3063 results about "Ripple" patented technology

The invention relates to a power supply switching control optimization method and system, and the method comprises the steps: constructing a multi-dimensional data fusion monitoring system, integrating a real-time voltage ripple coefficient detection module of a main power supply, a load transient response analysis module and an environment temperature and humidity sensor array, and generating a dynamic health degree index; the method comprises the following steps: establishing a fault prediction model based on transfer learning, pre-training through multi-scene failure data in a historical database, receiving a health degree index in real time, outputting a reliability attenuation curve, and activating a dual verification mechanism when the slope of the attenuation curve exceeds a preset threshold; extracting characteristic energy distribution of a frequency band of 0.1-10 kHz; executing a transient load impact test, and measuring dynamic response parameters of voltage recovery time and overshoot amplitude; and generating a switching confidence score based on cross processing of the dual verification result and the attenuation curve, and triggering a hierarchical switching instruction. The accuracy of the switching time of the main power supply and the standby power supply can be improved.

The invention relates to the technical field of battery management systems, in particular to a distributed battery state estimation and compensation method based on voltage and current sampling, which comprises the following steps: constructing an original characteristic matrix by synchronously acquiring voltage and current waveforms and extracting ripple characteristics and slope abrupt change points, and generating a characteristic tensor with environment correction through a coupling compensator; then constructing a state parameter space based on adaptive particle injection and an electrochemical-thermodynamic coupling model; adopting a multi-source data fusion engine to realize distributed collaborative estimation of a health state index and a charge state confidence interval, and completing SOC, SOH and temperature trend prediction and residual compensation correction through a multi-state dynamic prediction model; and based on the prediction result and the uncertainty boundary, constructing an energy compensation optimization model, and searching a Pareto optimal compensation strategy. The method can be widely applied to intelligent management and control in the fields of battery energy storage systems and electric power equipment.

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 relates to the technical field of power supply detection, and discloses a fire-fighting equipment power supply detection method and system.The detection method comprises the following steps that voltage fluctuation, current phase and ripple coefficients are collected through a multi-channel sensor group, a feature sequence is generated through sliding window noise reduction, the Euclidean distance is calculated through Z-score standardization, and a calibration instruction is generated when a threshold value is exceeded; kalman filtering adjusts frequency output detection parameters, fast Fourier transform is executed to extract harmonic amplitude to generate a suppression vector, and a least square reconstruction model outputs a state identifier; according to the method, voltage, current and ripples are collected through multiple channels, anti-interference performance and data integrity are enhanced through sliding window noise reduction, a threshold value is adjusted through Z-score and Euclidean distance self-matching, sampling frequency and detection parameters are optimized through Kalman filtering, harmonic characteristics are extracted through FFT, and the state is evaluated through a least square reconstruction model. And a multi-dimensional classification system is constructed by fusing the distortion rate and the phase deviation, so that the detection precision, the sensitivity and the response real-time performance are improved.

The invention relates to the technical field of circuit control, in particular to a control method and system of a bidirectional charging and discharging circuit. The method comprises the following steps: collecting current monitoring data and voltage monitoring data of a bidirectional charging and discharging circuit in real time; performing arc characteristic analysis on the current monitoring data and the voltage monitoring data to obtain arc characteristic data; analyzing a high-frequency harmonic component and a current ripple fluctuation amplitude of the bidirectional charging and discharging circuit based on the arc characteristic data; performing direct-current arc detection on the bidirectional charging and discharging circuit according to the high-frequency harmonic component and the current ripple fluctuation amplitude to generate a direct-current arc fault judgment result; and calculating the instantaneous current change rate of the current monitoring data, and carrying out short-circuit detection on the bidirectional charging and discharging circuit through the instantaneous current change rate. By monitoring current and voltage data in real time, arc and short circuit characteristics are accurately analyzed, relay control is optimized, an accurate control instruction is generated, and the safety and reliability of the two-way charging and discharging circuit are improved.

