A correction system for a DC power supply circuit

Abstract

This invention discloses a correction system for a DC power supply circuit, comprising: a sensing module electrically connected to the power supply circuit; a conversion module electrically connected to the sensing module; a calculation module electrically connected to the conversion module; and a compensation module electrically connected to the calculation module. The sensing module is connected in series in the power supply circuit, sensing and acquiring the instantaneous signal of the power supply circuit in real time, and transmitting the instantaneous signal to the conversion module. The conversion module converts the instantaneous current into an analog value representing the instantaneous signal and transmits it to the calculation module. The calculation module uses the analog value to calculate the missing value of the instantaneous current in a preset algorithm, and transmits the missing value to the compensation module. The compensation module outputs a compensation current to the power supply circuit based on the missing value, ensuring that the power supply circuit outputs a constant current at any time. This achieves maintenance of the power supply circuit without affecting the normal operation of electronic equipment, avoiding the waste caused by repairing or replacing the power supply, and reducing costs.

Description

Technical Field

[0001] This invention relates to the field of power supply circuit testing technology, and in particular to a correction system for DC power supply circuits. Background Technology

[0002] A power supply circuit is a circuit design that provides power to electronic components in electronic devices. It uses various circuit forms and has different characteristics, including both AC and DC power supplies.

[0003] During operation, the power supply circuit provides continuous power to the electronic device in real time. However, due to long-term operation, the power supply circuit may gradually or even frequently experience current drift and voltage instability, which may affect the normal operation of the electronic device.

[0004] The existing technology solves the above problems by repairing or replacing the power supply. Repairing requires inspecting and checking each electronic component in the power supply circuit to pinpoint the fault. This method is time-consuming, and sometimes the decision to replace the power supply is made after identifying the fault, leading to excessive repair time and affecting the normal operation of electronic equipment. However, replacing the power supply frequently results in wasted power and increased costs. In short, regardless of the method used, all methods rely on repair to maintain the power supply circuit and cannot guarantee that the output current of the power supply circuit remains constant in real time. Summary of the Invention

[0005] To address the technical problem that the aforementioned maintenance methods for power supply circuits cannot ensure that the output current of the power supply circuit remains constant in real time, this invention provides a correction system for DC power supply circuits. This system uses a sensing module, a calculation module, and a compensation module to detect and calculate the instantaneous current of the power supply circuit and outputs a compensation current to the power supply circuit.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0007] A correction system for a DC power supply circuit, comprising:

[0008] The sensing module is electrically connected to the power supply circuit and is used to sense the instantaneous signal output by the power supply circuit.

[0009] The conversion module, electrically connected to the sensing module, is used to convert instantaneous signals into characteristic quantities, which are analog values ​​representing instantaneous signals.

[0010] The calculation module, electrically connected to the conversion module, is used to acquire feature quantities and calculate the difference between the feature quantities and the preset quantities according to a preset algorithm to obtain the missing quantity value. The preset quantity is an analog quantity value that is preset in the calculation module to represent the output current of the power supply circuit.

[0011] The compensation module, electrically connected to the calculation module, is used to output a compensation current based on the missing value to eliminate the drift of the power supply circuit.

[0012] Compared with existing technologies, this invention has the following advantages: The sensing module is connected in series in the power supply circuit, real-time sensing and acquisition of the instantaneous signal of the power supply circuit, and transmits the instantaneous signal to the conversion module. The conversion module converts the instantaneous current into an analog value representing the instantaneous signal and transmits it to the calculation module. The calculation module uses the analog value to calculate the missing value of the instantaneous current in a preset algorithm, and transmits the missing value to the compensation module. The compensation module outputs a compensation current to the power supply circuit based on the missing value, ensuring that the power supply circuit outputs a constant current at any time. This achieves maintenance of the power supply circuit, directly replacing the method of repairing or replacing the power supply circuit. It not only does not affect the normal operation of electronic equipment, but also avoids the waste caused by repairing or replacing the power supply, reducing costs.

[0013] More preferably, the sensing module includes:

[0014] The copper foil is connected in series with the power supply circuit. When the current from the power supply circuit passes through the copper foil, the copper foil generates a magnetic field.

[0015] The sensor circuit is electrically connected to the copper foil and is used to induce a voltage signal in the magnetic field. The voltage signal is then processed to obtain an instantaneous signal, which is a signal that directly reflects the instantaneous current flowing through the copper foil.

[0016] By adopting the above technical solution, an instantaneous magnetic field is generated by the instantaneous current flowing through the copper foil. The sensor circuit induces an instantaneous voltage signal in the instantaneous magnetic field and processes it to obtain a transformed current signal, thereby achieving the purpose of collecting the instantaneous current in the power supply circuit.

[0017] More preferably, the copper foil is connected to the positive and negative terminals of the power supply circuit respectively, in order to obtain the current output by the power supply circuit and generate a magnetic field.

