inductance sizing

[HUNstudent]

In my homework I have to design (make a complet plan just on paper) an 100 mH inductance. The current is 50 A. (+/-50A). The frequency is 1 KHz. And I have to use hipersil core.

Please help me!

(If somebody answer me, please don't use slang, because I am not perfect in english )

 

[jcircuited]

hi there

would u please tell me what does hipersil core mean????

 

[HUNstudent]

hi there

would u please tell me what does hipersil core mean????

[Amps] Hipersil, the myth and the truth. (Updated)

Or if you want to answer me: I need use an hipersil core, I don't know what parameters, and I hadn't found any concrete data from hipersils yet.

 

[Sceadwian]

Without basic information about the core, there's not much to go on.

 

[MrAl]

Hi,

See if these spec's might help get you started:

Initial permeability: 1500
Max perm: 35000
Coercivity: 0.1 to 0.3 Oe
Retentivity: 13,700 G
Bmax: 20000 G
Resistivity: 50 uOhm-cm
Curie temp: 750 C

 

[HUNstudent]

Hi everybody, thanks the answers!

First of all I want to know the principle of the inductance sizing. I think MrAl give a hipresil core's parameters. I think these parameters are good for me, to know how to sizing an inductance.

If the physical size's parameters and the core's shape are missing, I ask you to use whatever core (that you think is good) to show me the sizing.

 

[MrAl]

Hi again,


You mean you want to be able to calculate the inductance of a given construction of metal and wire?
That is, given a core with known spec's and the number of turns of wire you want to calculate the inductance?

 

[HUNstudent]

Hi,

My exercise: Design an inductance.
data:
I=50 A (effective)
f=1 kHz
L=100 mH
------------------------------------------
core=?
wire=?
size=?

 

[MrAl]

Hi again,


Weren't you given any formulas or theory for designing an inductor carrying a DC current yet?

 

[HUNstudent]

Hi,

The current is: sinusoid current with an 50A peak.

I solved the first step:
From the strenght of the current, I specify the grossness of the wire. So I will count with an 5mm diameter of the wire.

I can't solve the second step:
Please tell me what type of core should I use? Ferrit or Hipersil? And why?

Can you give me a step by step guide how to design this inductor?

 

[MrAl]

Hello,


I think you should also pay a visit to the Magnetics Inc. web site where they have lots of information on designing inductors for various applications.
You also should state if it is a sine wave or square wave, and if it will be used in a tuned filter or a
power supply filter or whatever it will be used for.

 

[Hero999]

A 100mH coil with a current rating of 50mH is going to be huge, the energy stored is 125 Joules.

 

[MrAl]

A 100mH coil with a current rating of 50mH is going to be huge, the energy stored is 125 Joules.

Hi,

Did you mean a current rating of 50 amps?

 

[Hero999]

Yes, lol, I mean a 100mH coil with a current rating of 50A will be huge.