46 results about "Conducted Interference" patented technology

The present invention discloses a method, device, equipment and storage medium for simulating the conducted interference of a converter, in the field of circuit simulation technology. The method comprises: obtaining a converter conducted interference simulation circuit; utilizing a switch control module to obtain and output corresponding control signals to each switch device on each bridge arm in a first converter module; utilizing a rising and falling edge processing module to perform rising edge and falling edge processing on the voltage monitoring signal and the current monitoring signal of each bridge arm in each first converter module, respectively, to obtain a voltage processing signal and a current processing signal; utilizing the voltage processing signal and the current processing signal as excitations for the voltage source and the current source on each bridge arm in a second converter module, utilizing a high-frequency circuit to obtain simulation results corresponding to a load control instruction; the present invention establishes an ideal circuit and a high-frequency circuit respectively in the same simulation circuit, thereby solving the problem of incompatibility between the high-frequency circuit and the low-frequency circuit, and realizing high-precision simulation of the conducted interference of the converter.

The application discloses a kind of digital control circuit board anti-interference filter design methods under group pulse action, realize the accurate modeling of EFT noise to digital control circuit conduction interference coupling, and based on conduction interference coupling circuit model and failure threshold, the quantitative design of anti-interference filter is carried out.Compared with traditional method, the application provides a kind of method for establishing chip black box impedance model based on online test and vector matching method, solves the impedance model modeling problem of chip under no internal structure data, and establishes the conduction interference coupling model of digital control circuit under EFT noise, provides model basis for quantitative design;From the angle of quantitative design, the anti-interference filter design method of the application effectively improves the anti-interference level of digital control circuit.

The invention relates to the technical field of fire detection, and discloses a multi-sensor pyrolysis particle fire detection control system and device, and the system comprises a power supply and signal coupling module, a dielectrophoresis modulation detection cavity module, a multi-dimensional environment sensing module, a central processing unit and an execution module. The power supply and signal coupling module extracts a high-frequency conducted interference signal of a power supply circuit and generates a high-voltage driving signal and a reference signal respectively; the dielectrophoresis modulation detection cavity module is used for establishing a non-uniform electric field by utilizing a high-voltage driving signal and carrying out dielectrophoresis modulation on aerosol particles passing through a detection area; the central processing unit synchronously collects the photoelectric detection signal and the reference signal, and determines the fire state by calculating a cross correlation coefficient. The device integrates the modules in a shell. According to the invention, physical and signal correlation between power supply noise and particle concentration change is established, electrical fire pyrolysis particles and environmental dust are effectively distinguished, and high-sensitivity early detection of electrical fire is realized.

This invention discloses a near-field scanning detection method based on active learning to obtain conducted coupling paths. The method includes: constructing a near-field scanning detection platform; placing the circuit board under test (PCB) in a microwave anechoic chamber; and using the near-field scanning detection platform directly above the PCB to perform detection; obtaining the detection results using an active learning-based near-field scanning method; and obtaining a near-field current distribution map on the PCB at continuous time intervals based on the detection results, thereby realizing the detection of conducted coupling paths. This invention utilizes active machine learning methods to achieve more efficient near-field scanning detection, concentrating scanning points in areas with strong currents and accurately reconstructing the actual current changes of the PCB using the scan results of sparse points, greatly improving detection efficiency. By using near-field scanning detection to reconstruct the current changes on the circuit board, the coupling paths of conducted interference currents on the PCB can be quickly analyzed, meeting the requirements for detecting electromagnetic interference in systems in practical engineering.

A lightning protection device of a tethered balloon communication system, comprising: a lightning protection net, a shielding layer, a protection circuit; the lightning protection net wraps the tethered balloon; the shielding layer is installed outside the communication module and the communication line of the tethered balloon and is connected with the lightning protection net; the protection circuit is connected inside the communication module and is used for protecting common mode and differential mode interference caused by lightning; the lightning protection net arranged outside the tethered balloon, the shielding layer and the protection circuit arranged inside the communication module are designed according to the characteristics of the communication system in the tethered balloon, the communication module and the communication line are treated in all directions, the damage caused by lightning to the communication module of the tethered balloon and the radiation and conduction interference in the lightning process are effectively reduced, the normal work of the communication module in the lightning process is ensured, and the accuracy and reliability of data transmission are ensured.

