5966 results about "Switching power" patented technology

The invention relates to a switching power supply control method, system and device and a storage medium, and the method comprises the steps: monitoring the voltage and current of the output end of a switching power supply, and the rate and amplitude of load change, and obtaining the real-time data of the load change; according to the real-time data of the load change, the change of the current load is identified, and a load change mode is obtained; dynamically adjusting operation parameters of the controller according to the load change mode; based on the real-time data of the load change, predicting the load change trend of the switching power supply in real time by using a pre-trained load prediction model to obtain a prediction result, and generating a disturbance compensation signal based on the prediction result; and adjusting the switching state of a switching circuit of the switching power supply according to the control parameter adjusted by the controller and the disturbance compensation signal. The switching power supply has the effect of improving the stability of the switching power supply.

The invention relates to the technical field of power electronics, in particular to a voltage ripple suppression and compensation method for a multi-output AC-DC switching power supply, and the method comprises the steps: obtaining the real-time voltage ripple signal of each AC-DC output channel and the working parameters of the switching power supply, and the working parameters comprise the switching frequency, the duty ratio, the inductance and capacitance parameters and the load current; inputting the real-time voltage ripple signal and the working parameters of the switching power supply into a preset coupling interference model, and generating ripple coupling characteristics between AC-DC output channels; determining a ripple suppression compensation coefficient through the ripple coupling characteristics; and based on the ripple suppression compensation coefficient and a preset PWM control signal, adjusting the output voltage of the switching power supply to suppress the ripple, thereby breaking through the limitation of a traditional method on independent processing of a single channel, and fundamentally solving the problem of a ripple suppression blind area caused by cross interference between channels.

The invention provides a double-pulse high-frequency switching power supply control method and system for precise electroplating, and relates to the field of electroplating, and the method comprises the steps: collecting area surface data through a three-dimensional scanner, and obtaining a three-dimensional model; extracting a high-curvature area grid according to the three-dimensional model, and calculating to obtain a surface concave-convex degree index; performing current field simulation, and calculating current density vector distribution; when the deviation of the current density vector distribution exceeds a preset deviation threshold value, pulse parameters are optimized through a genetic algorithm; selecting a pulse parameter which is most matched with the surface concave-convex degree index, and carrying out iterative calculation to obtain updated current density vector distribution; based on the difference between the updated current density vector distribution and the initial distribution, predicting a coating thickness value, and determining a preliminary evaluation index; and optimizing pulse parameters to obtain a final control scheme of uniform current distribution. According to the method, pulse parameters can be dynamically optimized according to the geometrical shape of the workpiece, and uniform current distribution and stable plating quality are realized.

The invention discloses an autonomous protection control method for abnormal feedback of an LED switching power supply, and the method comprises the steps: obtaining parameter data in a switching period based on power supply operation data in a historical database; the method comprises the following steps: constructing a prediction model of the running state of the LED switching power supply, sampling based on a real-time feature window of the LED switching power supply, outputting a state prediction vector and abnormal probability distribution of a future switching period, constructing a real-time state feature matrix, dynamically matching the real-time state of the LED switching power supply with a prediction abnormal mode, and calculating a feature similarity index. And designing a hierarchical protection mechanism, uploading complete event data to a database, updating a power supply abnormity prediction model, and dynamically adjusting a protection trigger threshold value based on a deviation degree between a prediction result and an actual state. The method has the advantages that accurate pre-judgment and grading protection of the abnormal probability are achieved, model self-optimization and threshold value self-adaptive adjustment are driven through real-time data, and the system reliability and the protection response sensitivity are remarkably improved.

A plurality of half-bridge LLC converters including a resonance circuit including resonant capacitors Cr1 to Crn are included as a circuit element 10, and a resonant capacitor Crk (k is a natural number of 1 to n) of each of the circuit element 10 has one end connected in series to a resonant reactor Lr and a primary winding N of a transformer T, and another end connected to the resonant capacitor Crk of another one of the circuit elements 10 so as to construct a k-dimensional multiphase LLC converter having a phase difference of 360° / Pk by Pk (Pk is any natural number of two or more) of the circuit elements 10, secondary windings S of a transformer of the circuit element 10 operating in the same phase are connected in series and the secondary windings are star-connected.

