PFC inductor vertically wound by flat wires shaped like Chinese character 'ri '

Abstract

The invention discloses a PFC inductor vertically wound by a flat wire shaped like a Chinese character 'ri '. The PFC inductor comprises a square magnetic cover; a linear magnetic core which is arranged in the hollow part of the square magnetic cover; a flat wire which is three-dimensionally wound on the linear magnetic core, and an air gap is formed between the flat wire and the square magnetic cover; a flat wire single-layer flat wire which is vertically wound and closely wound on the straight-line-shaped magnetic core middle column, the periphery of the flat wire single-layer flat wire is surrounded by the closed square-shaped magnetic core, better magnetic shielding is formed, coil exposure is reduced to the maximum extent, and therefore interference to a peripheral circuit is reduced.Due to the fact that the air gap is formed between the linear magnetic core and the square magnetic core, the PFC inductor is higher in impedance, larger in current resistance, higher in resonant frequency and lower in distributed capacitance. The PFC inductor vertically wound by the flat wire shaped like the Chinese character'ri 'is high in energy efficiency and low in loss, and the overall efficiency can be improved; the device utilization rate space is improved, and the power density of the power supply is improved. The production process of the inductor is simple, automatic production canbe achieved, and the labor cost is reduced to a great extent; full-automatic large-batch production can be achieved, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of energy storage inductors, in particular to a vertical winding PFC inductor with a Japanese-shaped flat wire. Background technique [0002] With the rapid development of science and technology today, more and more electronic products are developing in the direction of high efficiency, high power density, high reliability and low cost. In order to save costs, develop high-power and miniaturized components, the automatic combination of components has become the future development trend. More and more electronic products are developing towards the direction of automatic integrated design to save the use of labor and reduce the design space. [0003] Most of the existing inductors are designed with toroidal cores. Most of the toroidal core designs cannot be automatically wound, resulting in a lot of labor. In addition, such designs are generally single-function designs, resulting in design The space cannot be...

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Problems solved by technology

[0003] The configuration of existing inductors is mostly based on the ring-shaped iron core design. Most of the ring-shaped iron core designs cannot be automatically wound, resulting in a lot of labor. In addition, such designs are generally single-function designs, resulting in design The space cannot be reduced, and the cost can be reduced by setting a mouth-shaped inductor; an inductor with an application number of 201621212931.9 in the prior art center discloses an inductor with a mouth-shaped iron core, and the claim of the invention protects an inductor including a mouth Type iron core, I-type iron core, base, winding frame, winding; and the winding is wound on the mouth-type iron core and winding frame, the structure of the inductor is complicated, the winding method is complicated, the production cost is high, and the energy efficiency is low. high loss

The I-shaped inductor has the characteristics of simple structure, but the I-shaped inductor cannot achieve the effect of shielding EMI, which affects the use; and if the magnetic cover is not sealed, it will have the disadvantage of magnetic flux leakage, which cannot effectively shield EMI. Effect

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