The invention belongs to the technical field of charging piles, and particularly relates to a power-frequency small-current leakage protection low-frequency conducted interference resistance detection system and method. The system comprises a random phase-shift frequency-conversion oscillation module for converting low-frequency conducted interference of 10kHz-150kHz into an unstable equivalent low-frequency signal by introducing random delay to control the charging overturning time of a magnetic core; the dot frequency comb filtering module is used for filtering the current signals of a plurality of preset power frequency harmonic frequency points and outputting a maximum effective value; and the power frequency current judgment module is used for judging whether the effective value continuously exceeds a threshold value (such as 5mA) and reaches stable time (such as 50ms) so as to distinguish real electric leakage and interference. The method is realized based on the system. The core advantages of the invention lie in that misoperation caused by low-frequency conducted interference can be effectively avoided, the reliability of high-sensitivity (5mA) electric leakage protection in a complex electromagnetic environment (such as electric vehicle charging) is significantly improved, and the strict safety standard requirements such as UL2231 and the like are met.

The present application relates to the technical field of aircraft testing, and discloses a radiation and conduction overlapping frequency band HIRF comprehensive sensitivity test device and a test method, the device comprising a reverberation chamber and a test control system, a grounding panel and a support seat are arranged in the reverberation chamber, the support seat is arranged on the grounding panel, a device under test is placed on the upper surface of the support seat, a stirrer is arranged at a corner of the reverberation chamber, and the test control system is in bidirectional communication with a signal generation and processing system, an adaptive delay compensation system, a radiation test system, a conduction test system, an optoelectronic conversion system and a measurement receiver. The present application aligns the arrival time of a radiation field and conduction interference at the device under test through the adaptive delay compensation system, reproduces the electromagnetic energy synchronous coupling effect in the HIRF environment, combines field strength closed-loop control and conduction current monitoring feedback, synchronously applies a radiation field strength and wire bundle injection current that meet standard levels, and realizes verification of the coupling mechanism of radiation-conduction comprehensive sensitivity.

The application discloses an electromagnetic compatibility quantitative evaluation method based on a conduction emission model, which can realize electromagnetic interference simulation prediction on the power line conduction emission result measured by equipment, evaluate the conduction interference coupling response of electromagnetic emission of the equipment, and is suitable for guiding the equipment to perform electromagnetic compatibility examination and evaluation in engineering. The application takes the power line conduction emission spectrum test data of the equipment as the input of an evaluation model, then calculates the conduction coupling response value of the power line conduction emission of the equipment at the general electrical equipment end, and evaluates and analyzes the power line conduction emission result of the equipment according to the response value, so as to guide the equipment to perform electromagnetic compatibility examination and evaluation in engineering.

The invention discloses a rapid assessment method for radio frequency conducted interference of a power supply module. The method comprises the following steps: carrying out induction and classification on the power supply module from the aspects of function application and size, and then judging the weights of differential mode interference and common mode interference in radio frequency conducted interference of the power supply module through an analytic hierarchy process; influence factors influencing radio frequency conducted interference of the power module are concluded and classified by using an electromagnetic topological structure according to an analytic hierarchy process; carrying out weight analysis on the related influence factors according to an index weight ANP algorithm; performing prediction calculation on conducted interference under each influence factor through a rapid evaluation method; and calculating the radio frequency conducted interference of the power supply module under the condition of multiple influence factors by analyzing the distributed weight. Through the conducted interference under the multi-factor coupling characteristic of the power supply module, the rapid evaluation of the conducted interference of the power supply module is realized.

