Important factors to consider when laminating ferrite inductors. During the selection process, appropriate parameters of laminated ferrite beads are selected based on the specific application's inductance value, DC resistance, temperature characteristics, frequency requirements, current requirements, and size limitations to meet the design requirements.
The main parameters of stacked ferrite inductors include the following:
1. Inductance: Inductance refers to the inductance of a stacked ferrite inductor, usually measured in Henry's (H) units. The inductance value represents the responsiveness of the magnetic bead to current changes, and a higher inductance value means better high-frequency filtering and noise suppression capabilities.
2. Packaging size and shape: The packaging size and shape of stacked ferrite inductors are crucial for installation and layout. Common packaging shapes include cylindrical and rectangular shapes, and sizes can be selected according to different application requirements.
3. Rated Current: The rated current refers to the maximum current that a stacked ferrite inductor can withstand. It represents the current capacity of the magnetic bead under normal working conditions, and exceeding the rated current may cause overheating and performance degradation of the magnetic bead.
4. Frequency characteristics: Frequency characteristics refer to the inductance and impedance characteristics of stacked ferrite inductors at different frequencies. They are usually presented in the form of frequency inductance (L) and frequency impedance (Z) curves in data manuals to describe the frequency response range and characteristics of magnetic beads.
5. DC Resistance: DC resistance refers to the resistance value of a stacked ferrite inductor under DC conditions, usually measured in ohms (Ω). DC resistance has no effect on the transmission of DC signals, but it generates a certain amount of power consumption.