A synchronous rectification power supply method and circuit capable of feeding back energy to output

Abstract

The application discloses a synchronous rectification power supply method and circuit capable of feeding back energy to output, relates to the technical field of rectification circuits, and comprises the following steps: acquiring real-time operation data of a synchronous rectification power supply circuit; calculating the total amount of feedback energy of the circuit at each moment according to the real-time operation data; calculating an energy real-time feedback coefficient according to the total amount of feedback energy and the real-time operation condition of the synchronous rectification power supply circuit; calculating the theoretical duration of energy feedback output according to the energy real-time feedback coefficient, the total amount of feedback energy and the energy consumption rate in a historical time period; determining the performable index of energy transmission to the load end and the feedback opportunity corresponding to the performable index based on the circuit data variation amount in the historical operation process of the load end; and performing energy feedback to the load end based on the performable index and the theoretical duration. The application achieves the technical effect of improving the feedback energy utilization rate in the circuit.

Description

Technical Field

[0001] This invention relates to the field of rectifier circuit technology, specifically to a synchronous rectified power supply method and circuit in which energy can be fed back to the output. Background Technology

[0002] During equipment operation, the load side of the circuit system will inevitably generate reverse energy (load feedback energy), which is a current whose direction is opposite to the rectified output direction. Ordinary circuits can only passively consume this energy through components, which will result in energy waste and damage to the components.

[0003] Currently, this problem is solved by using a synchronous rectification circuit. In existing methods, this is mainly achieved by setting a voltage threshold. That is, when the supply voltage of the synchronous rectification chip exceeds the voltage regulation value of the Zener diode, the conducting circuit allows the excess load feedback energy to be fed back to the output. However, the energy feedback with a fixed threshold still leads to energy retention or excessive consumption, resulting in low energy utilization efficiency and a significant impact on the stability of the circuit load, which can easily lead to significant fluctuations in current and voltage. Summary of the Invention

[0004] In order to solve the technical problem in related technologies that the excess load feedback energy is fed back to the output terminal by setting a voltage threshold, resulting in low energy utilization efficiency, this invention provides a synchronous rectification power supply method and circuit in which energy can be fed back to the output.

[0005] The specific technical solution adopted is as follows:

[0006] Obtain real-time operating data of the synchronous rectifier power supply circuit;

[0007] Based on the real-time operating data of the energy storage module and the first diode during conduction, the total amount of regenerative energy of the synchronous rectifier power supply circuit at each moment is calculated.

[0008] The real-time energy feedback coefficient is calculated based on the total amount of regenerative energy and the real-time operating conditions of the synchronous rectifier power supply circuit.

[0009] The theoretical duration of energy feedback output is calculated based on the real-time energy feedback coefficient, the total amount of feedback energy, and the energy consumption rate over a historical period.

[0010] Based on the changes in circuit data during the historical operation of the load, the feasible index for transmitting energy to the load and the corresponding feedback timing are determined.

[0011] Energy feedback is performed on the load side based on the feasible index and theoretical duration.

[0012] In one possible implementation of this application, based on the real-time operating data corresponding to the energy storage module and the conduction process of the first diode, the total amount of regenerative energy of the synchronous rectification power supply circuit at each moment is calculated, including:

[0013] Based on the real-time operating data in the energy storage module, the real-time redundant feedback output energy is calculated.

[0014] Based on the regenerative output energy and the real-time operating data corresponding to the conduction process of the first diode, the total regenerative energy of the synchronous rectifier power supply circuit at each moment is calculated.

[0015] In one possible implementation of this application, real-time redundant feedback output energy is calculated based on real-time operating data in the energy storage module, including:

[0016] For any given moment, the difference between the capacitor voltage value and the discharge valley value in the energy storage module at the current moment is taken as the total voltage fluctuation amplitude of the capacitor at the current moment.

[0017] Based on the total voltage fluctuation amplitude and the corresponding capacitance value, the total stored energy of the capacitor at the current moment can be calculated.

[0018] Obtain the sustaining voltage required for circuit operation, and calculate the required energy in the capacitor based on the capacitor value, sustaining voltage, and the minimum voltage at each moment in the real-time operating data;

[0019] Based on the difference between total stored energy and demanded energy, the real-time redundant feedback output energy is calculated.

[0020] In one possible implementation of this application, based on the regenerative output energy and the real-time operating data corresponding to the conduction process of the first diode, the total regenerative energy of the synchronous rectification power supply circuit at each moment is calculated, including:

[0021] Based on the current value and load voltage value at each moment in the real-time operating data during the conduction process of the first diode, the energy collected in the feedback path where the first diode is located at each moment is determined.

[0022] Based on the on and off times of the feedback path, the collected energy is calculated by integration to obtain the total collected energy of the feedback path.

[0023] Based on the regenerative output energy and the total collected energy, the total regenerative energy of the synchronous rectifier power supply circuit at each time point is calculated.

[0024] In one possible implementation of this application, the real-time energy feedback coefficient is calculated based on the total amount of regenerative energy and the real-time operating conditions of the synchronous rectifier power supply circuit, including:

[0025] Based on the voltage and current data of the input terminal and load terminal of the synchronous rectifier power supply circuit within a preset time period, the voltage fluctuation and current fluctuation at each moment are calculated.

