Industrial control mainboard wide voltage input device and method

Abstract

This invention discloses a wide-voltage input device and method for industrial control motherboards. Through a DC-DC conversion circuit, different high and low input voltages can be adjusted to a stable voltage according to preset rules, freeing the industrial control motherboard from dependence on a single voltage, widening the input voltage range, and ensuring compatibility with various external power supply units, thus reducing system setup and maintenance costs. Secondly, the input protection circuit can monitor the voltage in real time, immediately blocking current in case of overvoltage to prevent hardware damage and ensure motherboard safety. Simultaneously, the input protection circuit has a reverse insertion protection function, automatically identifying reverse power connection and blocking current, reducing faults and repair costs caused by human error. Operators do not need to worry excessively about the power connection direction, reducing operational difficulty, improving work efficiency, reducing equipment damage and downtime, and ensuring the continuity of industrial production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial control mainboard voltage input, and particularly relates to an industrial control mainboard wide voltage input device and method. BACKGROUND

[0002] In the field of industrial control, the industrial control mainboard as a core control component, its stable and reliable operation is crucial to the entire industrial control system, and the normal work of the industrial control mainboard cannot be separated from stable power supply, and the diversity and complexity of the external power supply unit bring many challenges to the power supply of the industrial control mainboard.

[0003] In different industrial application scenarios, the external power supply unit may come from various different power supply devices, such as different specifications of switching power supply, battery pack and the like, and the output voltage of these external power supply units often has differences, some of which may have high voltage, and some of which may have large voltage fluctuation, and the traditional industrial control mainboard power supply mode usually has strict requirements on the input voltage and can only work normally in a specific narrow voltage range, once the output voltage of the external power supply unit exceeds this range, the industrial control mainboard may not start normally, and even the precise electronic elements on the mainboard may be damaged due to high voltage, which seriously affects the stability and reliability of the industrial control system. SUMMARY

[0004] Therefore, the present application provides an industrial control mainboard wide voltage input device and method, which can effectively solve the defects of strict requirements on input voltage and only normal work in a specific narrow voltage range in the prior art.

[0005] The technical scheme of the present application is as follows:

[0006] An industrial control mainboard wide voltage input device comprises:

[0007] An input protection circuit is used for connecting with an external power supply unit and realizing overvoltage protection and anti-reverse insertion protection functions;

[0008] A DC-DC conversion circuit is used for converting the voltage of the external power supply unit into an industrial control mainboard input voltage.

[0009] As a further optional scheme of the industrial control mainboard wide voltage input device, the input protection circuit comprises:

[0010] An external power supply unit connection interface is used for connecting with the external power supply unit;

[0011] An overvoltage protection module is used for realizing the overvoltage protection function and adopting a TVS tube and its peripheral circuit;

[0012] An anti-reverse insertion protection module is used for realizing the anti-reverse insertion protection function and adopting a PMOS tube and its peripheral circuit.

[0013] As a further optional solution of the wide voltage input device of the industrial control mainboard, the external power supply unit connection interface adopts phoenix terminals or ATX4PIN pins to connect with the external power supply unit.

[0014] As a further optional solution of the wide voltage input device of the industrial control mainboard, the TVS tube and its peripheral circuit include a TVS tube and a matching voltage dividing resistor network, a filtering capacitor; the TVS tube is used to automatically conduct when the input voltage exceeds its breakdown voltage, and clamp the voltage in a safe range; the voltage dividing resistor network is used to monitor the input voltage, and the TVS tube automatically conducts for clamping when the voltage exceeds the breakdown voltage of the TVS tube; the filtering capacitor is used to absorb high-frequency voltage transients and suppress electromagnetic interference.

[0015] As a further optional solution of the wide voltage input device of the industrial control mainboard, the PMOS tube and its peripheral circuit include a PMOS tube and a matching voltage stabilizing diode, a current limiting resistor, the PMOS tube is used to conduct the current path when the external power supply is connected in positive, and automatically turn off to block the current when it is connected in reverse, the voltage stabilizing diode is used to clamp the gate voltage of the PMOS tube within a safe range, and the current limiting resistor is used to limit the charging current of the gate of the PMOS tube, control the conduction speed and suppress the switching noise.

