types of inductors and their applications pdf

Types Of Inductors And Their Applications Pdf

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Gowanda designs and manufactures Bobbin Wound Inductors for a variety of power supply and power conversion applications. A Bobbin Wound Inductor is a inductor that is designed with the coil wound on a coil form or bobbin.

Different types of inductors are available based on sizes and ratings. Their physical sizes vary from tiny sizes to the huge transformer, depending on the power being handled and the frequency of AC being used. As one of the basic components used in electronics , inductors are extensively used in much wider application areas like signal controlling, noise elimination, voltage stabilization, power electronic equipments, automobile operations etc.

Types of Inductors and Applications

There are different types of inductors used in the industry. Therefore It is important to know about the specific type of inductor before buying it. We have already shared a detailed post about inductors? Below, we will discuss different types inductors based on different factors and their applications. The core of the inductor plays an important role in its characteristics.

Some types of inductors classified according to their core material are given below:. Air core inductors have non-magnetic core such as plastic, ceramic or just air as suggested by its obvious name. Air core inductor uses any non-magnetic material as core to reduce the core losses i. But the use of non-magnetic core also decreases its inductance.

They are widely used in RF applications because of their low losses at high operating frequencies. The main drawback of air core inductor is that mechanical vibration can affect its inductance. Such type of inductor consists of a core that is made up of a ferromagnetic material. They are also known as iron core inductors. However, there are some drawbacks of using ferromagnetic core in the form of losses called core losses.

This is why ferromagnetic core inductors are classified in many types. These types of inductor use ferrite core. There are two types of ferrites i. 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. Hence they can be used in high-frequency applications. The Ferrite material is very cheap as it is almost made up of iron rust and is very resistant to corrosion. 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.

The epoxy insulation coating over the iron particles reduces the eddy current loss in the core. Since the size of the particles determines the eddy current flow in the core. The air gap between the particles of the core is evenly distributed which decreases the magnetic permeability of the core. Therefore the saturation current of this core is relatively very high. But as we know iron cores are highly susceptible to core losses at high frequency. Thus, they are used for frequency below KHz. 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.

The iron powder is very cheap which makes such kind of core design much cost efficient if the size does no matter. Ceramic is a non-magnetic material just like air. But it provides a reduction in the core losses. In such type of inductors, the core is laminated which means that it is made up of a bunch of thin sheets placed on top of each other in a tight form.

Therefore the eddy current loss in laminated core inductors decreases significantly. They are used in high power applications. Some of these designs are given below:. As the name suggests these types of inductors have a toroidal core which is a circular ring or donut shape core. The core is made of ferromagnetic material.

Due to Low leakage flux, the magnetic field in the core is higher. The other important aspect of the toroidal core is that the core emits less electromagnetic interference EMI in comparison to the other inductors. Which is why they are preferred in designing compact devices, where the components are very close to each other. This type of inductor is made of a bobbin-shaped core.

It is a cylinder with two flat discs at each end. It is also known as drum core inductor. The coil is wounded around the cylinder. It provides a large air gap for its magnetic field to store more energy. And therefore increases the saturation current of the inductor.

This means that the inductor can withstand high peak currents without saturation but at the cost of electromagnetic interference EMI radiation. There are two types of bobbin core inductor i. The unshielded core inductors are cost effective. They are used in power conversion applications where the peak current is large. Inductors are designed for different usage.

Their design varies from application to application where some of these inductors based on its usage are given below. As the name suggests, these inductors have multiple layers of wire wounded on top of each other. Such inductors have large inductance due to an increase in the number of turns of the winding.

Multi-layer inductors are available in SMD surface mount devices packaging. The SMD multilayer inductors have multiple layers of conductive traces on top of each other separated by a ferrite material. These traces act as the coil of an inductor. However, due to an increase in the number of turns of the coil, the parasitic capacitance also increases.

This reduces the Q factor of the inductor which can be improved by using ceramic dielectric material because ferrite cores have losses at very high frequency. They are used in mobile communication devices due to their compact SMD design.

Such type of inductor is designed on a substrate of thin ferrite or magnetic material. A conductive spiral shaped trace of copper is placed on top of the substrate. Such type of inductor is coated with insulation such as molded plastic or ceramics just like the resistors. The core is made from ferrite or phenolic material. The changing magnetic flux due to first winding induces emf in the second winding; this phenomenon is known as mutual inductance.

These both winding are electrically isolated. Thus coupled inductor provides electrical isolation between two circuits. A Transformer is a coupled inductor. They have multiple applications depending on their winding. These inductors are specifically designed to withstand high current without reaching the magnetic saturation region. To increase the saturation current rating, the magnetic field of the inductor is increased, which causes EMI Electromagnetic interference. To reduce the EMI, most power inductors are used with proper shielding.

Such types of inductors are designed for high-frequency applications. A general inductor does not perform very well due to its high impedance and core losses at high frequency. The eddy current loss is directly proportional to the frequency. Thus it is eliminated by entirely removing the core, instead of using air core inductor. While the parasitic capacitance is caused due to the potential difference between the turns of winding that are at close proximity.

It causes the inductor to self-resonate at high frequency. This high frequency causes skin effect where most of the current flow on the surface of the wire, due to increased resistance inside the wire where little to no current flow.

Proximity effect has the same outcome but it is because of the induced eddy current between two wires in close proximity which forces the current to flow on the surface of the wires.

