A suspended voltage regulating circuit and voltage regulating method thereof

Abstract

The present invention discloses a suspended voltage regulating circuit and a voltage regulating method thereof, comprising a power supply module providing an output voltage to a load, wherein the potential of the positive terminal of the output voltage remains unchanged; a suspended adjustment module increasing or decreasing the potential of the negative terminal of the output voltage; a DAC output module outputting positive and negative voltages to control the adjustment process of the suspended adjustment module; a voltage acquisition module acquiring the output voltage; and a control module adjusting the positive and negative voltages output by the DAC output module based on the output voltage acquired by the voltage acquisition module so that the suspended adjustment module adjusts the output voltage to the operating voltage required by the load. According to the suspended voltage regulating circuit of the present invention, by controlling and adjusting the voltage difference between the output voltage corresponding to the suspended voltage regulating module and the voltage transmitted to the load by the current limiting switch circuit, it can safely and reliably output high-precision, small-ripple positive and negative voltage values, reduce costs, and is more suitable for use in MLCC capacitor automated production line detection and testing machines, meeting various customer testing needs.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic application testing, and in particular to a suspended voltage regulating circuit and a voltage regulating method thereof. Background Art

[0002] With the advancement of science and technology and the widespread application of electronic technology, demand for smartphones, computers, and various household appliances is increasing. Various types of MLCC capacitors are widely used in the electronic field, and demand is gradually increasing, with daily production being astonishing. While ensuring the demand for MLCC capacitors, it is also necessary to strictly control a series of issues such as defective MLCC capacitors, reliability, performance, and voltage resistance. Therefore, the diversity and high-quality requirements of MLCC capacitors require test power supplies that can provide different precision power supplies. For example, when testing the voltage resistance characteristics of MLCC capacitors, a precision test power supply is often required to output different voltages multiple times to supply the MLCC capacitors with positive voltage charging, negative voltage charging, and rapid discharge.

[0003] In the existing technology, the test power supply voltage regulation method for MLCC capacitors almost always uses GND as the circuit material reference point to remain unchanged and adjust the output voltage value. The output voltage has a single direction and high ripple. When MLCC capacitors require forward and reverse charging voltage and rapid discharge during testing, it is often necessary to manually swap the line sequence or add multiple node detection and testing stations, resulting in complex production line testing processes and numerous components, increasing high costs, making it difficult to meet the needs of automated production line detection and testing machines, and even more difficult to promote and apply widely. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a suspended voltage regulating circuit and a regulating method thereof, which can enable the voltage regulating circuit to have a constant voltage output capability and control the voltage output direction.

[0005] On the one hand, according to an embodiment of the present invention, a floating voltage regulation circuit includes: a power supply module, which is used to provide an output voltage for a load, and the potential of the positive terminal of the output voltage remains unchanged; a floating adjustment module, which includes a first floating adjustment circuit and a second floating adjustment circuit, wherein the first floating adjustment circuit is used to increase the potential of the negative terminal of the output voltage, and the second floating adjustment circuit is used to reduce the potential of the negative terminal of the output voltage; a DAC output module, which is used to output a regulated voltage to control the adjustment process of the floating adjustment module; a voltage acquisition module, which is used to acquire the output voltage; and a control module, which is used to adjust the regulated voltage output by the DAC output module according to the output voltage acquired by the voltage acquisition module, so that the floating adjustment module adjusts the output voltage to the operating voltage required by the load.

[0006] According to some embodiments of the present invention, a current limiting switch module is further provided between the output voltage and the load. The current limiting switch module is also electrically connected to the control module. The control module can control the current limiting switch module to limit the output voltage.

[0007] According to some embodiments of the present invention, an amplification module is further connected between the DAC output module and the suspension adjustment module. The amplification module includes a proportional amplification circuit and an integral operational amplification circuit electrically connected in sequence. The proportional amplification circuit is used to amplify the voltage output by the DAC output module, and the integral operational amplification circuit is used to control the adjustment process of the suspension adjustment module according to the voltage output by the proportional amplification circuit.

[0008] According to some embodiments of the present invention, a driving module is further connected between the amplification module and the suspension adjustment module. The driving module includes a first driving circuit and a second driving circuit. The first driving circuit is used to drive and adjust the first suspension adjustment circuit, and the second driving circuit is used to drive and adjust the second suspension adjustment circuit.

[0009] According to some embodiments of the present invention, a shutdown module is also connected between the amplification module and the suspension adjustment module, the shutdown module is electrically connected to the control module, and the shutdown module includes a first shutdown circuit and a second shutdown circuit. The first shutdown circuit is used to shut down the first suspension adjustment circuit when the first suspension adjustment circuit is abnormal, and the second fast shutdown circuit is used to shut down the second suspension adjustment circuit when the second suspension adjustment circuit is abnormal.

[0010] According to some embodiments of the present invention, the floating voltage regulation circuit further includes a voltage regulation feedback circuit, and the voltage regulation feedback circuit is configured to send the output voltage to the amplification module.

[0011] According to some embodiments of the present invention, the power supply module includes an input power supply, a transformer circuit, a fuse circuit and a rectifier circuit electrically connected in sequence. The transformer circuit is used to transform the input power supply, and the fuse circuit is used to prevent abnormal burning of the circuit and improve the safety of the circuit; the rectifier circuit is used to rectify and filter the input power supply after transformation to obtain a DC voltage.

[0012] On the other hand, the present invention also includes a method for regulating a suspended voltage regulating circuit, comprising:

[0013] The power supply module provides an output voltage to the load and keeps the potential of the positive terminal of the output voltage constant;

[0014] The output voltage is collected by a voltage collection module, and the collection result is fed back to the control module;

[0015] The control module controls the DAC output module to output a regulated voltage according to the acquisition result;

[0016] The suspension adjustment module adjusts the potential of the negative terminal of the output voltage according to the adjustment voltage, so as to adjust the output voltage to the working voltage required by the load.

[0017] According to some embodiments of the present invention, before the step of the power supply module providing an output voltage to a load and keeping the potential of the positive terminal of the output voltage constant, a zero calibration process is further included. The zero calibration process includes the following steps:

[0018] The DAC output module outputs a voltage of 0V to the suspension adjustment module;

[0019] Collecting the output voltage at this time by the voltage collection module;

[0020] The control module adjusts the regulated voltage output by the DAC output module based on a comparison result of the output voltage with a first threshold and a second threshold, so that the suspension adjustment module adjusts the output voltage to between the first threshold and the second threshold; wherein the first threshold is greater than the second threshold.

