Magnetic Circuit Magnetomotive Force Magnetic Field Intensity Reluctance
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=bsaRevzsqbg
55 - Linear Magnetic Circuits Example 1 • In this video we shall solve a question on linear magnetic circuits. In a linear magnetic circuit the reluctance is independent on the flux density and the relative permeability of the magnetic material is constant. Again all the laws of electric circuits, can be applied. • A magnetic circuit is made up of a closed path where a magnetic field represented as lines of magnetic flux are confined. • Given a magnetic circuit composed of iron core and an air gap, lets assume that a coil of N turns is wound around the iron core. The current in the coil produced by the voltage generates magnetic field around the core which in turn sets up magnetic flux within the circuit. This flux is same throughout the iron and air gap. • the source of the magnetic circuit is called - mmf -magnetomotive force • Resistance - Reluctance and • Current - Magnetic flux • F = IN, I = current in the coil, N = number of turns pf the coil • H = F/l - magnetic field intensity • B = flux/A, magnetic flux density • F = flux (Ra+Rc) • F = Fa + Fc 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