4results about How to "Good electromagnetic properties" patented technology

The utility model relates to the technical field of inductors, in particular to a magnetic integrated inversion inductor which comprises an upper iron yoke and a lower iron yoke. The upper iron yoke is provided with a first upper extension arm, a second upper extension arm and a third upper extension arm which have the same length on the same plane; the included angle between the first upper extension arm and the second upper extension arm, the included angle between the second upper extension arm and the third upper extension arm and the included angle between the third upper extension arm and the first upper extension arm are equal; the lower iron yoke is provided with a first lower extension arm, a second lower extension arm and a third lower extension arm which have the same length on the same plane; the included angle between the first lower extension arm and the second lower extension arm, the included angle between the second lower extension arm and the third lower extension arm and the included angle between the third lower extension arm and the first lower extension arm are equal. According to the utility model, the three independent inductors are integrated into one integral combined inductor, so that the material cost, the weight and the required installation space are obviously reduced, and the photovoltaic inverter is more compact, miniaturized and light.

The invention provides a surface nitriding treatment seawater corrosion-resistant wave-absorbing material and a preparation method thereof, and belongs to the technical field of metal surface treatment.The preparation method specifically comprises the steps that firstly, carbonyl iron powder is pretreated, specifically, acid pickling is conducted to remove surface impurities and an oxide layer, and then the carbonyl iron powder is subjected to surface nitriding treatment; and cleaning residual acid liquor and other soluble impurities with water. And then the pretreated carbonyl iron powder is placed in a nitriding furnace to be subjected to surface nitriding treatment, and after nitriding treatment is completed, heat treatment and surface modification treatment are conducted. And complicated chemical reaction and high-temperature treatment are abandoned, so that the production cost is reduced. After nitriding treatment, a compact iron nitride protection layer is formed on the surface of the carbonyl iron powder, so that the corrosion resistance of the carbonyl iron powder material in a marine environment is enhanced, the electromagnetic property of the carbonyl iron powder material is optimized, and the thermal stability and the electromagnetic wave absorption efficiency are improved.

The utility model relates to the technical field of inductance, provide a kind of copper iron co-fired inductance, including sintered magnet and conductor;The conductor is integrally formed structure, the conductor includes connecting portion and the end portion respectively connected in the both ends of connecting portion, the connecting portion of the conductor is located in the sintered magnet, the both ends of the conductor are exposed to sintered magnet, as terminal, and there is electroplating layer at terminal, forms electrode, the sintered magnet surface is provided with the recess for the terminal accommodation. Reduce electrode exposure, inductance has higher electromagnetic characteristic, to reduce inductance leakage flux, improve inductance performance.

The invention provides a functional fabric with both electromagnetic shielding and microwave absorption and a preparation method thereof, and belongs to the technical field of functional textiles. A core layer fiber, a conductive reflecting layer, a microwave absorbing layer and an impedance matching layer are sequentially arranged on the fiber section of the functional fabric from inside to outside. The multi-level impedance gradient structure and the fiber structure are effectively fused, efficient expression of electromagnetic shielding and microwave absorption performance in the fiber form is achieved, the flexibility and air permeability of a fabric base material are well reserved, and the application prospect in the civil and military fields is wide.