An electric variable regulating circuit

Abstract

The invention discloses an electric variable regulating circuit, which relates to the field of electric variable regulating. The electric variable regulating circuit comprises: a load working module, which is used for the load to be powered on after the working voltage is input; a signal acquisition module, which is used for acquiring the current signal flowing through the load, converting it into a voltage signal to obtain a sampling signal, and outputting different regulating signals based on the size of the sampling signal; a variable regulating module, which is used for increasing the working voltage by different sizes based on the different regulating signals received, and supplying the amplification to the load working module; the output end of the load working module is connected to the input end of the signal acquisition module. The beneficial effect of the invention is that the invention controls the voltage output from the variable regulating module to the load working module after the signal acquisition module acquires the load power signal in a low temperature environment, thereby accelerating the heating speed of the load and reducing the time for the power load to recover to normal operation.

Description

Technical Field

[0001] The invention relates to the field of electric variable regulation, in particular to an electric variable regulation circuit. Background Art

[0002] In a low-temperature environment, the low temperature reduces the thermal motion energy of electrons and the collision frequency between electrons and the lattice. Therefore, when the current passes through the conductor, it will encounter greater resistance, resulting in an increase in voltage drop and a significant decrease in the conductivity of the conductor. In a low-temperature environment, the electrical load often needs to run for a period of time before it can recover to normal operation due to self-heating. Therefore, in areas with relatively low ambient temperatures, it takes a long time for the electrical load to recover to normal operation, which needs to be improved. Summary of the invention

[0003] The object of the present invention is to provide an electric variable regulating circuit to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An electric variable regulating circuit, comprising:

[0006] Load working module, used for the load to be powered and work after the working voltage is input;

[0007] The signal acquisition module is used to collect the current signal flowing through the load, convert it into a voltage signal to obtain a sampling signal, and output different adjustment signals based on the size of the sampling signal;

[0008] The variable adjustment module is used to increase the working voltage by different magnitudes based on different adjustment signals received, and supply the voltage to the load working module;

[0009] The output end of the load working module is connected to the input end of the signal acquisition module, the output end of the signal acquisition module is connected to the first input end of the variable adjustment module, and the output end of the variable adjustment module is connected to the input end of the load working module.

[0010] As a further solution of the present invention: the load working module includes a first resistor, a second resistor, a first field effect transistor, a load, and a third resistor. One end of the first resistor is connected to the working voltage, the other end of the first resistor is connected to one end of the second resistor and the drain of the first field effect transistor, the other end of the second resistor is connected to the gate of the first field effect transistor, the source of the first field effect transistor is connected to one end of the load, the other end of the load is connected to one end of the third resistor and the input end of the signal acquisition module, and the other end of the third resistor is grounded.

[0011] As a further solution of the present invention: the signal acquisition module includes a minimum trigger unit, an intermediate trigger unit, and a maximum trigger unit. The input end of the minimum trigger unit is connected to the output end of the load working module, the first input end of the intermediate trigger unit, and the first input end of the maximum trigger unit (common point D); the output end of the minimum trigger unit is connected to the first input end of the variable adjustment module and the second input end of the intermediate trigger unit (common point A); the first output end of the intermediate trigger unit is connected to the first input end of the variable adjustment module (common point B); the second output end of the intermediate trigger unit is connected to the second input end of the maximum trigger unit (the gate of the third field effect transistor); and the output end of the maximum trigger unit is connected to the first input end of the variable adjustment module (common point C).

[0012] As a further solution of the present invention: the minimum trigger unit includes a first amplifier, the non-inverting end of the first amplifier is connected to the minimum reference voltage, the inverting end of the first amplifier is connected to the output end of the load working module, and the output end of the first amplifier is connected to the first input end of the variable adjustment module and the second input end of the intermediate trigger unit.