This application relates to a high-frequency carrier electromagnetic protection system, method, and electronic device for power energy storage. The system includes: a high-frequency carrier detection module for acquiring high-frequency carrier digital signals; an interference suppression control module that uses an interference signal identification algorithm to obtain the interference type and intensity level of the interference signal, and uses a filtering parameter optimization algorithm to obtain the optimal filtering parameters based on the interference type and intensity level, and obtains a shielding status monitoring command through a shielding status linkage algorithm; an adaptive filtering module that controls the on / off or combination of capacitor arrays and inductor arrays according to the optimal filtering parameters to filter out conducted interference signals; and a multi-layer shielding module that responds to the shielding status monitoring command to filter out radiated interference signals. This solves the problems of insufficient protection targeting, single protection level, and poor compatibility in electromagnetic protection technologies, achieving precise and efficient protection against high-frequency carrier electromagnetic interference, while ensuring the operating efficiency and stability of the power energy storage system.

The invention discloses an anti-interference isolation circuit of an elevator interphone. An input terminal CN1; the normal phase end of the operational amplifier unit U22 is respectively connected with one end of the input terminal CN1 and an input voltage through a resistor R27 and a capacitor C26 in sequence, and the reverse phase end of the operational amplifier unit U22 is connected with the other end of the input terminal CN1 through a resistor R32 and a capacitor C28 in sequence; the positive phase end of the operational amplifier unit U18 is connected with the output end of the operational amplifier unit U22 through a resistor R28 and a capacitor C27 in sequence, the negative phase end of the operational amplifier unit U18 is connected with the output end, and the output end is further connected with the positive electrode of the light emitting end of the optocoupler U19; the negative electrode of the light-emitting end of the optocoupler U19 is grounded, the collector of the optocoupler U19 receives a voltage, the emitter of the optocoupler U19 is grounded through a resistor R103, the emitter of the optocoupler U19 is further connected with other peripherals, and electromagnetic interference and conducted interference generated in the elevator strong current environment are thoroughly blocked from two fundamental paths of power supply and signal transmission through the dual design of power isolation and signal isolation. And complete isolation of strong current and weak current is realized.

The application provides a common-mode interference modeling and analysis method for an SLLC resonant converter, and belongs to the technical field of power electronics and electromagnetic compatibility; by extracting key parasitic parameters of a circuit, combining a transmission line theory and an equivalent circuit modeling technology, constructing a high-precision common-mode interference propagation path model, and introducing complex high-frequency line parasitic parameters, the application describes the propagation characteristics of common-mode currents; aiming at the calculation complexity problem caused by high-dimension modeling, the application proposes a model simplification strategy, effectively reduces the calculation complexity while ensuring the analysis accuracy through equivalent transformation and frequency domain order reduction processing; the application has the advantages of high precision, high efficiency, strong universality and the like, and is suitable for common-mode interference modeling analysis and electromagnetic compatibility design of the SLLC resonant converter and other various high-frequency power electronic devices.

The invention discloses an active suppression method for conducted interference of a charging module cluster and a related device, which are used for enabling the charging module cluster to still effectively suppress conducted interference in a high-power parallel operation scene and maintaining the output stability and reliability of a system. The method comprises the following steps: acquiring operation parameters of a plurality of charging modules working in parallel; establishing a switching noise contribution model reflecting the influence degree of each charging module on cluster conducted interference based on the operation parameters; analyzing the switching transient states of the plurality of charging modules under the current working condition by using the switching noise contribution model, and calculating the spectrum superposition relationship of the plurality of charging modules under the current working condition; determining a target relative time sequence relation according to the spectrum superposition relation; and issuing a switch parameter adjustment instruction to the plurality of charging modules according to the target relative time sequence relationship, and performing synchronous calibration on the switch control time sequence in the plurality of charging modules, so that the plurality of charging modules execute switch actions according to the calibrated relative time sequence.