The invention belongs to the field of circuits, and provides a direct-current conversion circuit for suppressing overshoot, a switching power supply and electronic equipment. The circuit comprises a ripple injection module, a conversion module, a driving module, a feedback module, a signal detection module and a signal generation module, the conversion module is connected with the feedback module, the driving module, the ripple injection module and a load, and the feedback module is connected with the driving module and the ripple injection module. The signal generation module is respectively connected with the driving module and the signal detection module, and the signal detection module is connected with the ripple injection module. The first signal is generated through the signal generation module, the frequency of the first signal is the same as the switching frequency of the direct current conversion circuit, the first signal is detected through the signal detection module, and when the frequency of the first signal is smaller than the preset frequency, the ripple injection module is controlled to stop outputting the ripple signal; the upper tube is prevented from being started in the process that the load jumps from a heavy load to a light load, and overshoot suppression of the output voltage is achieved.

In a circuit element 10a, resonant circuits are arranged in parallel. A resonant capacitor Crkq of a q-th resonant circuit arranged in parallel has one end connected in series to a resonance reactor Lrq and a primary winding N1q of a transformer Trq. The resonant capacitor Crkq of the q-th resonance circuit arranged in parallel has another end connected to the resonant capacitor Crkq of a q-th one of the resonance circuit arranged in parallel in another one of the circuit elements 10a so that a k-dimensional multiphase LLC converter having a phase difference of 360° / Pk is constructed by Pk circuit elements.

The invention discloses a fault prediction method for a front-end isolated switching power supply of an aging table, and the method comprises the steps: carrying out the dimension reduction of preset time sequence signals of a plurality of aging table switching power supplies, and extracting feature parameters; calculating the performance degradation path similarity of the switch power supply of each aging station according to the characteristic parameters of each preset time sequence signal; clustering the degradation paths according to the performance degradation path similarity of the switch power supplies of the aging stations to obtain N degradation path sets; establishing N switching power supply life prediction models, and training the N switching power supply life prediction models according to the N degradation path sets; and based on the trained N switching power supply service life prediction models, predicting the service life of the aging station switching power supply to obtain the residual service life of the switching power supply. According to the aging table front-end isolated switching power supply fault prediction method considering multiple degradation paths provided by the invention, the residual service life of the switching power supply can be accurately predicted.

The invention discloses a low-voltage switch power distribution cabinet, and relates to the technical field of power distribution cabinets. Comprising a cabinet body, a dehumidification channel is arranged at the inner bottom of the cabinet body, one end of the dehumidification channel extends to the outside of one side of the cabinet body, an inclined block plug is arranged in the other end of the dehumidification channel, and a through hole is formed in the inclined block plug. Water in air can be effectively removed through a demisting plate and moisture absorption silica gel, wet air is prevented from entering the cabinet body, the wet air can be filtered through a filter screen, dust is prevented from entering the cabinet body, and the moisture absorption silica gel can be dried and repeatedly used through a heating pipe; the moisture absorption silica gel drying cabinet prevents hot air from entering the cabinet body in the process of drying the moisture absorption silica gel, wraps the dehumidification channel through the heat insulation cylinder, prevents heat of the heating pipe from being transmitted to the interior of the cabinet body through the dehumidification channel, and greatly reduces faults of electrical elements in the cabinet body caused by high heat or humid air.

The invention belongs to the field of circuits, and provides a direct current conversion circuit for enhancing transient response, a switching power supply and electronic equipment. The circuit comprises a conversion module, a comparison module, a ripple injection module, a time delay module, a driving module, a reset module and a switch module, the comparison module is connected with the conversion module, the time delay module, the ripple injection module, the switch module and a load, and the driving module is connected with the conversion module, the time delay module and the reset module. The time delay module is connected with the switch module and the reset module. When the feedback voltage is smaller than the reference voltage, namely before the upper tube is switched on each time, the switch module is controlled to be switched on, so that the first ripple signal and the second ripple signal are connected, the two ripple signals input to the comparison module do not have too large influence on loop control, and therefore in the process that the load jumps from light load to heavy load, the loop control is not influenced. Therefore, the suppression effect of injection ripples on the conduction of the upper tube can be weakened, the drop of the output voltage can be reduced, and the transient response of the circuit can be enhanced.