[0026] Based on the degree of voltage fluctuation and current fluctuation, the stability of the overall circuit of the synchronous rectification power supply circuit at each time point is calculated.

[0027] Based on the average temperature of the capacitors in the switching nodes and energy storage modules and the total amount of regenerative energy, the energy storage pressure coefficient of the overall circuit is calculated.

[0028] Based on the stability level and energy storage pressure coefficient, the real-time energy feedback coefficient is calculated.

[0029] In one possible implementation of this application, the theoretical duration of energy feedback output is calculated based on the real-time energy feedback coefficient, the total amount of feedbackable energy, and the energy consumption rate over a historical time period, including:

[0030] Based on the difference in the total amount of recoverable energy at each adjacent time within any energy feedback interval, the accumulation rate of recoverable energy under the current circuit is calculated.

[0031] Obtain the energy consumption rate of the output terminal within a historical time period, and calculate the average energy consumption rate.

[0032] The theoretical duration of energy feedback output is calculated based on the average consumption rate, accumulation speed, total amount of energy that can be fed back, and real-time energy feedback coefficient.

[0033] In one possible implementation of this application, based on the changes in circuit data during the historical operation of the load, the feasibility index for transmitting energy to the load and the corresponding feedback timing are determined, including:

[0034] Acquire historical operational change data during the operation of the load, including current change data and voltage change data;

[0035] The minimum feedback energy is calculated based on the product of current change data and voltage change data.

[0036] Based on the minimum feedback energy, the total amount of feedback energy, and the real-time energy feedback coefficient, the energy feedback feasibility index at each time point is calculated.

[0037] When the actionable index exceeds the preset index threshold, the time corresponding to the actionable index will be used as the feedback opportunity.

[0038] In one possible implementation of this application, energy feedback is performed on the load side based on the feasible index and the theoretical duration, including:

[0039] If the exponential is greater than the preset threshold and the duration of energy feedback is less than or equal to the theoretical duration, then energy feedback to the load will continue.

[0040] If the exponential is less than or equal to the preset threshold and the duration of energy feedback is greater than the theoretical duration, then energy feedback to the load side will be stopped.

[0041] In one possible implementation of this application, after providing energy feedback to the load based on the feasible index and theoretical duration, the method further includes:

[0042] The real-time operating status of the overall circuit, including the synchronous rectifier power supply circuit, is analyzed. If the analysis results indicate that the circuit is operating abnormally, the operation of the overall circuit is stopped and a circuit warning is reported.

[0043] This application also provides a synchronous rectified power supply circuit in which energy can be fed back to the output, including:

[0044] The system includes a synchronous rectifier chip, an energy storage module, and a first diode. The energy storage module includes a first capacitor and a second capacitor. The synchronous rectifier chip is electrically connected to the first capacitor, the second capacitor, and the first diode. The energy storage module is used to provide the regenerative output energy from the total regenerative energy transmitted to the load. The first diode is used to transmit the total regenerative energy to the load.

[0045] The present invention has, but is not limited to, the following technical effects:

[0046] By acquiring real-time operating data from the synchronous rectifier power supply circuit, and based on the real-time operating data corresponding to the energy storage module and the first diode during conduction, the total amount of regenerative energy of the synchronous rectifier power supply circuit at each moment is calculated. Then, based on the real-time operating conditions of the synchronous rectifier power supply circuit, the energy feedback coefficient is calculated. Furthermore, based on the real-time energy feedback coefficient, the total amount of regenerative energy, and the energy consumption rate over a historical period, the theoretical duration of energy feedback output is calculated. Based on the changes in circuit data during the historical operation of the synchronous rectifier power supply circuit, the timing for energy feedback to the load is determined. Based on the feedback timing and the theoretical duration, energy feedback is performed to the load. Thus, the total amount of regenerative energy in the energy storage module and feedback path is accurately calculated. Combined with the real-time operating conditions of the circuit, the feedback coefficient and feedback timing are dynamically adjusted to reduce waste, improve energy utilization, and consequently reduce significant fluctuations in current and voltage. Attached Figure Description

[0047] Figure 1 This is a flowchart illustrating the first embodiment of the synchronous rectification power supply method for which energy can be fed back to the output according to this application.

[0048] Figure 2 This is a schematic diagram of the synchronous rectification power supply circuit involved in the synchronous rectification power supply method for energy feedback to the output in this application;

[0049] Figure 3 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application. Detailed Implementation

[0050] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0051] This application provides a synchronous rectification power supply method with energy feedback to the output. In the first embodiment of the synchronous rectification power supply method with energy feedback to the output of this application, refer to... Figure 1 The method is applied to a synchronous rectification power supply circuit, which includes an energy storage module and a first diode, and is electrically connected to the load terminal, including:

[0052] Step S10: Obtain real-time operating data of the synchronous rectifier power supply circuit;

[0053] Step S20: Based on the real-time operating data of the energy storage module and the first diode during conduction, calculate the total amount of regenerative energy of the synchronous rectification power supply circuit at each moment.

[0054] Step S30: Calculate the real-time energy feedback coefficient based on the total amount of feedback energy and the real-time operating conditions of the synchronous rectifier power supply circuit.

