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But it provides a reduction in the core losses. As it is a non-magnetic material, it has low magnetic permeability & low inductance. Ceramic cores are used to provide a shape for the coil & a structure for its terminals to sit upon. The iron powder is very cheap which makes such kind of core design much cost efficient if the size does no matter.Ĭeramic is a non-magnetic material just like air. Due to their higher saturation current, they are used in high power application mostly in chokes such as storage chokes, dimmer chokes, filter chokes, etc. Thus, they are used for frequency below 100 KHz. Therefore the saturation current of this core is relatively very high.īut as we know iron cores are highly susceptible to core losses at high frequency. The air gap between the particles of the core is evenly distributed which decreases the magnetic permeability of the core. Smaller the particle’s size, lesser the eddy current induced. Since the size of the particles determines the eddy current flow in the core. The epoxy insulation coating over the iron particles reduces the eddy current loss in the core. The core of such kind of inductors is made up of a mixture of iron grains with an organic binder such as epoxy resin etc.

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The Ferrite material is very cheap as it is almost made up of iron rust and is very resistant to corrosion. Hence they can be used in high-frequency applications. The ferrite core has very low electrical conductivity which reduces the eddy current in the core, resulting in very low eddy current loss at high frequency. Thus they are used in transformer & inductors.

While Soft ferrites magnetization changes easily & are a good conductor of the magnetic field.

They are not used in inductor because of their high hysteresis loss.

The Hard ferrites are used in permanent magnets as they do not demagnetize very well.

Ferrite is a material with high magnetic permeability made from the mixture of iron oxide (ferric oxide, Fe 2O 3) & a small percentage of other metals such as nickel, zinc, barium, etc. These types of inductor use ferrite core.

Inductance of Air Core Inductor Calculator.

This is why ferromagnetic core inductors are classified in many types. The design & use of different types of ferromagnetic materials for the core of the inductor causes a huge impact on its performance. The core losses comprise of the eddy current loss & hysteresis loss. However, there are some drawbacks of using ferromagnetic core in the form of losses called core losses. It is because of the fact that the ferromagnetic materials have high magnetic permeability & they increase the magnetic field of the coil.

They are also known as iron core inductors.įerromagnetic materials are magnetic in nature & their magnetic core is used to increase the inductance of the coil significantly. Such type of inductor consists of a core that is made up of a ferromagnetic material.

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The main drawback of air core inductor is that mechanical vibration can affect its inductance. They are widely used in RF applications because of their low losses at high operating frequencies.

But the use of non-magnetic core also decreases its inductance. eddy current & stray losses, especially when the operating frequency is very high.

Some types of inductors classified according to their core material are given below: Air Core Inductor:Īir core inductors have non-magnetic core such as plastic, ceramic or just air as suggested by its obvious name.Īir core inductor uses any non-magnetic material as core to reduce the core losses i.e. The material & design of the core specifies the inductance, current capacity & operating frequency of the inductor. The core of the inductor plays an important role in its characteristics.

Types of Inductors Based on Their Usage.

Types Of Inductors Based On Their Core:.