The invention discloses a variable-frequency oscillation anti-interference system and an interference signal acquisition method, and belongs to the technical field of charging piles. The system comprises a fluxgate current acquisition module, an edge jump catcher unit, an upward counter unit, a random number generator unit, a data comparator unit, a high-low level state latch unit, an arithmetic unit, a digital-to-analog conversion unit and a low-pass filter circuit. Time delay controlled by a random number is introduced in the switching process of forward and reverse charging of the magnetic core, so that the sampling phase of the system is randomized, and the fixed harmonic relation between the sampling frequency and an interference signal of a specific frequency band is broken, and therefore, low-frequency conducted interference of the frequency band of 15kHz-150kHz is effectively inhibited, and misoperation caused by the fact that the low-frequency conducted interference is misjudged as a direct-current leakage signal is avoided. According to the invention, the accuracy and reliability of residual current detection in high-interference environments such as automobile charging piles and photovoltaic power generation are obviously improved.

This invention provides a method, apparatus, receiver, medium, and system for conducting interference testing of inverters, relating to the field of equipment testing technology. The method includes: for any test condition among all test conditions, controlling a first LISN to perform phase adjustment, and performing conducted interference testing on the device under test based on the phase-adjusted first LISN; after all phase tests corresponding to the first LISN are completed and without power interruption, controlling a second LISN to perform phase adjustment, and performing conducted interference testing on the device under test based on the phase-adjusted second LISN; the first LISN may be an AC LISN or a DC LISN, and the second LISN may be an AC LISN or a DC LISN, wherein the first LISN and the second LISN are of different types. This invention can significantly reduce test time, thereby improving the overall test efficiency of conducted interference testing.

The invention discloses a wireless communication anti-interference method, system and device and a storage medium, and relates to the technical field of wireless communication. The method comprises the steps that the wireless communication anti-interference method is applied to a wireless communication system, the wireless communication system comprises a hardware layer and a software layer, index data of the hardware layer are obtained, and interference information is obtained by conducting interference identification on the index data of the hardware layer through the software layer; and adjusting parameters of the hardware layer according to the interference information. The software layer performs interference identification based on the index data of the hardware layer, determines interference information, and then directly adjusts parameters of the hardware layer according to the interference information; through cooperative work of the hardware layer and the software layer and direct adjustment of parameters of the hardware layer, the anti-interference capability and the transmission rate of the wireless communication system are improved, so that the wireless communication system can correctly receive and transmit data.

The invention provides a common-mode interference modeling and analysis method for an SLLC resonant converter, and belongs to the technical field of power electronics and electromagnetic compatibility. According to the method, a high-precision common-mode interference propagation path model is constructed by extracting key parasitic parameters of a circuit and combining a transmission line theory and an equivalent circuit modeling technology, and complex high-frequency line parasitic parameters are introduced to describe propagation characteristics of common-mode current; a model simplification strategy is provided for the problem of calculation complexity caused by high-dimensional modeling, and the analysis precision is ensured while the calculation complexity is effectively reduced through equivalent transformation and frequency domain order reduction processing; the method has the advantages of high precision, high efficiency, high universality and the like, and is suitable for common-mode interference modeling analysis and electromagnetic compatibility design of the SLLC resonant converter and other various high-frequency power electronic devices.

The invention discloses a risk prediction method for high-voltage conducted emission electromagnetic interference of an electric drive system, and the method comprises the steps: injecting a double-pulse drive signal, and synchronously collecting the switching voltage waveform of an upper bridge switching tube and a lower bridge switching tube and the waveform of switching current flowing through an inductor through an oscilloscope; performing fast Fourier transform, and extracting conducted interference spectrum data; obtaining the comprehensive insertion loss of the filter to be evaluated, testing a conduction voltage method noise value, then retesting the conduction voltage method noise value, and calculating the comprehensive insertion loss; subtracting the obtained comprehensive insertion loss of the filter from the obtained conducted interference spectrum data, and outputting a conducted voltage method evaluation result; and comparing the output evaluation result with a target limit value standard, and if the evaluation result is lower than a limit value, determining that there is no EMC risk. According to the method, accurate EMC risk assessment is finally obtained through measurement analysis and calculation, the defects of other methods are overcome, the assessment result is more accurate, and the practicability is higher.