The invention discloses a secondary ripple optimization method based on star cascade H bridge injection three-time zero sequence voltage. The method comprises the following steps: acquiring real-time voltage and current data of a system, performing dynamic harmonic analysis on the acquired data, generating a harmonic compensation signal, and generating an optimized control signal; constructing a multi-objective optimization model based on the optimized control signal and pre-stored system parameters, solving the model to obtain a Pareto optimal solution set, and selecting an optimal cubic zero-sequence voltage parameter from the Pareto optimal solution set; based on the optimal cubic zero-sequence voltage parameters, constructing a system dynamic model, constructing an adaptive prediction controller, generating an optimal control sequence, and performing closed-loop feedback adjustment; the ripple suppression effect is evaluated, the ripple suppression proportion is calculated by comparing the secondary ripples before and after the third zero-sequence voltage is injected, and the control parameters are dynamically adjusted according to the result. And the adaptability and precision of harmonic analysis are greatly improved. The problem that secondary ripples rise when the star cascade device compensates reactive power is effectively solved.

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.

The invention provides a multi-dimensional electrical equipment insulation analysis and evaluation method, and relates to the technical field of electrical equipment insulation online detection and intelligent diagnosis. According to the method, an electrically isolated direct current detection channel is constructed in a neutral point small resistance grounding system, controllable direct current detection signals are injected, micro direct current leakage response signals are collected, and after zero drift correction, temperature compensation and power frequency ripple suppression are carried out, layered attribution is carried out in combination with primary system topology and an equipment ledger, and a multi-dimensional response matrix is formed. According to the method, environment and working condition normalization is realized through factor rejection and robust pull-back, a mechanism model containing leakage channel equivalent parameters and path constraints is established, multi-working-condition data is fused to calculate equivalent insulation parameters and credibility indication quantity, and a multi-dimensional insulation representation vector is generated. And performing time sequence analysis on the representation vector, extracting degradation and abrupt change characteristics, outputting a health index and a risk level, and realizing quantitative evaluation and intelligent early warning of the insulation state.

The invention provides a self-adaptive constraint model active mismatch prediction control method based on voltage and current ripple resistance of a power converter in a hybrid energy storage system, and the method comprises the steps: building an island DC micro-grid system model, collecting the voltage and current information of a system, and designing a model prediction control frame of a power loop and a cost function of the model prediction control frame; designing a model predictive control framework of the current loop and a cost function of the model predictive control framework; designing an active model mismatch mechanism to enhance the response capability to dynamic change; determining an optimization problem with a normal value, and designing an adaptive constraint optimization algorithm to dynamically adjust constraint parameters and optimize control performance; and designing a steady-state and dynamic-mode trigger for adapting to the running state of the system. According to the invention, the trajectory tracking precision of the system under dynamic and steady-state working conditions can be significantly improved, current ripples caused by control delay can be effectively eliminated, damage to electrical equipment due to overlarge ripples can be avoided, and the service life of the equipment can be prolonged.

According to the control method of the Si IGBT and SiC MOSFET mixed frequency parallel system, when an open-circuit fault occurs in the SiC MOSFET high-frequency unit, the Si IGBT low-frequency unit works independently; under the light load working condition within the safe working range of the device, the SiC MOSFET high-frequency unit works independently; under the normal working condition, the Si IGBT low-frequency unit and the SiC MOSFET high-frequency unit share a common direct-current power supply and work in a coordinated mode, the Si IGBT low-frequency unit processes large power, the SiC MOSFET high-frequency unit compensates switch ripples generated by the Si IGBT low-frequency unit, specifically, the SiC MOSFET high-frequency unit adopts mQPR control and compensates third to twenty-third harmonic waves generated by an LFU, the Si IGBT low-frequency unit adopts SHEPWM control, the third to thirteenth harmonic waves generated by the Si IGBT low-frequency unit are reduced, and the switching ripple waves generated by the Si IGBT low-frequency unit are reduced. Therefore, the capacity requirement on the HFU is reduced.

