Products - Power Inductor - Delta (2024)

FAQs

What is a power inductor used for? ›

Inductors are primarily used in electrical power and electronic devices for these major purposes: Choking, blocking, attenuating, or filtering/smoothing high frequency noise in electrical circuits. Storing and transferring energy in power converters (dc-dc or ac-dc)

The formula is W = L / I. Here, W stands for total power, L stands for current, and I represents inductance.

Saturation current, denoted as Isat, is defined as the amount of DC current to cause inductance drop. This is typically 5-35 % of its initial value.

In the International System of Units (SI), the unit of inductance is the henry (H) named for 19th century American scientist Joseph Henry. In the measurement of magnetic circuits, it is equivalent to ⁠weberampere⁠. Inductors have values that typically range from 1 μH (10⁻⁶ H) to 20 H.

An inductor has the functions of developing electromotive force in the direction that reduces fluctuation when a fluctuating current flows and storing electric energy as magnetic energy.

Working: A passive electronic component known as an inductor has the ability to store electrical energy in the form of magnetic energy. In essence, a conductor is twisted into a coil, and as electricity enters the coil from the left to the right, this produces a magnetic field that rotates counterclockwise.

The relationship between Power Factor and Inductance is, the former is the effect and the latter is the cause. More the load is inductive, less the value of power factor. In fact, no load is exclusively Resistive or Inductive or even Capacitive.

The purpose of an inductor in a power supply is to prevent rapid changes in current. An inductor, in conjunction with a capacitor, prevents abrupt fluctuations in the power supply's output voltage and current. They are relatively simple components that play an important function in power electronics.

Ferrite Core Inductor. Ferrite core inductors are made of a ferromagnetic material which has high permeability. These inductors have much higher inductances compared to other types. They also have low losses. They are used in noise filters, high quality transformers and DC-DC converters.

What happens when an inductor saturates? ›

When the inductor enters saturation, it can store less energy and the ripple current increases – meaning that the efficiency will be reduced. At this point, the inductor is behaving more like a resistor than an inductor.

The formula is W = L / I. Here, W stands for total power, L stands for current, and I represents inductance.

Inductance is usually measured in units called millihenrys or microhenrys. It is commonly measured by using a frequency generator and an oscilloscope or an LCM multimeter. It can also be calculated through a voltage-current slope measuring the change in the electrical current passing through the coil.

To determine how much power an inductor can handle before burning out, take the current rating times the voltage used in the circuit. To determine power loss from resistance in the inductor, take the DC Resistance (DCR) and use it in the P=I^2*R formula to determine if there is a significant loss.

An inductor has the functions of developing electromotive force in the direction that reduces fluctuation when a fluctuating current flows and storing electric energy as magnetic energy.

Filters & Sensors

Two applications of inductors are their use as filters and sensors. Inductors are commonly used with capacitors in an electrical circuit to create a filter that only allows a certain frequency to pass through the circuit, making them an essential component of electronics.

One of the main differences between a capacitor and an inductor is that a capacitor opposes a change in voltage while an inductor opposes a change in the current. Furthermore, the inductor stores energy in the form of a magnetic field, and the capacitor stores energy in the form of an electric field.

An inductor can oppose or block the passage of alternating current through it. The inductor either acquires the charge or loses the charge. The current across the inductor changes to equalize the current passing through it.