76results about How to "Improve electromagnetic compatibility" patented technology

The invention discloses a high-efficiency converter for adjusting the voltage of a power grid, and belongs to the technical field of power electronics. The converter comprises a first voltage regulation circuit, a second voltage regulation circuit, a filter circuit, a detection circuit and a control circuit. By detecting the amplitude difference between the power grid voltage and the load voltage, the control circuit automatically switches the Buck working mode or the Boost working mode, and stable alternating current output in a wide input voltage range is achieved. The invention has the advantages of compact structure, high efficiency, fast response, small harmonic wave and the like, and is suitable for industrial and civil occasions with large-range fluctuation and frequent power grid voltage.

The invention relates to the technical field of motor control, in particular to a brushless motor electronic speed regulation circuit for an unmanned aerial vehicle and a control method of the brushless motor electronic speed regulation circuit. The brushless motor electronic speed regulation circuit comprises a printed circuit board, a power supply module and a grid driving module. The printed circuit board is provided with a plurality of wiring layers which are stacked, and comprises a first power supply layer and a second power supply layer which are adjacent to each other in the vertical direction and are overlapped and aligned, and an electrical control layer. The power supply module is arranged on the first power supply layer and the second power supply layer, the first power supply layer and the second power supply layer are electrically connected through a matrix via hole array, and the power supply module is used for being electrically connected with an external power supply and supplying power to a circuit after processing. The grid driving module is arranged on the electrical control layer, is powered by the power supply module and is used for outputting driving voltage to the brushless motor, large current transmission and balanced distribution of the multi-channel motor controller can be realized on a single printed circuit board, and electromagnetic interference of a power loop on a control signal is inhibited.

The utility model discloses a new energy automobile copper clad aluminum braided shield high voltage cable in the technical field of high voltage cable, including stranded copper conductor, the fixed extrusion of insulating layer has on the outer wall of stranded copper conductor, the insulating layer is cross -linked polyethylene or cross -linked polyolefin insulating layer, the insulating layer outside fixedly set semiconductive inner layer, fill in the PP filling strip between semiconductive inner layer with insulating layer, the outer wall of semiconductive layer extrudes and has copper clad aluminum braided shield layer, copper clad aluminum braided shield layer is 0.1~0.2 tinned copper clad aluminum wire, and with semiconductive inner layer is 360 degree ring pressure contact, the outer wall of copper clad aluminum braided shield layer fixed extrusion has aluminum foil layer, the outer wall of aluminum foil layer fixed extrusion has semiconductive outer layer, the outer wall of semiconductive outer layer fixed extrusion has cross -linked polyolefin sheath, the utility model discloses can reduce the shielding layer direct current resistance, guarantees the continuity of grounding, promotes high -frequency shielding efficiency, strengthens in 100kHz~30MHz frequency band shielding attenuation.

The invention discloses an LVDS (Low Voltage Differential Signaling) receiving circuit with a wide common-mode input range. The LVDS receiving circuit comprises a common-mode conversion circuit, a main comparator circuit, a secondary comparison circuit and a logical judgment circuit, the common-mode conversion circuit is used for converting an external wide common-mode input differential signal into a signal with constant common-mode voltage and no attenuation of the differential signal; the main comparator circuit identifies the converted differential signal to complete differential-to-single-ended data conversion; the secondary comparator circuit is composed of two low-speed comparators; and the logic judgment circuit judges the output of the main comparator and the window comparator to ensure that the output of the input end of the circuit group is a constant level under the short circuit and disconnection conditions, so that the function of dynamic failure protection of the circuit is realized. The wide common-mode input circuit can realize discrimination of wide common-mode input signals ranging from-4V to 5V, and has a dynamic failure protection function.

An electronic cigarette radio frequency source device comprises a radio frequency function board and a shielding isolation frame fixedly connected to the radio frequency function board. The system function board is fixedly connected to the shielding isolation frame and located on the side, away from the radio frequency function board, of the shielding isolation frame; wherein an accommodating space is formed among the radio frequency function board, the shielding isolation frame and the system function board, a shielding partition plate group is integrally formed on the shielding isolation frame, and the accommodating space is divided by the shielding partition plate group. The accommodating space is divided by the shielding partition plate group, and the accommodating space in the device is divided into a plurality of areas, so that the areas in the accommodating space can effectively avoid mutual electromagnetic interference. The design that the radio frequency function board is located on the side, away from the system function board, of the shielding isolation frame, the containing space is formed among the radio frequency function board, the shielding isolation frame and the system function board, and radio frequency radiation is sealed in the containing space is adopted, so that the electromagnetic compatibility between a circuit on the radio frequency function board and a circuit on the system function board is improved.

