Coil / transformer on ferrite rod?

[Jadeit]

I have 100mm long ferrite rod diameter 100mm , there are 18 turns of copper strip 10mm x 3 mm on the rod . As second ciol in on the rod 10 turn of 1mm wire.
My question

1. What is the induction of the coil (high current)? yes it will depend on the type of ferrite, but I am not able to find out, is there an internet calculator for calculating the induction of coils with a ferrite rod core?
2. Is it possible to look at both coils as a transformer with a gear diameter of 18:10?

 

[Jadeit]

Sorry diameter of the rod is 10mm

 

[danadakk]

Classic relationship in a transformer is -

E1, N1, I1 primary, E2, N2, I2 secondary. Turns ratio N1 / N2.

Yes, Ratio is 18/10 = 1.8




Regards, Dana.

 

[FvM]

The coil geometry has too many parameters to be handled by "calculator". You can get a pretty accurate field simulation by a 2.5-D solver in axisymmetric mode, e.g. free FEMM tool. If you sketch the geometrie exactly, we might be able to help you.

 

[Jadeit]

Her is foto of coil CU is 10x3 mm

 

[FvM]

With a µr = 300 rod, I see an inductance of 14.4 µH for the primary, 7.0 µH for the secondary and coupling factor of 0.94 at 100 Hz. Eddy currents cause a reduction of inductance to about 12 µH at 10 kHz. Higher core µr values give only a slight increase of inductance.

Core saturation starts at 30 to 40 A. What's the intended current and frequency range?

Current density plot at 100 Hz

Current density plot at 10 kHz