[0013] As a further solution of the present invention: the intermediate trigger unit includes at least one intermediate trigger sub-unit, the intermediate trigger sub-unit includes a second amplifier and a second field effect transistor, the in-phase end of the second amplifier is connected to the intermediate reference voltage, the inverting end of the second amplifier is connected to the output end of the load working module, the output end of the second amplifier is connected to the source of the second field effect transistor and the second input end of the maximum trigger unit, the gate of the second field effect transistor is connected to the output end of the minimum trigger unit, and the drain of the second field effect transistor is connected to the first input end of the variable adjustment module;

[0014] When multiple intermediate trigger sub-units are connected, the output end of the amplifier of the previous intermediate trigger sub-unit is connected to the gate of the field effect transistor of the next intermediate trigger sub-unit, the gate of the field effect transistor of the first intermediate trigger sub-unit is connected to the output end of the smallest trigger unit, and the output end of the amplifier of the last intermediate trigger sub-unit is connected to the second input end of the largest trigger unit; the intermediate reference voltage of the intermediate trigger sub-unit closer to the smallest trigger unit is smaller, and the intermediate reference voltage of the intermediate trigger sub-unit closer to the largest trigger unit is larger.

[0015] As a further solution of the present invention: the maximum trigger unit includes a third amplifier and a third field effect transistor, the inverting end of the third amplifier is connected to the output end of the load working module, the non-inverting end of the third amplifier is connected to the maximum reference voltage, the output end of the third amplifier is connected to the source of the third field effect transistor, the gate of the third field effect transistor is connected to the second output end of the intermediate trigger unit, and the source of the third field effect transistor is connected to the first input end of the variable adjustment module.

[0016] As a further solution of the present invention: the variable adjustment module includes a fourth voltage stabilizer, a fourth resistor, a fifth resistor, a first capacitor, a first switch, a fifth field effect transistor, a sixth field effect transistor, a seventh field effect transistor, a sixth resistor, a seventh resistor, and an eighth resistor. The input end of the fourth voltage stabilizer is connected to the power supply, the ground end of the fourth voltage stabilizer is connected to one end of the fourth resistor, one end of the fifth resistor, one end of the sixth resistor, one end of the seventh resistor, and one end of the eighth resistor, and the other end of the fourth resistor is grounded. The output end of the fourth voltage stabilizer is connected to the input end of the load working module, one end of the first capacitor, the other end of the fifth resistor, and one end of the first switch. The other end of the first capacitor is grounded, and the other end of the first switch is connected to the drain of the fifth field effect transistor, the drain of the sixth field effect transistor, and the drain of the seventh field effect transistor. The source of the fifth field effect transistor is connected to the other end of the sixth resistor, the source of the sixth field effect transistor is connected to the other end of the seventh resistor, and the source of the seventh field effect transistor is connected to the other end of the eighth resistor. The gate of the fifth field effect transistor is connected to the output end of the signal acquisition module, the gate of the sixth field effect transistor is connected to the output end of the signal acquisition module, and the gate of the seventh field effect transistor is connected to the output end of the signal acquisition module.

[0017] As a further solution of the present invention: the electric variable regulating circuit further includes:

[0018] A delay recovery module, used to recover the working voltage output by the variable adjustment module after a delay, so that the working voltage becomes the working voltage when the variable adjustment module does not receive different adjustment signals;

[0019] The input end of the delay recovery module is connected to the output end of the variable adjustment module, and the output end of the delay recovery module is connected to the second input end of the variable adjustment module.

[0020] As a further solution of the present invention: the delay recovery module includes a ninth resistor, a tenth resistor, a second capacitor, a first diode, a second diode, an eleventh resistor, a fourth transistor, a first relay, and a third diode. One end of the ninth resistor is connected to one end of the tenth resistor and the output end of the variable adjustment module, the other end of the ninth resistor is connected to one end of the second capacitor and the negative electrode of the first diode, the other end of the second capacitor is grounded, the anode of the first diode is connected to one end of the eleventh resistor and the base of the fourth transistor, the other end of the eleventh resistor is grounded, the other end of the tenth resistor is connected to the anode of the second diode, the negative electrode of the second diode is connected to the collector of the fourth transistor, the emitter of the fourth transistor is connected to the negative electrode of the third diode and one end of the first relay, the anode of the third diode is grounded, and the other end of the first relay is grounded.

[0021] Compared with the prior art, the beneficial effect of the present invention is as follows: the present invention sets a signal acquisition module and a variable adjustment module. In a low-temperature environment, after the signal acquisition module collects the power consumption signal of the load, it controls the voltage output by the variable adjustment module to the load working module, thereby accelerating the heating speed of the load and reducing the time for the power load to return to normal operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The schematic diagram of an electric variable regulation circuit.