[0055] Step S40: Calculate the theoretical duration of energy feedback output based on the real-time energy feedback coefficient, the total amount of feedback energy, and the energy consumption rate over a historical period.

[0056] Step S50: Based on the changes in circuit data during the historical operation of the load, determine the feasible index for transmitting energy to the load and the corresponding feedback timing.

[0057] Step S60: Based on the feasible index and theoretical duration, energy feedback is performed on the load side.

[0058] This embodiment aims to: accurately calculate the total amount of regenerative energy in the energy storage module and feedback path, dynamically adjust the feedback coefficient and feedback timing based on the real-time operating conditions of the circuit, reduce waste, improve energy utilization, and thereby reduce significant fluctuations in current and voltage.

[0059] Step S10: Obtain real-time operating data of the synchronous rectifier power supply circuit.

[0060] As an example, the synchronous rectification power supply method with energy feedback to the output can be applied to a synchronous rectification power supply device with energy feedback to the output. The synchronous rectification power supply device with energy feedback to the output belongs to the synchronous rectification power supply system with energy feedback to the output, and the synchronous rectification power supply system with energy feedback to the output belongs to the synchronous rectification power supply equipment with energy feedback to the output.

[0061] As an example, the synchronous rectification power supply method, in which energy can be fed back to the output, can also be applied to synchronous rectification power supply circuits, such as... Figure 2 As shown, the circuit within the dashed box is the synchronous rectification power supply circuit. The overall current flow is: input terminal → pre-stage circuit → synchronous rectification power supply circuit → post-stage circuit → output terminal. The post-stage circuit is the load terminal. Crg1 and Crg2 represent the first and second capacitors used to store regenerative energy. ZD1 is the first diode (Zenyl Zener diode). When this diode is conducting, it can be used to transfer regenerative energy to the load terminal. During the energy feedback output process, the ZD1 path is the only outlet for regenerative energy, forming a feedback path of capacitor positive terminal - ZD1 path - output terminal positive terminal - output terminal negative terminal - capacitor negative terminal.

[0062] As an example, various types of sensors are installed in this circuit to determine the regenerative energy in the circuit and to acquire real-time operating data of the synchronous rectifier power supply circuit. This allows for analysis of the circuit's real-time operating conditions. The specific sensor types installed are as follows:

[0063] Voltage sensor:

[0064] Precision voltage sensors: installed at both ends of regulating capacitors Crg1 and Crg2 respectively, used to obtain the charging status of the capacitors in real time;

[0065] Output voltage sensor: Installed at both ends of the power output terminal, used to monitor the load voltage in real time;

[0066] Input voltage sensor: Installed at both ends of the bus Vin, used to obtain the load condition of the circuit.

[0067] Current sensor:

[0068] High-frequency current sensor: mounted on Zener diode ZD1, used to monitor the magnitude of feedback current in real time;

[0069] Input current sensor: connected in series with the output terminal to obtain the load condition of the circuit;

[0070] Reverse current sensor: Installed in the source-drain circuit of synchronous rectifier diode SR, it is used to monitor reverse current. When the reverse current is too large, the feedback is paused and SR is turned off first to avoid additional losses.

[0071] Temperature sensors: installed near Crg2 and ZD1 respectively, for real-time monitoring of device temperature.

[0072] As an example, real-time operating data can be voltage data, current data, internal temperature data, etc. at various times, and the data acquisition frequency can be 20Hz, without any specific limitation.

[0073] Step S20: Based on the real-time operating data of the energy storage module and the first diode during conduction, calculate the total amount of regenerative energy of the synchronous rectifier power supply circuit at each moment.

[0074] As an example, the energy storage module includes a first capacitor and a second capacitor for storing energy that can be fed back to the output. During the conduction of the first diode, it acts as an outlet for energy transmission and also collects a certain amount of energy. By analyzing the real-time operating data of these two parts, the total amount of feedable energy of the synchronous rectifier power supply circuit at each moment can be calculated. The total amount of feedable energy mainly consists of two parts: the energy stored in the energy storage module and the energy collected by the first diode.

[0075] The step S20, in which energy can be fed back to the output synchronous rectified power supply, further includes steps S21 to S22, including:

[0076] Step S21: Based on the real-time operating data in the energy storage module, calculate the real-time redundant feedback output energy.

[0077] As an example, in the overall circuit where the synchronous rectification power supply circuit is located, the energy that can be fed back to the output terminal mainly comes from the energy storage elements (capacitors Crg1 and Crg2) in the energy storage module of the circuit and the energy that has been recovered to the feedback path (actual feedback energy of the ZD1 path). First, the real-time redundant feedable output energy is calculated from the real-time operating data in the energy storage module. The feedable output energy is used to represent the energy stored in the capacitor.

[0078] Step S21 includes:

[0079] For any given moment, the difference between the capacitor voltage value and the discharge valley value in the energy storage module at the current moment is taken as the total voltage fluctuation amplitude of the capacitor at the current moment.

[0080] Based on the total voltage fluctuation amplitude and the corresponding capacitance value, the total stored energy of the capacitor at the current moment can be calculated.

