A self-adaptive protection power supply circuit

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By adding dual op amp circuits to the protection power supply circuit, the problems of load malfunction, undervoltage tripper suction and abnormal system opening in the prior art are solved, and precise control and stable output voltage are achieved for the input voltage, improving the stability and reliability of the system.

CN222735795UActive Publication Date: 2025-04-08XIAMEN LEELEN HIGH VOLTAGE ELECTRIC CO LTD

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Patent Information

Application Number: CN202420837928.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-04-22
Publication Date: 2025-04-08
Estimated Expiration: 2034-04-22

AI Technical Summary

Technical Problem

When the existing protective power supply technology faces a brief fluctuation of the grid voltage, it leads to load malfunction, unstable suction and closing of the undervoltage tripper, and abnormal system opening.

Method used

An adaptively adjustable protection power supply circuit is designed, using input circuits, input control circuits, energy storage circuits, voltage stabilization circuits and output circuits, and a dual op amp circuit is added to ensure the stable output threshold, the voltage drop is reduced, and the voltage stabilization power supply is established in a timely manner to eliminate load malfunction abnormalities.

Benefits of technology

It realizes precise control of the input voltage and stabilizes the output voltage, reduces the short-term abnormal voltage fluctuations of the system, and improves the stability and reliability of the system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of protective power supply, and discloses a protective power supply circuit with adaptive adjustment, which includes: an input circuit, an input control circuit, an energy storage circuit, a voltage stabilizing circuit and an output circuit, wherein the power input end of the input circuit is connected to an external power supply, the power output end of the input circuit is connected to the power input end of the energy storage circuit, the power output end of the energy storage circuit is connected to the power input end of the voltage stabilizing circuit, the power output end of the voltage stabilizing circuit is connected to one end of the power input end of the output circuit, the control end of the input circuit is connected to the control end of the input control circuit, the output end of the input control circuit is connected to the other end of the power input end of the output circuit, and the power output end of the output circuit is connected to an external power supply. The circuit adopts the input circuit, the input control circuit, the energy storage circuit, the voltage stabilizing circuit and the output circuit, and can realize the addition of a dual operational amplifier circuit, so that the output threshold is stable, the voltage drop is reduced, the voltage stabilizing power supply is established in time, and the abnormal load misoperation is eliminated.

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Description

Technical Field

[0001] The utility model relates to the technical field of protective power supplies, in particular to a protective power supply circuit with adaptive regulation. Background Art

[0002] The voltage in the power grid may fluctuate for a short period of time due to various reasons, such as overload, fault switching or start / stop of remote high-power equipment. If a short voltage drop causes unnecessary circuit breaker tripping, the stability and continuity of the system will be seriously affected.

[0003] There are some problems with the solutions currently available on the market, such as Figure 4 As shown, Problem 1: The power supply VCC provides power for the operational amplifier chip. When the voltage stored in capacitor C9 is lower than the voltage value required to be established by VCC, if the input power supply voltage is lower than the set output start-up threshold, the product will start abnormally, causing the load to be energized, and then causing abnormal operation of the circuit breaker; This is because the VCC power supply is not established in time during the charging process of capacitor C9, which makes it impossible for the operational amplifier chip to correctly judge the voltage, thus causing output abnormality; Problem 2: For low-voltage models (24V, 30V, 48V, 60V), because the load current is large, a higher voltage drop will occur during startup, which will affect the voltage at the moment of load startup, making it lower than the pull-in threshold of the undervoltage release, causing the set value to be exceeded. In addition, unstable pull-in may also cause the undervoltage release to fail to pull in successfully, etc.

[0004] Therefore, in view of the above problems, the existing protection power supply technology needs to be further improved. Utility Model Content

[0005] The purpose of the utility model is to solve the existing technical problems: insufficient delay accuracy; the voltage drop of low-voltage models causes the load to be critical and the pull-in is unstable; when the capacitor does not store energy, during the product boost process, when the input voltage does not reach the threshold, the abnormal output power supply causes the load to malfunction, etc. Through the rational design of the protection power supply technology, the input circuit, input control circuit, energy storage circuit, voltage stabilization circuit and output circuit are adopted, and the dual op amp circuit can be added to stabilize the output threshold, reduce the voltage drop, establish the voltage stabilization power supply in time, eliminate the abnormal load malfunction, etc. It can effectively eliminate the short-term abnormal voltage fluctuation of the system, reduce the abnormal tripping of the system, and improve the stability of the system, so as to provide the best protection for the equipment.

