the DC-DC power chip.

3. The industrial control computer power supply as described in claim 1, characterized in that, The industrial control computer power supply also includes: A first filter circuit is connected in parallel across the two ends of the input interface circuit. The first filter circuit is used to filter out electromagnetic interference in the input power supply.

4. The industrial control computer power supply as described in claim 1, characterized in that, The industrial control computer power supply also includes: The second filter circuit has a first terminal connected to the first terminal of the output interface circuit and a second terminal connected to the second terminal of the output interface circuit. The second filter circuit is used to smooth the output power.

5. The industrial control computer power supply as described in claim 1, characterized in that, The input interface circuit includes multiple aviation connectors, and the output interface circuit includes multiple aviation connectors.

6. The industrial control computer power supply as described in claim 1, characterized in that, The industrial control computer power supply also includes: A ring-shaped shielding circuit is connected to the ground of the output interface circuit. The ring-shaped shielding circuit is used to reduce electromagnetic interference of the output power supply.

7. The industrial control computer power supply as described in claim 6, characterized in that, The ring-shaped shielding circuit includes: A shielding ring is connected to the ground of the output interface circuit. The shielding ring is used to form an electromagnetic shielding layer when the output interface circuit outputs power.

8. An industrial control computer, characterized in that, The industrial control computer includes an industrial control computer power supply as described in any one of claims 1 to 7.

9. A vehicle, characterized in that, Including the industrial control computer as described in claim 8.

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