4results about How to "Avoid tip discharge" patented technology

The invention discloses a power device packaging method and equipment. The power device packaging method comprises the following steps: providing a bearing film and a copper foil; wherein the bearing film and the copper foil are loaded in a roll form; the copper foil and the bearing film are compounded, the compounded copper foil is etched to form a copper sheet, and the copper sheet and the bearing film are collected to form a copper sheet material roll; wherein the copper sheet has a preset copper bridge plane shape; feeding the copper sheet material roll; and punching and bending the copper sheet to form a copper bridge, and attaching the copper bridge to the power device substrate to complete packaging of the power device. According to the technical scheme of the embodiment of the invention, the preparation cost of the copper bridge can be reduced, and the performance of the whole IGBT power device can be ensured.

The invention relates to the technical field of aircraft lightning test and protection, and discloses a small-scale aircraft lightning test pneumatic discharge device, comprising a pneumatic transmission unit, a lightning waveform discharge unit and a residual charge discharge unit. The pneumatic transmission unit comprises an air compressor, an air intake valve, an air storage tank, a pressure regulating valve, an electromagnetic valve drive unit, a main air pressure pipeline, a control valve 1, a control valve 2, a pneumatic cylinder 1 and a pneumatic cylinder 2. The lightning waveform discharge unit comprises a high-voltage discharge switch 1, comprising a high-voltage discharge electrode 1 and a trigger electrode. The residual charge discharge unit comprises a high-voltage discharge switch 2, a discharge resistor 1 and a discharge resistor 2. The invention provides a discharge device for mobile aircraft lightning test equipment, which can achieve high-quality discharge of a maximum of 200kV and a maximum of 200kA, and can ensure the safety of aircraft lightning test at the same time. The designed high-voltage discharge electrode is small in size and easy to install. The pneumatic transmission adopted can avoid interference from a strong electromagnetic environment in a square cabin.

This utility model discloses a miniaturized ceramic dielectric chip, belonging to the field of capacitor technology, to solve the problem that when the edge of a disc ceramic capacitor contacts the circuit board, stress concentration easily leads to edge breakage, which not only reduces the product yield but may also affect the reliability and service life of the entire circuit system. This utility model uses Y5U ceramic material with a dielectric constant of 8500-9200 as the ceramic dielectric substrate. Its shape is a cube with dimensions of 7×5×1.2mm. The four corners of both the front and back sides are chamfered, and the ends of the vertical edges on all four sides are rounded at the chamfer connections, with an arc length of 0.4mm-0.5mm. Within this arc range, the stress concentration problem during mounting is effectively alleviated, the structural stability of the chip is ensured, and the electric field distribution is optimized.

The present application relates to a kind of electrically conductive rod assemblies and through core support insulator.Electrically conductive rod assembly includes: electrically conductive rod;Two electrically conductive blocks are provided, and two electrically conductive blocks are respectively at the two ends of electrically conductive rod;Supporting disc is arranged in the side of electrically conductive block towards electrically conductive rod, supporting disc is equipped with supporting disc threaded hole and supporting disc perforation, supporting disc threaded hole is at the central position of supporting disc, and supporting disc perforation is at least two and is arranged with interval around supporting disc threaded hole;The side of electrically conductive block towards supporting disc is equipped with conical hole, and the size of the end of conical hole close to supporting disc is greater than the size of the end of conical hole away from supporting disc;The end of electrically conductive rod is equipped with conical section and threaded section, threaded section is connected with supporting disc threaded hole by screw thread, and conical section is inserted with conical hole;Fastening bolt is connected in electrically conductive block by screw thread through supporting disc perforation, to press electrically conductive rod on electrically conductive block by supporting disc, and then make conical section and conical hole closely contact.