B82720K2301N040

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Common mode chokes are electronic components designed to reduce or eliminate high-frequency noise in electronic devices. The B82720K2301N040 is an example of such a component. This article provides an overview of its application field and working principle.

Application Field

The B82720K2301N040 is a common mode choke primarily used to suppress interference in communication, such as IGBT-driven inverters used in electric vehicles, as well as other power supply and motor control circuits. Additionally, it is used in LCD monitors and the power supplies for industrial equipment, switching power supply adapters, mining machines, and general-purpose power supplies. It can also be used to reduce conducted disturbances in communication lines.

Working Principle

Common mode chokes operate using a unique combination of magnetics and capacitance to reduce both the amplitude and spectral bandwidth of common mode noise. The B82720K2301N040 consists of a symmetrical structure of several wound ferrite cores and capacitors that are oriented in the opposite direction to each other. This creates an electromagnetic field that allows the winding to capture the differential mode noise and reject the common mode noise. By doing this, the device is able to reduce the amplitude of the common mode noise while also eliminating its frequency components.

The working principle of the B82720K2301N040 in reducing conducted disturbances in communication lines is based on the same principle used in other common mode chokes. The choke functions by rejecting signals from one line to the other in the opposite direction. As a result, signals from the conductive line are blocked from flowing into the other, thus minimizing disturbances from travelling through the communication wire.

In addition to its common mode power line noise suppression capability, the B82720K2301N040 can also reduce power line noise and prevent oscillation at harmonics of 100 kHz. It also offers a high impedance between individual conductors, which can eliminate signal ground-loops caused by impedance mismatch.

Conclusion

The B82720K2301N040 is an example of a common mode choke used to reduce power-line noise and conducted disturbances in communication lines. It operates using a combination of magnetics and capacitance to create an electromagnetic field that can reject common mode noise while also eliminating its frequency components. This choking function and its ability to reject signals from one line to another make the B82720K2301N040 an ideal choice for reducing power-line noise and preventing oscillation at harmonics in various types of electrical and communication systems.

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