DC surge protection module

Abstract

A direct current surge protection module is provided with a filter circuit and a surge control circuit, the filter circuit is provided with an input end, and the filter circuit is used for eliminating high-frequency interference signals of high-voltage direct current input into the filter circuit; high-frequency interference signals of direct-current input voltage can be filtered out through the filter circuit, then the direct-current input voltage is transmitted to the surge control circuit, surge over-voltage and under-voltage control is completed by means of the surge control circuit in cooperation with a triode Q1, a triode Q2 and a sampling resistor R1, and auxiliary 24V power supply is directly output through a reverse connection prevention function and an overcurrent protection function.

Description

Technical Field

[0001] The utility model relates to a protection module, in particular to a DC surge protection module. Background Art

[0002] A large part of electronic product failures are caused by transients and surges. Voltage transients and surges are everywhere. Power grids, lightning strikes, explosions, and even people walking on carpets can generate tens of thousands of volts of electrostatic induction voltage, which are invisible and fatal killers of electronic products. Therefore, in order to improve the reliability of electronic products and the safety of the human body, protective measures must be taken against voltage transients and surges. Protection modules can be installed on electronic products to protect against current surges.

[0003] In the prior art: CN201611250570.1 Surge protection circuit, the present invention discloses a surge protection circuit, which relates to the technical field of emergency protection circuit devices for limiting overvoltage without cutting off the circuit. The surge protection circuit includes a surge suppression circuit and a voltage division matching circuit, and the surge suppression circuit includes a clamp-type surge protection device and a switch-type surge protection device. One end of the clamp-type surge protection device is a connection terminal of the protection circuit, and the other end of the clamp-type surge protection device is connected to one end of the switch-type surge protection device. The other end of the switch-type surge protection device is another connection terminal of the protection circuit. The voltage division matching circuit includes voltage division matching resistors R1 and R2, and the resistor R1 is connected in parallel with the clamp-type surge protection device, and the resistor R2 is connected in parallel with the switch-type surge protection device.

[0004] Although the circuit in the prior art reduces the residual voltage of the whole machine during surge impact, effectively ensuring the environmental adaptability of the circuit, thereby optimizing the cost of the whole machine, the protection module in the prior art is unable to perform undervoltage control. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a DC surge protection module.

[0006] The utility model is implemented by the following technical solutions: a DC surge protection module is provided with a filter circuit and a surge control circuit;

[0007] The filter circuit is provided with an input terminal, and the filter circuit is used to eliminate high-frequency interference signals from the high-voltage direct current input into the filter circuit;

[0008] The surge control circuit performs pre-protection on the current generated in the circuit, prevents the surge current exceeding the normal value, and ensures the normal operation of the protection module;

[0009] The surge control circuit is provided with a dual amplification output, and the dual amplification transmission adopts two triodes, which are marked as triode No. 1 Q1 and triode No. 2 Q2;

[0010] A sampling component is provided on one side of the first transistor Q1 and the second transistor Q2, and the sampling component adopts a sampling resistor.

[0011] A plurality of output terminals are arranged next to the surge control circuit;

[0012] The output end is divided into a main output end and an output end, and an output end is arranged on one side of the main output end;

[0013] A resistance component is provided between the surge control circuit and the output end;

[0014] The resistor components are divided into resistor No. 1, resistor No. 2, resistor No. 3 and resistor No. 4;

[0015] The resistor No. 1 is recorded as R2, the resistor No. 2 is recorded as R3, the resistor No. 3 is recorded as R4, and the resistor No. 4 is recorded as R5;

[0016] A transistor is arranged between the second resistor R3 and the fourth resistor R5, and the transistor is marked as Q3. A transistor Q4 is arranged below the transistor Q3.