[0081] As an example, taking the distance at time t as an example, the distance up to the t-th time will be used to calculate the distance up to the t-th time. The difference between the voltage value of each capacitor in the energy storage module and the discharge valley value is denoted as the value up to the [number]. The moment Total voltage fluctuation amplitude of each capacitor Among them, when the deadline is the The moment Total voltage fluctuation amplitude of each capacitor The larger the value, the more energy the capacitor stores. Both the capacitor voltage value and the discharge trough value are part of the real-time operating data.

[0082] As an example, in conjunction with the first The capacitance value of each capacitor (Determined based on the capacitor's factory specifications), calculations up to the [number]th [number]th [year]. Total energy stored in the capacitor at any given time ;

[0083]

[0084] in, This represents the total voltage fluctuation amplitude. Similarly, the total energy stored in the capacitor at other times can also be calculated.

[0085] Obtain the sustaining voltage required for circuit operation, and calculate the required energy in the capacitor based on the capacitor value, sustaining voltage, and the minimum voltage at each moment in the real-time operating data;

[0086] Based on the difference between total stored energy and demanded energy, the real-time redundant feedback output energy is calculated.

[0087] As an example, during circuit operation, capacitors also need to maintain the operation of some chip components in the overall circuit. The required sustaining voltage for the capacitor during circuit operation can be obtained through real-time operating data. The minimum voltage can be obtained from the real-time operating data. Taking the i-th capacitor at time t as an example, the energy required by the capacitor... The calculation method can be:

[0088]

[0089] in, Indicates the first The operating voltage of a chip or component maintained by a capacitor, also known as the sustaining voltage. This is the capacitance value. Let be the minimum voltage of the i-th capacitor up to time t.

[0090] As an example, the calculation up to the [number]th Time of the first Total energy stored in each capacitor With the The energy required by a capacitor The difference, i.e., the first Real-time redundant regenerative output energy in each capacitor Among them, only when the total stored energy Energy greater than required At that time, there is real-time redundancy that can be fed back as output energy. Conversely, real-time redundancy allows for feedback of output energy. .

[0091]

[0092] Repeat the above steps to calculate the real-time redundant feedback output energy for the other capacitors in the synchronous rectifier power supply circuit, and sum them to obtain the real-time redundant feedback output energy of the capacitors.

[0093] Step S22: Based on the regenerative output energy and the real-time operating data corresponding to the conduction process of the first diode, calculate the total regenerative energy of the synchronous rectification power supply circuit at each moment.

[0094] As an example, during the energy feedback output process, the ZD1 path is the only outlet for the feedback energy, forming a feedback path of capacitor positive terminal - ZD1 path - output positive terminal - output negative terminal - capacitor negative terminal. When the ZD1 path is disconnected, the collected feedback energy will still remain. This part of the energy will be fed back to the output terminal during the next conduction process. Based on this, according to the real-time operating data corresponding to the conduction process of the first diode, the collected energy in the feedback path where the first diode is located is calculated, and the total amount of feedback energy of the synchronous rectification power supply circuit at each moment is determined according to the sum of the collected energy and the feedback output energy.

[0095] Step S22 includes:

[0096] Based on the current value and load voltage value at each moment in the real-time operating data during the conduction process of the first diode, the energy collected in the feedback path where the first diode is located at each moment is determined.

[0097] Based on the on and off times of the feedback path, the collected energy is calculated by integration to obtain the total collected energy of the feedback path.

[0098] As an example, taking time t as an example, based on the current value and load voltage value at any time during the previous conduction of the first diode, the value of the first diode is determined. Energy collection in the current feedback pathway ;

[0099]

[0100] in, This represents the current flowing through the first diode at any point during the previous conduction process up to time t. To represent the load voltage value at any time during the previous conduction process up to time t, we can then obtain the energy collected in the feedback path at any time during conduction. and for discrete data By performing integral calculations, the total amount of energy collected in the feedback pathway can be obtained. That is, the total amount of energy collected.

[0101] As an example, the total amount of energy collected The calculation method can be:

[0102]

[0103] in, This indicates the on-time of the feedback path containing ZD1; This indicates the moment when the feedback path containing ZD1 is disconnected. Indicates the first Collect energy in the feedback pathway at all times.

[0104] Based on the regenerative output energy and the total collected energy, the total regenerative energy of the synchronous rectifier power supply circuit at each time point is calculated.

[0105] As an example, the regenerative output energy can be combined with real-time capacitor redundancy. and the total amount of energy collected in the feedback pathway Determine the first Total amount of regenerative energy in the circuit system at this moment .

[0106]

[0107] Step S30: Calculate the real-time energy feedback coefficient based on the total amount of feedback energy and the real-time operating conditions of the synchronous rectifier power supply circuit.

[0108] As an example, when a synchronous rectifier power supply circuit provides energy feedback to the output of the overall circuit, the real-time operating conditions of the circuit system have a significant impact on the energy feedback. When the circuit system is in a stable operating condition, the controller can smoothly switch the operating mode from "buck" to "boost feedback" mode and precisely adjust the amplitude of the feedback current to keep the output voltage stable. When the circuit system is in an unstable operating condition, the current and voltage of the circuit itself are in an oscillating state. At this time, the larger the amount of energy feedback, the greater the amplitude of the oscillation will be, which will not only fail to effectively feed back energy, but will also cause certain damage to the components.