The utility model discloses an LLC magnetic integrated transformer, and aims to improve the integration level, the performance and the reliability. The transformer comprises a winding support, an upper magnetic core and a lower magnetic core which are symmetrically arranged, and a placing magnetic core fixed in a through hole of the winding support. The through hole is divided into a first containing groove and a second containing groove, the magnetic core is placed in the first containing groove, and the side edge protruding columns of the upper magnetic core and the lower magnetic core are arranged in the second containing groove. And a first air gap and a second air gap are respectively arranged between the magnetic core and the side edge convex columns and between the side edge convex columns and are used for adjusting magnetic resistance and optimizing performance.

The utility model discloses a printed circuit board, a communication device and a vehicle. The printed circuit board comprises a dielectric related interface, an electrostatic impedor, a common-mode resistor, an alternating-current coupling capacitor, a common-mode filter and a control chip, and a differential signal line is connected to the control chip through the electrostatic impedor, the common-mode resistor, the alternating-current coupling capacitor and the common-mode filter in sequence; wherein the differential signal lines are arranged based on a cross-layer reference mode; wiring of the positive signal line and the negative signal line of the differential signal line, pin bonding pads on wiring paths and via holes in the wiring paths are all symmetrically arranged, and the positive signal line and the negative signal line are matched in equal length. Through the symmetrical arrangement and equal-length matching of the differential signal lines and the use of the electrostatic impedor, the common-mode resistor, the alternating-current coupling capacitor, the common-mode filter and other elements, noise and interference are effectively suppressed, and the integrity of signals is improved. The cross-layer reference and the reasonable wiring strategy help to reduce electromagnetic radiation and sensitivity, and improve the electromagnetic compatibility of the printed circuit board.

The embodiment of the invention provides a control method of a voltage converter and an energy storage system. The method comprises the following steps: a controller obtains accumulated required power of any control period; the controller judges whether the accumulated required power is greater than or equal to a set sending power threshold value; if the controller judges that the accumulated required power is greater than or equal to a sending power threshold value, the controller sets the output power as the accumulated required power; if the controller judges that the accumulated required power is smaller than the sending power threshold value, the controller sets the output power as a set value, and the set value is smaller than the sending power threshold value; the controller controls whether the voltage converter works or not according to the output power. According to the embodiment of the invention, the stability of power supply is improved, and the electronic equipment connected to the energy storage inverter is protected; generation of electromagnetic interference is reduced, and electromagnetic compatibility of the system is improved.

The present application relates to a kind of sCMOS image sensor multi-species signal cross vacuum integration transmission method, comprising: preparation four-layer high-speed vacuum compression flexible circuit board, it includes control signal layer, power loop layer, segmented power layer, high-speed LVDS image data transmission layer from top to bottom;A slit is opened on the bottom disc of vacuum closed cavity, and the middle section of four-layer high-speed vacuum compression flexible circuit board is sealed between the slit and the slit and is penetrated;sCMOS image sensor is connected with the front section of four-layer high-speed vacuum compression flexible circuit board;High-speed high-density rectangular connector is connected with the rear section of four-layer high-speed vacuum compression flexible circuit board;The upper cover of vacuum closed cavity is fixed and sealed with the bottom disc under vacuum condition.This application can ensure the long-term reliability of vacuum cavity, reduce the number of potential leakage points, while having small volume, high space utilization, multi-signal high-quality transmission, simple structure, high reliability, low maintenance and upgrading cost and other advantages.

The utility model discloses a Hall sensor circuit for cabinet door state detection, and belongs to the field of sensor circuits. Comprising a Hall sensor module, a filtering module, a voltage protection module, a current limiting module, a state indication module and a signal output interface module. The Hall sensor module is used for sensing a magnetic field signal generated by the position change of the cabinet door and outputting a corresponding level signal; the filtering module is composed of a pi-type filtering circuit composed of a capacitor and an inductor and is used for suppressing high-frequency interference of a power supply and improving power supply stability. The voltage protection module adopts a transient voltage suppression diode to realize input surge suppression; the current limiting module is composed of a plurality of resistors and is used for limiting output current and realizing signal level voltage division conditioning; the state indication module indicates the state of the cabinet door in real time through a light-emitting diode; and the signal output interface module is used for transmitting the processed signal to a control system. The circuit has the advantages of simple structure, strong anti-interference capability, high adaptability and good detection reliability.