[0006] The technical solution of the utility model is as follows:

[0007] A protective power supply circuit with adaptive regulation, the protective power supply circuit comprising: an input circuit, an input control circuit, an energy storage circuit, a voltage stabilizing circuit and an output circuit, the power input end of the input circuit is connected to an external power supply, the power output end of the input circuit is connected to the power input end of the energy storage circuit, the power output end of the energy storage circuit is connected to the power input end of the voltage stabilizing circuit, the power output end of the voltage stabilizing circuit is connected to one end of the power input end of the output circuit, the control end of the input circuit is connected to the control end of the input control circuit, the output end of the input control circuit is connected to the other end of the power input end of the output circuit, and the power output end of the output circuit is connected to external power supply.

[0008] Furthermore, the input control circuit includes a primary control circuit and a secondary control circuit, the control end of the primary control circuit is connected to the control end of the input circuit, the output end of the primary control circuit is connected to the input end of the secondary control circuit, and the output end of the secondary control circuit is connected to the other end of the power input end of the output circuit.

[0009] Further, the input circuit includes a power interface, a resistor RX, a diode D15, a diode D7, a diode D17, a voltage regulator DZ5 and an NMOS tube Q1. The input end of the power interface is externally connected to an external power supply, the positive output end of the power interface is connected in parallel to the positive electrode of the diode D15 and the positive electrode of the diode D7, the negative electrode of the diode D15 is connected to the power input end of the energy storage circuit, the negative electrode of the diode D7 is respectively connected to one end of the resistor RX, the drain of the NMOS tube Q1 and the control end of the input control circuit, the other end of the resistor RX is connected in parallel to the gate of the NMOS tube Q1 and the negative electrode of the voltage regulator DZ5, the positive electrode of the voltage regulator DZ5 is connected in parallel to the source of the NMOS tube Q1 and the positive electrode of the diode D17, the negative electrode of the diode D17 is connected to the other end of the power input end of the energy storage circuit, and the negative output end of the power interface is grounded.

[0010] Furthermore, the resistor RX includes a resistor R3, a resistor R4 and a resistor R5, one end of the resistor R4 is connected to the cathode of the diode D7, the other end of the resistor R4 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the gate of the NMOS tube Q1.

[0011] Furthermore, the energy storage circuit includes a diode D16 and a capacitor C9, the cathode of the diode D16 is connected to one end of the power output end of the input circuit, the anode of the diode D16 is connected in parallel to the other end of the power output end of the input circuit and one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

[0012] Furthermore, the capacitor C9 is an electrolytic capacitor, that is, the anode of the diode D16 is connected in parallel to the other end of the power output end of the input circuit and the anode of the capacitor C9, and the cathode of the capacitor C9 is grounded.

[0013] Furthermore, the voltage stabilizing circuit includes a diode D5, a resistor RM, an NMOS tube Q2, a voltage stabilizing tube DZ6, a resistor R24, a voltage stabilizing tube DZ9 and a capacitor C3, the positive electrode of the diode D5 is connected to the power output end of the energy storage circuit, the negative electrode of the diode D5 is connected in parallel to one end of the resistor RM and the drain of the NMOS tube Q2, the other end of the resistor RM is connected in parallel to the gate of the NMOS tube Q2 and the negative electrode of the voltage stabilizing tube DZ6, the positive electrode of the voltage stabilizing tube DZ6 is grounded, the source of the NMOS tube Q2 is connected to one end of the resistor R24, the other end of the resistor R24 is connected in parallel to the negative electrode of the voltage stabilizing tube DZ9 and one end of the capacitor C3, and the positive electrode of the voltage stabilizing tube DZ9 and the other end of the capacitor C3 are grounded.

[0014] Furthermore, the resistor RM includes a resistor R6 and a resistor R7, the cathode of the diode D5 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the gate of the NMOS tube Q2.