[0109] In summary, before implementing energy feedback, it is necessary to first analyze the real-time operating conditions of the circuit system and determine the real-time energy feedback coefficient based on the overall stability of the circuit operating conditions and the total amount of energy that can be fed back. The real-time energy feedback coefficient is used to control the amount of energy that can be fed back and is applied as an energy adjustment coefficient.

[0110] Step S30 includes:

[0111] Based on the voltage and current data at the input and load terminals of the synchronous rectifier power supply circuit within a preset time period, the voltage and current fluctuation levels at each moment are calculated.

[0112] Based on the degree of voltage and current fluctuations, the stability of the overall circuit at each moment of the synchronous rectifier power supply circuit is calculated.

[0113] As an example, based on the voltage and current data at the circuit input and load terminals, calculate the first... The degree of fluctuation of voltage and current data at any given time The voltage fluctuation level and the current fluctuation level were calculated respectively.

[0114] As an example, the preset time period can be 1 minute, 2 minutes, etc., and there is no specific limitation.

[0115] As an example, taking a preset time period of 1 minute as an example, up to the [number]th [minute]... A data window of length 1 minute is constructed at each time point, denoted as the th time point. The nth window; calculate the nth window respectively. The variance of current and voltage within the nth window, i.e., the variance of the i-th... Current fluctuation at any given time Voltage fluctuation degree .

[0116] As an example, in conjunction with the first Current fluctuation at any given time Voltage fluctuation degree Calculate the first Stability of the circuit system at this time .

[0117] It should be noted that the larger the variance of the current and voltage in the overall circuit, the worse the stability of the overall circuit. Therefore, the stability... The calculation method can be:

[0118]

[0119] Here, norm() represents normalization calculation.

[0120] Based on the average temperature of the capacitors in the switching nodes and energy storage modules and the total amount of regenerative energy, the energy storage pressure coefficient of the overall circuit is calculated.

[0121] Based on the stability level and energy storage pressure coefficient, the real-time energy feedback coefficient is calculated.

[0122] As an example, the switching node is a synchronous rectifier diode SR, which is used to monitor reverse current. When reverse current occurs, the switching node is adjusted in time. When the total amount of stored regenerative energy is larger, the temperature of the SR junction and the capacitor in the synchronous rectifier power supply circuit will increase. When the temperature is higher and the total amount of stored regenerative energy is larger, the energy storage pressure coefficient is larger.

[0123] As an example, the average temperature is the average between the temperature of the switching node and the temperature of the capacitors in the energy storage module, and the energy storage pressure coefficient is... The calculation method can be:

[0124]

[0125] in, This represents the average temperature at time t. Let be the total amount of regenerative energy at time t, and norm() represents the normalized calculation.

[0126] As an example, in conjunction with the first Stability of the circuit system at this time and the Energy storage pressure coefficient of the circuit at this time Determine the first Real-time energy feedback coefficient .

[0127] It should be noted that the higher the stability of the circuit system and the greater the energy storage pressure, the greater the energy output during energy feedback. Based on this, the real-time energy feedback coefficient... The calculation method can be:

[0128]

[0129] in, This represents the energy storage pressure coefficient at time t. This represents the stability at time t.

[0130] Step S40: Calculate the theoretical duration of energy feedback output based on the real-time energy feedback coefficient, the total amount of feedbackable energy, and the energy consumption rate over a historical period.

[0131] As an example, the duration of energy feedback of the synchronous rectifier power supply circuit is analyzed based on the real-time energy feedback coefficient, the total amount of energy that can be fed back, and the energy consumption rate over a historical period. That is, when the energy accumulation rate is slightly less than the consumption rate, the energy feedback time is longer, and when the energy accumulation rate is much less than the consumption rate, the feedback time is shorter. The theoretical duration of energy feedback output is calculated first.

[0132] Step S40 includes:

[0133] The accumulation rate of the regenerative energy under the current circuit is calculated based on the difference in the total amount of regenerative energy at each adjacent time within any energy feedback interval.

[0134] As an example, according to the first Total amount of recoverable energy at any time within the secondary energy feedback interval Calculate the accumulation rate of the total amount of regenerative energy under the current circuit. The upcoming energy feedback will be the [number]th [event / event]. Each energy feedback cycle has a duration, which is called the energy feedback interval.

[0135] As an example, with the first Taking the accumulation speed of regenerative energy as an example, the accumulation speed The calculation method can be:

[0136]

[0137] in, Indicates the time interval between data collection moments; Indicates the relationship with the first The total number of moments within the energy feedback interval. This represents the total amount of regenerative energy at time x. This represents the total amount of regenerative energy at time x-1.

[0138] Obtain the energy consumption rate of the output terminal within a historical time period, and calculate the average energy consumption rate.

[0139] The theoretical duration of energy feedback output is calculated based on the average consumption rate, accumulation speed, total amount of energy that can be fed back, and real-time energy feedback coefficient.

[0140] As an example, based on historical data, the energy consumption rate when energy is fed back to the output. Calculate the historical average energy consumption rate to obtain the average consumption rate. .

[0141] As an example, the theoretical duration of the current j-th energy feedback is... The calculation method is as follows:

[0142]

[0143] in, Let be the total amount of recyclable energy at time t. The energy feedback coefficient at time t is the real-time energy feedback coefficient. This represents the average consumption rate. This indicates the current rate at which recoverable energy is accumulating.