The invention provides a chip electromagnetic compatibility automatic test method and a conducted radiation interference test platform. The method comprises the following steps: receiving a test parameter set configured by a user by using a first graphical user interface; the test parameter set comprises configuration parameters for a radiated interference test and / or a conducted interference test of the tested chip; positioning and identifying interaction elements in a second graphical user interface provided by test instrument control software of the operation instrument control end based on an image identification technology; a simulation user operation instruction is generated and executed, and test instrument control software is controlled to automatically complete test parameter setting and start a radiated interference test and / or a conducted interference test; and after the test is completed, obtaining test data output by the test instrument control software, and generating an electromagnetic compatibility test result report for the tested chip. According to the invention, the problems of separation of radiation and conduction test equipment, tedious operation, lack of integrated automatic management and control and the like in an existing chip electromagnetic compatibility test can be effectively solved.

The invention provides a hot-line work robot arc discharge transient current test system and method and a medium. The system comprises a high-voltage wire, wherein a high-voltage test module is connected with the high-voltage wire; the liftable insulating platform is arranged right below the high-voltage wire; the current measurement module is arranged on the liftable insulating platform and is isolated from the ground to form a floating ground measurement structure. According to the invention, the whole current measurement module is electrically isolated from the ground to form a floating ground measurement structure, so that the potential reference of the measurement system and the potential of a discharge point float synchronously, and the conduction interference path of a ground loop is fundamentally cut off; the current measurement module is configured to adopt a differential measurement mode to actively identify and counteract common-mode radiation interference components, so that the signal-to-noise ratio and the measurement precision of a signal in a strong electromagnetic disturbance environment are greatly improved; the floating ground technology and the differential technology are organically combined to form a complete anti-interference system aiming at conducted interference and radiated interference.

The invention provides a 224G high-speed transmission cable for AI data transmission and a manufacturing method of the 224G high-speed transmission cable, and belongs to intelligent power grids, in particular to the technical field of cables.The 224G high-speed transmission cable comprises two sets of center single bodies distributed in a central symmetry mode, a shielding supporting piece, filler, a powder layer, a shielding layer and a protective layer, and the shielding supporting piece is arranged between the two sets of center single bodies; at least one conductor piece is arranged in each group of central single bodies, and tail pins are fixedly arranged on the opposite sides of the two groups of central single bodies. According to the 224G high-speed transmission cable, the two sets of center single bodies are designed to serve as core parts of the 224G high-speed transmission cable, the shielding supporting piece is arranged between the two sets of center single bodies, one of the shielding supporting pieces is used for conducting interference shielding on the two sets of center single bodies, and the other shielding supporting piece is used for supporting an integrated structure formed by the two sets of center single bodies and the shielding supporting piece. Therefore, the shielding supporting piece has enough supporting force along the length direction of the shielding supporting piece and is used for resisting external physical acting force in actual use, and the stability of the 224G high-speed transmission cable in use is ensured.

The utility model relates to a wireless charger for quickly charging a watch. According to the quick-charging wireless charger for the watch, the radiation absorption device is arranged between the transmitting circuit and the receiving coil, and the radiation absorption device generates a negative magnetic field according to an induced parasitic magnetic field to offset the parasitic magnetic field, so that the radiation interference of EMC (Electro Magnetic Compatibility) is reduced; meanwhile, the low-frequency MOS tube is adopted to build the full-bridge switching circuit, the two ends of the transmitting coil are electrically connected with the common-mode inductors, and then the two ends of the transmitting coil are electrically connected with the capacitive filters, so that the wireless charging module adopting the low-frequency MOS tube transmitting circuit can prevent radiation interference and suppress conducted interference. Therefore, on the basis of meeting the working frequency requirement of the charging standard Qi2 and meeting the EMC requirement, the circuit setting cost is greatly reduced, and the quick charging experience requirement of a user is met.

