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What are the inductive cores?
Aug 07, 2018



What are the inductive cores?


The word inductor core material is commonly used in the following types:


1. Nickel-zinc magnetic core.


The nickel-zinc core used in the inductive magnetic core belongs to a soft ferrite core, which has the characteristics of high electrical resistance, low magnetic permeability and initial magnetic permeability ranging from 5 to 1500. In addition, since such a nickel-zinc magnetic core has a high surface resistance (100 MΩ or more), it is generally used for a medium-high frequency circuit.


2. Manganese-zinc magnetic core.


Like the nickel-zinc core, the Mn-Zn core is also a soft magnetic core with low surface resistance, high initial permeability, and high saturation flux density, so it is the most ideal power inductor around 100KHz. Moreover, since the initial magnetic permeability of the magnetic core is higher, the surface resistance is lower, so it is generally used in a circuit of 1 MHz or less.


3. Ferrite core.


The ferrite core commonly used in the word inductor core is a high-frequency magnetic material mainly composed of three metal elements: iron (Fe), manganese (Mn), and zinc (Zn). This ferrite core can increase the permeability and improve the quality of the inductor, but its characteristics are high permeability, good temperature characteristics, and low attenuation.


The word inductor core is a good soft magnetic material. After the power is applied, the inductor generates a magnetic field. The core is immediately magnetized. After the power is turned off, the core is immediately demagnetized. The soft magnetic material of the I-shaped magnetic core is nickel zinc and manganese zinc. The most commonly used I-inductor cores made of nickel-zinc are the most used.


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