[0016] As a further optional solution of the wide voltage input device of the industrial control mainboard, the DC-DC conversion circuit includes:

[0017] A control module for adjusting the switching of the MOS tube module through a PWM current control architecture;

[0018] A MOS tube module composed of upper and lower bridge MOS tubes, for converting the input voltage into a stable 12V output;

[0019] An output inductor module for energy storage and filtering, when the howling caused by the resonance of the switching frequency and the inherent frequency of the inductor occurs, the howling is suppressed by adjusting the switching frequency or increasing the output capacitor.

[0020] As a further optional solution of the wide voltage input device of the industrial control mainboard, the control module includes an MP9928 chip and its peripheral circuit.

[0021] A wide voltage input method for an industrial control mainboard, specifically including:

[0022] Connecting the external power supply unit with the input protection circuit, the input protection circuit monitors the voltage value output by the external power supply unit in real time, when it is monitored that the voltage value exceeds the preset overvoltage protection threshold, the input protection circuit immediately starts the overvoltage protection function to block the current transmission to the subsequent circuit, at the same time, when the external power supply unit is connected in reverse, the input protection circuit automatically prevents the current from passing through.

[0023] When the external power supply unit is properly connected and the voltage is within a safe range, the DC-DC conversion circuit starts to work. The DC-DC conversion circuit converts the voltage input from the external power supply unit into the input voltage of the industrial control motherboard. The converted input voltage of the industrial control motherboard is stably output to the industrial control motherboard.

[0024] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described wide voltage input method for industrial control motherboards.

[0025] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described wide voltage input method for an industrial control motherboard.

[0026] The beneficial effects of this invention are: The DC-DC conversion circuit can convert different voltage values ​​input from external power supply units into a stable input voltage required by the industrial control motherboard. Regardless of whether the output voltage of the external power supply unit is relatively high or low, the conversion circuit can adjust the voltage according to preset conversion rules, ensuring that the industrial control motherboard always obtains a suitable operating voltage. This eliminates dependence on a single specific voltage, greatly expanding the acceptable input voltage range. Furthermore, since different types of external power supply units (such as switching power supplies of different power ratings, batteries of different capacities, etc.) output different voltages, the wide voltage input characteristic of this device makes it compatible with various external power supply units. This makes the selection of power supply units more flexible during the construction and maintenance of industrial control systems, eliminating the need for strictly matching power supplies with specific voltage specifications, thus reducing system construction costs and maintenance difficulty. Secondly, the input protection circuit continuously monitors the voltage output by the external power supply unit in real time. Once the voltage value exceeds the preset overvoltage protection threshold, it immediately activates the protection mechanism to block the current from being transmitted to subsequent circuits. By timely blocking the current, the input protection circuit effectively avoids the risk of hardware damage caused by overvoltage, ensuring the safety of the industrial control motherboard. In addition, the input protection circuit's reverse insertion protection function can automatically identify the reverse power connection state and immediately block the current from passing through, effectively avoiding damage caused by such misoperation, reducing system failures and maintenance costs caused by human error. With the reverse insertion protection function, operators do not need to worry excessively about the power connection direction during installation and maintenance, reducing the complexity and difficulty of operation. This not only improves work efficiency but also reduces equipment damage and system downtime caused by incorrect connections, ensuring the continuity of industrial production. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the composition of a wide voltage input device for an industrial control motherboard according to the present invention;

[0029] Figure 2 This is a circuit diagram of the input protection circuit in this invention;

[0030] Figure 3 This is a circuit diagram of the DC-DC conversion circuit in this invention;

[0031] Figure 4 This is a flowchart illustrating an intelligent voice control method for motorcycles according to the present invention.

