A sinusoidal current carrying conductor is surrounded by nonlinear ferromagnetic core.

**Problem Type:**

A plane-parallel problem of nonlinear AC magnetics.

**Geometry:**

**Given:**

Total current *I* = 500 A.

Frequency *f* = 50 Hz.

Core BH-curve: *H* = 100·*B*^{2}

**Problem:**

Calculate *B* and *H* distribution along the radius *r*.

**Results:**

To calculate the sinusoidal filed distribution in nonlinear core we should use the modified curve B'(H) (see Formulations in AC Magnetics).

In this particular case the modified BH-curve can be calculated as B`(H) = B(H) * (1 + 1/sqrt(180))

B,H distribution along the radius

See the *HMagn3.pbm* problem in the Examples folder.