CN219329609U - Surge protection circuit of mining base station controller - Google Patents
Surge protection circuit of mining base station controller Download PDFInfo
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- CN219329609U CN219329609U CN202223054440.4U CN202223054440U CN219329609U CN 219329609 U CN219329609 U CN 219329609U CN 202223054440 U CN202223054440 U CN 202223054440U CN 219329609 U CN219329609 U CN 219329609U
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Abstract
The utility model relates to the technical field of circuits, in particular to a surge protection circuit of a mining base station controller, which comprises a first protection circuit and a second protection circuit, wherein the first protection circuit is electrically connected with the second protection circuit, the first protection circuit is used for rectifying and protecting the circuit and comprises a pi-type filter and a rectifier bridge, the output end of the pi-type filter is connected with the rectifier bridge in series, the second protection circuit is used for absorbing high-frequency surge impact and comprises a field effect tube and a voltage stabilizing tube, and the voltage stabilizing tube is connected between the grid electrode and the source electrode of the field effect tube. The first protection circuit comprises a self-recovery fuse and a pi-type filter, and the self-recovery fuse protects the circuit when the circuit is in fault or overload; the pi-type filter reduces the ripple fed back to the input end by the power supply, filters out high-frequency peaks and helps the surge protection process. The second protection circuit protects the surge condition, and the power supply surge is protected jointly through the two protection circuits.
Description
Technical Field
The utility model relates to the technical field of circuits, in particular to a surge protection circuit of a mining base station controller.
Background
A peak current or an overload current, which is much larger than the steady state current of the circuit, is generated at the moment of the circuit power-on or in case of an abnormality of the circuit, which is called a surge. Surge can bring about catastrophic damage and accumulated damage, and if a surge voltage exceeds the bearing capacity of the equipment, the equipment is completely destroyed or the service life is greatly reduced; the cumulative effect of multiple small surges can lead to performance degradation, equipment failure, and reduced equipment life, ultimately resulting in downtime or reduced productivity of the semiconductor device. While the consequences of the circuitry relying on mining base station communications downhole are even more immeasurable due to surge accumulation. In the prior art, the protection device adopted by the surge protection circuit is usually a low-voltage type piezoresistor or a transient voltage diode, which can introduce a ground loop problem in the use process, so that the protection device and equipment are damaged.
Disclosure of Invention
The utility model aims to solve the defects in the background technology by providing a mining base station controller surge protection circuit.
The technical scheme adopted by the utility model is as follows:
the mining base station controller surge protection circuit comprises a first protection circuit and a second protection circuit, wherein the first protection circuit is electrically connected with the second protection circuit, the first protection circuit is used for rectifying and protecting the circuit and comprises a pi-type filter and a rectifier bridge, the output end of the pi-type filter is connected with the rectifier bridge in series, the second protection circuit is used for absorbing high-frequency surge impact and comprises a field effect tube and a voltage stabilizing tube, and the voltage stabilizing tube is connected between the grid electrode and the source electrode of the field effect tube.
As a preferred technical scheme of the utility model: the first protection circuit is also connected in series with a self-recovery fuse.
As a preferred technical scheme of the utility model: in the first protection circuit, a self-recovery fuse is connected with a pi-type filter and then connected with a first end and a second end of a rectifier bridge; the pi-type filter comprises a double-hole inductor L, and a first capacitor and a second capacitor which are respectively connected in parallel with an input end and an output end of the double-hole inductor, wherein the inductor L is 8801 double-hole inductor, and the first capacitor and the second capacitor are MKP62222K275 ampere capacitors.
As a preferred technical scheme of the utility model: the second protection circuit comprises four resistors from the first resistor to the fourth resistor, two diodes, three capacitors from the third capacitor to the fifth capacitor and a field effect transistor, wherein the first resistor is 1KΩ, the second resistor is 240KΩ, the third resistor is 10Ω, the fourth resistor is 270 Ω, the third capacitor is 1 μF, and the fourth capacitor is 0.01 μF; the first resistor and the second resistor are respectively connected with the third end and the fourth end of the rectifier bridge, the other end of the first resistor is respectively connected with the third capacitor and the cathode of the first diode, the other end of the third capacitor is connected with the drain electrode of the field effect tube, the anode of the first diode is respectively connected with the cathode of the second diode, the other end of the second resistor, the third resistor and the fourth resistor, the anode of the second diode is connected with the drain electrode of the field effect tube, the other end of the third resistor is connected with the grid electrode of the field effect tube, the other end of the fourth resistor is connected with the fourth capacitor, the other end of the fourth capacitor is connected with the source electrode of the field effect tube, and the drain electrode of the field effect tube is grounded.
As a preferred technical scheme of the utility model: the second diode is a zener diode.
As a preferred technical scheme of the utility model: the field effect transistor is an N-channel depletion type.
As a preferred technical scheme of the utility model: and the output end of the second protection circuit is connected in parallel with a fifth capacitor, and the fifth capacitor is 0.01 mu F.
