7results about How to "Shield electromagnetic interference" patented technology

The utility model discloses a high strength shock resistant rubber medium voltage cable relates to medium voltage cable technical field, including cable core, the cable core is composed of two sets of wire core, the wire core includes conductor, wrapping the outside of conductor insulating layer and wrapping the outside of insulating layer shielding layer, the outside of cable core is provided with buffer layer, and the outside of cable core is provided with the buffer layer. The buffer layer comprises an elastic inner layer and a fiber braid layer, the elastic inner layer is coated with the fiber braid layer, a reinforcing layer is arranged outside the buffer layer, the reinforcing layer comprises a supporting inner layer and an anti-impact outer layer, the supporting inner layer is coated with the anti-impact outer layer, an outer protective layer is arranged outside the reinforcing layer, and the anti-impact outer layer is arranged outside the outer protective layer. The outer protective layer comprises a wear-resistant base layer and an anti-tear surface layer, the wear-resistant base layer is coated with the anti-tear surface layer, and the problems that the impact resistance effect of the medium-voltage cable is poor and the improvement of the insulation performance is limited are solved.

The invention discloses a board-to-board connector with a shielding structure. The board-to-board connector with the shielding structure comprises a first circuit board, a first connecting piece, a buffer conductor, a second circuit board, a second connecting piece and a shielding cover, the first connecting piece is arranged on the first circuit board; the buffer conductor is arranged on the first circuit board and surrounds the first connecting piece; the second circuit board is perpendicular to the first circuit board, and one side edge of the second circuit board is provided with a first metal layer; the second connecting piece is arranged on the second circuit board and is in butt joint with the first connecting piece along a butt joint direction; the shielding cover is arranged on the second circuit board and surrounds the second connecting piece; when the second connecting piece is in butt joint with the first connecting piece in the butt joint direction, the side edge of the second circuit board abuts against the buffering electric conductor, so that the first metal layer is electrically connected to the buffering electric conductor, and the shielding cover surrounds the first connecting piece. The first metal layer of the board-to-board connector with the shielding structure provided by the invention can make up the problem that the shielding cover cannot completely shield the connector.

The utility model discloses an anti-electromagnetic interference shielding shell structure based on a new energy automobile motor controller, which comprises a mounting seat, the top of the mounting seat is connected with a protective shell in a clamping manner, the inner wall of the protective shell is connected with a metal shielding layer in a clamping manner, and the top of the mounting seat is in bolted connection with an exhaust fan close to one side. Buckle structures are symmetrically and fixedly connected to the positions, close to the side wall, of the top of the mounting base, and a reinforcing assembly is mounted at the position, close to the corner of one end, of the top of the mounting base. According to the motor controller, the metal shielding cover is arranged in the controller shell, so that external electromagnetic interference can be shielded, the motor controller can work stably, the shell is arranged to be in a covering mode, the motor controller can be rapidly installed and fixed through a buckle structure, and meanwhile, the positioning and reinforcing assembly is additionally arranged, so that the motor controller can work stably. And the protection strength of the whole controller shell is improved.

This invention discloses a cavity electrically tunable preselection filter, relating to the field of wireless communication equipment. It includes a mounting cavity and a PCB board. The PCB board is fixed to the mounting cavity via connectors and houses an integrated circuit and a coil assembly. The mounting cavity contains four resonant cavities and two circuit-shielded resonant cavities. The four resonant cavities are arranged side-by-side along the length of the mounting cavity. The two circuit-shielded resonant cavities are arranged side-by-side along the width of the mounting cavity and located in the middle of the four resonant cavities, serving to shield the integrated circuit and provide resonance for the resonant cavities on either side. The coil assembly includes four coils for specific frequency bands. The four coils are electrically connected to the PCB board and located within the four resonant cavities. It features a compact structure, excellent filtering performance, and adaptability to complex electromagnetic environments.

The utility model discloses a motor structure and vehicle electric power assisted steering system with it relates to motor technical field, including: the pivot, the fixed sleeve, the fixed sleeve downside is provided with the first mounting hole, the pivot upper end is inserted into the first mounting hole, the fixed sleeve upside is provided with the second mounting hole, the hole wall of second mounting hole is non -circular hole wall, the inductive magnet is located in second mounting hole, the lateral wall of inductive magnet is non -circular lateral wall, the outside wall of non -circular lateral wall is stuck up the inside wall of non -circular hole wall, the circuit board is located inductive magnet top, the circuit board downside is provided with sensor, the fixed sleeve is installed in pivot end position, and inductive magnet is not easy to axial deviation on the pivot, and the non -circular lateral wall of inductive magnet and the non -circular hole wall of fixed sleeve correspond with the design of fixed sleeve and ensure that inductive magnet is not easy to rotate and slide deviation on the pivot, so as to guarantee the precision of sensor pivot monitoring.

The utility model relates to a kind of multilayer polycarbonate radar protective cover with outer surface heating function, including polycarbonate base material, polycarbonate base material outer surface is sequentially provided with hardening layer, ITO film layer, AR film layer, the upper end of ITO film layer is provided with upper conductive silver paste, the lower end of ITO film layer is provided with lower conductive silver paste, the cross section of the upper conductive silver paste and the lower conductive silver paste is cylindrical.The utility model can effectively improve the operating performance of radar system, prevent water vapor condensation or frost formation.

The invention discloses an insulating flame-retardant patch convenient to position and mount, which comprises a silica gel protective film, the upper surface of the silica gel protective film is a silica gel glue layer, and the silica gel protective film is provided with a positioning hole and a pull lug; the conductive single-sided adhesive tape comprises a conductive base material layer and a conductive adhesive layer located on one side of the conductive base material layer, and one side, deviating from the conductive adhesive layer, of the conductive base material layer is adhered to the silica gel glue layer of the silica gel protective film; the flame-retardant insulating film is attached to the conductive adhesive layer of the conductive single-sided adhesive tape; the double-sided adhesive layer is of a hollow structure matched with the outer contour of the flame-retardant insulating film, and the double-sided adhesive layer is attached to the edge area of the conductive single-sided adhesive tape and surrounds the periphery of the flame-retardant insulating film. According to the invention, while the thinning requirement is met, the integration of multiple functions of accurate positioning and mounting, convenient and fast tearing of the protective film, efficient electromagnetic shielding, high-grade insulation and flame retardance and firm fixation is realized.