# Magnetic circuit

A magnetic circuit may be considered as path followed by the magnetic flux. A rectangular core of magnetic material is wounded with N turn of a coil carrying a current of I amperes.

Types of magnetic material are wounds with N turn of a coil carrying a current of I amperes.

### Types of magnetic circuit

1. Series magnetic circuit
2. Parallel magnetic circuit

Series magnetic circuit

• The same flux ∅ passes through all the parts of the series magnetic circuit.
• The total reluctance of the series magnetic circuit is the sum of the reluctances of the series- connected parts of the magnetic circuit.
• The total mmf is equal to the sum of the mmfs required for the individual parts of the series magnetic circuit.

The series magnetic circuit are classified as:

1. Simple series magnetic circuits
2. Composite series magnetic circuit

Parallel magnetic circuit

• A parallel magnetic circuit has the same mmf appearing across all the parallel parts.
• The total is the sum of the fluxes in the individual parallel parts of the magnetic circuit.
• ∅= ∅1+∅2
• The reciprocal of the effective reluctances is equal to the sum the reciprocals of the reluctances of the individual parallel parts.
• 1/S =1/(S1)+1/(S2)