2752041446

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Common mode chokes have become increasingly popular as a way of achieving electromagnetic compatibility (EMC). They can be used in a variety of applications, including power-line and data-line filtering, differential-mode current limiting, and power converter control. In this article, we will discuss the 2752041446 application field and working principle of common mode chokes.

Application Fields

Common mode chokes are used in a variety of applications that require reduction of common-mode noise, EMC protection, or impedance-matching. Common mode chokes have a broad application field, and can be used in SMPS, LED Drivers, Power Supply Units, Measuring and Test Equipment, HVAC, Motion Control, Industrial Automation, Uninterruptible Power Supply and PC Servers.

In automotive applications, common mode chokes are used to suppress noise generated from DC-Link buses or traction-power lines. Common mode chokes are also used in variable frequency drives, power converters, and in industrial networks like CAN, Profibus, and SSI, as well as automotive communication lines such as CAN-bus, LIN-bus, FlexRay, and MOST.

Working Principle

Common mode chokes work by absorbing or deflecting stray magnetic fields from the main circuit and creating a low impedance path for common mode noise signals. This low-impedance path resists the flow of alternating current. As AC signals pass through the choke, they are stopped by the core material, resulting in a decrease in their amplitude and an increase in their impedance.

Common mode chokes also act as a filter, blocking out noise signals and increasing the signal-to-noise ratio of the system. This helps to protect against interference from outside sources, such as lightning strikes, motor noise, and electrostatic discharge. The choke also improves the overall performance of the system and can be used to limit the flow of high frequency noise.

Common mode chokes are designed to reduce common-mode noise, which is typically caused by unbalanced or misaligned conductors. Common mode noise can cause interference with sensitive electronic systems and could lead to potentially damaging control system failures in industrial environments. Common mode chokes can absorb these noise signals, thus preventing the interference from affecting the operation of a system.

Conclusion

Common mode chokes are becoming increasingly popular as a way of achieving EMC and eliminating or reducing noise. They are used in a variety of applications, including power-line and data-line filtering, differential-mode current limiting, and power converter control. By absorbing or deflecting stray magnetic fields, common mode chokes create a low-impedance path for common-mode noise signals, protecting sensitive electronic systems from interference and potential damage.

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