[0032] Figure 5 This is a schematic diagram of the composition of a computing device according to the present invention. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] refer to Figures 1 to 5 An industrial control motherboard wide voltage input device includes an input protection circuit and a DC-DC conversion circuit, wherein:

[0035] An input protection circuit is used to connect to an external power supply unit and to provide overvoltage protection and reverse insertion protection. In some embodiments, the input protection circuit includes:

[0036] External power supply unit connection interface, used for connecting to an external power supply unit;

[0037] The overvoltage protection module is used to implement the overvoltage protection function, and it adopts a TVS diode and its peripheral circuit.

[0038] The reverse insertion protection module is used to implement the reverse insertion protection function, and it adopts a PMOS transistor and its peripheral circuit.

[0039] Specifically, the external power supply unit connection interface establishes a standard and stable connection bridge between the external power supply unit and the input protection circuit. It can adapt to various types of external power supply unit connectors, allowing external power supply units of various specifications to be easily connected to the system. This greatly improves the compatibility of the industrial control motherboard with different power sources. In the industrial field, whether using common switching power supplies, special industrial power supplies or backup batteries, they can be successfully connected through this interface, simplifying the configuration and replacement process of the power supply system.

[0040] TVS (Transient Voltage Suppressor) diodes have extremely fast response speeds. When the external power supply unit experiences a sudden voltage surge, such as overvoltage caused by lightning strikes or power grid fluctuations, the TVS diode can enter a breakdown state within a very short time (picoseconds), clamping the overvoltage to a safe level. This effectively prevents excessive voltage surges from damaging sensitive components in subsequent circuits, such as chips and transistors, ensuring the safe and stable operation of the input protection circuit and the entire industrial control motherboard. Secondly, the overvoltage protection module composed of the TVS diode and its peripheral circuits can provide a stable overvoltage protection threshold. Its peripheral circuits can optimize and adjust the operating state of the TVS diode, ensuring that the overvoltage protection function can reliably function under different environmental conditions such as temperature and humidity. Even in complex industrial environments, it can continuously provide accurate overvoltage protection for the circuit, reducing the risk of protection failure due to environmental changes.

[0041] PMOS transistors have unique conduction characteristics. When the external power supply unit is connected normally, the PMOS transistor conducts under the control of a suitable gate voltage, allowing current to flow normally. However, when the power supply is reversed, the gate voltage of the PMOS transistor changes, causing it to quickly enter the cutoff state and automatically block the current flow. This automatic identification and blocking function requires no manual intervention and can effectively prevent faults such as short circuits and component burnout caused by reverse power connection, protecting the overall integrity of the input protection circuit and the industrial control motherboard. Secondly, PMOS transistors have low on-resistance in the conducting state, which can reduce energy loss when current flows and improve power supply efficiency. At the same time, its efficient reverse connection protection capability ensures that the current can be quickly cut off at the moment of reverse power connection, avoiding potential damage to the circuit caused by abnormal current flow and extending the service life of the equipment.

[0042] In some embodiments, the external power supply unit connection interface uses a Phoenix terminal or an ATX4PIN connector to connect to the external power supply unit.

[0043] Specifically, Phoenix terminals have excellent contact performance. Their unique structural design ensures a tight and stable connection between the plug and the socket. In industrial environments, equipment is often affected by external factors such as vibration and impact. With its reliable connection method, Phoenix terminals can effectively avoid contact problems caused by vibration, ensure continuous and stable power transmission between the external power supply unit and the input protection circuit, and reduce the risk of power outages or voltage fluctuations caused by loose connections.

[0044] The ATX4PIN connector features precise pin positioning and a robust insertion / removal force design, ensuring accurate connection to the corresponding socket. In industrial motherboard power supply scenarios, using the ATX4PIN connector ensures connection accuracy and stability, preventing electrical faults caused by pin misalignment or poor contact, and providing reliable power input to the industrial motherboard.

[0045] In some embodiments, the TVS diode and its peripheral circuitry include the TVS diode and a voltage divider resistor network and a filter capacitor that work together with it; the TVS diode is used to automatically turn on when the input voltage exceeds its breakdown voltage to clamp the voltage within a safe range; the voltage divider resistor network is used to monitor the input voltage, and when the voltage exceeds the TVS diode's breakdown voltage, the TVS diode automatically turns on to clamp the voltage; the filter capacitor is used to absorb high-frequency voltage transients and suppress electromagnetic interference.