The invention relates to the field of switching power supply high-side current detection, in particular to a switching power supply high-side current detection method, which comprises the following steps of: acquiring current signals to form a sequence, acquiring an intrinsic mode by using empirical mode decomposition, analyzing each mode to construct a difference amplitude-frequency index, and calculating a noise index in combination with a similarity index and heterogeneity. According to the method, the de-noising window is intelligently adjusted, and the local outlier factor is utilized to detect the anomaly, so that accurate current anomaly identification is finally realized, the detection precision and the system intelligence level are remarkably improved, the resource utilization is optimized, and a powerful guarantee is provided for stable operation of a power system.

The invention discloses a control method and system for improving output precision of a switching power supply, and relates to the technical field of data processing. The method comprises the following steps: acquiring output voltage sampling values and output current sampling values of the switching power supply at a plurality of sampling time points; determining the current ripple amplitude of the switching power supply based on each output voltage sampling value and each output current sampling value; when the ripple amplitude exceeds an amplitude threshold, switching a control mode of the switching power supply to a preset adjustment mode, and determining a first adjustment step length according to the ripple amplitude; receiving a load parameter of the switching power supply, and determining a second adjustment step length according to the load parameter and the first adjustment step length; and in the preset adjustment mode, adjusting the switching power supply according to the second adjustment step length until the ripple amplitude of the switching power supply is within a standard amplitude range. By implementing the technical scheme provided by the invention, the effect of improving the output precision of the switching power supply is achieved.

The invention relates to an adaptive control method, system and device for a switching power supply and a storage medium, and the method comprises the steps: obtaining power supply parameter data in real time, and carrying out the preprocessing of the power supply parameter data, and obtaining standard state data; performing load analysis on the standard state data to obtain real-time load data, and determining a corresponding power supply modulation mode according to the real-time load data; obtaining standard state data in a preset time period, and inputting the standard state data into a pre-trained load prediction model to obtain a load prediction result; and determining a corresponding prediction modulation mode based on the load prediction result, and pre-inputting the prediction modulation mode by adopting a smooth switching algorithm so as to improve the response speed and stability of the system. The invention has the effect of improving the stability of the switching power supply.

A control circuit for a switching power supply with adaptive voltage positioning control, can include: a compensation signal generation circuit configured to receive a digital voltage reference signal, a digital voltage sampling signal representing an output voltage of the switching power supply, and a digital droop voltage, and to integrate an error between the digital voltage reference signal and a sum of the digital voltage sampling signal and the digital droop voltage, in order to generate a compensation signal; and an adaptive voltage positioning control circuit configured to generate a positioning signal according to the compensation signal, in order to adjust the output voltage.

A variable slew rate gate drive system for powering an electric machine. The system may include a gate driver operable for controlling each of a plurality of hybrid switch power modules between opened and closed states to facilitate powering the electric machine. The gate driver may be operable for selecting slew rates and controlling ON and OFF states of first and second semiconductor switches included as part of each power module to optimize powering of the electric machine by varying the slew rates as a function of performance characteristics of the first and second semiconductor switches.

The embodiment of the invention discloses a voltage conversion circuit and a switching power supply. A control module magnetizes or demagnetizes an inductor by controlling alternate conduction of a main switching tube and a follow current switching tube in a voltage conversion module, and charges and discharges a first capacitor. A virtual inductive current ripple signal is constructed through a virtual ripple generation module, and the virtual inductive current ripple signal replaces ESR information on a first capacitor to be superposed on a feedback voltage, so that after the feedback voltage is superposed with the virtual inductive current ripple signal, the phase difference between the feedback voltage and an inductive current is reduced, and the feedback voltage is reduced. The control module outputs a first control signal according to a virtual inductive current ripple signal and a feedback voltage to control the conduction time of the main switching tube and the follow current switching tube, so that the problem of harmonic oscillation caused by a time-lag effect between an inductive current and the output voltage on the first capacitor is solved, and the generation of harmonic waves is suppressed; the stability of the output voltage of the voltage conversion circuit is improved.