[0023] Figure 2 It is the circuit diagram of the load working module, signal acquisition module and variable adjustment module.

[0024] Figure 3 This is the circuit diagram of the delay recovery module.

[0025] Figure 4 Circuit diagram for the connections of three intermediate trigger sub-units. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 , an electric variable regulating circuit, comprising:

[0028] Load working module 1, used for powering load X to work after the working voltage VCC is input;

[0029] The signal acquisition module 2 is used to collect the current signal flowing through the load X, convert it into a voltage signal to obtain a sampling signal, and output different adjustment signals based on the size of the sampling signal;

[0030] The variable adjustment module 3 is used to increase the working voltage VCC by different magnitudes based on different adjustment signals received, and supply the voltage to the load working module 1;

[0031] The output end of the load working module 1 is connected to the input end of the signal acquisition module 2 , the output end of the signal acquisition module 2 is connected to the first input end of the variable adjustment module 3 , and the output end of the variable adjustment module 3 is connected to the input end of the load working module 1 .

[0032] In this example: See Figure 2The load working module 1 includes a first resistor R1, a second resistor R2, a first field effect transistor V1, a load X, and a third resistor R3. One end of the first resistor R1 is connected to the working voltage VCC, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the drain of the first field effect transistor V1, the other end of the second resistor R2 is connected to the gate of the first field effect transistor V1, the source of the first field effect transistor V1 is connected to one end of the load X, the other end of the load X is connected to one end of the third resistor R3 and the input end of the signal acquisition module 2, and the other end of the third resistor R3 is grounded.

[0033] After the working voltage VCC is input, it passes through the first resistor R1 and the second resistor R2, so that the gate of the first field effect transistor V1 is at a high level, and the first field effect transistor V1 is turned on. The working voltage VCC supplies power to the load X through the first resistor R1 and the first field effect transistor V1, and the load X is powered on. The current flowing through the load X is equal to the current flowing through the third resistor R3. The voltage on the third resistor R3 (the voltage on the common point D) is sampled to reflect the working state of the load X.

[0034] In another embodiment, the voltage on the third resistor R3 may also be acquired through a differential circuit.

[0035] In this example: See Figure 2 The signal acquisition module 2 includes a minimum trigger unit, an intermediate trigger unit, and a maximum trigger unit. The input end of the minimum trigger unit is connected to the output end of the load working module 1, the first input end of the intermediate trigger unit, and the first input end of the maximum trigger unit (common point D). The output end of the minimum trigger unit is connected to the first input end of the variable adjustment module 3 and the second input end of the intermediate trigger unit (common point A). The first output end of the intermediate trigger unit is connected to the first input end of the variable adjustment module 3 (common point B). The second output end of the intermediate trigger unit is connected to the second input end of the maximum trigger unit (the gate of the third field effect transistor V3), and the output end of the maximum trigger unit is connected to the first input end of the variable adjustment module 3 (common point C).

[0036] In this example: See Figure 2 The minimum trigger unit includes a first amplifier U1, the in-phase terminal of the first amplifier U1 is connected to the minimum reference voltage VREFMIN, the inverting terminal of the first amplifier U1 is connected to the output terminal of the load working module 1, and the output terminal of the first amplifier U1 is connected to the first input terminal of the variable adjustment module 3 and the second input terminal of the intermediate trigger unit.

[0037] In this example: See Figure 2 and Figure 4The intermediate trigger unit includes at least one intermediate trigger sub-unit, which includes a second amplifier U2 and a second field effect tube V2. The in-phase terminal of the second amplifier U2 is connected to the intermediate reference voltage VREFMID, the inverting terminal of the second amplifier U2 is connected to the output terminal of the load working module 1, the output terminal of the second amplifier U2 is connected to the source of the second field effect tube V2 and the second input terminal of the maximum trigger unit, the gate of the second field effect tube V2 is connected to the output terminal of the minimum trigger unit, and the drain of the second field effect tube V2 is connected to the first input terminal of the variable adjustment module 3;

[0038] When multiple intermediate trigger sub-units are connected, the output end of the amplifier of the previous intermediate trigger sub-unit is connected to the gate of the field effect transistor of the next intermediate trigger sub-unit, the gate of the field effect transistor of the first intermediate trigger sub-unit is connected to the output end of the smallest trigger unit, and the output end of the amplifier of the last intermediate trigger sub-unit is connected to the second input end of the largest trigger unit; the intermediate reference voltage VREFMID of the intermediate trigger sub-unit closer to the smallest trigger unit is smaller, and the intermediate reference voltage VREFMID of the intermediate trigger sub-unit closer to the largest trigger unit is larger.