[0046] Specifically, the voltage divider resistor network monitors the input voltage in real time and divides it proportionally to accurately determine whether the voltage exceeds the breakdown voltage of the TVS diode. When the voltage exceeds the set threshold, it provides the trigger condition for the TVS diode to conduct (although the TVS diode itself is passively triggered, the voltage divider resistor network plays the role of monitoring and determining the triggering time). This precise monitoring and triggering mechanism ensures the timeliness and accuracy of the overvoltage protection function. The protection is only activated when there is a real overvoltage danger, avoiding false operation.

[0047] Filter capacitors can absorb high-frequency voltage transients and effectively suppress electromagnetic interference. In industrial settings, various electromagnetic noise sources exist, such as those generated by motors and frequency converters. This interference may couple into the power supply line, causing high-frequency fluctuations in the input voltage. Filter capacitors, through charging and discharging, absorb and filter out these high-frequency interference signals, making the input voltage smoother and more stable. This provides a clean power environment for the industrial control motherboard, helping to improve its stability and reliability. Secondly, the TVS diode, voltage divider resistor network, and filter capacitor work together to ensure the stability of the input voltage. The TVS diode prevents overvoltage surges, the voltage divider resistor network monitors the voltage status in real time, and the filter capacitor eliminates high-frequency interference. The three work together to ensure that the voltage input to the industrial control motherboard is always within a safe and stable range, reducing system failures and malfunctions caused by voltage fluctuations.

[0048] The TVS diode and its peripheral circuitry constitute a relatively complete overvoltage protection and filtering solution, eliminating the need for additional complex protection circuits. This integrated design simplifies the circuit structure, reduces the space occupied by the circuit board, and lowers the complexity and cost of circuit design. Secondly, due to the simplified circuit design, the manufacturing and assembly of the circuit board are more convenient and faster during the production process, which helps to improve production efficiency and reduce production costs.

[0049] In some embodiments, the PMOS transistor and its peripheral circuitry include the PMOS transistor and a Zener diode and a current-limiting resistor that work together with it. The PMOS transistor is used to conduct the current path when the external power supply is connected in the positive direction and to automatically turn off to block the current when the external power supply is connected in the reverse direction. The Zener diode is used to clamp the gate voltage of the PMOS transistor within a safe range. The current-limiting resistor is used to limit the gate charging current of the PMOS transistor, control the conduction speed, and suppress switching noise.

[0050] Specifically, the Zener diode clamps the gate voltage of the PMOS transistor within a safe range. During circuit operation, fluctuations in the power supply voltage or other factors may cause the gate voltage to exceed the rated withstand voltage of the PMOS transistor. The Zener diode can promptly limit the excessive voltage to a safe level, preventing the PMOS transistor from being damaged due to gate overvoltage. This ensures that the PMOS transistor can operate stably under various operating conditions, extends its service life, and improves the reliability of the entire circuit. Secondly, regardless of how the voltage output from the external power supply unit changes, the Zener diode can continuously perform its clamping function, providing a stable gate voltage environment for the PMOS transistor. This allows the device to adapt to a wider range of input voltages and enhances its compatibility with different external power supplies.

[0051] Current-limiting resistors can limit the charging current of a PMOS transistor's gate, thereby controlling the PMOS transistor's turn-on speed. A slower turn-on speed helps reduce current surges and avoids excessive current spikes at the moment of turn-on, protecting the PMOS transistor and components in subsequent circuits. At the same time, reasonable turn-on speed control also helps improve circuit stability and reduce voltage fluctuations caused by rapid switching. Secondly, during the switching process of a PMOS transistor, current-limiting resistors can effectively suppress the generation of switching noise. Switching noise may interfere with surrounding electronic equipment and affect the normal operation of the entire industrial control system. By limiting the rate of change of current, current-limiting resistors reduce the generation and propagation of high-frequency noise, improve the electromagnetic compatibility of the device, and enable the industrial control motherboard to operate in a quieter electromagnetic environment.

