DKFP-0276-0306L

Common Mode Chokes (CMCs) are electrical filter devices primarily designed to inhibit Common Mode (CM) currents on power or signal lines. Due to their ability to control noise, CMCs are ideal for use in a variety of applications that experience high levels of electromagnetic interference (EMI). The DKFP-0276-0306L is a type of high-efficiency CMC designed to suppress interference on two-wire and/or three-wire power and signal circuits. In this article, the application field and working principle of this device will be discussed in detail.

Application Field

The DKFP-0276-0306L CMC is designed for use in a variety of applications where there is a need to suppress EMI. It can be used in low-voltage (below 70V) circuits where high levels of noise interference can occur due to common mode current. It is especially useful for suppressing the transmission of noise and interfering signals on two-wire and three-wire power and signal circuits, such as those found in automotive, industrial, and medical systems. In addition, this device is well-suited for use in power inverters, power drives, and other types of inverters and converters where CM noise can cause problems.

Working Principle

The DKFP-0276-0306L CMC works by suppressing Common Mode (CM) interference on two-wire and/or three-wire power and signal lines. The device features two windings wound in opposite directions on a single core. This allows the device to create an opposing magnetic field which cancels out the noise on the lines. The device also utilizes an inductor core and an attractor element to provide increased efficiency. The attractor element is carefully designed to maintain the effective inductance of the CMC even when the device is experiencing high frequency signals.When a CM current flows through the CMC, the magnetic field generated by the two windings opposes the CM current and reduces its magnitude. This reduces the level of interference on the power and signal lines, thus improving the signal-to-noise-ratio (SNR) of the system. The device also features a high-temperature (up to 125°C) bonding structure which ensures the device can continue to effectively suppress interference even in high-temperature environments.

Conclusion

The DKFP-0276-0306L CMC is designed for use in applications where there is a need to suppress CM currents and improve SNR. This device features two windings wound in opposite directions, an inductor core, and an attractor element to provide increased efficiency. It is well-suited for use in a variety of applications, from automotive to power conversion systems, where there is a need to suppress EMI and improve signal-to-noise-ratio (SNR).