The invention discloses an electromagnetic environment detection system and method for a blade server. The electromagnetic environment detection system comprises a conducted interference monitoring board integrated in the server. The conducted interference monitoring board comprises an interference extraction unit, a single-chip microcomputer and a state indicating lamp. The input end of the interference extraction unit is connected with a live wire and a zero wire of a power supply filter in a server case, and extracts an electric signal representing conducted interference intensity from a power supply line; the single chip microcomputer performs digital signal processing on the electric signal, compares an obtained interference comprehensive value with a preset threshold value, and judges the state grade of electromagnetic interference; the state indicating lamp is connected with a GPIO port of the single-chip microcomputer and indicates corresponding interference states in different flicker modes. Real-time monitoring, intelligent evaluation and graded early warning of conducted interference of a power supply line are achieved, passive post-restart emergency processing is converted into active pre-interference protection, and stable operation of a blade server and continuous execution of key tasks under the maneuvering deployment condition are effectively guaranteed.

The utility model relates to the technical field of server signal coupling conduction, in particular to a detection device for preventing server signal coupling conduction interference, which comprises a shielding shell. The device further comprises a mounting base, the mounting base is fixedly connected into the shielding shell, a first driving motor is fixedly connected to the shielding shell, the output end of the first driving motor is fixedly connected with a first driving rotating shaft, the first driving motor is used for driving the first driving rotating shaft to rotate, and the first driving rotating shaft is rotationally connected to the shielding shell. The other end of the first driving rotating shaft is fixedly connected with a worm; according to the utility model, the server body is subjected to omnibearing detection through a plurality of driving pieces and detectors, high-frequency transient noise, low-frequency ground loop interference and radio-frequency signals coupled by a cable bundle can be captured at the same time, the situation that a traditional device has a detection blind area is avoided, a hidden interference source is found in advance, the system safety is enhanced, and the service life of the server is prolonged. The interference source can be quickly positioned, the troubleshooting time is shortened, and the method has both technical perspectiveness and economical efficiency.

This invention relates to a high-temperature, high-pressure micro-combustion device and method for single-particle fuel. The invention comprises a heat-insulating cavity between the combustion chamber body, the heat-insulating shell, and the heat-insulating top plate, sealed with an optical glass window on both sides of the combustion chamber in the middle of the combustion chamber body. An air inlet and an air outlet for the combustion chamber are located within the combustion chamber body. A glass gasket is nested in the middle of the combustion chamber body, and a micro-combustion plate is placed on the glass gasket. A ring-shaped cast copper heating plate surrounds the combustion chamber on the outer side opposite the glass gasket. A high-speed camera, a high-magnification objective lens, and a background light source are located outside the optical glass window. A laser emitted from a laser enters the high-temperature, high-pressure combustion chamber perpendicularly. This invention can more efficiently and easily meet the requirements of high-temperature, high-pressure micro-combustion experiments under a microscope. It is simple to manufacture, highly stable, heat-insulating, and can flexibly address imaging problems in microparticle ignition and combustion experiments, effectively conducting interference-free testing of single-particle micro-combustion under high-temperature, high-pressure conditions.

The application discloses a wideband impedance modeling method for an extra-high voltage converter valve hall, and the method comprises the following steps: establishing an IGBT wideband impedance model based on the physical structure of an insulated gate bipolar transistor (IGBT) and the frequency response characteristics in the off state; testing the IGBT wideband impedance, identifying and optimizing the model parameters; establishing an MMC sub-module equivalent impedance model according to the current path and the conduction characteristics of the switching devices in different working states of the MMC sub-module; combining the MMC topological structure, the bridge arm reactor, the sub-module capacitor and the internal module connection relationship of the valve hall to construct a wideband impedance equivalent model which is expanded layer by layer from the device level, the sub-module level, the bridge arm level to the valve hall level; and analyzing the wideband conduction interference characteristics of the valve hall. The application can accurately represent the impedance characteristics and the electromagnetic interference propagation law of the extra-high voltage converter valve hall in a wideband range, and provides a model basis for the electromagnetic compatibility analysis of the valve hall, the insulation coordination design, the transient characteristic research and the optimization of the suppression measures.