[0015] Furthermore, the capacitor C3 is an electrolytic capacitor, that is, the other end of the resistor R24 is connected to the positive electrode of the capacitor C3, and the negative electrode of the capacitor C3 is grounded.

[0016] Furthermore, the primary control circuit includes a resistor RN, a resistor R19, a diode D18, a resistor R12, a resistor R13, a resistor R14, an amplifier U1A, an NMOS tube Q4, a resistor R15 and a diode D14, one end of the resistor RN is connected to the control end of the input circuit, the other end of the resistor RN is connected in parallel to one end of the resistor R19, the positive electrode of the diode D18 and the positive input end of the amplifier U1A, and the negative input end of the amplifier U1A is connected in parallel to one end of the resistor R12, one end of the resistor R13 and the resistor The cathode of the diode D18 is connected to the DC power supply, the other end of the resistor R14 is connected to the drain of the NMOS tube Q4, the source of the NMOS tube Q4 is grounded, the gate of the NMOS tube Q4 is connected to one end of the resistor R15, the other end of the resistor R15 is connected in parallel to the output end of the amplifier U1A and the anode of the diode D14, and the cathode of the diode D14 is connected to the input end of the secondary control circuit.

[0017] Furthermore, the resistor RN includes a resistor R20, a resistor R21, a resistor R22 and a resistor R23, one end of the resistor R20 is connected to the control end of the input circuit, the other end of the resistor R20 is connected to one end of the resistor R21, the other end of the resistor R21 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to the positive electrode of the diode D18.

[0018] Furthermore, the secondary control circuit includes a resistor R16, a resistor R18, a capacitor C2, a potentiometer RP1, a voltage regulator DZ13, a resistor R11, an amplifier U1B, a resistor R10, a resistor R9 and an NMOS tube Q3. The output end of the primary control circuit is connected to one end of the resistor R16, the other end of the resistor R16 is connected in parallel to one end of the resistor R18, one end of the capacitor C2 and one end of the potentiometer RP1, the other end of the resistor R18 and the other end of the capacitor C2 are grounded, and the other end of the potentiometer RP1 is connected to the amplifier U1B. 1B positive input end, the negative input end of the amplifier U1B is connected in parallel to the negative electrode of the voltage regulator tube DZ13 and one end of the resistor R11, the positive electrode of the voltage regulator tube DZ13 is grounded, and the other end of the resistor R11 is connected to a DC power supply, the output end of the amplifier U1B is connected to one end of the resistor R10, and the other end of the resistor R10 is connected in parallel to one end of the resistor R9 and the gate of the NMOS tube Q3, the source of the NMOS tube Q3 and the other end of the resistor R9 are grounded, and the drain of the NMOS tube Q3 is connected to the other end of the power input end of the output circuit.

[0019] Furthermore, the capacitor C2 is an electrolytic capacitor, that is, the other end of the resistor R16 is connected to the positive electrode of the capacitor C2, and the negative electrode of the capacitor C2 is grounded.

[0020] Furthermore, the output circuit includes an output interface, and the output interface is respectively connected to the power output end of the voltage stabilizing circuit and the output end of the input control circuit.

[0021] Beneficial Effects

[0022] The utility model adopts the input circuit, input control circuit, energy storage circuit, voltage stabilizing circuit and output circuit through the rational design of the protection power supply technology, and can realize the addition of dual operational amplifier circuit, stabilize the output threshold, reduce the voltage drop, establish the voltage stabilizing power supply in time, eliminate the abnormal load misoperation, etc. The specific effects are as follows:

[0023] 1. Accurately control input voltage: Through the configuration of multi-stage op amps, the circuit can accurately judge and respond to changes in input voltage, ensuring that the load is powered only when the input voltage reaches the set threshold;

[0024] 2. Stable output voltage: By using the interaction between op amp U1A and op amp U1B, the circuit can output VCC voltage stably, ensuring the normal operation of the load;

[0025] 3. Delay control and flexibility: Through the combination of capacitor C2 and adjustable resistor R18, the circuit realizes the delay function, which not only ensures the accuracy of time control, but also provides adjustment flexibility to adapt to different application requirements;

[0026] 4. Cost-effectiveness: By reducing the reliance on high-specification timing capacitors, the circuit design reduces costs and also simplifies the circuit complexity.