[0144] Step S50: Based on the changes in circuit data during the historical operation of the load, determine the feasible index for transmitting energy to the load and the corresponding feedback timing.

[0145] As an example, the timing of energy feedback to the load circuit in a synchronous rectifier power supply circuit can greatly affect the stability of the load circuit. When energy is fed back to the output at the right time, the energy utilization rate can be greatly improved and the wear and tear on the equipment components can be reduced. Conversely, when the timing of energy feedback is abnormal, it will amplify the fluctuation of current and voltage in the circuit, which will not only fail to improve the energy utilization rate, but also aggravate the damage to the components.

[0146] As an example, by analyzing the real-time operating status of the load circuit / load end and the load's operating plan, the demand changes of the load circuit can be determined, and by combining the real-time feedback coefficient and the total amount of feedback energy, the timing and amount of feedback can be determined.

[0147] As an example, the feasibility index is used to indicate the feasibility of energy feedback. When the feasibility index exceeds a certain threshold, energy feedback needs to be stopped.

[0148] Step S50 includes:

[0149] Acquire historical operational change data during the operation of the load, including current change data and voltage change data;

[0150] The minimum feedback energy is calculated based on the product of current change data and voltage change data.

[0151] As an example, based on historical data changes during load operation in the load circuit, the average data change amplitude of the load is determined and recorded as the minimum feedback energy at the load end. ;

[0152]

[0153] in, This indicates the number of times energy consumption changes significantly during load operation; Indicates the first The magnitude of load energy change when energy consumption changes; Indicates the first The magnitude of the load current change when energy consumption changes, i.e., the current change data. This represents the change in load voltage, that is, voltage change data.

[0154] Based on the minimum feedback energy, the total amount of feedback energy, and the real-time energy feedback coefficient, the energy feedback feasibility index at each time point is calculated.

[0155] As an example, to ensure circuit stability during energy feedback, feedback can only be performed when the total amount of feedback energy in the circuit meets the minimum requirement. If the total amount of feedback energy does not meet the minimum requirement, the voltage of the load circuit may not meet the operating requirements of the load, leading to abnormal operation of the load. Furthermore, energy feedback needs to be combined with the real-time energy feedback coefficient of the feedback energy. The larger the current real-time energy feedback coefficient, the more energy can be used for feedback.

[0156] As an example, taking time t as an example, exponential... The calculation method can be:

[0157]

[0158] in, This represents the total amount of energy that the circuit needs to feed back (the actual total amount of energy that can be fed back), which is the product of the total amount of energy that can be fed back and the real-time energy feedback coefficient. The normalized range of the value is [-1, 1]. This represents the minimum energy return, and the energy return capability index. The larger the value, the more likely it is that the accumulated energy can compensate for most of the changes in load energy consumption.

[0159] When the actionable index exceeds the preset index threshold, the time corresponding to the actionable index will be used as the feedback opportunity.

[0160] As an example, the preset index threshold can be 0.4, 0.5, etc., and there is no specific limitation.

[0161] As an example, taking a preset index threshold of 0.4 as an example, when the energy feedback is feasible index Energy can be fed back to the output at any time, and the feedback timing is when the load shows a change in energy consumption.

[0162] Step S60: Based on the feasible index and theoretical duration, energy feedback is performed on the load side.

[0163] As an example, based on the feasibility index of energy feedback and the duration of energy feedback / theoretical duration This enables the redundant energy in the circuit to be fed back to the output.

[0164] Step S60 includes:

[0165] If the exponential is greater than the preset threshold and the duration of energy feedback is less than or equal to the theoretical duration, then energy feedback to the load will continue.

[0166] If the exponential is less than or equal to the preset threshold and the duration of energy feedback is greater than the theoretical duration, then energy feedback to the load side will be stopped.

[0167] As an example, the energy feedback method is determined based on the feasibility index and the theoretical duration, when the feasibility index of energy feedback... Or the duration of energy feedback is longer than the theoretical duration. When the output is in a certain condition, energy feedback to the output stops; otherwise, energy feedback to the load continues.

[0168] After step S60, the following is included:

[0169] The real-time operating status of the overall circuit, including the synchronous rectifier power supply circuit, is analyzed. If the analysis results indicate that the circuit is operating abnormally, the operation of the overall circuit is stopped and a circuit warning is reported.

[0170] As an example, by analyzing the real-time operating status of the circuit, when an abnormality occurs, the circuit operation is stopped in a timely manner and an early warning is issued. The circuit abnormality determination method is as follows:

[0171] Real-time data acquisition and threshold comparison: Continuously acquire data from multiple types of sensors (voltage, current, temperature, etc.) and compare the real-time data with preset safety thresholds (such as maximum allowable current, temperature limit, voltage fluctuation range, etc.).

[0172] Abnormal state determination: If any sensor data exceeds the safety threshold (e.g., excessive temperature, excessive reverse current, abnormal voltage fluctuation), the circuit is determined to be malfunctioning.

[0173] Perform protection operations: immediately stop the energy feedback process, turn off the synchronous rectifier MOSFET (SR) or ZD1 path to prevent the fault from escalating, and switch to passive protection mode (such as dissipating excess energy through the damping resistor).

