Sectional type self-adjusting dummy load device

Abstract

The utility model belongs to the technical field of power supplies, and particularly relates to a sectional type self-adjusting dummy load device which comprises a first control circuit used for outputting a first control signal; the second control circuit is used for outputting a second control signal; the third control circuit is used for outputting a third control signal; and the dummy load power regulation circuit is used for changing the power of the dummy load according to the first control signal, the second control signal and the third control signal so as to maintain the stability of the output voltage. According to the invention, unstable factors such as output oscillation of each voltage section and the like can be solved, and the dummy load can be in a relatively low operation level, so that the power supply efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a segmented self-regulating dummy load device. Background Technology

[0002] In related technologies, a resistor is directly connected to the output terminal of the power supply as a dummy load. The resistor serves two purposes: first, when the power supply output is turned off, the resistor discharges the energy on the capacitor; second, since switching power supplies use pulse modulation technology, connecting a dummy load under no-load conditions can resolve phenomena such as power supply oscillation, output overshoot, and runaway, ensuring the reliability of the power supply system's normal operation.

[0003] However, circuits using pure resistors as dummy loads have the following problems: First, when the power supply output voltage is high, it is impossible to control the opening and closing of the dummy load. The dummy load will generate a lot of heat and power consumption, which will affect the efficiency of the power supply on the one hand, and on the other hand, due to power loss, the fan speed needs to be increased for heat dissipation. At the same time, increasing the speed will also increase the fan noise, which will worsen the customer experience. Second, when the power supply output voltage is low, it is basically ineffective, which will cause fluctuations in the output voltage. After the power supply is turned off, the output capacitance is large and the discharge time is particularly long, which cannot be compatible with high and low voltage power supply output designs.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] In view of at least one of the above technical problems, this application provides a segmented self-adjusting dummy load device.

[0006] This application provides a segmented self-adjusting dummy load device, comprising:

[0007] The first control circuit is used to output the first control signal;

[0008] The second control circuit is used to output the second control signal;

[0009] The third control circuit is used to output the third control signal;

[0010] The dummy load power regulation circuit is used to change the power of the dummy load according to the first control signal, the second control signal and the third control signal, so as to maintain the stability of the output voltage.

[0011] One of the above technical solutions has at least one of the following advantages or beneficial effects: This application can solve unstable factors such as output oscillation in various voltage segments, and can also keep the dummy load at a low operating level, thereby improving power efficiency.

[0012] In some possible implementations, the dummy load power regulation circuit includes: a fifth operational amplifier, a second field-effect transistor, a thirty-seventh resistor, a power regulation resistor, and a first node. The first node is connected to the first control circuit, the second control circuit, the third control circuit, and the thirty-seventh resistor. The first terminal of the fifth operational amplifier is connected to the first node. The second terminal of the fifth operational amplifier is connected to the third terminal of the second field-effect transistor. The third terminal of the fifth operational amplifier is connected to the second terminal of the second field-effect transistor. The first terminal of the second field-effect transistor is connected to the output voltage terminal. The first terminal of the power regulation resistor is connected to the second terminal of the fifth operational amplifier and the third terminal of the second field-effect transistor. The second terminal of the power regulation resistor is grounded. The second field-effect transistor is an NMOS transistor.

[0013] In some possible implementations, the first control circuit includes: a first adjustment unit and a first differential output circuit, a first terminal of the first differential output circuit being connected to the first adjustment unit, a second terminal of the first differential output circuit being connected to an output voltage attenuation signal terminal, a third terminal of the first differential output circuit being connected to the first node, and the first differential output circuit being used to output a first control signal.

[0014] In some possible implementations, the first adjustment unit includes a twenty-first resistor and a twenty-third resistor, wherein the first end of the twenty-third resistor is connected to a five-volt voltage terminal, the second end of the twenty-third resistor is connected to the second terminal of the first differential output circuit, the first end of the twenty-first resistor is grounded, and the second end of the twenty-first resistor is connected to the second end of the twenty-third resistor.

[0015] In some possible implementations, the second control circuit includes: a second adjustment unit and a second differential output circuit, a first terminal of the second differential output circuit being connected to the second adjustment unit, a second terminal of the second differential output circuit being connected to the output voltage attenuation signal terminal, a third terminal of the second differential output circuit being connected to the first node, and the second differential output circuit being used to output a second control signal.

