7 results about "Electromagnetic Compatibility Problem" patented technology

The application relates to the field of antennas, and discloses a small satellite antenna selection and layout method, device and medium. In the design process of the antenna layout, the whole-satellite antenna selection and layout are predicted and designed, electromagnetic compatibility analysis is performed in combination with antenna task requirements, an antenna layout design result is obtained, the antenna layout design result meets the antenna task requirements and can normally operate, the small satellite antenna applicability to specific tasks and electromagnetic compatibility problems can be solved, resource waste caused by subsequent design compensation can be avoided, and task failure can be avoided.

The application discloses a shaft current and radiation emission integrated test method and system for an electric drive system, and belongs to the technical field of testing. Through real road working conditions, the method and system realize the synchronous collection of multiple physical quantities of the electric drive system, and combine a high-fidelity digital twin model to perform dynamic correction and simulation analysis, thereby solving the problems of misalignment of data, missing correlation between internal shaft current and external radiation field, and incapability of quantifying the contribution of the shaft current in the traditional test. Therefore, the specific influence of the shaft current in the total radiation emission of the electric drive system can be accurately identified, a quantitative basis is provided for the diagnosis and optimization of electromagnetic compatibility problems, and the efficiency and accuracy of the EMC test and rectification of the electric drive system of the new energy vehicle are improved.

This application provides an electromagnetic protection structure and an electronic device. The electromagnetic protection structure includes: a first structural component comprising a radio frequency (RF) source; a second structural component coupled to the first structural component with a first current path, the first current path including a nonlinear region, wherein a nonlinear effect occurs in the nonlinear region when the coupled current of the RF source passes through it; and a conductive medium electrically connected to the first and second structural components to form a second current path between the second and first structural components, allowing at least a portion of the coupled current of the RF source to flow from the first structural component, through the second current path, to the second structural component. In this application embodiment, the second current path formed by the conductive medium can shunt the first current path, eliminating or weakening the nonlinear effect on the first current path, thereby solving the electromagnetic compatibility problem of the electronic device caused by nonlinear effects.

The application discloses an EMC forward design method and device for a PCB of a pathological detection equipment and the pathological detection equipment, and comprises the following steps: obtaining the functional module composition of the equipment to be designed; determining the number of PCB stack layers according to the functional module composition of the equipment to be designed; based on the electromagnetic characteristic partition principle, the welding layer for welding components on the PCB is laid out and divided into multiple partitions; according to the electromagnetic compatibility requirement of the equipment to be designed, the wiring path is arranged on each partition, and the interface protection area and / or the shielding filter protection area are set to obtain a pre-designed PCB; the pre-designed PCB is simulated, the wiring path of the pre-designed PCB is adjusted according to the simulation result, and the PCB is manufactured according to the adjusted pre-designed PCB. The EMC test is completed before the formal PCB manufacturing, and the passive design mode of re-arranging, rewiring or replacing components for the designed PCB when electromagnetic compatibility problems occur in the later debugging is completely avoided.

The utility model relates to a compressor technical field, especially a kind of compressor control panel, including PCB board, low voltage power supply communication interface, high voltage power supply input interface, compressor drive interface and IGBT chip, further including busbar assembly installed on PCB board, high voltage power supply input interface is installed in the input end of busbar assembly, compressor drive interface is installed in the output end of busbar assembly, low voltage power supply communication interface and IGBT chip are respectively installed on PCB board, so that high voltage current and low voltage current form layered isolation on physical space, this structure fundamentally solves the electromagnetic compatibility problem caused by high and low voltage line sharing PCB board in traditional design, effectively avoids the interference and interference of electromagnetic compatibility on hardware;In addition, high voltage current is placed to busbar assembly, can significantly save the space and layer number of PCB board, reduces material cost.

Embodiments of this application provide an electromagnetic protection structure and an electronic device. The electromagnetic protection structure includes: a first structural member, where the first structural member includes a radio frequency source; a second structural member, where a first current path is coupled between the second structural member and the first structural member, the first current path includes a non-linear region, and when a coupling current of the radio frequency source passes through the non-linear region, a non-linear effect is generated in the non-linear region; and a conductive medium, where the conductive medium is electrically connected to the first structural member and the second structural member to form a second current path between the second structural member and the first structural member, so that at least a part of the coupling current of the radio frequency source flows from the first structural member to the second structural member through the second current path. In embodiments of this application, the second current path formed by the conductive medium can shunt the first current path, so as to eliminate or weaken a non-linear effect on the first current path, thereby resolving an electromagnetic compatibility problem of the electronic device caused by the non-linear effect.