[0039] In this example: See Figure 2 The maximum trigger unit includes a third amplifier U3 and a third field effect transistor V3. The inverting end of the third amplifier U3 is connected to the output end of the load working module 1, the non-inverting end of the third amplifier U3 is connected to the maximum reference voltage VREFMAX, the output end of the third amplifier U3 is connected to the source of the third field effect transistor V3, the gate of the third field effect transistor V3 is connected to the second output end of the intermediate trigger unit, and the source of the third field effect transistor V3 is connected to the first input end of the variable adjustment module 3.

[0040] Take the case where the intermediate trigger unit has only one intermediate trigger sub-unit as an example. Figure 2As shown, in a low temperature environment, the current flowing through the load X is smaller than that in normal operation. At this time, the voltage of the common point D is small. When it is less than the minimum reference voltage VREFMIN, the first amplifier U1, the second amplifier U2, and the third amplifier U3 all output high levels, so that the first field effect transistor V1 and the second field effect transistor V2 are cut off, and the common point A outputs a high level and feeds back to the variable adjustment module 3 to adjust the size of the working voltage VCC. At this time, the working voltage VCC is increased to the maximum compared with the initial working voltage VCC; when the voltage of the common point D is greater than the minimum reference voltage VREFMIN and less than the intermediate reference voltage VREFMID, the second amplifier U 2. The third amplifier U3 outputs a high level, the second field effect tube V2 is turned on, the third field effect tube V3 is turned off, and the common point B outputs a high level and feeds back to the variable adjustment module 3 to adjust the size of the working voltage VCC. At this time, the working voltage VCC is increased by an intermediate amount compared to the initial working voltage VCC; when the voltage of the common point D is greater than the intermediate reference voltage VREFMID and less than the maximum reference voltage VREFMAX, the third amplifier U3 outputs a high level and passes through the third field effect tube V3. The common point B outputs a high level and feeds back to the variable adjustment module 3 to adjust the size of the working voltage VCC. At this time, the working voltage VCC is increased by the minimum amount compared to the initial working voltage VCC.

[0041] Therefore, when the ambient temperature is particularly low and the voltage at the common point D is initially less than the minimum reference voltage VREFMIN, the operating voltage VCC is first increased to the maximum to increase the current flowing through the load X to the maximum extent, accelerate the heating speed of the load X, and enable the load X to quickly recover to a normal working state; as the load X continues to heat up, when the voltage at the common point D is greater than the minimum reference voltage VREFMIN and less than the intermediate reference voltage VREFMID, the operating voltage VCC is increased to the intermediate level to reduce the size of the operating voltage VCC; as the load X further heats up, when the voltage at the common point D is greater than the intermediate reference voltage VREFMID and less than the maximum reference voltage VREFMAX, the operating voltage VCC is increased to the minimum level to further reduce the size of the operating voltage VCC; when the load X heats up to a normal working state, the voltage at the common point D is greater than the maximum reference voltage VREFMAX, the operating voltage VCC is not increased, and is the size of the normal working voltage VCC, and the load X is maintained to work normally. In a low temperature environment, the increase of the operating voltage VCC gradually decreases, which avoids maintaining a large increase in the operating voltage VCC when the load X heats up to a state close to normal operation, and avoids a large current caused by a large change in the operating voltage VCC during the process of converting the large increase in the operating voltage VCC into the normal operating voltage VCC, which affects the service life of the load X and components.

[0042] See also Figure 4 , Figure 4This is a connection diagram of three intermediate trigger sub-units. Designing more intermediate trigger sub-modules ensures the smooth change of the operating voltage VCC and can further reduce the magnitude of the instantaneous current generated during the voltage change process.

[0043] In another embodiment: in actual use, the number of intermediate trigger sub-units is not limited and can be increased or decreased at will according to actual conditions.