[0018] The above technical solution is used to obtain the current flowing through the copper foil in the power supply circuit.

[0019] More preferably, the sensor circuit includes:

[0020] A Hall sensor, connected to copper foil, is used to sense and acquire voltage signals.

[0021] The chopper circuit, electrically connected to one output terminal of the Hall sensor, is used to convert the instantaneous current flowing through the copper foil into an instantaneous signal, which is an instantaneous pulse wave signal.

[0022] The filtering circuit, electrically connected to the other output terminal of the Hall sensor, is used to filter the current flowing through the Hall sensor.

[0023] Using the above technical solution, the voltage signal collected by the Hall sensor is transmitted to the chopper circuit. The chopper circuit processes the voltage signal to obtain an instantaneous signal with a pulse wave. At the same time, a filter circuit filters the instantaneous current and outputs an instantaneous signal.

[0024] Further optimization results in the chopper circuit including:

[0025] The first capacitor is electrically connected to one output terminal of the Hall sensor.

[0026] The field-effect transistor is connected in series with the first capacitor.

[0027] A resistor, connected in series with a field-effect transistor and then to a power supply circuit, is used to output a pulse wave signal.

[0028] Using the above technical solution, the instantaneous current is chopped by a field-effect transistor, a first capacitor, and a resistor.

[0029] Further optimization results in a filter circuit comprising:

[0030] The second capacitor is electrically connected to the other end of the Hall sensor and is used to filter the current output by the Hall sensor.

[0031] The above technical solution is adopted to eliminate interference signals in the current signal.

[0032] Further optimization involves using an analog-to-digital converter in the conversion module to convert instantaneous signals into digital values ​​representing the magnitude of the current, providing a basis for calculating the missing values ​​of the instantaneous current.

[0033] Further optimization is performed, with the preset algorithm as follows:

[0034] I = (I1 + I2 + I3 + ... + In) / n (1)

[0035] I△=|I-Imean| (2);

[0036] Where I is the average current, I1 is the first instantaneous current, I2 is the second instantaneous current, I3 is the third instantaneous current, In is the nth instantaneous current, IΔ is the missing current, and Imean is the characteristic current.

[0037] Using the above technical solution, the average current of the power supply circuit is calculated by formula (1), and the difference between the instantaneous current and the average current is calculated by formula (2). The missing value of the instantaneous current can be obtained, which provides an accurate basis for the compensation module to output the compensation current.

[0038] Further optimization is made so that the characteristic current is any one of the first instantaneous current, the second instantaneous current, the third instantaneous current, and the nth instantaneous current.

[0039] By adopting the above technical solution, the instantaneous current at any time can be obtained, and then the current loss value at any time can be calculated by a preset algorithm, and then the compensation current at any time can be obtained from the compensation module.

[0040] Further optimization involves using a current compensation circuit for the compensation module.

[0041] By adopting the above technical solution, the current output by the power supply circuit can be compensated to ensure that the instantaneous current is constant at any time, thus ensuring the normal operation of electronic equipment. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of this embodiment.

[0043] Figure 2 This is a schematic diagram of the sensing module.

[0044] Figure 3 This is the circuit diagram for the sensor circuit.

[0045] Reference numerals: 1-Power supply circuit; 2-Sensing module; 21-Copper foil; 22-Hall sensor; 3-Conversion module; 4-Calculation module; 5-Compensation module; C1-First capacitor; C2-Second capacitor; D1-Field effect transistor; R1-Resistor. Detailed Implementation

[0046] During operation, the power supply circuit provides continuous power to the electronic device in real time. However, due to long-term operation, the power supply circuit may gradually or even frequently experience unstable output current and voltage, which may affect the normal operation of the electronic device.

[0047] The existing technology solves the above problems by repairing or replacing the power supply. Repairing requires inspecting and checking each electronic component in the power supply circuit to pinpoint the fault. This method is time-consuming, and sometimes the decision to replace the power supply is made after identifying the fault, leading to excessive repair time and affecting the normal operation of electronic equipment. However, replacing the power supply frequently results in wasted power and increased costs. In short, regardless of the method used, all methods rely on repair to maintain the power supply circuit and cannot guarantee that the output current of the power supply circuit remains constant in real time.

[0048] To address the aforementioned technical problems, this application proposes the following design and concept: a system is needed that can detect the power circuit current in real time and take timely compensation measures during the normal operation of electronic devices, so as to ensure that the current output by the power circuit is constant at any time, thereby ensuring the normal and safe operation of electronic devices.

[0049] The following is in conjunction with the appendix Figure 1 , Figure 2 as well as Figure 3 The present invention will be described in further detail below.

[0050] A correction system for a power supply circuit 1, comprising:

[0051] The sensing module 2 is electrically connected to the power supply circuit 1 and is used to sense the instantaneous signal output by the power supply circuit 1.

