A power input high voltage protection device

Abstract

This utility model discloses a high-voltage protection device for power input, comprising: a sensor module; the sensor module is used to collect voltage, current and temperature signals of the power supply in real time; this utility model introduces a MOSFET fast cut-off circuit, the MOSFET's operating speed is much higher than that of a mechanical relay, and it quickly cuts off the input power supply when high voltage is detected, protecting the downstream circuit, effectively dealing with transient high voltage impacts and avoiding equipment damage caused by slow response speed; based on the fast cut-off provided by the MOSFET, a varistor is used as an auxiliary protection element to absorb high voltage transient energy, further mitigating the impact of high voltage on downstream equipment. At the same time, varistor one is used to absorb transient high voltage impacts, and varistor two is used for backup protection under continuous high voltage conditions; by integrating a Wi-Fi communication module and an OLED screen, it provides comprehensive real-time monitoring, remote management and fault diagnosis functions, meeting the needs of modern intelligent equipment protection.

Description

Technical Field

[0001] This utility model relates to the field of high voltage protection technology, specifically a power input high voltage protection device. Background Technology

[0002] High-voltage power input protection devices are designed to address equipment damage and safety hazards that can occur in power systems due to high-voltage input. With the continuous development of power electronics technology, power supply equipment is increasingly widely used, including communication equipment, industrial automation equipment, and household appliances. These devices require a stable voltage input during normal operation, but under certain circumstances, such as lightning strikes, equipment failures, or grid fluctuations, high-voltage input may occur, leading to damage or failure of internal components, and even causing safety accidents such as fires. Therefore, developing a reliable high-voltage protection device is particularly important. This protection device typically employs overvoltage detection and rapid power disconnection mechanisms, effectively protecting equipment instantly upon high-voltage input. Furthermore, modern high-voltage protection devices can integrate intelligent monitoring and fault alarm functions, enhancing system safety and convenience. By introducing advanced sensing technology and microprocessor control, high-voltage power input protection devices not only achieve efficient protection functions but also improve the overall reliability of the power system, meeting the ever-increasing demands for safety and performance.

[0003] However, existing technologies still have significant shortcomings, such as:

[0004] In traditional high-voltage protection devices for power input, the protection response mainly relies on mechanical relays. Therefore, when faced with transient high voltage or rapidly changing high voltage surges, the response speed of traditional solutions is insufficient, which can easily lead to damage to downstream circuits or equipment. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage protection device for power input to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-voltage protection device for power input, comprising:

[0008] Sensor module; the sensor module is used to collect voltage, current and temperature signals of the power supply in real time;

[0009] A central processing module; the central processing module is communicatively connected to the sensor module, and the central processing module is responsible for signal processing;

[0010] An execution module is communicatively connected to a central processor module. The execution module includes a MOSFET fast cut-off circuit, a relay steady-state isolation circuit, a varistor I, and a varistor II. The central processor module sends control signals to the execution module. The MOSFET fast cut-off circuit is connected in series in the power input circuit. The relay steady-state isolation circuit is connected in series with the rear end of the MOSFET fast cut-off circuit. The varistor I and varistor II are connected in parallel in the input circuit.

[0011] Auxiliary module; the auxiliary module is used for remote monitoring and management.

[0012] Preferably, the sensor module includes a current sensor, a voltage sensor, and a temperature sensor, with the current sensor connected in series in the power input circuit.

[0013] Preferably, the central processor module includes a microcontroller, a power supply circuit, a crystal oscillator circuit, and signal processing components. The power supply circuit is used to convert the main power supply circuit voltage into the operating voltage of the microcontroller, and the crystal oscillator circuit provides a clock signal to the microcontroller.

[0014] Preferably, the signal processing element is an RC filter.

[0015] Preferably, the auxiliary module includes a communication module, a display module, and an energy buffer module, wherein the energy buffer module is a capacitor.

[0016] Preferably, the display module is an OLED screen and the communication module is a WIFI module.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. With the introduction of the MOSFET fast cut-off circuit, the MOSFET's operating speed is much higher than that of the mechanical relay, and the response time can reach the level of 1 microsecond. When high voltage is detected, the input power is quickly cut off to protect the back-end circuit. Combined with the high-speed logic judgment of the central processor, it can effectively cope with transient high voltage impacts and avoid equipment damage caused by slow response speed.

[0019] 2. Based on the fast cut-off provided by the MOSFET, the varistor is used as an auxiliary protection element to absorb the transient energy of the high voltage and further reduce the impact of the high voltage on the downstream equipment. At the same time, varistor one is used to absorb the transient high voltage impact, and varistor two is used for backup protection under continuous high voltage conditions.

[0020] 3. By integrating a Wi-Fi communication module and an OLED screen, it provides comprehensive real-time monitoring, remote management, and fault diagnosis functions, meeting the needs of modern intelligent equipment protection. Attached Figure Description

[0021] Figure 1 This is a system framework diagram of the high voltage protection device for power input of this utility model;

[0022] Figure 2 This is a module frame diagram of the high voltage protection device for power input of this utility model.

[0023] In the diagram: 1. Sensor module; 11. Current sensor; 12. Voltage sensor; 13. Temperature sensor; 2. Central processor module; 21. Microcontroller; 22. Power supply circuit; 23. Crystal oscillator circuit; 24. Signal processing element; 3. Execution module; 31. MOSFET fast cut-off circuit; 32. Relay steady-state isolation circuit; 33. Varistor I; 34. Varistor II; 4. Auxiliary module; 41. Communication module; 42. Display module; 43. Energy buffer module. Detailed Implementation

[0024] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-2 This utility model provides a technical solution:

[0026] A high-voltage protection device for power input, comprising:

[0027] Sensor module 1; Sensor module 1 is used to collect voltage, current and temperature signals of the power supply in real time. Sensor module 1 includes current sensor 11, voltage sensor 12 and temperature sensor 13. Current sensor 11 is connected in series in the power supply input circuit.