[0044] In this example: See Figure 2 The variable adjustment module 3 includes a fourth voltage stabilizer U4, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a first switch S1, a fifth field effect transistor V5, a sixth field effect transistor V6, a seventh field effect transistor V7, a sixth resistor R7, a seventh resistor R7, and an eighth resistor R8. The input end of the fourth voltage stabilizer U4 is connected to the power supply VDD, the ground end of the fourth voltage stabilizer U4 is connected to one end of the fourth resistor R4, one end of the fifth resistor R5, one end of the sixth resistor R7, one end of the seventh resistor R7, and one end of the eighth resistor R8. The other end of the fourth resistor R4 is grounded, and the output end of the fourth voltage stabilizer U4 is connected to the input end of the load working module 1, one end of the first capacitor C1, and the fifth The other end of the resistor R5, one end of the first switch S1, and the other end of the first capacitor C1 are grounded, the other end of the first switch S1 is connected to the drain of the fifth field effect transistor V5, the drain of the sixth field effect transistor V6, and the drain of the seventh field effect transistor V7, the source of the fifth field effect transistor V5 is connected to the other end of the sixth resistor R7, the source of the sixth field effect transistor V6 is connected to the other end of the seventh resistor R7, the source of the seventh field effect transistor V7 is connected to the other end of the eighth resistor R8, the gate of the fifth field effect transistor V5 is connected to the output end of the signal acquisition module 2, the gate of the sixth field effect transistor V6 is connected to the output end of the signal acquisition module 2, and the gate of the seventh field effect transistor V7 is connected to the output end of the signal acquisition module 2.

[0045] Take the case where the intermediate trigger unit has only one intermediate trigger sub-unit as an example. In the process of the increase of the working voltage VCC, A is high first, followed by B, then C, and finally A, B, and C are all low, and the load X has reached a normal working state. The sixth resistor R7 is smaller than the seventh resistor R7 and smaller than the eighth resistor R8. When the common points A, B, and C are closed respectively, ignoring the voltage drops of the fifth field effect transistor V5, the sixth field effect transistor V6, and the seventh field effect transistor V7, the resistance of the fifth resistor R5 and the sixth resistor R7 in parallel is the smallest, the resistance of the fifth resistor R5 and the seventh resistor R7 in parallel is moderate, and the resistance of the fifth resistor R5 and the eighth resistor R8 in parallel is the largest. In these three conditions, when the common point A is high, the increase of the working voltage VCC is the largest, when the common point B is high, the increase of the working voltage VCC is moderate, and when the common point C is high, the increase of the working voltage VCC is the smallest. Therefore, in a low temperature environment, after receiving the feedback from the common point D and passing through the signal acquisition module 2, the increase in the operating voltage VCC gradually decreases until it is no longer increased and becomes the normal operating voltage VCC of the load X, thereby maintaining the normal operation of the load X.

[0046] In another embodiment, other voltage stabilizing devices may be connected in parallel with the fifth resistor R5 to construct an output with an increased voltage variation of the operating voltage VCC.

[0047] In this example: See Figure 1 , the electric variable regulating circuit also includes:

[0048] The delay recovery module 4 is used to recover the working voltage VCC output by the variable adjustment module 3 after the delay, so that the working voltage VCC becomes the working voltage VCC when the variable adjustment module 3 does not receive the different adjustment signal;

[0049] An input end of the delay recovery module 4 is connected to an output end of the variable adjustment module 3 , and an output end of the delay recovery module 4 is connected to a second input end of the variable adjustment module 3 .

[0050] In this example: See Figure 3The delay recovery module 4 includes a ninth resistor R9, a tenth resistor R10, a second capacitor C2, a first diode D1, a second diode D2, an eleventh resistor R11, a fourth transistor V4, a first relay J1, and a third diode D3. One end of the ninth resistor R9 is connected to one end of the tenth resistor R10 and the output end of the variable adjustment module 3, the other end of the ninth resistor R9 is connected to one end of the second capacitor C2 and the cathode of the first diode D1, the other end of the second capacitor C2 is grounded, the anode of the first diode D1 is connected to one end of the eleventh resistor R11 and the base of the fourth transistor V4, the other end of the eleventh resistor R11 is grounded, the other end of the tenth resistor R10 is connected to the anode of the second diode D2, the cathode of the second diode D2 is connected to the collector of the fourth transistor V4, the emitter of the fourth transistor V4 is connected to the cathode of the third diode D3 and one end of the first relay J1, the anode of the third diode D3 is grounded, and the other end of the first relay J1 is grounded.