[0052] The conversion module 3 is electrically connected to the sensing module 2 and is used to convert the instantaneous signal into a characteristic quantity, which is an analog value representing the instantaneous signal.

[0053] The calculation module 4 is electrically connected to the conversion module 3. It is used to acquire the feature quantity and calculate the difference between the feature quantity and the preset quantity according to the preset algorithm to obtain the missing quantity value. The preset quantity is an analog quantity value that is preset in the calculation module 4 to represent the output current of the power supply circuit 1.

[0054] The compensation module 5, which is electrically connected to the calculation module 4, is used to output a compensation current based on the missing value to compensate for the drift of the power supply circuit 1.

[0055] Sensing module 2 is connected in series in power supply circuit 1 to sense and collect instantaneous signals from power supply circuit 1 in real time. The instantaneous signals are then transmitted to conversion module 3. Conversion module 3 converts the instantaneous current into an analog value representing the instantaneous signal and transmits it to calculation module 4. Calculation module 4 uses the analog value to calculate the missing value of the instantaneous current using a preset algorithm and transmits the missing value to compensation module 5. Compensation module 5 outputs a compensation current to power supply circuit 1 based on the missing value, ensuring that power supply circuit 1 outputs a constant current at any given time. This method allows for maintenance of power supply circuit 1, directly replacing the need for repair or replacement. It not only does not affect the normal operation of electronic equipment but also avoids the waste associated with repair or replacement, thus reducing costs.

[0056] In one specific embodiment, such as Figure 2 As shown, the sensing module 2 includes:

[0057] Copper foil 21 is connected in series with power supply circuit 1. When current from power supply circuit 1 passes through copper foil 21, copper foil 21 is used to generate a magnetic field.

[0058] The sensor circuit is electrically connected to the copper foil 21 and is used to induce a voltage signal in the magnetic field and process the voltage signal to obtain an instantaneous signal. The instantaneous signal is a signal that directly reflects the current flowing through the copper foil 21 instantaneously.

[0059] In this way, the instantaneous magnetic field is generated by the instantaneous current flowing through the copper foil 21. The sensor circuit induces the instantaneous voltage signal in the instantaneous magnetic field and processes it to obtain the transformed current signal, thereby achieving the purpose of collecting the instantaneous current in the power supply circuit 1.

[0060] In one specific embodiment, such as Figure 2 As shown, the copper foil 21 is connected to the positive and negative terminals of the power supply circuit 1 respectively, and is used to obtain the current output by the power supply circuit 1 and generate a magnetic field, thereby obtaining the current flowing through the copper foil 21 in the power supply circuit 1.

[0061] In one specific embodiment, such as Figure 3 As shown, the sensor circuit includes:

[0062] Hall sensor 22, connected to copper foil 21, is used to sense and acquire voltage signals. Specifically, Hall sensor 22 is an ACS712 surface mount sensor. Its Vcc power supply is 5V, and the power supply signal Vout is between 0.5V and 4.5V.

[0063] The chopper circuit is electrically connected to one output terminal of the Hall sensor 22 and is used to convert the instantaneous current flowing through the copper foil 21 into an instantaneous signal, which is an instantaneous pulse wave signal.

[0064] The filtering circuit is electrically connected to the other output terminal of the Hall sensor 22. It is used to filter the current flowing through the Hall sensor 22. The voltage signal collected by the Hall sensor 22 is transmitted to the chopper circuit. The chopper circuit chops the voltage signal to obtain an instantaneous signal with a pulse wave. At the same time, the filtering circuit filters the instantaneous current and outputs an instantaneous signal.

[0065] In one specific embodiment, the chopper circuit includes:

[0066] The first capacitor C1 is electrically connected to one output terminal of the Hall sensor 22.

[0067] The field-effect transistor D1 is connected in series with the first capacitor C1.

[0068] Resistor R1 is connected in series with field-effect transistor D1 and connected to power supply circuit 1 to output pulse wave signal.

[0069] The instantaneous current is chopped using a field-effect transistor D1, a first capacitor C1, and a resistor R1.

[0070] In one specific embodiment, the filter circuit includes:

[0071] The second capacitor C2 is electrically connected to the other end of the Hall sensor 22 and is used to filter the current output by the Hall sensor 22 to eliminate interference signals in the current signal.

[0072] In one specific embodiment, the conversion module 3 is an analog-to-digital converter used to convert the instantaneous signal into a digital value representing the magnitude of the current, thereby converting the analog quantity of the instantaneous signal representing the current into a digital quantity, and providing an accurate digital value for calculating the missing value of the instantaneous current.

