Hollow coil, advantages of hollow coil. The reason for choosing hollow coil.

【Hollow coil, advantages of hollow coil. The reason for choosing hollow coil】

The core advantages of hollow coil are: no magnetic saturation, extremely low high-frequency loss (high Q value), excellent linearity, fast response speed, and good temperature stability. ‌‌

Detailed explanation of core advantages

1) Non magnetic saturation characteristics: The magnetic circuit medium is air or non-magnetic material, with constant magnetic permeability and no decrease in inductance under high current, suitable for measuring impulse current or high-power scenarios.

2) Low loss and high Q value: The hysteresis loss and eddy current loss caused by the absence of an iron core (no iron loss) maintain extremely low dielectric loss only at high frequencies, and the quality factor (Q value) is significantly higher than that of a coil with a magnetic core.

3) Excellent linearity: The inductance and current exhibit a strict linear relationship, with no hysteresis loop effect and minimal waveform distortion, making it suitable for high-precision signal processing and harmonic analysis.

Broadband and fast response: Without magnetic core inertia limitation, the frequency response range is extremely wide (up to MHz level), and it responds quickly to transient signals without phase delay.

4) Strong environmental stability: The temperature coefficient is extremely low, and the inductance value is less affected by temperature changes; Simple structure, no magnetic core aging problem, high long-term reliability.