[0027] In general, this design takes into account performance, stability, flexibility and cost-effectiveness, and provides an excellent solution for achieving efficient and reliable voltage control. Through this multi-stage op amp design, the circuit can not only ensure the stability of the turn-on voltage of transistor Q3 and avoid it being in a weak conduction state, but also reduce the parameter requirements for the timing capacitor, including withstand voltage and capacitance, thereby achieving cost savings. This design not only improves the reliability of the circuit, but also enhances its flexibility and economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The utility model is a structural schematic diagram of a self-adaptive regulating protection power supply circuit.

[0029] Figure 2 The utility model is a circuit 1 schematic diagram of a self-adaptive regulating protection power supply circuit.

[0030] Figure 3 It is a schematic diagram of circuit 2 of a self-adaptive regulating protection power supply circuit of the utility model.

[0031] Figure 4 FIG. 1 is a schematic diagram of an existing protection power supply circuit.

[0032] Figure numbers: 01, input circuit; 02, input control circuit; 03, output circuit; 04, energy storage circuit; 05, voltage stabilizing circuit. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-Figure 3As shown, the utility model provides an adaptively adjustable protection power supply circuit, which includes: an input circuit 01, an input control circuit 02, an energy storage circuit 04, a voltage stabilizing circuit 05 and an output circuit 03, wherein the power input end of the input circuit 01 is connected to an external power supply, the power output end of the input circuit 01 is connected to the power input end of the energy storage circuit 04, the power output end of the energy storage circuit 04 is connected to the power input end of the voltage stabilizing circuit 05, the power output end of the voltage stabilizing circuit is connected to one end of the power input end of the output circuit 03, the control end of the input circuit 01 is connected to the control end of the input control circuit 02, the output end of the input control circuit 02 is connected to the other end of the power input end of the output circuit 03, and the power output end of the output circuit 03 is connected to an external power supply;

[0035] The input control circuit 02 includes a primary control circuit and a secondary control circuit, the control end of the primary control circuit is connected to the control end of the input circuit 01, the output end of the primary control circuit is connected to the input end of the secondary control circuit, and the output end of the secondary control circuit is connected to the other end of the power input end of the output circuit 03;

[0036] Among them, the input circuit 01 includes a power supply interface, a resistor RX, a diode D15, a diode D7, a diode D17, a voltage regulator DZ5 and an NMOS tube Q1, the resistor RX includes resistors R3, R4 and R5, the energy storage circuit 04 includes a diode D16 and a capacitor C9, the voltage regulator circuit 05 includes a diode D5, a resistor RM, an NMOS tube Q2, a voltage regulator DZ6, a resistor R24, a voltage regulator DZ9 and a capacitor C3, the resistor RM includes resistors R6 and R7, and the primary control circuit includes a resistor R N, resistor R19, diode D18, resistor R12, resistor R13, resistor R14, amplifier U1A, NMOS tube Q4, resistor R15 and diode D14, resistor RN includes resistor R20, resistor R21, resistor R22 and resistor R23, secondary control circuit includes resistor R16, resistor R18, capacitor C2, potentiometer RP1, voltage regulator tube DZ13, resistor R11, amplifier U1B, resistor R10, resistor R9 and NMOS tube Q3, output circuit 03 includes output interface;

[0037] Among them, the input end of the power interface in the input circuit 01 is externally connected to an external power supply, the positive output end of the power interface is connected in parallel to the positive electrode of the diode D15 and the positive electrode of the diode D7, the negative electrode of the diode D15 is connected to the negative electrode of the diode D16 of the energy storage circuit 04, the negative electrode of the diode D7 is respectively connected to one end of the resistor RX, the drain of the NMOS tube Q1 and one end of the resistor R20 of the input control circuit 02, the other end of the resistor RX is connected in parallel to the gate of the NMOS tube Q1 and the negative electrode of the voltage regulator tube DZ5, the positive electrode of the voltage regulator tube DZ5 is connected in parallel to the source of the NMOS tube Q1 and the positive electrode of the diode D17, the negative electrode of the diode D17 is connected to the positive electrode of the diode D16 of the energy storage circuit 04, and the negative output end of the power interface is grounded;