[0073] Further optimization is performed, with the preset algorithm as follows:

[0074] I = (I1 + I2 + I3 + ... + In) / n (1)

[0075] I△=|I-Imean| (2);

[0076] Where I is the average current, I1 is the first instantaneous current, I2 is the second instantaneous current, I3 is the third instantaneous current, In is the nth instantaneous current, IΔ is the missing current, and Imean is the characteristic current.

[0077] The average current of power supply circuit 1 is calculated by formula (1), and the difference between instantaneous current and average current is calculated by formula (2). The missing value of instantaneous current can be obtained, which provides an accurate basis for compensation module 5 to output compensation current.

[0078] In one specific embodiment, the characteristic current is any one of the first instantaneous current, the second instantaneous current, the third instantaneous current, and the nth instantaneous current, so that the instantaneous current at any time can be obtained, and then the current missing value at any time can be calculated by a preset algorithm, and then the compensation current at any time can be obtained from the compensation module 5.

[0079] In one specific embodiment, the compensation module 5 is selected as a current compensation circuit.

[0080] By adopting the above technical solution, the current output by the power supply circuit 1 is compensated, ensuring that the instantaneous current is constant at any time, and ensuring the normal operation of the electronic equipment.

[0081] This specific embodiment is merely an explanation of the invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of protection of this invention, they are protected by patent law.

Claims

1. A correction system for a DC power supply circuit, characterized in that, include: The sensing module (2) is electrically connected to the power supply circuit (1) and is used to sense the instantaneous signal output by the power supply circuit (1); The sensing module (2) includes: a copper foil (21) connected in series with the power supply circuit (1), which generates a magnetic field when the current from the power supply circuit (1) passes through the copper foil (21); and a sensor circuit electrically connected to the copper foil (21), which induces a voltage signal in the magnetic field and processes the voltage signal to obtain an instantaneous signal, which is a signal that directly reflects the instantaneous current flowing through the copper foil (21); the instantaneous magnetic field is generated by the instantaneous current flowing through the copper foil (21), and the sensor circuit induces an instantaneous voltage signal in the instantaneous magnetic field. The voltage signal and the transformed current signal obtained after processing it are used to collect the instantaneous current in the power supply circuit. The sensor circuit includes: a Hall sensor (22), connected to the copper foil (21), for sensing and collecting the voltage signal; a chopper circuit, electrically connected to one output terminal of the Hall sensor (22), for converting the instantaneous current flowing through the copper foil (21) into an instantaneous signal, the instantaneous signal being an instantaneous pulse wave signal; and a filter circuit, electrically connected to the other output terminal of the Hall sensor (22), for filtering the current flowing through the Hall sensor (22). The conversion module (3) is electrically connected to the sensing module (2) and is used to convert the instantaneous signal into a feature quantity, wherein the feature quantity is an analog value representing the instantaneous signal; The calculation module (4), electrically connected to the conversion module (3), is used to acquire the feature quantity and calculate the difference between the feature quantity and the preset quantity according to a preset algorithm to obtain the missing quantity value. The preset quantity is an analog quantity value that represents the output current of the power supply circuit (1) preset in the calculation module (4). The preset algorithm is as follows: I=(I 1+I 2+I 3+...+In) / n (1) I△=|II mean| (2); Where I is the average current, I1 is the first instantaneous current, I2 is the second instantaneous current, I3 is the third instantaneous current, In is the nth instantaneous current, IΔ is the missing current, and Imean is the characteristic current; The compensation module (5) is electrically connected to the calculation module (4) and is used to output a compensation current according to the missing value to eliminate the drift of the power supply circuit (1).

2. The correction system for the DC power supply circuit according to claim 1, characterized in that, The copper foil (21) is connected to the positive and negative terminals of the power supply circuit (1) respectively, and is used to obtain the current output by the power supply circuit (1) and generate a magnetic field.

3. The correction system for the DC power supply circuit according to claim 1, characterized in that, The chopper circuit includes: The first capacitor (C1) is electrically connected to one output terminal of the Hall sensor (22); A field-effect transistor (D1) is connected in series with the first capacitor (C1); A resistor (R1) is connected in series with the field-effect transistor and connected to the power supply circuit (1) to output the pulse wave signal.

4. The correction system for the DC power supply circuit according to claim 1, characterized in that, The filtering circuit includes: The second capacitor (C2) is electrically connected to the other end of the Hall sensor (22) and is used to filter the current output by the Hall sensor (22).

5. The correction system for the DC power supply circuit according to claim 1, characterized in that, The conversion module (3) is an analog-to-digital converter used to convert the instantaneous signal into a digital value representing the magnitude of the current.

6. The correction system for the DC power supply circuit according to claim 1, characterized in that, The characteristic current is any one of the first instantaneous current, the second instantaneous current, the third instantaneous current, and the nth instantaneous current.

7. The correction system for the DC power supply circuit according to claim 1, characterized in that, The compensation module (5) uses a current compensation circuit.

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