This application relates to a keyboard protector and an electronic device. The electronic device includes a cavity antenna, a frame, and a screen. The frame includes a radiating segment facing the opening of the cavity antenna, and a radiating gap is formed between the radiating segment and the screen. The keyboard protector includes a housing and a metal keyboard. The inner side of the housing is used to connect the electronic device. The metal keyboard includes a keyboard surface and a placement surface disposed opposite each other. The metal keyboard includes an antenna window extending from the placement surface to the keyboard surface. When the keyboard protector and the electronic device are assembled and the keyboard protector is in a closed state, at least a portion of the projected area of ​​the radiating gap is located within the antenna window. The design of the keyboard protector in this application allows the antenna signal to radiate outward through the antenna window, effectively avoiding interference from the metal keyboard to the cavity antenna signal, ensuring the radiation efficiency of the antenna signal, improving the user experience, and enhancing the electromagnetic compatibility of the device.

The utility model relates to the field of dimming drive circuits, and particularly discloses an LED analog-digital hybrid dimming drive circuit, which comprises an MCU controller and a dimming drive chip, the low-side output end of the dimming drive chip is electrically connected with a power switch element, the power switch element is electrically connected with the negative electrode of an LED lamp through an inductance element, and the power switch element is electrically connected with the negative electrode of the LED lamp through the inductance element. The PWM output end of the MCU controller outputs digital signals to the PWM input end of the dimming driving chip, a digital-to-analog conversion integrating circuit is arranged between the IO output end of the MCU controller and the ADJ input end of the dimming driving chip, and the IO output end of the MCU controller outputs digital signals to the digital-to-analog conversion integrating circuit. The digital-to-analog conversion integrating circuit converts the digital signal into an analog signal and transmits the analog signal to the ADJ input end of the dimming driving chip.

The utility model relates to the cable field, and especially relates to a multichannel isolation shielding cable comprising a cable core, a composite shielding layer, a filling layer and a protection layer, the composite shielding layer wraps the cable core, and the filling layer is filled between the composite shielding layer and the protection layer; the composite shielding layer comprises an inner shielding layer, an insulating layer and a shielding tape layer, the inner shielding layer wraps the outer side of the cable core, the insulating layer wraps the outer side of the inner shielding layer, the shielding tape layer wraps the insulating layer, and a bonding layer is arranged on the side, making contact with the insulating layer, of the shielding tape layer. According to the utility model, near-field coupling and frequency band cross interference among the wire cores can be effectively reduced, and the anti-interference capability of the cable is significantly improved.

The utility model discloses a high tensile steel-cored aluminum stranded conductor cable, which comprises a cable body, the cable body comprises a cable core and an outer functional layer, the cable core comprises a wire core, a protective layer and a high-strength alloy armor layer, the protective layer is arranged on the outer side of the wire core, the high-strength alloy armor layer is arranged on the outer side of the protective layer, and the outer functional layer is arranged on the outer side of the high-strength alloy armor layer. The protective layer comprises a wire core sheath layer, an inner insulating layer, a shielding layer and a high-strength tensile fiber layer. The tensile capacity of the steel-cored aluminum stranded conductor cable is enhanced, the operation stability of a power system is improved, and therefore the problems that although a traditional steel-cored aluminum stranded conductor cable has a certain tensile capacity, the tensile performance of the traditional steel-cored aluminum stranded conductor cable can be reduced under extreme weather conditions, external force damage or long-term heavy-load operation and other extreme conditions, and the service life of the cable is prolonged are solved. And the risk of cable breakage is increased.

This utility model relates to the field of rectifier and filter circuits, and more particularly to an AC input rectifier and filter circuit, including a rectifier bridge, a transformer, an anti-interference module, and an overvoltage protection module. A second safety Y capacitor CY2 and a third safety Y capacitor CY3 are connected in series. The third safety Y capacitor CY3 is connected to the N terminal of the mains power supply, and the second safety Y capacitor CY2 is connected to the L terminal of the mains power supply. The overvoltage protection module includes a varistor MOV1. The positive input terminal of a common-mode inductor L1 is connected to the L terminal of the mains power supply. The positive and negative output terminals of the common-mode inductor L1 are connected to the input terminals of the rectifier bridge, respectively. The positive output terminal of the rectifier bridge is connected to the positive terminal of a storage capacitor C3, and the negative output terminal of the rectifier bridge is connected to the negative terminal of the storage capacitor C3. The positive terminal of the storage capacitor C3 is connected to the transformer, and the transformer outputs 12V. This circuit enhances the anti-interference capability of the circuit by optimizing the design of the rectifier and filter circuit; at the same time, the introduction of overvoltage protection components such as a varistor improves the overvoltage protection capability of the circuit.