[0038] The resistor RX includes a resistor R3, a resistor R4 and a resistor R5, one end of the resistor R4 is connected to the cathode of the diode D7, the other end of the resistor R4 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R5, and the other end of the resistor R5 is connected to the gate of the NMOS tube Q1;

[0039] The cathode of the diode D16 in the energy storage circuit 04 is connected to the cathode of the diode D15 of the input circuit 01, the anode of the diode D16 is connected in parallel to the cathode of the diode D17 of the input circuit 01 and the anode of the capacitor C9, and the cathode of the capacitor C9 is grounded; the capacitor C9 is an electrolytic capacitor;

[0040] Among them, the positive electrode of the diode D5 in the voltage stabilizing circuit 05 is connected to the negative electrode of the diode D16 of the energy storage circuit 04, the negative electrode of the diode D5 is connected in parallel to one end of the resistor RM and the drain of the NMOS tube Q2, the other end of the resistor RM is connected in parallel to the gate of the NMOS tube Q2 and the negative electrode of the voltage stabilizing tube DZ6, the positive electrode of the voltage stabilizing tube DZ6 is grounded, the source of the NMOS tube Q2 is connected to one end of the resistor R24, the other end of the resistor R24 is connected in parallel to the negative electrode of the voltage stabilizing tube DZ9 and the positive electrode of the capacitor C3, the positive electrode of the voltage stabilizing tube DZ9 and the negative electrode of the capacitor C3 are grounded; the capacitor C3 is selected as an electrolytic capacitor; the negative electrode of the voltage stabilizing tube DZ9 is used as the power supply VCC;

[0041] The resistor RM includes a resistor R6 and a resistor R7, the cathode of the diode D5 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the gate of the NMOS tube Q2;

[0042] Among them, one end of the resistor RN in the primary control circuit is connected to the cathode of the diode D7 of the input circuit 01, the other end of the resistor RN is connected in parallel to one end of the resistor R19, the anode of the diode D18 and the positive input end of the amplifier U1A, the negative input end of the amplifier U1A is connected in parallel to one end of the resistor R12, one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R12 is connected to the power supply VCC, the other end of the resistor R13 and the other end of the resistor R19 are grounded, the cathode of the diode D18 is connected to the power supply VCC, the other end of the resistor R14 is connected to the drain of the NMOS tube Q4, the source of the NMOS tube Q4 is grounded, the gate of the NMOS tube Q4 is connected to one end of the resistor R15, the other end of the resistor R15 is connected in parallel to the output end of the amplifier U1A and the anode of the diode D14, and the cathode of the diode D14 is connected to one end of the resistor R16 of the secondary control circuit;

[0043] The resistor RN includes a resistor R20, a resistor R21, a resistor R22 and a resistor R23, one end of the resistor R20 is connected to the control end of the input circuit 01, the other end of the resistor R20 is connected to one end of the resistor R21, the other end of the resistor R21 is connected to one end of the resistor R22, the other end of the resistor R22 is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to the positive electrode of the diode D18;

[0044] Among them, one end of the resistor R16 in the secondary control circuit is connected to the cathode of the diode D14 of the primary control circuit, the other end of the resistor R16 is connected in parallel to one end of the resistor R18, the anode of the capacitor C2 and one end of the potentiometer RP1, the other end of the resistor R18 and the cathode of the capacitor C2 are grounded, the other end of the potentiometer RP1 is connected to the anode input end of the amplifier U1B, the cathode input end of the amplifier U1B is connected in parallel to the cathode of the voltage regulator DZ13 and one end of the resistor R11, the anode of the voltage regulator DZ13 is grounded, the other end of the resistor R11 is connected to the power supply VCC, the output end of the amplifier U1B is connected to one end of the resistor R10, the other end of the resistor R10 is connected in parallel to one end of the resistor R9 and the gate of the NMOS tube Q3, the source of the NMOS tube Q3 and the other end of the resistor R9 are grounded, and the drain of the NMOS tube Q3 is connected to the other end of the power input end of the output circuit 03; the capacitor C2 is an electrolytic capacitor;

[0045] The output circuit 03 includes an output interface, which is respectively connected to the power output end of the voltage stabilizing circuit and the output end of the input control circuit 02 .