[0016] In some possible implementations, the second adjustment unit includes a 31st resistor and a 32nd resistor, the first end of the 32nd resistor being connected to a 5-volt voltage terminal, the second end of the 32nd resistor being connected to the second terminal of the second differential output circuit, the first end of the 31st resistor being grounded, and the second end of the 31st resistor being connected to the second end of the 32nd resistor.

[0017] In some possible implementations, the third control circuit includes: a twenty-eighth resistor, the first end of which is connected to a five-volt voltage terminal, and the second end of which is connected to the first node.

[0018] In some possible implementations, the segmented self-adjusting dummy load device further includes a high-current control circuit; the high-current control circuit includes a fortieth resistor and a second diode, the first end of the fortieth resistor is connected to the output current attenuation signal terminal, the second end of the fortieth resistor is connected to the first end of the second diode, and the second end of the second diode is connected to the second end of the fifth operational amplifier.

[0019] In some possible implementations, the segmented self-adjusting dummy load device further includes: a voltage drop acceleration control circuit; the voltage drop acceleration control circuit includes: a differentiating circuit and a discharging circuit, the first terminal of the differentiating circuit is connected to the output voltage terminal, the third terminal of the discharging circuit is connected to the second terminal of the differentiating circuit, the first terminal of the discharging circuit is connected to the 12-volt voltage terminal, and the second terminal of the discharging circuit is connected to the first terminal of the fifth operational amplifier.

[0020] In some possible implementations, the differentiating circuit includes: a fourth operational amplifier, a seventh capacitor, a twenty-second resistor, and a twenty-seventh resistor. The first terminal of the fourth operational amplifier is grounded through the twenty-seventh resistor. The second terminal of the fourth operational amplifier is connected to the output voltage terminal through the seventh capacitor. The third terminal of the fourth operational amplifier is connected to the second terminal of the fourth operational amplifier through the twenty-second resistor. The third terminal of the fourth operational amplifier is connected to the third terminal of the discharge circuit.

[0021] The present application will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural diagram of the segmented self-adjusting dummy load device shown in the embodiments of this application;

[0024] Figure 2 This is a circuit diagram of the segmented self-adjusting dummy load device shown in the embodiments of this application;

[0025] In the picture:

[0026] 100. First control circuit; 110. First adjustment unit; 120. First differential output circuit;

[0027] V1, first control signal; R21, twenty-first resistor; R23, twenty-third resistor;

[0028] U3B, the third operational amplifier; R25, the twenty-fifth resistor; R26, the twenty-sixth resistor; R24, the twenty-fourth resistor;

[0029] V3, the third voltage; V2, the second voltage;

[0030] 200. Second control circuit; 210. Second adjustment unit; 220. Second differential output circuit;

[0031] V7, second control signal; R31, thirty-first resistor; R32, thirty-second resistor;

[0032] U1A, the first operational amplifier; R34, the thirty-fourth resistor; R38, the thirty-eighth resistor; R33, the thirty-third resistor;

[0033] V5, the fifth voltage; V6, the sixth voltage;

[0034] 300, Third control circuit; V8, Third control signal; R28, Twenty-eighth resistor;

[0035] 400. Dummy load power regulation circuit;

[0036] U5A, fifth operational amplifier; Q2, second field-effect transistor; R37, thirty-seventh resistor; RS1, power adjustment resistor; A, first node;

[0037] V5A, the fiftieth voltage; V6A, the sixtieth voltage;

[0038] 500, high current control circuit; R40, 40th resistor; D2, second diode;

[0039] 600. Voltage drop acceleration control circuit; 610. Differentiating circuit; 620. Discharge circuit;

[0040] U4, fourth operational amplifier; C7, seventh capacitor; R22, twenty-second resistor; R27, twenty-seventh resistor;

[0041] VOUT+, output voltage terminal; V_READ, output voltage attenuation signal terminal; +5V, five-volt voltage terminal; I_READ, output current attenuation signal terminal; +12V, twelve-volt voltage terminal; Detailed Implementation

[0042] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0043] like Figure 1 and Figure 2 As shown, this embodiment provides a segmented self-adjusting dummy load device, including: a first control circuit 100, a second control circuit 200, a third control circuit 300, a dummy load power adjustment circuit 400, a high current control circuit 500, and a voltage drop acceleration control circuit 600.

[0044] The system includes a first control circuit 100 for outputting a first control signal V1; a second control circuit 200 for outputting a second control signal V7; a third control circuit 300 for outputting a third control signal V8; and a dummy load power adjustment circuit 400 for changing the power of the dummy load according to the first control signal V1, the second control signal V7, and the third control signal V8, thereby maintaining a stable output voltage. This application can solve the problem of output voltage oscillation and other instability factors in various voltage ranges, and can also keep the dummy load at a lower operating level, thereby improving power supply efficiency.