[0017] Compared with the prior art, the utility model utilizes a filtering circuit to filter out high-frequency interference signals from the DC input voltage and then passes it to the surge control circuit. At the same time, the surge control circuit cooperates with transistors Q1, Q2 and sampling resistor R1 to complete surge over-voltage and under-voltage control, reverse connection protection and overcurrent protection functions to directly output an auxiliary 24V power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a partial enlarged view of the utility model;

[0020] Figure 3 It is a partial enlarged view of the utility model;

[0021] In the figure: 1 is the filter circuit, 2 is the surge control circuit, 3 is the input end, 4 is the sampling resistor, 5 is the main output end, 6 is the output end, and 7 is the resistor component. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0023] A DC surge protection module is provided with a filter circuit 1 and a surge control circuit 2;

[0024] The filter circuit 1 is provided with an input terminal 3, and the filter circuit 1 is used to eliminate high-frequency interference signals from the high-voltage direct current input into the filter circuit 1;

[0025] The surge control circuit 2 performs pre-protection on the current generated in the circuit, prevents the surge current exceeding the normal value, and ensures the normal operation of the protection module;

[0026] The surge control circuit 2 is provided with a dual amplification output, and the dual amplification transmission adopts two triodes, which are marked as triode No. 1 Q1 and triode No. 2 Q2;

[0027] A sampling component is provided on one side of the first transistor Q1 and the second transistor Q2, and the sampling component adopts a sampling resistor 4, and the sampling resistor 4 is recorded as R1;

[0028] The surge control circuit 2 is provided with a first transistor Q1, a second transistor Q2 and a sampling resistor R1. The mutual cooperation between the three enables the surge control circuit 2 to achieve the functions of surge over-voltage and under-voltage control, reverse connection protection and over-current protection, and finally directly outputs the auxiliary 24V power supply.

[0029] A plurality of output terminals are arranged next to the surge control circuit 2;

[0030] The output end is divided into a main output end 5 and an output end 6, and the output end 6 is arranged on one side of the main output end 5;

[0031] A resistor component 7 is provided between the surge control circuit and the output end;

[0032] The resistor component 7 is divided into a first resistor, a second resistor, a third resistor and a fourth resistor;

[0033] The resistor No. 1 is recorded as R2, the resistor No. 2 is recorded as R3, the resistor No. 3 is recorded as R4, and the resistor No. 4 is recorded as R5;

[0034] A transistor is arranged between the second resistor R3 and the fourth resistor R5, and the transistor is marked as Q3. A transistor Q4 is arranged below the transistor Q3.

[0035] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A DC surge protection module, characterized in that: A filter circuit and a surge control circuit are provided; The filter circuit is provided with an input terminal, and the filter circuit is used to eliminate high-frequency interference signals from the high-voltage direct current input into the filter circuit; The surge control circuit performs pre-protection on the current generated in the circuit, prevents the surge current exceeding the normal value, and ensures the normal operation of the protection module; The surge control circuit is provided with a dual amplification output, and the dual amplification transmission adopts two triodes, which are marked as triode No. 1 Q1 and triode No. 2 Q2; A sampling component is provided on one side of the first transistor Q1 and the second transistor Q2, and the sampling component adopts a sampling resistor.

2. A DC surge protection module according to claim 1, characterized in that: A plurality of output terminals are arranged next to the surge control circuit; The output end is divided into a main output end and an output end, and an output end is arranged on one side of the main output end; A resistance component is arranged between the surge control circuit and the output end.

3. A DC surge protection module according to claim 2, characterized in that: The resistor components are divided into resistor No. 1, resistor No. 2, resistor No. 3 and resistor No. 4; The resistor No. 1 is recorded as R2, the resistor No. 2 is recorded as R3, the resistor No. 3 is recorded as R4, and the resistor No. 4 is recorded as R5.

4. A DC surge protection module according to claim 3, characterized in that: A transistor is arranged between the second resistor R3 and the fourth resistor R5, and the transistor is marked as Q3. A transistor Q4 is arranged below the transistor Q3.

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