[0052] The PMOS transistor, Zener diode, and current-limiting resistor work together to ensure that the external power supply can stably and safely power the industrial control motherboard. They form an organic whole and play an important role in power input, conduction control, voltage stabilization, and noise suppression, reducing system failures and downtime caused by power supply problems and improving the efficiency and reliability of industrial production.

[0053] A DC-DC converter circuit is used to convert the voltage of an external power supply unit into the input voltage of an industrial control motherboard; in some embodiments, the DC-DC converter circuit includes:

[0054] The control module is used to regulate the switching of the MOSFET module through a PWM current control architecture;

[0055] The MOSFET module, consisting of upper and lower bridge MOSFETs, is used to convert the input voltage into a stable 12V output.

[0056] The output inductor module is used for energy storage and filtering. When a whistling sound occurs due to the resonance between the switching frequency and the inductor's natural frequency, it can be suppressed by adjusting the switching frequency or increasing the output capacitor.

[0057] Specifically, the MOSFET module, composed of upper and lower bridge MOSFETs, can convert the input external power supply unit voltage into a stable 12V output. The coordinated operation of the upper and lower bridge MOSFETs can achieve efficient power conversion. Through reasonable switching control, it ensures a relatively stable 12V output voltage under different input voltage conditions, meeting the industrial control motherboard's requirements for stable power supply and providing a reliable operating voltage environment for various electronic components on the industrial control motherboard. Secondly, this circuit design allows it to adapt to the input voltage of external power supply units of different specifications. Regardless of whether the external power supply unit outputs a higher or lower voltage, the DC-DC conversion circuit can convert it into a standard 12V output, broadening the applicability of the industrial control motherboard to external power sources.

[0058] The control module regulates the switching of the MOSFET module through a PWM (Pulse Width Modulation) current control architecture. PWM technology can precisely adjust the on-time and off-time of the MOSFET according to changes in input voltage and load, thereby achieving precise control of the output current. This helps improve power conversion efficiency, reduce energy loss, reduce circuit heat generation, and extend the service life of the equipment. Secondly, PWM regulation can make the output voltage and current more stable, reduce voltage fluctuations and current ripple, and improve power quality. Stable power output is crucial for power-sensitive components on the industrial control motherboard, such as chips and sensors, ensuring their normal and reliable operation.

[0059] The output inductor module can store and release energy, and also acts as a filter. During circuit switching, the inductor can smooth current changes and reduce noise caused by sudden current changes. When a whistling sound occurs due to resonance between the switching frequency and the inductor's natural frequency, it can be suppressed by adjusting the switching frequency or increasing the output capacitor, further reducing the noise interference generated by the circuit. Secondly, reducing noise interference not only benefits the stable operation of the industrial control motherboard itself, but also improves the electromagnetic compatibility of the entire industrial control system. In industrial environments, there are various sources of electromagnetic interference. The noise suppression function of this DC-DC converter circuit can prevent its own noise from interfering with other equipment, and at the same time, it can better resist external electromagnetic interference.

[0060] In some embodiments, the control module includes an MP9928 chip and its peripheral circuitry.

[0061] Specifically, the MP9928 chip is a synchronous buck controller IC with a wide input voltage of 4V-60V. It is packaged in a TSSOP20-EP / QFN-20 package, supports PWM current control architecture and multiple protection functions, and has a maximum duty cycle of 99.5%. The voltage drop during 12V to 12V conversion is very small. The voltage entering through the protection circuit is controlled by the MP9928 to switch the MOSFET and output a stable 12V as the main power supply for the industrial control board.

[0062] A method for wide voltage input on an industrial control motherboard, specifically including:

[0063] Connect the external power supply unit to the input protection circuit. The input protection circuit monitors the voltage value output by the external power supply unit in real time. When the voltage value exceeds the preset overvoltage protection threshold, the input protection circuit immediately activates the overvoltage protection function to block the current from being transmitted to the subsequent circuit. At the same time, when the external power supply unit is connected in reverse, the input protection circuit automatically prevents the current from passing through.

