I want to try to make an electromagnet, but I don't have soft-iron available. I've read that ferrite MnZn are suitable as soft-iron to create a high efficiency magnets with the inconvenient of lower magnetic saturation.
I'd like to know If with my specifics I can occur in this saturation range. Magnet will be activated with a frequency of 10 kHz to control and keep current at 1A-1.5A. About 50 turns are applied. Dimensions of core are 10mm diameter and length 30mm Ferrite type is an MnZn. Relative permeability from datasheet 15000µ/µ₀ at 10kHz, permeability µ₀ 0.3*10-3 H/m at 10kHz.
Applying this equation: B = µ₀ * N * I / L
- µ₀ 0.3*10-3 H/m
- N 50
- I 1.5A
- L 0.030m
B = 0.6 * 10-4
Can be this value be so low and can I be so far from saturation? Even if I apply 10A I'm very far from saturation. This mean that saturation is something that occur in very particular applications where high current, lengths and number of turn are involved?