3 results about "High frequency electromagnetic radiation" patented technology

A high frequency electromagnetic radiation generation device is disclosed that includes a high voltage input, a nonlinear transmission line, an antenna, and a pulse recirculating circuit. In some embodiments, the high voltage input may be configured to receive electrical pulses having a first peak voltage that is greater than 5 kV, and / or may be electrically coupled with the nonlinear transmission line. The antenna may be electrically coupled with the nonlinear transmission line and / or may radiate electromagnetic radiation at a frequency greater than 100 MHz about a voltage greater than 5 kV. The pulse recirculating may be electrically coupled with the high voltage input and the antenna. The pulse recirculating circuit may include a diode; a low pass filter; and a delay line. In some embodiments, unradiated energy from the antenna is directed through the pulse recirculating circuit to the nonlinear transmission line with a delay of less than 100 ns.

This invention discloses a method and system for detecting fault arcs in a distribution box, comprising: simultaneously acquiring the current signal of the target line inside the distribution box and the 30MHz-300MHz high-frequency electromagnetic signal radiated from the internal space; extracting the peak-to-peak ratio and pulse density of the electromagnetic signal, and the gradient abrupt change, zero-rest phenomenon enhancement, and high-frequency noise energy ratio of the current signal; fusing the two types of features into a joint feature vector, inputting it into a fault arc classification model pre-trained based on a deep forest algorithm; and combining an adaptive dynamic threshold to determine whether a fault arc has occurred. This invention creatively employs feature-level collaborative analysis of high-frequency electromagnetic radiation and current waveforms, achieving dual capture and cross-validation of the essential characteristics of fault arcs. It has the advantages of fast response, high reliability, strong environmental adaptability, and ease of deployment in embedded environments within distribution boxes, effectively solving the problems of high false alarm rate and insensitivity to low-energy arcs in traditional methods.

The utility model discloses a shielding anti -interference's flywheel converter cabinet body, through the division structure divides the cabinet body for power area and control area, realizes two area physical isolation, blocks the cross -region electromagnetic coupling while promoting space utilization. The division structure adopts the metal partition made of aluminium -zinc coated sheet or galvanized steel sheet, forms one -level area shielding, effectively absorbs the low -frequency magnetic field interference of strong electric component of power area, is equipped with at least one pull -out box in control area, and the box body shell adopts aviation aluminium alloy material and is equipped with the conductive coating in the joint, forms two -level box shielding, forms strong reflection to high -frequency electromagnetic radiation, realizes full -band electromagnetic protection. Power area and control area pass through the layout optimization component installation of division, and the pull -out box body design is convenient for maintaining, and shielding layer does not need to dismantle, and the cabinet frame, the plate assembly etc. adopt aluminium -zinc coated sheet or aviation aluminium alloy and are connected through riveting process, and cooperate directional threading hole structure, and further strengthen the anti -interference effect.