To reduce the resistance due to these effects the winding is made of strips to increases the surface area. Choke is just a simple inductor but it is specifically designed for blocking choking high-frequency signals. The impedance of a choke increases significantly with the increase in the frequency.

The Inductors that are used as chokes are constructed without using any of the impedance reduction techniques which are used to increase its Q-factor. There are two types of Chokes i. As the name suggests, these inductors are designed to have variable inductance. This variable inductor is designed in more than one possible ways. The most common design of variable inductor is having a movable ferrite core. Moving the core along the winding will increase or decrease the permeability which affects the inductance of the inductance.

The core can be designed to slide or screwed in or out of the coil. Another method of variable inductor design is to increase or decrease the number of turns through movable contact on top of the windings. The conductor used in these windings have no insulation so the core must be insulated , thus moving the Contact on top of the turn will change the number of effective turns. As the number of turns is directly proportional to the winding, the inductance varies accordingly.

But the downside of such a method is that the contact short more than one turn which increases the loss in the winding. This issue can be resolved by increasing the space between individual turns and use a grove wheel as a contact. Such type of variable inductor is known as roller inductor. The most efficient method is the use of variometer. It provides a continuous change in inductance.

The variometer is made up of two coils one inside the other connected in series having ratio.

Inductor Types

There are only three basic components in any electronic circuit design- resistor, capacitor, and inductor. We have already covered the introduction to a resistor and its different types , and also covered capacitors and its different configurations. In this tutorial, we are going to know about different types of inductors and how to choose an inductor for different applications. Inductors are often referred to as "AC resistance". The main characteristic of an inductor is its ability to resist changes in current and store energy in the form of a magnetic field. The standard unit of inductance is the henry.

There are various types of inductors are available in the market based on its ratings and sizes and ratings. Their physical sizes differ from small sizes to the enormous transformer, based on the AC frequency being used and power being handled. An Inductor is one of the basic electrical components used in much wider application areas namely signal controlling, voltage stabilization, noise elimination, automobile operations, power electronic equipment, etc. At the present time, the designing improvement technique of an inductor enhances major performance on rest of the circuit. An inductor is also termed as a coil, reactor, or choke, is a two-terminal electrical component used to build various electrical and electronic circuits.

As one of the basic passive components, inductors fill an important role in electronics applications, from starting engines to delivering power to your house. Inductors store energy in a magnetic field when current flows through it. A typical inductor uses insulated wire wrapped into a coil around a central core. As useful as inductors are, the biggest problem is their physical size. Inductors often dwarf other electronic components in a circuit and add weight as well.

Different Types of Inductor and Its Applications

There are different types of inductors used in the industry. Therefore It is important to know about the specific type of inductor before buying it. We have already shared a detailed post about inductors? Below, we will discuss different types inductors based on different factors and their applications.

As electronic devices become more advanced, the power supply voltage of LSIs used in them is lowered, so their power consumption can be reduced and their speed increased. However, a decrease in the power supply voltage also causes the requirements regarding voltage fluctuations to become more severe, creating a need for high-performance DC-DC converters to fulfill these characteristic requirements, and power inductors are important components that greatly affect their performance.

Types of Inductors and Their Applications

An inductor , also called a coil , choke , or reactor , is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force e. According to Lenz's law , the induced voltage has a polarity direction which opposes the change in current that created it. As a result, inductors oppose any changes in current through them. An inductor is characterized by its inductance , which is the ratio of the voltage to the rate of change of current. Many inductors have a magnetic core made of iron or ferrite inside the coil, which serves to increase the magnetic field and thus the inductance.

Inductors perform a number of different styles of function within a circuit. Some types can be used for filtering and removing spikes on power lines, others are used within high performance filters. Others may be used within oscillators, and there are many other areas where inductors can be used. As a result of this, there are many different types of inductor that can be obtained. Size, frequency, current, value, and many other factors means that there is a whole host of different types and forms of inductor. Although there are many different types of inductor, they all comply with the same basic laws of nature.

There are different types of inductors. Depending on their material type they are basically categorized as follows. Ceramic is the most commonly used material for inductor cores. Since ceramic has no magnetic properties, there is no increase in the permeability value due to the core material. Its main aim is to give a form for the coil.

Depending on the application there are many types of inductors, they come in various form factors, there are high-frequency inductors.

The Different Types of Inductors and Their Affecting Factors

Inductors are available in different shapes and has different uses. Their sizes vary depending upon the material used to manufacture them. The main classification is done as fixed and variable inductors. An inductor of few Henries may be in a dumbbell shape at the size of a simple resistor. A fixed inductor always has silver as its first color in color coding.

Хватка на горле Сьюзан слегка ослабла. Стратмор выключил телефон и сунул его за пояс. - Твоя очередь, Грег, - сказал .

Ей хотелось поскорее оказаться в Третьем узле, и она достаточно хорошо изучила своего шефа, чтобы знать: Стратмор никуда не уйдет, пока она не разыщет ключ, спрятанный где-то в компьютере Хейла. Ей почти удалось проскользнуть внутрь, и теперь она изо всех сил пыталась удержать стремившиеся захлопнуться створки, но на мгновение выпустила их из рук. Створки стали стремительно сближаться.

The Different Types of Inductors and Their Affecting Factors

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