[0046] The specific implementation principle of this utility model patent is as follows: by connecting the input power supply directly to the VCC voltage stabilizing circuit module through the diode D5, the influence of the energy storage time of the capacitor C9 on the system can be eliminated, ensuring that the VCC power supply can be quickly and stably established after the product is powered on. Such design optimization helps to improve the reliability of the system, etc.; the circuit adopts a simplified half-wave rectification to reduce the number of diodes in the load circuit. Although this simplified design still has a voltage drop of two diodes, through further adjustment, the positive pole of the diode D7 is directly connected to the positive pole of the diode D15, which successfully maintains the original function while reducing the diode voltage drop in the load circuit to one, which can reduce the power consumption of low-voltage products and improve their stability, etc.; the circuit adopts a multi-stage operational amplifier design to achieve precise control of the input voltage. The workflow is as follows:

[0047] 1. Input voltage judgment: First, the circuit judges the input voltage through the operational amplifier U1A; when the input voltage reaches the set threshold, the output state of the operational amplifier U1A flips;

[0048] 2. Output voltage control: The flip of op amp U1A triggers the flip of op amp U1B, thereby outputting a stable VCC voltage;

[0049] 3. Load energization: The output of op amp U1B fully turns on transistor Q3, thereby energizing the load;

[0050] 4. Delay control: When the input voltage is lower than the threshold, the op amp U1A flips again, and the circuit uses capacitor C2 and adjustable resistor R18 (supports multiple gear adjustments) to achieve delay, which makes the flipping of op amp U1B also delayed accordingly, thereby ensuring the accuracy and flexibility of time.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptively regulated protection power supply circuit, characterized in that: The protection power supply circuit includes: an input circuit, an input control circuit, an energy storage circuit, a voltage stabilizing circuit and an output circuit. The power input end of the input circuit is connected to an external power supply, the power output end of the input circuit is connected to the power input end of the energy storage circuit, the power output end of the energy storage circuit is connected to the power input end of the voltage stabilizing circuit, the power output end of the voltage stabilizing circuit is connected to one end of the power input end of the output circuit, the control end of the input circuit is connected to the control end of the input control circuit, the output end of the input control circuit is connected to the other end of the power input end of the output circuit, and the power output end of the output circuit is connected to external power supply.

2. The adaptively regulated protection power supply circuit according to claim 1, characterized in that: The input control circuit includes a primary control circuit and a secondary control circuit, the control end of the primary control circuit is connected to the control end of the input circuit, the output end of the primary control circuit is connected to the input end of the secondary control circuit, and the output end of the secondary control circuit is connected to the other end of the power input end of the output circuit.

3. The adaptively regulated protection power supply circuit according to claim 1, characterized in that: The input circuit includes a power interface, a resistor RX, a diode D15, a diode D7, a diode D17, a voltage regulator DZ5 and an NMOS tube Q1. The input end of the power interface is externally connected to an external power supply. The positive output end of the power interface is connected in parallel to the positive electrode of the diode D15 and the positive electrode of the diode D7. The negative electrode of the diode D15 is connected to the power input end of the energy storage circuit. The negative electrode of the diode D7 is respectively connected to one end of the resistor RX, the drain of the NMOS tube Q1 and the control end of the input control circuit. The other end of the resistor RX is connected in parallel to the gate of the NMOS tube Q1 and the negative electrode of the voltage regulator DZ5. The positive electrode of the voltage regulator DZ5 is connected in parallel to the source of the NMOS tube Q1 and the positive electrode of the diode D17. The negative electrode of the diode D17 is connected to the other end of the power input end of the energy storage circuit. The negative output end of the power interface is grounded.