[0021] The control module adjusts the regulated voltage output by the DAC output module in a minimum resolution unit according to whether the output voltage is within a straight line range, so that the suspension adjustment module adjusts the output voltage to approximately a straight line level, and saves the regulated voltage at this time as the initial output value of the DAC output module;

[0022] According to some embodiments of the present invention, the control module adjusts the regulated voltage output by the DAC output module based on a comparison result of the output voltage with the first threshold and the second threshold, so that the suspension adjustment module adjusts the output voltage to between the first threshold and the second threshold, specifically including:

[0023] When the output voltage is greater than the first threshold, the control module controls the DAC output module to output a positive voltage, so that the potential of the negative end of the output voltage increases; when the output voltage is less than the second threshold, the control module controls the DAC output module to output a negative voltage, so that the potential of the negative end of the output voltage decreases; and the above process is repeated until the output voltage stabilizes between the first threshold and the second threshold.

[0024] According to some embodiments of the present invention, the control module adjusts the regulated voltage output by the DAC output module in minimum resolution units based on whether the output voltage is within a straight line range, so that the suspension adjustment module adjusts the output voltage to approximately a straight line level, and saves the regulated voltage at this time as the initial output value of the DAC output module, specifically including:

[0025] When the output voltage gradually increases, the control module controls the DAC output module to output a positive voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually increases; when the output voltage gradually decreases, the control module controls the DAC output module to output a negative voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually decreases; the above process is repeated until the output voltage stabilizes within the straight line range, and the voltage value output by the voltage module at this time is saved as the initial output value of the DAC output module.

[0026] The floating voltage regulating circuit and the regulating method thereof according to the embodiments of the present invention have at least the following beneficial effects:

[0027] By adopting reference point suspension movement adjustment technology and real-time acquisition and monitoring technology, the potential of the positive terminal of the output voltage remains unchanged, while the potential of the negative terminal of the output voltage is adjusted through the suspension adjustment module, and finally the output voltage is adjusted to the operating voltage required by the load. This circuit has constant voltage output capability and can safely and reliably output high-precision, small-ripple positive and negative voltage values, thereby reducing the number of detection and testing stations, simplifying the production line's automated testing process, reducing components, and reducing costs. It is more suitable for use in MLCC capacitor automated production line detection and testing machines to meet customers' various testing needs.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0030] Figure 1 This is a structural block diagram of a suspension voltage regulating circuit according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the overall structure of a suspended voltage regulating circuit according to an embodiment of the present invention;

[0032] Figure 3 Schematic diagram of the circuit structure of a suspended voltage regulating circuit according to an embodiment of the present invention;

[0033] Figure 4 Schematic diagram of a first equivalent model of a topological structure of a floating voltage regulating circuit according to an embodiment of the present invention;

[0034] Figure 5 Schematic diagram of a second equivalent model of the topological structure of a floating voltage regulating circuit according to an embodiment of the present invention;

[0035] Figure 6 This is a waveform diagram of the output voltage and time of a DAC output module and a suspension adjustment module of a suspension voltage regulation circuit according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of a corresponding curve of the charging voltage of the integral capacitor and time when the suspension adjustment module outputs a positive voltage in a suspension voltage regulation circuit according to an embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of a corresponding curve of the charging voltage of the integral capacitor and time when the suspension adjustment module outputs a negative voltage in a suspension voltage regulation circuit according to an embodiment of the present invention;

[0038] Figure 9 This is a flow chart of a method for regulating a suspended voltage regulating circuit according to an embodiment of the present invention;

[0039] Figure 10 The figure is a flow chart of a zero calibration process of a floating voltage regulating circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0044] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0045] Reference Figure 1 An embodiment of the present invention provides a floating voltage regulation circuit, comprising a power supply module for providing an output voltage to a load, wherein the potential of the positive terminal of the output voltage remains unchanged; a floating adjustment module, comprising a first floating adjustment circuit and a second floating adjustment circuit, wherein the first floating adjustment circuit is used to increase the potential of the negative terminal of the output voltage, and the second floating adjustment circuit is used to reduce the potential of the negative terminal of the output voltage; a DAC output module for outputting positive and negative voltages to control the adjustment process of the floating adjustment module; a voltage acquisition module for acquiring the output voltage; and a control module for adjusting the positive and negative voltages output by the DAC output module based on the output voltage acquired by the voltage acquisition module, so that the floating adjustment module adjusts the output voltage to the operating voltage required by the load.

[0046] By adopting reference point suspension movement adjustment technology and real-time acquisition and monitoring technology, the potential of the positive terminal of the output voltage remains unchanged, while the potential of the negative terminal of the output voltage is adjusted through the suspension adjustment module, and finally the output voltage is adjusted to the operating voltage required by the load. This circuit has constant voltage output capability and can safely and reliably output high-precision, small-ripple positive and negative voltage values, thereby reducing the number of detection and testing stations, simplifying the production line's automated testing process, reducing components, and reducing costs. It is more suitable for use in MLCC capacitor automated production line detection and testing machines to meet customers' various testing needs.

[0047] Reference Figure 2 and Figure 3As an optional embodiment, the power supply module includes an input power supply, a transformer circuit and a rectifier circuit electrically connected in sequence, the transformer circuit is used to transform the input power supply, and the rectifier and filter unit is used to rectify and filter the voltage converted by the transformer circuit to obtain a corresponding DC voltage, wherein the transformer circuit includes a transformer T1 and a transformer T2, and a fuse FU1 is further connected between the rectifier circuit and the transformer T1, and a fuse FU2 is further connected between the rectifier circuit and the second transformer T2. The third pin of the primary side same-name terminal of the transformer T1 is connected to the live wire L of the input power supply, the fourth pin of the primary side same-name terminal of the transformer T1 is connected to the neutral wire N of the input power supply, the first pin of the secondary side same-name terminal of the transformer T1 is connected to one end of the fuse FU1, and the second pin of the secondary side same-name terminal of the transformer T1 is connected to the rectifier circuit; the third pin of the primary side same-name terminal of the transformer T2 is connected to the live wire L of the input power supply, the third pin of the primary side same-name terminal of the transformer T2 is connected to the neutral wire N of the input power supply, the first pin of the secondary side same-name terminal of the transformer T2 is connected to one end of the fuse FU2, and the second pin of the secondary side same-name terminal of the transformer T2 is connected to the rectifier circuit.