The invention discloses a protection measurement and control device power supply fault early warning method and system and a storage medium. The invention aims to solve the problem that fault early warning and detection cannot be accurately carried out when power supply fault early warning is carried out by monitoring ripple change in the prior art. The method comprises the following steps: establishing a transition mapping relation from a normal state to a fault state according to physical parameter characteristic changes in a historical fault scene; respectively acquiring each physical parameter characteristic according to a set sampling frequency, and respectively adjusting each sampling frequency according to the sampled physical parameter characteristics; the sampled physical parameter characteristics are imported into a power supply fault early warning model, and a fault scene of the power supply of the measurement and control device is matched; and executing preset processing preparation according to the matched and predicted fault scene. And a power supply fault early warning and evaluation model is established according to the transition mapping relationship, so that the fault occurrence precursor can be found as early as possible, and the power supply fault early warning and detection cannot be accurately carried out.

The invention belongs to the technical field of power supply management, and particularly relates to a high-precision DCDC power supply voltage stabilization calibration system and method, which comprises a DCDC power conversion module, a traditional feedback control module, a high-frequency ripple sampling and digitization module, a dynamic load prediction module, a feedforward compensation generation module and a calibration management module, through high-frequency ripple sampling and digital output of ripple signals, real-time spectrum analysis is carried out to predict load transient changes, prospective compensation signals are generated, and traditional feedback control is combined to finely adjust PWM signals of the DCDC module. According to the scheme, feedback lag is overcome, transient overshoot / undershoot of voltage is remarkably restrained, the dynamic voltage stabilization error is controlled within + / -0.3%, and high-precision voltage stabilization under both static and dynamic working conditions is achieved.

The invention discloses a method for realizing dynamic regulation and control of battery charging of a battery swap station control system, particularly relates to the field of battery charging control of a battery swap station, and aims to solve the problems of impedance mismatch and non-uniform current of a charging module by analyzing a ripple current waveform of the charging module and extracting impedance phase characteristics to generate a dynamic impedance difference matrix. On the basis of the matrix, calculating generalized entropy of impedance mismatch and topology reconstruction dynamic gain, optimizing charging module connection, dynamically establishing a parallel charging module group, and balancing current and relieving current unevenness through an anti-phase compensation signal; pWM waveform phase offset adjustment is utilized to realize staggered distribution of switching actions, and the ripple influence is reduced; the virtual charging unit is combined with bus voltage volatility analysis to deduce a charging power demand in real time and optimize power distribution; in addition, based on a three-dimensional temperature field model and a topology secondary reconstruction mechanism, local overheating is quickly responded, the adaptability, reliability and operation efficiency of the charging process are improved, and the service life of equipment is prolonged.

The invention discloses a direct current charging pile module without an electrolytic capacitor and an output ripple control method thereof, the direct current charging pile module only adopts a non-electrolytic capacitor, and the output ripple control method comprises a frequency conversion control strategy and an output ripple control strategy. Adjusting the switching period of a switching tube in the post-stage DC / DC converter according to the frequency conversion control strategy; according to the output ripple control strategy, a switching period compensation result is obtained through calculation according to the output ripple change trend, and the switching period of a switching tube in a post-stage DC / DC converter is further adjusted on the basis of frequency conversion control so as to suppress the output ripple. Compared with the prior art, the direct-current charging pile module only adopts the non-electrolytic capacitor, so that the service life and the reliability of the whole direct-current charging pile module are improved; the output of a post-stage DC / DC converter is stabilized near an expected value through a frequency conversion control strategy, and an additional output ripple control strategy is used for solving the problem that the output ripple is relatively large under the condition of no electrolytic capacitor.

The invention discloses a low-output-ripple automatic-current-sharing interleaving buck converter and a control method thereof.The converter comprises a main power circuit and an auxiliary compensation circuit, and the main power circuit adopts two interleaving main branches to achieve voltage conversion and energy transmission; automatic current sharing of the circuit is realized through the integrated network switch module and PWM signal control; the auxiliary compensation circuit adopts a current mirror image compensation principle, and adjusts the magnitude of the compensation current by comparing the difference between the output current of the main power circuit and the reference current, so as to effectively suppress the output current ripple; the control method comprises the steps of output voltage monitoring, PI adjustment, duty ratio modulation and a complementary control mechanism, current ripple phase offset is ensured, and the system stability and efficiency are improved. Compared with the prior art, the method has the advantages that the complexity of a control system is reduced, the working efficiency is improved, the current ripples are effectively eliminated, and the method has relatively high practical value and popularization prospect.

