Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

How to calculate core loss coefficient

Status
Not open for further replies.
K

kajal99305

Newbie level 3
Joined
Jul 28, 2016
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
28
Hello Guys


I am having some problems with understanding the calculation of core loss coefficient, K_fe. In the book 'Fundamental of power Electronics' By Robert W. Erickson, during the design procedure of Transformer for isolated Cuk converter, K_fe has been considered as 24.7 W/T_power(β) cm3 for 200 KHz ,β=2.6 for a ferrite pot core consisting of Magnetics, Inc. P-material. My question is, where did he get this value? Can anyone help me out ?

TIA

Kazaal
 

Kfe is a parameter that depends on the core material and is extracted from the datasheet for a fixed frequency.
 
CataM said:
Kfe is a parameter that depends on the core material and is extracted from the datasheet for a fixed frequency.
Click to expand...

Thank you very much CataM. I know it depends on the frequency and the type of material of the core. The problem, my calculation doesn't match with the book. Obviously I am making some mistake. Here is my calculation

For P material of Magnetics for 200 Khz Untitled.png

at 70 mT core loss is 100mW/cm3

so what would be the K_fe ? Simple core loss divided by the flux density, right?

But according to the book it doesn't seems so and so far I know the k_fe depends on the material not on the type of core.
 

Worry less about the K value and more about keeping your design below 70mT...
 

Easy peasy said:
Worry less about the K value and more about keeping your design below 70mT...
Click to expand...


Thanks. But I need the value of K_fe in order to get the minimum value of geometrical constant K_gfe for selecting the core size.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top