Magnetic core of low conductive magnet, manufacturing method and application thereof

Abstract

The invention relates to a magnetic core of a low conductive magnet, a manufacturing method and and application thereof. The magnetic core of the low conductive magnet is made of ferromagnetic magnetically soft alloy, the molecular formula of the alloy is FeaMbCucSidBeM'fXg, wherein M represents Ni and / or Co, M' represents at least one element among V, Ti, Nb, Mo, Cr, Hf, Ta and W, and X represents P, Ge, C and impurities. With atomic percent as the unit, a, b, c, d, e, f and g meet the following conditions: b is larger than or equal to 5 and is smaller than or equal to 40, c is larger than or equal to 0.05 and is smaller than or equal to 1, d is larger than or equal to 1 and is smaller than or equal to 8, e is larger than or equal to 10 and is smaller than or equal to 20, f is larger than or equal to 0.5 and is smaller than or equal to 5, g is larger than or equal to 0 and is smaller than or equal to 0.5, d and e are larger than or equal to 10 and are smaller than or equal to 25, and a is equal to 100 minus b minus c minus d minus e minus f minus g. The microstructure of the using state of the alloy is an amorphous state. The magnetic core is low in magnetic conductivity, high in anti-saturation performance and high in modulation property to alternating current and direct current components. Further, a B-H loop line is of a linear shape, and the magnetic conductivity of the linear B-H loop line is high in modulation property in the alternating current and the direct current.

Description

technical field [0001] The invention relates to a low-permeability magnetic core with low magnetic permeability and high anti-saturation performance and high modulability for AC and DC components, as well as its manufacturing method and application. Background technique [0002] In current transformers and current-compensated choke coils, it is required that the applied magnetic core has a high degree of modulability to the AC and DC components. Among them, for the development of power electronic technology such as frequency conversion air conditioner, the current transformer used in the circuit is required to have a strong ability to resist DC components, and the corresponding requirements for the magnetic core are low magnetic permeability and strong anti-saturation ability . Among the current-compensated interference suppression chokes, for single-phase applications, the current-compensated interference suppression choke has two windings with the same turn and opposite d...

AI Technical Summary

Problems solved by technology

However, due to the relatively low saturation magnetic induction of ferrite, a larger volume of magnetic core is required to achieve the maximum measurable primary current of the current transformer with high linearity in the entire current range. In addition, the ferrite Permeability is also strongly temperature dependent

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