Inductor/coil/choke design confusion

[engineerting]

Hello all,
i have an equation for flux density taking the inductor chrecteristics into account as

Bmax= (Vrms * 10^8)/(4.44*A*N*f)

but the company i work for has given it at

Bmax=(Vl * 10^4)/(4.44*A*N*Vss)

where Vl = voltage across inductor.

i am finding a lot of variation for equations for the paratmeters of inductor/choke design.

i was wonderign if someone could shed light light on this confusion??

thanks

 

[sophiecentaur]

You would need to define the symbols in those formulae first. Is the second formula just for a particular circuit? (Vss seems to be a supply voltage?)
What's the background to this?

 

[engineerting]

Hello all,
i have an equation for flux density taking the inductor chrecteristics into account as

Bmax= (Vrms * 10^8)/(4.44*A*N*f)

but the company i work for has given it at

Bmax=(Vl * 10^4)/(4.44*A*N*Vss)

where Vl = voltage across inductor.

i am finding a lot of variation for equations for the paratmeters of inductor/choke design.

i was wonderign if someone could shed light light on this confusion??

thanks

You would need to define the symbols in those formulae first. Is the second formula just for a particular circuit? (Vss seems to be a supply voltage?)
What's the background to this?

Vrms = rms of supply (what i understood this to be)
A = cross section of core
N= number of turns of coil
f= frequency of supply
Vss = supply voltage

the equations given to me for choke design work but are not accurate so i started to search around for an answer. there are lot of variations in the equations and also for Inductance i found the same thing.

 

[sophiecentaur]

The formula you have been given must be making assumptions about the frequency being used and, I guess, is supposed to make life easier for you to get an answer. It looks totally wrong and it is not 'dimensionally correct' because there is a V, top and bottom. But it may work in the particular context that they want you to work.
I should ask your boss what to do, if that's acceptable in your organisation. He is paid to sort that sort of thing out (?).

 

[alphysicist]

I can understand your confusion and the variations in equations for inductor/choke design. The equations you have provided are different, but they both relate to the maximum flux density (Bmax) in the inductor. The first equation takes into account the root mean square (Vrms) voltage, while the second equation uses the voltage across the inductor (Vl). Additionally, the second equation includes the voltage source (Vss) in its calculation.

Both equations have their own assumptions and limitations, and it is important to understand the context in which each one is used. The first equation may be more suitable for AC circuits, while the second equation may be more applicable in DC circuits.

To shed more light on this confusion, I suggest looking into the source of each equation and understanding the underlying principles and assumptions. It may also be helpful to consult with colleagues or experts in the field for their insights and experiences with inductor/choke design.

Overall, it is important to carefully consider and validate the equations used in any design process, and to understand the limitations and assumptions associated with them. This will help ensure the accuracy and effectiveness of the design.