Equivalent-magnetic-circuit full-powder-core high-frequency three-dimensional reactor

Abstract

The invention relates to an equivalent-magnetic-circuit full-powder-core high-frequency three-dimensional reactor, and belongs to the technical field of reactors, and the problem that for an existing high-frequency reactor, a full-powder-core magnetic core cannot be achieved due to three-phase imbalance is solved. The high-frequency three-dimensional reactor comprises a magnetic core structure and coils, the magnetic core structure comprises core columns which are composed of three same cylinders and arranged in an equilateral triangle mode and magnetic cakes which are composed of two same round-corner triangles or circles and located on the upper sides and the lower sides of the core columns, the core columns and the magnetic cakes are all made of powder-core materials, and the coils are flat wires and are wound on the core columns. The lengths of magnetic paths of the three core columns are the same; each magnetic path comprises one core column and the magnetic cakes; the powder-core materials are iron powder, iron silicon powder, iron silicon aluminum powder, iron nickel powder, amorphous powder and nanocrystalline powder. According to the equivalent-magnetic-circuit full-powder-core high-frequency three-dimensional reactor, the structure is changed into the three-dimensional structure, the magnetic core is formed by splicing the core columns and the magnetic cakes which are made of the powder-core materials, and the whole frequency consumption is reduced; the flat-wire windings are adopted, the heat radiating area is increased to the maximum extent, and the temperature rise is reduced to the maximum extent.

Description

technical field [0001] The invention relates to a full powder core high-frequency three-dimensional reactor with an equal magnetic circuit, and belongs to the technical field of reactors. Background technique [0002] The high-frequency reactor is specially designed for high-frequency filter circuits. It can suppress harmonic components in series in high-frequency circuits to protect other electrical components from safe and reliable operation; it can also reduce current ripples. When the inductance reaches a certain amount It can ensure continuous current and improve the quality of power supply. Most of the existing high-frequency reactors use single-phase / three-phase silicon steel, single-phase full-powder core reactors, and three-phase hybrid core reactors. The existing high-frequency reactors have the following disadvantages: (1) As we all know, ordinary cold-rolled silicon steel is only suitable for circuits below the fundamental frequency of 400Hz, and the loss p∝f^n,...

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Problems solved by technology

The existing high-frequency reactors have the following disadvantages: (1) As we all know, ordinary cold-rolled silicon steel is only suitable for circuits below the fundamental frequency of 400Hz, and the loss p∝f^n, where p is the high-frequency loss, and f is the switching frequency; so Silicon steel reactors are used in high-frequency circuits with very large loss and noise; (2) using three single-phase powder core reactors to form a three-phase reactor has difficulties such as high cost, complicated process and difficult installation; (3 ) and if it is made into a full powder core three-phase reactor, because the powder core material contains air gaps in the pressing process, the magnetic permeability is lower than that of silicon steel materials, usually 26μ-90μ, so the three-phase inductance will be extremely unstable. Balanced, the three-phase deviation can reach 10%-15%; so for high-frequency circuits, it is temporarily impossible to realize a three-phase reactor with a full powder core core

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