last highlighted date: 2023-04-05
Highlights
- The advantage of this circular core is that the magnetic field is contained within the core & there is very low magnetic flux leakage. Due to Low leakage flux, the magnetic field in the core is higher. This increases the inductance of toroidal core inductor & it is higher than rod or bar-shaped core inductors having the same material.
- Note: toroidal core
- The other important aspect of the toroidal core is that the core emits less electromagnetic interference (EMI) in comparison to the other inductors. Which is why they are preferred in designing compact devices, where the components are very close to each other.
- Note: they are emi safe in compact design
- This means that the inductor can withstand high peak currents without saturation but at the cost of electromagnetic interference (EMI) radiation.
- Note: bobbin core
- Shielded bobbin core inductors have an extra layer over the top of winding to complete the flux path containing the magnetic field inside the core. Such types of inductors have low EMI due to low flux leakage & high inductance due to an increase in magnetic permeability but at the cost of low saturation current compared to un-shielded core inductor.
- Note: shielded