[0045] The dummy load power regulation circuit 400 automatically adjusts the dummy load during power output based on the first control signal V1, the second control signal V7, and the third control signal V8, ensuring normal power supply operation. Specifically, when the output voltage is in the low-voltage range, the dummy load power regulation circuit 400 calculates the dummy load power based on the first control signal V1, the second control signal V7, and the third control signal V8, and then regulates it accordingly. When the output voltage is in the medium-voltage range, the dummy load power regulation circuit 400 calculates the dummy load power based on the second control signal V7 and the third control signal V8. When the output voltage is in the high-voltage range, the dummy load power regulation circuit 400 calculates the dummy load power based on the third control signal V8. This achieves targeted load regulation for different voltage ranges, keeping the dummy load power at a low level, thus improving power supply efficiency and reducing heat generation. The power supply cooling fan does not need to operate at high speed, greatly reducing fan noise and providing a better user experience.

[0046] like Figure 1 and Figure 2As shown, the dummy load power adjustment circuit 400 may include, but is not limited to: a fifth operational amplifier U5A, a second field-effect transistor Q2, a thirty-seventh resistor R37, a power adjustment resistor RS1, and a first node A. The first node A is connected to the first control circuit 100, the second control circuit 200, the third control circuit 300, and the thirty-seventh resistor R37. The first terminal of the fifth operational amplifier U5A is connected to the first node A. The second terminal of the fifth operational amplifier U5A is connected to the third terminal of the second field-effect transistor Q2. The third terminal of the fifth operational amplifier U5A is connected to the second terminal of the second field-effect transistor Q2. The first terminal of the second field-effect transistor Q2 is connected to the output voltage terminal VOUT+. The first terminal of the power adjustment resistor RS1 is connected to the second terminal of the fifth operational amplifier U5A and the third terminal of the second field-effect transistor Q2. The second terminal of the power adjustment resistor RS1 is grounded.

[0047] Among them, the voltage at the first terminal of the fifth operational amplifier U5A is defined as the fiftieth voltage V5A, and the voltage at the second terminal of the fifth operational amplifier U5A is defined as the sixtieth voltage V6A.

[0048] like Figure 1 and Figure 2 As shown, the first control circuit 100 may include, but is not limited to, a first adjustment unit 110 and a first differential output circuit 120. The first terminal of the first differential output circuit 120 is connected to the first adjustment unit 110, the second terminal of the first differential output circuit 120 is connected to the output voltage attenuation signal terminal V_READ, and the third terminal of the first differential output circuit 120 is connected to the first node A. The first differential output circuit 120 is used to output a first control signal V1.

[0049] Specifically, the first adjustment unit 110 may include, but is not limited to, a twenty-first resistor R21 and a twenty-third resistor R23, wherein the first end of the twenty-third resistor R23 is connected to the +5V voltage terminal, the second end of the twenty-third resistor R23 is connected to the second end of the first differential output circuit 120, the first end of the twenty-first resistor R21 is grounded, and the second end of the twenty-first resistor R21 is connected to the second end of the twenty-third resistor R23.

[0050] Specifically, the first differential output circuit 120 may include, but is not limited to: a third operational amplifier U3B, a twenty-fifth resistor R25, a twenty-sixth resistor R26, and a twenty-fourth resistor R24. The first terminal of the third operational amplifier U3B is connected to the twenty-first resistor R21 and the twenty-third resistor R23, respectively. The second terminal of the third operational amplifier U3B is connected to the output voltage attenuation signal terminal V_READ through the twenty-fifth resistor R25. The third terminal of the third operational amplifier U3B is connected to the second terminal of the third operational amplifier U3B through the twenty-sixth resistor R26. The third terminal of the third operational amplifier U3B is connected to the first node A through the twenty-fourth resistor R24.

[0051] Among them, the voltage at the first terminal of the third operational amplifier U3B is defined as the third voltage V3, the voltage at the second terminal of the third operational amplifier U3B is defined as the second voltage V2, and the voltage at the third terminal of the third operational amplifier U3B is defined as the first control signal V1.

[0052] like Figure 1 and Figure 2 As shown, the second control circuit 200 may include, but is not limited to, a second adjustment unit 210 and a second differential output circuit 220. The first terminal of the second differential output circuit 220 is connected to the second adjustment unit 210, the second terminal of the second differential output circuit 220 is connected to the output voltage attenuation signal terminal V_READ, the third terminal of the second differential output circuit 220 is connected to the first node A, and the second differential output circuit 220 is used to output the second control signal V7.

