B82730U3102A020

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Common Mode Chokes

The B82730U3102A020 is a component united by modern electromagnetic technology, which functions as a common mode choke (CMC). Common Mode Chokes, also known as Line Filters, provide a measure of electrical protection and reduce interference to both the local and outside power line. By suppressing common mode noise, they help satisfy the EN55022 Class A (or CISPR22 Class A) specifications requirements.

Application Field

Common mode chokes are used for both input and output connections for power supply units, communication devices, and other electronic products. In an input connection, the CMC is used to level out any kind of interference from the power supply to the internal components. In an output connection, the CMC can suppress any kind of conducted interference caused by the internal components of the device.

Common mode chokes are also used as filters for numerical control systems. This is especially important for systems that need to move in multiple axes, such as robots and other automated moving machinery. The CMC filters can help suppress any induced noise from the other motors, helping the motor run smoother and more efficiently and extending the motor’s overall life.

Working Principle

Common mode chokes work by connecting two or more windings in series. By utilizing the inductance of each winding, these chokes are able to create a significant common mode impedance in the core of the choke which can then limit the noise current that is being conducted. This disrupts the flow of current in the signal, resulting in significantly less noise being conducted to the other components in the system.

The common mode choke consists of two windings; the primary winding and the secondary winding. The primary winding is connected in series with the power line, and is usually created using several turns of wire. The secondary winding is wound separately, and it is connected in parallel with the first one. This winding usually contains several insulating layers to reduce the common mode current flowing between them.

The B82730U3102A020 is a specially designed CMC for use in power supply applications. It has been designed to withstand higher voltages, reduce electromagnetic interference, and increase the overall lifetime of the system it is connected to. It can also be used in more demanding electrical environments due to its outstanding EMI characteristics.

In short, the B82730U3102A020 is a modern common mode choke component that provides protection against interference and conducted noise in both input and output connections, helping systems to maintain their EMI levels to comply with EN 55022 Class A specifications.

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