Electrical Engineering ⇒ Topic : Composite magnetic circuit
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David
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COMPOSITE MAGNETIC CIRCUIT Consider a toroid composed of three different magnetic materials of different permeabilities, areas and lengths excited by a coil of N turns. With a current of I amperes as shown in Fig. (a). The lengths of sections AB, BC and CA are l1,l2 and l3 respectively. Each section will have its own reluctance and permeability. Since all of them are joined in series, the total reluctance of the combined magnetic circuit is given by figure (a) | |
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William
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Reluctance of a Composite Magnetic Circuit Consider a composite magnetic circuit as shown in Fig. (a), which consists of three types of the magnetic materials A, B and C with l1,l2 and l3 their mean lengths, A1, A2 and A3 their cross-sectional area and μ1,μ2 and μ3 their FIGURE (a) A composite magnetic circuit having two iron specimens A and B Equation (1) suggests that the reluctances of different materials carried by a single magnetic line of force add up to each other, which is analogous to the addition of resistance connected in series in an electric circuit. | |
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