[0064] When the external power supply unit is properly connected and the voltage is within a safe range, the DC-DC conversion circuit starts to work. The DC-DC conversion circuit converts the voltage input from the external power supply unit into the input voltage of the industrial control motherboard. The converted input voltage of the industrial control motherboard is stably output to the industrial control motherboard.

[0065] A computing device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the above-described wide voltage input method for industrial control motherboards.

[0066] A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-described wide voltage input method for an industrial control motherboard.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wide voltage input device for an industrial control motherboard, characterized in that, include: Input protection circuit, used to connect to external power supply unit, and to realize overvoltage protection and reverse insertion protection functions; A DC-DC converter circuit is used to convert the voltage of an external power supply unit into the input voltage of an industrial control motherboard.

2. The wide voltage input device for industrial control motherboards according to claim 1, characterized in that, The input protection circuit includes: External power supply unit connection interface, used for connecting to an external power supply unit; The overvoltage protection module is used to implement the overvoltage protection function, and it adopts a TVS diode and its peripheral circuit. The reverse insertion protection module is used to implement the reverse insertion protection function, and it adopts a PMOS transistor and its peripheral circuit.

3. The wide voltage input device for industrial control motherboards according to claim 2, characterized in that, The external power supply unit connection interface uses a Phoenix terminal or an ATX4PIN pin to connect to the external power supply unit.

4. The wide voltage input device for industrial control motherboards according to claim 3, characterized in that, The TVS diode and its peripheral circuitry include the TVS diode, a voltage divider resistor network, and a filter capacitor. The TVS diode automatically turns on when the input voltage exceeds its breakdown voltage, clamping the voltage within a safe range. The voltage divider resistor network monitors the input voltage, and when the voltage exceeds the TVS diode's breakdown voltage, the TVS diode automatically turns on to clamp the voltage. The filter capacitor absorbs high-frequency voltage transients and suppresses electromagnetic interference.

5. The wide voltage input device for industrial control motherboards according to claim 4, characterized in that, The PMOS transistor and its peripheral circuitry include the PMOS transistor and a Zener diode and a current-limiting resistor that work together with it. The PMOS transistor is used to conduct current when the external power supply is connected in the positive direction and to automatically turn off to block current when the external power supply is connected in the reverse direction. The Zener diode is used to clamp the gate voltage of the PMOS transistor within a safe range. The current-limiting resistor is used to limit the gate charging current of the PMOS transistor, control the conduction speed, and suppress switching noise.

6. The wide voltage input device for industrial control motherboards according to claim 1, characterized in that, The DC-DC conversion circuit includes: The control module is used to regulate the switching of the MOSFET module through a PWM current control architecture; The MOSFET module, consisting of upper and lower bridge MOSFETs, is used to convert the input voltage into a stable 12V output. The output inductor module is used for energy storage and filtering. When a whistling sound occurs due to the resonance between the switching frequency and the inductor's natural frequency, it can be suppressed by adjusting the switching frequency or increasing the output capacitor.

7. The wide voltage input device for industrial control motherboards according to claim 6, characterized in that, The control module includes an MP9928 chip and its peripheral circuitry.

8. A method for wide voltage input on an industrial control motherboard, characterized in that, Specifically, it includes: Connect the external power supply unit to the input protection circuit. The input protection circuit monitors the voltage value output by the external power supply unit in real time. When the voltage value exceeds the preset overvoltage protection threshold, the input protection circuit immediately activates the overvoltage protection function to block the current from being transmitted to the subsequent circuit. At the same time, when the external power supply unit is connected in reverse, the input protection circuit automatically prevents the current from passing through. When the external power supply unit is properly connected and the voltage is within a safe range, the DC-DC conversion circuit starts to work. The DC-DC conversion circuit converts the voltage input from the external power supply unit into the input voltage of the industrial control motherboard. The converted input voltage of the industrial control motherboard is stably output to the industrial control motherboard.

9. A computing device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the wide voltage input method for industrial control motherboards as described in claim 8.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which, when executed by a processor, implements the steps of the wide voltage input method for industrial control motherboards as described in claim 8.

Images