4. The adaptively regulated protection power supply circuit according to claim 1, characterized in that: The energy storage circuit includes a diode D16 and a capacitor C9, wherein the cathode of the diode D16 is connected to one end of the power output end of the input circuit, the anode of the diode D16 is connected in parallel to the other end of the power output end of the input circuit and one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

5. The adaptively regulated protection power supply circuit according to claim 1, characterized in that: The voltage stabilizing circuit includes a diode D5, a resistor RM, an NMOS tube Q2, a voltage stabilizing tube DZ6, a resistor R24, a voltage stabilizing tube DZ9 and a capacitor C3. The positive electrode of the diode D5 is connected to the power output end of the energy storage circuit, the negative electrode of the diode D5 is connected in parallel to one end of the resistor RM and the drain of the NMOS tube Q2, the other end of the resistor RM is connected in parallel to the gate of the NMOS tube Q2 and the negative electrode of the voltage stabilizing tube DZ6, the positive electrode of the voltage stabilizing tube DZ6 is grounded, the source of the NMOS tube Q2 is connected to one end of the resistor R24, the other end of the resistor R24 is connected in parallel to the negative electrode of the voltage stabilizing tube DZ9 and one end of the capacitor C3, and the positive electrode of the voltage stabilizing tube DZ9 and the other end of the capacitor C3 are grounded.

6. The adaptively regulated protection power supply circuit according to claim 2, characterized in that: The primary control circuit includes a resistor RN, a resistor R19, a diode D18, a resistor R12, a resistor R13, a resistor R14, an amplifier U1A, an NMOS tube Q4, a resistor R15 and a diode D14. One end of the resistor RN is connected to the control end of the input circuit. The other end of the resistor RN is connected in parallel to one end of the resistor R19, the positive electrode of the diode D18 and the positive input end of the amplifier U1A. The negative input end of the amplifier U1A is connected in parallel to one end of the resistor R12, one end of the resistor R13 and the resistor R1 4, the other end of the resistor R12 is connected to the DC power supply, the other end of the resistor R13 and the other end of the resistor R19 are grounded, the cathode of the diode D18 is connected to the DC power supply, the other end of the resistor R14 is connected to the drain of the NMOS tube Q4, the source of the NMOS tube Q4 is grounded, the gate of the NMOS tube Q4 is connected to one end of the resistor R15, the other end of the resistor R15 is connected in parallel to the output end of the amplifier U1A and the anode of the diode D14, and the cathode of the diode D14 is connected to the input end of the secondary control circuit.

7. The adaptively regulated protection power supply circuit according to claim 2, characterized in that: The secondary control circuit includes a resistor R16, a resistor R18, a capacitor C2, a potentiometer RP1, a voltage regulator DZ13, a resistor R11, an amplifier U1B, a resistor R10, a resistor R9 and an NMOS tube Q3. The output end of the primary control circuit is connected to one end of the resistor R16, the other end of the resistor R16 is connected in parallel to one end of the resistor R18, one end of the capacitor C2 and one end of the potentiometer RP1, the other end of the resistor R18 and the other end of the capacitor C2 are grounded, and the other end of the potentiometer RP1 is connected to the amplifier U1B The positive input terminal, the negative input terminal of the amplifier U1B is connected in parallel to the negative terminal of the voltage regulator DZ13 and one end of the resistor R11, the positive terminal of the voltage regulator DZ13 is grounded, the other end of the resistor R11 is connected to a DC power supply, the output terminal of the amplifier U1B is connected to one end of the resistor R10, the other end of the resistor R10 is connected in parallel to one end of the resistor R9 and the gate of the NMOS tube Q3, the source of the NMOS tube Q3 and the other end of the resistor R9 are grounded, and the drain of the NMOS tube Q3 is connected to the other end of the power input terminal of the output circuit.

8. The adaptively regulated protection power supply circuit according to claim 1, characterized in that: The output circuit comprises an output interface, and the output interface is respectively connected to the power output end of the voltage stabilizing circuit and the output end of the input control circuit.

9. The adaptively regulated protection power supply circuit according to claim 7, characterized in that: The capacitor C2 is an electrolytic capacitor, the other end of the resistor R16 is connected to the positive electrode of the capacitor C2, and the negative electrode of the capacitor C2 is grounded.

10. The adaptively regulated protection power supply circuit according to claim 5, characterized in that: The capacitor C3 is an electrolytic capacitor, the other end of the resistor R24 is connected to the positive electrode of the capacitor C3, and the negative electrode of the capacitor C3 is grounded.