[0051] During operation, as time goes by, the load X has been working normally, and the working voltage VCC has stopped increasing. Considering that the working voltage VCC continues to increase under a fault condition, when the temperature at the load X no longer has an impact, the amplified working voltage VCC is large and may cause damage to the load X. Therefore, a delay recovery module 4 is designed; the working voltage VCC charges the second capacitor C2 through the ninth resistor R9. After the second capacitor C2 is charged to a level sufficient to turn on the first diode D1, the fourth transistor V4 is triggered to turn on, the first relay J1 is energized to work, and the first switch S1 is controlled to be disconnected (the first switch S1 is closed under normal conditions), so as to avoid the sixth resistor R7, the seventh resistor R7, the eighth resistor R8 being connected in parallel with the fifth resistor R5 to cause the working voltage VCC to increase.

[0052] In another embodiment, the delay time of delaying the triggering of the first relay J1 after power-on is changed by selecting voltage regulator tubes with different voltage stabilization values ​​or by changing the resistance value of the ninth resistor R9.

[0053] The working principle of the present invention is: the load working module 1 is used to enable the load X to be powered on after the working voltage VCC is input; the signal acquisition module 2 is used to collect the current signal flowing through the load X, convert it into a voltage signal to obtain a sampling signal, and output different adjustment signals based on the size of the sampling signal; the variable adjustment module 3 is used to generate working voltages VCC of different sizes based on the different adjustment signals received, and supply them to the load working module 1; the delay recovery module 4 is used to restore the working voltage VCC output by the variable adjustment module 3 after a delay, so that the working voltage VCC becomes the working voltage VCC when the variable adjustment module 3 does not receive different adjustment signals.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

[0055] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric variable regulating circuit, characterized in that: The electric variable regulating circuit comprises: Load working module, used for the load to be powered and work after the working voltage is input; The signal acquisition module is used to collect the current signal flowing through the load, convert it into a voltage signal to obtain a sampling signal, and output different adjustment signals based on the size of the sampling signal; The variable adjustment module is used to increase the working voltage by different magnitudes based on different adjustment signals received, and supply the voltage to the load working module; The output end of the load working module is connected to the input end of the signal acquisition module, the output end of the signal acquisition module is connected to the first input end of the variable adjustment module, and the output end of the variable adjustment module is connected to the input end of the load working module; The signal acquisition module includes a minimum trigger unit, an intermediate trigger unit, and a maximum trigger unit. The input end of the minimum trigger unit is connected to the output end of the load working module, the first input end of the intermediate trigger unit, and the first input end of the maximum trigger unit. The output end of the minimum trigger unit is connected to the first input end of the variable adjustment module and the second input end of the intermediate trigger unit. The first output end of the intermediate trigger unit is connected to the first input end of the variable adjustment module. The second output end of the intermediate trigger unit is connected to the second input end of the maximum trigger unit. The output end of the maximum trigger unit is connected to the first input end of the variable adjustment module. The minimum trigger unit includes a first amplifier, a non-inverting terminal of the first amplifier is connected to the minimum reference voltage, an inverting terminal of the first amplifier is connected to the output terminal of the load working module, and the output terminal of the first amplifier is connected to the first input terminal of the variable adjustment module and the second input terminal of the intermediate trigger unit; The intermediate trigger unit includes at least one intermediate trigger sub-unit, which includes a second amplifier and a second field effect tube. The in-phase end of the second amplifier is connected to the intermediate reference voltage, the inverting end of the second amplifier is connected to the output end of the load working module, the output end of the second amplifier is connected to the source of the second field effect tube and the second input end of the maximum trigger unit, the gate of the second field effect tube is connected to the output end of the minimum trigger unit, and the drain of the second field effect tube is connected to the first input end of the variable adjustment module. When multiple intermediate trigger sub-units are connected, the output end of the amplifier of the previous intermediate trigger sub-unit is connected to the gate of the field effect transistor of the next intermediate trigger sub-unit, the gate of the field effect transistor of the first intermediate trigger sub-unit is connected to the output end of the smallest trigger unit, and the output end of the amplifier of the last intermediate trigger sub-unit is connected to the second input end of the largest trigger unit; the intermediate reference voltage of the intermediate trigger sub-unit closer to the smallest trigger unit is smaller, and the intermediate reference voltage of the intermediate trigger sub-unit closer to the largest trigger unit is larger; The maximum trigger unit includes a third amplifier and a third field effect transistor. The inverting end of the third amplifier is connected to the output end of the load working module, the non-inverting end of the third amplifier is connected to the maximum reference voltage, the output end of the third amplifier is connected to the source of the third field effect transistor, the gate of the third field effect transistor is connected to the second output end of the intermediate trigger unit, and the source of the third field effect transistor is connected to the first input end of the variable adjustment module.