The application discloses a multi-winding transformer, which comprises a framework and a magnetic core body fixed on the framework, and a first primary winding N1, a first secondary winding N2, a second secondary winding N3, a second primary winding N4 and a shielding layer winding N5 are sequentially and layer by layer wound on the framework; when the second primary winding N4 is wound, the second primary winding N4 is wound on the take-up end of the first primary winding N1, and the start end and the take-up end of the first primary winding N1 and the start end of the second primary winding N4 are all sleeved with an insulating sleeve for providing insulation protection. The primary winding is wound in a layered manner, and the secondary winding is wrapped, so that the magnetic resistance between the primary winding and the secondary winding is reduced through the structure of being tightly wrapped, the coupling interference caused by the distributed capacitance and the leakage inductance is reduced, the coupling coefficient between the primary winding and the secondary winding is improved, and the electromagnetic compatibility of the transformer is improved.

The invention discloses an electromagnetic shielding-based layered wiring structure with a main manipulator easy-to-disassemble design. The structure comprises a structural member serving as a supporting framework and an easy-to-disassemble shell detachably mounted on the outer side of the structural member, and the structural member and the easy-to-disassemble shell are matched to form a wiring space; a guiding shielding piece is arranged in the wiring space and divides the space into at least two physical levels, and the guiding shielding piece is used for guiding different types of main wire harnesses to conduct layered wiring and achieve electromagnetic shielding. In addition, a first closed space formed by a fixing plate and an electromagnetic shielding cover is arranged in the base frame so as to contain a control element, and the tail end holding rotation mechanism guides the cable to be arranged in a split mode through the wiring open groove and the axial channel. According to the invention, electromagnetic crosstalk is effectively inhibited through layered shielding wiring, and the signal precision is improved; the maintenance process is simplified by utilizing the easy-to-disassemble shell; and through a scientific wiring path, the abrasion and shearing risks of the cable under complex movement are prevented, and the reliability and durability of the main manipulator of the surgical robot are remarkably enhanced.

The application provides an anti-interference emergency communication signal enhancement device, which comprises a multi-band antenna array, the multi-band antenna array is connected with a preprocessing circuit, the preprocessing circuit is connected with a machine learning processing chip and a power amplifier, the machine learning processing chip is connected with an environment sensor group, the preprocessing circuit, the machine learning processing chip and the environment sensor group are powered by a dual power supply system, the multi-band antenna array, the preprocessing circuit and the power amplifier are isolated in a high-frequency chamber by a split shielding cavity, and the machine learning processing chip, the dual power supply system and the environment sensor group are isolated in a low-frequency chamber by a split shielding cavity. The machine learning processing chip is used to realize real-time interference filtering parameter adjustment, improve dynamic response capability and anti-interference capability, meanwhile, the split shielding cavity is used to ensure that the high-frequency circuit and the low-frequency circuit work without interference, improve electromagnetic compatibility capability and maintain device operation stability.

This application discloses a chassis for an on-board charger and the on-board charger itself. The chassis includes a first outer shell and a second outer shell, which together form a receiving space. The first outer shell has a top wall and an annular rim, which extends from the outer edge of the top wall toward the second outer shell to enclose at least a portion of the side wall of the second outer shell. At least one fastener is provided in a first area of ​​the side wall of the second outer shell enclosed by the annular rim. According to the embodiment of this application, the chassis of the on-board charger can provide better shielding against electromagnetic radiation, improving the electromagnetic compatibility of the chassis.

The embodiment of the utility model provides an inverter adopting an electromagnetic compatibility design, and the inverter comprises an input side electromagnetic interference filtering module of which the input end is connected with a DC input interface; the input end of the power supply switching unit is connected with the output end of the input side electromagnetic interference filtering module; the input end of the common mode inductor is connected with the output end of the power supply switching unit; the input end of the inversion unit is connected with the output end of the common mode inductor unit; and the input end of the alternating-current inductor-capacitor-inductor filtering module is connected with the output end of the inversion unit, and the output end of the alternating-current inductor-capacitor-inductor filtering module is connected with an alternating-current load interface.

