5results about How to "Reduce AC resistance" patented technology

The invention discloses a transformer and a vehicle, and relates to the technical field of transformers. The second magnetic core is oppositely connected with the first magnetic core; the first coil is wound on the first magnetic core; the coil assembly comprises a second coil and a third coil which are wound on the second magnetic core in parallel, the first coil and the second coil are arranged in a spaced mode to form first leakage inductance, the first coil and the third coil are arranged in a spaced mode to form second leakage inductance, and the first leakage inductance and the second leakage inductance form resonant inductance. According to the technical scheme provided by the invention, the volumes of the transformer and the resonant inductor are reduced.

The purpose of the present invention is to reduce AC resistance. In a multilayer substrate (100), a plurality of ground electrodes (41-44) are separated from each other in the thickness direction (D1) of a laminated substrate (1), and are adjacent to a plurality of signal lines (21-24) in the width direction of the plurality of signal lines (21-24). In a first transmission line region where the maximum line width of the plurality of signal lines (21-24) is minimum, the plurality of signal lines (21-24) do not overlap with any one of the plurality of ground electrodes (41-44) in the thickness direction (D1) of the laminated substrate (1). In a second transmission line region (102) in which the maximum line width of the plurality of signal lines (21-24) is the largest, one ground electrode (41) among the plurality of ground electrodes (41-44) overlaps with signal lines (22-24) other than the signal line (21) adjacent to the one ground electrode (41) among the plurality of signal lines (21-24).

The invention discloses a cable core structure, a cable structure and a manufacturing process, the cable core structure comprises a middle core wire, the periphery of the middle core wire is sequentially wrapped with a plurality of core wire layers, each core wire layer is formed by twisting a plurality of core wires, and the middle core wire and the core wires in each core wire layer adopt polyimide enameled copper wires; every two adjacent core wire layers are isolated through an insulating water-blocking tape, and the outermost core wire layer is wrapped by a wrapping tape. According to the invention, the energy transmission capability and the current-carrying capacity of the cable are obviously enhanced; an insulating water-blocking tape segmentation technology is introduced into the cable core design, so that the production process is simplified, the skin effect is effectively relieved, and the alternating-current resistance of the cable is reduced; polyimide with excellent heat resistance, solvent resistance, refrigerant resistance and high insulating property and copper with lower density and lower cost are adopted as the core wire core material of the cable, so that the manufacturing and mounting cost of the cable is reduced, and the production process is simplified.

The invention relates to the technical field of power cables, in particular to a middle-high voltage power cable for long-distance high-capacity power transmission and a preparation method of the middle-high voltage power cable for the long-distance high-capacity power transmission. The conductor shielding layer is coated on the outer wall of the layered split conductor; the insulating layer is coated on the outer wall of the conductor shielding layer; the insulating shielding layer is coated on the outer wall of the insulating layer; the buffer layer coats the outer wall of the insulation shielding layer; and the armor layer coats the outer wall of the buffer layer. The layered split conductor structure breaks through the process limitation of the number of traditional split conductor strand blocks, the composite insulation structure layer is composed of the micro-arc oxidation insulation separation layer and the composite elastic insulation rope, the ultra-thin and tough ceramic coating replaces crepe paper, the filling coefficient and the insulation reliability are improved, and through the filling buffering effect of the elastic rope, the insulation performance of the conductor is improved. And the integrity of the insulating coating under a harsh process is protected.

The utility model discloses a kind of intermediate frequency DC reactors, including magnetic core, coil, input conductive row and output conductive row, the magnetic core is oppositely equipped with two iron columns, the coil is equipped with two groups and is respectively wound on the two iron columns of the magnetic core, the coil is wound with thin wide metal foil and is formed, the input conductive row is located in the lower portion of this intermediate frequency DC reactor and is connected with the coil, the output conductive row is located in the upper portion of this intermediate frequency DC reactor and is connected with the coil. The utility model winding loss is small, and the heat dissipation performance is excellent, compact structure, high reliability, strong environmental adaptability, can be adapted to intermediate frequency working condition.