[0048] The rectifier circuit includes a first rectifier circuit and a second rectifier circuit, wherein the first rectifier circuit includes a bridge rectifier unit D1 and a capacitor C2, and the second rectifier circuit includes a bridge rectifier unit D5 and a capacitor C3; the first pin of the bridge rectifier unit D1 is connected to the drain of the MOS tube Q1, the second pin of the bridge rectifier unit D1 is connected to the other end of the fuse FU1, the third pin of the bridge rectifier unit D1 is connected to the second pin of the secondary side of the transformer T1, and the fourth pin of the bridge rectifier unit D1 is connected to the drain of the MOS tube Q1. The positive electrode of capacitor C2 is connected to the first pin of bridge rectifier unit D1, and the negative electrode of capacitor C2 is connected to the positive electrode of capacitor C3; the 1st pin of bridge rectifier unit D1 is connected to the 4th pin of bridge rectifier unit D1, the 2nd pin of bridge rectifier unit D1 is connected to the other end of fuse FU2, the 3rd pin of bridge rectifier unit D1 is connected to the 4th pin of secondary side of transformer T2, and the 4th pin of bridge rectifier unit D5 is connected to the negative electrode of capacitor C3 in the circuit.

[0049] A current limiting switch module is also provided between the DAC output module and the load. The current limiting switch module is electrically connected to the control module. The control module can control the current limiting switch module to limit the output voltage. The current limiting switch module used in this embodiment is a bidirectional current limiting switch module, including a bidirectionally settable current limiting value circuit and an output shutdown circuit. The bidirectionally settable current limiting value circuit facilitates the user to set the output current limit to prevent the output current from being too high and burning the load; the output shutdown circuit is used to suspend the voltage regulation circuit for zero calibration or the voltage regulation process is abnormal, resulting in burning the load, thereby improving the reliability and safety of the circuit.

[0050] As an optional embodiment, an amplification module is further connected between the DAC output module and the suspension adjustment module. The amplification module includes a proportional amplification circuit and an integral operational amplification circuit electrically connected in sequence. The proportional amplification circuit is used to amplify the adjustment voltage output by the DAC output module. The integral operational amplification circuit is used to control the adjustment process of the suspension adjustment module according to the voltage output by the proportional amplification circuit. Furthermore, the same-direction proportional amplification module includes a proportional amplification circuit and a filtering circuit. The same-direction proportional amplification circuit is used to amplify the voltage output by the DAC output module according to a certain proportion and improve the anti-interference ability of the DAC output module, and to feed back the output of the suspension adjustment module. Voltage value, the filtering circuit is used to reduce the interference of the output voltage on the integral operational amplifier circuit, and the feedback circuit participates in the software zero calibration, voltage regulation process and constant voltage output; wherein, the in-direction proportional amplification unit is respectively connected to the DAC output module and the filtering circuit, the in-direction proportional amplification unit includes an operational amplifier IC4, a resistor R13 and a resistor R18, the output end of the DAC output module is connected to the in-direction input end of the operational amplifier IC4, the inverting input end of the operational amplifier IC4 is connected to one end of the resistor R18 and one end of the resistor R13, the output end of the amplifier IC4 and the other end of the resistor R13 are both connected to one end of the resistor R22, and the other end of the resistor R18 is grounded.

[0051] The integrating operational amplifier circuit includes an operational amplifier IC1, a resistor R5, a potentiometer R1, a capacitor C1, a diode D3, and a diode D4. The anode of the diode D3 and the cathode of the diode D4 are both connected to the non-inverting input terminal of the operational amplifier IC1, the cathode of the diode D3 and the anode of the diode D4 are both grounded, one end of the resistor R5, one end of the potentiometer R1, and one end of the capacitor C1 are all connected to the inverting input terminal of the operational amplifier IC1, the other end of the resistor R5 is grounded, the other end of the potentiometer R1, the other end of the capacitor C1, and the output terminal of the operational amplifier IC1 are all connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the drive module;

[0052] It is worth noting that resistor R6 is a current limiting resistor, which is used to prevent the output voltage of the integral operational amplifier circuit from being too high, causing a sudden increase in the current of the voltage regulating circuit and burning the voltage regulating circuit, thereby further improving the stability of the input voltage of the suspension adjustment module.

[0053] The driving module includes a first driving circuit and a second driving circuit for driving the suspension adjustment unit, wherein the first driving circuit includes a resistor R2, a resistor R4, a resistor R7, a resistor R8, a resistor R9, a resistor R11, a transistor Q2, a transistor Q3 and a capacitor C6; one end of the resistor R2 is connected to a DC power supply +12V, and the other end of the resistor R2 is connected to the third pin collector C of the transistor Q2; one end of the resistor R4 is connected to a DC power supply +12V, and the other end of the resistor R4 is connected to the third pin collector C of the transistor Q2; one end of the resistor R7 is connected to the resistor The other end of resistor R6 is connected, and the other end of resistor R7 is connected to the base electrode B of the first pin of transistor Q2; one end of resistor R9 and one end of resistor R11 are both connected to the emitter electrode E of the second pin of transistor Q2; the other end of resistor R9 is connected to the emitter electrode E of the second pin of transistor Q3; the other end of resistor R11 is connected to a DC power supply -12V; one end of resistor R8 and one end of capacitor C6 are both connected to the base electrode B of the first pin of transistor Q2, the other end of resistor R8 is connected to the suspension adjustment module, and the other end of capacitor C6 is connected to the collector electrode C of the third pin of transistor Q2;

[0054] The second driving circuit includes a resistor R12, a resistor R14, a resistor R17, a resistor R19, a resistor R25, a resistor R26, a resistor R27, a transistor Q4, a transistor Q6 and a capacitor C7; one end of the resistor R12 is connected to a DC power supply +12V, the other end of the resistor R12 and one end of the resistor R14 are connected to the second pin emitter E of the transistor Q4; the other end of the fourteenth resistor R14 is connected to the second pin emitter E of the transistor Q6, the first pin base B of the fourth transistor VT4 and one end of the capacitor C7 are connected to the suspension The floating adjustment module is connected, the other end of the capacitor C7, one end of the resistor R26 and one end of the resistor R27 are all connected to the 3rd pin collector C of the transistor Q6; the other end of the resistor R26 and one end of the resistor R25 are both connected to a -12V DC power supply, and the other end of the resistor R25 is connected to the 3rd pin collector C of the transistor Q4; one end of the resistor R17 is connected to the other end of the resistor R6, and the other end of the resistor R17 is connected to the 1st pin base B of the transistor Q4, and one end of the resistor R26 and one end of the resistor R27 are also connected to the shutdown module.