The application relates to a flexible charging module control method and device supporting V2G, comprising the following steps: determining whether there is a hard switching risk according to the comparison result of the load power value and the preset threshold value; in the case that there is a hard switching risk, adjusting the resonant frequency of the CLLL topology to the first frequency interval based on a frequency-duty cycle hybrid modulation strategy, making the resonant current phase and the switch tube voltage phase form a preset phase difference, and adjusting the drive signal duty cycle of the primary side switch tube and the secondary side switch tube, so that the conduction time difference of the primary side switch tube and the secondary side switch tube increases with the decrease of the load power value; based on an adaptive frequency spectrum expansion algorithm, the resonant frequency is periodically dithered in the first frequency interval with a preset step, and the dithering period and the switching period of the switch tube are in a nonlinear mapping relationship; the bidirectional power conversion efficiency is improved, the light load hard switching and electromagnetic interference problems are solved, and the reliable operation of the charging module in the V2G scene is ensured.

The application relates to the technical field of semiconductor structures, in particular to a three-dimensional electromagnetic bandgap structure based on a through silicon via and an array system, which comprises a dielectric substrate, upper and lower surface metal layers and a via array; the metal layers are provided with central interdigital electrodes for generating planar distributed capacitances and edge comb electrodes for realizing electromagnetic coupling, and the vias connect the upper and lower interdigital electrodes to form a three-dimensional resonant loop; the array system realizes non-contact staggered engagement of the edge comb electrodes of adjacent units, forms distributed field interaction in the staggered area and excites a coupled resonant mode; through superposition of an intrinsic mode and a coupled mode in a frequency domain, a continuous wideband noise suppression stopband is formed, and the electromagnetic compatibility of a three-dimensional integrated circuit is significantly improved.

The utility model discloses an intelligent voice interaction terminal for a station, which is characterized by comprising a machine body, an interaction module arranged on the surface of the machine body, and a master control processing module, an acoustic acquisition module and a power management module which are arranged in the machine body, sound holes for sound to flow into the inner cavity are formed in the surface of the machine body, and the double-microphone array is arranged in the machine body corresponding to the sound holes. According to the utility model, the problems of loud noise and difficult voice recognition in an industrial environment are reduced through processing local processing sound.

The invention discloses a transformer comprehensive loss measurement system and method based on SF6 gas insulation and multi-range integration, and the system comprises a three-phase independent high-voltage measurement unit, a data collection unit, an AD conversion module, a signal preprocessing unit, a calculation module, a data caching unit, a communication interface, a data uploading and display unit, and a control host. The method comprises the following steps: firstly, collecting signals, then carrying out AD conversion, then carrying out harmonic filtering, and then carrying out a calculation process; then storing the data; and then the stored data is transmitted to the control host, and then real-time waveform display and report output are performed, so that the contradiction between wide range and high precision is fundamentally solved, field interference and overvoltage impact can be effectively resisted, and the test efficiency and the automation level are greatly improved. And the safety risk caused by manual operation in a high-voltage area is avoided.

The invention provides a photovoltaic panel dead pixel detection method based on unmanned aerial vehicle inspection and intelligent mechanical dog deep learning, and belongs to the technical field of intelligent inspection, an unmanned aerial vehicle and an intelligent mechanical dog in the scheme are both provided with infrared and 8K cameras and acoustic detection devices, cooperative operation and voice interaction can be achieved, and the method is suitable for flight detection of a photovoltaic power station and the unmanned aerial vehicle. High-resolution acquisition and data transmission functions are realized; intelligent mechanical dog ground supplementary detection is adopted, many modules are arranged, acoustic detection is unique, an algorithm is trained through a large number of samples, the detection steps comprise task planning, unmanned aerial vehicle initial detection, mechanical dog supplementary detection, data fusion analysis and result feedback, and compared with traditional manual inspection, the method is high in detection efficiency, and manpower and time are greatly saved; the accuracy is high, and multi-device multi-dimensional detection is combined with deep learning to reduce missed detection and false detection; the comprehensiveness is excellent, and single detection limitation is overcome; the system is good in environmental adaptability, can work normally in extreme temperature and humidity and complex electromagnetic environments, and provides powerful guarantee for operation and maintenance of a photovoltaic power station.

