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2022-08-19

Classification of common inductors

1. Chip inductors 2. Power Inductors 3. Common Mode Inductors

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An overview of soft ferrite materials

Soft magnetic materials have very low coercivity and can be repeatedly magnetized in a magnetic field. When the external electric field is removed, all or most of the magnetic properties obtained will disappear.

2022/08/19

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Uses of soft ferrite

The magnetic permeability of telecom ferrite is from 750 to 2300, with low loss factor, high quality factor Q, and stable permeability with temperature/time. It is the slowest decline in permeability during operation, about It declines by 3% to 4% every 10 years. Widely used in high-Q filters,

2022/08/19

Features of soft ferrite

The characteristics of soft ferrite are: low saturation magnetic flux density, low magnetic permeability, low Curie temperature, low medium and high frequency loss, and low cost. The first three lows are its shortcomings, which limit its range of use, and efforts are being made to improve it now. The latter two lows are its advantages, and it is beneficial to enter the high frequency market, which is now working hard to expand.

2022/08/19

What are the main applications of ferrite magnetic materials?

Ferrite is divided into soft ferrite and permanent ferrite. soft ferrite There are manganese ferrite (MnO Fe2O3), zinc ferrite (ZnO Fe2O3), nickel zinc ferrite (Ni-Zn Fe2O4), manganese magnesium zinc ferrite (Mn-Mg-Zn Fe2O4), etc. One-component or multi-component ferrites. The resistivity is much larger than that of metal magnetic materials, and it has higher dielectric properties, so ferrites with both ferromagnetism and ferroelectricity as well as ferromagnetism and piezoelectricity appear. It has a much higher magnetic permeability than metal magnetic materials (including iron-nickel alloys, aluminum-silicon-iron alloys) at high frequencies, and is suitable for working at frequencies from several kilohertz to several hundred megahertz. Processing ferrite belongs to the general ceramic process, so the process is simple, and a lot of precious metals are saved, and the cost is low. The saturation magnetic flux density Bs of ferrite is low, usually only 1/3 to 1/5 of iron. The low magnetic energy stored in the unit volume of ferrite limits its application in low frequency, high power and high power fields that require higher magnetic energy density. It is more suitable for high frequency, low power, and weak current applications. Nickel-zinc ferrites can be used as antenna rods and intermediate frequency transformer cores in radios, and manganese-zinc ferrites can be used as line output transformer cores in TV receivers. In addition, soft ferrite is also used in inductors and filter cores in communication lines. In recent years, it has also been used as a high-frequency magnetic recording transducer (magnetic head). Permanent magnet with barium ferrite (BaO·6Fe2O3) and strontium ferrite (SrO·6Fe2O3). It has high resistivity and belongs to the semiconductor type, so the eddy current loss is small and the coercive force is large. It can be effectively used in the magnetic circuit of the large air gap, and is especially suitable for the permanent magnet of small generators and motors. It does not contain precious metals such as nickel and cobalt, has abundant raw material sources, uncomplicated process and low cost, and can replace AlNiCo permanent magnets. Its maximum magnetic energy product (B+H)m is lower, so it is larger than metal magnets under the same magnetic energy. Its temperature stability is poor, its texture is brittle and fragile, and it is not resistant to shock and vibration. It is not suitable for measuring instruments and magnetic devices with precision requirements. Permanent magnet ferrite products are mainly anisotropic series. They can be used to make permanent magnet ignition motors, permanent magnet motors, permanent magnet concentrators, permanent magnet lifting heads, magnetic thrust bearings, magnetic separators, speakers, microwave devices, magnetic therapy tablets, hearing aids, etc.

2022/08/19

Development trend of soft ferrite materials of soft ferrite materials

Now soft ferrite products, high-tech applications account for 22%, such as digital communication, electromagnetic compatibility (EMC), radio frequency broadband, anti-electromagnetic interference (EMI), high-definition display, automotive electronics. The traditional medium and low-end product fields account for 78%, such as TV sets, power adapters, electronic ballasts, ordinary switching power supply transformers, and antenna rods.

2022/08/19

The role and principle of inductance

The role of inductance: Electricity generates magnetism, magnetism generates electricity, the two complement each other and are always displayed together. Inductance When a wire has a constant current flowing through it, a constant magnetic field is always excited around the wire.

2022/08/19

What is the function of inductance What is the function of inductance

The main function of the inductor is to isolate and filter the AC signal or form a resonant circuit with capacitors and resistors.

2022/08/19

Basic knowledge of inductors

Inductors are commonly referred to as inductors and are one of the most commonly used basic electronic components.

2022/08/19

What are the main types of inductors? The structure and classification of inductors

In order to strengthen electromagnetic induction, people often wind the insulated wire into a coil with a certain number of turns. Inductors are also called chokes, reactors, and dynamic reactors. Inductance (inductance coil) is an electromagnetic induction element wound with insulated wires (such as enameled wire, yarn-covered wire, etc.), and is also one of the commonly used components in electronic circuits.

2022/08/19

Classification of common inductors

1. Chip inductors 2. Power Inductors 3. Common Mode Inductors

2022/08/19

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