[0053] Specifically, the second adjustment unit 210 may include, but is not limited to, a thirty-first resistor R31 and a thirty-second resistor R32. The first end of the thirty-second resistor R32 is connected to the +5V voltage terminal, the second end of the thirty-second resistor is connected to the second end of the second differential output circuit 220, the first end of the thirty-first resistor R31 is grounded, and the second end of the thirty-first resistor R31 is connected to the second end of the thirty-second resistor R32.

[0054] Specifically, the second differential output circuit 220 may include, but is not limited to: a first operational amplifier U1A, a thirty-fourth resistor R34, a thirty-eighth resistor R38, and a thirty-third resistor R33. The first terminal of the first operational amplifier U1A is connected together with the thirty-first resistor R31 and the thirty-second resistor R32. The second terminal of the first operational amplifier U1A is connected to the output voltage attenuation signal terminal V_READ through the thirty-fourth resistor R34. The third terminal of the first operational amplifier U1A is connected to the second terminal of the first operational amplifier U1A through the thirty-eighth resistor R38. The third terminal of the first operational amplifier U1A is connected to the first node A through the thirty-third resistor R33.

[0055] Among them, the voltage at the first terminal of the first operational amplifier U1A is defined as the fifth voltage V5, the voltage at the first terminal of the first operational amplifier U1A is defined as the sixth voltage V6, and the voltage at the third terminal of the first operational amplifier U1A is defined as the second control signal V7.

[0056] like Figure 1 and Figure 2 As shown, the third control circuit 300 may include, but is not limited to: a twenty-eighth resistor R28, the first end of which is connected to a five-volt voltage terminal +5V, and the second end of which is connected to the first node A.

[0057] The voltage at the second terminal of the twenty-eighth resistor R28 is defined as the third control signal V8.

[0058] The working process of the segmented self-adjusting dummy load device is described below.

[0059] When the power supply is operating under no-load or light-load conditions, the first control signal V1, the second control signal V7, and the third control signal V8 are superimposed on the first terminal of the fifth operational amplifier U5A after voltage division. When the fifth operational amplifier U5A operates in the linear region, according to the virtual short rule, the voltage at the first terminal of the fifth operational amplifier U5A is equal to the voltage at the second terminal of the fifth operational amplifier U5A, that is, the fiftieth voltage V5A is equal to the sixtieth voltage V6A. Therefore, the current flowing through the power adjustment resistor RS1 is: I = U5A / RS1.

[0060] When the third operational amplifier U3B is operating in the linear region, based on the virtual short, the second voltage V2 and the third voltage V3 can be obtained as: V2 = V3 = 5 * R21 / (R21 + R23). Furthermore, since the current flowing through the twenty-fifth resistor R25 and the twenty-sixth resistor R26 is the same, the first control signal V1 can be obtained as: V1 = R26 * (V3 - V_READ) / R25.

[0061] Similarly, when the first operational amplifier U1A operates in the linear region, according to the virtual short, the fifth voltage V5 and the sixth voltage V6 can be obtained as: V6 = V5 = 5 * R31 / (R31 + R32). Since the current flowing through the thirty-fourth resistor R34 and the thirty-eighth resistor R38 is the same, the second control signal V7 can be obtained as: V7 = R38 * (V5 - V_READ) / R34.

[0062] In addition, the third control signal V8 is: V8 = (5*R37) / (R28+R37).

[0063] Therefore, the fiftieth voltage V5A is the superposition of the first control signal V1, the second control signal V7 and the third control signal V8, which can be obtained as: V5A=(V1*R37) / (R24+R37)+(5*R37) / (R28+R37)+(V7*R37) / (R33+R37).

[0064] The power of the dummy load is: P = VOUT * I ​​= VOUT * U5A / RS1. Substituting the 50th voltage V5A, we get: P = VOUT * [(V1 * R37) / (R24 + R37) + (5 * R37) / (R28 + R37) + (V7 * R37) / (R33 + R37)] / RS1.

[0065] The above describes the dummy load power when the power supply is operating under no-load or light-load conditions. The following describes the dummy load power when the power supply is operating at high voltage.

