- #1
Weightofananvil
- 34
- 1
Homework Statement
a magnetic circuit with a coil of 500 turns and a core of sheet steel has an air gap of 1mm. the sheet steel has a mean path length Lss = 0.25 m and a cross section that measures 1cm x 1.6 cm. (assume: u air = u0(not) = 4pi x 10^-7 wb/(Am).
determine how much coil current is required to establish a flux of phi = 2.24 x 10^-4 wb. neglect fringing
Homework Equations
b = phi/A
F=NI
F=Phi x R
I also have a B-H curve for sheet steel.
The Attempt at a Solution
Ive tried solving using B=(Unot)NI / L. And solving rearranging phi =b/a.
My textbook doesn't do a good job of explaining this material. There isn't any questions similar to this one in it or in my teachers examples. We covered the material in 1 class because "we are behind" and I write a final incorporating this material in 1.5 weeks.
Anybody know any good resources for this material because you tube offered nothing.
I'm very frustrated and being on a timeline isn't making this much easier.
Thanks in advance.
*most of the formulas I have are in relation to the mmf. I have 0 formulas in my text that relate current and the magnetic field being produced from the coil