The invention relates to the technical field of electromagnetic compatibility test and optimization, and discloses a shielding case performance data processing method based on electrical index perception. The method comprises the steps that after a shielding cover is deployed, an electric index data set of the shielding cover in a preset electromagnetic environment is collected, and conducted emission, radiation intensity, electrostatic discharge tolerance, surge immunity and harmonic current parameters are covered; performing multi-dimensional compatibility reconstruction processing on the data set to generate a performance characteristic spectrum including a conducted interference spectrum, radiation interference field distribution, electrostatic discharge sensitivity, a surge sensitive channel and harmonic distortion; calling a pre-constructed performance evaluation model to carry out full-band conformity analysis on the performance characteristic spectrum, and generating a performance standard criterion and a weak band identifier; and generating a performance optimization strategy set including structure enhancement, material adaptation and grounding optimization based on the weak frequency band identifier. According to the method, multi-dimensional comprehensive evaluation of the performance of the shielding case and intelligent positioning of weak links are realized, and targeted optimization is directly guided.

The invention relates to a chip internal conducted interference coupling path testing method and system and computer equipment. The method comprises the following steps: electrifying a to-be-tested chip placed in the infrared phase-locked thermal imaging equipment, and controlling the to-be-tested chip to enter a preset working mode; performing signal synchronization on the voltage excitation signal output by the infrared phase-locked thermal imaging equipment and the electromagnetic interference signal, injecting the synchronized interference signal into the to-be-tested chip, and obtaining an infrared phase-locked hot spot distribution diagram of the to-be-tested chip in a preset working mode through the infrared phase-locked thermal imaging equipment; according to the infrared phase-locked hot spot distribution diagram, internal interference test results of the chip to be tested in the preset working mode are determined, and the internal interference test results comprise a coupling path test result and a sensitive unit test result. And high-precision and visual positioning and analysis of a conducted interference coupling path in the chip and a chip sensitive unit can be realized.

The invention discloses an SWPDT system interference suppression method based on balanced impedance, an SWPDT system comprises a primary side circuit and a secondary side circuit, and the primary side circuit comprises a direct current power supply, a direct current bus capacitor, a full bridge inverter, a primary side LCC compensation network, a transmitting coil with a tap and a signal transmitting circuit; the secondary circuit comprises a receiving coil with a tap, a secondary LCC compensation network, a signal receiving circuit, a full-bridge rectifier and a load; the method comprises the following steps of: equally dividing a compensation inductor, a series compensation capacitor and a parallel compensation capacitor in a primary side LCC compensation network and a secondary side LCC compensation network into two same parameter elements respectively; and connecting the two equally divided elements with the same parameter to the corresponding branches to form balanced impedance. According to the invention, differential-mode and common-mode conducted interference can be suppressed, and the anti-interference capability of the whole electromagnetic interference of the system can be improved.

The invention relates to the technical field of aircraft testing, and discloses a radiation and conduction overlapped frequency band HIRF comprehensive sensitivity test device and method, the device comprises a reverberation chamber and a test control system, a grounding flat plate and a supporting seat are arranged in the reverberation chamber, the supporting seat is arranged on the grounding flat plate, a tested device is placed on the upper surface of the supporting seat, and the testing control system is connected with the testing control system. The stirrer is arranged at one corner of the reverberation chamber, and the test control system is in two-way communication with the signal generation and processing system, the self-adaptive delay compensation system, the radiation test system, the conduction test system, the photoelectric conversion system and the measurement receiver. Through an adaptive delay compensation system, arrival time of a radiation field and conducted interference at a tested device is aligned, an electromagnetic energy synchronous coupling effect in an HIRF environment is reproduced, field intensity closed-loop control and conducted current monitoring feedback are combined, radiation field intensity and wire harness injection current which meet a standard level are synchronously applied, and the electromagnetic energy synchronous coupling effect in the HIRF environment is achieved. And radiation-conduction comprehensive sensitivity coupling mechanism verification is realized.