The invention provides an air-cooled heat dissipation case, and belongs to the technical field of electronic equipment heat dissipation, and the air-cooled heat dissipation case specifically comprises a frame body, a front panel, a rear panel, a fan assembly, a connector and a plurality of modules, the frame body comprises an upper mounting plate, a lower mounting plate, a left panel and a right panel which are connected, the front panel and the rear panel are fixedly connected to the front end and the rear end of the frame body respectively, the fan assembly and the connector are installed on the front panel, the upper installation plate and the lower installation plate are each provided with a plurality of guide rails, each module is arranged between every two adjacent guide rails, fins connected with the guide rails are arranged on the upper side and the lower side of the rear panel, and the fins are connected with the guide rails. And gaps among the fan assembly, the upper mounting plate, the lower mounting plate and the fins form an air cooling heat dissipation channel. According to the scheme of the invention, the reliability of the electronic equipment under the conditions of sensitive electromagnetic compatibility and severe use working conditions is greatly improved, and the method is of great significance to the development of air-cooled case products.

The application provides a tile phased array transceiving assembly integrating two-dimensional and difference beam forming networks, which comprises a fastening screw, a radio frequency and port connector, a radio frequency elevation port connector, a radio frequency azimuth port connector, a low frequency connector, an upper cavity, a welding ring, a pin, a lower cavity, a high and low frequency mixed pressure printed board, a radio frequency branch port connector, a multi-channel amplitude and phase control chip and a transceiving integrated multifunctional chip, the multi-channel amplitude and phase control chip and the transceiving integrated multifunctional chip are attached on the high and low frequency mixed pressure printed board, the radio frequency branch port connector is installed on the upper cavity, a mounting position of a wave absorbing material is reserved on the upper cavity, the low frequency connector, the pin, the radio frequency and port connector, the radio frequency elevation port connector, the radio frequency azimuth port connector and the high and low frequency mixed pressure printed board are installed on the lower cavity. The application integrates two-dimensional and difference beam forming networks, so that the transceiving assembly has the advantages of high integration, light weight, low assembly difficulty, high airtightness packaging and small size.

The utility model relates to the technical field of charging piles, in particular to a 480kW split charging pile wiring structure which comprises a cabinet body provided with a top layer, a first layer of rear cross beams and a second layer of rear cross beams at intervals in sequence from top to bottom in the height direction, a first mounting position is arranged between the top layer and the first layer of rear cross beams, and a second mounting position is arranged between the first layer of rear cross beams and the second layer of rear cross beams. A third mounting position is arranged below the second-layer rear cross beam; the top-layer rear cross beam is provided with a first wire arrangement part corresponding to the positive wire outlet end of the first power conversion module in the first installation position, and the first-layer rear cross beam is provided with a second wire arrangement part corresponding to the negative wire outlet end of the first power conversion module and the positive wire outlet end of the second power conversion module in the second installation position. And the second-layer rear cross beam is provided with a third wire arrangement part corresponding to the cathode wire outlet end of the second power conversion module. According to the utility model, vertical modular layout of the power conversion module and the power distribution assembly can be realized, cable cross winding can be avoided by layered isolation of positive and negative buses, and electromagnetic coupling interference is reduced.

This invention provides a packaging structure. In the packaging structure, the lead frame includes at least two solder pads; the back of the chip is mounted on the lead frame, and the front of the chip has multiple solder pads. At least a portion of the solder pads of the lead frame are electrically connected to the solder pads of the chip via bonding wires; a passive device is disposed between and electrically connected to the two solder pads of the lead frame; a molding compound encapsulates the chip and bonding wires, and covers at least a portion of the surface of the solder pads and at least a portion of the surface of the passive device. This avoids mounting the passive device on the PCB outside the packaging structure, significantly reducing PCB layout space, greatly shortening the interconnection distance between the passive device and the chip, reducing the current loop area, reducing parasitic inductance of high-frequency signal paths, reducing magnetic field radiation (i.e., reducing electromagnetic interference), improving high-frequency performance, and reducing coupling with external interference, thus improving electromagnetic compatibility.

The invention relates to the technical field of modular avionics cases, and discloses a modular electronic rack for a complex airborne environment, a module bearing area and a printed board backboard bearing area are of embedded structures, and the joints of side plates on the two sides of the module bearing area and transverse cold plates adopt mutually matched mortise and tenon joint structures. A plurality of modules can be installed and jointly inserted on the printed board backboard in a blind mode to achieve interconnection, and the electronic rack has the capacity of adapting to strong vibration, high temperature, high humidity and heat and salt mist of a carrier and being high in shielding performance due to the fact that the electronic rack is made of sealing pieces and corrosion-resistant materials.