[0055] The suspension adjustment module includes a first suspension adjustment circuit, a second suspension adjustment circuit, and a voltage regulation feedback circuit. The first suspension adjustment circuit is used to reduce the output voltage, and the second suspension adjustment circuit is used to increase the output voltage. The first suspension adjustment circuit and the second suspension adjustment circuit interact with each other to output the voltage value required by the user. The first suspension voltage regulation circuit includes a resistor R3, a diode D2, a MOS transistor Q1, and a resistor R10. One end of the resistor R3 and the cathode of the diode D2 are both connected to the gate G of the first pin of the MOS transistor Q1, the anode of the diode D2 is grounded, and the other end of the resistor R3 is connected to the first drive circuit. The drain D of the second pin of the MOS transistor Q1 is connected to the power supply module, and the source S of the MOS transistor is connected to one end of the resistor R10. The other end of the resistor R10 is grounded.

[0056] The second suspension adjustment circuit includes a diode D6, a MOS transistor Q7, a resistor R16, and a resistor R27. The anode of the diode D6 is connected to the gate G of the first pin of the MOS transistor Q7, and the cathode of the diode D6 is grounded. The drain D of the second pin of the MOS transistor Q7 is connected to the power supply module. One end of the resistor R16 and one end of the resistor R19 are both connected to the source S of the third pin of the MOS transistor Q3. The other end of the resistor R16 is grounded, and the other end of the resistor R27 is connected to the second drive circuit.

[0057] The voltage regulation feedback circuit includes a capacitor C5 and a resistor R24. One end of the capacitor C5 is connected to the suspension adjustment module, the other end of the capacitor C5 is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to the proportional amplification module. The voltage regulation feedback circuit is used to feed back the output voltage value of the suspension adjustment module.

[0058] The shutdown module includes a first shutdown circuit and a second shutdown circuit. The shutdown module is used to quickly shut down the first suspension adjustment circuit MOS tube Q1 and the second suspension adjustment circuit MOS tube Q7 when the circuit is abnormal, avoiding danger and improving safety. Furthermore, the first shutdown circuit includes a first optical coupler MOS IC2, the second shutdown circuit includes a second optocoupler MOSIC3, and the shutdown module also includes a resistor R15, a resistor R20, a resistor R21, and a MOS transistor Q5; wherein, the first pin of the first optocoupler MOSIC2 is also connected to a +5V DC power supply, the third pin of the first optocoupler MOSIC2 is grounded, the fourth pin of the first optocoupler MOSIC2 is connected to the first drive circuit, the second pin of the first optocoupler MOSIC2 is connected to the first pin of the second optocoupler MOSIC3, the second pin of the second optocoupler MOSIC3 is connected to one end of the resistor R15, the third pin of the second optocoupler MOSIC3 is connected to the second drive circuit, and the fourth pin of the optocoupler MOSIC3 is grounded; the other end of the resistor R15 is connected to the drain D of the MOS transistor Q5, the source S of the MOS transistor Q5 is grounded, and the gate G of the MOS transistor Q5 is connected to one end of the resistor R20 and one end of the resistor R21 respectively; the other end of the resistor R20 is connected to the fast shutdown IO interface of the control module; and the other end of the resistor R21 is grounded.

[0059] Those skilled in the art will appreciate that the control module is provided with a plurality of interfaces for connecting the display screen, the host computer, the button unit and the various functional modules in the circuit structure, etc., wherein the control module includes but is not limited to a single-chip microcomputer, a PLC, an FPGA, etc., and the communication interface includes a serial port, an RS485 interface, an SPI interface, an I2C interface, a parallel interface, a USB interface, a CAN interface, an Ethernet interface and a custom protocol communication interface, which are used to transmit information between the circuits of each module, and the button or keyboard is used to input various information parameters of the suspended voltage regulation circuit into the control unit for the convenience of user operation, and the host computer (PC) is used to send various information parameters of the configuration of the suspended voltage regulation circuit to the control unit, and the display screen includes an LCD display screen, an OLED display screen, a dot matrix display screen module, etc., which is used to display the configuration parameter information and various voltage regulation information sent by the keyboard or button.

[0060] Reference Figure 4 As an optional embodiment, the voltage of the DC power supply BT1 is UAB, the voltage of the DC power supply BT2 is UBC, the voltage difference across the potentiometer R1 is the voltage difference between points A and C in the circuit, that is, UAC=UAB+UBC; the voltage difference between the sliding contact point A of the potentiometer R1 and point D in the circuit is UAD; the voltage difference between the sliding contact point D of the potentiometer R1 and point C in the circuit is UDC;

[0061] When the sliding contact D of the potentiometer R1 moves toward point A in the circuit, the reference point GND of the circuit moves upward, the resistance between points AD gradually decreases, and the resistance between points DC gradually increases, that is, the voltage U between points AD AD Gradually decreases, the DC two-point voltage U DC Gradually increases, the voltage difference across the equivalent topology load resistor R2 is U BD Gradually decreases, that is, Vout gradually decreases;

[0062] When the sliding contact D of the potentiometer R1 moves toward point C in the circuit, the reference point of the circuit moves downward, the resistance between points AD decreases, and the resistance between points CD gradually decreases, that is, the voltage U between points AD AD Gradually increases, DC two-point voltage U DC Gradually decreases, the voltage difference across the equivalent topology load resistor R2 is U BD Gradually increases, that is, Vout gradually increases;

[0063] When the sliding contact point D of the potentiometer R1 remains stable and point D is the reference point, that is, the voltage difference across the equivalent topology load resistor R2 remains unchanged at the current value;

[0064] Since point B in the above circuit does not undergo physical changes, the sliding contact point D of the potentiometer R1 moves upward or downward, that is, the reference point moves, which changes the voltage difference across the equivalent topology load and the direction of current passing through the load, thereby achieving the purpose of suspended voltage regulation.

