Electrical Engineering ⇒ Topic : Analysis of series magnetic circuits

ANALYSIS OF SERIES MAGNETIC CIRCUITS

A series magnetic circuit is analogous to a series electric circuit. Kirchhoff's laws are applicable to magnetic circuits also. Consider a ring specimen having a magnetic path of 1 meters, area of cross-section (A) m² with a mean radius of R meters having a coil of N turns carrying I amperes wound uniformly as shown in Fig. (a). MMF is responsible for the establishment of flux in the magnetic medium. This mmf acts along the magnetic lines of force. The flux produced by the circuit is given by

                                                                                figure (a)

NI is the mmf of the magnetic circuit, which is analogous to emf in electric circuit. l/μ_oμ_r, A is the reluctance of the magnetic circuit which is analogous to resistance in electric circuit.