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 belongs to the field of power electronic power conversion, and provides a coupling type three-level inverter direct current side capacitance current ripple suppression method and system, and the method comprises the steps: determining a coupling type three-level inverter space vector diagram region division method according to a virtual voltage vector duty ratio distribution factor value range; according to the amplitude, the phase angle and the three-phase output current of the reference voltage vector, the sector and the area where the reference voltage vector is located are judged; according to the sector and the area where the reference voltage vector is located, selecting a virtual voltage vector and two basic voltage vectors which are closest to each other, and respectively calculating duty ratios of the virtual voltage vector and the two basic voltage vectors; designing a controller based on a dead-beat control method according to a sector and an area where a reference voltage vector is located, a direct-current side capacitor voltage deviation given value and a direct-current side capacitor voltage deviation actual value, and updating a small vector duty ratio distribution factor to realize independent control of capacitor voltage; and designing a switch sequence based on the updated small vector duty ratio and the sector and the area where the reference voltage vector is located.

The invention provides a low-modulation-ratio topological high-reliability high-voltage direct-hanging energy storage system and method.The system comprises three phases of energy storage unit chains, each phase of energy storage unit chain is formed by cascading a plurality of energy storage units, and the connecting ends of the three phases of energy storage unit chains are sequentially connected with an alternating current side filter inductor in series and then connected with a power grid; the energy storage unit comprises an H-bridge power unit, a bus capacitor, a direct current side filter inductor, a battery side pre-charging device, a direct current side contactor and a battery cluster; the direct current side positive electrode of the H-bridge power unit is sequentially connected with the direct current side contactor, the battery side pre-charging device, the battery cluster and the direct current side filter inductor in series and then is connected with the direct current side negative electrode of the H-bridge power unit, and the alternating current side positive electrode of the H-bridge power unit is sequentially connected in series. According to the invention, the high-voltage direct-hanging energy storage system can fully utilize the DC voltage redundancy to realize the frequency doubling current suppression of the battery cluster by utilizing the low modulation ratio characteristic, and the ripple current pulsation amplitude of the battery meets the national standard requirement under the condition that the device cost is not increased.

The invention provides a DC charging pile metering anomaly detection method, and belongs to the field of charging pile intelligent detection. The method comprises the following steps: acquiring a DC voltage signal, a DC current signal, a voltage ripple signal and a current ripple signal of a DC charging pile in real time; meanwhile, the temperature of a charging pile metering chip is obtained; inputting the data into the constructed and trained DC charging pile metering anomaly detection model, and outputting a state prediction result; the direct-current charging pile metering anomaly detection model is newly designed and comprises a time sequence convolution module, a time sequence enhancement module, a time sequence optimization module and a prediction output module, final anomaly detection is completed through cooperation of the four modules, meanwhile, a dynamic weight optimization strategy is designed to conduct joint training on the constructed modules, and the detection accuracy is improved. And the overall performance of the model is ensured to be optimal. According to the invention, subtle changes and abnormal modes in the measurement data of the DC charging pile can be more accurately captured, the detection precision and efficiency are improved, and the labor cost is saved.

The invention relates to the technical field of capacitor manufacturing and state monitoring, in particular to a capacitor aging curve optimization method based on deep learning, which comprises the following steps: step 1, multi-modal data acquisition and standardization processing; 2, modeling and training a physical constraint neural network; 3, executing a dynamic control and maintenance strategy: dynamically adjusting the switching frequency of the inverter based on a comparison result of the residual life prediction value output in the step 2 and a preset threshold value, and enabling the ripple frequency to deviate from a capacitor impedance sensitive frequency band; and according to the aging mode classification result output in the step 2, triggering a corresponding temperature sampling frequency adjustment or bus voltage reduction operation. Through fusion of multi-modal data, a physically constrained neural network model and a dynamic control strategy based on a prediction result, the aging process of the capacitor is successfully optimized, the use efficiency of the capacitor is improved, and the life cycle of the capacitor is effectively prolonged.

