ER1840-18JM

Fixed inductors are electronic components consisting of wire wound on a core made of metal or other conductive material. The ER1840-18JM is a commonly used fixed inductor, and is designed for a variety of applications. This article will discuss the application field and working principle of the ER1840-18JM.

Application Field

The ER1840-18JM fixed inductor has a wide range of application areas including automotive electronics, AC/DC converters, LCD backlights, power supplies, and the motor control field. It is also used in motor drives, switching power supplies, and LED lighting. In the automotive market, this product is often found in air conditioning systems where it is used for current-sensing applications.

Design

The design of the ER1840-18JM fixed inductor consists of an interwound shape made up of two coils. The core is made of nickel-plated iron and is shaped in an E-type with a size of 18 x 15 x 9mm. It has a rated current of 12A, a rated DC resistance of 0.23ohms, and a rated inductance of 1.99mH. The inductor has a flat-surfaced structure with a height of 3mm.

Working Principle

The working principle of the ER1840-18JM fixed inductor is based on the laws of electromagnetism. When an electric current passes through the two coils of the inductor, an electromagnetic field is created. This field will induce a voltage across the two coils, affecting the flow of current. The magnitude of the voltage induced is proportional to the rate of change of current, and is referred to as the “back EMF”.

When the current flowing through the inductor is stationary, the back EMF will be zero. However, when the current changes (e.g. when the inductor is switched on or off), the back EMF will be significant and will act to oppose the change of current. This opposition is known as inductive reactance, and is measured in ohms.

Fixed inductors such as the ER1840-18JM are designed to withstand large amounts of current without experiencing excessive losses. The core of the inductor is made from materials that help to reduce the losses by minimizing the eddy current losses and hysteresis losses.

Conclusion

The ER1840-18JM fixed inductor is a versatile and reliable inductor that can be used in a wide range of applications. Its design consists of two coils wound around a nickel-plated iron core, and it has a rated current of 12A, a DC resistance of 0.23ohms, and a rated inductance of 1.99mH. The working principle of the inductor is based on the laws of electromagnetism, and it is designed to withstand large amounts of current without experiencing any excessive losses.