2. The electric variable regulating circuit according to claim 1, characterized in that: The load working module includes a first resistor, a second resistor, a first field effect transistor, a load, and a third resistor. One end of the first resistor is connected to the working voltage, the other end of the first resistor is connected to one end of the second resistor and the drain of the first field effect transistor, the other end of the second resistor is connected to the gate of the first field effect transistor, the source of the first field effect transistor is connected to one end of the load, the other end of the load is connected to one end of the third resistor and the input end of the signal acquisition module, and the other end of the third resistor is grounded.

3. The electric variable regulating circuit according to claim 1, characterized in that: The variable adjustment module includes a fourth voltage stabilizer, a fourth resistor, a fifth resistor, a first capacitor, a first switch, a fifth field effect transistor, a sixth field effect transistor, a seventh field effect transistor, a sixth resistor, a seventh resistor, and an eighth resistor. The input end of the fourth voltage stabilizer is connected to the power supply, the ground end of the fourth voltage stabilizer is connected to one end of the fourth resistor, one end of the fifth resistor, one end of the sixth resistor, one end of the seventh resistor, and one end of the eighth resistor, and the other end of the fourth resistor is grounded. The output end of the fourth voltage stabilizer is connected to the input end of the load working module, one end of the first capacitor, the other end of the fifth resistor, and one end of the first switch. The other end of the first capacitor is grounded, and the other end of the first switch is connected to the drain of the fifth field effect transistor, the drain of the sixth field effect transistor, and the drain of the seventh field effect transistor. The source of the fifth field effect transistor is connected to the other end of the sixth resistor, the source of the sixth field effect transistor is connected to the other end of the seventh resistor, and the source of the seventh field effect transistor is connected to the other end of the eighth resistor. The gate of the fifth field effect transistor is connected to the output end of the signal acquisition module, the gate of the sixth field effect transistor is connected to the output end of the signal acquisition module, and the gate of the seventh field effect transistor is connected to the output end of the signal acquisition module.

4. The electric variable regulating circuit according to any one of claims 1 to 3, characterized in that: The electric variable regulating circuit also includes: A delay recovery module, used to recover the working voltage output by the variable adjustment module after a delay, so that the working voltage becomes the working voltage when the variable adjustment module does not receive different adjustment signals; The input end of the delay recovery module is connected to the output end of the variable adjustment module, and the output end of the delay recovery module is connected to the second input end of the variable adjustment module.

5. The electric variable regulating circuit according to claim 4, characterized in that: The delay recovery module includes a ninth resistor, a tenth resistor, a second capacitor, a first diode, a second diode, an eleventh resistor, a fourth transistor, a first relay, and a third diode. One end of the ninth resistor is connected to one end of the tenth resistor and the output end of the variable adjustment module, the other end of the ninth resistor is connected to one end of the second capacitor and the negative electrode of the first diode, the other end of the second capacitor is grounded, the positive electrode of the first diode is connected to one end of the eleventh resistor and the base of the fourth transistor, the other end of the eleventh resistor is grounded, the other end of the tenth resistor is connected to the positive electrode of the second diode, the negative electrode of the second diode is connected to the collector of the fourth transistor, the emitter of the fourth transistor is connected to the negative electrode of the third diode and one end of the first relay, the positive electrode of the third diode is grounded, and the other end of the first relay is grounded.

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