Compared with the prior art, the surge protection circuit of the mining base station controller has the beneficial effects that:
the surge protection circuit of the mining base station controller provided by the utility model comprises the self-recovery fuse and the pi-type filter, wherein the self-recovery fuse protects the circuit when the circuit is in fault or overload; the pi-type filter reduces the ripple fed back to the input end by the power supply, filters out high-frequency peaks and helps the surge protection process. The second protection circuit protects the surge condition, and the power supply surge is protected jointly through the two protection circuits.
Drawings
Fig. 1 is a surge protection circuit diagram of a preferred embodiment of the present utility model.
Detailed Description
It should be noted that, under the condition of no conflict, the embodiments of the present embodiments and features in the embodiments may be combined with each other, and the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and obviously, the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, a preferred embodiment of the present utility model provides a surge protection circuit of a mining base station controller, including a first protection circuit and a second protection circuit, where the first protection circuit is electrically connected to the second protection circuit, the first protection circuit is used for rectifying and protecting the circuit, including a pi-type filter and a rectifier bridge, an output end of the pi-type filter is connected in series with the rectifier bridge, and the second protection circuit is used for absorbing high-frequency surge impact, including a field effect transistor and a voltage regulator, and the voltage regulator is connected between a gate and a source of the field effect transistor.
The first protection circuit forms a first protection for the circuit through the pi-shaped filter, is connected to the second protection circuit, and protects the circuit again through the field effect transistor in the second protection circuit.
The first protection circuit is also connected in series with a self-recovery fuse.
The self-restoring fuse is changed into a high-resistance state when a short circuit or overload occurs in the circuit, so that the working current is rapidly reduced, and the circuit is limited and protected.
In the first protection circuit, a self-recovery fuse is connected with a pi-type filter and then connected with a first end and a second end of a rectifier bridge; the pi-type filter comprises a double-hole inductor L, and a first capacitor and a second capacitor which are respectively connected in parallel with an input end and an output end of the double-hole inductor, wherein the inductor L is 8801 double-hole inductor, and the first capacitor and the second capacitor are MKP62222K275 ampere capacitors.
The pi-type filter can reduce the ripple of the power supply fed back to the input end, can filter high-frequency spikes when surge signals arrive, and can be converted into a high-resistance state when a circuit is short-circuited or overloaded, so that the working current is rapidly reduced, and the circuit is limited and protected. After the fault is removed, the self-recovery fuse can be recovered to a low-resistance state, so that the circuit returns to a normal working state. The rectifier bridge stabilizes the current input to the circuit. And safety capacitors which are MKP62222K275 are used, so that the stability of the pi-type filter and the circuit is ensured.
The second protection circuit comprises four resistors from the first resistor to the fourth resistor, two diodes, three capacitors from the third capacitor to the fifth capacitor and a field effect transistor, wherein the first resistor is 1KΩ, the second resistor is 240KΩ, the third resistor is 10Ω, the fourth resistor is 270 Ω, the third capacitor is 1 μF, and the fourth capacitor is 0.01 μF; the first resistor and the second resistor are respectively connected with the third end and the fourth end of the rectifier bridge, the other end of the first resistor is respectively connected with the third capacitor and the cathode of the first diode, the other end of the third capacitor is connected with the drain electrode of the field effect tube, the anode of the first diode is respectively connected with the cathode of the second diode, the other end of the second resistor, the third resistor and the fourth resistor, the anode of the second diode is connected with the drain electrode of the field effect tube, the other end of the third resistor is connected with the grid electrode of the field effect tube, the other end of the fourth resistor is connected with the fourth capacitor, the other end of the fourth capacitor is connected with the source electrode of the field effect tube, and the drain electrode of the field effect tube is grounded.
The second diode is a zener diode.
The field effect transistor is an N-channel depletion type.
And the output end of the second protection circuit is connected in parallel with a fifth capacitor, and the fifth capacitor is 0.01 mu F.
The voltage stabilizing diode is used for limiting the gate source voltage of the MOS tube, and the first resistor, the third capacitor and the first diode which are 1KΩ and 1 μF are used for ensuring that the MOS tube keeps an off state when the MOS tube is just electrified. After power-on, the grid voltage of the MOS tube is gradually increased, when the grid source voltage is high to a certain degree, the first diode is conducted, all charges charge the third capacitor, the grid source voltage rises at the same speed, and the MOS tube is conducted to generate impulse current.
In this embodiment, the self-recovery fuse is connected to the power supply terminal, and then connected to a pi-type filter composed of a capacitor C1, a dual-hole inductor L and a capacitor C2, where C1 and C2 are respectively connected in parallel with the input terminal and the output terminal of the dual-hole inductor L, and then connected to the first terminal and the second terminal of the rectifier bridge T to form a first protection circuit, the inductor L is 8801 dual-hole inductor, and C1 and C2 are MKP62222K275 safety capacitors. The pi-type filter can reduce the ripple of the power supply fed back to the input end, can filter high-frequency spikes when surge signals arrive, and can be converted into a high-resistance state when a circuit is short-circuited or overloaded, so that the working current is rapidly reduced, and the circuit is limited and protected. After the fault is removed, the self-recovery fuse can be recovered to a low-resistance state, so that the circuit returns to a normal working state.