[0028] Sensor module 1 is responsible for acquiring signals such as voltage, current and temperature, and transmitting these parameters to central processor module 2 in analog or digital form. Voltage sensor 12 is connected to the power input, and the high voltage is reduced to a safe range by a voltage divider resistor. The voltage signal after voltage division is amplified and filtered by LM358 and output to central processor module 2. Current sensor 11 is a Hall current sensor. Current sensor 11 is connected in series in the power input circuit, measures the current and outputs an analog signal to central processor module 2. Temperature sensor 13 is used to monitor the temperature of varistor 33 and varistor 34, and outputs an analog signal to central processor module 2.

[0029] Central processor module 2; Central processor module 2 is communicatively connected to sensor module 1. The central processor module is responsible for signal processing. Central processor module 2 includes microcontroller 21, power supply circuit 22, crystal oscillator circuit 23 and signal processing element 24. Power supply circuit 22 is used to convert the main power supply circuit voltage into the working voltage of microcontroller 21. Crystal oscillator circuit 23 provides clock signal to microcontroller 21. Signal processing element 24 is an RC filter.

[0030] The crystal oscillator circuit 23 provides a stable clock signal for the microcontroller 21. The signal processing element 24 is an RC filter that filters the input signal to avoid signal interference that could lead to incorrect judgment. Voltage, current and temperature signals are input from the sensor module 1. The microcontroller 21 determines whether the set protection threshold is exceeded based on the acquired signal. If it is exceeded, a protection signal is output. The MOSFET control signal is output to the execution module 3. The relay control signal is amplified by a transistor and then output to the execution module 3.

[0031] The execution module 3 is communicatively connected to the central processor module 2. The execution module 3 includes a MOSFET fast cut-off circuit 31, a relay steady-state isolation circuit 32, a varistor 1 33, and a varistor 2 34. The central processor module 2 sends control signals to the execution module 3. The MOSFET fast cut-off circuit 31 is connected in series in the power input circuit. The relay steady-state isolation circuit 32 is connected in series with the rear end of the MOSFET fast cut-off circuit 31. The varistor 1 33 and the varistor 2 34 are connected in parallel in the input circuit.

[0032] The MOSFET fast-cut-off circuit 31 is a power MOSFET, such as IRF540N, used for fast-cut-off to prevent high voltage from impacting downstream equipment. The relay steady-state isolation circuit 32 is a relay, such as SRD-12VDC-SL-C, used for physical disconnection and isolation of the main circuit. Varistor 1 33 is used to absorb transient high voltage impacts, and varistor 2 34 is used for backup protection under continuous high voltage conditions. The MOSFET fast-cut-off circuit 31 is connected in series in the power input circuit as the main circuit breaking element. The relay steady-state isolation circuit 32 is connected in series with the downstream end of the MOSFET fast-cut-off circuit 31 as steady-state isolation protection. Varistor 1 33 and varistor 2 34 are connected in parallel in the input circuit to protect the circuit from high voltage impacts.

[0033] Auxiliary module 4; Auxiliary module 4 is used for remote monitoring and management.

[0034] The auxiliary module 4 includes a communication module 41, a display module 42, and an energy buffer module 43, wherein the energy buffer module 43 is a capacitor.

[0035] The display module 42 is an OLED screen, and the communication module is a WIFI module.

[0036] The communication module 41 is used for wireless communication and is connected to the UART of the central processor to transmit monitoring data. The energy buffer module 43 is a capacitor used to absorb transient high voltage energy and protect the back-end circuit. The capacitor is connected in parallel at the power input terminal.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A power input high voltage protection device, characterized by: include: Sensor module (1); The sensor module (1) is used to collect voltage, current and temperature signals of the power supply in real time; Central processor module (2); the central processor module (2) and the sensor module (1) are connected in communication, and the central processor module is responsible for signal processing; The execution module (3) is communicatively connected to the central processor module (2). The execution module (3) includes a MOSFET fast cut-off circuit (31), a relay steady-state isolation circuit (32), a varistor I (33), and a varistor II (34). The central processor module (2) sends control signals to the execution module (3). The MOSFET fast cut-off circuit (31) is connected in series in the power input circuit. The relay steady-state isolation circuit (32) is connected in series with the rear end of the MOSFET fast cut-off circuit (31). The varistor I (33) and the varistor II (34) are connected in parallel in the input circuit. Auxiliary module (4); the auxiliary module (4) is used for remote monitoring and management.

2. A power input high voltage protection device according to claim 1, characterized in that: The sensor module (1) includes a current sensor (11), a voltage sensor (12) and a temperature sensor (13), wherein the current sensor (11) is connected in series in the power input circuit.

3. A power input high voltage protection device according to claim 2, characterized in that: The central processor module (2) includes a microcontroller (21), a power supply circuit (22), a crystal oscillator circuit (23), and a signal processing element (24). The power supply circuit (22) is used to convert the main power supply circuit voltage into the operating voltage of the microcontroller (21), and the crystal oscillator circuit (23) provides a clock signal for the microcontroller (21).

4. A power input high voltage protection device according to claim 3, characterized in that: The signal processing element (24) is an RC filter.

5. The power input high voltage protection device of claim 1, wherein: The auxiliary module (4) includes a communication module (41), a display module (42) and an energy buffer module (43), wherein the energy buffer module (43) is a capacitor.

6. A power input high voltage protection device according to claim 5, characterized in that: The display module (42) is an OLED screen, and the communication module is a WIFI module.

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