Ferrite Properties for Considering Ferrite Applications
What is Ferrite?
Ferrite is a ceramic
compound, which is made by mixing and firing of iron oxide along with one or two
metallic elements which has ferrimagnetic properties such
as barium, manganese, nickel, and zinc.
More details on Ferrite,
Ferrite Structure, Ferrite Properties and Ferrimagnetism you can find in my
previous blog, "Ferrite Structure and Ferrite Properties".
Ferrite Properties and Applications
Below steps signifies the
ferrite properties needed for considering ferrite applications (soft ferrite applications);
·
Common Mode
Chokes –
§ Ferrite property required is very high permeability, generally
in the range of 5000µ to 15000µ.
§ For this application ferrite shapes like; toroids, U
cores and E cores can be used.
·
Broadband
Transformers –
§ Ferrite property required is very high permeability, generally
in the range of 5000µ to 15000µ.
§ Low loss material should be use.
§ Material should support good frequency response.
§ For this application ferrite shapes like; E cores, U
cores, and I cores, Pot cores, toroids, EP cores and RM cores can be used.
·
Power Converter
and Power Inverter Transformers –
§ Ferrite property required is the permeability in the
range of 900µ to 3000µ.
§ Low loss material should be use.
§ Material should support high saturation.
§ For this application ferrite shapes like; E cores, Pot
cores, toroids, ETD cores, Planer cores and EV cores can be used.
·
Differential Mode
Inductors –
§ Ferrite property required is very high permeability,
generally in the range of 2300µ to 3000µ.
§ Material should stable at high temperature.
§ Material should stable at varying load conditions.
§ For this application ferrite shapes like; EP cores,
Gapped Pot cores, E cores, RM cores, Planer cores and PQ cores can be used.
·
Narrow Band
Transformers –
§ Ferrite property required is very high permeability,
generally in the range of 3000µ to 5000µ.
§ Material should support reasonable Q.
§ Material should stable at high temperature.
§ Material should stable at varying load conditions.
§ For this application ferrite shapes like; Pot cores,
RM cores, toroids and EP cores can be used.
·
Noise Filters –
§ Ferrite property required is very high permeability,
generally in the range of 5000µ to 15000µ.
§ Material should support good frequency response.
§ For this application ferrite shapes like; toroids and
drum cores can be used.
·
Power
Inductors –
§ Ferrite property required is the permeability in the
range of 900µ to 3000µ.
§ Material should support high saturation.
§ Material should have low losses at high temperature.
§ Material should have low losses at high flux
densities.
§ Material should stable at varying load conditions.
§ For this application ferrite shapes like; Pot cores,
RM cores, PQ cores, Planer cores and E cores can be used.
·
Power
Transformers –
§ Ferrite property required is very high permeability,
generally in the range of 900µ to 3000µ.
§ Material should have low losses at high temperature.
§ Material should have low losses at high flux
densities.
§ Material should support low moving currents.
§ For this application ferrite shapes like; Ungapped Pot
cores, toroids, EP cores, RM cores, PQ cores, Planer cores and E cores can be
used.
·
Telecom
Inductors –
§ Ferrite property required is the permeability in the
range of 2300µ to 3000µ.
§ Material should have low losses at high temperature.
§ Material should stable at varying load conditions.
§ For this application ferrite shapes like; Pot cores,
EP cores, RM cores, Planer cores and E cores can be used.
·
Pulse
Transformers –
§ Ferrite property required is very high permeability,
generally in the range of 2300µ to 3000µ.
§ Material should have low losses at high temperature.
§ Material should have low losses at high flux
densities.
§ Material should support high saturation.
§ For this application ferrite shape like; toroids can
be used.
Conclusion
Properties of ferrite
decides the ferrites application. For a ferrite, its geometrical structure along
with the ferrite material decides its behavior or properties, which directly decides its use in any application.
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