How does the Differential Mode Inductor use the characteristics of FeSi materials to achieve its function in the circuit?
Publish Time: 2024-11-05
Differential Mode Inductor plays a key role in anti-interference in the circuit, and the characteristics of FeSi materials provide strong support for its function.
FeSi materials have the important characteristic of high magnetic permeability. In the Differential Mode Inductor, when the differential mode current passes through the coil wound on the FeSi core, the high magnetic permeability FeSi core can make the magnetic field inside the coil highly concentrated. This enables the inductor to generate a large self-induced electromotive force under a small current change. According to the basic principle of inductance, a large self-induced electromotive force can more effectively hinder the change of differential mode current. For the differential mode interference signal in the circuit, this hindering effect can significantly reduce its amplitude, thereby reducing the impact on the normal operation of the circuit.
The hysteresis loop characteristics of FeSi materials also play a role in this. Under the alternating magnetic field of the differential mode signal, the hysteresis loop of the FeSi core determines its energy loss and magnetic field storage capacity. The appropriate hysteresis loop shape can make the Differential Mode Inductor perform well in absorbing and consuming differential mode interference energy. In one cycle of the differential mode signal, the magnetic core undergoes magnetization and demagnetization, and converts the energy of the differential mode interference into other forms such as heat energy through hysteresis loss, thereby suppressing the propagation of the differential mode interference in the circuit.
In addition, the saturation magnetic induction intensity characteristics of the iron silicon material are also crucial. In the normal differential mode current range, the iron silicon core will not saturate easily. This ensures that the inductance value of the Differential Mode Inductor is relatively stable and can continue to effectively play the function of suppressing the differential mode current. Once the core is saturated, the inductance value will drop sharply and lose the ability to suppress the differential mode signal. The appropriate saturation magnetic induction intensity of the iron silicon material ensures that the Differential Mode Inductor can stably and reliably use its own characteristics to suppress the differential mode interference in the circuit under the designed working conditions, ensuring the normal operation of the circuit.
