Common mode filters inductors also known as common mode chokes or EMC filters (electromagnetic compatibility), are designed to reduce the interference or noise that is generated when power is transmitted from one device to another. They perform this function by reducing the effects of common mode noise, which is caused by high-frequency electromagnetic waves traveling through the power line. Common mode noise can lead to signal degradation, which can result in poor or inconsistent performance.
The core materials used in common mode filters inductors can significantly influence their performance. The most commonly used core material is ferrite. Ferrite is a ceramic material that has a high permeability, which makes it capable of suppressing high-frequency noise. Ferrite-based inductors are typically small in size, which makes them ideal for use in high-frequency applications. However, they have a low saturation current, which makes them unsuitable for high-power applications.
Another core material used in common mode filters inductors is metal alloy. Metal alloy cores are made of magnetic metals such as nickel, iron, and cobalt, which makes them highly effective in filtering high-frequency noise. They have a high saturation current, which makes them suitable for high-power applications. Metal alloy cores are also resistant to temperature and humidity changes, which makes them ideal for use in harsh environments.
Ceramic is another material used in common mode filters inductors. Ceramic-based inductors are typically small in size, which makes them suitable for use in portable devices. They have a high Q factor, which makes them capable of filtering high-frequency noise. However, they have a low saturation current, which makes them unsuitable for high-power applications.
In summary, common mode filters inductors are a critical component in a wide range of applications that require efficient power conversion. The choice of core material can significantly influence their performance. Ferrite cores are suitable for small-size, high-frequency applications, whereas metal alloy cores are ideal for high-power applications. Ceramic-based inductors are suitable for small-size, high-frequency applications.
At KEMET, we provide a wide range of automotive-grade common mode filters inductors that are designed to meet the requirements of demanding applications. Our inductors are made of high-quality materials and are rigorously tested to ensure they meet our high standards of quality and reliability. If you are looking for high-performance power inductors that can help you achieve your goals, contact KEMET today.