[0174] Trigger the early warning mechanism: Send alarm signals through the controller (such as lighting up indicator lights, sending digital signals to the host computer or cloud platform), and record abnormal data (time, abnormal type, value) for subsequent diagnosis.

[0175] System recovery check: After the abnormality is resolved (such as the temperature returning to normal and the current stabilizing), the energy feedback function needs to be restarted manually or automatically, and the monitoring and calculation process of steps S10 to S60 needs to be re-executed.

[0176] This application provides a synchronous rectification power supply method with energy feedback to the output. By acquiring real-time operating data of the synchronous rectification power supply circuit, and based on the real-time operating data corresponding to the energy storage module and the first diode during conduction, the total amount of feedback energy of the synchronous rectification power supply circuit at each moment is calculated. Then, based on the real-time operating conditions of the synchronous rectification power supply circuit, the energy feedback coefficient is calculated. Furthermore, based on the real-time energy feedback coefficient, the total amount of feedback energy, and the energy consumption rate within a historical time period, the theoretical duration of energy feedback output is calculated. Based on the changes in circuit data during the historical operation of the synchronous rectification power supply circuit, the timing of energy feedback to the load is determined. Based on the feedback timing and the theoretical duration, energy feedback is performed to the load. Thus, the total amount of feedback energy in the energy storage module and feedback path is accurately calculated. Combined with the real-time operating conditions of the circuit, the feedback coefficient and feedback timing are dynamically adjusted to reduce waste, improve energy utilization, and reduce significant fluctuations in current and voltage.

[0177] This application embodiment also provides a synchronous rectification power supply circuit in which energy can be fed back to the output, the circuit including:

[0178] The system includes a synchronous rectifier chip, an energy storage module, and a first diode. The energy storage module includes a first capacitor and a second capacitor. The synchronous rectifier chip is electrically connected to the first capacitor, the second capacitor, and the first diode. The energy storage module is used to provide the regenerative output energy from the total regenerative energy transmitted to the load. The first diode is used to transmit the total regenerative energy to the load.

[0179] As an example, a schematic diagram of a synchronous rectified power supply circuit where energy can be fed back to the output is shown below. Figure 2 As shown, the synchronous rectifier chip serves as the control unit of the synchronous rectifier power supply circuit. Crg1 and Crg2 refer to the first capacitor and the second capacitor, respectively. Zener diode ZD1 represents the first diode. In addition to transmitting the total amount of regenerative energy to the load end, the first diode is also used to collect the regenerative energy left when the first diode is turned off. This part of the energy is fed back to the output end during the next conduction process.

[0180] Reference Figure 3 , Figure 3 This is a schematic diagram of the device structure of the hardware operating environment involved in the embodiments of this application.

[0181] like Figure 3 As shown, the synchronous rectified power supply device that can feed energy back to the output may include: a processor 1001, a memory 1003, and a communication bus 1002. The communication bus 1002 is used to realize the connection and communication between the processor 1001 and the memory 1003.

[0182] Optionally, the synchronous rectified power supply device that can feed energy back to the output may also include a user interface, a network interface, a camera, RF (Radio Frequency) circuitry, sensors, a WiFi module, etc. The user interface may include a display screen, an input submodule such as a keyboard, and optionally, standard wired or wireless interfaces. The network interface may include standard wired or wireless interfaces (such as a Wi-Fi interface).

[0183] Those skilled in the art will understand that Figure 3 The synchronous rectified power supply structure shown in the figure does not constitute a limitation on the synchronous rectified power supply device that can feed energy back to the output. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0184] like Figure 3 As shown, the memory 1003, serving as a storage medium, may include an operating system, a network communication module, and a synchronous rectifier power supply program that allows energy to be fed back to the output. The operating system is a program that manages and controls the hardware and software resources of the synchronous rectifier power supply device that allows energy to be fed back to the output, supporting the operation of the synchronous rectifier power supply program and other software and / or programs. The network communication module is used to enable communication between the various components within the memory 1003, as well as communication with other hardware and software in the synchronous rectifier power supply system that allows energy to be fed back to the output.

[0185] exist Figure 3 The energy shown can be fed back to the output synchronous rectification power supply device. The processor 1001 is used to execute the synchronous rectification power supply program that can feed back energy to the output stored in the memory 1003, and implement the steps of the synchronous rectification power supply method that can feed back energy to the output as described above.

[0186] The specific implementation method of the synchronous rectified power supply device that can feed energy back to the output in this application is basically the same as the embodiments of the synchronous rectified power supply method that can feed energy back to the output described above, and will not be repeated here.

[0187] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0188] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0189] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0190] The above are merely preferred embodiments of this application and do not limit the scope of this application. Any equivalent structural or procedural transformations made based on the description and drawings of this application, or direct or indirect applications in other related technical fields, are similarly included within the scope of protection of this application.

