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Common Mode Chokes

Common Mode Chokes, also known as CM chokes, are a type of filter inductor which seeks to reduce the effect of Electromagnetic Interference (EMI) on signals passing through an electrical circuit. They are used to reduce the amount of unwanted signal transmission by blocking the signals, and they can be used in power, data and RF circuits.The most common type of CM choke is the CM2722R201R-00, which is designed for general purpose filtering applications in power circuits. It provides effective reduction of EMI, delivers high-performance in low-coefficient power circuit designs and is small in size.

Application field

The CM2722R201R-00 Common Mode Choke has a wide range of applications in power electronics and signal transmission. It is suitable for use in electronic control circuits, microprocessors and other multi-channel noise-sensitive applications. This type of choke is particularly effective in AC/DC and DC/DC converter circuits, where EMI regulation is needed in addition to power factor correction. It can also be used in automotive and telecommunications applications, such as in 4G communications systems and 5G networks.

Working principle

The CM2722R201R-00 is an inductive filter which works by blocking unwanted current and influencing EMI signals. It consists of two coils, a common-mode coil and a differential-mode coil, which are connected in series. This type of choke is designed to absorb conducted EMI noise, such as high-frequency interference signals from the mains power or short disturbances from switching devices. The choke allows for a current to pass through the coils which then cancels out the interfering signals. As a result, the desired signal is not affected by the noise and reaches its destination undisturbed.

Conclusion

The CM2722R201R-00 is an effective and versatile filter which is designed to provide high-performance in power circuits. It features effective EMI suppression, delivers high-performance in low-coefficient power circuits, and is small in size for easy installation. As a result, this type of common mode choke is an ideal choice for many noise-sensitive applications in a variety of industries.

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