[0065] Reference Figure 5 , Figure 5 The working principle shown is the same as Figure 4 The same principle is shown; the voltage of the first DC power supply BT1 is UAB, the voltage of the second DC power supply BT2 is UBC, the voltage difference between the first DC power supply T1 and the second DC power supply T2 in series is the voltage difference between point A and point C in the circuit, that is, UAC=UAB+UBC; the voltage difference between the two ends of the first suspension adjustment circuit is the voltage difference between point A in the circuit and point D in the circuit, which is UAD; the voltage difference between the two ends of the second suspension adjustment circuit is the voltage difference between point D in the circuit and point C in the circuit, which is UDC;

[0066] When the first suspension adjustment circuit and the second suspension adjustment circuit work together to change the position of the reference point, the reference point moves so that there is a voltage difference between the two ends of the load. The voltage U between points AD AD Decrease, DC two-point voltage U DC Increase, the voltage difference across the equivalent topology load resistor R2 is U BD Decreases, that is, the output voltage Vout of the suspension adjustment module decreases;

[0067] When the first suspension adjustment circuit and the second suspension adjustment circuit work together to change the position of the reference point, the suspension movement causes a voltage difference between the two ends of the load, and the voltage U between points AD AD Increase, DC two-point voltage U DC Reduced, the voltage difference across the equivalent topology load resistor R2 is U BD Increases, that is, the output voltage Vout of the suspension adjustment module increases;

[0068] When the first suspension adjustment circuit and the second suspension adjustment circuit stop the voltage regulation process, the suspension voltage regulation circuit stops regulating the voltage, and the output voltage Vout of the suspension adjustment module remains unchanged;

[0069] As described above, there is no physical change at point B in the circuit, but changing the suspension movement process of point D in the circuit changes the voltage difference across the equivalent topology load and the direction of the current passing through the load.

[0070] The suspension adjustment module of the embodiment of the present invention further includes a zero calibration process, which includes but is not limited to the following steps:

[0071] By default, the shutdown module is turned on, the current limiting switch module is in the off state, and there is no voltage or current output to prevent abnormal zero calibration of the suspension adjustment module from burning the circuit and load;

[0072] The control module drives the DAC output module circuit to output zero volt voltage through the first communication interface, the shutdown module is turned off, and the suspension adjustment module starts zero calibration;

[0073] The control module starts the voltage acquisition module through the second communication interface to collect the output voltage Vout of the suspension adjustment module in real time. The control module collects the output voltage Vout data value of the suspension voltage regulation circuit in real time through the voltage acquisition module and performs a comprehensive judgment: if Vout is greater than 1V, the control module automatically sets the output voltage of the DAC output module to a positive value according to the absolute value of |Vout-VCC| (the larger the absolute value, the faster the adjustment speed); if the output voltage Vout is less than -1V, the control module automatically sets the output voltage of the DAC output module to a negative value according to the absolute value of |Vout-VCC| (the larger the absolute value, the faster the adjustment speed); when the output voltage Vout is within the range of -1V to +1V, the control module controls the DAC output module to output a zero volt voltage and stops the voltage regulation process;

[0074] The voltage acquisition module collects the output voltage Vout value in real time, and the control module calculates it in real time Value: If The DAC output module outputs a positive voltage value with minimum resolution and gradually increases the output at the set time interval; when (ie Vout is approximately a horizontal straight line), the control module records the parameter value (initial value) output by the suspension adjustment module zero calibration DAC output module and saves it; if The DAC output module outputs a negative voltage value with minimum resolution and gradually attenuates the output at the set time interval; when (i.e., Vout is approximately a horizontal straight line), the control module records and saves the output parameter value (initial value) of the suspension adjustment module zero-calibration DAC output module;

[0075] The zero calibration of the floating voltage regulating circuit is completed.

[0076] like Figure 3 When the AC input circuit inputs voltage to the suspension adjustment module, the suspension adjustment module enters the operating state, and its working process and working principle are as follows:

[0077] By default, the shutdown circuit is turned on, the current limiting switch circuit is closed, and there is no voltage or current output, preparing for the voltage regulation work of the suspension adjustment module;

[0078] The output voltage of the DAC output module is VCC1. It is understood by those skilled in the art that, by utilizing the “virtual short” principle of the operational amplifier, the input terminal VCC2 of the IC4 of the same-direction amplifier circuit is VCC1 (1).

[0079] Kirchhoff's Law (KCL) states:

[0080]

[0081] From formula (1) and formula (2), we can get:

[0082]

[0083] The proportional amplifier circuit IC4 outputs VCC3, which is filtered by the resistor R23 and capacitor C4 to obtain a voltage VCC4 (its direction is consistent with VCC3), which is then charged by the resistor R24 to the capacitor C5.

[0084] Since the input terminals of operational amplifier IC4 have high resistance, no current flows through the input pins; Kirchhoff's Current Law (KCL) gives:

[0085]

[0086] Since the resistance of resistor R23 in the filter circuit is relatively large and the energy storage value of capacitor C24 is very small, the current flowing through resistor R23 is very weak and can be ignored. The charging time of capacitor C4 is very fast and the charging current can also be ignored. In addition, the voltage at point VCC4 is almost 0V. Therefore, the above formula (4) can be obtained:

[0087]

[0088] From the above equations (3) and (5), the relationship between the output voltage of the voltage output circuit and the voltage on capacitor C5 is:

[0089]

[0090] When VCC1 in equation (6) is a constant, the integration time starts from 0, and after the integration time t, the output voltage VOUT on the capacitor C5 is The slope of the straight line is as follows: Figure 6 As shown;

[0091] According to the “virtual short” principle of the operational amplifier, the fourth potential point VCC4 in the integrating operational amplifier circuit is equal to the fifth potential point VCC5 (8);

[0092] Kirchhoff's Law (KCL) states:

[0093]

[0094] From the above formula (8) and formula (9), we can get:

[0095]

[0096] Formula (10) is a linear constant first-order non-homogeneous calculus equation, and its maximum charging voltage U of the first capacitor C1 is S :

[0097]

[0098] To sum up:

[0099] When the output voltage VCC1 of the DAC output module is zero, no current flows through the resistor R5, no current flows through the resistor R1, and no charge or discharge current flows through the capacitor C1. Therefore, the voltage outputted from the integral operation module IC1 to the potential point VCC6 is 0V.

