Common-mode inductance

Common-mode inductance

8 month ago

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Xuzhou Jiuli Electronics Co., Ltd

 10 month year

Product details

Structure of common mode inductors

What is common mode inductance?

The common mode inductor is a common mode interference suppression device with ferrite as the core, which consists of two coils of the same size and the same number of turns symmetrically wound on the same ferrite ring magnetic core to form a four-terminal device, which has a large inductance suppression effect for the common mode signal, and a small leakage inductance for the differential mode signal.

Structure of common mode inductors：

The filter circuit of common mode inductors, La and Lb are common mode inductors. The two coils are wound around the same iron core with the same number of turns and the same phase (wound in reverse). In this way, when the normal current in the circuit flows through the common mode inductor, the current produces a reverse magnetic field in the inductor coil wound in the same phase and cancles each other out, and the normal signal current is mainly affected by the coil resistance (and a small amount of damping caused by leakage).

When there is a common mode current flowing through the coil, due to the homotropy of the common mode current, the magnetic field in the same direction will be generated in the coil and the inductance of the coil will be increased, so that the coil shows a high impedance, resulting in a strong damping effect, so as to attenuate the common mode current and achieve the purpose of filtering.

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Xuzhou Jiuli Electronics Co., Ltd

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10 month

Address: Xuzhou, China

Main Product: Electronic Transformer , High-frequency Transformer, Switching Power Supply Transformer, Differential Mode Inductor, I-type Inductor, Common Mode Inductor

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