B2013T

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Common Mode Chokes

Common mode chokes, also known as B2013T application field and working principle, are components that are used in electronic circuits to improve the electromagnetic compatibility of electronic systems. The common mode choke is designed to block high-frequency currents that travel in a common direction along the power or signal lines, and to suppress them as much as possible. These current-controlled components can also be used to isolate power line noise from sensitive components on the circuit board.

Common Mode Chokes are one of the primary tools used to reduce EMI when connecting multiple electronic devices together, in order to ensure the devices operate correctly. By suppressing common mode interference, the CM chokes also help reduce the risk of system failure due to EMI. Common Mode Chokes are often used in a variety of applications, including computers, cell phones, power supplies, motor drivers and industrial control systems.

The working principle of Common Mode Chokes is based on the use of an inductor. An inductor is a device that stores energy in the form of a magnetic field. When a current flows through the inductor, it creates a magnetic field. This magnetic field helps to reduce the fluctuations in current that occur when interference is present in the circuit. The inductors used in CM Chokes are typically composed of a metallic winding, made of either copper or ferrite, that is wrapped around a ferromagnetic core.

The ferrite core of the inductor acts as a shield, allowing only the desired signal to pass through the choke to the circuit board. The ferrite material used in the choke also helps to reduce the energy of the noise, which improves the signal to noise ratio. The inductor also acts as a filter, blocking frequencies above the range specified by the application. Thus, Common Mode Chokes reduce the amount of interference introduced to the circuit, improving signal quality.

Common Mode Chokes are used in many applications, such as to decouple signals from power lines, to reduce the interference caused by high-current switching, and to protect against noise coming into the circuit from external sources. Common Mode Choke solutions also include surge protection, ground blanch, and line filters. They also help improve the electromagnetic compatibility of the system, and are an important part of EMC testing.

Common Mode Chokes are an invaluable tool for improving the performance of electronic systems. By suppressing interference and noise, these devices help to ensure the reliable operation of systems in a wide range of applications, from medical to aerospace.

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