[0100] When the output voltage VCC1 of the DAC output module is positive, the voltage value output to the potential point VCC6 by the integral operational amplifier module IC1 is positive;

[0101] When the output voltage VCC1 of the DAC output module is negative, the voltage value output to the potential point VCC6 by the integral operational amplifier module IC1 is negative;

[0102] Assume that the base current of transistor Q2 in the first driving circuit is Ib1, the emitter current of transistor Q2 is Ie1, and the collector current of transistor Q2 is Ic1; the base current of transistor Q3 is Ib2, the emitter current is Ie2, and the collector current is Ic2; the base current of transistor Q4 in the second driving circuit is Ib3, the emitter current of transistor Q4 is Ie3, and the collector current of transistor Q4 is Ic3; the base current of transistor Q6 is Ib4, the emitter current of transistor Q6 is Ie4, and the collector current of transistor Q6 is Ic4; the first floating adjustment circuit is MOS transistor Q1, the drain D of MOS transistor Q1 → the source S of MOS transistor Q1 The current between the MOS transistor Q7 and the drain D of the MOS transistor Q7 in the second suspension adjustment circuit is Ids1, the voltage between the base G of the MOS transistor Q1 and the source S of the MOS transistor Q1 is Vgs1, the on-resistance between the drain D of the MOS transistor Q1 and the source S of the MOS transistor Q1 is Rds1, and the voltage between the drain D of the MOS transistor Q1 and the source S of the MOS transistor Q1 is Vds1; the current between the source S of the MOS transistor Q7 and the drain D of the MOS transistor Q7 in the second suspension adjustment circuit is Isd2, the voltage between the base G of the MOS transistor Q7 and the source S of the MOS transistor Q7 is Vgs2, the on-resistance between the drain D of the MOS transistor Q7 and the source S of the MOS transistor Q7 is Rsd2, and the voltage between the drain D of the MOS transistor Q7 and the source S of the MOS transistor Q7 is Vsd2;

[0103] When Vout>VCC, the control module automatically sets the voltage of the DAC output module output value VCC1 to a positive voltage value according to the absolute value of |Vout-VCC|. The floating voltage regulation process is as follows:

[0104] Positive voltage at potential point VCC1 → positive voltage at potential point VCC3 → positive voltage at potential point VCC4 → positive voltage at potential point VCC6 → Ib1↑ → Ie1↑ → Ie2↓ → Ib2↓ → Ic2↓ → VCC9↑ → Vgs1↑ of MOS tube Q1 → Ids1↑ of MOS tube Q1 → on-resistance of MOS tube Q1↓ → drain-source Vds↓ of MOS tube Q1;

[0105] Positive voltage at potential point VCC1 → positive voltage at potential point VCC3 → positive voltage at potential point VCC4 → positive voltage at potential point VCC6 → Ib3↓ → Ie3↓ → Ie4↑ → Ib4↑ → Ic4↑ → VCC15↑ → Vgs1↑ of MOS tube Q7 → Ids1↑ of MOS tube Q7 → on-resistance of MOS tube Q7↑ → drain-source Vds↑ of MOS tube Q7;

[0106] As described above, the drain-source Vds↓ of MOS transistor Q1 and the source Vds↑ of MOS transistor Q7 work together to move the reference point toward point A. Therefore, the voltage at point B decreases relative to the reference point, and the output voltage Vout decreases during the adjustment process.

[0107] When Vout is less than VCC, the control module automatically sets the DAC output module output voltage VCC1 to a negative voltage value according to the absolute value of |Vout-VCC|. The floating voltage regulation process is as follows:

[0108] VCC1 negative voltage → VCC3 negative voltage → VCC4 negative voltage → VCC6 negative voltage → Ib1↓ → Ie1↓ → Ie2↑ → Ib2↑ → Ic2↑ → VCC9↓ → Vgs1 of MOS tube Q1↓ → Ids1 of MOS tube Q1↓ → on-resistance of MOS tube Q1↑ → drain-source Vds of MOS tube Q1↑;

[0109] VCC1 negative voltage → VCC3 negative voltage → VCC4 negative voltage → VCC6 negative voltage → Ib3↑ → Ie3↑ → Ie4↓ → Ib4↓ → Ic4↓ → VCC15↓ → Vgs1 of MOS tube Q7↓ → Ids1 of MOS tube Q7↓ → on-resistance of MOS tube Q7↓ → drain-source Vds of MOS tube Q7↓;

[0110] As described above, the drain-source Vds↑ of MOS transistor Q1 and the drain-source Vds↓ of MOS transistor Q3 work together to move the suspension point toward point C. Therefore, the voltage at point B relative to the suspension point increases, and the output Vout increases.

[0111] When Vout=VCC, the control module automatically sets the output voltage VCC1 of the DAC output module to the parameter value (initial value) output by the floating voltage regulation circuit zero calibration DAC output module, stops the voltage regulation process, and maintains the current output constant voltage value;

[0112] Start the voltage output program, turn on the bidirectional current limiting switch circuit, and supply power to the load.

[0113] Reference Figure 8 The embodiment of the present invention further provides a method for regulating a suspended voltage regulating circuit. The method comprises the following steps:

[0114] S101. The power supply module provides an output voltage to the load, and keeps the potential of the positive terminal of the output voltage unchanged;

[0115] S102. The output voltage is collected by the voltage acquisition module, and the acquisition result is fed back to the control module;

[0116] S103. The control module controls the DAC output module to output the regulated voltage according to the acquisition results;

[0117] S104. The suspension adjustment module adjusts the potential of the negative terminal of the output voltage according to the adjustment voltage, so as to adjust the output voltage to the operating voltage required by the load.

[0118] Specifically, when the floating voltage regulation circuit executes step S101, the shutdown circuit is turned on by default and the current limiting switch module is turned off. At this time, there is no output voltage to prevent abnormal conditions in the voltage regulation process from burning the circuit and load;

[0119] When the suspension voltage regulation circuit executes step S102, the control module sends the DAC output module parameter value (initial value) of the suspension adjustment module zero calibration to the DAC output module by default through the communication interface 1 and outputs the corresponding voltage value, and sets the current limiting parameter and output voltage VCC of the current limiting switch module (VCC is the user-set voltage), and the shutdown module is turned off;

[0120] When the floating voltage regulation circuit executes step S103, the control module performs a comprehensive calculation and judgment on the output voltage Vout data value based on the collected results, and controls the DAC output module to output the regulated voltage: if Vout>VCC, the control module automatically sets the output voltage of the DAC output module to a positive value based on the absolute value of |Vout-VCC| (the larger the absolute value, the faster the adjustment speed); if Vout<VCC, the control module automatically sets the output voltage of the DAC output module to a negative value based on the absolute value of |Vout-VCC| (the larger the absolute value, the faster the adjustment speed); when Vout=VCC, the floating adjustment process stops, the voltage output program is started, the current limiting switch module is turned on, and the power supply module starts to supply power to the load.