[0066] When the output voltage of the power supply is too high, the third operational amplifier U3B and the first operational amplifier U1A operate in the nonlinear region. The voltage at the inverting input of both of them is greater than the voltage at the non-inverting input. That is, the second voltage V2 is greater than the third voltage V3, the sixth voltage V6 is greater than the fifth voltage V5, and since it is powered by a single power supply, the voltages of the first control signal V1 and the second control signal V7 are zero.

[0067] Combining the aforementioned formula for calculating the fiftieth voltage V5A, only the voltage of the third control signal V8 is now output to the first terminal of the fifth operational amplifier U5A, i.e.: V5A=(5*R37) / (R28+R37).

[0068] At this time, the power of the dummy load is: P=VOUT*[(5*R37) / (R28+R37)] / RS1.

[0069] The following explanation will be based on the example of the output voltage being in the low-voltage range.

[0070] Assuming the twenty-first resistor R21 is 2KΩ and the twenty-third resistor R23 is 100KΩ, the voltage at the first terminal of the third operational amplifier U3B and the third voltage V3 are: V3=(5*R21) / (R21+R23)=5*2 / 102=0.0980V.

[0071] Since the output signal attenuation ratio of the output voltage attenuation signal terminal V_READ is 1 / 60, when the output signal of the output voltage attenuation signal terminal V_READ is less than the third voltage V3, the third operational amplifier U3B operates in the linear region; when the output signal of the output voltage attenuation signal terminal V_READ is greater than the third voltage V3, the third operational amplifier U3B operates in the nonlinear region. That is, when the output signal of the output voltage attenuation signal terminal V_READ is greater than the third voltage V3, the output voltage of the third operational amplifier U3B, i.e. the first control signal V1, is 0. It can be calculated that when the output voltage is VOUT=V3*60=5.88V, the V1 signal output is 0. It can be seen that after the third voltage V3 controls the output voltage to a certain value, the first control signal V1 is set to 0. The third voltage V3 is controlled by the ratio of the twenty-first resistor R21 and the twenty-third resistor R23. Therefore, adjusting the ratio of the twenty-first resistor R21 and the twenty-third resistor R23 can modulate the voltage operating range of the output voltage in the low voltage range. Adjusting the ratio of the twenty-fourth resistor R24, the twenty-fifth resistor R25, the twenty-sixth resistor R26, and the thirty-seventh resistor R37 can change the fiftieth voltage V5A. In other words, the power of the dummy load can be controlled by adjusting the ratio of the twenty-fourth resistor R24, the twenty-fifth resistor R25, the twenty-sixth resistor R26, and the thirty-seventh resistor R37.

[0072] Similarly, the control principle of the second control circuit 200 is the same as that of the first control circuit 100, and will not be repeated here.

[0073] From the above examples, it can be understood that at low or medium voltage levels, the voltage operating range of the dummy load can be adjusted by changing the ratio of resistors R21 and R23, and the ratio of resistors R31 and R32. Specifically, it can be adjusted to operate in the low or medium voltage range. The output power of the dummy load can be controlled by adjusting resistors R25, R26, R34, R38, R24, R28, R33, and R37. At high voltage levels, as mentioned earlier, the first control signal V1 and the second control signal V7 output are 0, and the third control signal V8 is a fixed value. As the output voltage continues to rise, the power of the dummy load increases linearly. The ratio of resistors R28 and R37 can be adjusted to maintain the dummy load at a lower power level.

[0074] like Figure 1 and Figure 2As shown, in some embodiments, the segmented self-adjusting dummy load device further includes: a high current control circuit 500; the high current control circuit 500 may include, but is not limited to: a 40th resistor R40 and a second diode D2, the first end of the 40th resistor R40 being connected to the output current attenuation signal terminal I_READ, the second end of the 40th resistor R40 being connected to the first end of the second diode D2, and the second end of the second diode D2 being connected to the second end of the fifth operational amplifier U5A.

[0075] Specifically, when the current of the power supply is detected to be greater than a certain value, the second diode D2 will conduct. After conduction, the voltage generated by the 40th resistor R40 is superimposed on the second terminal of the fifth operational amplifier U5A, causing the voltage at the inverting terminal of the fifth operational amplifier U5A to be greater than the voltage at the non-inverting terminal. Since it is powered by a single power supply, it outputs a low level, thereby disconnecting the second field-effect transistor Q2 and turning off the dummy load.

