Magnetic core uniformity
Magnetic core uniformity
(OP)
I am building a C-core similar to the one shown below. there are coils on both down "legs" of the core, and run in complementing polarity. Size constraints prevent me from using uniform cross-sectional area for the vertical and horizontal sections of the core. The horizontal x-section is only 25% the area of the vertical legs. How much of an impact will this have over a core with uniform dimensions in regards to flux generation at the poles? Would I be better off reducing the size of the coils but increasing the thickness of the horizontal section? Is FEA the best way to make this determination?
___________
| ______ |
| | | |
| | | |
|_| |_|
___________
| ______ |
| | | |
| | | |
|_| |_|





RE: Magnetic core uniformity
Mike
RE: Magnetic core uniformity
It's not possible to be certain from the information that you have supplied. However, MJR2 is correct, if you are attempting to drive the verticle "legs" anywhere close to saturation, and they are the same material as the horizontal portion of the frame, then the reluctance of the horizontal section will be very high soaking up a bunch of the input power.
This does not require FEA to solve. A simple sum of the reluctances math model can be generated via Roter's method, and can be used to optimize the design for steady state. This is easily accomplished via a spreadsheet.
-Tony Staples
www.tscombustion.com