The invention discloses a high-precision power supply output correction method based on a digital pre-distortion technology, and relates to the technical field of power electronics, and the method comprises the steps: integrating an electricity-heat-magnetism real-time combined observer, and inputting parameters including a power supply output voltage, a current, a power device junction temperature, a magnetic element surface temperature, an environment temperature, and an input voltage ripple; using a hierarchical memory depth pre-distortion compensator to generate an anti-phase pre-distortion signal containing long time domain thermal constant compensation and short time domain capacitance energy storage compensation based on modeling engine output; based on a double-ring adaptive updating module, an inner ring updates electrical parameters, including on resistance and dead time, by taking a switching period as a reference, and an outer ring updates thermomagnetic parameters, including thermal resistance and a magnetic core saturation point, in a minute-level period; and the DAC is connected in series with a pre-distortion signal output end through an anti-interference execution channel, and comprises a noise shaping DAC and a driving stage for delay matching. According to the invention, through an electric-thermal-magnetic three-field combined observation architecture, the limitation of traditional single physical field monitoring is broken through.

The invention relates to the technical field of electrical variable measurement, in particular to a ripple test method and system for a high-voltage power supply. The method comprises the following steps: based on detection data, acquiring a ripple wave over-expectation coefficient of a high-voltage power supply and a decomposed ripple wave waveform curve; acquiring a stability coefficient of an environment where the high-voltage power supply is located based on the monitoring data of the load equipment; obtaining a ripple measurement compensation coefficient of the high-voltage power supply based on the ripple over-expectation coefficient of the high-voltage power supply and the stability coefficient of the environment where the high-voltage power supply is located; on the basis of the compensation coefficient and the detection data, a ripple signal curve for compensation identification is obtained; obtaining a high-voltage power supply ripple waveform curve based on the decomposed ripple waveform curve and the compensated and identified ripple signal curve; and based on the ripple waveform curve of the high-voltage power supply, measuring the ripple of the high-voltage power supply to obtain a measurement result. According to the invention, the measurement precision of an existing test method in the process of measuring the ripples of the high-voltage power supply is improved.

The invention discloses a DAB-based two-stage DC-AC converter system, which is composed of a dual-active full-bridge DC-DC converter and a single-phase grid-connected inverter, and is characterized in that the dual-active full-bridge DC-DC converter is formed by connecting a primary side full bridge and a secondary side full bridge through a high-frequency transformer HFL and a resonance circuit composed of Cr and Lr; the single-phase grid-connected inverter comprises an inverter full bridge composed of switch tubes K1-K4 and an LCL type grid-connected filter circuit composed of inductors L1 and L2 and a capacitor C; the invention further discloses a secondary ripple suppression method and a control strategy, the pulse power of double frequency multiplication in the direct-current bus capacitor is transferred to the LC power decoupling branch through the LC passive branch connected to the middle point of the secondary side of the double active bridge, so that power decoupling is achieved, and the secondary ripple suppression in the direct-current bus voltage keeps the bus voltage stable.

The invention discloses a power adapter parameter dynamic optimization method for prolonging the service life of equipment, and relates to the technical field of adapter performance optimization, and the method comprises the steps: monitoring and recording the output voltage, current and power factor parameter changes of a power adapter in real time under static and dynamic load conditions by using a test instrument; identifying the trend and reason of abnormal parameter change; performing thermal design optimization and temperature management on the power adapter; performing over-power and over-current limitation on the pulses one by one; introducing a power factor correction circuit; optimizing the switching frequency and the design of an output filter; a load line adjusting circuit is introduced, and space is reserved for dynamic ripples when output current jumps; and evaluating whether the optimization effect reaches an expected target or not. By introducing the power factor correction circuit and the load line adjustment circuit, the power factor of the power adapter is improved, the harmonic pollution is reduced, the stability of the output voltage of the power adapter is improved, and the performance of the power adapter under the dynamic load condition is improved.