A controller for controlling a multi-phase power conversion system includes a pulse width modulation (PWM) comparator configured to generate a PWM signal based on a ramp signal, a voltage reference signal and a feedback voltage from the power conversion system. A circuit may be configured to generate, based on the PWM signal, PWM signals by delaying the PWM signal with different delay times, and feed the PWM signals to respective switching power converters of the multi-phase power conversion system, to regulate an output voltage of the power conversion system. Each switching power converter may include a control circuit configured to adjust a pulse width of a received PWM signal based on a reference current and an output current of a corresponding switching power converter, to generate an adjusted PWM signal, based on which, an output voltage of the corresponding switching power converter is regulated.

The invention provides a transformer type differential signal acquisition system and method, and relates to the technical field of signal acquisition, and the system comprises a switching power supply module which is used for supplying power to the system; the input module is used for collecting wire feedback signals; the operational circuit is used for rectifying the feedback signal, performing differential processing and filtering on the rectified feedback signal to obtain a differential filtering signal, adding bias voltage to the differential filtering signal, and amplifying the differential filtering signal to obtain an amplified signal; the analog-to-digital conversion module is used for converting the amplified signal into a digital signal; the CPU processing module is used for processing the digital signal, generating a control signal and sending the control signal to the output module and the communication module; the output module is used for generating current according to the control signal; and the communication module is used for sending the control signal to an upper computer through the communication interface, so that the upper computer calibrates the linear variable differential transformer. The linear variable differential transformer has the technical effect that the measurement precision of the linear variable differential transformer is improved.

The invention belongs to the field of electronic circuits, and provides a zero-cross detection circuit with an anti-crash function, a switching power supply and electronic equipment. The circuit comprises a current output module, a capacitor module, a switch module, a comparison module and a logic module, the capacitor module is connected with the current output module, the switch module and the comparison module, the current output module is connected with the switch module and a power module, and the logic module is connected with the switch module and the comparison module. And the current output module, the capacitor module and the switch module are also grounded. The logic module determines the working state of the circuit through the zero-crossing signal output by the comparison module, when the zero-crossing detection circuit enters a dead halt state, the reset signal is output according to the clock signal and the zero-crossing signal, and the switch module is controlled to be switched on periodically, so that the capacitor module is discharged periodically, the zero-crossing detection threshold value is reduced slowly, and the zero-crossing detection efficiency is improved. Finally, the zero-cross detection circuit can normally trigger zero-cross detection, and the reliability and efficiency of the switching power supply are improved.

A magnetic component and a switch power supply device are disclosed. The magnetic component includes a magnetic core and at least three windings, the magnetic core including at least three winding columns, at least one side columns, a first cover plate and a second cover plate opposite to each other, wherein the at least three winding columns are sequentially arranged in adjacent, the first cover plate and the second cover plate are respectively at upper parts or lower parts of the at least three winding columns and the at least one side column to form a closed magnetic flux loop; the at least three windings are wound on the at least three winding columns, respectively; wherein magnetic flux direction of the middle winding column in adjacent three winding columns is opposite to magnetic fluxes direction of the other two winding columns in adjacent three winding columns.

The invention provides a three-phase single-stage isolation rectifier and a power factor correction method thereof, and belongs to the technical field of switching power supplies. The three-phase single-stage isolation rectifier comprises a low-pass filtering unit, a sector selection unit, a DC / DC high-frequency conversion unit and a compensation conversion unit, wherein the low-pass filtering unit is connected with a three-phase alternating current, and the DC / DC high-frequency conversion unit is connected with a direct-current load; the sector selection unit comprises a first bridge circuit and a switching circuit, the compensation conversion unit comprises a power frequency switching unit and a high-frequency converter, the first input end of the power frequency switching unit is connected with a first terminal P, the second input end of the power frequency switching unit is connected with a third terminal Y, the third input end of the power frequency switching unit is connected with a second terminal N, and the second input end of the power frequency switching unit is connected with a third terminal Y; the output end of the power frequency switching unit is connected with the output end of the high-frequency converter, the first input end of the high-frequency converter is connected with the first terminal P, and the second input end of the high-frequency converter is connected with the second terminal N. The conversion efficiency of the isolation rectifier can be improved.