The resistor R1 is connected with the third end of the rectifier bridge T, the other end of the resistor R1 is respectively connected with the cathode of the diode D1 and the capacitor C3, the other end of the capacitor C3 is connected with the drain electrode of the MOS tube, the anode of the diode D1 is respectively connected with the cathode of the voltage stabilizing diode D2, the resistor R3 and the resistor R4, the other end of the resistor R2 is connected with the fourth end of the rectifier bridge T, the other end of the resistor R3 is connected with the grid electrode of the MOS tube, the other end of the resistor R4 is connected with the source electrode of the MOS tube, and the capacitor C5 is respectively connected with the fourth end of the rectifier bridge T and the source electrode of the MOS tube. Wherein, R1 resistance is 1KΩ, R2 resistance is 240KΩ, R3 resistance is 10Ω, R4 resistance is 270 Ω, C3 is 1 μF capacitance, C4 is 0.01 μF capacitance, and C5 is 0.01 μF capacitance.
The voltage stabilizing diode D2 is used for limiting the gate-source voltage of the MOS transistor, and the R1, the C3 and the D1 are used for ensuring that the MOS transistor is kept in an off state when the MOS transistor is just electrified. After power-on, the grid voltage of the MOS tube is gradually increased, when the grid source voltage is high to a certain degree, the diode D1 is conducted, all charges charge the capacitor C3, the grid source voltage is increased at the same speed, and the MOS tube is conducted to generate impulse current.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (7)
1. Mining base station controller surge protection circuit, including first protection circuit and second protection circuit, its characterized in that: the first protection circuit is electrically connected with the second protection circuit, the first protection circuit is used for rectifying and protecting the circuit and comprises a pi-type filter and a rectifier bridge, the output end of the pi-type filter is connected with the rectifier bridge in series, the second protection circuit is used for absorbing high-frequency surge impact and comprises a field effect tube and a voltage stabilizing tube, and the voltage stabilizing tube is connected between the grid electrode and the source electrode of the field effect tube.
2. The mining base station controller surge protection circuit of claim 1, wherein: the first protection circuit is also connected in series with a self-recovery fuse.
3. The mining base station controller surge protection circuit of claim 2, wherein: in the first protection circuit, a self-recovery fuse is connected with a pi-type filter and then connected with a first end and a second end of a rectifier bridge; the pi-type filter comprises a double-hole inductor L, and a first capacitor and a second capacitor which are respectively connected in parallel with an input end and an output end of the double-hole inductor, wherein the inductor L is 8801 double-hole inductor, and the first capacitor and the second capacitor are MKP62222K275 safety capacitor.
4. A mining base station controller surge protection circuit according to claim 3, wherein: the second protection circuit comprises four resistors from the first resistor to the fourth resistor, two diodes, three capacitors from the third capacitor to the fifth capacitor and a field effect transistor, wherein the first resistor is 1KΩ, the second resistor is 240KΩ, the third resistor is 10Ω, the fourth resistor is 270 Ω, the third capacitor is 1 μF, and the fourth capacitor is 0.01 μF; the first resistor and the second resistor are respectively connected with the third end and the fourth end of the rectifier bridge, the other end of the first resistor is respectively connected with the third capacitor and the cathode of the first diode, the other end of the third capacitor is connected with the drain electrode of the field effect tube, the anode of the first diode is respectively connected with the cathode of the second diode, the other end of the second resistor, the third resistor and the fourth resistor, the anode of the second diode is connected with the drain electrode of the field effect tube, the other end of the third resistor is connected with the grid electrode of the field effect tube, the other end of the fourth resistor is connected with the fourth capacitor, the other end of the fourth capacitor is connected with the source electrode of the field effect tube, and the drain electrode of the field effect tube is grounded.
5. The mining base station controller surge protection circuit of claim 4, wherein: the second diode is a zener diode.
6. The mining base station controller surge protection circuit of claim 5, wherein: the field effect transistor is an N-channel depletion type.
7. The mining base station controller surge protection circuit of claim 6, wherein: and the output end of the second protection circuit is connected in parallel with a fifth capacitor, and the fifth capacitor is 0.01 mu F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054440.4U CN219329609U (en) | 2022-11-17 | 2022-11-17 | Surge protection circuit of mining base station controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223054440.4U CN219329609U (en) | 2022-11-17 | 2022-11-17 | Surge protection circuit of mining base station controller |
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| Publication Number | Publication Date |
|---|---|
| CN219329609U true CN219329609U (en) | 2023-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223054440.4U Active CN219329609U (en) | 2022-11-17 | 2022-11-17 | Surge protection circuit of mining base station controller |
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| Country | Link |
|---|---|
| CN (1) | CN219329609U (en) |
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2022
- 2022-11-17 CN CN202223054440.4U patent/CN219329609U/en active Active
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