[0121] Reference Figure 9 Before the step of providing an output voltage to a load and maintaining the potential of the positive terminal of the output voltage constant, the power supply module of the embodiment of the present invention further includes a zero calibration process, which includes but is not limited to the following steps:

[0122] S201. The DAC output module outputs a 0V voltage to the suspension adjustment module;

[0123] S202. The output voltage at this time is collected by the voltage acquisition module;

[0124] S203. The control module adjusts the regulated voltage output by the DAC output module based on the comparison result of the output voltage with the first threshold and the second threshold, so that the suspension adjustment module adjusts the output voltage to between the first threshold and the second threshold; wherein the first threshold is greater than the second threshold;

[0125] S204. When the output voltage is greater than the first threshold, the control module controls the DAC output module to output a positive voltage, causing the potential point of the suspension adjustment module to move upward; when the output voltage of the suspension voltage adjustment module is less than the second threshold, the control module controls the DAC output module to output a negative voltage, causing the potential point of the suspension adjustment module to move downward; and the above process is repeated until the output negative voltage stabilizes between the first threshold and the second threshold.

[0126] S205. The control module adjusts the regulated voltage output by the DAC output module in units of minimum resolution based on whether the output voltage is within a straight line range, so that the suspension adjustment module adjusts the output voltage to approximately a straight line level, and saves the regulated voltage at this time as the initial output value of the DAC output module;

[0127] S206. When the output voltage gradually increases, the control module controls the DAC output module to output a positive voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually increases; when the output voltage gradually decreases, the control module controls the DAC output module to output a negative voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually decreases; repeat the above process until the output voltage stabilizes within the straight line range, and save the voltage value output by the voltage module at this time as the initial output value of the DAC output module.

[0128] Specifically, when the zero calibration process executes step S201, the shutdown module is turned on by default, and the bidirectional switch module is turned off. At this time, there is no output voltage, which prevents the suspension adjustment module from having an abnormality during the zero calibration process and causing the circuit and load to burn out; when executing steps S203 to S205, the first threshold value can be but not limited to 1V, and the second threshold value can be but not limited to a voltage value at -1V. Furthermore, if Vout>1V, the control module controls the output voltage of the DAC output module to be automatically set to a positive value according to the absolute value of |Vout-VCC| (the larger the DAC absolute value, the faster the adjustment speed); if Vout<-1V, the control module controls the output voltage of the DAC output module to be automatically set to a negative value according to the absolute value of |Vout-VCC| (the larger the DAC absolute value, the faster the adjustment speed); when the Vout voltage value is within the range of -1V to +1V, the control module controls the DAC output module to output a zero volt voltage and stops the voltage regulation process;

[0129] The voltage acquisition module collects the Vout value in real time, and the control module calculates it in real time. Value: If The DAC output module outputs a positive voltage value with the minimum resolution and gradually increases the output at the set time interval; when (ie Vout is approximately a horizontal straight line), the control module records the output parameter value (initial value) of the suspension adjustment module zero calibration DAC output module and saves it; if The DAC output module outputs a negative voltage with the minimum resolution and gradually attenuates the output at the set time interval; when (i.e. Vout is approximately a horizontal straight line), the control module records and saves the output parameter value (initial value) of the suspension adjustment module zero calibration DAC output module

[0130] Throughout this specification, references to terms such as "one embodiment," "further embodiments," "some specific embodiments," or "some examples" indicate that the specific features, structures, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0131] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A suspended voltage regulating circuit, characterized in that: include: A power supply module, configured to provide an output voltage to a load, wherein the potential of the positive terminal of the output voltage remains unchanged; a suspension adjustment module, comprising a first suspension adjustment circuit, a second suspension adjustment circuit, and a voltage regulation feedback circuit, wherein the first suspension adjustment circuit is used to increase the potential of the negative terminal of the output voltage, and the second suspension adjustment circuit is used to reduce the potential of the negative terminal of the output voltage; A DAC output module, configured to output a regulating voltage to control the adjustment process of the suspension adjustment module; A voltage acquisition module, configured to acquire the output voltage; a control module, configured to adjust the regulated voltage output by the DAC output module according to the output voltage collected by the voltage collection module, so that the suspension adjustment module adjusts the output voltage to the operating voltage required by the load; The first suspension adjustment circuit includes a resistor R3, a diode D2, a MOS transistor Q1, and a resistor R10; one end of the resistor R3 and the cathode of the diode D2 are both connected to the gate G of the first pin of the MOS transistor Q1, the anode of the diode D2 is grounded, and the other end of the resistor R3 is connected to the first drive circuit; the drain D of the second pin of the MOS transistor Q1 is connected to the power supply module, the source S of the third pin of the MOS transistor is connected to one end of the resistor R10, and the other end of the resistor R10 is grounded; The second suspension adjustment circuit includes a diode D6, a MOS transistor Q7, a resistor R16, and a resistor R27. The anode of the diode D6 is connected to the gate G of the first pin of the MOS transistor Q7, and the cathode of the diode D6 is grounded. The drain D of the second pin of the MOS transistor Q7 is connected to the power supply module. One end of the resistor R16 and one end of the resistor R19 are both connected to the source S of the third pin of the MOS transistor Q3. The other end of the resistor R16 is grounded, and the other end of the resistor R27 is connected to the second drive circuit. The voltage regulation feedback circuit includes a capacitor C5 and a resistor R24. One end of the capacitor C5 is connected to the suspension adjustment module, the other end of the capacitor C5 is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to the proportional amplification module. The voltage regulation feedback circuit is used to feed back the output voltage value of the suspension adjustment module.

2. The floating voltage regulating circuit according to claim 1, characterized in that: A current limiting switch module is further provided between the output voltage and the load. The current limiting switch module is also electrically connected to the control module. The control module can control the current limiting switch module to limit the current of the output voltage.