The invention relates to a driving control circuit and a switching power supply, the driving control circuit comprises a current sampling circuit and a light-load wave sealing circuit, the current sampling circuit is electrically connected with the light-load wave sealing circuit, the current sampling circuit samples current flowing through a load to obtain sampling current, and when the sampling current is greater than a current threshold value, the light-load wave sealing circuit is electrically connected with the light-load wave sealing circuit; the light-load wave sealing circuit outputs a first control signal to enable the second group of switching tubes to work based on a received second driving signal, so that the switching power supply rapidly quits the light-load wave sealing state, the current-carrying capacity of the switching power supply is rapidly improved, and when the sampling current is smaller than or equal to a current threshold value, the switching power supply is switched off. And the light-load wave sealing circuit outputs a second control signal to drive the second group of switching tubes to stop working, so that the second group of switching tubes are ensured to be closed in a light-load state, the switching loss during light load is effectively reduced, and the light-load energy efficiency is improved.

The invention relates to the technical field of digital control switching power supplies, and particularly discloses a switching power supply dynamic response adjusting system based on digital control, which comprises a digital controller, a multi-channel analog-to-digital conversion module, a parameter identification module, a self-adaptive control law adjusting module, a pulse width modulation driving module and a stability monitoring module. On-line identification of key parameters of a system is realized by constructing a nonlinear state space model and combining an extended Kalman filtering algorithm, dynamic compensation is carried out for non-minimum phase characteristics such as a right half plane zero point, and a self-adaptive control law adjustment module optimizes a control strategy in real time according to an updated model. A Lyapunov stability criterion and a predictive control mechanism are introduced, the robustness and response speed of the system are improved, and a stability monitoring module identifies an abnormal state through sliding window variance analysis and peak detection and triggers a fault-tolerant mechanism to guarantee safe operation of the system.

The invention discloses a buck-boost circuit-based mppt charging current backflow prevention control method, and relates to the technical field of switching power supplies, and the method comprises the steps: collecting a photovoltaic input voltage, a battery output voltage, and an inductive current flowing through an inductor; the current input power is calculated based on the photovoltaic input voltage and the inductive current, and the reference voltage is dynamically adjusted through an MPPT loop algorithm; pI voltage loop operation is carried out on the output voltage and the adjusted reference voltage, and expected charging current is generated; pI current loop operation is carried out on the expected charging current and the inductive current sampling value after proportionality coefficient adjustment, and a PWM duty ratio control signal is output to adjust the driving states of the four switching tubes; when the judgment circuit is in an intermittent conduction mode and meets critical conditions, a driving signal of the fourth switching tube is shielded, and only a body diode realizes a current path to prevent reverse flow of current; the battery current is effectively prevented from flowing backwards, and the system safety and the energy utilization efficiency are improved.

The embodiment of the invention provides a method and device for evaluating the health state of a front-end isolated switching power supply of an aging table, and relates to the technical field of aging tests.The method comprises the steps that in the aging test process, the front-end isolated switching power supply of the aging testbed can generate monitoring signals such as voltage and current; a directly measured monitoring signal is large in data size and contains a large amount of redundant information, firstly, feature extraction is conducted on directly measured data, and a feature sequence with high information density is obtained; further spatial mapping is carried out on the feature sequence by using a neighbor component analysis algorithm, and automatic segmentation of the health state and the degradation state of the new test sample is realized; and performing quantitative calculation of the health state on the mapped feature sequence by using a multi-distance measurement fusion algorithm with automatic weight optimization, and completing health assessment of the front-end isolated switching power supply of the aging test stand.

A resonant capacitor Crk (k is a natural number of one to n) of each circuit element has one end connected in series to a resonant reactor Lr and a primary winding N1 of a transformer T, and another end connected to the resonant capacitor Crk of another circuit element 10 so that a dimensional multiphase LLC converter having a phase difference of 360° / Pk is constructed by Pk (Pk is an optional natural number) of the circuit elements 10.

