Learning Forum

[chen.li.ellis]

I want to learn the details about litz wire model.

Right now I could set the parameters of litz wire, wire type, strand number and diameter. After simulation I get the strandedloss&strandedlossAC data, but I have no idea how the loss data be calculated. The loss data is a black box to me, and I do not know whether it is reliable.

So I want to learn the specific calculation methods about the strandedloss&strandedlossAC. If possible, I want to know what papers the methods refer to.

THx.

[MirandaH]

StrandedLossAC is reported when using Litz wire model, and dependent on the object’s material conductivity of a stranded source. It represents the loss due to the DC resistance as well as AC eddy current loss due to cross flux passing thru the Litz strands.

[chen.li.ellis]

Got it. Two more questions：

(1) What is the specific relation between strandedlossAC and the material conductivity? Can it be expressed in a formula? One of my simulation shows that when the conductivity is reduced, strandedlossAC decreases instead. This is unreasonable. The lower conductivity means a higher resistance. So I want to learn the details.

(2) What is the specific relation between strandedlossAC and the cross flux? If the stranded conductor is passed by more magnetic lines of force, the strandedlossAC is greater？Can it be expressed in a formula?

Thx a lot.

[MirandaH]

StrandedLossAC StrandedLoss + AC eddy current loss due to cross flux passing thru the Litz strands.