3. The floating voltage regulating circuit according to claim 1, characterized in that: An amplification module is further connected between the DAC output module and the suspension adjustment module. The amplification module includes a proportional amplification circuit and an integral operational amplifier circuit electrically connected in sequence. The proportional amplification circuit is used to amplify the adjustment voltage output by the DAC output module, and the integral operational amplifier circuit is used to control the adjustment process of the suspension adjustment module according to the voltage output by the proportional amplification circuit.

4. The floating voltage regulating circuit according to claim 3, characterized in that: A driving module is further connected between the amplification module and the suspension adjustment module. The driving module includes a first driving circuit and a second driving circuit. The first driving circuit is used to drive and adjust the first suspension adjustment circuit, and the second driving circuit is used to drive and adjust the second suspension adjustment circuit.

5. The floating voltage regulating circuit according to claim 3, characterized in that: A shutdown module is also connected between the amplification module and the suspension adjustment module. The shutdown module is electrically connected to the control module. The shutdown module includes a first shutdown circuit and a second shutdown circuit. The first shutdown circuit is used to shut down the first suspension adjustment circuit when the first suspension adjustment circuit is abnormal. The second shutdown circuit is used to shut down the second suspension adjustment circuit when the second suspension adjustment circuit is abnormal.

6. The floating voltage regulating circuit according to claim 3, characterized in that: The floating voltage regulation circuit further includes a voltage regulation feedback circuit, and the voltage regulation feedback circuit is used to send the output voltage to the amplification module.

7. The floating voltage regulating circuit according to claim 1, characterized in that: The power supply module includes an input power supply, a transformer circuit, a fuse circuit and a rectifier circuit electrically connected in sequence. The transformer circuit is used to transform the input power supply, and the fuse circuit is used to prevent abnormal burning of the circuit and improve the safety of the circuit; the rectifier circuit is used to rectify and filter the input power supply after transformation to obtain a DC voltage.

8. A voltage regulation method for a suspended voltage regulation circuit, characterized in that: The method comprises: The power supply module provides an output voltage to the load and keeps the potential of the positive terminal of the output voltage constant; The output voltage is collected by a voltage collection module, and the collection result is fed back to the control module; The control module controls the DAC output module to output a regulated voltage according to the acquisition result; The suspension adjustment module adjusts the potential of the negative terminal of the output voltage according to the adjustment voltage, so as to adjust the output voltage to the working voltage required by the load; The suspension adjustment module includes a first suspension adjustment circuit, a second suspension adjustment circuit, and a voltage regulation feedback circuit, wherein the first suspension adjustment circuit is used to increase the potential of the negative terminal of the output voltage, and the second suspension adjustment circuit is used to reduce the potential of the negative terminal of the output voltage; The first suspension adjustment circuit includes a resistor R3, a diode D2, a MOS transistor Q1, and a resistor R10; one end of the resistor R3 and the cathode of the diode D2 are both connected to the gate G of the first pin of the MOS transistor Q1, the anode of the diode D2 is grounded, and the other end of the resistor R3 is connected to the first drive circuit; the drain D of the second pin of the MOS transistor Q1 is connected to the power supply module, the source S of the third pin of the MOS transistor is connected to one end of the resistor R10, and the other end of the resistor R10 is grounded; The second suspension adjustment circuit includes a diode D6, a MOS transistor Q7, a resistor R16, and a resistor R27. The anode of the diode D6 is connected to the gate G of the first pin of the MOS transistor Q7, and the cathode of the diode D6 is grounded. The drain D of the second pin of the MOS transistor Q7 is connected to the power supply module. One end of the resistor R16 and one end of the resistor R19 are both connected to the source S of the third pin of the MOS transistor Q3. The other end of the resistor R16 is grounded, and the other end of the resistor R27 is connected to the second drive circuit. The voltage regulation feedback circuit includes a capacitor C5 and a resistor R24. One end of the capacitor C5 is connected to the suspension adjustment module, the other end of the capacitor C5 is connected to one end of the resistor R24, and the other end of the resistor R24 is connected to the proportional amplification module. The voltage regulation feedback circuit is used to feed back the output voltage value of the suspension adjustment module.

9. The voltage regulation method of the floating voltage regulation circuit according to claim 8, characterized in that: Before the step of the power supply module providing an output voltage to the load and keeping the potential of the positive terminal of the output voltage unchanged, a zero calibration process is also included. The zero calibration process includes the following steps: The DAC output module outputs a voltage of 0V to the suspension adjustment module; Collecting the output voltage at this time by the voltage collection module; The control module adjusts the regulated voltage output by the DAC output module based on a comparison result of the output voltage with a first threshold and a second threshold, so that the suspension adjustment module adjusts the output voltage to between the first threshold and the second threshold; wherein the first threshold is greater than the second threshold; The control module adjusts the regulated voltage output by the DAC output module in units of minimum resolution according to whether the output voltage is within a straight line range, so that the suspension adjustment module adjusts the output voltage to approximately a straight line level, and saves the regulated voltage at this time as the initial output value of the DAC output module.

10. The voltage regulation method of the floating voltage regulation circuit according to claim 9, characterized in that: The control module adjusts the regulated voltage output by the DAC output module according to a comparison result of the output voltage with the first threshold and the second threshold, so that the suspension adjustment module adjusts the output voltage to between the first threshold and the second threshold, specifically including: When the output voltage is greater than the first threshold, the control module controls the DAC output module to output a positive voltage, so that the potential of the negative end of the output voltage increases; when the output voltage is less than the second threshold, the control module controls the DAC output module to output a negative voltage, so that the potential of the negative end of the output voltage decreases; repeating the above process until the output voltage stabilizes between the first threshold and the second threshold; The control module adjusts the regulated voltage output by the DAC output module in a minimum resolution unit according to whether the output voltage is within a straight line range, so that the suspension adjustment module adjusts the output voltage to approximately a straight line level, and saves the regulated voltage at this time as the initial output value of the DAC output module, specifically including: When the output voltage gradually increases, the control module controls the DAC output module to output a positive voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually increases; when the output voltage gradually decreases, the control module controls the DAC output module to output a negative voltage in units of minimum resolution, so that the potential of the negative end of the output voltage gradually decreases; the above process is repeated until the output voltage stabilizes within the straight line range, and the voltage value output by the voltage module at this time is saved as the initial output value of the DAC output module.

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