[0076] like Figure 1 and Figure 2 As shown, in some embodiments, the segmented self-adjusting dummy load device further includes: a voltage drop acceleration control circuit 600; the voltage drop acceleration control circuit 600 may include, but is not limited to: a differentiating circuit 610 and a discharging circuit 620, wherein the first terminal of the differentiating circuit 610 is connected to the output voltage terminal VOUT+, the third terminal of the discharging circuit 620 is connected to the second terminal of the differentiating circuit 610, the first terminal of the discharging circuit 620 is connected to the 12-volt voltage terminal +12V, and the second terminal of the discharging circuit 620 is connected to the first terminal of the fifth operational amplifier U5A.

[0077] Specifically, the differentiating circuit 610 may include, but is not limited to: a fourth operational amplifier U4, a seventh capacitor C7, a twenty-second resistor R22, and a twenty-seventh resistor R27. The first terminal of the fourth operational amplifier U4 is grounded through the twenty-seventh resistor R27. The second terminal of the fourth operational amplifier U4 is connected to the output voltage terminal VOUT+ through the seventh capacitor C7. The third terminal of the fourth operational amplifier U4 is connected to the second terminal of the fourth operational amplifier U4 through the twenty-second resistor R22. The third terminal of the fourth operational amplifier U4 is connected to the third terminal of the discharge circuit 620.

[0078] The discharge circuit 620 may include, but is not limited to, a first transistor, a twentieth resistor, and a first diode. The first terminal of the first transistor is connected to the 12V voltage terminal +12V, the second terminal of the first transistor is connected to the first node A, the third terminal of the first transistor is connected to the third terminal of the fourth operational amplifier U4, the twentieth resistor is connected between the first and third terminals of the first transistor, and the first diode is connected in parallel with the twentieth resistor.

[0079] Specifically, when the fourth operational amplifier U4 detects a negative slope change in the output voltage, i.e., during the process of adjusting the output voltage from high to low, the seventh capacitor C7 begins to discharge, and current flows through the third terminal of the first transistor. At this time, the first transistor conducts, and current flows from the emitter to the collector, raising the fiftieth voltage V5A. This rapidly discharges the dummy load, adjusting the output voltage to the newly set voltage, accelerating the response time of the control system, and enabling the system to quickly reach equilibrium. Simultaneously, it effectively prevents accidental electric shock to the operator when the power is off due to incomplete discharge, greatly improving safety. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more.

[0080] It should also be understood that, in the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0081] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0082] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0083] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described below are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through some interfaces, apparatuses, or units, or they may be electrical, mechanical, or other forms of connection.

[0084] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0085] The above description is merely a preferred embodiment of this application and does not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A segmented self-adjusting dummy load device, characterized by, The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device.

2. The segmented self-adjusting dummy load device of claim 1, wherein, The application relates to a segmented self-adjusting dummy load device.

3. The segmented self-adjusting dummy load device of claim 2, wherein, The application relates to a segmented self-adjusting dummy load device.

4. The segmented self-adjusting dummy load device of claim 1, wherein, The application relates to a segmented self-adjusting dummy load device.

5. The segmented self-adjusting dummy load device of claim 4, wherein, The application relates to a segmented self-adjusting dummy load device.

6. The segmented self-adjusting dummy load device of claim 1, wherein, The application relates to a segmented self-adjusting dummy load device.

7. The segmented self-adjusting dummy load device of any one of claims 1 to 6, wherein, The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. 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The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self-adjusting dummy load device. The application relates to a segmented self The large current control circuit comprises a 40th resistor and a 2nd diode, a first end of the 40th resistor is connected with an output current attenuation signal end, a second end of the 40th resistor is connected with a first end of the 2nd diode, and a second end of the 2nd diode is connected with a second end of the 5th operational amplifier.

8. The segmented self-adjusting dummy load device of any one of claims 1 to 6, wherein, The segmented self-adjusting dummy load device further comprises a voltage drop acceleration control circuit. The voltage drop acceleration control circuit comprises a differential circuit and a discharge circuit, a first end of the differential circuit is connected with an output voltage end, a third end of the discharge circuit is connected with a second end of the differential circuit, a first end of the discharge circuit is connected with a 12-volt voltage end, and a second end of the discharge circuit is connected with a first end of the 5th operational amplifier.

9. The segmented self-adjusting dummy load device of claim 8, wherein, The differential circuit comprises a 4th operational amplifier, a 7th capacitor, a 22nd resistor and a 27th resistor, a first end of the 4th operational amplifier is grounded through the 27th resistor, a second end of the 4th operational amplifier is connected with an output voltage end through the 7th capacitor, a third end of the 4th operational amplifier is connected with the second end of the 4th operational amplifier through the 22nd resistor, and the third end of the 4th operational amplifier is connected with a third end of the discharge circuit.

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