The invention relates to the technical field of lithium battery charging under photovoltaic panel power supply, in particular to a Buck-Boost lithium battery intelligent charging method based on ML-MPPT and dynamic reference voltage regulation, and the method comprises the steps: dividing a charging stage into a trickle charging stage, a constant-current charging stage and a constant-voltage charging stage according to the voltage of a lithium battery; the method comprises the following steps: acquiring environment temperature, solar illuminance and maximum power point voltage data in a constant current stage, preprocessing the data, training a maximum power point voltage prediction machine learning model, distilling the model to obtain a compression model, and deploying the compression model on a microcontroller; real-time environment data is input into the model to predict and obtain the maximum power point voltage as the reference voltage, the output voltage of the photovoltaic panel is sampled, and the input voltage of the Buck-Boost circuit is controlled by using the innovative PWM control system, that is, the duty ratio of PWM pulses is controlled through the microcontroller, the input impedance of the Buck-Boost circuit is adjusted, and the output voltage of the Buck-Boost circuit is adjusted. The output voltage of the photovoltaic panel, namely the input voltage of the switching power supply, is adjusted to the maximum power point voltage according to environmental conditions; and dynamically switching the lithium battery in different charging stages according to the battery state and the input power. The method integrates machine learning into prediction of the maximum power point voltage, and is suitable for an intelligent charging scene of the lithium battery under photovoltaic power supply.

The invention provides a self-powered circuit of a switching power supply and the switching power supply, and the self-powered circuit comprises a first linear voltage stabilizing circuit which is connected between a common connection end of a main power tube and an auxiliary power tube and a power supply capacitor; the second linear voltage stabilizing circuit is connected with the second linear circuit in parallel; the adjusting circuit is connected with the second linear voltage stabilizing circuit and generates adjusting voltage to adjust the first charging current flowing through the second linear voltage stabilizing circuit when the second linear voltage stabilizing circuit is switched on; wherein after the switching power supply is started, the first linear voltage stabilizing circuit is switched on, and the power supply capacitor is charged; and when the PWM signal generated by the control chip of the switching power supply is effective, the second linear voltage stabilizing circuit is controlled to be switched on. According to the invention, power supply loss can be saved and system EMI can be optimized.

The invention provides an active-disturbance-rejection control method for an electromagnetic bearing two-level digital switching power amplifier embedded with model information. The method comprises the steps that an electromagnetic bearing two-level digital switching power amplifier mathematical model suitable for controller design is established based on the Fourier series theory and coil current characteristics; a direct current component in the mathematical model is defined as a modeling disturbance term, and feedforward compensation is directly carried out in the control law; parameter perturbation and an unmodeled part in the mathematical model are defined as unknown perturbation items, and real-time estimation is carried out through an extended state observer; a current item and a control input item in the mathematical model are used as known model information to be embedded into the design of the extended state observer; designing a feedback control law to carry out real-time compensation on the current item, the modeling disturbance item and the unknown disturbance item; a zero-order retainer and a current observer are adopted to carry out discretization processing on the controller, and the discretization processing is realized on a digital control platform based on a DSP (Digital Signal Processor). The method is high in current response speed and high in control precision.

The invention provides a voltage stability control method for a multi-output switching power supply, which comprises the following steps of: sampling a main output channel in real time to obtain a voltage signal; the voltage signal is processed through a wide bandwidth error amplifier, a main channel adjusting signal is generated, and the main channel adjusting signal is used for driving a main power switch device; receiving an input voltage fluctuation frequency band of an auxiliary channel, a load current transient change gradient and a frequency spectrum coupling characteristic of a main channel adjusting signal through a dynamic prediction model, and generating an auxiliary channel adjusting signal with a phase lead compensation characteristic; a cross coupling active offset mechanism is constructed, time domain-frequency domain characteristics of coupling interference are extracted through a high-precision differential detection circuit, amplitude-frequency adjustable reverse correction signals are generated in real time through an adaptive compensation algorithm and injected into control nodes of an auxiliary output channel, and dynamic decoupling and ripple suppression are carried out. According to the method, high-stability control of multi-channel voltage under all working conditions is realized, and the dynamic response speed and the anti-interference capability are improved.