[SOLVED] slowest ferrite material

[Zak28]

whats the slowest ferrite material

What would be the slowest ferrite core material?

Im trying to get an estimate to how much worse ferrite can be than ordinary silicon steel found in most mains powered equipment supplies.

 

[smijesh]

Your quary is not clear

Ferrite materials are not substitute for silicon steel most of the application.
Ferrite materials having less flux density 0.4T steel having 2T so you have to increase more turns in ferrite core. especially 50 /60Hz application practically not worth

 

[Zak28]

Your quary is not clear

Ferrite materials are not substitute for silicon steel most of the application.
Ferrite materials having less flux density 0.4T steel having 2T so you have to increase more turns in ferrite core. especially 50 /60Hz application practically not worth

The speed was meant in terms of frequency to eddy losses.

Silicon steel will not sustain high frequencies without substantial power losses but Im not sure if ferrites can be the same or much worse than silicon steel.

 

[smijesh]

Ferrites have an advantage over other types of magnetic materials due to their high electrical resistivity and low eddy current losses over a wide frequency range, So ferrite materials highly used in high frequency range

 

[Zak28]

Which ferrite has the slowest frequency to eddy loss rating?

 

[c_mitra]

Im trying to get an estimate to how much worse ferrite can be than ordinary silicon steel found in most mains powered equipment supplies.

If you want to use ferrite core transformers at 50/60Hz and with power input/output of (say 100W) you may be out of luck: ferrite cores of suitable sizes (it may be very large) may not be available.

Perhaps you can assemble one by stacking ferrite bars (you may need a big budget) together.

Let us try to guess some rough measurements. Energy transferred from input to output per cycle will be roughly the same; hence power handling capacity will be directly proportional to the frequency.

Hence the transformer at 50Hz will be roughly about 1000 times larger in size to the one working at 50kHz. If the transformer working at 50kHz has a material volume of 1 in3, the corresponding one working at 50Hz will be 1000in3 (roughly 20kg).

Hysteresis losses are also proportional to the frequency; hence the losses will be reduced. Eddy losses will be very less anyway.

You can get an equivalent transformer made of silicon steel (with laminations to reduce the eddy losses) at perhaps 50 times smaller size (weight).

Ferrite cores are not suitable for low frequency operations.