[0191] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0192] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

Claims

1. A synchronous rectified power supply method in which energy can be fed back to the output, characterized in that, The method is applied to a synchronous rectification power supply circuit, the synchronous rectification power supply circuit including an energy storage module and a first diode, and electrically connected to the load terminal, the method comprising: Obtain real-time operating data of the synchronous rectifier power supply circuit; Based on the energy storage module and the real-time operating data corresponding to the conduction process of the first diode, the total amount of regenerative energy of the synchronous rectification power supply circuit at each moment is calculated. Based on the total amount of regenerative energy and the real-time operating data of the synchronous rectifier power supply circuit, the real-time energy feedback coefficient is calculated. The theoretical duration of energy feedback output is calculated based on the real-time energy feedback coefficient, the total amount of feedbackable energy, and the energy consumption rate over a historical period. Based on the changes in circuit data during the historical operation of the load, the feasibility index for transmitting energy to the load and the corresponding feedback timing are determined. Based on the feasible index and the theoretical duration, energy is fed back to the load.

2. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, The calculation of the total regenerative energy of the synchronous rectifier power supply circuit at each moment, based on the real-time operating data of the energy storage module and the first diode during conduction, includes: Based on the real-time operating data in the energy storage module, the real-time redundant feedback output energy is calculated. Based on the regenerative output energy and the real-time operating data corresponding to the conduction process of the first diode, the total regenerative energy of the synchronous rectifier power supply circuit at each moment is calculated.

3. The synchronous rectification power supply method with energy feedback to the output as described in claim 2, characterized in that, The calculation of real-time redundant feedback output energy based on real-time operating data from the energy storage module includes: For any given moment, the difference between the capacitor voltage value and the discharge valley value in the energy storage module at the current moment is taken as the total voltage fluctuation amplitude of the capacitor at the current moment. Based on the total voltage fluctuation amplitude and the capacitance value corresponding to the capacitor, the total stored energy of the capacitor at the current moment is calculated. Obtain the sustaining voltage required for circuit operation, and calculate the required energy in the capacitor based on the capacitor value, the sustaining voltage, and the minimum voltage at each moment in the real-time operating data of the energy storage module. Based on the difference between the total stored energy and the required energy, the real-time redundant feedback output energy is calculated.

4. The synchronous rectification power supply method for energy feedback to the output as described in claim 2, characterized in that, The total amount of regenerative energy of the synchronous rectifier power supply circuit at each moment is calculated based on the regenerative output energy and the real-time operating data corresponding to the conduction process of the first diode, including: Based on the current value and load voltage value at each moment in the real-time operating data during the conduction process of the first diode, the energy collected in the feedback path where the first diode is located at each moment is determined. Based on the on and off times of the feedback path, the collected energy is integrally calculated to obtain the total collected energy of the feedback path. Based on the feedback output energy and the total collected energy, the total feedback energy of the synchronous rectifier power supply circuit at each time point is calculated.

5. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, The calculation of the real-time energy feedback coefficient based on the total amount of regenerative energy and the real-time operating data of the synchronous rectifier power supply circuit includes: Based on the voltage and current data of the input terminal and load terminal of the synchronous rectifier power supply circuit within a preset time period, the voltage fluctuation and current fluctuation at each moment are calculated. Based on the voltage and current fluctuation levels, the stability of the overall circuit at each moment is calculated. Based on the average temperature of the capacitors in the switching nodes and energy storage modules, and the total amount of regenerative energy, the energy storage pressure coefficient of the overall circuit is calculated. Based on the stability level and the energy storage pressure coefficient, the real-time energy feedback coefficient is calculated.

6. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, The calculation of the theoretical duration of energy feedback output based on the real-time energy feedback coefficient, the total amount of feedbackable energy, and the energy consumption rate over a historical period includes: Based on the difference in the total amount of recoverable energy at each adjacent time within any energy feedback interval, the accumulation rate of recoverable energy under the current circuit is calculated. Obtain the energy consumption rate of the load end within a historical time period, and calculate the average consumption rate of the energy consumption rate; Based on the average consumption rate, the accumulation speed, the total amount of energy that can be fed back, and the real-time energy feedback coefficient, the theoretical duration of energy feedback output is calculated.

7. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, The determination of the feasibility index for transmitting energy to the load and the corresponding feedback timing based on the changes in circuit data during the historical operation of the load includes: Acquire historical operational change data during the operation of the load, including current change data and voltage change data; The minimum feedback energy is calculated based on the product of the current change data and the voltage change data. Based on the minimum feedback energy, the total amount of feedback energy, and the real-time energy feedback coefficient, the energy feedback feasibility index at each time point is calculated. When the feasible index is greater than the preset index threshold, the time corresponding to the feasible index is taken as the feedback opportunity.

8. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, The energy feedback to the load end based on the feasible index and the theoretical duration includes: If the exponential value is greater than the preset exponential threshold and the duration of energy feedback is less than or equal to the theoretical duration, then energy feedback to the load will continue. If the exponentially operable exponent is less than or equal to a preset exponential threshold, and the duration of energy feedback is greater than the theoretical duration, then energy feedback to the load end is stopped.

9. The synchronous rectification power supply method for energy feedback to the output as described in claim 1, characterized in that, After performing energy feedback to the load based on the feasible index and the theoretical duration, the method further includes: The real-time operating status of the overall circuit, including the synchronous rectification power supply circuit, is analyzed. If the analysis results indicate that the circuit is operating abnormally, the operation of the overall circuit is stopped, and a circuit warning is reported.

Images