Disclosed embodiments may include High Conversion Ratio Hybrid Switched Capacitor Power Converter, including components for, systems including, and methods for the same. Disclosed embodiments may provide a power conversion circuit and architecture that can achieve high efficiency and high voltage conversion ratio by mixing the operation of a switched capacitor charge distributor and a multiphase DC-DC voltage regulator. The circuits may include a magnetic structure and package that can achieve high performance when providing a high voltage conversion ratio while also offering low output current ripple and a fast dynamic response. The converter can be used, for example, to supply electricity to low voltage high current microprocessors in data centers.

The invention relates to the technical field of servo control, in particular to a high-precision current closed-loop control system and method for a servo driver, and the method comprises the steps: collecting three-phase current, rotor position, winding temperature and bus voltage, and constructing a state data set; constructing a parameter identification model fusing physical prior and an attention mechanism, deducing inductance and flux linkage parameters influenced by temperature, saturation and cross coupling, and correcting a motor model in real time; the correction parameters are injected into an FOC decoupling and feedforward link, and a self-adaptive PI regulator is linked to set the gain of a current loop on line; calculating a d-q axis voltage command according to the update model to respectively control excitation and torque components; an extended state observer is introduced to estimate load abrupt change and parameter disturbance, feed-forward compensation is carried out, and three-phase PWM is generated through anti-Parker and SVPWM; and an inverter nonlinear compensation model of a dead zone and switch delay is constructed, PWM is pre-distorted and output to a power device, and robust and low-ripple current closed-loop control of the servo motor is realized.

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.

The invention discloses an output voltage detection method and system based on an aviation power supply, and relates to the technical field of aviation power supply voltage detection. A differential voltage sensor is connected to the output end of an aviation power supply, a high-frequency suppression capacitor is connected in parallel, the sampling rate of 20-50 times of the working frequency is set according to the type of the power supply, and the signals are collected and converted into analog voltage signals; the analog signal is subjected to two-stage filtering, is amplified to 0-5V through an instrument amplifier, and is converted into a digital voltage sequence through a 16-bit ADC (Analog to Digital Converter); calculating AC power supply effective value, peak value and other parameters, DC power supply average value, ripple coefficient and other parameters; comparing the characteristic parameters with a preset threshold value, determining that the characteristic parameters exceed the threshold value and recording related information; and a detection result is transmitted to a monitoring terminal through an RS485, data is locally stored, and a switching value is output to an alarm device when the data is abnormal. The method adapts to aviation power supply load fluctuation and environment temperature change, detection precision is high, data transmission and storage are safe, abnormity is accurately identified and early warning is carried out in advance, and aviation power supply operation and maintenance reliability and efficiency are improved.

The invention discloses a TCM-mode-based Si-SiC hybrid power multi-phase staggered H-bridge converter structure and a control method thereof, according to the scheme, a three-phase staggered parallel topology of a two-phase low-frequency Si-IGBT bridge arm and a one-phase high-frequency SiC-MOSFET bridge arm is adopted, and a TCM control strategy is combined, so that zero voltage switching (ZVS) of a Si device is successfully realized, the switching loss is remarkably reduced, and the switching efficiency is improved. The system efficiency is greatly improved; and meanwhile, through pilot frequency interleaving and ripple compensation technologies, total output current ripples are greatly reduced, and optimal balance between system performance and manufacturing cost is realized while the power capacity of the converter is remarkably expanded and the dynamic response speed and the output electric energy quality are improved.

The invention discloses a switch control method, a switch control circuit and electronic equipment. The switch control method comprises the following steps: acquiring an output voltage of a voltage conversion circuit; obtaining a first turn-on time by using the output voltage; generating a first control signal by using the first turn-on time; acquiring an accumulated count value from a first period termination moment corresponding to the host conversion circuit at present to a second period termination moment corresponding to the slave conversion circuit; obtaining second turn-on time by using the first turn-on time and the accumulated counting value; generating a second control signal by using the second turn-on time; and the first control signal and the second control signal are respectively sent to a host conversion circuit and a slave conversion circuit so as to respectively trigger the host conversion circuit and the slave conversion circuit to change the on-off state, thereby adjusting the output voltage. Through the above mode, the switch control method can reduce output voltage ripples, reduce the current harmonic distortion rate, and guarantee the stability, reliability and operation efficiency of power supply.